From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf
Date: Sun, 2 Oct 2022 21:28:53 -0700
Subject: [PATCH] Threaded Regions
See https://docs.papermc.io/folia/reference/overview and
https://docs.papermc.io/folia/reference/region-logic
diff --git a/src/main/java/ca/spottedleaf/concurrentutil/collection/MultiThreadedQueue.java b/src/main/java/ca/spottedleaf/concurrentutil/collection/MultiThreadedQueue.java
index f4415f782b32fed25da98e44b172f717c4d46e34..ba7c24b3627a1827721d2462add15fdd4adbed90 100644
--- a/src/main/java/ca/spottedleaf/concurrentutil/collection/MultiThreadedQueue.java
+++ b/src/main/java/ca/spottedleaf/concurrentutil/collection/MultiThreadedQueue.java
@@ -392,6 +392,24 @@ public class MultiThreadedQueue implements Queue {
}
}
+ /**
+ * Returns whether this queue is currently add-blocked. That is, whether {@link #add(Object)} and friends will return {@code false}.
+ */
+ public boolean isAddBlocked() {
+ for (LinkedNode tail = this.getTailOpaque();;) {
+ LinkedNode next = tail.getNextVolatile();
+ if (next == null) {
+ return false;
+ }
+
+ if (next == tail) {
+ return true;
+ }
+
+ tail = next;
+ }
+ }
+
/**
* Atomically removes the head from this queue if it exists, otherwise prevents additions to this queue if no
* head is removed.
diff --git a/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRInt2IntHashTable.java b/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRInt2IntHashTable.java
new file mode 100644
index 0000000000000000000000000000000000000000..7869cc177c95e26dd9e1d3db5b50e996956edb24
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRInt2IntHashTable.java
@@ -0,0 +1,664 @@
+package ca.spottedleaf.concurrentutil.map;
+
+import ca.spottedleaf.concurrentutil.util.ArrayUtil;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import ca.spottedleaf.concurrentutil.util.Validate;
+import io.papermc.paper.util.IntegerUtil;
+import java.lang.invoke.VarHandle;
+import java.util.Arrays;
+import java.util.function.Consumer;
+import java.util.function.IntConsumer;
+
+public class SWMRInt2IntHashTable {
+
+ protected int size;
+
+ protected TableEntry[] table;
+
+ protected final float loadFactor;
+
+ protected static final VarHandle SIZE_HANDLE = ConcurrentUtil.getVarHandle(SWMRInt2IntHashTable.class, "size", int.class);
+ protected static final VarHandle TABLE_HANDLE = ConcurrentUtil.getVarHandle(SWMRInt2IntHashTable.class, "table", TableEntry[].class);
+
+ /* size */
+
+ protected final int getSizePlain() {
+ return (int)SIZE_HANDLE.get(this);
+ }
+
+ protected final int getSizeOpaque() {
+ return (int)SIZE_HANDLE.getOpaque(this);
+ }
+
+ protected final int getSizeAcquire() {
+ return (int)SIZE_HANDLE.getAcquire(this);
+ }
+
+ protected final void setSizePlain(final int value) {
+ SIZE_HANDLE.set(this, value);
+ }
+
+ protected final void setSizeOpaque(final int value) {
+ SIZE_HANDLE.setOpaque(this, value);
+ }
+
+ protected final void setSizeRelease(final int value) {
+ SIZE_HANDLE.setRelease(this, value);
+ }
+
+ /* table */
+
+ protected final TableEntry[] getTablePlain() {
+ //noinspection unchecked
+ return (TableEntry[])TABLE_HANDLE.get(this);
+ }
+
+ protected final TableEntry[] getTableAcquire() {
+ //noinspection unchecked
+ return (TableEntry[])TABLE_HANDLE.getAcquire(this);
+ }
+
+ protected final void setTablePlain(final TableEntry[] table) {
+ TABLE_HANDLE.set(this, table);
+ }
+
+ protected final void setTableRelease(final TableEntry[] table) {
+ TABLE_HANDLE.setRelease(this, table);
+ }
+
+ protected static final int DEFAULT_CAPACITY = 16;
+ protected static final float DEFAULT_LOAD_FACTOR = 0.75f;
+ protected static final int MAXIMUM_CAPACITY = Integer.MIN_VALUE >>> 1;
+
+ /**
+ * Constructs this map with a capacity of {@code 16} and load factor of {@code 0.75f}.
+ */
+ public SWMRInt2IntHashTable() {
+ this(DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR);
+ }
+
+ /**
+ * Constructs this map with the specified capacity and load factor of {@code 0.75f}.
+ * @param capacity specified initial capacity, > 0
+ */
+ public SWMRInt2IntHashTable(final int capacity) {
+ this(capacity, DEFAULT_LOAD_FACTOR);
+ }
+
+ /**
+ * Constructs this map with the specified capacity and load factor.
+ * @param capacity specified capacity, > 0
+ * @param loadFactor specified load factor, > 0 && finite
+ */
+ public SWMRInt2IntHashTable(final int capacity, final float loadFactor) {
+ final int tableSize = getCapacityFor(capacity);
+
+ if (loadFactor <= 0.0 || !Float.isFinite(loadFactor)) {
+ throw new IllegalArgumentException("Invalid load factor: " + loadFactor);
+ }
+
+ //noinspection unchecked
+ final TableEntry[] table = new TableEntry[tableSize];
+ this.setTablePlain(table);
+
+ if (tableSize == MAXIMUM_CAPACITY) {
+ this.threshold = -1;
+ } else {
+ this.threshold = getTargetCapacity(tableSize, loadFactor);
+ }
+
+ this.loadFactor = loadFactor;
+ }
+
+ /**
+ * Constructs this map with a capacity of {@code 16} or the specified map's size, whichever is larger, and
+ * with a load factor of {@code 0.75f}.
+ * All of the specified map's entries are copied into this map.
+ * @param other The specified map.
+ */
+ public SWMRInt2IntHashTable(final SWMRInt2IntHashTable other) {
+ this(DEFAULT_CAPACITY, DEFAULT_LOAD_FACTOR, other);
+ }
+
+ /**
+ * Constructs this map with a minimum capacity of the specified capacity or the specified map's size, whichever is larger, and
+ * with a load factor of {@code 0.75f}.
+ * All of the specified map's entries are copied into this map.
+ * @param capacity specified capacity, > 0
+ * @param other The specified map.
+ */
+ public SWMRInt2IntHashTable(final int capacity, final SWMRInt2IntHashTable other) {
+ this(capacity, DEFAULT_LOAD_FACTOR, other);
+ }
+
+ /**
+ * Constructs this map with a min capacity of the specified capacity or the specified map's size, whichever is larger, and
+ * with the specified load factor.
+ * All of the specified map's entries are copied into this map.
+ * @param capacity specified capacity, > 0
+ * @param loadFactor specified load factor, > 0 && finite
+ * @param other The specified map.
+ */
+ public SWMRInt2IntHashTable(final int capacity, final float loadFactor, final SWMRInt2IntHashTable other) {
+ this(Math.max(Validate.notNull(other, "Null map").size(), capacity), loadFactor);
+ this.putAll(other);
+ }
+
+ public final float getLoadFactor() {
+ return this.loadFactor;
+ }
+
+ protected static int getCapacityFor(final int capacity) {
+ if (capacity <= 0) {
+ throw new IllegalArgumentException("Invalid capacity: " + capacity);
+ }
+ if (capacity >= MAXIMUM_CAPACITY) {
+ return MAXIMUM_CAPACITY;
+ }
+ return IntegerUtil.roundCeilLog2(capacity);
+ }
+
+ /** Callers must still use acquire when reading the value of the entry. */
+ protected final TableEntry getEntryForOpaque(final int key) {
+ final int hash = SWMRInt2IntHashTable.getHash(key);
+ final TableEntry[] table = this.getTableAcquire();
+
+ for (TableEntry curr = ArrayUtil.getOpaque(table, hash & (table.length - 1)); curr != null; curr = curr.getNextOpaque()) {
+ if (key == curr.key) {
+ return curr;
+ }
+ }
+
+ return null;
+ }
+
+ protected final TableEntry getEntryForPlain(final int key) {
+ final int hash = SWMRInt2IntHashTable.getHash(key);
+ final TableEntry[] table = this.getTablePlain();
+
+ for (TableEntry curr = table[hash & (table.length - 1)]; curr != null; curr = curr.getNextPlain()) {
+ if (key == curr.key) {
+ return curr;
+ }
+ }
+
+ return null;
+ }
+
+ /* MT-Safe */
+
+ /** must be deterministic given a key */
+ protected static int getHash(final int key) {
+ return it.unimi.dsi.fastutil.HashCommon.mix(key);
+ }
+
+ // rets -1 if capacity*loadFactor is too large
+ protected static int getTargetCapacity(final int capacity, final float loadFactor) {
+ final double ret = (double)capacity * (double)loadFactor;
+ if (Double.isInfinite(ret) || ret >= ((double)Integer.MAX_VALUE)) {
+ return -1;
+ }
+
+ return (int)ret;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ /* Make no attempt to deal with concurrent modifications */
+ if (!(obj instanceof SWMRInt2IntHashTable)) {
+ return false;
+ }
+ final SWMRInt2IntHashTable other = (SWMRInt2IntHashTable)obj;
+
+ if (this.size() != other.size()) {
+ return false;
+ }
+
+ final TableEntry[] table = this.getTableAcquire();
+
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ final int value = curr.getValueAcquire();
+
+ final int otherValue = other.get(curr.key);
+ if (value != otherValue) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public int hashCode() {
+ /* Make no attempt to deal with concurrent modifications */
+ int hash = 0;
+ final TableEntry[] table = this.getTableAcquire();
+
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ hash += curr.hashCode();
+ }
+ }
+
+ return hash;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public String toString() {
+ final StringBuilder builder = new StringBuilder(64);
+ builder.append("SingleWriterMultiReaderHashMap:{");
+
+ this.forEach((final int key, final int value) -> {
+ builder.append("{key: \"").append(key).append("\", value: \"").append(value).append("\"}");
+ });
+
+ return builder.append('}').toString();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public SWMRInt2IntHashTable clone() {
+ return new SWMRInt2IntHashTable(this.getTableAcquire().length, this.loadFactor, this);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void forEach(final Consumer super SWMRInt2IntHashTable.TableEntry> action) {
+ Validate.notNull(action, "Null action");
+
+ final TableEntry[] table = this.getTableAcquire();
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ action.accept(curr);
+ }
+ }
+ }
+
+ @FunctionalInterface
+ public static interface BiIntIntConsumer {
+ public void accept(final int key, final int value);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void forEach(final BiIntIntConsumer action) {
+ Validate.notNull(action, "Null action");
+
+ final TableEntry[] table = this.getTableAcquire();
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ final int value = curr.getValueAcquire();
+
+ action.accept(curr.key, value);
+ }
+ }
+ }
+
+ /**
+ * Provides the specified consumer with all keys contained within this map.
+ * @param action The specified consumer.
+ */
+ public void forEachKey(final IntConsumer action) {
+ Validate.notNull(action, "Null action");
+
+ final TableEntry[] table = this.getTableAcquire();
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ action.accept(curr.key);
+ }
+ }
+ }
+
+ /**
+ * Provides the specified consumer with all values contained within this map. Equivalent to {@code map.values().forEach(Consumer)}.
+ * @param action The specified consumer.
+ */
+ public void forEachValue(final IntConsumer action) {
+ Validate.notNull(action, "Null action");
+
+ final TableEntry[] table = this.getTableAcquire();
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry curr = ArrayUtil.getOpaque(table, i); curr != null; curr = curr.getNextOpaque()) {
+ final int value = curr.getValueAcquire();
+
+ action.accept(value);
+ }
+ }
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int get(final int key) {
+ final TableEntry entry = this.getEntryForOpaque(key);
+ return entry == null ? 0 : entry.getValueAcquire();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public boolean containsKey(final int key) {
+ final TableEntry entry = this.getEntryForOpaque(key);
+ return entry != null;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int getOrDefault(final int key, final int defaultValue) {
+ final TableEntry entry = this.getEntryForOpaque(key);
+
+ return entry == null ? defaultValue : entry.getValueAcquire();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int size() {
+ return this.getSizeAcquire();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public boolean isEmpty() {
+ return this.getSizeAcquire() == 0;
+ }
+
+ /* Non-MT-Safe */
+
+ protected int threshold;
+
+ protected final void checkResize(final int minCapacity) {
+ if (minCapacity <= this.threshold || this.threshold < 0) {
+ return;
+ }
+
+ final TableEntry[] table = this.getTablePlain();
+ int newCapacity = minCapacity >= MAXIMUM_CAPACITY ? MAXIMUM_CAPACITY : IntegerUtil.roundCeilLog2(minCapacity);
+ if (newCapacity < 0) {
+ newCapacity = MAXIMUM_CAPACITY;
+ }
+ if (newCapacity <= table.length) {
+ if (newCapacity == MAXIMUM_CAPACITY) {
+ return;
+ }
+ newCapacity = table.length << 1;
+ }
+
+ //noinspection unchecked
+ final TableEntry[] newTable = new TableEntry[newCapacity];
+ final int indexMask = newCapacity - 1;
+
+ for (int i = 0, len = table.length; i < len; ++i) {
+ for (TableEntry entry = table[i]; entry != null; entry = entry.getNextPlain()) {
+ final int key = entry.key;
+ final int hash = SWMRInt2IntHashTable.getHash(key);
+ final int index = hash & indexMask;
+
+ /* we need to create a new entry since there could be reading threads */
+ final TableEntry insert = new TableEntry(key, entry.getValuePlain());
+
+ final TableEntry prev = newTable[index];
+
+ newTable[index] = insert;
+ insert.setNextPlain(prev);
+ }
+ }
+
+ if (newCapacity == MAXIMUM_CAPACITY) {
+ this.threshold = -1; /* No more resizing */
+ } else {
+ this.threshold = getTargetCapacity(newCapacity, this.loadFactor);
+ }
+ this.setTableRelease(newTable); /* use release to publish entries in table */
+ }
+
+ protected final int addToSize(final int num) {
+ final int newSize = this.getSizePlain() + num;
+
+ this.setSizeOpaque(newSize);
+ this.checkResize(newSize);
+
+ return newSize;
+ }
+
+ protected final int removeFromSize(final int num) {
+ final int newSize = this.getSizePlain() - num;
+
+ this.setSizeOpaque(newSize);
+
+ return newSize;
+ }
+
+ protected final int put(final int key, final int value, final boolean onlyIfAbsent) {
+ final TableEntry[] table = this.getTablePlain();
+ final int hash = SWMRInt2IntHashTable.getHash(key);
+ final int index = hash & (table.length - 1);
+
+ final TableEntry head = table[index];
+ if (head == null) {
+ final TableEntry insert = new TableEntry(key, value);
+ ArrayUtil.setRelease(table, index, insert);
+ this.addToSize(1);
+ return 0;
+ }
+
+ for (TableEntry curr = head;;) {
+ if (key == curr.key) {
+ if (onlyIfAbsent) {
+ return curr.getValuePlain();
+ }
+
+ final int currVal = curr.getValuePlain();
+ curr.setValueRelease(value);
+ return currVal;
+ }
+
+ final TableEntry next = curr.getNextPlain();
+ if (next != null) {
+ curr = next;
+ continue;
+ }
+
+ final TableEntry insert = new TableEntry(key, value);
+
+ curr.setNextRelease(insert);
+ this.addToSize(1);
+ return 0;
+ }
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int put(final int key, final int value) {
+ return this.put(key, value, false);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int putIfAbsent(final int key, final int value) {
+ return this.put(key, value, true);
+ }
+
+ protected final int remove(final int key, final int hash) {
+ final TableEntry[] table = this.getTablePlain();
+ final int index = (table.length - 1) & hash;
+
+ final TableEntry head = table[index];
+ if (head == null) {
+ return 0;
+ }
+
+ if (head.key == key) {
+ ArrayUtil.setRelease(table, index, head.getNextPlain());
+ this.removeFromSize(1);
+
+ return head.getValuePlain();
+ }
+
+ for (TableEntry curr = head.getNextPlain(), prev = head; curr != null; prev = curr, curr = curr.getNextPlain()) {
+ if (key == curr.key) {
+ prev.setNextRelease(curr.getNextPlain());
+ this.removeFromSize(1);
+
+ return curr.getValuePlain();
+ }
+ }
+
+ return 0;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int remove(final int key) {
+ return this.remove(key, SWMRInt2IntHashTable.getHash(key));
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void putAll(final SWMRInt2IntHashTable map) {
+ Validate.notNull(map, "Null map");
+
+ final int size = map.size();
+ this.checkResize(Math.max(this.getSizePlain() + size/2, size)); /* preemptively resize */
+ map.forEach(this::put);
+ }
+
+ /**
+ * {@inheritDoc}
+ *
+ * This call is non-atomic and the order that which entries are removed is undefined. The clear operation itself
+ * is release ordered, that is, after the clear operation is performed a release fence is performed.
+ *
+ */
+ public void clear() {
+ Arrays.fill(this.getTablePlain(), null);
+ this.setSizeRelease(0);
+ }
+
+ public static final class TableEntry {
+
+ protected final int key;
+ protected int value;
+
+ protected TableEntry next;
+
+ protected static final VarHandle VALUE_HANDLE = ConcurrentUtil.getVarHandle(TableEntry.class, "value", Object.class);
+ protected static final VarHandle NEXT_HANDLE = ConcurrentUtil.getVarHandle(TableEntry.class, "next", TableEntry.class);
+
+ /* value */
+
+ protected final int getValuePlain() {
+ //noinspection unchecked
+ return (int)VALUE_HANDLE.get(this);
+ }
+
+ protected final int getValueAcquire() {
+ //noinspection unchecked
+ return (int)VALUE_HANDLE.getAcquire(this);
+ }
+
+ protected final void setValueRelease(final int to) {
+ VALUE_HANDLE.setRelease(this, to);
+ }
+
+ /* next */
+
+ protected final TableEntry getNextPlain() {
+ //noinspection unchecked
+ return (TableEntry)NEXT_HANDLE.get(this);
+ }
+
+ protected final TableEntry getNextOpaque() {
+ //noinspection unchecked
+ return (TableEntry)NEXT_HANDLE.getOpaque(this);
+ }
+
+ protected final void setNextPlain(final TableEntry next) {
+ NEXT_HANDLE.set(this, next);
+ }
+
+ protected final void setNextRelease(final TableEntry next) {
+ NEXT_HANDLE.setRelease(this, next);
+ }
+
+ protected TableEntry(final int key, final int value) {
+ this.key = key;
+ this.value = value;
+ }
+
+ public int getKey() {
+ return this.key;
+ }
+
+ public int getValue() {
+ return this.getValueAcquire();
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public int setValue(final int value) {
+ final int curr = this.getValuePlain();
+
+ this.setValueRelease(value);
+ return curr;
+ }
+
+ protected static int hash(final int key, final int value) {
+ return SWMRInt2IntHashTable.getHash(key) ^ SWMRInt2IntHashTable.getHash(value);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public int hashCode() {
+ return hash(this.key, this.getValueAcquire());
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean equals(final Object obj) {
+ if (this == obj) {
+ return true;
+ }
+
+ if (!(obj instanceof TableEntry)) {
+ return false;
+ }
+ final TableEntry other = (TableEntry)obj;
+ final int otherKey = other.getKey();
+ final int thisKey = this.getKey();
+ final int otherValue = other.getValueAcquire();
+ final int thisVal = this.getValueAcquire();
+ return (thisKey == otherKey) && (thisVal == otherValue);
+ }
+ }
+
+}
diff --git a/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRLong2ObjectHashTable.java b/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRLong2ObjectHashTable.java
index 1e98f778ffa0a7bb00ebccaaa8bde075183e41f0..aebe82cbe8bc20e5f4260a871d7b620e5092b2c9 100644
--- a/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRLong2ObjectHashTable.java
+++ b/src/main/java/ca/spottedleaf/concurrentutil/map/SWMRLong2ObjectHashTable.java
@@ -534,6 +534,44 @@ public class SWMRLong2ObjectHashTable {
return null;
}
+ protected final V remove(final long key, final int hash, final V expect) {
+ final TableEntry[] table = this.getTablePlain();
+ final int index = (table.length - 1) & hash;
+
+ final TableEntry head = table[index];
+ if (head == null) {
+ return null;
+ }
+
+ if (head.key == key) {
+ final V val = head.value;
+ if (val == expect || val.equals(expect)) {
+ ArrayUtil.setRelease(table, index, head.getNextPlain());
+ this.removeFromSize(1);
+
+ return head.getValuePlain();
+ } else {
+ return null;
+ }
+ }
+
+ for (TableEntry curr = head.getNextPlain(), prev = head; curr != null; prev = curr, curr = curr.getNextPlain()) {
+ if (key == curr.key) {
+ final V val = curr.value;
+ if (val == expect || val.equals(expect)) {
+ prev.setNextRelease(curr.getNextPlain());
+ this.removeFromSize(1);
+
+ return curr.getValuePlain();
+ } else {
+ return null;
+ }
+ }
+ }
+
+ return null;
+ }
+
/**
* {@inheritDoc}
*/
@@ -541,6 +579,10 @@ public class SWMRLong2ObjectHashTable {
return this.remove(key, SWMRLong2ObjectHashTable.getHash(key));
}
+ public boolean remove(final long key, final V expect) {
+ return this.remove(key, SWMRLong2ObjectHashTable.getHash(key), expect) != null;
+ }
+
/**
* {@inheritDoc}
*/
diff --git a/src/main/java/ca/spottedleaf/concurrentutil/scheduler/SchedulerThreadPool.java b/src/main/java/ca/spottedleaf/concurrentutil/scheduler/SchedulerThreadPool.java
new file mode 100644
index 0000000000000000000000000000000000000000..0ce825d7af2a1dbeac5c22640534ee1901edce20
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/concurrentutil/scheduler/SchedulerThreadPool.java
@@ -0,0 +1,543 @@
+package ca.spottedleaf.concurrentutil.scheduler;
+
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import ca.spottedleaf.concurrentutil.util.TimeUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.TraceUtil;
+import io.papermc.paper.util.set.LinkedSortedSet;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.BitSet;
+import java.util.Comparator;
+import java.util.PriorityQueue;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.locks.LockSupport;
+import java.util.function.BooleanSupplier;
+
+public class SchedulerThreadPool {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+
+ public static final long DEADLINE_NOT_SET = Long.MIN_VALUE;
+
+ private static final Comparator TICK_COMPARATOR_BY_TIME = (final SchedulableTick t1, final SchedulableTick t2) -> {
+ final int timeCompare = TimeUtil.compareTimes(t1.scheduledStart, t2.scheduledStart);
+ if (timeCompare != 0) {
+ return timeCompare;
+ }
+
+ return Long.compare(t1.id, t2.id);
+ };
+
+ private final TickThreadRunner[] runners;
+ private final Thread[] threads;
+ private final LinkedSortedSet awaiting = new LinkedSortedSet<>(TICK_COMPARATOR_BY_TIME);
+ private final PriorityQueue queued = new PriorityQueue<>(TICK_COMPARATOR_BY_TIME);
+ private final BitSet idleThreads;
+
+ private final Object scheduleLock = new Object();
+
+ private volatile boolean halted;
+
+ public SchedulerThreadPool(final int threads, final ThreadFactory threadFactory) {
+ final BitSet idleThreads = new BitSet(threads);
+ for (int i = 0; i < threads; ++i) {
+ idleThreads.set(i);
+ }
+ this.idleThreads = idleThreads;
+
+ final TickThreadRunner[] runners = new TickThreadRunner[threads];
+ final Thread[] t = new Thread[threads];
+ for (int i = 0; i < threads; ++i) {
+ runners[i] = new TickThreadRunner(i, this);
+ t[i] = threadFactory.newThread(runners[i]);
+ }
+
+ this.threads = t;
+ this.runners = runners;
+ }
+
+ /**
+ * Starts the threads in this pool.
+ */
+ public void start() {
+ for (final Thread thread : this.threads) {
+ thread.start();
+ }
+ }
+
+ /**
+ * Attempts to prevent further execution of tasks, optionally waiting for the scheduler threads to die.
+ *
+ * @param sync Whether to wait for the scheduler threads to die.
+ * @param maxWaitNS The maximum time, in ns, to wait for the scheduler threads to die.
+ * @return {@code true} if sync was false, or if sync was true and the scheduler threads died before the timeout.
+ * Otherwise, returns {@code false} if the time elapsed exceeded the maximum wait time.
+ */
+ public boolean halt(final boolean sync, final long maxWaitNS) {
+ this.halted = true;
+ for (final Thread thread : this.threads) {
+ // force response to halt
+ LockSupport.unpark(thread);
+ }
+ final long time = System.nanoTime();
+ if (sync) {
+ // start at 10 * 0.5ms -> 5ms
+ for (long failures = 9L;; failures = ConcurrentUtil.linearLongBackoff(failures, 500_000L, 50_000_000L)) {
+ boolean allDead = true;
+ for (final Thread thread : this.threads) {
+ if (thread.isAlive()) {
+ allDead = false;
+ break;
+ }
+ }
+ if (allDead) {
+ return true;
+ }
+ if ((System.nanoTime() - time) >= maxWaitNS) {
+ return false;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ public void dumpAliveThreadTraces(final String reason) {
+ for (final Thread thread : this.threads) {
+ if (thread.isAlive()) {
+ TraceUtil.dumpTraceForThread(thread, reason);
+ }
+ }
+ }
+
+ /**
+ * Returns an array of the underlying scheduling threads.
+ */
+ public Thread[] getThreads() {
+ return this.threads.clone();
+ }
+
+ private void insertFresh(final SchedulableTick task) {
+ final TickThreadRunner[] runners = this.runners;
+
+ final int firstIdleThread = this.idleThreads.nextSetBit(0);
+
+ if (firstIdleThread != -1) {
+ // push to idle thread
+ this.idleThreads.clear(firstIdleThread);
+ final TickThreadRunner runner = runners[firstIdleThread];
+ task.awaitingLink = this.awaiting.addLast(task);
+ runner.acceptTask(task);
+ return;
+ }
+
+ // try to replace the last awaiting task
+ final SchedulableTick last = this.awaiting.last();
+
+ if (last != null && TICK_COMPARATOR_BY_TIME.compare(task, last) < 0) {
+ // need to replace the last task
+ this.awaiting.pollLast();
+ last.awaitingLink = null;
+ task.awaitingLink = this.awaiting.addLast(task);
+ // need to add task to queue to be picked up later
+ this.queued.add(last);
+
+ final TickThreadRunner runner = last.ownedBy;
+ runner.replaceTask(task);
+
+ return;
+ }
+
+ // add to queue, will be picked up later
+ this.queued.add(task);
+ }
+
+ private void takeTask(final TickThreadRunner runner, final SchedulableTick tick) {
+ if (!this.awaiting.remove(tick.awaitingLink)) {
+ throw new IllegalStateException("Task is not in awaiting");
+ }
+ tick.awaitingLink = null;
+ }
+
+ private SchedulableTick returnTask(final TickThreadRunner runner, final SchedulableTick reschedule) {
+ if (reschedule != null) {
+ this.queued.add(reschedule);
+ }
+ final SchedulableTick ret = this.queued.poll();
+ if (ret == null) {
+ this.idleThreads.set(runner.id);
+ } else {
+ ret.awaitingLink = this.awaiting.addLast(ret);
+ }
+
+ return ret;
+ }
+
+ public void schedule(final SchedulableTick task) {
+ synchronized (this.scheduleLock) {
+ if (!task.tryMarkScheduled()) {
+ throw new IllegalStateException("Task " + task + " is already scheduled or cancelled");
+ }
+
+ task.schedulerOwnedBy = this;
+
+ this.insertFresh(task);
+ }
+ }
+
+ public boolean updateTickStartToMax(final SchedulableTick task, final long newStart) {
+ synchronized (this.scheduleLock) {
+ if (TimeUtil.compareTimes(newStart, task.getScheduledStart()) <= 0) {
+ return false;
+ }
+ if (this.queued.remove(task)) {
+ task.setScheduledStart(newStart);
+ this.queued.add(task);
+ return true;
+ }
+ if (task.awaitingLink != null) {
+ this.awaiting.remove(task.awaitingLink);
+ task.awaitingLink = null;
+
+ // re-queue task
+ task.setScheduledStart(newStart);
+ this.queued.add(task);
+
+ // now we need to replace the task the runner was waiting for
+ final TickThreadRunner runner = task.ownedBy;
+ final SchedulableTick replace = this.queued.poll();
+
+ // replace cannot be null, since we have added a task to queued
+ if (replace != task) {
+ runner.replaceTask(replace);
+ }
+
+ return true;
+ }
+
+ return false;
+ }
+ }
+
+ /**
+ * Returns {@code null} if the task is not scheduled, returns {@code TRUE} if the task was cancelled
+ * and was queued to execute, returns {@code FALSE} if the task was cancelled but was executing.
+ */
+ public Boolean tryRetire(final SchedulableTick task) {
+ if (task.schedulerOwnedBy != this) {
+ return null;
+ }
+
+ synchronized (this.scheduleLock) {
+ if (this.queued.remove(task)) {
+ // cancelled, and no runner owns it - so return
+ return Boolean.TRUE;
+ }
+ if (task.awaitingLink != null) {
+ this.awaiting.remove(task.awaitingLink);
+ task.awaitingLink = null;
+ // here we need to replace the task the runner was waiting for
+ final TickThreadRunner runner = task.ownedBy;
+ final SchedulableTick replace = this.queued.poll();
+
+ if (replace == null) {
+ // nothing to replace with, set to idle
+ this.idleThreads.set(runner.id);
+ runner.forceIdle();
+ } else {
+ runner.replaceTask(replace);
+ }
+
+ return Boolean.TRUE;
+ }
+
+ // could not find it in queue
+ return task.tryMarkCancelled() ? Boolean.FALSE : null;
+ }
+ }
+
+ public void notifyTasks(final SchedulableTick task) {
+ // Not implemented
+ }
+
+ /**
+ * Represents a tickable task that can be scheduled into a {@link SchedulerThreadPool}.
+ *
+ * A tickable task is expected to run on a fixed interval, which is determined by
+ * the {@link SchedulerThreadPool}.
+ *
+ *
+ * A tickable task can have intermediate tasks that can be executed before its tick method is ran. Instead of
+ * the {@link SchedulerThreadPool} parking in-between ticks, the scheduler will instead drain
+ * intermediate tasks from scheduled tasks. The parsing of intermediate tasks allows the scheduler to take
+ * advantage of downtime to reduce the intermediate task load from tasks once they begin ticking.
+ *
+ *
+ * It is guaranteed that {@link #runTick()} and {@link #runTasks(BooleanSupplier)} are never
+ * invoked in parallel.
+ * It is required that when intermediate tasks are scheduled, that {@link SchedulerThreadPool#notifyTasks(SchedulableTick)}
+ * is invoked for any scheduled task - otherwise, {@link #runTasks(BooleanSupplier)} may not be invoked to
+ * parse intermediate tasks.
+ *
+ */
+ public static abstract class SchedulableTick {
+ private static final AtomicLong ID_GENERATOR = new AtomicLong();
+ public final long id = ID_GENERATOR.getAndIncrement();
+
+ private static final int SCHEDULE_STATE_NOT_SCHEDULED = 0;
+ private static final int SCHEDULE_STATE_SCHEDULED = 1;
+ private static final int SCHEDULE_STATE_CANCELLED = 2;
+
+ private final AtomicInteger scheduled = new AtomicInteger();
+ private SchedulerThreadPool schedulerOwnedBy;
+ private long scheduledStart = DEADLINE_NOT_SET;
+ private TickThreadRunner ownedBy;
+
+ private LinkedSortedSet.Link awaitingLink;
+
+ private boolean tryMarkScheduled() {
+ return this.scheduled.compareAndSet(SCHEDULE_STATE_NOT_SCHEDULED, SCHEDULE_STATE_SCHEDULED);
+ }
+
+ private boolean tryMarkCancelled() {
+ return this.scheduled.compareAndSet(SCHEDULE_STATE_SCHEDULED, SCHEDULE_STATE_CANCELLED);
+ }
+
+ private boolean isScheduled() {
+ return this.scheduled.get() == SCHEDULE_STATE_SCHEDULED;
+ }
+
+ protected final long getScheduledStart() {
+ return this.scheduledStart;
+ }
+
+ /**
+ * If this task is scheduled, then this may only be invoked during {@link #runTick()},
+ * and {@link #runTasks(BooleanSupplier)}
+ */
+ protected final void setScheduledStart(final long value) {
+ this.scheduledStart = value;
+ }
+
+ /**
+ * Executes the tick.
+ *
+ * It is the callee's responsibility to invoke {@link #setScheduledStart(long)} to adjust the start of
+ * the next tick.
+ *
+ * @return {@code true} if the task should continue to be scheduled, {@code false} otherwise.
+ */
+ public abstract boolean runTick();
+
+ /**
+ * Returns whether this task has any intermediate tasks that can be executed.
+ */
+ public abstract boolean hasTasks();
+
+ /**
+ * Returns {@code null} if this task should not be scheduled, otherwise returns
+ * {@code Boolean.TRUE} if there are more intermediate tasks to execute and
+ * {@code Boolean.FALSE} if there are no more intermediate tasks to execute.
+ */
+ public abstract Boolean runTasks(final BooleanSupplier canContinue);
+
+ @Override
+ public String toString() {
+ return "SchedulableTick:{" +
+ "class=" + this.getClass().getName() + "," +
+ "scheduled_state=" + this.scheduled.get() + ","
+ + "}";
+ }
+ }
+
+ private static final class TickThreadRunner implements Runnable {
+
+ /**
+ * There are no tasks in this thread's runqueue, so it is parked.
+ *
+ * stateTarget = null
+ *
+ */
+ private static final int STATE_IDLE = 0;
+
+ /**
+ * The runner is waiting to tick a task, as it has no intermediate tasks to execute.
+ *
+ * stateTarget = the task awaiting tick
+ *
+ */
+ private static final int STATE_AWAITING_TICK = 1;
+
+ /**
+ * The runner is executing a tick for one of the tasks that was in its runqueue.
+ *
+ * stateTarget = the task being ticked
+ *
+ */
+ private static final int STATE_EXECUTING_TICK = 2;
+
+ public final int id;
+ public final SchedulerThreadPool scheduler;
+
+ private volatile Thread thread;
+ private volatile TickThreadRunnerState state = new TickThreadRunnerState(null, STATE_IDLE);
+ private static final VarHandle STATE_HANDLE = ConcurrentUtil.getVarHandle(TickThreadRunner.class, "state", TickThreadRunnerState.class);
+
+ private void setStatePlain(final TickThreadRunnerState state) {
+ STATE_HANDLE.set(this, state);
+ }
+
+ private void setStateOpaque(final TickThreadRunnerState state) {
+ STATE_HANDLE.setOpaque(this, state);
+ }
+
+ private void setStateVolatile(final TickThreadRunnerState state) {
+ STATE_HANDLE.setVolatile(this, state);
+ }
+
+ private static record TickThreadRunnerState(SchedulableTick stateTarget, int state) {}
+
+ public TickThreadRunner(final int id, final SchedulerThreadPool scheduler) {
+ this.id = id;
+ this.scheduler = scheduler;
+ }
+
+ private Thread getRunnerThread() {
+ return this.thread;
+ }
+
+ private void acceptTask(final SchedulableTick task) {
+ if (task.ownedBy != null) {
+ throw new IllegalStateException("Already owned by another runner");
+ }
+ task.ownedBy = this;
+ final TickThreadRunnerState state = this.state;
+ if (state.state != STATE_IDLE) {
+ throw new IllegalStateException("Cannot accept task in state " + state);
+ }
+ this.setStateVolatile(new TickThreadRunnerState(task, STATE_AWAITING_TICK));
+ LockSupport.unpark(this.getRunnerThread());
+ }
+
+ private void replaceTask(final SchedulableTick task) {
+ final TickThreadRunnerState state = this.state;
+ if (state.state != STATE_AWAITING_TICK) {
+ throw new IllegalStateException("Cannot replace task in state " + state);
+ }
+ if (task.ownedBy != null) {
+ throw new IllegalStateException("Already owned by another runner");
+ }
+ task.ownedBy = this;
+
+ state.stateTarget.ownedBy = null;
+
+ this.setStateVolatile(new TickThreadRunnerState(task, STATE_AWAITING_TICK));
+ LockSupport.unpark(this.getRunnerThread());
+ }
+
+ private void forceIdle() {
+ final TickThreadRunnerState state = this.state;
+ if (state.state != STATE_AWAITING_TICK) {
+ throw new IllegalStateException("Cannot replace task in state " + state);
+ }
+ state.stateTarget.ownedBy = null;
+ this.setStateOpaque(new TickThreadRunnerState(null, STATE_IDLE));
+ // no need to unpark
+ }
+
+ private boolean takeTask(final TickThreadRunnerState state, final SchedulableTick task) {
+ synchronized (this.scheduler.scheduleLock) {
+ if (this.state != state) {
+ return false;
+ }
+ this.setStatePlain(new TickThreadRunnerState(task, STATE_EXECUTING_TICK));
+ this.scheduler.takeTask(this, task);
+ return true;
+ }
+ }
+
+ private void returnTask(final SchedulableTick task, final boolean reschedule) {
+ synchronized (this.scheduler.scheduleLock) {
+ task.ownedBy = null;
+
+ final SchedulableTick newWait = this.scheduler.returnTask(this, reschedule && task.isScheduled() ? task : null);
+ if (newWait == null) {
+ this.setStatePlain(new TickThreadRunnerState(null, STATE_IDLE));
+ } else {
+ if (newWait.ownedBy != null) {
+ throw new IllegalStateException("Already owned by another runner");
+ }
+ newWait.ownedBy = this;
+ this.setStatePlain(new TickThreadRunnerState(newWait, STATE_AWAITING_TICK));
+ }
+ }
+ }
+
+ @Override
+ public void run() {
+ this.thread = Thread.currentThread();
+
+ main_state_loop:
+ for (;;) {
+ final TickThreadRunnerState startState = this.state;
+ final int startStateType = startState.state;
+ final SchedulableTick startStateTask = startState.stateTarget;
+
+ if (this.scheduler.halted) {
+ return;
+ }
+
+ switch (startStateType) {
+ case STATE_IDLE: {
+ while (this.state.state == STATE_IDLE) {
+ LockSupport.park();
+ if (this.scheduler.halted) {
+ return;
+ }
+ }
+ continue main_state_loop;
+ }
+
+ case STATE_AWAITING_TICK: {
+ final long deadline = startStateTask.getScheduledStart();
+ for (;;) {
+ if (this.state != startState) {
+ continue main_state_loop;
+ }
+ final long diff = deadline - System.nanoTime();
+ if (diff <= 0L) {
+ break;
+ }
+ LockSupport.parkNanos(startState, diff);
+ if (this.scheduler.halted) {
+ return;
+ }
+ }
+
+ if (!this.takeTask(startState, startStateTask)) {
+ continue main_state_loop;
+ }
+
+ // TODO exception handling
+ final boolean reschedule = startStateTask.runTick();
+
+ this.returnTask(startStateTask, reschedule);
+
+ continue main_state_loop;
+ }
+
+ case STATE_EXECUTING_TICK: {
+ throw new IllegalStateException("Tick execution must be set by runner thread, not by any other thread");
+ }
+
+ default: {
+ throw new IllegalStateException("Unknown state: " + startState);
+ }
+ }
+ }
+ }
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/concurrentutil/util/TimeUtil.java b/src/main/java/ca/spottedleaf/concurrentutil/util/TimeUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..63688716244066581d5b505703576e3340e3baf3
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/concurrentutil/util/TimeUtil.java
@@ -0,0 +1,60 @@
+package ca.spottedleaf.concurrentutil.util;
+
+public final class TimeUtil {
+
+ /*
+ * The comparator is not a valid comparator for every long value. To prove where it is valid, see below.
+ *
+ * For reflexivity, we have that x - x = 0. We then have that for any long value x that
+ * compareTimes(x, x) == 0, as expected.
+ *
+ * For symmetry, we have that x - y = -(y - x) except for when y - x = Long.MIN_VALUE.
+ * So, the difference between any times x and y must not be equal to Long.MIN_VALUE.
+ *
+ * As for the transitive relation, consider we have x,y such that x - y = a > 0 and z such that
+ * y - z = b > 0. Then, we will have that the x - z > 0 is equivalent to a + b > 0. For long values,
+ * this holds as long as a + b <= Long.MAX_VALUE.
+ *
+ * Also consider we have x, y such that x - y = a < 0 and z such that y - z = b < 0. Then, we will have
+ * that x - z < 0 is equivalent to a + b < 0. For long values, this holds as long as a + b >= -Long.MAX_VALUE.
+ *
+ * Thus, the comparator is only valid for timestamps such that abs(c - d) <= Long.MAX_VALUE for all timestamps
+ * c and d.
+ */
+
+ /**
+ * This function is appropriate to be used as a {@link java.util.Comparator} between two timestamps, which
+ * indicates whether the timestamps represented by t1, t2 that t1 is before, equal to, or after t2.
+ */
+ public static int compareTimes(final long t1, final long t2) {
+ final long diff = t1 - t2;
+
+ // HD, Section 2-7
+ return (int) ((diff >> 63) | (-diff >>> 63));
+ }
+
+ public static long getGreatestTime(final long t1, final long t2) {
+ final long diff = t1 - t2;
+ return diff < 0L ? t2 : t1;
+ }
+
+ public static long getLeastTime(final long t1, final long t2) {
+ final long diff = t1 - t2;
+ return diff > 0L ? t2 : t1;
+ }
+
+ public static long clampTime(final long value, final long min, final long max) {
+ final long diffMax = value - max;
+ final long diffMin = value - min;
+
+ if (diffMax > 0L) {
+ return max;
+ }
+ if (diffMin < 0L) {
+ return min;
+ }
+ return value;
+ }
+
+ private TimeUtil() {}
+}
diff --git a/src/main/java/ca/spottedleaf/leafprofiler/LProfileGraph.java b/src/main/java/ca/spottedleaf/leafprofiler/LProfileGraph.java
new file mode 100644
index 0000000000000000000000000000000000000000..1083a3dc0fc824da176e6ee64654b8c01b80ca4b
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/leafprofiler/LProfileGraph.java
@@ -0,0 +1,89 @@
+package ca.spottedleaf.leafprofiler;
+
+import it.unimi.dsi.fastutil.ints.Int2IntMap;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+public final class LProfileGraph {
+
+ public static final int ROOT_NODE = 0;
+ // Array idx is the graph node id, where the int->int mapping is a mapping of profile timer id to graph node id
+ private Int2IntOpenHashMap[] nodes;
+ private int nodeCount;
+
+ public LProfileGraph() {
+ final Int2IntOpenHashMap[] nodes = new Int2IntOpenHashMap[16];
+ nodes[ROOT_NODE] = new Int2IntOpenHashMap();
+
+ this.nodes = nodes;
+ this.nodeCount = 1;
+ }
+
+ public static record GraphNode(GraphNode parent, int nodeId, int timerId) {}
+
+ public List getDFS() {
+ final List ret = new ArrayList<>();
+ final ArrayDeque queue = new ArrayDeque<>();
+
+ queue.addFirst(new GraphNode(null, ROOT_NODE, -1));
+ final Int2IntOpenHashMap[] nodes = this.nodes;
+
+ GraphNode graphNode;
+ while ((graphNode = queue.pollFirst()) != null) {
+ ret.add(graphNode);
+
+ final int parent = graphNode.nodeId;
+
+ final Int2IntOpenHashMap children = nodes[parent];
+
+ for (final Iterator iterator = children.int2IntEntrySet().fastIterator(); iterator.hasNext();) {
+ final Int2IntMap.Entry entry = iterator.next();
+ queue.addFirst(new GraphNode(graphNode, entry.getIntValue(), entry.getIntKey()));
+ }
+ }
+
+ return ret;
+ }
+
+ private int createNode(final int parent, final int timerId) {
+ Int2IntOpenHashMap[] nodes = this.nodes;
+
+ final Int2IntOpenHashMap node = nodes[parent];
+
+ final int newNode = this.nodeCount;
+ final int prev = node.putIfAbsent(timerId, newNode);
+
+ if (prev != 0) {
+ // already exists
+ return prev;
+ }
+
+ // insert new node
+ ++this.nodeCount;
+
+ if (newNode >= nodes.length) {
+ this.nodes = (nodes = Arrays.copyOf(nodes, nodes.length * 2));
+ }
+
+ nodes[newNode] = new Int2IntOpenHashMap();
+
+ return newNode;
+ }
+
+ public int getOrCreateNode(final int parent, final int timerId) {
+ // note: requires parent node to exist
+ final Int2IntOpenHashMap[] nodes = this.nodes;
+
+ final int mapping = nodes[parent].get(timerId);
+
+ if (mapping != 0) {
+ return mapping;
+ }
+
+ return this.createNode(parent, timerId);
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/leafprofiler/LProfilerRegistry.java b/src/main/java/ca/spottedleaf/leafprofiler/LProfilerRegistry.java
new file mode 100644
index 0000000000000000000000000000000000000000..66200c6f4bcf27d060eedf066f56b70bd0cc3929
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/leafprofiler/LProfilerRegistry.java
@@ -0,0 +1,59 @@
+package ca.spottedleaf.leafprofiler;
+
+import java.util.Arrays;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class LProfilerRegistry {
+
+ // volatile required to ensure correct publishing when resizing
+ private volatile ProfilerEntry[] typesById = new ProfilerEntry[16];
+ private int totalEntries;
+ private final ConcurrentHashMap nameToEntry = new ConcurrentHashMap<>();
+
+ public LProfilerRegistry() {
+
+ }
+
+ public ProfilerEntry getById(final int id) {
+ final ProfilerEntry[] entries = this.typesById;
+
+ return id < 0 || id >= entries.length ? null : entries[id];
+ }
+
+ public ProfilerEntry getByName(final String name) {
+ return this.nameToEntry.get(name);
+ }
+
+ public int createType(final ProfileType type, final String name) {
+ synchronized (this) {
+ final int id = this.totalEntries;
+
+ final ProfilerEntry ret = new ProfilerEntry(type, name, id);
+
+ final ProfilerEntry prev = this.nameToEntry.putIfAbsent(name, ret);
+
+ if (prev != null) {
+ throw new IllegalStateException("Entry already exists: " + prev);
+ }
+
+ ++this.totalEntries;
+
+ ProfilerEntry[] entries = this.typesById;
+
+ if (id >= entries.length) {
+ this.typesById = entries = Arrays.copyOf(entries, entries.length * 2);
+ }
+
+ // should be opaque, but I don't think that matters here.
+ entries[id] = ret;
+
+ return id;
+ }
+ }
+
+ public static enum ProfileType {
+ COUNTER, TIMER;
+ }
+
+ public static record ProfilerEntry(ProfileType type, String name, int id) {}
+}
diff --git a/src/main/java/ca/spottedleaf/leafprofiler/LeafProfiler.java b/src/main/java/ca/spottedleaf/leafprofiler/LeafProfiler.java
new file mode 100644
index 0000000000000000000000000000000000000000..24d041db762f82c16a735271dd4266b8630666ca
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/leafprofiler/LeafProfiler.java
@@ -0,0 +1,313 @@
+package ca.spottedleaf.leafprofiler;
+
+import it.unimi.dsi.fastutil.ints.IntArrayFIFOQueue;
+import it.unimi.dsi.fastutil.longs.LongArrayFIFOQueue;
+import it.unimi.dsi.fastutil.objects.Reference2ReferenceOpenHashMap;
+import java.text.DecimalFormat;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public final class LeafProfiler {
+
+ private static final ThreadLocal THREE_DECIMAL_PLACES = ThreadLocal.withInitial(() -> {
+ return new DecimalFormat("#,##0.000");
+ });
+ private static final ThreadLocal NO_DECIMAL_PLACES = ThreadLocal.withInitial(() -> {
+ return new DecimalFormat("#,##0");
+ });
+
+ public final LProfilerRegistry registry;
+ private final LProfileGraph graph;
+
+ private long[] timers = new long[16];
+ private long[] counters = new long[16];
+ private final IntArrayFIFOQueue callStack = new IntArrayFIFOQueue();
+ private int topOfStack = LProfileGraph.ROOT_NODE;
+ private final LongArrayFIFOQueue timerStack = new LongArrayFIFOQueue();
+ private long lastTimerStart = 0L;
+
+ public LeafProfiler(final LProfilerRegistry registry, final LProfileGraph graph) {
+ this.registry = registry;
+ this.graph = graph;
+ }
+
+ private long[] resizeTimers(final long[] old, final int least) {
+ return this.timers = Arrays.copyOf(old, Math.max(old.length * 2, least * 2));
+ }
+
+ private void incrementTimersDirect(final int nodeId, final long count) {
+ final long[] timers = this.timers;
+ if (nodeId >= timers.length) {
+ this.resizeTimers(timers, nodeId)[nodeId] += count;
+ } else {
+ timers[nodeId] += count;
+ }
+ }
+
+ private long[] resizeCounters(final long[] old, final int least) {
+ return this.counters = Arrays.copyOf(old, Math.max(old.length * 2, least * 2));
+ }
+
+ private void incrementCountersDirect(final int nodeId, final long count) {
+ final long[] counters = this.counters;
+ if (nodeId >= counters.length) {
+ this.resizeTimers(counters, nodeId)[nodeId] += count;
+ } else {
+ counters[nodeId] += count;
+ }
+ }
+
+ public void incrementCounter(final int timerId, final long count) {
+ final int node = this.graph.getOrCreateNode(this.topOfStack, timerId);
+ this.incrementCountersDirect(node, count);
+ }
+
+ public void incrementTimer(final int timerId, final long count) {
+ final int node = this.graph.getOrCreateNode(this.topOfStack, timerId);
+ this.incrementTimersDirect(node, count);
+ }
+
+ public void startTimer(final int timerId, final long startTime) {
+ final long lastTimerStart = this.lastTimerStart;
+ final LProfileGraph graph = this.graph;
+ final int parentNode = this.topOfStack;
+ final IntArrayFIFOQueue callStack = this.callStack;
+ final LongArrayFIFOQueue timerStack = this.timerStack;
+
+ this.lastTimerStart = startTime;
+ this.topOfStack = graph.getOrCreateNode(parentNode, timerId);
+
+ callStack.enqueue(parentNode);
+ timerStack.enqueue(lastTimerStart);
+ }
+
+ public void stopTimer(final int timerId, final long endTime) {
+ final long lastStart = this.lastTimerStart;
+ final int currentNode = this.topOfStack;
+ final IntArrayFIFOQueue callStack = this.callStack;
+ final LongArrayFIFOQueue timerStack = this.timerStack;
+ this.lastTimerStart = timerStack.dequeueLastLong();
+ this.topOfStack = callStack.dequeueLastInt();
+
+ this.incrementTimersDirect(currentNode, endTime - lastStart);
+ this.incrementCountersDirect(currentNode, 1L);
+ }
+
+ private static final char[][] INDENT_PATTERNS = new char[][] {
+ "|---".toCharArray(),
+ "|+++".toCharArray(),
+ };
+
+ public List dumpToString() {
+ final List graphDFS = this.graph.getDFS();
+ final Reference2ReferenceOpenHashMap nodeMap = new Reference2ReferenceOpenHashMap<>();
+
+ final ArrayDeque orderedNodes = new ArrayDeque<>();
+
+ for (int i = 0, len = graphDFS.size(); i < len; ++i) {
+ final LProfileGraph.GraphNode graphNode = graphDFS.get(i);
+ final ProfileNode parent = nodeMap.get(graphNode.parent());
+ final int nodeId = graphNode.nodeId();
+
+ final long totalTime = this.timers[nodeId];
+ final long totalCount = this.counters[nodeId];
+ final LProfilerRegistry.ProfilerEntry profiler = this.registry.getById(graphNode.timerId());
+
+ final ProfileNode profileNode = new ProfileNode(parent, nodeId, profiler, totalTime, totalCount);
+
+ if (parent != null) {
+ parent.childrenTimingCount += totalTime;
+ parent.children.add(profileNode);
+ } else if (i != 0) { // i == 0 is root
+ throw new IllegalStateException("Node " + nodeId + " must have parent");
+ } else {
+ // set up
+ orderedNodes.add(profileNode);
+ }
+
+ nodeMap.put(graphNode, profileNode);
+ }
+
+ final List ret = new ArrayList<>();
+
+ long totalTime = 0L;
+
+ // totalTime = sum of times for root node's children
+ for (final ProfileNode node : orderedNodes.peekFirst().children) {
+ totalTime += node.totalTime;
+ }
+
+ ProfileNode profileNode;
+ final StringBuilder builder = new StringBuilder();
+ while ((profileNode = orderedNodes.pollFirst()) != null) {
+ if (profileNode.nodeId != LProfileGraph.ROOT_NODE && profileNode.totalCount == 0L) {
+ // skip nodes not recorded
+ continue;
+ }
+
+ final int depth = profileNode.depth;
+ profileNode.children.sort((final ProfileNode p1, final ProfileNode p2) -> {
+ final int typeCompare = p1.profiler.type().compareTo(p2.profiler.type());
+ if (typeCompare != 0) {
+ // first count, then profiler
+ return typeCompare;
+ }
+
+ if (p1.profiler.type() == LProfilerRegistry.ProfileType.COUNTER) {
+ // highest count first
+ return Long.compare(p2.totalCount, p1.totalCount);
+ } else {
+ // highest time first
+ return Long.compare(p2.totalTime, p1.totalTime);
+ }
+ });
+
+ for (int i = profileNode.children.size() - 1; i >= 0; --i) {
+ final ProfileNode child = profileNode.children.get(i);
+ child.depth = depth + 1;
+ orderedNodes.addFirst(child);
+ }
+
+ if (profileNode.nodeId == LProfileGraph.ROOT_NODE) {
+ // don't display root
+ continue;
+ }
+
+ final boolean noParent = profileNode.parent == null || profileNode.parent.nodeId == LProfileGraph.ROOT_NODE;
+
+ final long parentTime = noParent ? totalTime : profileNode.parent.totalTime;
+ final LProfilerRegistry.ProfilerEntry profilerEntry = profileNode.profiler;
+
+ // format:
+ // For profiler type:
+ // X% of total, Y% of parent, self A% of total, self B% of children, Dms raw sum
+ // For counter type:
+ // # avg X sum Y
+ builder.setLength(0);
+ // prepare indent
+ final char[] indent = INDENT_PATTERNS[ret.size() % INDENT_PATTERNS.length];
+ for (int i = 0; i < depth; ++i) {
+ builder.append(indent);
+ }
+
+ switch (profilerEntry.type()) {
+ case TIMER: {
+ ret.add(
+ builder
+ .append(profilerEntry.name())
+ .append(' ')
+ .append(THREE_DECIMAL_PLACES.get().format(((double)profileNode.totalTime / (double)totalTime) * 100.0))
+ .append("% of total, ")
+ .append(THREE_DECIMAL_PLACES.get().format(((double)profileNode.totalTime / (double)parentTime) * 100.0))
+ .append("% of parent, self ")
+ .append(THREE_DECIMAL_PLACES.get().format(((double)(profileNode.totalTime - profileNode.childrenTimingCount) / (double)totalTime) * 100.0))
+ .append("% of total, self ")
+ .append(THREE_DECIMAL_PLACES.get().format(((double)(profileNode.totalTime - profileNode.childrenTimingCount) / (double)profileNode.totalTime) * 100.0))
+ .append("% of children, ")
+ .append(THREE_DECIMAL_PLACES.get().format((double)profileNode.totalTime / 1.0E6))
+ .append("ms raw sum")
+ .toString()
+ );
+ break;
+ }
+ case COUNTER: {
+ ret.add(
+ builder
+ .append('#')
+ .append(profilerEntry.name())
+ .append(" avg ")
+ .append(THREE_DECIMAL_PLACES.get().format((double)profileNode.totalCount / (double)(noParent ? 1L : profileNode.parent.totalCount)))
+ .append(" sum ")
+ .append(NO_DECIMAL_PLACES.get().format(profileNode.totalCount))
+ .toString()
+ );
+ break;
+ }
+ default: {
+ throw new IllegalStateException("Unknown type " + profilerEntry.type());
+ }
+ }
+ }
+
+ return ret;
+ }
+
+ private static final class ProfileNode {
+
+ public final ProfileNode parent;
+ public final int nodeId;
+ public final LProfilerRegistry.ProfilerEntry profiler;
+ public final long totalTime;
+ public final long totalCount;
+ public final List children = new ArrayList<>();
+ public long childrenTimingCount;
+ public int depth = -1;
+
+ private ProfileNode(final ProfileNode parent, final int nodeId, final LProfilerRegistry.ProfilerEntry profiler,
+ final long totalTime, final long totalCount) {
+ this.parent = parent;
+ this.nodeId = nodeId;
+ this.profiler = profiler;
+ this.totalTime = totalTime;
+ this.totalCount = totalCount;
+ }
+ }
+
+ /*
+ public static void main(final String[] args) throws Throwable {
+ final Thread timerHack = new Thread("Timer hack thread") {
+ @Override
+ public void run() {
+ for (;;) {
+ try {
+ Thread.sleep(Long.MAX_VALUE);
+ } catch (final InterruptedException ex) {
+ continue;
+ }
+ }
+ }
+ };
+ timerHack.setDaemon(true);
+ timerHack.start();
+
+ final LProfilerRegistry registry = new LProfilerRegistry();
+
+ final int tickId = registry.createType(LProfilerRegistry.ProfileType.TIMER, "tick");
+ final int entityTickId = registry.createType(LProfilerRegistry.ProfileType.TIMER, "entity tick");
+ final int getEntitiesId = registry.createType(LProfilerRegistry.ProfileType.COUNTER, "getEntities call");
+ final int tileEntityId = registry.createType(LProfilerRegistry.ProfileType.TIMER, "tile entity tick");
+ final int creeperEntityId = registry.createType(LProfilerRegistry.ProfileType.TIMER, "creeper entity tick");
+ final int furnaceId = registry.createType(LProfilerRegistry.ProfileType.TIMER, "furnace tile entity tick");
+
+ final LeafProfiler profiler = new LeafProfiler(registry, new LProfileGraph());
+
+ profiler.startTimer(tickId, System.nanoTime());
+ Thread.sleep(10L);
+
+ profiler.startTimer(entityTickId, System.nanoTime());
+ Thread.sleep(1L);
+
+ profiler.startTimer(creeperEntityId, System.nanoTime());
+ Thread.sleep(15L);
+ profiler.incrementCounter(getEntitiesId, 50L);
+ profiler.stopTimer(creeperEntityId, System.nanoTime());
+
+ profiler.stopTimer(entityTickId, System.nanoTime());
+
+ profiler.startTimer(tileEntityId, System.nanoTime());
+ Thread.sleep(1L);
+
+ profiler.startTimer(furnaceId, System.nanoTime());
+ Thread.sleep(20L);
+ profiler.stopTimer(furnaceId, System.nanoTime());
+
+ profiler.stopTimer(tileEntityId, System.nanoTime());
+
+ profiler.stopTimer(tickId, System.nanoTime());
+
+ System.out.println("Done.");
+ }
+ */
+}
diff --git a/src/main/java/com/destroystokyo/paper/util/RedstoneWireTurbo.java b/src/main/java/com/destroystokyo/paper/util/RedstoneWireTurbo.java
index 22a2547810d0c029f29685faddf7ac21cde2df0b..e36b4053eb2676e934b8c9c401bf58cfa7dd969c 100644
--- a/src/main/java/com/destroystokyo/paper/util/RedstoneWireTurbo.java
+++ b/src/main/java/com/destroystokyo/paper/util/RedstoneWireTurbo.java
@@ -832,14 +832,14 @@ public class RedstoneWireTurbo {
j = getMaxCurrentStrength(upd, j);
int l = 0;
- wire.shouldSignal = false;
+ io.papermc.paper.threadedregions.TickRegionScheduler.getCurrentRegionizedWorldData().shouldSignal = false; // Folia - region threading
// Unfortunately, World.isBlockIndirectlyGettingPowered is complicated,
// and I'm not ready to try to replicate even more functionality from
// elsewhere in Minecraft into this accelerator. So sadly, we must
// suffer the performance hit of this very expensive call. If there
// is consistency to what this call returns, we may be able to cache it.
final int k = worldIn.getBestNeighborSignal(upd.self);
- wire.shouldSignal = true;
+ io.papermc.paper.threadedregions.TickRegionScheduler.getCurrentRegionizedWorldData().shouldSignal = true; // Folia - region threading
// The variable 'k' holds the maximum redstone power value of any adjacent blocks.
// If 'k' has the highest level of all neighbors, then the power level of this
diff --git a/src/main/java/io/papermc/paper/adventure/ChatProcessor.java b/src/main/java/io/papermc/paper/adventure/ChatProcessor.java
index 774fb97912f766589f3548f659618ad554e0503f..c44023a2f825507625a244ea8dfaa6073ed36806 100644
--- a/src/main/java/io/papermc/paper/adventure/ChatProcessor.java
+++ b/src/main/java/io/papermc/paper/adventure/ChatProcessor.java
@@ -98,7 +98,7 @@ public final class ChatProcessor {
final CraftPlayer player = this.player.getBukkitEntity();
final AsyncPlayerChatEvent ae = new AsyncPlayerChatEvent(this.async, player, this.craftbukkit$originalMessage, new LazyPlayerSet(this.server));
this.post(ae);
- if (listenersOnSyncEvent) {
+ if (false && listenersOnSyncEvent) { // Folia - region threading
final PlayerChatEvent se = new PlayerChatEvent(player, ae.getMessage(), ae.getFormat(), ae.getRecipients());
se.setCancelled(ae.isCancelled()); // propagate cancelled state
this.queueIfAsyncOrRunImmediately(new Waitable() {
@@ -178,7 +178,7 @@ public final class ChatProcessor {
ae.setCancelled(cancelled); // propagate cancelled state
this.post(ae);
final boolean listenersOnSyncEvent = canYouHearMe(ChatEvent.getHandlerList());
- if (listenersOnSyncEvent) {
+ if (false && listenersOnSyncEvent) { // Folia - region threading
this.queueIfAsyncOrRunImmediately(new Waitable() {
@Override
protected Void evaluate() {
diff --git a/src/main/java/io/papermc/paper/adventure/providers/ClickCallbackProviderImpl.java b/src/main/java/io/papermc/paper/adventure/providers/ClickCallbackProviderImpl.java
index 3c17001bcd3862a76a22df488bff80a0ff4d1b83..b2fffaa862df045bacb346f3cbe7eb963e104e47 100644
--- a/src/main/java/io/papermc/paper/adventure/providers/ClickCallbackProviderImpl.java
+++ b/src/main/java/io/papermc/paper/adventure/providers/ClickCallbackProviderImpl.java
@@ -23,35 +23,42 @@ public class ClickCallbackProviderImpl implements ClickCallback.Provider {
public static final class CallbackManager {
- private final Map callbacks = new HashMap<>();
- private final Queue queue = new ConcurrentLinkedQueue<>();
+ private final java.util.concurrent.ConcurrentHashMap callbacks = new java.util.concurrent.ConcurrentHashMap<>(); // Folia - region threading
+ // Folia - region threading
private CallbackManager() {
}
public UUID addCallback(final @NotNull ClickCallback callback, final ClickCallback.@NotNull Options options) {
final UUID id = UUID.randomUUID();
- this.queue.add(new StoredCallback(callback, options, id));
+ final StoredCallback scb = new StoredCallback(callback, options, id); // Folia - region threading
+ this.callbacks.put(scb.id(), scb); // Folia - region threading
return id;
}
public void handleQueue(final int currentTick) {
// Evict expired entries
if (currentTick % 100 == 0) {
- this.callbacks.values().removeIf(callback -> !callback.valid());
+ this.callbacks.values().removeIf(StoredCallback::expired); // Folia - region threading - don't read uses field
}
- // Add entries from queue
- StoredCallback callback;
- while ((callback = this.queue.poll()) != null) {
- this.callbacks.put(callback.id(), callback);
- }
+ // Folia - region threading
}
public void runCallback(final @NotNull Audience audience, final UUID id) {
- final StoredCallback callback = this.callbacks.get(id);
- if (callback != null && callback.valid()) { //TODO Message if expired/invalid?
- callback.takeUse();
+ // Folia start - region threading
+ final StoredCallback[] use = new StoredCallback[1];
+ this.callbacks.computeIfPresent(id, (final UUID keyInMap, final StoredCallback value) -> {
+ if (!value.valid()) {
+ return null;
+ }
+ use[0] = value;
+ value.takeUse();
+ return value.valid() ? value : null;
+ });
+ final StoredCallback callback = use[0];
+ if (callback != null) { //TODO Message if expired/invalid?
+ // Folia end - region threading
callback.callback.accept(audience);
}
}
diff --git a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java
index fccb8d7a99bef076838ebefa233f2f00a1364c30..e822f308315a955d00dcbedfc1b54d22b569c31e 100644
--- a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java
+++ b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java
@@ -92,6 +92,9 @@ public final class ChunkSystem {
for (int index = 0, len = chunkMap.regionManagers.size(); index < len; ++index) {
chunkMap.regionManagers.get(index).addChunk(holder.pos.x, holder.pos.z);
}
+ // Folia start - threaded regions
+ level.regioniser.addChunk(holder.pos.x, holder.pos.z);
+ // Folia end - threaded regions
}
public static void onChunkHolderDelete(final ServerLevel level, final ChunkHolder holder) {
@@ -99,30 +102,34 @@ public final class ChunkSystem {
for (int index = 0, len = chunkMap.regionManagers.size(); index < len; ++index) {
chunkMap.regionManagers.get(index).removeChunk(holder.pos.x, holder.pos.z);
}
+ // Folia start - threaded regions
+ level.regioniser.removeChunk(holder.pos.x, holder.pos.z);
+ // Folia end - threaded regions
}
public static void onChunkBorder(final LevelChunk chunk, final ChunkHolder holder) {
chunk.playerChunk = holder;
+ chunk.level.getCurrentWorldData().addChunk(chunk); // Folia - region threading
}
public static void onChunkNotBorder(final LevelChunk chunk, final ChunkHolder holder) {
-
+ chunk.level.getCurrentWorldData().removeChunk(chunk); // Folia - region threading
}
public static void onChunkTicking(final LevelChunk chunk, final ChunkHolder holder) {
- chunk.level.getChunkSource().tickingChunks.add(chunk);
+ // Folia - region threading
}
public static void onChunkNotTicking(final LevelChunk chunk, final ChunkHolder holder) {
- chunk.level.getChunkSource().tickingChunks.remove(chunk);
+ // Folia - region threading
}
public static void onChunkEntityTicking(final LevelChunk chunk, final ChunkHolder holder) {
- chunk.level.getChunkSource().entityTickingChunks.add(chunk);
+ chunk.level.getCurrentWorldData().addEntityTickingChunk(chunk); // Folia - region threading
}
public static void onChunkNotEntityTicking(final LevelChunk chunk, final ChunkHolder holder) {
- chunk.level.getChunkSource().entityTickingChunks.remove(chunk);
+ chunk.level.getCurrentWorldData().removeEntityTickingChunk(chunk); // Folia - region threading
}
public static ChunkHolder getUnloadingChunkHolder(final ServerLevel level, final int chunkX, final int chunkZ) {
diff --git a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
index 924539d4ac50c70178ba220424ffacd6ff277c8b..7b664f32868028758d0c6ee1eaa82efcd83661d2 100644
--- a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
+++ b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java
@@ -155,7 +155,7 @@ public class RegionizedPlayerChunkLoader {
final PlayerChunkLoaderData loader = player.chunkLoader;
if (loader == null) {
- return;
+ throw new IllegalStateException("Player is already removed from player chunk loader"); // Folia - region threading
}
loader.remove();
@@ -234,7 +234,7 @@ public class RegionizedPlayerChunkLoader {
public void tick() {
TickThread.ensureTickThread("Cannot tick player chunk loader async");
long currTime = System.nanoTime();
- for (final ServerPlayer player : new java.util.ArrayList<>(this.world.players())) {
+ for (final ServerPlayer player : new java.util.ArrayList<>(this.world.getLocalPlayers())) { // Folia - region threding
final PlayerChunkLoaderData loader = player.chunkLoader;
if (loader == null || loader.world != this.world) {
// not our problem anymore
diff --git a/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java
index 41791c7331c80d496cde4e3d1846a178bef0bbe3..a295f7a7c59f0a291aec4f9f1a08f6b2798689f6 100644
--- a/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java
+++ b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java
@@ -189,7 +189,12 @@ public final class EntityLookup implements LevelEntityGetter {
@Override
public Iterable getAll() {
- return new ArrayIterable<>(this.accessibleEntities.getRawData(), 0, this.accessibleEntities.size());
+ // Folia start - region threading
+ synchronized (this.accessibleEntities) {
+ Entity[] iterate = java.util.Arrays.copyOf(this.accessibleEntities.getRawData(), this.accessibleEntities.size());
+ return new ArrayIterable<>(iterate, 0, iterate.length);
+ }
+ // Folia end - region threading
}
public Entity[] getAllCopy() {
@@ -267,7 +272,9 @@ public final class EntityLookup implements LevelEntityGetter {
if (newVisibility.ordinal() > oldVisibility.ordinal()) {
// status upgrade
if (!oldVisibility.isAccessible() && newVisibility.isAccessible()) {
+ synchronized (this.accessibleEntities) { // Folia - region threading
this.accessibleEntities.add(entity);
+ } // Folia - region threading
EntityLookup.this.worldCallback.onTrackingStart(entity);
}
@@ -281,7 +288,9 @@ public final class EntityLookup implements LevelEntityGetter {
}
if (oldVisibility.isAccessible() && !newVisibility.isAccessible()) {
+ synchronized (this.accessibleEntities) { // Folia - region threading
this.accessibleEntities.remove(entity);
+ } // Folia - region threading
EntityLookup.this.worldCallback.onTrackingEnd(entity);
}
}
@@ -391,11 +400,26 @@ public final class EntityLookup implements LevelEntityGetter {
entity.setLevelCallback(new EntityCallback(entity));
+ this.world.getCurrentWorldData().addEntity(entity); // Folia - region threading
+
this.entityStatusChange(entity, slices, Visibility.HIDDEN, getEntityStatus(entity), false, !fromDisk, false);
return true;
}
+ // Folia start - region threading
+ // only appropriate to use when in shutdown, as this performs no logic hooks to properly add to world
+ public boolean addEntityForShutdownTeleportComplete(final Entity entity) {
+ final BlockPos pos = entity.blockPosition();
+ final int sectionX = pos.getX() >> 4;
+ final int sectionY = Mth.clamp(pos.getY() >> 4, this.minSection, this.maxSection);
+ final int sectionZ = pos.getZ() >> 4;
+ final ChunkEntitySlices slices = this.getOrCreateChunk(sectionX, sectionZ);
+
+ return slices.addEntity(entity, sectionY);
+ }
+ // Folia end - region threading
+
private void removeEntity(final Entity entity) {
final int sectionX = entity.sectionX;
final int sectionY = entity.sectionY;
@@ -413,6 +437,7 @@ public final class EntityLookup implements LevelEntityGetter {
LOGGER.warn("Failed to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ")");
}
}
+
entity.sectionX = entity.sectionY = entity.sectionZ = Integer.MIN_VALUE;
this.entityByLock.writeLock();
@@ -829,6 +854,9 @@ public final class EntityLookup implements LevelEntityGetter {
EntityLookup.this.entityStatusChange(entity, null, tickingState, Visibility.HIDDEN, false, false, reason.shouldDestroy());
this.entity.setLevelCallback(NoOpCallback.INSTANCE);
+
+ // only AFTER full removal callbacks, so that thread checking will work. // Folia - region threading
+ EntityLookup.this.world.getCurrentWorldData().removeEntity(entity); // Folia - region threading
}
}
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
index abd0217cf0bff183c8e262edc173a53403797c1a..40411b335e99f67d6a82e70db6e5e4c0372102ec 100644
--- a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
@@ -53,6 +53,14 @@ import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.locks.LockSupport;
import java.util.function.Predicate;
+// Folia start - region threading
+import io.papermc.paper.threadedregions.RegionizedServer;
+import io.papermc.paper.threadedregions.ThreadedRegionizer;
+import io.papermc.paper.threadedregions.TickRegionScheduler;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
+// Folia end - region threading
+
public final class ChunkHolderManager {
private static final Logger LOGGER = LogUtils.getClassLogger();
@@ -112,27 +120,92 @@ public final class ChunkHolderManager {
private final ChunkTaskScheduler taskScheduler;
private long currentTick;
- private final ArrayDeque pendingFullLoadUpdate = new ArrayDeque<>();
- private final ObjectRBTreeSet autoSaveQueue = new ObjectRBTreeSet<>((final NewChunkHolder c1, final NewChunkHolder c2) -> {
- if (c1 == c2) {
- return 0;
+ // Folia start - region threading
+ public static final class HolderManagerRegionData {
+ /*
+ * This region data is a bit of a mess, because it is part global state and part region state.
+ * Typically for region state we do not need to worry about threading concerns because it is only
+ * accessed by the current region when ticking. But since this contains state (
+ * tickets, and removeTickToChunkExpireTicketCount) that can be written to by any thread holding the
+ * ticket lock, the merge logic is complicated as merging only holds the region lock. So, Folia has modified
+ * the add and remove ticket functions to acquire the region lock if the current region does not own the target
+ * position.
+ */
+ private final ArrayDeque pendingFullLoadUpdate = new ArrayDeque<>();
+ private final ObjectRBTreeSet autoSaveQueue = new ObjectRBTreeSet<>((final NewChunkHolder c1, final NewChunkHolder c2) -> {
+ if (c1 == c2) {
+ return 0;
+ }
+
+ final int saveTickCompare = Long.compare(c1.lastAutoSave, c2.lastAutoSave);
+
+ if (saveTickCompare != 0) {
+ return saveTickCompare;
+ }
+
+ final long coord1 = CoordinateUtils.getChunkKey(c1.chunkX, c1.chunkZ);
+ final long coord2 = CoordinateUtils.getChunkKey(c2.chunkX, c2.chunkZ);
+
+ if (coord1 == coord2) {
+ throw new IllegalStateException("Duplicate chunkholder in auto save queue");
+ }
+
+ return Long.compare(coord1, coord2);
+ });
+
+ public void merge(final HolderManagerRegionData into, final long tickOffset) {
+ // Order doesn't really matter for the pending full update...
+ into.pendingFullLoadUpdate.addAll(this.pendingFullLoadUpdate);
+
+ // We need to copy the set to iterate over, because modifying the field used in compareTo while iterating
+ // will destroy the result from compareTo (However, the set is not destroyed _after_ iteration because a constant
+ // addition to every entry will not affect compareTo).
+ for (final NewChunkHolder holder : new ArrayList<>(this.autoSaveQueue)) {
+ holder.lastAutoSave += tickOffset;
+ into.autoSaveQueue.add(holder);
+ }
}
- final int saveTickCompare = Long.compare(c1.lastAutoSave, c2.lastAutoSave);
+ public void split(final int chunkToRegionShift, final Long2ReferenceOpenHashMap regionToData,
+ final ReferenceOpenHashSet dataSet) {
+ for (final NewChunkHolder fullLoadUpdate : this.pendingFullLoadUpdate) {
+ final int regionCoordinateX = fullLoadUpdate.chunkX >> chunkToRegionShift;
+ final int regionCoordinateZ = fullLoadUpdate.chunkZ >> chunkToRegionShift;
- if (saveTickCompare != 0) {
- return saveTickCompare;
+ final HolderManagerRegionData data = regionToData.get(CoordinateUtils.getChunkKey(regionCoordinateX, regionCoordinateZ));
+ if (data != null) {
+ data.pendingFullLoadUpdate.add(fullLoadUpdate);
+ } // else: fullLoadUpdate is an unloaded chunk holder
+ }
+
+ for (final NewChunkHolder autoSave : this.autoSaveQueue) {
+ final int regionCoordinateX = autoSave.chunkX >> chunkToRegionShift;
+ final int regionCoordinateZ = autoSave.chunkZ >> chunkToRegionShift;
+
+ final HolderManagerRegionData data = regionToData.get(CoordinateUtils.getChunkKey(regionCoordinateX, regionCoordinateZ));
+ if (data != null) {
+ data.autoSaveQueue.add(autoSave);
+ } // else: autoSave is an unloaded chunk holder
+ }
}
+ }
- final long coord1 = CoordinateUtils.getChunkKey(c1.chunkX, c1.chunkZ);
- final long coord2 = CoordinateUtils.getChunkKey(c2.chunkX, c2.chunkZ);
+ private ChunkHolderManager.HolderManagerRegionData getCurrentRegionData() {
+ final ThreadedRegionizer.ThreadedRegion region =
+ TickRegionScheduler.getCurrentRegion();
- if (coord1 == coord2) {
- throw new IllegalStateException("Duplicate chunkholder in auto save queue");
+ if (region == null) {
+ return null;
}
- return Long.compare(coord1, coord2);
- });
+ if (this.world != null && this.world != region.getData().world) {
+ throw new IllegalStateException("World check failed: expected world: " + this.world.getWorld().getKey() + ", region world: " + region.getData().world.getWorld().getKey());
+ }
+
+ return region.getData().getHolderManagerRegionData();
+ }
+ // Folia end - region threading
+
public ChunkHolderManager(final ServerLevel world, final ChunkTaskScheduler taskScheduler) {
this.world = world;
@@ -166,8 +239,13 @@ public final class ChunkHolderManager {
}
public void close(final boolean save, final boolean halt) {
+ // Folia start - region threading
+ this.close(save, halt, true, true, true);
+ }
+ public void close(final boolean save, final boolean halt, final boolean first, final boolean last, final boolean checkRegions) {
+ // Folia end - region threading
TickThread.ensureTickThread("Closing world off-main");
- if (halt) {
+ if (first && halt) { // Folia - region threading
LOGGER.info("Waiting 60s for chunk system to halt for world '" + this.world.getWorld().getName() + "'");
if (!this.taskScheduler.halt(true, TimeUnit.SECONDS.toNanos(60L))) {
LOGGER.warn("Failed to halt world generation/loading tasks for world '" + this.world.getWorld().getName() + "'");
@@ -177,9 +255,10 @@ public final class ChunkHolderManager {
}
if (save) {
- this.saveAllChunks(true, true, true);
+ this.saveAllChunksRegionised(true, true, true, first, last, checkRegions); // Folia - region threading
}
+ if (last) { // Folia - region threading
if (this.world.chunkDataControllerNew.hasTasks() || this.world.entityDataControllerNew.hasTasks() || this.world.poiDataControllerNew.hasTasks()) {
RegionFileIOThread.flush();
}
@@ -200,27 +279,34 @@ public final class ChunkHolderManager {
} catch (final IOException ex) {
LOGGER.error("Failed to close poi regionfile cache for world '" + this.world.getWorld().getName() + "'", ex);
}
+ } // Folia - region threading
}
void ensureInAutosave(final NewChunkHolder holder) {
- if (!this.autoSaveQueue.contains(holder)) {
- holder.lastAutoSave = MinecraftServer.currentTick;
- this.autoSaveQueue.add(holder);
+ // Folia start - region threading
+ final HolderManagerRegionData regionData = this.getCurrentRegionData();
+ if (!regionData.autoSaveQueue.contains(holder)) {
+ holder.lastAutoSave = RegionizedServer.getCurrentTick();
+ // Folia end - region threading
+ regionData.autoSaveQueue.add(holder);
}
}
public void autoSave() {
final List reschedule = new ArrayList<>();
- final long currentTick = MinecraftServer.currentTickLong;
+ final long currentTick = RegionizedServer.getCurrentTick(); // Folia - region threading
final long maxSaveTime = currentTick - this.world.paperConfig().chunks.autoSaveInterval.value();
- for (int autoSaved = 0; autoSaved < this.world.paperConfig().chunks.maxAutoSaveChunksPerTick && !this.autoSaveQueue.isEmpty();) {
- final NewChunkHolder holder = this.autoSaveQueue.first();
+ // Folia start - region threading
+ final HolderManagerRegionData regionData = this.getCurrentRegionData();
+ for (int autoSaved = 0; autoSaved < this.world.paperConfig().chunks.maxAutoSaveChunksPerTick && !regionData.autoSaveQueue.isEmpty();) {
+ // Folia end - region threading
+ final NewChunkHolder holder = regionData.autoSaveQueue.first();
if (holder.lastAutoSave > maxSaveTime) {
break;
}
- this.autoSaveQueue.remove(holder);
+ regionData.autoSaveQueue.remove(holder); // Folia - region threading
holder.lastAutoSave = currentTick;
if (holder.save(false, false) != null) {
@@ -234,15 +320,38 @@ public final class ChunkHolderManager {
for (final NewChunkHolder holder : reschedule) {
if (holder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)) {
- this.autoSaveQueue.add(holder);
+ regionData.autoSaveQueue.add(holder); // Folia start - region threading
}
}
}
public void saveAllChunks(final boolean flush, final boolean shutdown, final boolean logProgress) {
- final List holders = this.getChunkHolders();
+ // Folia start - region threading
+ this.saveAllChunksRegionised(flush, shutdown, logProgress, true, true, true);
+ }
+ public void saveAllChunksRegionised(final boolean flush, final boolean shutdown, final boolean logProgress, final boolean first, final boolean last, final boolean checkRegion) {
+ final List holders = new java.util.ArrayList<>(this.chunkHolders.size() / 10);
+ // we could iterate through all chunk holders with thread checks, however for many regions the iteration cost alone
+ // will multiply. to avoid this, we can simply iterate through all owned sections
+ final int regionShift = io.papermc.paper.threadedregions.TickRegionScheduler.getCurrentRegion().regioniser.sectionChunkShift;
+ for (final LongIterator iterator = io.papermc.paper.threadedregions.TickRegionScheduler.getCurrentRegion().getOwnedSectionsUnsynchronised(); iterator.hasNext();) {
+ final long sectionKey = iterator.nextLong();
+ final int width = 1 << regionShift;
+ final int offsetX = CoordinateUtils.getChunkX(sectionKey) << regionShift;
+ final int offsetZ = CoordinateUtils.getChunkZ(sectionKey) << regionShift;
+
+ for (int dz = 0; dz < width; ++dz) {
+ for (int dx = 0; dx < width; ++dx) {
+ final NewChunkHolder holder = this.getChunkHolder(offsetX | dx, offsetZ | dz);
+ if (holder != null) {
+ holders.add(holder);
+ }
+ }
+ }
+ }
+ // Folia end - region threading
- if (logProgress) {
+ if (first && logProgress) { // Folia - region threading
LOGGER.info("Saving all chunkholders for world '" + this.world.getWorld().getName() + "'");
}
@@ -250,7 +359,7 @@ public final class ChunkHolderManager {
int saved = 0;
- long start = System.nanoTime();
+ final long start = System.nanoTime();
long lastLog = start;
boolean needsFlush = false;
final int flushInterval = 50;
@@ -261,6 +370,12 @@ public final class ChunkHolderManager {
for (int i = 0, len = holders.size(); i < len; ++i) {
final NewChunkHolder holder = holders.get(i);
+ // Folia start - region threading
+ if (!checkRegion && !TickThread.isTickThreadFor(this.world, holder.chunkX, holder.chunkZ)) {
+ // skip holders that would fail the thread check
+ continue;
+ }
+ // Folia end - region threading
try {
final NewChunkHolder.SaveStat saveStat = holder.save(shutdown, false);
if (saveStat != null) {
@@ -293,7 +408,7 @@ public final class ChunkHolderManager {
}
}
}
- if (flush) {
+ if (last && flush) { // Folia - region threading
RegionFileIOThread.flush();
if (this.world.paperConfig().chunks.flushRegionsOnSave) {
try {
@@ -706,6 +821,13 @@ public final class ChunkHolderManager {
}
public void tick() {
+ // Folia start - region threading
+ final ThreadedRegionizer.ThreadedRegion region =
+ TickRegionScheduler.getCurrentRegion();
+ if (region == null) {
+ throw new IllegalStateException("Not running tick() while on a region");
+ }
+ // Folia end - region threading
final int sectionShift = TickRegions.getRegionChunkShift();
final Predicate> expireNow = (final Ticket> ticket) -> {
@@ -715,12 +837,12 @@ public final class ChunkHolderManager {
return --ticket.removeDelay <= 0L;
};
- for (final Iterator iterator = this.sectionToChunkToExpireCount.keySet().iterator(); iterator.hasNext();) {
- final RegionFileIOThread.ChunkCoordinate section = iterator.next();
- final long sectionKey = section.key;
-
+ // Folia start - region threading
+ for (final LongIterator iterator = region.getOwnedSectionsUnsynchronised(); iterator.hasNext();) {
+ final long sectionKey = iterator.nextLong();
+ final RegionFileIOThread.ChunkCoordinate section = new RegionFileIOThread.ChunkCoordinate(sectionKey);
if (!this.sectionToChunkToExpireCount.containsKey(section)) {
- // removed concurrently
+ // Folia end - region threading
continue;
}
@@ -1023,19 +1145,51 @@ public final class ChunkHolderManager {
if (changedFullStatus.isEmpty()) {
return;
}
- if (!TickThread.isTickThread()) {
- this.taskScheduler.scheduleChunkTask(() -> {
- final ArrayDeque pendingFullLoadUpdate = ChunkHolderManager.this.pendingFullLoadUpdate;
- for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
- pendingFullLoadUpdate.add(changedFullStatus.get(i));
- }
- ChunkHolderManager.this.processPendingFullUpdate();
- }, PrioritisedExecutor.Priority.HIGHEST);
- } else {
- final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate;
- for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
- pendingFullLoadUpdate.add(changedFullStatus.get(i));
+ // Folia start - region threading
+ final Long2ObjectOpenHashMap> sectionToUpdates = new Long2ObjectOpenHashMap<>();
+ final List thisRegionHolders = new ArrayList<>();
+
+ final int regionShift = this.world.regioniser.sectionChunkShift;
+ final ThreadedRegionizer.ThreadedRegion thisRegion
+ = TickRegionScheduler.getCurrentRegion();
+
+ for (final NewChunkHolder holder : changedFullStatus) {
+ final int regionX = holder.chunkX >> regionShift;
+ final int regionZ = holder.chunkZ >> regionShift;
+ final long holderSectionKey = CoordinateUtils.getChunkKey(regionX, regionZ);
+
+ // region may be null
+ if (thisRegion != null && this.world.regioniser.getRegionAtUnsynchronised(holder.chunkX, holder.chunkZ) == thisRegion) {
+ thisRegionHolders.add(holder);
+ } else {
+ sectionToUpdates.computeIfAbsent(holderSectionKey, (final long keyInMap) -> {
+ return new ArrayList<>();
+ }).add(holder);
+ }
+ }
+ // Folia end - region threading
+
+ // Folia start - region threading
+ if (!thisRegionHolders.isEmpty()) {
+ thisRegion.getData().getHolderManagerRegionData().pendingFullLoadUpdate.addAll(thisRegionHolders);
+ }
+
+ if (!sectionToUpdates.isEmpty()) {
+ for (final Iterator>> iterator = sectionToUpdates.long2ObjectEntrySet().fastIterator();
+ iterator.hasNext();) {
+ final Long2ObjectMap.Entry> entry = iterator.next();
+ final long sectionKey = entry.getLongKey();
+
+ final int chunkX = CoordinateUtils.getChunkX(sectionKey) << regionShift;
+ final int chunkZ = CoordinateUtils.getChunkZ(sectionKey) << regionShift;
+
+ final List regionHolders = entry.getValue();
+ this.taskScheduler.scheduleChunkTaskEventually(chunkX, chunkZ, () -> { // Folia - region threading
+ ChunkHolderManager.this.getCurrentRegionData().pendingFullLoadUpdate.addAll(regionHolders);
+ ChunkHolderManager.this.processPendingFullUpdate();
+ }, PrioritisedExecutor.Priority.HIGHEST);
+ // Folia end - region threading
}
}
}
@@ -1043,8 +1197,9 @@ public final class ChunkHolderManager {
private void removeChunkHolder(final NewChunkHolder holder) {
holder.killed = true;
holder.vanillaChunkHolder.onChunkRemove();
- this.autoSaveQueue.remove(holder);
+ // Folia - region threading
ChunkSystem.onChunkHolderDelete(this.world, holder.vanillaChunkHolder);
+ this.getCurrentRegionData().autoSaveQueue.remove(holder); // Folia - region threading
synchronized (this.chunkHolders) {
this.chunkHolders.remove(CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ));
}
@@ -1058,7 +1213,7 @@ public final class ChunkHolderManager {
throw new IllegalStateException("Cannot unload chunks recursively");
}
final int sectionShift = this.unloadQueue.coordinateShift; // sectionShift <= lock shift
- final List unloadSectionsForRegion = this.unloadQueue.retrieveForAllRegions();
+ final List unloadSectionsForRegion = this.unloadQueue.retrieveForCurrentRegion(); // Folia - threaded regions
int unloadCountTentative = 0;
for (final ChunkQueue.SectionToUnload sectionRef : unloadSectionsForRegion) {
final ChunkQueue.UnloadSection section
@@ -1371,7 +1526,13 @@ public final class ChunkHolderManager {
// only call on tick thread
protected final boolean processPendingFullUpdate() {
- final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate;
+ // Folia start - region threading
+ final HolderManagerRegionData data = this.getCurrentRegionData();
+ if (data == null) {
+ return false;
+ }
+ final ArrayDeque pendingFullLoadUpdate = data.pendingFullLoadUpdate;
+ // Folia end - region threading
boolean ret = false;
@@ -1382,9 +1543,7 @@ public final class ChunkHolderManager {
ret |= holder.handleFullStatusChange(changedFullStatus);
if (!changedFullStatus.isEmpty()) {
- for (int i = 0, len = changedFullStatus.size(); i < len; ++i) {
- pendingFullLoadUpdate.add(changedFullStatus.get(i));
- }
+ this.addChangedStatuses(changedFullStatus); // Folia - region threading
changedFullStatus.clear();
}
}
@@ -1398,7 +1557,7 @@ public final class ChunkHolderManager {
private JsonObject getDebugJsonNoLock() {
final JsonObject ret = new JsonObject();
- ret.addProperty("current_tick", Long.valueOf(this.currentTick));
+ // Folia - region threading - move down
final JsonArray unloadQueue = new JsonArray();
ret.add("unload_queue", unloadQueue);
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java
index 4cc1b3ba6d093a9683dbd8b7fe76106ae391e019..47bbd5de5849bef5392e3783322a19de5b351beb 100644
--- a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java
@@ -1,5 +1,8 @@
package io.papermc.paper.chunk.system.scheduling;
+import io.papermc.paper.threadedregions.ThreadedRegionizer;
+import io.papermc.paper.threadedregions.TickRegionScheduler;
+import io.papermc.paper.threadedregions.TickRegions;
import it.unimi.dsi.fastutil.HashCommon;
import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet;
import java.util.ArrayList;
@@ -45,6 +48,39 @@ public final class ChunkQueue {
return ret;
}
+ // Folia start - threaded regions
+ public List retrieveForCurrentRegion() {
+ final ThreadedRegionizer.ThreadedRegion region =
+ TickRegionScheduler.getCurrentRegion();
+ final ThreadedRegionizer regionizer = region.regioniser;
+ final int shift = this.coordinateShift;
+
+ final List ret = new ArrayList<>();
+
+ for (final Map.Entry entry : this.unloadSections.entrySet()) {
+ final Coordinate coord = entry.getKey();
+ final long key = coord.key;
+ final UnloadSection section = entry.getValue();
+ final int sectionX = Coordinate.x(key);
+ final int sectionZ = Coordinate.z(key);
+ final int chunkX = sectionX << shift;
+ final int chunkZ = sectionZ << shift;
+
+ if (regionizer.getRegionAtUnsynchronised(chunkX, chunkZ) != region) {
+ continue;
+ }
+
+ ret.add(new SectionToUnload(sectionX, sectionZ, coord, section.order, section.chunks.size()));
+ }
+
+ ret.sort((final SectionToUnload s1, final SectionToUnload s2) -> {
+ return Long.compare(s1.order, s2.order);
+ });
+
+ return ret;
+ }
+ // Folia end - threaded regions
+
public UnloadSection getSectionUnsynchronized(final int sectionX, final int sectionZ) {
final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ));
return this.unloadSections.get(coordinate);
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java
index f975cb93716e137d973ff2f9011acdbef58859a2..b84bfc9513a13e365f2bd471b3c77058638d1384 100644
--- a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java
@@ -114,7 +114,7 @@ public final class ChunkTaskScheduler {
private final PrioritisedThreadPool.PrioritisedPoolExecutor radiusAwareGenExecutor;
public final PrioritisedThreadPool.PrioritisedPoolExecutor loadExecutor;
- private final PrioritisedThreadedTaskQueue mainThreadExecutor = new PrioritisedThreadedTaskQueue();
+ // Folia - regionised ticking
public final ChunkHolderManager chunkHolderManager;
@@ -191,7 +191,7 @@ public final class ChunkTaskScheduler {
// it must be >= ticket propagator section shift so that the ticket propagator can assume that owning a position implies owning
// the entire section
// we just take the max, as we want the smallest shift that satifies these properties
- private static final int LOCK_SHIFT = ThreadedTicketLevelPropagator.SECTION_SHIFT;
+ private static final int LOCK_SHIFT = Math.max(ThreadedTicketLevelPropagator.SECTION_SHIFT, io.papermc.paper.threadedregions.TickRegions.getRegionChunkShift()); // Folia - region threading
public static int getChunkSystemLockShift() {
return LOCK_SHIFT;
}
@@ -300,14 +300,13 @@ public final class ChunkTaskScheduler {
};
// this may not be good enough, specifically thanks to stupid ass plugins swallowing exceptions
- this.scheduleChunkTask(chunkX, chunkZ, crash, PrioritisedExecutor.Priority.BLOCKING);
+ this.scheduleChunkTaskEventually(chunkX, chunkZ, crash, PrioritisedExecutor.Priority.BLOCKING); // Folia - region threading
// so, make the main thread pick it up
MinecraftServer.chunkSystemCrash = new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException);
}
public boolean executeMainThreadTask() {
- TickThread.ensureTickThread("Cannot execute main thread task off-main");
- return this.mainThreadExecutor.executeTask();
+ throw new UnsupportedOperationException("Use regionised ticking hooks"); // Folia - regionised ticking
}
public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) {
@@ -327,7 +326,7 @@ public final class ChunkTaskScheduler {
public void scheduleTickingState(final int chunkX, final int chunkZ, final FullChunkStatus toStatus,
final boolean addTicket, final PrioritisedExecutor.Priority priority,
final Consumer onComplete) {
- if (!TickThread.isTickThread()) {
+ if (!TickThread.isTickThreadFor(this.world, chunkX, chunkZ)) {
this.scheduleChunkTask(chunkX, chunkZ, () -> {
ChunkTaskScheduler.this.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
}, priority);
@@ -483,7 +482,7 @@ public final class ChunkTaskScheduler {
public void scheduleChunkLoad(final int chunkX, final int chunkZ, final ChunkStatus toStatus, final boolean addTicket,
final PrioritisedExecutor.Priority priority, final Consumer onComplete) {
- if (!TickThread.isTickThread()) {
+ if (!TickThread.isTickThreadFor(this.world, chunkX, chunkZ)) {
this.scheduleChunkTask(chunkX, chunkZ, () -> {
ChunkTaskScheduler.this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete);
}, priority);
@@ -511,7 +510,7 @@ public final class ChunkTaskScheduler {
this.chunkHolderManager.processTicketUpdates();
}
- final Consumer loadCallback = (final ChunkAccess chunk) -> {
+ final Consumer loadCallback = onComplete == null && !addTicket ? null : (final ChunkAccess chunk) -> {
try {
if (onComplete != null) {
onComplete.accept(chunk);
@@ -551,7 +550,9 @@ public final class ChunkTaskScheduler {
if (!chunkHolder.upgradeGenTarget(toStatus)) {
this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks);
}
- chunkHolder.addStatusConsumer(toStatus, loadCallback);
+ if (loadCallback != null) {
+ chunkHolder.addStatusConsumer(toStatus, loadCallback);
+ }
}
}
} finally {
@@ -565,7 +566,7 @@ public final class ChunkTaskScheduler {
tasks.get(i).schedule();
}
- if (!scheduled) {
+ if (loadCallback != null && !scheduled) {
// couldn't schedule
try {
loadCallback.accept(chunk);
@@ -754,7 +755,7 @@ public final class ChunkTaskScheduler {
*/
@Deprecated
public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run) {
- return this.scheduleChunkTask(run, PrioritisedExecutor.Priority.NORMAL);
+ throw new UnsupportedOperationException(); // Folia - regionised ticking
}
/**
@@ -762,7 +763,7 @@ public final class ChunkTaskScheduler {
*/
@Deprecated
public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run, final PrioritisedExecutor.Priority priority) {
- return this.mainThreadExecutor.queueRunnable(run, priority);
+ throw new UnsupportedOperationException(); // Folia - regionised ticking
}
public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run) {
@@ -771,28 +772,33 @@ public final class ChunkTaskScheduler {
public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run,
final PrioritisedExecutor.Priority priority) {
- return this.mainThreadExecutor.createTask(run, priority);
+ return MinecraftServer.getServer().regionizedServer.taskQueue.createChunkTask(this.world, chunkX, chunkZ, run, priority); // Folia - regionised ticking
}
public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run) {
- return this.mainThreadExecutor.queueRunnable(run);
+ return this.scheduleChunkTask(chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL); // TODO rebase into chunk system patch
}
public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run,
final PrioritisedExecutor.Priority priority) {
- return this.mainThreadExecutor.queueRunnable(run, priority);
+ return MinecraftServer.getServer().regionizedServer.taskQueue.queueChunkTask(this.world, chunkX, chunkZ, run, priority); // Folia - regionised ticking
+ }
+
+ // Folia start - region threading
+ // this function is guaranteed to never touch the ticket lock or schedule lock
+ // yes, this IS a hack so that we can avoid deadlock due to region threading introducing the
+ // ticket lock in the schedule logic
+ public PrioritisedExecutor.PrioritisedTask scheduleChunkTaskEventually(final int chunkX, final int chunkZ, final Runnable run,
+ final PrioritisedExecutor.Priority priority) {
+ final PrioritisedExecutor.PrioritisedTask ret = this.createChunkTask(chunkX, chunkZ, run, priority);
+ this.world.taskQueueRegionData.pushGlobalChunkTask(() -> {
+ MinecraftServer.getServer().regionizedServer.taskQueue.queueChunkTask(ChunkTaskScheduler.this.world, chunkX, chunkZ, run, priority);
+ });
+ return ret;
}
+ // Folia end - region threading
- public void executeTasksUntil(final BooleanSupplier exit) {
- if (Bukkit.isPrimaryThread()) {
- this.mainThreadExecutor.executeConditionally(exit);
- } else {
- long counter = 1L;
- while (!exit.getAsBoolean()) {
- counter = ConcurrentUtil.linearLongBackoff(counter, 100_000L, 5_000_000L); // 100us, 5ms
- }
- }
- }
+ // Folia - regionised ticking
public boolean halt(final boolean sync, final long maxWaitNS) {
this.radiusAwareGenExecutor.halt();
@@ -800,6 +806,7 @@ public final class ChunkTaskScheduler {
this.loadExecutor.halt();
final long time = System.nanoTime();
if (sync) {
+ // start at 10 * 0.5ms -> 5ms
for (long failures = 9L;; failures = ConcurrentUtil.linearLongBackoff(failures, 500_000L, 50_000_000L)) {
if (
!this.radiusAwareGenExecutor.isActive() &&
diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java
index 51304c5cf4b0ac7646693ef97ef4a3847d3342b5..f1c68d9850ece7532a8607db955eaa4fc3a4bf05 100644
--- a/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java
+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java
@@ -726,7 +726,7 @@ public final class NewChunkHolder {
boolean killed;
// must hold scheduling lock
- private void checkUnload() {
+ void checkUnload() { // Folia - region threading
if (this.killed) {
return;
}
@@ -1440,7 +1440,7 @@ public final class NewChunkHolder {
}
// must be scheduled to main, we do not trust the callback to not do anything stupid
- this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> {
+ this.scheduler.scheduleChunkTaskEventually(this.chunkX, this.chunkZ, () -> { // Folia - region threading
for (final Consumer consumer : consumers) {
try {
consumer.accept(chunk);
@@ -1483,7 +1483,7 @@ public final class NewChunkHolder {
}
// must be scheduled to main, we do not trust the callback to not do anything stupid
- this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> {
+ this.scheduler.scheduleChunkTaskEventually(this.chunkX, this.chunkZ, () -> { // Folia - region threading
for (final Consumer consumer : consumers) {
try {
consumer.accept(chunk);
@@ -1744,7 +1744,7 @@ public final class NewChunkHolder {
return this.entityChunk;
}
- public long lastAutoSave;
+ public long lastAutoSave; // Folia - region threaded - change to relative delay
public static final record SaveStat(boolean savedChunk, boolean savedEntityChunk, boolean savedPoiChunk) {}
@@ -1894,7 +1894,7 @@ public final class NewChunkHolder {
} catch (final ThreadDeath death) {
throw death;
} catch (final Throwable thr) {
- LOGGER.error("Failed to save chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ LOGGER.error("Failed to save chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr); // TODO rebase
if (unloading && !completing) {
this.completeAsyncChunkDataSave(null);
}
@@ -1942,7 +1942,7 @@ public final class NewChunkHolder {
} catch (final ThreadDeath death) {
throw death;
} catch (final Throwable thr) {
- LOGGER.error("Failed to save entity data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ LOGGER.error("Failed to save entity data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr); // TODO rebase
}
return true;
@@ -1968,7 +1968,7 @@ public final class NewChunkHolder {
} catch (final ThreadDeath death) {
throw death;
} catch (final Throwable thr) {
- LOGGER.error("Failed to save poi data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'");
+ LOGGER.error("Failed to save poi data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr); // TODO rebase
}
return true;
diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java
index 7ba60b4b4f29a42c58d98aafc5ea0fa3214f554c..dc1820e1231c15a7244883731a86f04fa8d20aa1 100644
--- a/src/main/java/io/papermc/paper/command/PaperCommand.java
+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java
@@ -43,7 +43,7 @@ public final class PaperCommand extends Command {
commands.put(Set.of("debug", "chunkinfo", "holderinfo"), new ChunkDebugCommand());
commands.put(Set.of("syncloadinfo"), new SyncLoadInfoCommand());
commands.put(Set.of("dumpitem"), new DumpItemCommand());
- commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand());
+ commands.put(Set.of("mobcaps"), new MobcapsCommand()); // Folia - region threading - revert per player mob caps
commands.put(Set.of("dumplisteners"), new DumpListenersCommand());
return commands.entrySet().stream()
diff --git a/src/main/java/io/papermc/paper/command/PaperCommands.java b/src/main/java/io/papermc/paper/command/PaperCommands.java
index bbb8b1933ef33a3b91f69545f69dd3cfb84b27f5..b23b76a598731da8feef53c370b341233afdbea7 100644
--- a/src/main/java/io/papermc/paper/command/PaperCommands.java
+++ b/src/main/java/io/papermc/paper/command/PaperCommands.java
@@ -17,7 +17,7 @@ public final class PaperCommands {
private static final Map COMMANDS = new HashMap<>();
static {
COMMANDS.put("paper", new PaperCommand("paper"));
- COMMANDS.put("mspt", new MSPTCommand("mspt"));
+ COMMANDS.put("tps", new io.papermc.paper.threadedregions.commands.CommandServerHealth()); // Folia - region threading
}
public static void registerCommands(final MinecraftServer server) {
diff --git a/src/main/java/io/papermc/paper/command/subcommands/EntityCommand.java b/src/main/java/io/papermc/paper/command/subcommands/EntityCommand.java
index 5f43aedc6596e2b1ac7af9711515714752c262e3..e71265c6f248a909aa3017a3cceacb8c0850d6e2 100644
--- a/src/main/java/io/papermc/paper/command/subcommands/EntityCommand.java
+++ b/src/main/java/io/papermc/paper/command/subcommands/EntityCommand.java
@@ -129,7 +129,7 @@ public final class EntityCommand implements PaperSubcommand {
final int z = (e.getKey().z << 4) + 8;
final Component message = text(" " + e.getValue() + ": " + e.getKey().x + ", " + e.getKey().z + (chunkProviderServer.isPositionTicking(e.getKey().toLong()) ? " (Ticking)" : " (Non-Ticking)"))
.hoverEvent(HoverEvent.showText(text("Click to teleport to chunk", GREEN)))
- .clickEvent(ClickEvent.clickEvent(ClickEvent.Action.RUN_COMMAND, "/minecraft:execute as @s in " + world.getWorld().getKey() + " run tp " + x + " " + (world.getWorld().getHighestBlockYAt(x, z, HeightMap.MOTION_BLOCKING) + 1) + " " + z));
+ .clickEvent(ClickEvent.clickEvent(ClickEvent.Action.RUN_COMMAND, "/minecraft:execute as @s in " + world.getWorld().getKey() + " run tp " + x + " " + (128) + " " + z)); // Folia - region threading - avoid sync load here
sender.sendMessage(message);
});
} else {
diff --git a/src/main/java/io/papermc/paper/command/subcommands/HeapDumpCommand.java b/src/main/java/io/papermc/paper/command/subcommands/HeapDumpCommand.java
index cd2e4d792e972b8bf1e07b8961594a670ae949cf..3ab8dbf2768a4ef8fb53af6f5431f7f6afe6d168 100644
--- a/src/main/java/io/papermc/paper/command/subcommands/HeapDumpCommand.java
+++ b/src/main/java/io/papermc/paper/command/subcommands/HeapDumpCommand.java
@@ -18,7 +18,9 @@ import static net.kyori.adventure.text.format.NamedTextColor.YELLOW;
public final class HeapDumpCommand implements PaperSubcommand {
@Override
public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
+ io.papermc.paper.threadedregions.RegionizedServer.getInstance().addTask(() -> { // Folia - region threading
this.dumpHeap(sender);
+ }); // Folia - region threading
return true;
}
diff --git a/src/main/java/io/papermc/paper/command/subcommands/MobcapsCommand.java b/src/main/java/io/papermc/paper/command/subcommands/MobcapsCommand.java
index d3b39d88a72ca25057fd8574d32f28db0d420818..41aaa709dc2e474f23e759ebc51f33021c4f5485 100644
--- a/src/main/java/io/papermc/paper/command/subcommands/MobcapsCommand.java
+++ b/src/main/java/io/papermc/paper/command/subcommands/MobcapsCommand.java
@@ -46,7 +46,7 @@ public final class MobcapsCommand implements PaperSubcommand {
public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
switch (subCommand) {
case "mobcaps" -> this.printMobcaps(sender, args);
- case "playermobcaps" -> this.printPlayerMobcaps(sender, args);
+ //case "playermobcaps" -> this.printPlayerMobcaps(sender, args); // Folia - region threading - revert per player mob caps
}
return true;
}
@@ -55,7 +55,7 @@ public final class MobcapsCommand implements PaperSubcommand {
public List tabComplete(final CommandSender sender, final String subCommand, final String[] args) {
return switch (subCommand) {
case "mobcaps" -> CommandUtil.getListMatchingLast(sender, args, this.suggestMobcaps(args));
- case "playermobcaps" -> CommandUtil.getListMatchingLast(sender, args, this.suggestPlayerMobcaps(sender, args));
+ //case "playermobcaps" -> CommandUtil.getListMatchingLast(sender, args, this.suggestPlayerMobcaps(sender, args)); // Folia - region threading - revert per player mob caps
default -> throw new IllegalArgumentException();
};
}
@@ -140,41 +140,7 @@ public final class MobcapsCommand implements PaperSubcommand {
}
}
- private void printPlayerMobcaps(final CommandSender sender, final String[] args) {
- final @Nullable Player player;
- if (args.length == 0) {
- if (sender instanceof Player pl) {
- player = pl;
- } else {
- sender.sendMessage(Component.text("Must specify a player! ex: '/paper playermobcount playerName'", NamedTextColor.RED));
- return;
- }
- } else if (args.length == 1) {
- final String input = args[0];
- player = Bukkit.getPlayerExact(input);
- if (player == null) {
- sender.sendMessage(Component.text("Could not find player named '" + input + "'", NamedTextColor.RED));
- return;
- }
- } else {
- sender.sendMessage(Component.text("Too many arguments!", NamedTextColor.RED));
- return;
- }
-
- final ServerPlayer serverPlayer = ((CraftPlayer) player).getHandle();
- final ServerLevel level = serverPlayer.serverLevel();
-
- if (!level.paperConfig().entities.spawning.perPlayerMobSpawns) {
- sender.sendMessage(Component.text("Use '/paper mobcaps' for worlds where per-player mob spawning is disabled.", NamedTextColor.RED));
- return;
- }
-
- sender.sendMessage(Component.join(JoinConfiguration.noSeparators(), Component.text("Mobcaps for player: "), Component.text(player.getName(), NamedTextColor.GREEN)));
- sender.sendMessage(createMobcapsComponent(
- category -> level.chunkSource.chunkMap.getMobCountNear(serverPlayer, category),
- category -> level.getWorld().getSpawnLimitUnsafe(org.bukkit.craftbukkit.util.CraftSpawnCategory.toBukkit(category))
- ));
- }
+ // Folia - region threading - revert per player mob caps
private static Component createMobcapsComponent(final ToIntFunction countGetter, final ToIntFunction limitGetter) {
return MOB_CATEGORY_COLORS.entrySet().stream()
diff --git a/src/main/java/io/papermc/paper/command/subcommands/ReloadCommand.java b/src/main/java/io/papermc/paper/command/subcommands/ReloadCommand.java
index bd68139ae635f2ad7ec8e7a21e0056a139c4c62e..48a43341b17247355a531164019d5cc9c5555f26 100644
--- a/src/main/java/io/papermc/paper/command/subcommands/ReloadCommand.java
+++ b/src/main/java/io/papermc/paper/command/subcommands/ReloadCommand.java
@@ -16,7 +16,9 @@ import static net.kyori.adventure.text.format.NamedTextColor.RED;
public final class ReloadCommand implements PaperSubcommand {
@Override
public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
+ io.papermc.paper.threadedregions.RegionizedServer.getInstance().addTask(() -> { // Folia - region threading
this.doReload(sender);
+ }); // Folia - region threading
return true;
}
diff --git a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
index 4ac3fa45cd155ae8a852e26d4d4d1f16b28efdc2..6b495ac21a8ad4a810997c10cdf528e1762fabc1 100644
--- a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
+++ b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
@@ -279,6 +279,19 @@ public class GlobalConfiguration extends ConfigurationPart {
public boolean disableTripwireUpdates = false;
}
+ // Folia start - threaded regions
+ public ThreadedRegions threadedRegions;
+ public class ThreadedRegions extends Post {
+
+ public int threads = -1;
+
+ @Override
+ public void postProcess() {
+ io.papermc.paper.threadedregions.TickRegions.init(this);
+ }
+ }
+ // Folia end - threaded regions
+
public ChunkLoadingBasic chunkLoadingBasic;
public class ChunkLoadingBasic extends ConfigurationPart {
diff --git a/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java b/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java
index a33de97340f14219291c4175e9194914cdf441db..a00201eca053ef69b8d903fdb9538444baf85465 100644
--- a/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java
+++ b/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java
@@ -134,7 +134,7 @@ public class WorldConfiguration extends ConfigurationPart {
public boolean filterBadTileEntityNbtFromFallingBlocks = true;
public List filteredEntityTagNbtPaths = NbtPathSerializer.fromString(List.of("Pos", "Motion", "SleepingX", "SleepingY", "SleepingZ"));
public boolean disableMobSpawnerSpawnEggTransformation = false;
- public boolean perPlayerMobSpawns = true;
+ //public boolean perPlayerMobSpawns = true; // Folia - region threading - revert per player mob caps
public boolean scanForLegacyEnderDragon = true;
@MergeMap
public Reference2IntMap spawnLimits = Util.make(new Reference2IntOpenHashMap<>(NaturalSpawner.SPAWNING_CATEGORIES.length), map -> Arrays.stream(NaturalSpawner.SPAWNING_CATEGORIES).forEach(mobCategory -> map.put(mobCategory, -1)));
@@ -411,7 +411,14 @@ public class WorldConfiguration extends ConfigurationPart {
public Chunks chunks;
- public class Chunks extends ConfigurationPart {
+ // Folia start - region threading - force prevent moving into unloaded chunks
+ public class Chunks extends Post {
+ @Override
+ public void postProcess() {
+ this.preventMovingIntoUnloadedChunks = true;
+ }
+ // Folia end - region threading - force prevent moving into unloaded chunks
+
public AutosavePeriod autoSaveInterval = AutosavePeriod.def();
public int maxAutoSaveChunksPerTick = 24;
public int fixedChunkInhabitedTime = -1;
diff --git a/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java b/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
index 9c7552968b8c017c71a7a77557a66a03ed89f125..3b5572662c53715cd63772db90904dd1bed32390 100644
--- a/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
+++ b/src/main/java/io/papermc/paper/plugin/manager/PaperPluginInstanceManager.java
@@ -240,10 +240,19 @@ class PaperPluginInstanceManager {
+ pluginName + " (Is it up to date?)", ex, plugin); // Paper
}
+ // Folia start - region threading
try {
- this.server.getScheduler().cancelTasks(plugin);
+ this.server.getGlobalRegionScheduler().cancelTasks(plugin);
} catch (Throwable ex) {
- this.handlePluginException("Error occurred (in the plugin loader) while cancelling tasks for "
+ this.handlePluginException("Error occurred (in the plugin loader) while cancelling global tasks for "
+ + pluginName + " (Is it up to date?)", ex, plugin); // Paper
+ }
+ // Folia end - region threading
+
+ try {
+ this.server.getAsyncScheduler().cancelTasks(plugin); // Folia - region threading
+ } catch (Throwable ex) {
+ this.handlePluginException("Error occurred (in the plugin loader) while cancelling async tasks for " // Folia - region threading
+ pluginName + " (Is it up to date?)", ex, plugin); // Paper
}
diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionShutdownThread.java b/src/main/java/io/papermc/paper/threadedregions/RegionShutdownThread.java
new file mode 100644
index 0000000000000000000000000000000000000000..2b48833023771fa965f131890ade98e9da3f5976
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionShutdownThread.java
@@ -0,0 +1,175 @@
+package io.papermc.paper.threadedregions;
+
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.TickThread;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.ChunkPos;
+import org.slf4j.Logger;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+public final class RegionShutdownThread extends TickThread {
+
+ private static final Logger LOGGER = LogUtils.getClassLogger();
+
+ ThreadedRegionizer.ThreadedRegion shuttingDown;
+
+ public RegionShutdownThread(final String name) {
+ super(name);
+ this.setUncaughtExceptionHandler((thread, thr) -> {
+ LOGGER.error("Error shutting down server", thr);
+ });
+ }
+
+ static ThreadedRegionizer.ThreadedRegion getRegion() {
+ final Thread currentThread = Thread.currentThread();
+ if (currentThread instanceof RegionShutdownThread shutdownThread) {
+ return shutdownThread.shuttingDown;
+ }
+ return null;
+ }
+
+
+ static RegionizedWorldData getWorldData() {
+ final Thread currentThread = Thread.currentThread();
+ if (currentThread instanceof RegionShutdownThread shutdownThread) {
+ // no fast path for shutting down
+ if (shutdownThread.shuttingDown != null) {
+ return shutdownThread.shuttingDown.getData().world.worldRegionData.get();
+ }
+ }
+ return null;
+ }
+
+ // The region shutdown thread bypasses all tick thread checks, which will allow us to execute global saves
+ // it will not however let us perform arbitrary sync loads, arbitrary world state lookups simply because
+ // the data required to do that is regionised, and we can only access it when we OWN the region, and we do not.
+ // Thus, the only operation that the shutdown thread will perform
+
+ private void saveLevelData(final ServerLevel world) {
+ try {
+ world.saveLevelData();
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save level data for " + world.getWorld().getName(), thr);
+ }
+ }
+
+ private void finishTeleportations(final ThreadedRegionizer.ThreadedRegion region,
+ final ServerLevel world) {
+ try {
+ this.shuttingDown = region;
+ final List pendingTeleports = world.removeAllRegionTeleports();
+ if (pendingTeleports.isEmpty()) {
+ return;
+ }
+ final ChunkPos center = region.getCenterChunk();
+ LOGGER.info("Completing " + pendingTeleports.size() + " pending teleports in region around chunk " + center + " in world '" + region.regioniser.world.getWorld().getName() + "'");
+ for (final ServerLevel.PendingTeleport pendingTeleport : pendingTeleports) {
+ LOGGER.info("Completing teleportation to target position " + pendingTeleport.to());
+
+ // first, add entities to entity chunk so that they will be saved
+ for (final Entity.EntityTreeNode node : pendingTeleport.rootVehicle().getFullTree()) {
+ // assume that world and position are set to destination here
+ node.root.setLevel(world); // in case the pending teleport is from a portal before it finds the exact destination
+ world.getEntityLookup().addEntityForShutdownTeleportComplete(node.root);
+ }
+
+ // then, rebuild the passenger tree so that when saving only the root vehicle will be written - and if
+ // there are any player passengers, that the later player saving will save the tree
+ pendingTeleport.rootVehicle().restore();
+
+ // now we are finished
+ LOGGER.info("Completed teleportation to target position " + pendingTeleport.to());
+ }
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to complete pending teleports", thr);
+ } finally {
+ this.shuttingDown = null;
+ }
+ }
+
+ private void saveRegionChunks(final ThreadedRegionizer.ThreadedRegion region,
+ final boolean last) {
+ ChunkPos center = null;
+ try {
+ this.shuttingDown = region;
+ center = region.getCenterChunk();
+ LOGGER.info("Saving chunks around region around chunk " + center + " in world '" + region.regioniser.world.getWorld().getName() + "'");
+ region.regioniser.world.chunkTaskScheduler.chunkHolderManager.close(true, true, false, last, false);
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to save chunks for region around chunk " + center + " in world '" + region.regioniser.world.getWorld().getName() + "'", thr);
+ } finally {
+ this.shuttingDown = null;
+ }
+ }
+
+ private void haltChunkSystem(final ServerLevel world) {
+ try {
+ world.chunkTaskScheduler.chunkHolderManager.close(false, true, true, false, false);
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to halt chunk system for world '" + world.getWorld().getName() + "'", thr);
+ }
+ }
+
+ private void haltWorldNoRegions(final ServerLevel world) {
+ try {
+ world.chunkTaskScheduler.chunkHolderManager.close(true, true, true, true, false);
+ } catch (final Throwable thr) {
+ LOGGER.error("Failed to close world '" + world.getWorld().getName() + "' with no regions", thr);
+ }
+ }
+
+ @Override
+ public final void run() {
+ // await scheduler termination
+ LOGGER.info("Awaiting scheduler termination for 60s");
+ if (TickRegions.getScheduler().halt(true, TimeUnit.SECONDS.toNanos(60L))) {
+ LOGGER.info("Scheduler halted");
+ } else {
+ LOGGER.warn("Scheduler did not terminate within 60s, proceeding with shutdown anyways");
+ TickRegions.getScheduler().dumpAliveThreadTraces("Did not shut down in time");
+ }
+
+ MinecraftServer.getServer().stopServer(); // stop part 1: most logic, kicking players, plugins, etc
+ // halt all chunk systems first so that any in-progress chunk generation stops
+ LOGGER.info("Halting chunk systems");
+ for (final ServerLevel world : MinecraftServer.getServer().getAllLevels()) {
+ try {
+ world.chunkTaskScheduler.halt(false, 0L);
+ } catch (final Throwable throwable) {
+ LOGGER.error("Failed to soft halt chunk system for world '" + world.getWorld().getName() + "'", throwable);
+ }
+ }
+ for (final ServerLevel world : MinecraftServer.getServer().getAllLevels()) {
+ this.haltChunkSystem(world);
+ }
+ LOGGER.info("Halted chunk systems");
+ for (final ServerLevel world : MinecraftServer.getServer().getAllLevels()) {
+ final List>
+ regions = new ArrayList<>();
+ world.regioniser.computeForAllRegionsUnsynchronised(regions::add);
+
+ for (int i = 0, len = regions.size(); i < len; ++i) {
+ final ThreadedRegionizer.ThreadedRegion region = regions.get(i);
+ this.finishTeleportations(region, world);
+ }
+
+ for (int i = 0, len = regions.size(); i < len; ++i) {
+ final ThreadedRegionizer.ThreadedRegion region = regions.get(i);
+ this.saveRegionChunks(region, (i + 1) == len);
+ }
+
+ this.saveLevelData(world);
+ }
+ // moved from stop part 1
+ // we need this to be after saving level data, as that will complete any teleportations the player is in
+ LOGGER.info("Saving players");
+ MinecraftServer.getServer().getPlayerList().saveAll();
+
+ MinecraftServer.getServer().stopPart2(); // stop part 2: close other resources (io thread, etc)
+ // done, part 2 should call exit()
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionizedData.java b/src/main/java/io/papermc/paper/threadedregions/RegionizedData.java
new file mode 100644
index 0000000000000000000000000000000000000000..1f48ada99d6d24880f9bda1cd05d41a4562e42f5
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionizedData.java
@@ -0,0 +1,235 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.util.Validate;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
+import net.minecraft.server.level.ServerLevel;
+import javax.annotation.Nullable;
+import java.util.function.Supplier;
+
+/**
+ * Use to manage data that needs to be regionised.
+ *
+ * Note: that unlike {@link ThreadLocal}, regionised data is not deleted once the {@code RegionizedData} object is GC'd.
+ * The data is held in reference to the world it resides in.
+ *
+ *
+ * Note: Keep in mind that when regionised ticking is disabled, the entire server is considered a single region.
+ * That is, the data may or may not cross worlds. As such, the {@code RegionizedData} object must be instanced
+ * per world when appropriate, as it is no longer guaranteed that separate worlds contain separate regions.
+ * See below for more details on instancing per world.
+ *
+ *
+ * Regionised data may be world-checked. That is, {@link #get()} may throw an exception if the current
+ * region's world does not match the {@code RegionizedData}'s world. Consider the usages of {@code RegionizedData} below
+ * see why the behavior may or may not be desirable:
+ *
+ * {@code
+ * public class EntityTickList {
+ * private final List entities = new ArrayList<>();
+ *
+ * public void addEntity(Entity e) {
+ * this.entities.add(e);
+ * }
+ *
+ * public void removeEntity(Entity e) {
+ * this.entities.remove(e);
+ * }
+ * }
+ *
+ * public class World {
+ *
+ * // callback is left out of this example
+ * // note: world != null here
+ * public final RegionizedData entityTickLists =
+ * new RegionizedData<>(this, () -> new EntityTickList(), ...);
+ *
+ * public void addTickingEntity(Entity e) {
+ * // What we expect here is that this world is the
+ * // current ticking region's world.
+ * // If that is true, then calling this.entityTickLists.get()
+ * // will retrieve the current region's EntityTickList
+ * // for this world, which is fine since the current
+ * // region is contained within this world.
+ *
+ * // But if the current region's world is not this world,
+ * // and if the world check is disabled, then we will actually
+ * // retrieve _this_ world's EntityTickList for the region,
+ * // and NOT the EntityTickList for the region's world.
+ * // This is because the RegionizedData object is instantiated
+ * // per world.
+ * this.entityTickLists.get().addEntity(e);
+ * }
+ * }
+ *
+ * public class TickTimes {
+ *
+ * private final List tickTimesNS = new ArrayList<>();
+ *
+ * public void completeTick(long timeNS) {
+ * this.tickTimesNS.add(timeNS);
+ * }
+ *
+ * public double getAverageTickLengthMS() {
+ * double sum = 0.0;
+ * for (long time : tickTimesNS) {
+ * sum += (double)time;
+ * }
+ * return (sum / this.tickTimesNS.size()) / 1.0E6; // 1ms = 1 million ns
+ * }
+ * }
+ *
+ * public class Server {
+ * public final List worlds = ...;
+ *
+ * // callback is left out of this example
+ * // note: world == null here, because this RegionizedData object
+ * // is not instantiated per world, but rather globally.
+ * public final RegionizedData tickTimes =
+ * new RegionizedData<>(null, () -> new TickTimes(), ...);
+ * }
+ * }
+ *
+ * In general, it is advised that if a RegionizedData object is instantiated per world, that world checking
+ * is enabled for it by passing the world to the constructor.
+ *
+ */
+public final class RegionizedData {
+
+ private final ServerLevel world;
+ private final Supplier initialValueSupplier;
+ private final RegioniserCallback callback;
+
+ /**
+ * Creates a regionised data holder. The provided initial value supplier may not be null, and it must
+ * never produce {@code null} values.
+ *
+ * Note that the supplier or regioniser callback may be used while the region lock is held, so any blocking
+ * operations may deadlock the entire server and as such the function should be completely non-blocking
+ * and must complete in a timely manner.
+ *
+ *
+ * If the provided world is {@code null}, then the world checks are disabled. The world should only ever
+ * be {@code null} if the data is specifically not specific to worlds. For example, using {@code null}
+ * for an entity tick list is invalid since the entities are tied to a world and region,
+ * however using {@code null} for tasks to run at the end of a tick is valid since the tasks are tied to
+ * region only.
+ *
+ * @param world The world in which the region data resides.
+ * @param supplier Initial value supplier used to lazy initialise region data.
+ * @param callback Region callback to manage this regionised data.
+ */
+ public RegionizedData(final ServerLevel world, final Supplier supplier, final RegioniserCallback callback) {
+ this.world = world;
+ this.initialValueSupplier = Validate.notNull(supplier, "Supplier may not be null.");
+ this.callback = Validate.notNull(callback, "Regioniser callback may not be null.");
+ }
+
+ T createNewValue() {
+ return Validate.notNull(this.initialValueSupplier.get(), "Initial value supplier may not return null");
+ }
+
+ RegioniserCallback getCallback() {
+ return this.callback;
+ }
+
+ /**
+ * Returns the current data type for the current ticking region. If there is no region, returns {@code null}.
+ * @return the current data type for the current ticking region. If there is no region, returns {@code null}.
+ * @throws IllegalStateException If the following are true: The server is in region ticking mode,
+ * this {@code RegionizedData}'s world is not {@code null},
+ * and the current ticking region's world does not match this {@code RegionizedData}'s world.
+ */
+ public @Nullable T get() {
+ final ThreadedRegionizer.ThreadedRegion region =
+ TickRegionScheduler.getCurrentRegion();
+
+ if (region == null) {
+ return null;
+ }
+
+ if (this.world != null && this.world != region.getData().world) {
+ throw new IllegalStateException("World check failed: expected world: " + this.world.getWorld().getKey() + ", region world: " + region.getData().world.getWorld().getKey());
+ }
+
+ return region.getData().getOrCreateRegionizedData(this);
+ }
+
+ /**
+ * Class responsible for handling merge / split requests from the regioniser.
+ *
+ * It is critical to note that each function is called while holding the region lock.
+ *
+ */
+ public static interface RegioniserCallback {
+
+ /**
+ * Completely merges the data in {@code from} to {@code into}.
+ *
+ * Calculating Tick Offsets:
+ * Sometimes data stores absolute tick deadlines, and since regions tick independently, absolute deadlines
+ * are not comparable across regions. Consider absolute deadlines {@code deadlineFrom, deadlineTo} in
+ * regions {@code from} and {@code into} respectively. We can calculate the relative deadline for the from
+ * region with {@code relFrom = deadlineFrom - currentTickFrom}. Then, we can use the same equation for
+ * computing the absolute deadline in region {@code into} that has the same relative deadline as {@code from}
+ * as {@code deadlineTo = relFrom + currentTickTo}. By substituting {@code relFrom} as {@code deadlineFrom - currentTickFrom},
+ * we finally have that {@code deadlineTo = deadlineFrom + (currentTickTo - currentTickFrom)} and
+ * that we can use an offset {@code fromTickOffset = currentTickTo - currentTickFrom} to calculate
+ * {@code deadlineTo} as {@code deadlineTo = deadlineFrom + fromTickOffset}.
+ *
+ *
+ * Critical Notes:
+ *
+ *
+ * This function is called while the region lock is held, so any blocking operations may
+ * deadlock the entire server and as such the function should be completely non-blocking and must complete
+ * in a timely manner.
+ *
+ *
+ * This function may not throw any exceptions, or the server will be left in an unrecoverable state.
+ *
+ *
+ *
+ *
+ * @param from The data to merge from.
+ * @param into The data to merge into.
+ * @param fromTickOffset The addend to absolute tick deadlines stored in the {@code from} region to adjust to the into region.
+ */
+ public void merge(final T from, final T into, final long fromTickOffset);
+
+ /**
+ * Splits the data in {@code from} into {@code dataSet}.
+ *
+ * The chunk coordinate to region section coordinate bit shift amount is provided in {@code chunkToRegionShift}.
+ * To convert from chunk coordinates to region coordinates and keys, see the code below:
+ *
+ * {@code
+ * int chunkX = ...;
+ * int chunkZ = ...;
+ *
+ * int regionSectionX = chunkX >> chunkToRegionShift;
+ * int regionSectionZ = chunkZ >> chunkToRegionShift;
+ * long regionSectionKey = io.papermc.paper.util.CoordinateUtils.getChunkKey(regionSectionX, regionSectionZ);
+ * }
+ *
+ *
+ *
+ * The {@code regionToData} hashtable provides a lookup from {@code regionSectionKey} (see above) to the
+ * data that is owned by the region which occupies the region section.
+ *
+ *
+ * Unlike {@link #merge(Object, Object, long)}, there is no absolute tick offset provided. This is because
+ * the new regions formed from the split will start at the same tick number, and so no adjustment is required.
+ *
+ *
+ * @param from The data to split from.
+ * @param chunkToRegionShift The signed right-shift value used to convert chunk coordinates into region section coordinates.
+ * @param regionToData Lookup hash table from region section key to .
+ * @param dataSet The data set to split into.
+ */
+ public void split(
+ final T from, final int chunkToRegionShift,
+ final Long2ReferenceOpenHashMap regionToData, final ReferenceOpenHashSet dataSet
+ );
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionizedServer.java b/src/main/java/io/papermc/paper/threadedregions/RegionizedServer.java
new file mode 100644
index 0000000000000000000000000000000000000000..00d79c8095ec689b4a30648665c8fc0843783fd9
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionizedServer.java
@@ -0,0 +1,450 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
+import ca.spottedleaf.concurrentutil.scheduler.SchedulerThreadPool;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.threadedregions.scheduler.FoliaGlobalRegionScheduler;
+import io.papermc.paper.util.TickThread;
+import net.minecraft.CrashReport;
+import net.minecraft.ReportedException;
+import net.minecraft.network.Connection;
+import net.minecraft.network.PacketListener;
+import net.minecraft.network.PacketSendListener;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MutableComponent;
+import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.dedicated.DedicatedServer;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import net.minecraft.server.network.ServerLoginPacketListenerImpl;
+import net.minecraft.world.level.GameRules;
+import org.bukkit.Bukkit;
+import org.slf4j.Logger;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.BooleanSupplier;
+
+public final class RegionizedServer {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+ private static final RegionizedServer INSTANCE = new RegionizedServer();
+
+ public final RegionizedTaskQueue taskQueue = new RegionizedTaskQueue();
+
+ private final CopyOnWriteArrayList worlds = new CopyOnWriteArrayList<>();
+ private final CopyOnWriteArrayList connections = new CopyOnWriteArrayList<>();
+
+ private final MultiThreadedQueue globalTickQueue = new MultiThreadedQueue<>();
+
+ private final GlobalTickTickHandle tickHandle = new GlobalTickTickHandle(this);
+
+ public static RegionizedServer getInstance() {
+ return INSTANCE;
+ }
+
+ public void addConnection(final Connection conn) {
+ this.connections.add(conn);
+ }
+
+ private boolean removeConnection(final Connection conn) {
+ return this.connections.remove(conn);
+ }
+
+ public void addWorld(final ServerLevel world) {
+ this.worlds.add(world);
+ }
+
+ public void init() {
+ // call init event _before_ scheduling anything
+ new RegionizedServerInitEvent().callEvent();
+
+ // now we can schedule
+ this.tickHandle.setInitialStart(System.nanoTime() + TickRegionScheduler.TIME_BETWEEN_TICKS);
+ TickRegions.getScheduler().scheduleRegion(this.tickHandle);
+ TickRegions.getScheduler().init();
+ }
+
+ public void invalidateStatus() {
+ this.lastServerStatus = 0L;
+ }
+
+ public void addTaskWithoutNotify(final Runnable run) {
+ this.globalTickQueue.add(run);
+ }
+
+ public void addTask(final Runnable run) {
+ this.addTaskWithoutNotify(run);
+ TickRegions.getScheduler().setHasTasks(this.tickHandle);
+ }
+
+ /**
+ * Returns the current tick of the region ticking.
+ * @throws IllegalStateException If there is no current region.
+ */
+ public static long getCurrentTick() throws IllegalStateException {
+ final ThreadedRegionizer.ThreadedRegion region =
+ TickRegionScheduler.getCurrentRegion();
+ if (region == null) {
+ if (TickThread.isShutdownThread()) {
+ return 0L;
+ }
+ throw new IllegalStateException("No currently ticking region");
+ }
+ return region.getData().getCurrentTick();
+ }
+
+ public static boolean isGlobalTickThread() {
+ return INSTANCE.tickHandle == TickRegionScheduler.getCurrentTickingTask();
+ }
+
+ public static void ensureGlobalTickThread(final String reason) {
+ if (!isGlobalTickThread()) {
+ throw new IllegalStateException(reason);
+ }
+ }
+
+ public static TickRegionScheduler.RegionScheduleHandle getGlobalTickData() {
+ return INSTANCE.tickHandle;
+ }
+
+ private static final class GlobalTickTickHandle extends TickRegionScheduler.RegionScheduleHandle {
+
+ private final RegionizedServer server;
+
+ private final AtomicBoolean scheduled = new AtomicBoolean();
+ private final AtomicBoolean ticking = new AtomicBoolean();
+
+ public GlobalTickTickHandle(final RegionizedServer server) {
+ super(null, SchedulerThreadPool.DEADLINE_NOT_SET);
+ this.server = server;
+ }
+
+ /**
+ * Only valid to call BEFORE scheduled!!!!
+ */
+ final void setInitialStart(final long start) {
+ if (this.scheduled.getAndSet(true)) {
+ throw new IllegalStateException("Double scheduling global tick");
+ }
+ this.updateScheduledStart(start);
+ }
+
+ @Override
+ protected boolean tryMarkTicking() {
+ return !this.ticking.getAndSet(true);
+ }
+
+ @Override
+ protected boolean markNotTicking() {
+ return this.ticking.getAndSet(false);
+ }
+
+ @Override
+ protected void tickRegion(final int tickCount, final long startTime, final long scheduledEnd) {
+ this.drainTasks();
+ this.server.globalTick(tickCount);
+ }
+
+ private void drainTasks() {
+ while (this.runOneTask());
+ }
+
+ private boolean runOneTask() {
+ final Runnable run = this.server.globalTickQueue.poll();
+ if (run == null) {
+ return false;
+ }
+
+ // TODO try catch?
+ run.run();
+
+ return true;
+ }
+
+ @Override
+ protected boolean runRegionTasks(final BooleanSupplier canContinue) {
+ do {
+ if (!this.runOneTask()) {
+ return false;
+ }
+ } while (canContinue.getAsBoolean());
+
+ return true;
+ }
+
+ @Override
+ protected boolean hasIntermediateTasks() {
+ return !this.server.globalTickQueue.isEmpty();
+ }
+ }
+
+ private long lastServerStatus;
+ private long tickCount;
+
+ /*
+ private final java.util.Random random = new java.util.Random(4L);
+ private final List> walkers =
+ new java.util.ArrayList<>();
+ static final int PLAYERS = 500;
+ static final int RAD_BLOCKS = 1000;
+ static final int RAD = RAD_BLOCKS >> 4;
+ static final int RAD_BIG_BLOCKS = 100_000;
+ static final int RAD_BIG = RAD_BIG_BLOCKS >> 4;
+ static final int VD = 4 + 12;
+ static final int BIG_PLAYERS = 250;
+ static final double WALK_CHANCE = 0.3;
+ static final double TP_CHANCE = 0.2;
+ static final double TASK_CHANCE = 0.2;
+
+ private ServerLevel getWorld() {
+ return this.worlds.get(0);
+ }
+
+ private void init2() {
+ for (int i = 0; i < PLAYERS; ++i) {
+ int rad = i < BIG_PLAYERS ? RAD_BIG : RAD;
+ int posX = this.random.nextInt(-rad, rad + 1);
+ int posZ = this.random.nextInt(-rad, rad + 1);
+
+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap<>(null) {
+ @Override
+ protected void addCallback(Void parameter, int chunkX, int chunkZ) {
+ ServerLevel world = RegionizedServer.this.getWorld();
+ if (RegionizedServer.this.random.nextDouble() <= TASK_CHANCE) {
+ RegionizedServer.this.taskQueue.queueChunkTask(world, chunkX, chunkZ, () -> {
+ RegionizedServer.this.taskQueue.queueChunkTask(world, chunkX, chunkZ, () -> {});
+ });
+ }
+ world.chunkTaskScheduler.chunkHolderManager.addTicketAtLevel(
+ net.minecraft.server.level.TicketType.PLAYER, chunkX, chunkZ, io.papermc.paper.chunk.system.scheduling.ChunkHolderManager.MAX_TICKET_LEVEL, new net.minecraft.world.level.ChunkPos(posX, posZ)
+ );
+ }
+
+ @Override
+ protected void removeCallback(Void parameter, int chunkX, int chunkZ) {
+ ServerLevel world = RegionizedServer.this.getWorld();
+ if (RegionizedServer.this.random.nextDouble() <= TASK_CHANCE) {
+ RegionizedServer.this.taskQueue.queueChunkTask(world, chunkX, chunkZ, () -> {
+ RegionizedServer.this.taskQueue.queueChunkTask(world, chunkX, chunkZ, () -> {});
+ });
+ }
+ world.chunkTaskScheduler.chunkHolderManager.removeTicketAtLevel(
+ net.minecraft.server.level.TicketType.PLAYER, chunkX, chunkZ, io.papermc.paper.chunk.system.scheduling.ChunkHolderManager.MAX_TICKET_LEVEL, new net.minecraft.world.level.ChunkPos(posX, posZ)
+ );
+ }
+ };
+
+ map.add(posX, posZ, VD);
+
+ walkers.add(map);
+ }
+ }
+
+ private void randomWalk() {
+ if (this.walkers.isEmpty()) {
+ this.init2();
+ return;
+ }
+
+ for (int i = 0; i < PLAYERS; ++i) {
+ if (this.random.nextDouble() > WALK_CHANCE) {
+ continue;
+ }
+
+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = this.walkers.get(i);
+
+ int updateX = this.random.nextInt(-1, 2);
+ int updateZ = this.random.nextInt(-1, 2);
+
+ map.update(map.lastChunkX + updateX, map.lastChunkZ + updateZ, VD);
+ }
+
+ for (int i = 0; i < PLAYERS; ++i) {
+ if (random.nextDouble() >= TP_CHANCE) {
+ continue;
+ }
+
+ int rad = i < BIG_PLAYERS ? RAD_BIG : RAD;
+ int posX = random.nextInt(-rad, rad + 1);
+ int posZ = random.nextInt(-rad, rad + 1);
+
+ io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = walkers.get(i);
+
+ map.update(posX, posZ, VD);
+ }
+ }
+ */
+
+ private void globalTick(final int tickCount) {
+ /*
+ if (false) {
+ io.papermc.paper.threadedregions.ThreadedTicketLevelPropagator.main(null);
+ }
+ this.randomWalk();
+ */
+ ++this.tickCount;
+ // expire invalid click command callbacks
+ io.papermc.paper.adventure.providers.ClickCallbackProviderImpl.CALLBACK_MANAGER.handleQueue((int)this.tickCount);
+
+ // scheduler
+ ((FoliaGlobalRegionScheduler)Bukkit.getGlobalRegionScheduler()).tick();
+
+ // commands
+ ((DedicatedServer)MinecraftServer.getServer()).handleConsoleInputs();
+
+ // needs
+ // player ping sample
+ // world global tick
+ // connection tick
+
+ // tick player ping sample
+ this.tickPlayerSample();
+
+ // tick worlds
+ for (final ServerLevel world : this.worlds) {
+ this.globalTick(world, tickCount);
+ }
+
+ // tick connections
+ this.tickConnections();
+
+ // player list
+ MinecraftServer.getServer().getPlayerList().tick();
+ }
+
+ private void tickPlayerSample() {
+ final MinecraftServer mcServer = MinecraftServer.getServer();
+
+ final long currtime = System.nanoTime();
+
+ // player ping sample
+ // copied from MinecraftServer#tickServer
+ // note: we need to reorder setPlayers to be the last operation it does, rather than the first to avoid publishing
+ // an uncomplete status
+ if (currtime - this.lastServerStatus >= 5000000000L) {
+ this.lastServerStatus = currtime;
+ mcServer.rebuildServerStatus();
+ }
+ }
+
+ private boolean hasConnectionMovedToMain(final Connection conn) {
+ final PacketListener packetListener = conn.getPacketListener();
+
+ return (packetListener instanceof ServerGamePacketListenerImpl) ||
+ (packetListener instanceof ServerLoginPacketListenerImpl loginListener && loginListener.state.ordinal() >= ServerLoginPacketListenerImpl.State.HANDING_OFF.ordinal());
+ }
+
+ private void tickConnections() {
+ final List connections = new ArrayList<>(this.connections);
+ Collections.shuffle(connections); // shuffle to prevent people from "gaming" the server by re-logging
+ for (final Connection conn : connections) {
+ if (!conn.becomeActive()) {
+ continue;
+ }
+
+ if (this.hasConnectionMovedToMain(conn)) {
+ if (!conn.isConnected()) {
+ this.removeConnection(conn);
+ }
+ continue;
+ }
+
+ if (!conn.isConnected()) {
+ this.removeConnection(conn);
+ conn.handleDisconnection();
+ continue;
+ }
+
+ try {
+ conn.tick();
+ } catch (final Exception exception) {
+ if (conn.isMemoryConnection()) {
+ throw new ReportedException(CrashReport.forThrowable(exception, "Ticking memory connection"));
+ }
+
+ LOGGER.warn("Failed to handle packet for {}", io.papermc.paper.configuration.GlobalConfiguration.get().logging.logPlayerIpAddresses ? String.valueOf(conn.getRemoteAddress()) : "", exception); // Paper
+ MutableComponent ichatmutablecomponent = Component.literal("Internal server error");
+
+ conn.send(new ClientboundDisconnectPacket(ichatmutablecomponent), PacketSendListener.thenRun(() -> {
+ conn.disconnect(ichatmutablecomponent);
+ }));
+ conn.setReadOnly();
+ continue;
+ }
+ }
+ }
+
+ // A global tick only updates things like weather / worldborder, basically anything in the world that is
+ // NOT tied to a specific region, but rather shared amongst all of them.
+ private void globalTick(final ServerLevel world, final int tickCount) {
+ // needs
+ // worldborder tick
+ // advancing the weather cycle
+ // sleep status thing
+ // updating sky brightness
+ // time ticking (game time + daylight), plus PrimayLevelDat#getScheduledEvents ticking
+
+ // Typically, we expect there to be a running region to drain a world's global chunk tasks. However,
+ // this may not be the case - and thus, only the global tick thread can do anything.
+ world.taskQueueRegionData.drainGlobalChunkTasks();
+
+ // worldborder tick
+ this.tickWorldBorder(world);
+
+ // weather cycle
+ this.advanceWeatherCycle(world);
+
+ // sleep status
+ this.checkNightSkip(world);
+
+ // update raids
+ this.updateRaids(world);
+
+ // sky brightness
+ this.updateSkyBrightness(world);
+
+ // time ticking (TODO API synchronisation?)
+ this.tickTime(world, tickCount);
+
+ world.updateTickData();
+
+ world.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); // Folia - use area based lock to reduce contention - required now to eventually process ticket updates
+ }
+
+ private void updateRaids(final ServerLevel world) {
+ world.getRaids().globalTick();
+ }
+
+ private void checkNightSkip(final ServerLevel world) {
+ world.tickSleep();
+ }
+
+ private void advanceWeatherCycle(final ServerLevel world) {
+ world.advanceWeatherCycle();
+ }
+
+ private void updateSkyBrightness(final ServerLevel world) {
+ world.updateSkyBrightness();
+ }
+
+ private void tickWorldBorder(final ServerLevel world) {
+ world.getWorldBorder().tick();
+ }
+
+ private void tickTime(final ServerLevel world, final int tickCount) {
+ if (world.tickTime) {
+ if (world.levelData.getGameRules().getBoolean(GameRules.RULE_DAYLIGHT)) {
+ world.setDayTime(world.levelData.getDayTime() + (long)tickCount);
+ }
+ world.serverLevelData.setGameTime(world.serverLevelData.getGameTime() + (long)tickCount);
+ }
+ }
+
+ public static final record WorldLevelData(ServerLevel world, long nonRedstoneGameTime, long dayTime) {
+
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionizedTaskQueue.java b/src/main/java/io/papermc/paper/threadedregions/RegionizedTaskQueue.java
new file mode 100644
index 0000000000000000000000000000000000000000..98ddb674b63a4777a98152ea960debf48aa2bc35
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionizedTaskQueue.java
@@ -0,0 +1,768 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue;
+import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor;
+import ca.spottedleaf.concurrentutil.map.SWMRLong2ObjectHashTable;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import io.papermc.paper.chunk.system.scheduling.ChunkHolderManager;
+import io.papermc.paper.util.CoordinateUtils;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Reference2ReferenceMap;
+import it.unimi.dsi.fastutil.objects.Reference2ReferenceOpenHashMap;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.util.Unit;
+import java.lang.invoke.VarHandle;
+import java.util.ArrayDeque;
+import java.util.Iterator;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.locks.ReentrantLock;
+
+public final class RegionizedTaskQueue {
+
+ private static final TicketType TASK_QUEUE_TICKET = TicketType.create("task_queue_ticket", (a, b) -> 0);
+
+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run) {
+ return new PrioritisedQueue.ChunkBasedPriorityTask(world.taskQueueRegionData, chunkX, chunkZ, true, run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask createChunkTask(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return new PrioritisedQueue.ChunkBasedPriorityTask(world.taskQueueRegionData, chunkX, chunkZ, true, run, priority);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask createTickTaskQueue(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run) {
+ return new PrioritisedQueue.ChunkBasedPriorityTask(world.taskQueueRegionData, chunkX, chunkZ, false, run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask createTickTaskQueue(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run, final PrioritisedExecutor.Priority priority) {
+ return new PrioritisedQueue.ChunkBasedPriorityTask(world.taskQueueRegionData, chunkX, chunkZ, false, run, priority);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask queueChunkTask(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run) {
+ return this.queueChunkTask(world, chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask queueChunkTask(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run, final PrioritisedExecutor.Priority priority) {
+ final PrioritisedExecutor.PrioritisedTask ret = this.createChunkTask(world, chunkX, chunkZ, run, priority);
+ ret.queue();
+ return ret;
+ }
+
+ public PrioritisedExecutor.PrioritisedTask queueTickTaskQueue(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run) {
+ return this.queueTickTaskQueue(world, chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL);
+ }
+
+ public PrioritisedExecutor.PrioritisedTask queueTickTaskQueue(final ServerLevel world, final int chunkX, final int chunkZ,
+ final Runnable run, final PrioritisedExecutor.Priority priority) {
+ final PrioritisedExecutor.PrioritisedTask ret = this.createTickTaskQueue(world, chunkX, chunkZ, run, priority);
+ ret.queue();
+ return ret;
+ }
+
+ public static final class WorldRegionTaskData {
+ private final ServerLevel world;
+ private final MultiThreadedQueue globalChunkTask = new MultiThreadedQueue<>();
+ private final java.util.concurrent.ConcurrentHashMap referenceCounters = new java.util.concurrent.ConcurrentHashMap<>(); // Folia - use area based lock to reduce contention
+
+ public WorldRegionTaskData(final ServerLevel world) {
+ this.world = world;
+ }
+
+ private boolean executeGlobalChunkTask() {
+ final Runnable run = this.globalChunkTask.poll();
+ if (run != null) {
+ run.run();
+ return true;
+ }
+ return false;
+ }
+
+ public void drainGlobalChunkTasks() {
+ while (this.executeGlobalChunkTask());
+ }
+
+ public void pushGlobalChunkTask(final Runnable run) {
+ this.globalChunkTask.add(run);
+ }
+
+ private PrioritisedQueue getQueue(final boolean synchronise, final int chunkX, final int chunkZ, final boolean isChunkTask) {
+ final ThreadedRegionizer regioniser = this.world.regioniser;
+ final ThreadedRegionizer.ThreadedRegion region
+ = synchronise ? regioniser.getRegionAtSynchronised(chunkX, chunkZ) : regioniser.getRegionAtUnsynchronised(chunkX, chunkZ);
+ if (region == null) {
+ return null;
+ }
+ final RegionTaskQueueData taskQueueData = region.getData().getTaskQueueData();
+ return (isChunkTask ? taskQueueData.chunkQueue : taskQueueData.tickTaskQueue);
+ }
+
+ private void removeTicket(final long coord) {
+ this.world.chunkTaskScheduler.chunkHolderManager.removeTicketAtLevel(
+ TASK_QUEUE_TICKET, coord, ChunkHolderManager.MAX_TICKET_LEVEL, Unit.INSTANCE
+ );
+ }
+
+ private void addTicket(final long coord) {
+ this.world.chunkTaskScheduler.chunkHolderManager.addTicketAtLevel(
+ TASK_QUEUE_TICKET, coord, ChunkHolderManager.MAX_TICKET_LEVEL, Unit.INSTANCE
+ );
+ }
+
+ // Folia start - use area based lock to reduce contention
+ private void processTicketUpdates(final long coord) {
+ this.world.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(CoordinateUtils.getChunkX(coord), CoordinateUtils.getChunkZ(coord));
+ }
+ // Folia end - use area based lock to reduce contention
+
+ private void decrementReference(final AtomicLong reference, final long coord) {
+ final long val = reference.decrementAndGet();
+ if (val == 0L) {
+ final int chunkX = CoordinateUtils.getChunkX(coord); // Folia - use area based lock to reduce contention
+ final int chunkZ = CoordinateUtils.getChunkZ(coord); // Folia - use area based lock to reduce contention
+ final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkCoordinate key = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkCoordinate(coord); // Folia - use area based lock to reduce contention
+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.world.chunkTaskScheduler.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention
+ try {
+ if (this.referenceCounters.remove(key, reference)) { // Folia - use area based lock to reduce contention
+ WorldRegionTaskData.this.removeTicket(coord);
+ } // else: race condition, something replaced our reference - not our issue anymore
+ } finally {
+ this.world.chunkTaskScheduler.chunkHolderManager.ticketLockArea.unlock(ticketLock); // Folia - use area based lock to reduce contention
+ }
+ } else if (val < 0L) {
+ throw new IllegalStateException("Reference count < 0: " + val);
+ }
+ }
+
+ private AtomicLong incrementReference(final long coord) {
+ final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkCoordinate key = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkCoordinate(coord); // Folia - use area based lock to reduce contention
+ final AtomicLong ret = this.referenceCounters.get(key); // Folia - use area based lock to reduce contention
+ if (ret != null) {
+ // try to fast acquire counter
+ int failures = 0;
+ for (long curr = ret.get();;) {
+ if (curr == 0L) {
+ // failed to fast acquire as reference expired
+ break;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr == (curr = ret.compareAndExchange(curr, curr + 1L))) {
+ return ret;
+ }
+
+ ++failures;
+ }
+ }
+
+ // slow acquire
+ final int chunkX = CoordinateUtils.getChunkX(coord); // Folia - use area based lock to reduce contention
+ final int chunkZ = CoordinateUtils.getChunkZ(coord); // Folia - use area based lock to reduce contention
+ final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.world.chunkTaskScheduler.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention
+ final AtomicLong ret2;
+ final boolean processTicketUpdates;
+ try {
+ final AtomicLong replace = new AtomicLong(1L);
+ final AtomicLong valueInMap = this.referenceCounters.putIfAbsent(key, replace); // Folia - use area based lock to reduce contention
+ if (valueInMap == null) {
+ // replaced, we should usually be here
+ this.addTicket(coord);
+ ret2 = replace;
+ processTicketUpdates = true;
+ } else {
+ processTicketUpdates = false;
+ int failures = 0;
+ for (long curr = valueInMap.get();;) {
+ if (curr == 0L) {
+ // don't need to add ticket here, since ticket is only removed during the lock
+ // we just need to replace the value in the map so that the thread removing fails and doesn't
+ // remove the ticket (see decrementReference)
+ this.referenceCounters.put(key, replace); // Folia - use area based lock to reduce contention
+ ret2 = replace;
+ break;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr == (curr = valueInMap.compareAndExchange(curr, curr + 1L))) {
+ // acquired
+ ret2 = valueInMap;
+ break;
+ }
+
+ ++failures;
+ }
+ }
+ } finally {
+ this.world.chunkTaskScheduler.chunkHolderManager.ticketLockArea.unlock(ticketLock); // Folia - use area based lock to reduce contention
+ }
+
+ if (processTicketUpdates) {
+ this.processTicketUpdates(coord);
+ }
+
+ return ret2;
+ }
+ }
+
+ public static final class RegionTaskQueueData {
+ private final PrioritisedQueue tickTaskQueue = new PrioritisedQueue();
+ private final PrioritisedQueue chunkQueue = new PrioritisedQueue();
+ private final WorldRegionTaskData worldRegionTaskData;
+
+ public RegionTaskQueueData(final WorldRegionTaskData worldRegionTaskData) {
+ this.worldRegionTaskData = worldRegionTaskData;
+ }
+
+ void mergeInto(final RegionTaskQueueData into) {
+ this.tickTaskQueue.mergeInto(into.tickTaskQueue);
+ this.chunkQueue.mergeInto(into.chunkQueue);
+ }
+
+ public boolean executeTickTask() {
+ return this.tickTaskQueue.executeTask();
+ }
+
+ public boolean executeChunkTask() {
+ return this.worldRegionTaskData.executeGlobalChunkTask() || this.chunkQueue.executeTask();
+ }
+
+ void split(final ThreadedRegionizer regioniser,
+ final Long2ReferenceOpenHashMap> into) {
+ this.tickTaskQueue.split(
+ false, regioniser, into
+ );
+ this.chunkQueue.split(
+ true, regioniser, into
+ );
+ }
+
+ public void drainTasks() {
+ final PrioritisedQueue tickTaskQueue = this.tickTaskQueue;
+ final PrioritisedQueue chunkTaskQueue = this.chunkQueue;
+
+ int allowedTickTasks = tickTaskQueue.getScheduledTasks();
+ int allowedChunkTasks = chunkTaskQueue.getScheduledTasks();
+
+ boolean executeTickTasks = allowedTickTasks > 0;
+ boolean executeChunkTasks = allowedChunkTasks > 0;
+ boolean executeGlobalTasks = true;
+
+ do {
+ executeTickTasks = executeTickTasks && allowedTickTasks-- > 0 && tickTaskQueue.executeTask();
+ executeChunkTasks = executeChunkTasks && allowedChunkTasks-- > 0 && chunkTaskQueue.executeTask();
+ executeGlobalTasks = executeGlobalTasks && this.worldRegionTaskData.executeGlobalChunkTask();
+ } while (executeTickTasks | executeChunkTasks | executeGlobalTasks);
+
+ if (allowedChunkTasks > 0) {
+ // if we executed chunk tasks, we should try to process ticket updates for full status changes
+ this.worldRegionTaskData.world.chunkTaskScheduler.chunkHolderManager.processTicketUpdates();
+ }
+ }
+
+ public boolean hasTasks() {
+ return !this.tickTaskQueue.isEmpty() || !this.chunkQueue.isEmpty();
+ }
+ }
+
+ static final class PrioritisedQueue {
+ private final ArrayDeque[] queues = new ArrayDeque[PrioritisedExecutor.Priority.TOTAL_SCHEDULABLE_PRIORITIES]; {
+ for (int i = 0; i < PrioritisedExecutor.Priority.TOTAL_SCHEDULABLE_PRIORITIES; ++i) {
+ this.queues[i] = new ArrayDeque<>();
+ }
+ }
+ private boolean isDestroyed;
+
+ public int getScheduledTasks() {
+ synchronized (this) {
+ int ret = 0;
+
+ for (final ArrayDeque queue : this.queues) {
+ ret += queue.size();
+ }
+
+ return ret;
+ }
+ }
+
+ public boolean isEmpty() {
+ final ArrayDeque[] queues = this.queues;
+ final int max = PrioritisedExecutor.Priority.IDLE.priority;
+ synchronized (this) {
+ for (int i = 0; i <= max; ++i) {
+ if (!queues[i].isEmpty()) {
+ return false;
+ }
+ }
+ return true;
+ }
+ }
+
+ public void mergeInto(final PrioritisedQueue target) {
+ synchronized (this) {
+ this.isDestroyed = true;
+ mergeInto(target, this.queues);
+ }
+ }
+
+ private static void mergeInto(final PrioritisedQueue target, final ArrayDeque[] thisQueues) {
+ synchronized (target) {
+ final ArrayDeque[] otherQueues = target.queues;
+ for (int i = 0; i < thisQueues.length; ++i) {
+ final ArrayDeque fromQ = thisQueues[i];
+ final ArrayDeque intoQ = otherQueues[i];
+
+ // it is possible for another thread to queue tasks into the target queue before we do
+ // since only the ticking region can poll, we don't have to worry about it when they are being queued -
+ // but when we are merging, we need to ensure order is maintained (notwithstanding priority changes)
+ // we can ensure order is maintained by adding all of the tasks from the fromQ into the intoQ at the
+ // front of the queue, but we need to use descending iterator to ensure we do not reverse
+ // the order of elements from fromQ
+ for (final Iterator iterator = fromQ.descendingIterator(); iterator.hasNext();) {
+ intoQ.addFirst(iterator.next());
+ }
+ }
+ }
+ }
+
+ // into is a map of section coordinate to region
+ public void split(final boolean isChunkData,
+ final ThreadedRegionizer regioniser,
+ final Long2ReferenceOpenHashMap> into) {
+ final Reference2ReferenceOpenHashMap, ArrayDeque[]>
+ split = new Reference2ReferenceOpenHashMap<>();
+ final int shift = regioniser.sectionChunkShift;
+ synchronized (this) {
+ this.isDestroyed = true;
+ // like mergeTarget, we need to be careful about insertion order so we can maintain order when splitting
+
+ // first, build the targets
+ final ArrayDeque[] thisQueues = this.queues;
+ for (int i = 0; i < thisQueues.length; ++i) {
+ final ArrayDeque fromQ = thisQueues[i];
+
+ for (final ChunkBasedPriorityTask task : fromQ) {
+ final int sectionX = task.chunkX >> shift;
+ final int sectionZ = task.chunkZ >> shift;
+ final long sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+ final ThreadedRegionizer.ThreadedRegion
+ region = into.get(sectionKey);
+ if (region == null) {
+ throw new IllegalStateException();
+ }
+
+ split.computeIfAbsent(region, (keyInMap) -> {
+ final ArrayDeque[] ret = new ArrayDeque[PrioritisedExecutor.Priority.TOTAL_SCHEDULABLE_PRIORITIES];
+
+ for (int k = 0; k < ret.length; ++k) {
+ ret[k] = new ArrayDeque<>();
+ }
+
+ return ret;
+ })[i].add(task);
+ }
+ }
+
+ // merge the targets into their queues
+ for (final Iterator, ArrayDeque[]>>
+ iterator = split.reference2ReferenceEntrySet().fastIterator();
+ iterator.hasNext();) {
+ final Reference2ReferenceMap.Entry, ArrayDeque[]>
+ entry = iterator.next();
+ final RegionTaskQueueData taskQueueData = entry.getKey().getData().getTaskQueueData();
+ mergeInto(isChunkData ? taskQueueData.chunkQueue : taskQueueData.tickTaskQueue, entry.getValue());
+ }
+ }
+ }
+
+ /**
+ * returns null if the task cannot be scheduled, returns false if this task queue is dead, and returns true
+ * if the task was added
+ */
+ private Boolean tryPush(final ChunkBasedPriorityTask task) {
+ final ArrayDeque[] queues = this.queues;
+ synchronized (this) {
+ final PrioritisedExecutor.Priority priority = task.getPriority();
+ if (priority == PrioritisedExecutor.Priority.COMPLETING) {
+ return null;
+ }
+ if (this.isDestroyed) {
+ return Boolean.FALSE;
+ }
+ queues[priority.priority].addLast(task);
+ return Boolean.TRUE;
+ }
+ }
+
+ private boolean executeTask() {
+ final ArrayDeque[] queues = this.queues;
+ final int max = PrioritisedExecutor.Priority.IDLE.priority;
+ ChunkBasedPriorityTask task = null;
+ AtomicLong referenceCounter = null;
+ synchronized (this) {
+ if (this.isDestroyed) {
+ throw new IllegalStateException("Attempting to poll from dead queue");
+ }
+
+ search_loop:
+ for (int i = 0; i <= max; ++i) {
+ final ArrayDeque queue = queues[i];
+ while ((task = queue.pollFirst()) != null) {
+ if ((referenceCounter = task.trySetCompleting(i)) != null) {
+ break search_loop;
+ }
+ }
+ }
+ }
+
+ if (task == null) {
+ return false;
+ }
+
+ try {
+ task.executeInternal();
+ } finally {
+ task.world.decrementReference(referenceCounter, task.sectionLowerLeftCoord);
+ }
+
+ return true;
+ }
+
+ private static final class ChunkBasedPriorityTask implements PrioritisedExecutor.PrioritisedTask {
+
+ private static final AtomicLong REFERENCE_COUNTER_NOT_SET = new AtomicLong(-1L);
+
+ private final WorldRegionTaskData world;
+ private final int chunkX;
+ private final int chunkZ;
+ private final long sectionLowerLeftCoord; // chunk coordinate
+ private final boolean isChunkTask;
+
+ private volatile AtomicLong referenceCounter;
+ private static final VarHandle REFERENCE_COUNTER_HANDLE = ConcurrentUtil.getVarHandle(ChunkBasedPriorityTask.class, "referenceCounter", AtomicLong.class);
+ private Runnable run;
+ private volatile PrioritisedExecutor.Priority priority;
+ private static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(ChunkBasedPriorityTask.class, "priority", PrioritisedExecutor.Priority.class);
+
+ ChunkBasedPriorityTask(final WorldRegionTaskData world, final int chunkX, final int chunkZ, final boolean isChunkTask,
+ final Runnable run, final PrioritisedExecutor.Priority priority) {
+ this.world = world;
+ this.chunkX = chunkX;
+ this.chunkZ = chunkZ;
+ this.isChunkTask = isChunkTask;
+ this.run = run;
+ this.setReferenceCounterPlain(REFERENCE_COUNTER_NOT_SET);
+ this.setPriorityPlain(priority);
+
+ final int regionShift = world.world.regioniser.sectionChunkShift;
+ final int regionMask = (1 << regionShift) - 1;
+
+ this.sectionLowerLeftCoord = CoordinateUtils.getChunkKey(chunkX & ~regionMask, chunkZ & ~regionMask);
+ }
+
+ private PrioritisedExecutor.Priority getPriorityVolatile() {
+ return (PrioritisedExecutor.Priority)PRIORITY_HANDLE.getVolatile(this);
+ }
+
+ private void setPriorityPlain(final PrioritisedExecutor.Priority priority) {
+ PRIORITY_HANDLE.set(this, priority);
+ }
+
+ private void setPriorityVolatile(final PrioritisedExecutor.Priority priority) {
+ PRIORITY_HANDLE.setVolatile(this, priority);
+ }
+
+ private PrioritisedExecutor.Priority compareAndExchangePriority(final PrioritisedExecutor.Priority expect, final PrioritisedExecutor.Priority update) {
+ return (PrioritisedExecutor.Priority)PRIORITY_HANDLE.compareAndExchange(this, expect, update);
+ }
+
+ private void setReferenceCounterPlain(final AtomicLong value) {
+ REFERENCE_COUNTER_HANDLE.set(this, value);
+ }
+
+ private AtomicLong getReferenceCounterVolatile() {
+ return (AtomicLong)REFERENCE_COUNTER_HANDLE.get(this);
+ }
+
+ private AtomicLong compareAndExchangeReferenceCounter(final AtomicLong expect, final AtomicLong update) {
+ return (AtomicLong)REFERENCE_COUNTER_HANDLE.compareAndExchange(this, expect, update);
+ }
+
+ private void executeInternal() {
+ try {
+ this.run.run();
+ } finally {
+ this.run = null;
+ }
+ }
+
+ private void cancelInternal() {
+ this.run = null;
+ }
+
+ private boolean tryComplete(final boolean cancel) {
+ int failures = 0;
+ for (AtomicLong curr = this.getReferenceCounterVolatile();;) {
+ if (curr == null) {
+ return false;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr != (curr = this.compareAndExchangeReferenceCounter(curr, null))) {
+ ++failures;
+ continue;
+ }
+
+ // we have the reference count, we win no matter what.
+ this.setPriorityVolatile(PrioritisedExecutor.Priority.COMPLETING);
+
+ try {
+ if (cancel) {
+ this.cancelInternal();
+ } else {
+ this.executeInternal();
+ }
+ } finally {
+ if (curr != REFERENCE_COUNTER_NOT_SET) {
+ this.world.decrementReference(curr, this.sectionLowerLeftCoord);
+ }
+ }
+
+ return true;
+ }
+ }
+
+ @Override
+ public boolean queue() {
+ if (this.getReferenceCounterVolatile() != REFERENCE_COUNTER_NOT_SET) {
+ return false;
+ }
+
+ final AtomicLong referenceCounter = this.world.incrementReference(this.sectionLowerLeftCoord);
+ if (this.compareAndExchangeReferenceCounter(REFERENCE_COUNTER_NOT_SET, referenceCounter) != REFERENCE_COUNTER_NOT_SET) {
+ // we don't expect race conditions here, so it is OK if we have to needlessly reference count
+ this.world.decrementReference(referenceCounter, this.sectionLowerLeftCoord);
+ return false;
+ }
+
+ boolean synchronise = false;
+ for (;;) {
+ // we need to synchronise for repeated operations so that we guarantee that we do not retrieve
+ // the same queue again, as the region lock will be given to us only when the merge/split operation
+ // is done
+ final PrioritisedQueue queue = this.world.getQueue(synchronise, this.chunkX, this.chunkZ, this.isChunkTask);
+
+ if (queue == null) {
+ if (!synchronise) {
+ // may be incorrectly null when unsynchronised
+ synchronise = true;
+ continue;
+ }
+ // may have been cancelled before we got to the queue
+ if (this.getReferenceCounterVolatile() != null) {
+ throw new IllegalStateException("Expected null ref count when queue does not exist");
+ }
+ // the task never could be polled from the queue, so we return false
+ // don't decrement reference count, as we were certainly cancelled by another thread, which
+ // will decrement the reference count
+ return false;
+ }
+
+ synchronise = true;
+
+ final Boolean res = queue.tryPush(this);
+ if (res == null) {
+ // we were cancelled
+ // don't decrement reference count, as we were certainly cancelled by another thread, which
+ // will decrement the reference count
+ return false;
+ }
+
+ if (!res.booleanValue()) {
+ // failed, try again
+ continue;
+ }
+
+ // successfully queued
+ return true;
+ }
+ }
+
+ private AtomicLong trySetCompleting(final int minPriority) {
+ // first, try to set priority to EXECUTING
+ for (PrioritisedExecutor.Priority curr = this.getPriorityVolatile();;) {
+ if (curr.isLowerPriority(minPriority)) {
+ return null;
+ }
+
+ if (curr == (curr = this.compareAndExchangePriority(curr, PrioritisedExecutor.Priority.COMPLETING))) {
+ break;
+ } // else: continue
+ }
+
+ for (AtomicLong curr = this.getReferenceCounterVolatile();;) {
+ if (curr == null) {
+ // something acquired before us
+ return null;
+ }
+
+ if (curr == REFERENCE_COUNTER_NOT_SET) {
+ throw new IllegalStateException();
+ }
+
+ if (curr != (curr = this.compareAndExchangeReferenceCounter(curr, null))) {
+ continue;
+ }
+ return curr;
+ }
+ }
+
+ private void updatePriorityInQueue() {
+ boolean synchronise = false;
+ for (;;) {
+ final AtomicLong referenceCount = this.getReferenceCounterVolatile();
+ if (referenceCount == REFERENCE_COUNTER_NOT_SET || referenceCount == null) {
+ // cancelled or not queued
+ return;
+ }
+
+ if (this.getPriorityVolatile() == PrioritisedExecutor.Priority.COMPLETING) {
+ // cancelled
+ return;
+ }
+
+ // we need to synchronise for repeated operations so that we guarantee that we do not retrieve
+ // the same queue again, as the region lock will be given to us only when the merge/split operation
+ // is done
+ final PrioritisedQueue queue = this.world.getQueue(synchronise, this.chunkX, this.chunkZ, this.isChunkTask);
+
+ if (queue == null) {
+ if (!synchronise) {
+ // may be incorrectly null when unsynchronised
+ continue;
+ }
+ // must have been removed
+ return;
+ }
+
+ synchronise = true;
+
+ final Boolean res = queue.tryPush(this);
+ if (res == null) {
+ // we were cancelled
+ return;
+ }
+
+ if (!res.booleanValue()) {
+ // failed, try again
+ continue;
+ }
+
+ // successfully queued
+ return;
+ }
+ }
+
+ @Override
+ public PrioritisedExecutor.Priority getPriority() {
+ return this.getPriorityVolatile();
+ }
+
+ @Override
+ public boolean lowerPriority(final PrioritisedExecutor.Priority priority) {
+ int failures = 0;
+ for (PrioritisedExecutor.Priority curr = this.getPriorityVolatile();;) {
+ if (curr == PrioritisedExecutor.Priority.COMPLETING) {
+ return false;
+ }
+
+ if (curr.isLowerOrEqualPriority(priority)) {
+ return false;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr == (curr = this.compareAndExchangePriority(curr, priority))) {
+ this.updatePriorityInQueue();
+ return true;
+ }
+ ++failures;
+ }
+ }
+
+ @Override
+ public boolean setPriority(final PrioritisedExecutor.Priority priority) {
+ int failures = 0;
+ for (PrioritisedExecutor.Priority curr = this.getPriorityVolatile();;) {
+ if (curr == PrioritisedExecutor.Priority.COMPLETING) {
+ return false;
+ }
+
+ if (curr == priority) {
+ return false;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr == (curr = this.compareAndExchangePriority(curr, priority))) {
+ this.updatePriorityInQueue();
+ return true;
+ }
+ ++failures;
+ }
+ }
+
+ @Override
+ public boolean raisePriority(final PrioritisedExecutor.Priority priority) {
+ int failures = 0;
+ for (PrioritisedExecutor.Priority curr = this.getPriorityVolatile();;) {
+ if (curr == PrioritisedExecutor.Priority.COMPLETING) {
+ return false;
+ }
+
+ if (curr.isHigherOrEqualPriority(priority)) {
+ return false;
+ }
+
+ for (int i = 0; i < failures; ++i) {
+ ConcurrentUtil.backoff();
+ }
+
+ if (curr == (curr = this.compareAndExchangePriority(curr, priority))) {
+ this.updatePriorityInQueue();
+ return true;
+ }
+ ++failures;
+ }
+ }
+
+ @Override
+ public boolean execute() {
+ return this.tryComplete(false);
+ }
+
+ @Override
+ public boolean cancel() {
+ return this.tryComplete(true);
+ }
+ }
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java b/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java
new file mode 100644
index 0000000000000000000000000000000000000000..41db6c61de36ebb1c214423dca0ba6a0c5a95cc1
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/RegionizedWorldData.java
@@ -0,0 +1,685 @@
+package io.papermc.paper.threadedregions;
+
+import com.destroystokyo.paper.util.maplist.ReferenceList;
+import com.destroystokyo.paper.util.misc.PlayerAreaMap;
+import com.destroystokyo.paper.util.misc.PooledLinkedHashSets;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.scheduling.ChunkHolderManager;
+import io.papermc.paper.util.CoordinateUtils;
+import io.papermc.paper.util.TickThread;
+import io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet;
+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceMap;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet;
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
+import net.minecraft.CrashReport;
+import net.minecraft.ReportedException;
+import net.minecraft.core.BlockPos;
+import net.minecraft.network.Connection;
+import net.minecraft.network.PacketSendListener;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.MutableComponent;
+import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import net.minecraft.util.VisibleForDebug;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.Mob;
+import net.minecraft.world.entity.ai.village.VillageSiege;
+import net.minecraft.world.entity.item.ItemEntity;
+import net.minecraft.world.level.BlockEventData;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.NaturalSpawner;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.TickingBlockEntity;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.material.Fluid;
+import net.minecraft.world.level.redstone.CollectingNeighborUpdater;
+import net.minecraft.world.level.redstone.NeighborUpdater;
+import net.minecraft.world.phys.AABB;
+import net.minecraft.world.ticks.LevelTicks;
+import org.bukkit.craftbukkit.block.CraftBlockState;
+import org.bukkit.craftbukkit.util.UnsafeList;
+import org.slf4j.Logger;
+import javax.annotation.Nullable;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+
+public final class RegionizedWorldData {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+
+ public static final RegionizedData.RegioniserCallback REGION_CALLBACK = new RegionizedData.RegioniserCallback<>() {
+ @Override
+ public void merge(final RegionizedWorldData from, final RegionizedWorldData into, final long fromTickOffset) {
+ // connections
+ for (final Connection conn : from.connections) {
+ into.connections.add(conn);
+ }
+ // time
+ final long fromRedstoneTimeOffset = into.redstoneTime - from.redstoneTime;
+ // entities
+ for (final ServerPlayer player : from.localPlayers) {
+ into.localPlayers.add(player);
+ }
+ for (final Entity entity : from.allEntities) {
+ into.allEntities.add(entity);
+ entity.updateTicks(fromTickOffset, fromRedstoneTimeOffset);
+ }
+ for (final Iterator iterator = from.entityTickList.unsafeIterator(); iterator.hasNext();) {
+ into.entityTickList.add(iterator.next());
+ }
+ for (final Iterator iterator = from.navigatingMobs.unsafeIterator(); iterator.hasNext();) {
+ into.navigatingMobs.add(iterator.next());
+ }
+ // block ticking
+ into.blockEvents.addAll(from.blockEvents);
+ // ticklists use game time
+ from.blockLevelTicks.merge(into.blockLevelTicks, fromRedstoneTimeOffset);
+ from.fluidLevelTicks.merge(into.fluidLevelTicks, fromRedstoneTimeOffset);
+
+ // tile entity ticking
+ for (final TickingBlockEntity tileEntityWrapped : from.pendingBlockEntityTickers) {
+ into.pendingBlockEntityTickers.add(tileEntityWrapped);
+ final BlockEntity tileEntity = tileEntityWrapped.getTileEntity();
+ if (tileEntity != null) {
+ tileEntity.updateTicks(fromTickOffset, fromRedstoneTimeOffset);
+ }
+ }
+ for (final TickingBlockEntity tileEntityWrapped : from.blockEntityTickers) {
+ into.blockEntityTickers.add(tileEntityWrapped);
+ final BlockEntity tileEntity = tileEntityWrapped.getTileEntity();
+ if (tileEntity != null) {
+ tileEntity.updateTicks(fromTickOffset, fromRedstoneTimeOffset);
+ }
+ }
+
+ // ticking chunks
+ for (final Iterator iterator = from.entityTickingChunks.unsafeIterator(); iterator.hasNext();) {
+ into.entityTickingChunks.add(iterator.next());
+ }
+ // redstone torches
+ if (from.redstoneUpdateInfos != null && !from.redstoneUpdateInfos.isEmpty()) {
+ if (into.redstoneUpdateInfos == null) {
+ into.redstoneUpdateInfos = new ArrayDeque<>();
+ }
+ for (final net.minecraft.world.level.block.RedstoneTorchBlock.Toggle info : from.redstoneUpdateInfos) {
+ info.offsetTime(fromRedstoneTimeOffset);
+ into.redstoneUpdateInfos.add(info);
+ }
+ }
+ // light chunks being worked on
+ into.chunksBeingWorkedOn.putAll(from.chunksBeingWorkedOn);
+ // mob spawning
+ into.catSpawnerNextTick = Math.max(from.catSpawnerNextTick, into.catSpawnerNextTick);
+ into.patrolSpawnerNextTick = Math.max(from.patrolSpawnerNextTick, into.patrolSpawnerNextTick);
+ into.phantomSpawnerNextTick = Math.max(from.phantomSpawnerNextTick, into.phantomSpawnerNextTick);
+ if (from.wanderingTraderTickDelay != Integer.MIN_VALUE && into.wanderingTraderTickDelay != Integer.MIN_VALUE) {
+ into.wanderingTraderTickDelay = Math.max(from.wanderingTraderTickDelay, into.wanderingTraderTickDelay);
+ into.wanderingTraderSpawnDelay = Math.max(from.wanderingTraderSpawnDelay, into.wanderingTraderSpawnDelay);
+ into.wanderingTraderSpawnChance = Math.max(from.wanderingTraderSpawnChance, into.wanderingTraderSpawnChance);
+ }
+ }
+
+ @Override
+ public void split(final RegionizedWorldData from, final int chunkToRegionShift,
+ final Long2ReferenceOpenHashMap regionToData,
+ final ReferenceOpenHashSet dataSet) {
+ // connections
+ for (final Connection conn : from.connections) {
+ final ServerPlayer player = conn.getPlayer();
+ final ChunkPos pos = player.chunkPosition();
+ // Note: It is impossible for an entity in the world to _not_ be in an entity chunk, which means
+ // the chunk holder must _exist_, and so the region section exists.
+ regionToData.get(CoordinateUtils.getChunkKey(pos.x >> chunkToRegionShift, pos.z >> chunkToRegionShift))
+ .connections.add(conn);
+ }
+ // entities
+ for (final ServerPlayer player : from.localPlayers) {
+ final ChunkPos pos = player.chunkPosition();
+ // Note: It is impossible for an entity in the world to _not_ be in an entity chunk, which means
+ // the chunk holder must _exist_, and so the region section exists.
+ regionToData.get(CoordinateUtils.getChunkKey(pos.x >> chunkToRegionShift, pos.z >> chunkToRegionShift))
+ .localPlayers.add(player);
+ }
+ for (final Entity entity : from.allEntities) {
+ final ChunkPos pos = entity.chunkPosition();
+ // Note: It is impossible for an entity in the world to _not_ be in an entity chunk, which means
+ // the chunk holder must _exist_, and so the region section exists.
+ final RegionizedWorldData into = regionToData.get(CoordinateUtils.getChunkKey(pos.x >> chunkToRegionShift, pos.z >> chunkToRegionShift));
+ into.allEntities.add(entity);
+ // Note: entityTickList is a subset of allEntities
+ if (from.entityTickList.contains(entity)) {
+ into.entityTickList.add(entity);
+ }
+ // Note: navigatingMobs is a subset of allEntities
+ if (entity instanceof Mob mob && from.navigatingMobs.contains(mob)) {
+ into.navigatingMobs.add(mob);
+ }
+ }
+ // block ticking
+ for (final BlockEventData blockEventData : from.blockEvents) {
+ final BlockPos pos = blockEventData.pos();
+ final int chunkX = pos.getX() >> 4;
+ final int chunkZ = pos.getZ() >> 4;
+
+ final RegionizedWorldData into = regionToData.get(CoordinateUtils.getChunkKey(chunkX >> chunkToRegionShift, chunkZ >> chunkToRegionShift));
+ // Unlike entities, the chunk holder is not guaranteed to exist for block events, because the block events
+ // is just some list. So if it unloads, I guess it's just lost.
+ if (into != null) {
+ into.blockEvents.add(blockEventData);
+ }
+ }
+
+ final Long2ReferenceOpenHashMap> levelTicksBlockRegionData = new Long2ReferenceOpenHashMap<>(regionToData.size(), 0.75f);
+ final Long2ReferenceOpenHashMap> levelTicksFluidRegionData = new Long2ReferenceOpenHashMap<>(regionToData.size(), 0.75f);
+
+ for (final Iterator> iterator = regionToData.long2ReferenceEntrySet().fastIterator();
+ iterator.hasNext();) {
+ final Long2ReferenceMap.Entry entry = iterator.next();
+ final long key = entry.getLongKey();
+ final RegionizedWorldData worldData = entry.getValue();
+
+ levelTicksBlockRegionData.put(key, worldData.blockLevelTicks);
+ levelTicksFluidRegionData.put(key, worldData.fluidLevelTicks);
+ }
+
+ from.blockLevelTicks.split(chunkToRegionShift, levelTicksBlockRegionData);
+ from.fluidLevelTicks.split(chunkToRegionShift, levelTicksFluidRegionData);
+
+ // tile entity ticking
+ for (final TickingBlockEntity tileEntity : from.pendingBlockEntityTickers) {
+ final BlockPos pos = tileEntity.getPos();
+ final int chunkX = pos.getX() >> 4;
+ final int chunkZ = pos.getZ() >> 4;
+
+ final RegionizedWorldData into = regionToData.get(CoordinateUtils.getChunkKey(chunkX >> chunkToRegionShift, chunkZ >> chunkToRegionShift));
+ if (into != null) {
+ into.pendingBlockEntityTickers.add(tileEntity);
+ } // else: when a chunk unloads, it does not actually _remove_ the tile entity from the list, it just gets
+ // marked as removed. So if there is no section, it's probably removed!
+ }
+ for (final TickingBlockEntity tileEntity : from.blockEntityTickers) {
+ final BlockPos pos = tileEntity.getPos();
+ final int chunkX = pos.getX() >> 4;
+ final int chunkZ = pos.getZ() >> 4;
+
+ final RegionizedWorldData into = regionToData.get(CoordinateUtils.getChunkKey(chunkX >> chunkToRegionShift, chunkZ >> chunkToRegionShift));
+ if (into != null) {
+ into.blockEntityTickers.add(tileEntity);
+ } // else: when a chunk unloads, it does not actually _remove_ the tile entity from the list, it just gets
+ // marked as removed. So if there is no section, it's probably removed!
+ }
+ // time
+ for (final RegionizedWorldData regionizedWorldData : dataSet) {
+ regionizedWorldData.redstoneTime = from.redstoneTime;
+ }
+ // ticking chunks
+ for (final Iterator iterator = from.entityTickingChunks.unsafeIterator(); iterator.hasNext();) {
+ final LevelChunk levelChunk = iterator.next();
+ final ChunkPos pos = levelChunk.getPos();
+
+ // Impossible for get() to return null, as the chunk is entity ticking - thus the chunk holder is loaded
+ regionToData.get(CoordinateUtils.getChunkKey(pos.x >> chunkToRegionShift, pos.z >> chunkToRegionShift))
+ .entityTickingChunks.add(levelChunk);
+ }
+ // redstone torches
+ if (from.redstoneUpdateInfos != null && !from.redstoneUpdateInfos.isEmpty()) {
+ for (final net.minecraft.world.level.block.RedstoneTorchBlock.Toggle info : from.redstoneUpdateInfos) {
+ final BlockPos pos = info.pos;
+
+ final RegionizedWorldData worldData = regionToData.get(CoordinateUtils.getChunkKey((pos.getX() >> 4) >> chunkToRegionShift, (pos.getZ() >> 4) >> chunkToRegionShift));
+ if (worldData != null) {
+ if (worldData.redstoneUpdateInfos == null) {
+ worldData.redstoneUpdateInfos = new ArrayDeque<>();
+ }
+ worldData.redstoneUpdateInfos.add(info);
+ } // else: chunk unloaded
+ }
+ }
+ // light chunks being worked on
+ for (final Iterator iterator = from.chunksBeingWorkedOn.long2IntEntrySet().fastIterator(); iterator.hasNext();) {
+ final Long2IntOpenHashMap.Entry entry = iterator.next();
+ final long pos = entry.getLongKey();
+ final int chunkX = CoordinateUtils.getChunkX(pos);
+ final int chunkZ = CoordinateUtils.getChunkZ(pos);
+ final int value = entry.getIntValue();
+
+ // should never be null, as it is a reference counter for ticket
+ regionToData.get(CoordinateUtils.getChunkKey(chunkX >> chunkToRegionShift, chunkZ >> chunkToRegionShift)).chunksBeingWorkedOn.put(pos, value);
+ }
+ // mob spawning
+ for (final RegionizedWorldData regionizedWorldData : dataSet) {
+ regionizedWorldData.catSpawnerNextTick = from.catSpawnerNextTick;
+ regionizedWorldData.patrolSpawnerNextTick = from.patrolSpawnerNextTick;
+ regionizedWorldData.phantomSpawnerNextTick = from.phantomSpawnerNextTick;
+ regionizedWorldData.wanderingTraderTickDelay = from.wanderingTraderTickDelay;
+ regionizedWorldData.wanderingTraderSpawnChance = from.wanderingTraderSpawnChance;
+ regionizedWorldData.wanderingTraderSpawnDelay = from.wanderingTraderSpawnDelay;
+ regionizedWorldData.villageSiegeState = new VillageSiegeState(); // just re set it, as the spawn pos will be invalid
+ }
+ }
+ };
+
+ public final ServerLevel world;
+
+ private RegionizedServer.WorldLevelData tickData;
+
+ // connections
+ public final List connections = new ArrayList<>();
+
+ // misc. fields
+ private boolean isHandlingTick;
+
+ public void setHandlingTick(final boolean to) {
+ this.isHandlingTick = to;
+ }
+
+ public boolean isHandlingTick() {
+ return this.isHandlingTick;
+ }
+
+ // entities
+ private final List localPlayers = new ArrayList<>();
+ private final ReferenceList allEntities = new ReferenceList<>();
+ private final IteratorSafeOrderedReferenceSet entityTickList = new IteratorSafeOrderedReferenceSet<>();
+ private final IteratorSafeOrderedReferenceSet navigatingMobs = new IteratorSafeOrderedReferenceSet<>();
+
+ // block ticking
+ private final ObjectLinkedOpenHashSet blockEvents = new ObjectLinkedOpenHashSet<>();
+ private final LevelTicks blockLevelTicks;
+ private final LevelTicks fluidLevelTicks;
+
+ // tile entity ticking
+ private final List pendingBlockEntityTickers = new ArrayList<>();
+ private final List blockEntityTickers = new ArrayList<>();
+ private boolean tickingBlockEntities;
+
+ // time
+ private long redstoneTime = 1L;
+
+ public long getRedstoneGameTime() {
+ return this.redstoneTime;
+ }
+
+ public void setRedstoneGameTime(final long to) {
+ this.redstoneTime = to;
+ }
+
+ // ticking chunks
+ private final IteratorSafeOrderedReferenceSet entityTickingChunks = new IteratorSafeOrderedReferenceSet<>();
+ private final IteratorSafeOrderedReferenceSet chunks = new IteratorSafeOrderedReferenceSet<>();
+
+ // Paper/CB api hook misc
+ // don't bother to merge/split these, no point
+ // From ServerLevel
+ public boolean hasPhysicsEvent = true; // Paper
+ public boolean hasEntityMoveEvent = false; // Paper
+ // Paper start - Optimize Hoppers
+ public boolean skipPullModeEventFire = false;
+ public boolean skipPushModeEventFire = false;
+ public boolean skipHopperEvents = false;
+ // Paper end - Optimize Hoppers
+ public long lastMidTickExecuteFailure;
+ public long lastMidTickExecute;
+ // From Level
+ public boolean populating;
+ public final NeighborUpdater neighborUpdater;
+ public boolean preventPoiUpdated = false; // CraftBukkit - SPIGOT-5710
+ public boolean captureBlockStates = false;
+ public boolean captureTreeGeneration = false;
+ public final Map capturedBlockStates = new java.util.LinkedHashMap<>(); // Paper
+ public final Map capturedTileEntities = new java.util.LinkedHashMap<>(); // Paper
+ public List captureDrops;
+ // Paper start
+ public int wakeupInactiveRemainingAnimals;
+ public int wakeupInactiveRemainingFlying;
+ public int wakeupInactiveRemainingMonsters;
+ public int wakeupInactiveRemainingVillagers;
+ // Paper end
+ public final TempCollisionList tempCollisionList = new TempCollisionList<>();
+ public final TempCollisionList tempEntitiesList = new TempCollisionList<>();
+ public int currentPrimedTnt = 0; // Spigot
+ @Nullable
+ @VisibleForDebug
+ public NaturalSpawner.SpawnState lastSpawnState;
+ public boolean shouldSignal = true;
+
+ // not transient
+ public java.util.ArrayDeque redstoneUpdateInfos;
+ public final Long2IntOpenHashMap chunksBeingWorkedOn = new Long2IntOpenHashMap();
+
+ public static final class TempCollisionList {
+ final UnsafeList list = new UnsafeList<>(64);
+ boolean inUse;
+
+ public UnsafeList get() {
+ if (this.inUse) {
+ return new UnsafeList<>(16);
+ }
+ this.inUse = true;
+ return this.list;
+ }
+
+ public void ret(List list) {
+ if (list != this.list) {
+ return;
+ }
+
+ ((UnsafeList)list).setSize(0);
+ this.inUse = false;
+ }
+
+ public void reset() {
+ this.list.completeReset();
+ }
+ }
+ public void resetCollisionLists() {
+ this.tempCollisionList.reset();
+ this.tempEntitiesList.reset();
+ }
+
+ // Mob spawning
+ private final PooledLinkedHashSets pooledHashSets = new PooledLinkedHashSets<>();
+ public final PlayerAreaMap mobSpawnMap = new PlayerAreaMap(this.pooledHashSets);
+ public int catSpawnerNextTick = 0;
+ public int patrolSpawnerNextTick = 0;
+ public int phantomSpawnerNextTick = 0;
+ public int wanderingTraderTickDelay = Integer.MIN_VALUE;
+ public int wanderingTraderSpawnDelay;
+ public int wanderingTraderSpawnChance;
+ public VillageSiegeState villageSiegeState = new VillageSiegeState();
+
+ public static final class VillageSiegeState {
+ public boolean hasSetupSiege;
+ public VillageSiege.State siegeState = VillageSiege.State.SIEGE_DONE;
+ public int zombiesToSpawn;
+ public int nextSpawnTime;
+ public int spawnX;
+ public int spawnY;
+ public int spawnZ;
+ }
+
+ public RegionizedWorldData(final ServerLevel world) {
+ this.world = world;
+ this.blockLevelTicks = new LevelTicks<>(world::isPositionTickingWithEntitiesLoaded, world.getProfilerSupplier(), world, true);
+ this.fluidLevelTicks = new LevelTicks<>(world::isPositionTickingWithEntitiesLoaded, world.getProfilerSupplier(), world, false);
+ this.neighborUpdater = new CollectingNeighborUpdater(world, world.neighbourUpdateMax);
+
+ // tasks may be drained before the region ticks, so we must set up the tick data early just in case
+ this.updateTickData();
+ }
+
+ public void checkWorld(final Level against) {
+ if (this.world != against) {
+ throw new IllegalStateException("World mismatch: expected " + this.world.getWorld().getName() + " but got " + (against == null ? "null" : against.getWorld().getName()));
+ }
+ }
+
+ public RegionizedServer.WorldLevelData getTickData() {
+ return this.tickData;
+ }
+
+ public void updateTickData() {
+ this.tickData = this.world.tickData;
+ this.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper
+ this.hasEntityMoveEvent = io.papermc.paper.event.entity.EntityMoveEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper
+ this.skipHopperEvents = this.world.paperConfig().hopper.disableMoveEvent || org.bukkit.event.inventory.InventoryMoveItemEvent.getHandlerList().getRegisteredListeners().length == 0; // Paper
+ }
+
+ // connections
+ public void tickConnections() {
+ final List connections = new ArrayList<>(this.connections);
+ Collections.shuffle(connections);
+ for (final Connection conn : connections) {
+ if (!conn.isConnected()) {
+ conn.handleDisconnection();
+ this.connections.remove(conn);
+ // note: ALL connections HERE have a player
+ final ServerPlayer player = conn.getPlayer();
+ // now that the connection is removed, we can allow this region to die
+ player.serverLevel().chunkSource.removeTicketAtLevel(
+ ServerGamePacketListenerImpl.DISCONNECT_TICKET, player.connection.disconnectPos,
+ ChunkHolderManager.MAX_TICKET_LEVEL,
+ player.connection.disconnectTicketId
+ );
+ continue;
+ }
+ if (!this.connections.contains(conn)) {
+ // removed by connection tick?
+ continue;
+ }
+
+ try {
+ conn.tick();
+ } catch (final Exception exception) {
+ if (conn.isMemoryConnection()) {
+ throw new ReportedException(CrashReport.forThrowable(exception, "Ticking memory connection"));
+ }
+
+ LOGGER.warn("Failed to handle packet for {}", io.papermc.paper.configuration.GlobalConfiguration.get().logging.logPlayerIpAddresses ? String.valueOf(conn.getRemoteAddress()) : "", exception); // Paper
+ MutableComponent ichatmutablecomponent = Component.literal("Internal server error");
+
+ conn.send(new ClientboundDisconnectPacket(ichatmutablecomponent), PacketSendListener.thenRun(() -> {
+ conn.disconnect(ichatmutablecomponent);
+ }));
+ conn.setReadOnly();
+ continue;
+ }
+ }
+ }
+
+ // entities hooks
+ public int getEntityCount() {
+ return this.allEntities.size();
+ }
+
+ public int getPlayerCount() {
+ return this.localPlayers.size();
+ }
+
+ public Iterable getLocalEntities() {
+ return this.allEntities;
+ }
+
+ public Entity[] getLocalEntitiesCopy() {
+ return Arrays.copyOf(this.allEntities.getRawData(), this.allEntities.size(), Entity[].class);
+ }
+
+ public List getLocalPlayers() {
+ return this.localPlayers;
+ }
+
+ public void addEntityTickingEntity(final Entity entity) {
+ if (!TickThread.isTickThreadFor(entity)) {
+ throw new IllegalArgumentException("Entity " + entity + " is not under this region's control");
+ }
+ this.entityTickList.add(entity);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public boolean hasEntityTickingEntity(final Entity entity) {
+ return this.entityTickList.contains(entity);
+ }
+
+ public void removeEntityTickingEntity(final Entity entity) {
+ if (!TickThread.isTickThreadFor(entity)) {
+ throw new IllegalArgumentException("Entity " + entity + " is not under this region's control");
+ }
+ this.entityTickList.remove(entity);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public void forEachTickingEntity(final Consumer action) {
+ final IteratorSafeOrderedReferenceSet.Iterator iterator = this.entityTickList.iterator();
+ try {
+ while (iterator.hasNext()) {
+ action.accept(iterator.next());
+ }
+ } finally {
+ iterator.finishedIterating();
+ }
+ }
+
+ public void addEntity(final Entity entity) {
+ if (!TickThread.isTickThreadFor(this.world, entity.chunkPosition())) {
+ throw new IllegalArgumentException("Entity " + entity + " is not under this region's control");
+ }
+ if (this.allEntities.add(entity)) {
+ if (entity instanceof ServerPlayer player) {
+ this.localPlayers.add(player);
+ }
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+ }
+
+ public boolean hasEntity(final Entity entity) {
+ return this.allEntities.contains(entity);
+ }
+
+ public void removeEntity(final Entity entity) {
+ if (!TickThread.isTickThreadFor(entity)) {
+ throw new IllegalArgumentException("Entity " + entity + " is not under this region's control");
+ }
+ if (this.allEntities.remove(entity)) {
+ if (entity instanceof ServerPlayer player) {
+ this.localPlayers.remove(player);
+ }
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+ }
+
+ public void addNavigatingMob(final Mob mob) {
+ if (!TickThread.isTickThreadFor(mob)) {
+ throw new IllegalArgumentException("Entity " + mob + " is not under this region's control");
+ }
+ this.navigatingMobs.add(mob);
+ }
+
+ public void removeNavigatingMob(final Mob mob) {
+ if (!TickThread.isTickThreadFor(mob)) {
+ throw new IllegalArgumentException("Entity " + mob + " is not under this region's control");
+ }
+ this.navigatingMobs.remove(mob);
+ }
+
+ public Iterator getNavigatingMobs() {
+ return this.navigatingMobs.unsafeIterator();
+ }
+
+ // block ticking hooks
+ // Since block event data does not require chunk holders to be created for the chunk they reside in,
+ // it's not actually guaranteed that when merging / splitting data that we actually own the data...
+ // Note that we can only ever not own the event data when the chunk unloads, and so I've decided to
+ // make the code easier by simply discarding it in such an event
+ public void pushBlockEvent(final BlockEventData blockEventData) {
+ TickThread.ensureTickThread(this.world, blockEventData.pos(), "Cannot queue block even data async");
+ this.blockEvents.add(blockEventData);
+ }
+
+ public void pushBlockEvents(final Collection extends BlockEventData> blockEvents) {
+ for (final BlockEventData blockEventData : blockEvents) {
+ this.pushBlockEvent(blockEventData);
+ }
+ }
+
+ public void removeIfBlockEvents(final Predicate super BlockEventData> predicate) {
+ for (final Iterator iterator = this.blockEvents.iterator(); iterator.hasNext();) {
+ final BlockEventData blockEventData = iterator.next();
+ if (predicate.test(blockEventData)) {
+ iterator.remove();
+ }
+ }
+ }
+
+ public BlockEventData removeFirstBlockEvent() {
+ BlockEventData ret;
+ while (!this.blockEvents.isEmpty()) {
+ ret = this.blockEvents.removeFirst();
+ if (TickThread.isTickThreadFor(this.world, ret.pos())) {
+ return ret;
+ } // else: chunk must have been unloaded
+ }
+
+ return null;
+ }
+
+ public LevelTicks getBlockLevelTicks() {
+ return this.blockLevelTicks;
+ }
+
+ public LevelTicks getFluidLevelTicks() {
+ return this.fluidLevelTicks;
+ }
+
+ // tile entity ticking
+ public void addBlockEntityTicker(final TickingBlockEntity ticker) {
+ TickThread.ensureTickThread(this.world, ticker.getPos(), "Tile entity must be owned by current region");
+
+ (this.tickingBlockEntities ? this.pendingBlockEntityTickers : this.blockEntityTickers).add(ticker);
+ }
+
+ public void seTtickingBlockEntities(final boolean to) {
+ this.tickingBlockEntities = true;
+ }
+
+ public List getBlockEntityTickers() {
+ return this.blockEntityTickers;
+ }
+
+ public void pushPendingTickingBlockEntities() {
+ if (!this.pendingBlockEntityTickers.isEmpty()) {
+ this.blockEntityTickers.addAll(this.pendingBlockEntityTickers);
+ this.pendingBlockEntityTickers.clear();
+ }
+ }
+
+ // ticking chunks
+ public void addEntityTickingChunk(final LevelChunk levelChunk) {
+ this.entityTickingChunks.add(levelChunk);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public void removeEntityTickingChunk(final LevelChunk levelChunk) {
+ this.entityTickingChunks.remove(levelChunk);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public IteratorSafeOrderedReferenceSet getEntityTickingChunks() {
+ return this.entityTickingChunks;
+ }
+
+ public void addChunk(final LevelChunk levelChunk) {
+ this.chunks.add(levelChunk);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public void removeChunk(final LevelChunk levelChunk) {
+ this.chunks.remove(levelChunk);
+ TickRegions.RegionStats.updateCurrentRegion();
+ }
+
+ public IteratorSafeOrderedReferenceSet getChunks() {
+ return this.chunks;
+ }
+
+ public int getEntityTickingChunkCount() {
+ return this.entityTickingChunks.size();
+ }
+
+ public int getChunkCount() {
+ return this.chunks.size();
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/Schedule.java b/src/main/java/io/papermc/paper/threadedregions/Schedule.java
new file mode 100644
index 0000000000000000000000000000000000000000..112d24a93bddf3d81c9176c05340c94ecd1a40a3
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/Schedule.java
@@ -0,0 +1,91 @@
+package io.papermc.paper.threadedregions;
+
+/**
+ * A Schedule is an object that can be used to maintain a periodic schedule for an event of interest.
+ */
+public final class Schedule {
+
+ private long lastPeriod;
+
+ /**
+ * Initialises a schedule with the provided period.
+ * @param firstPeriod The last time an event of interest occurred.
+ * @see #setLastPeriod(long)
+ */
+ public Schedule(final long firstPeriod) {
+ this.lastPeriod = firstPeriod;
+ }
+
+ /**
+ * Updates the last period to the specified value. This call sets the last "time" the event
+ * of interest took place at. Thus, the value returned by {@link #getDeadline(long)} is
+ * the provided time plus the period length provided to {@code getDeadline}.
+ * @param value The value to set the last period to.
+ */
+ public void setLastPeriod(final long value) {
+ this.lastPeriod = value;
+ }
+
+ /**
+ * Returns the last time the event of interest should have taken place.
+ */
+ public long getLastPeriod() {
+ return this.lastPeriod;
+ }
+
+ /**
+ * Returns the number of times the event of interest should have taken place between the last
+ * period and the provided time given the period between each event.
+ * @param periodLength The length of the period between events in ns.
+ * @param time The provided time.
+ */
+ public int getPeriodsAhead(final long periodLength, final long time) {
+ final long difference = time - this.lastPeriod;
+ final int ret = (int)(Math.abs(difference) / periodLength);
+ return difference >= 0 ? ret : -ret;
+ }
+
+ /**
+ * Returns the next starting deadline for the event of interest to take place,
+ * given the provided period length.
+ * @param periodLength The provided period length.
+ */
+ public long getDeadline(final long periodLength) {
+ return this.lastPeriod + periodLength;
+ }
+
+ /**
+ * Adjusts the last period so that the next starting deadline returned is the next period specified,
+ * given the provided period length.
+ * @param nextPeriod The specified next starting deadline.
+ * @param periodLength The specified period length.
+ */
+ public void setNextPeriod(final long nextPeriod, final long periodLength) {
+ this.lastPeriod = nextPeriod - periodLength;
+ }
+
+ /**
+ * Increases the last period by the specified number of periods and period length.
+ * The specified number of periods may be < 0, in which case the last period
+ * will decrease.
+ * @param periods The specified number of periods.
+ * @param periodLength The specified period length.
+ */
+ public void advanceBy(final int periods, final long periodLength) {
+ this.lastPeriod += (long)periods * periodLength;
+ }
+
+ /**
+ * Sets the last period so that it is the specified number of periods ahead
+ * given the specified time and period length.
+ * @param periodsToBeAhead Specified number of periods to be ahead by.
+ * @param periodLength The specified period length.
+ * @param time The specified time.
+ */
+ public void setPeriodsAhead(final int periodsToBeAhead, final long periodLength, final long time) {
+ final int periodsAhead = this.getPeriodsAhead(periodLength, time);
+ final int periodsToAdd = periodsToBeAhead - periodsAhead;
+
+ this.lastPeriod -= (long)periodsToAdd * periodLength;
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/TeleportUtils.java b/src/main/java/io/papermc/paper/threadedregions/TeleportUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..84b4ff07735fb84e28ee8966ffdedb1bb3d07dff
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/TeleportUtils.java
@@ -0,0 +1,60 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.completable.Completable;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.phys.Vec3;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.event.player.PlayerTeleportEvent;
+import java.util.function.Consumer;
+
+public final class TeleportUtils {
+
+ public static void teleport(final Entity from, final boolean useFromRootVehicle, final Entity to, final Float yaw, final Float pitch,
+ final long teleportFlags, final PlayerTeleportEvent.TeleportCause cause, final Consumer onComplete) {
+ // retrieve coordinates
+ final Completable positionCompletable = new Completable<>();
+
+ positionCompletable.addWaiter(
+ (final Location loc, final Throwable thr) -> {
+ if (loc == null) {
+ onComplete.accept(null);
+ return;
+ }
+ final boolean scheduled = from.getBukkitEntity().taskScheduler.schedule(
+ (final Entity realFrom) -> {
+ final Vec3 pos = new Vec3(
+ loc.getX(), loc.getY(), loc.getZ()
+ );
+ (useFromRootVehicle ? realFrom.getRootVehicle() : realFrom).teleportAsync(
+ ((CraftWorld)loc.getWorld()).getHandle(), pos, null, null, null,
+ cause, teleportFlags, onComplete
+ );
+ },
+ (final Entity retired) -> {
+ onComplete.accept(null);
+ },
+ 1L
+ );
+ if (!scheduled) {
+ onComplete.accept(null);
+ }
+ }
+ );
+
+ final boolean scheduled = to.getBukkitEntity().taskScheduler.schedule(
+ (final Entity target) -> {
+ positionCompletable.complete(target.getBukkitEntity().getLocation());
+ },
+ (final Entity retired) -> {
+ onComplete.accept(null);
+ },
+ 1L
+ );
+ if (!scheduled) {
+ onComplete.accept(null);
+ }
+ }
+
+ private TeleportUtils() {}
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/ThreadedRegionizer.java b/src/main/java/io/papermc/paper/threadedregions/ThreadedRegionizer.java
new file mode 100644
index 0000000000000000000000000000000000000000..72a2b81a0a4dc6aab02d0dbad713ea882887d85f
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/ThreadedRegionizer.java
@@ -0,0 +1,1328 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.map.SWMRLong2ObjectHashTable;
+import ca.spottedleaf.concurrentutil.util.ConcurrentUtil;
+import com.destroystokyo.paper.util.SneakyThrow;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.CoordinateUtils;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.longs.LongArrayList;
+import it.unimi.dsi.fastutil.longs.LongComparator;
+import it.unimi.dsi.fastutil.longs.LongIterator;
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
+import net.minecraft.core.BlockPos;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.ChunkPos;
+import org.slf4j.Logger;
+import java.lang.invoke.VarHandle;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.locks.StampedLock;
+import java.util.function.BooleanSupplier;
+import java.util.function.Consumer;
+
+public final class ThreadedRegionizer, S extends ThreadedRegionizer.ThreadedRegionSectionData> {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+
+ public final int regionSectionChunkSize;
+ public final int sectionChunkShift;
+ public final int minSectionRecalcCount;
+ public final int emptySectionCreateRadius;
+ public final int regionSectionMergeRadius;
+ public final double maxDeadRegionPercent;
+ public final ServerLevel world;
+
+ private final SWMRLong2ObjectHashTable> sections = new SWMRLong2ObjectHashTable<>();
+ private final SWMRLong2ObjectHashTable> regionsById = new SWMRLong2ObjectHashTable<>();
+ private final RegionCallbacks callbacks;
+ private final StampedLock regionLock = new StampedLock();
+ private Thread writeLockOwner;
+
+ /*
+ static final record Operation(String type, int chunkX, int chunkZ) {}
+ private final MultiThreadedQueue ops = new MultiThreadedQueue<>();
+ */
+
+ /*
+ * See REGION_LOGIC.md for complete details on what this class is doing
+ */
+
+ public ThreadedRegionizer(final int minSectionRecalcCount, final double maxDeadRegionPercent,
+ final int emptySectionCreateRadius, final int regionSectionMergeRadius,
+ final int regionSectionChunkShift, final ServerLevel world,
+ final RegionCallbacks callbacks) {
+ if (emptySectionCreateRadius <= 0) {
+ throw new IllegalStateException("Region section create radius must be > 0");
+ }
+ if (regionSectionMergeRadius <= 0) {
+ throw new IllegalStateException("Region section merge radius must be > 0");
+ }
+ this.regionSectionChunkSize = 1 << regionSectionChunkShift;
+ this.sectionChunkShift = regionSectionChunkShift;
+ this.minSectionRecalcCount = Math.max(2, minSectionRecalcCount);
+ this.maxDeadRegionPercent = maxDeadRegionPercent;
+ this.emptySectionCreateRadius = emptySectionCreateRadius;
+ this.regionSectionMergeRadius = regionSectionMergeRadius;
+ this.world = world;
+ this.callbacks = callbacks;
+ //this.loadTestData();
+ }
+
+ /*
+ private static String substr(String val, String prefix, int from) {
+ int idx = val.indexOf(prefix, from) + prefix.length();
+ int idx2 = val.indexOf(',', idx);
+ if (idx2 == -1) {
+ idx2 = val.indexOf(']', idx);
+ }
+ return val.substring(idx, idx2);
+ }
+
+ private void loadTestData() {
+ if (true) {
+ return;
+ }
+ try {
+ final JsonArray arr = JsonParser.parseReader(new FileReader("test.json")).getAsJsonArray();
+
+ List ops = new ArrayList<>();
+
+ for (JsonElement elem : arr) {
+ JsonObject obj = elem.getAsJsonObject();
+ String val = obj.get("value").getAsString();
+
+ String type = substr(val, "type=", 0);
+ String x = substr(val, "chunkX=", 0);
+ String z = substr(val, "chunkZ=", 0);
+
+ ops.add(new Operation(type, Integer.parseInt(x), Integer.parseInt(z)));
+ }
+
+ for (Operation op : ops) {
+ switch (op.type) {
+ case "add": {
+ this.addChunk(op.chunkX, op.chunkZ);
+ break;
+ }
+ case "remove": {
+ this.removeChunk(op.chunkX, op.chunkZ);
+ break;
+ }
+ case "mark_ticking": {
+ this.sections.get(CoordinateUtils.getChunkKey(op.chunkX, op.chunkZ)).region.tryMarkTicking();
+ break;
+ }
+ case "rel_region": {
+ if (this.sections.get(CoordinateUtils.getChunkKey(op.chunkX, op.chunkZ)).region.state == ThreadedRegion.STATE_TICKING) {
+ this.sections.get(CoordinateUtils.getChunkKey(op.chunkX, op.chunkZ)).region.markNotTicking();
+ }
+ break;
+ }
+ }
+ }
+
+ } catch (final Exception ex) {
+ throw new IllegalStateException(ex);
+ }
+ }
+ */
+
+ public void acquireReadLock() {
+ this.regionLock.readLock();
+ }
+
+ public void releaseReadLock() {
+ this.regionLock.tryUnlockRead();
+ }
+
+ private void acquireWriteLock() {
+ final Thread currentThread = Thread.currentThread();
+ if (this.writeLockOwner == currentThread) {
+ throw new IllegalStateException("Cannot recursively operate in the regioniser");
+ }
+ this.regionLock.writeLock();
+ this.writeLockOwner = currentThread;
+ }
+
+ private void releaseWriteLock() {
+ this.writeLockOwner = null;
+ this.regionLock.tryUnlockWrite();
+ }
+
+ private void onRegionCreate(final ThreadedRegion region) {
+ final ThreadedRegion conflict;
+ if ((conflict = this.regionsById.putIfAbsent(region.id, region)) != null) {
+ throw new IllegalStateException("Region " + region + " is already mapped to " + conflict);
+ }
+ }
+
+ private void onRegionDestroy(final ThreadedRegion region) {
+ final ThreadedRegion removed = this.regionsById.remove(region.id);
+ if (removed != region) {
+ throw new IllegalStateException("Expected to remove " + region + ", but removed " + removed);
+ }
+ }
+
+ public int getSectionCoordinate(final int chunkCoordinate) {
+ return chunkCoordinate >> this.sectionChunkShift;
+ }
+
+ public long getSectionKey(final BlockPos pos) {
+ return CoordinateUtils.getChunkKey((pos.getX() >> 4) >> this.sectionChunkShift, (pos.getZ() >> 4) >> this.sectionChunkShift);
+ }
+
+ public long getSectionKey(final ChunkPos pos) {
+ return CoordinateUtils.getChunkKey(pos.x >> this.sectionChunkShift, pos.z >> this.sectionChunkShift);
+ }
+
+ public long getSectionKey(final Entity entity) {
+ final ChunkPos pos = entity.chunkPosition();
+ return CoordinateUtils.getChunkKey(pos.x >> this.sectionChunkShift, pos.z >> this.sectionChunkShift);
+ }
+
+ public void computeForAllRegions(final Consumer super ThreadedRegion> consumer) {
+ this.regionLock.readLock();
+ try {
+ this.regionsById.forEachValue(consumer);
+ } finally {
+ this.regionLock.tryUnlockRead();
+ }
+ }
+
+ public void computeForAllRegionsUnsynchronised(final Consumer super ThreadedRegion> consumer) {
+ this.regionsById.forEachValue(consumer);
+ }
+
+ public ThreadedRegion getRegionAtUnsynchronised(final int chunkX, final int chunkZ) {
+ final int sectionX = chunkX >> this.sectionChunkShift;
+ final int sectionZ = chunkZ >> this.sectionChunkShift;
+ final long sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+
+ final ThreadedRegionSection section = this.sections.get(sectionKey);
+
+ return section == null ? null : section.getRegion();
+ }
+
+ public ThreadedRegion getRegionAtSynchronised(final int chunkX, final int chunkZ) {
+ final int sectionX = chunkX >> this.sectionChunkShift;
+ final int sectionZ = chunkZ >> this.sectionChunkShift;
+ final long sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+
+ // try an optimistic read
+ {
+ final long readAttempt = this.regionLock.tryOptimisticRead();
+ final ThreadedRegionSection optimisticSection = this.sections.get(sectionKey);
+ final ThreadedRegion optimisticRet =
+ optimisticSection == null ? null : optimisticSection.getRegionPlain();
+ if (this.regionLock.validate(readAttempt)) {
+ return optimisticRet;
+ }
+ }
+
+ // failed, fall back to acquiring the lock
+ this.regionLock.readLock();
+ try {
+ final ThreadedRegionSection section = this.sections.get(sectionKey);
+
+ return section == null ? null : section.getRegionPlain();
+ } finally {
+ this.regionLock.tryUnlockRead();
+ }
+ }
+
+ /**
+ * Adds a chunk to the regioniser. Note that it is illegal to add a chunk unless
+ * addChunk has not been called for it or removeChunk has been previously called.
+ *
+ *
+ * Note that it is illegal to additionally call addChunk or removeChunk for the same
+ * region section in parallel.
+ *
+ */
+ public void addChunk(final int chunkX, final int chunkZ) {
+ final int sectionX = chunkX >> this.sectionChunkShift;
+ final int sectionZ = chunkZ >> this.sectionChunkShift;
+ final long sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+
+ // Given that for each section, no addChunk/removeChunk can occur in parallel,
+ // we can avoid the lock IF the section exists AND it has a non-zero chunk count.
+ {
+ final ThreadedRegionSection existing = this.sections.get(sectionKey);
+ if (existing != null && !existing.isEmpty()) {
+ existing.addChunk(chunkX, chunkZ);
+ return;
+ } // else: just acquire the write lock
+ }
+
+ this.acquireWriteLock();
+ try {
+ ThreadedRegionSection section = this.sections.get(sectionKey);
+
+ List> newSections = new ArrayList<>();
+
+ if (section == null) {
+ // no section at all
+ section = new ThreadedRegionSection<>(sectionX, sectionZ, this, chunkX, chunkZ);
+ this.sections.put(sectionKey, section);
+ newSections.add(section);
+ } else {
+ section.addChunk(chunkX, chunkZ);
+ }
+ // due to the fast check from above, we know the section is empty whether we needed to create it or not
+
+ // enforce the adjacency invariant by creating / updating neighbour sections
+ final int createRadius = this.emptySectionCreateRadius;
+ final int searchRadius = createRadius + this.regionSectionMergeRadius;
+ ReferenceOpenHashSet> nearbyRegions = null;
+ for (int dx = -searchRadius; dx <= searchRadius; ++dx) {
+ for (int dz = -searchRadius; dz <= searchRadius; ++dz) {
+ if ((dx | dz) == 0) {
+ continue;
+ }
+ final int squareDistance = Math.max(Math.abs(dx), Math.abs(dz));
+ final boolean inCreateRange = squareDistance <= createRadius;
+
+ final int neighbourX = dx + sectionX;
+ final int neighbourZ = dz + sectionZ;
+ final long neighbourKey = CoordinateUtils.getChunkKey(neighbourX, neighbourZ);
+
+ ThreadedRegionSection neighbourSection = this.sections.get(neighbourKey);
+
+ if (neighbourSection != null) {
+ if (nearbyRegions == null) {
+ nearbyRegions = new ReferenceOpenHashSet<>(((searchRadius * 2 + 1) * (searchRadius * 2 + 1)) >> 1);
+ }
+ nearbyRegions.add(neighbourSection.getRegionPlain());
+ }
+
+ if (!inCreateRange) {
+ continue;
+ }
+
+ // we need to ensure the section exists
+ if (neighbourSection != null) {
+ // nothing else to do
+ neighbourSection.incrementNonEmptyNeighbours();
+ continue;
+ }
+ neighbourSection = new ThreadedRegionSection<>(neighbourX, neighbourZ, this, 1);
+ if (null != this.sections.put(neighbourKey, neighbourSection)) {
+ throw new IllegalStateException("Failed to insert new section");
+ }
+ newSections.add(neighbourSection);
+ }
+ }
+
+ if (newSections.isEmpty()) {
+ // if we didn't add any sections, then we don't need to merge any regions or create a region
+ return;
+ }
+
+ final ThreadedRegion regionOfInterest;
+ final boolean regionOfInterestAlive;
+ if (nearbyRegions == null) {
+ // we can simply create a new region, don't have neighbours to worry about merging into
+ regionOfInterest = new ThreadedRegion<>(this);
+ regionOfInterestAlive = true;
+
+ for (int i = 0, len = newSections.size(); i < len; ++i) {
+ regionOfInterest.addSection(newSections.get(i));
+ }
+
+ // only call create callback after adding sections
+ regionOfInterest.onCreate();
+ } else {
+ // need to merge the regions
+ ThreadedRegion firstUnlockedRegion = null;
+
+ for (final ThreadedRegion region : nearbyRegions) {
+ if (region.isTicking()) {
+ continue;
+ }
+ firstUnlockedRegion = region;
+ if (firstUnlockedRegion.state == ThreadedRegion.STATE_READY && (!firstUnlockedRegion.mergeIntoLater.isEmpty() || !firstUnlockedRegion.expectingMergeFrom.isEmpty())) {
+ throw new IllegalStateException("Illegal state for unlocked region " + firstUnlockedRegion);
+ }
+ break;
+ }
+
+ if (firstUnlockedRegion != null) {
+ regionOfInterest = firstUnlockedRegion;
+ } else {
+ regionOfInterest = new ThreadedRegion<>(this);
+ }
+
+ for (int i = 0, len = newSections.size(); i < len; ++i) {
+ regionOfInterest.addSection(newSections.get(i));
+ }
+
+ // only call create callback after adding sections
+ if (firstUnlockedRegion == null) {
+ regionOfInterest.onCreate();
+ }
+
+ if (firstUnlockedRegion != null && nearbyRegions.size() == 1) {
+ // nothing to do further, no need to merge anything
+ return;
+ }
+
+ // we need to now tell all the other regions to merge into the region we just created,
+ // and to merge all the ones we can immediately
+
+ for (final ThreadedRegion region : nearbyRegions) {
+ if (region == regionOfInterest) {
+ continue;
+ }
+ // need the relaxed check, as the region may already be
+ // a merge target
+ if (!region.tryKill()) {
+ regionOfInterest.mergeIntoLater(region);
+ } else {
+ region.mergeInto(regionOfInterest);
+ }
+ }
+
+ if (firstUnlockedRegion != null && firstUnlockedRegion.state == ThreadedRegion.STATE_READY) {
+ // we need to retire this region if the merges added other pending merges
+ if (!firstUnlockedRegion.mergeIntoLater.isEmpty() || !firstUnlockedRegion.expectingMergeFrom.isEmpty()) {
+ firstUnlockedRegion.state = ThreadedRegion.STATE_TRANSIENT;
+ this.callbacks.onRegionInactive(firstUnlockedRegion);
+ }
+ }
+
+ // need to set alive if we created it and there are no pending merges
+ regionOfInterestAlive = firstUnlockedRegion == null && regionOfInterest.mergeIntoLater.isEmpty() && regionOfInterest.expectingMergeFrom.isEmpty();
+ }
+
+ if (regionOfInterestAlive) {
+ regionOfInterest.state = ThreadedRegion.STATE_READY;
+ if (!regionOfInterest.mergeIntoLater.isEmpty() || !regionOfInterest.expectingMergeFrom.isEmpty()) {
+ throw new IllegalStateException("Should not happen on region " + this);
+ }
+ this.callbacks.onRegionActive(regionOfInterest);
+ }
+
+ if (regionOfInterest.state == ThreadedRegion.STATE_READY) {
+ if (!regionOfInterest.mergeIntoLater.isEmpty() || !regionOfInterest.expectingMergeFrom.isEmpty()) {
+ throw new IllegalStateException("Should not happen on region " + this);
+ }
+ }
+ } catch (final Throwable throwable) {
+ LOGGER.error("Failed to add chunk (" + chunkX + "," + chunkZ + ")", throwable);
+ SneakyThrow.sneaky(throwable);
+ return; // unreachable
+ } finally {
+ this.releaseWriteLock();
+ }
+ }
+
+ public void removeChunk(final int chunkX, final int chunkZ) {
+ final int sectionX = chunkX >> this.sectionChunkShift;
+ final int sectionZ = chunkZ >> this.sectionChunkShift;
+ final long sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+
+ // Given that for each section, no addChunk/removeChunk can occur in parallel,
+ // we can avoid the lock IF the section exists AND it has a chunk count > 1
+ final ThreadedRegionSection section = this.sections.get(sectionKey);
+ if (section == null) {
+ throw new IllegalStateException("Chunk (" + chunkX + "," + chunkZ + ") has no section");
+ }
+ if (!section.hasOnlyOneChunk()) {
+ // chunk will not go empty, so we don't need to acquire the lock
+ section.removeChunk(chunkX, chunkZ);
+ return;
+ }
+
+ this.acquireWriteLock();
+ try {
+ section.removeChunk(chunkX, chunkZ);
+
+ final int searchRadius = this.emptySectionCreateRadius;
+ for (int dx = -searchRadius; dx <= searchRadius; ++dx) {
+ for (int dz = -searchRadius; dz <= searchRadius; ++dz) {
+ if ((dx | dz) == 0) {
+ continue;
+ }
+
+ final int neighbourX = dx + sectionX;
+ final int neighbourZ = dz + sectionZ;
+ final long neighbourKey = CoordinateUtils.getChunkKey(neighbourX, neighbourZ);
+
+ final ThreadedRegionSection neighbourSection = this.sections.get(neighbourKey);
+
+ // should be non-null here always
+ neighbourSection.decrementNonEmptyNeighbours();
+ }
+ }
+ } catch (final Throwable throwable) {
+ LOGGER.error("Failed to add chunk (" + chunkX + "," + chunkZ + ")", throwable);
+ SneakyThrow.sneaky(throwable);
+ return; // unreachable
+ } finally {
+ this.releaseWriteLock();
+ }
+ }
+
+ // must hold regionLock
+ private void onRegionRelease(final ThreadedRegion region) {
+ if (!region.mergeIntoLater.isEmpty()) {
+ throw new IllegalStateException("Region " + region + " should not have any regions to merge into!");
+ }
+
+ final boolean hasExpectingMerges = !region.expectingMergeFrom.isEmpty();
+
+ // is this region supposed to merge into any other region?
+ if (hasExpectingMerges) {
+ // merge the regions into this one
+ final ReferenceOpenHashSet> expectingMergeFrom = region.expectingMergeFrom.clone();
+ for (final ThreadedRegion mergeFrom : expectingMergeFrom) {
+ if (!mergeFrom.tryKill()) {
+ throw new IllegalStateException("Merge from region " + mergeFrom + " should be killable! Trying to merge into " + region);
+ }
+ mergeFrom.mergeInto(region);
+ }
+
+ if (!region.expectingMergeFrom.isEmpty()) {
+ throw new IllegalStateException("Region " + region + " should no longer have merge requests after mering from " + expectingMergeFrom);
+ }
+
+ if (!region.mergeIntoLater.isEmpty()) {
+ // There is another nearby ticking region that we need to merge into
+ region.state = ThreadedRegion.STATE_TRANSIENT;
+ this.callbacks.onRegionInactive(region);
+ // return to avoid removing dead sections or splitting, these actions will be performed
+ // by the region we merge into
+ return;
+ }
+ }
+
+ // now check whether we need to recalculate regions
+ final boolean removeDeadSections = hasExpectingMerges || region.hasNoAliveSections()
+ || (region.sectionByKey.size() >= this.minSectionRecalcCount && region.getDeadSectionPercent() >= this.maxDeadRegionPercent);
+ final boolean removedDeadSections = removeDeadSections && !region.deadSections.isEmpty();
+ if (removeDeadSections) {
+ // kill dead sections
+ for (final ThreadedRegionSection deadSection : region.deadSections) {
+ final long key = CoordinateUtils.getChunkKey(deadSection.sectionX, deadSection.sectionZ);
+
+ if (!deadSection.isEmpty()) {
+ throw new IllegalStateException("Dead section '" + deadSection.toStringWithRegion() + "' is marked dead but has chunks!");
+ }
+ if (deadSection.hasNonEmptyNeighbours()) {
+ throw new IllegalStateException("Dead section '" + deadSection.toStringWithRegion() + "' is marked dead but has non-empty neighbours!");
+ }
+ if (!region.sectionByKey.remove(key, deadSection)) {
+ throw new IllegalStateException("Region " + region + " has inconsistent state, it should contain section " + deadSection);
+ }
+ if (this.sections.remove(key) != deadSection) {
+ throw new IllegalStateException("Cannot remove dead section '" +
+ deadSection.toStringWithRegion() + "' from section state! State at section coordinate: " + this.sections.get(key));
+ }
+ }
+ region.deadSections.clear();
+ }
+
+ // if we removed dead sections, we should check if the region can be split into smaller ones
+ // otherwise, the region remains alive
+ if (!removedDeadSections) {
+ // didn't remove dead sections, don't check for split
+ region.state = ThreadedRegion.STATE_READY;
+ if (!region.expectingMergeFrom.isEmpty() || !region.mergeIntoLater.isEmpty()) {
+ throw new IllegalStateException("Illegal state " + region);
+ }
+ return;
+ }
+
+ // first, we need to build copy of coordinate->section map of all sections in recalculate
+ final Long2ReferenceOpenHashMap> recalculateSections = region.sectionByKey.clone();
+
+ if (recalculateSections.isEmpty()) {
+ // looks like the region's sections were all dead, and now there is no region at all
+ region.state = ThreadedRegion.STATE_DEAD;
+ region.onRemove(true);
+ return;
+ }
+
+ // merge radius is max, since recalculateSections includes the dead or empty sections
+ final int mergeRadius = Math.max(this.regionSectionMergeRadius, this.emptySectionCreateRadius);
+
+ final List>> newRegions = new ArrayList<>();
+ while (!recalculateSections.isEmpty()) {
+ // select any section, then BFS around it to find all of its neighbours to form a region
+ // once no more neighbours are found, the region is complete
+ final List> currRegion = new ArrayList<>();
+ final Iterator> firstIterator = recalculateSections.values().iterator();
+
+ currRegion.add(firstIterator.next());
+ firstIterator.remove();
+ search_loop:
+ for (int idx = 0; idx < currRegion.size(); ++idx) {
+ final ThreadedRegionSection curr = currRegion.get(idx);
+ final int centerX = curr.sectionX;
+ final int centerZ = curr.sectionZ;
+
+ // find neighbours in radius
+ for (int dz = -mergeRadius; dz <= mergeRadius; ++dz) {
+ for (int dx = -mergeRadius; dx <= mergeRadius; ++dx) {
+ if ((dx | dz) == 0) {
+ continue;
+ }
+
+ final ThreadedRegionSection section = recalculateSections.remove(CoordinateUtils.getChunkKey(dx + centerX, dz + centerZ));
+ if (section == null) {
+ continue;
+ }
+
+ currRegion.add(section);
+
+ if (recalculateSections.isEmpty()) {
+ // no point in searching further
+ break search_loop;
+ }
+ }
+ }
+ }
+
+ newRegions.add(currRegion);
+ }
+
+ // now we have split the regions into separate parts, we can split recalculate
+
+ if (newRegions.size() == 1) {
+ // no need to split anything, we're done here
+ region.state = ThreadedRegion.STATE_READY;
+ if (!region.expectingMergeFrom.isEmpty() || !region.mergeIntoLater.isEmpty()) {
+ throw new IllegalStateException("Illegal state " + region);
+ }
+ return;
+ }
+
+ // need to split the region, so we need to kill the old one first
+ region.state = ThreadedRegion.STATE_DEAD;
+ region.onRemove(true);
+
+ // create new regions
+ final Long2ReferenceOpenHashMap> newRegionsMap = new Long2ReferenceOpenHashMap<>();
+ final ReferenceOpenHashSet> newRegionsSet = new ReferenceOpenHashSet<>();
+
+ for (final List> sections : newRegions) {
+ final ThreadedRegion newRegion = new ThreadedRegion<>(this);
+ newRegionsSet.add(newRegion);
+
+ for (final ThreadedRegionSection section : sections) {
+ section.setRegionRelease(null);
+ newRegion.addSection(section);
+ final ThreadedRegion curr = newRegionsMap.putIfAbsent(section.sectionKey, newRegion);
+ if (curr != null) {
+ throw new IllegalStateException("Expected no region at " + section + ", but got " + curr + ", should have put " + newRegion);
+ }
+ }
+ }
+
+ region.split(newRegionsMap, newRegionsSet);
+
+ // only after invoking data callbacks
+
+ for (final ThreadedRegion newRegion : newRegionsSet) {
+ newRegion.state = ThreadedRegion.STATE_READY;
+ if (!newRegion.expectingMergeFrom.isEmpty() || !newRegion.mergeIntoLater.isEmpty()) {
+ throw new IllegalStateException("Illegal state " + newRegion);
+ }
+ newRegion.onCreate();
+ this.callbacks.onRegionActive(newRegion);
+ }
+ }
+
+ public static final class ThreadedRegion, S extends ThreadedRegionSectionData> {
+
+ private static final AtomicLong REGION_ID_GENERATOR = new AtomicLong();
+
+ private static final int STATE_TRANSIENT = 0;
+ private static final int STATE_READY = 1;
+ private static final int STATE_TICKING = 2;
+ private static final int STATE_DEAD = 3;
+
+ public final long id;
+
+ private int state;
+
+ private final Long2ReferenceOpenHashMap> sectionByKey = new Long2ReferenceOpenHashMap<>();
+ private final ReferenceOpenHashSet> deadSections = new ReferenceOpenHashSet<>();
+
+ public final ThreadedRegionizer regioniser;
+
+ private final R data;
+
+ private final ReferenceOpenHashSet> mergeIntoLater = new ReferenceOpenHashSet<>();
+ private final ReferenceOpenHashSet> expectingMergeFrom = new ReferenceOpenHashSet<>();
+
+ public ThreadedRegion(final ThreadedRegionizer regioniser) {
+ this.regioniser = regioniser;
+ this.id = REGION_ID_GENERATOR.getAndIncrement();
+ this.state = STATE_TRANSIENT;
+ this.data = regioniser.callbacks.createNewData(this);
+ }
+
+ public LongArrayList getOwnedSections() {
+ final boolean lock = this.regioniser.writeLockOwner != Thread.currentThread();
+ if (lock) {
+ this.regioniser.regionLock.readLock();
+ }
+ try {
+ final LongArrayList ret = new LongArrayList(this.sectionByKey.size());
+ ret.addAll(this.sectionByKey.keySet());
+
+ return ret;
+ } finally {
+ if (lock) {
+ this.regioniser.regionLock.tryUnlockRead();
+ }
+ }
+ }
+
+ /**
+ * returns an iterator directly over the sections map. This is only to be used by a thread which is _ticking_
+ * 'this' region.
+ */
+ public LongIterator getOwnedSectionsUnsynchronised() {
+ return this.sectionByKey.keySet().iterator();
+ }
+
+ public LongArrayList getOwnedChunks() {
+ final boolean lock = this.regioniser.writeLockOwner != Thread.currentThread();
+ if (lock) {
+ this.regioniser.regionLock.readLock();
+ }
+ try {
+ final LongArrayList ret = new LongArrayList();
+ for (final ThreadedRegionSection section : this.sectionByKey.values()) {
+ ret.addAll(section.getChunks());
+ }
+
+ return ret;
+ } finally {
+ if (lock) {
+ this.regioniser.regionLock.tryUnlockRead();
+ }
+ }
+ }
+
+ public Long getCenterSection() {
+ final LongArrayList sections = this.getOwnedSections();
+
+ final LongComparator comparator = (final long k1, final long k2) -> {
+ final int x1 = CoordinateUtils.getChunkX(k1);
+ final int x2 = CoordinateUtils.getChunkX(k2);
+
+ final int z1 = CoordinateUtils.getChunkZ(x1);
+ final int z2 = CoordinateUtils.getChunkZ(x2);
+
+ final int zCompare = Integer.compare(z1, z2);
+ if (zCompare != 0) {
+ return zCompare;
+ }
+
+ return Integer.compare(x1, x2);
+ };
+
+ // note: regions don't always have a chunk section at this point, because the region may have been killed
+ if (sections.isEmpty()) {
+ return null;
+ }
+
+ sections.sort(comparator);
+
+ return Long.valueOf(sections.getLong(sections.size() >> 1));
+ }
+
+ public ChunkPos getCenterChunk() {
+ final LongArrayList chunks = this.getOwnedChunks();
+
+ final LongComparator comparator = (final long k1, final long k2) -> {
+ final int x1 = CoordinateUtils.getChunkX(k1);
+ final int x2 = CoordinateUtils.getChunkX(k2);
+
+ final int z1 = CoordinateUtils.getChunkZ(k1);
+ final int z2 = CoordinateUtils.getChunkZ(k2);
+
+ final int zCompare = Integer.compare(z1, z2);
+ if (zCompare != 0) {
+ return zCompare;
+ }
+
+ return Integer.compare(x1, x2);
+ };
+ chunks.sort(comparator);
+
+ // note: regions don't always have a chunk at this point, because the region may have been killed
+ if (chunks.isEmpty()) {
+ return null;
+ }
+
+ final long middle = chunks.getLong(chunks.size() >> 1);
+
+ return new ChunkPos(CoordinateUtils.getChunkX(middle), CoordinateUtils.getChunkZ(middle));
+ }
+
+ private void onCreate() {
+ this.regioniser.onRegionCreate(this);
+ this.regioniser.callbacks.onRegionCreate(this);
+ }
+
+ private void onRemove(final boolean wasActive) {
+ if (wasActive) {
+ this.regioniser.callbacks.onRegionInactive(this);
+ }
+ this.regioniser.callbacks.onRegionDestroy(this);
+ this.regioniser.onRegionDestroy(this);
+ }
+
+ private final boolean hasNoAliveSections() {
+ return this.deadSections.size() == this.sectionByKey.size();
+ }
+
+ private final double getDeadSectionPercent() {
+ return (double)this.deadSections.size() / (double)this.sectionByKey.size();
+ }
+
+ private void split(final Long2ReferenceOpenHashMap> into, final ReferenceOpenHashSet> regions) {
+ if (this.data != null) {
+ this.data.split(this.regioniser, into, regions);
+ }
+ }
+
+ private void mergeInto(final ThreadedRegion mergeTarget) {
+ if (this == mergeTarget) {
+ throw new IllegalStateException("Cannot merge a region onto itself");
+ }
+ if (!this.isDead()) {
+ throw new IllegalStateException("Source region is not dead! Source " + this + ", target " + mergeTarget);
+ } else if (mergeTarget.isDead()) {
+ throw new IllegalStateException("Target region is dead! Source " + this + ", target " + mergeTarget);
+ }
+
+ for (final ThreadedRegionSection section : this.sectionByKey.values()) {
+ section.setRegionRelease(null);
+ mergeTarget.addSection(section);
+ }
+ for (final ThreadedRegionSection deadSection : this.deadSections) {
+ if (this.sectionByKey.get(deadSection.sectionKey) != deadSection) {
+ throw new IllegalStateException("Source region does not even contain its own dead sections! Missing " + deadSection + " from region " + this);
+ }
+ if (!mergeTarget.deadSections.add(deadSection)) {
+ throw new IllegalStateException("Merge target contains dead section from source! Has " + deadSection + " from region " + this);
+ }
+ }
+
+ // forward merge expectations
+ for (final ThreadedRegion region : this.expectingMergeFrom) {
+ if (!region.mergeIntoLater.remove(this)) {
+ throw new IllegalStateException("Region " + region + " was not supposed to merge into " + this + "?");
+ }
+ if (region != mergeTarget) {
+ region.mergeIntoLater(mergeTarget);
+ }
+ }
+
+ // forward merge into
+ for (final ThreadedRegion region : this.mergeIntoLater) {
+ if (!region.expectingMergeFrom.remove(this)) {
+ throw new IllegalStateException("Region " + this + " was not supposed to merge into " + region + "?");
+ }
+ if (region != mergeTarget) {
+ mergeTarget.mergeIntoLater(region);
+ }
+ }
+
+ // finally, merge data
+ if (this.data != null) {
+ this.data.mergeInto(mergeTarget);
+ }
+ }
+
+ private void mergeIntoLater(final ThreadedRegion region) {
+ if (region.isDead()) {
+ throw new IllegalStateException("Trying to merge later into a dead region: " + region);
+ }
+ final boolean add1, add2;
+ if ((add1 = this.mergeIntoLater.add(region)) != (add2 = region.expectingMergeFrom.add(this))) {
+ throw new IllegalStateException("Inconsistent state between target merge " + region + " and this " + this + ": add1,add2:" + add1 + "," + add2);
+ }
+ }
+
+ private boolean tryKill() {
+ switch (this.state) {
+ case STATE_TRANSIENT: {
+ this.state = STATE_DEAD;
+ this.onRemove(false);
+ return true;
+ }
+ case STATE_READY: {
+ this.state = STATE_DEAD;
+ this.onRemove(true);
+ return true;
+ }
+ case STATE_TICKING: {
+ return false;
+ }
+ case STATE_DEAD: {
+ throw new IllegalStateException("Already dead");
+ }
+ default: {
+ throw new IllegalStateException("Unknown state: " + this.state);
+ }
+ }
+ }
+
+ private boolean isDead() {
+ return this.state == STATE_DEAD;
+ }
+
+ private boolean isTicking() {
+ return this.state == STATE_TICKING;
+ }
+
+ private void removeDeadSection(final ThreadedRegionSection section) {
+ this.deadSections.remove(section);
+ }
+
+ private void addDeadSection(final ThreadedRegionSection section) {
+ this.deadSections.add(section);
+ }
+
+ private void addSection(final ThreadedRegionSection section) {
+ if (section.getRegionPlain() != null) {
+ throw new IllegalStateException("Section already has region");
+ }
+ if (this.sectionByKey.putIfAbsent(section.sectionKey, section) != null) {
+ throw new IllegalStateException("Already have section " + section + ", mapped to " + this.sectionByKey.get(section.sectionKey));
+ }
+ section.setRegionRelease(this);
+ }
+
+ public R getData() {
+ return this.data;
+ }
+
+ public boolean tryMarkTicking(final BooleanSupplier abort) {
+ this.regioniser.acquireWriteLock();
+ try {
+ if (this.state != STATE_READY || abort.getAsBoolean()) {
+ return false;
+ }
+
+ if (!this.mergeIntoLater.isEmpty() || !this.expectingMergeFrom.isEmpty()) {
+ throw new IllegalStateException("Region " + this + " should not be ready");
+ }
+
+ this.state = STATE_TICKING;
+ return true;
+ } finally {
+ this.regioniser.releaseWriteLock();
+ }
+ }
+
+ public boolean markNotTicking() {
+ this.regioniser.acquireWriteLock();
+ try {
+ if (this.state != STATE_TICKING) {
+ throw new IllegalStateException("Attempting to release non-locked state");
+ }
+
+ this.regioniser.onRegionRelease(this);
+
+ return this.state == STATE_READY;
+ } catch (final Throwable throwable) {
+ LOGGER.error("Failed to acquire region " + this, throwable);
+ SneakyThrow.sneaky(throwable);
+ return false; // unreachable
+ } finally {
+ this.regioniser.releaseWriteLock();
+ }
+ }
+
+ @Override
+ public String toString() {
+ final StringBuilder ret = new StringBuilder(128);
+
+ ret.append("ThreadedRegion{");
+ ret.append("state=").append(this.state).append(',');
+ // To avoid recursion in toString, maybe fix later?
+ //ret.append("mergeIntoLater=").append(this.mergeIntoLater).append(',');
+ //ret.append("expectingMergeFrom=").append(this.expectingMergeFrom).append(',');
+
+ ret.append("sectionCount=").append(this.sectionByKey.size()).append(',');
+ ret.append("sections=[");
+ for (final Iterator> iterator = this.sectionByKey.values().iterator(); iterator.hasNext();) {
+ final ThreadedRegionSection section = iterator.next();
+
+ ret.append(section.toString());
+ if (iterator.hasNext()) {
+ ret.append(',');
+ }
+ }
+ ret.append(']');
+
+ ret.append('}');
+ return ret.toString();
+ }
+ }
+
+ public static final class ThreadedRegionSection, S extends ThreadedRegionSectionData> {
+
+ public final int sectionX;
+ public final int sectionZ;
+ public final long sectionKey;
+ private final long[] chunksBitset;
+ private int chunkCount;
+ private int nonEmptyNeighbours;
+
+ private ThreadedRegion region;
+ private static final VarHandle REGION_HANDLE = ConcurrentUtil.getVarHandle(ThreadedRegionSection.class, "region", ThreadedRegion.class);
+
+ public final ThreadedRegionizer regioniser;
+
+ private final int regionChunkShift;
+ private final int regionChunkMask;
+
+ private final S data;
+
+ private ThreadedRegion getRegionPlain() {
+ return (ThreadedRegion)REGION_HANDLE.get(this);
+ }
+
+ private ThreadedRegion getRegionAcquire() {
+ return (ThreadedRegion)REGION_HANDLE.getAcquire(this);
+ }
+
+ private void setRegionRelease(final ThreadedRegion value) {
+ REGION_HANDLE.setRelease(this, value);
+ }
+
+ // creates an empty section with zero non-empty neighbours
+ private ThreadedRegionSection(final int sectionX, final int sectionZ, final ThreadedRegionizer regioniser) {
+ this.sectionX = sectionX;
+ this.sectionZ = sectionZ;
+ this.sectionKey = CoordinateUtils.getChunkKey(sectionX, sectionZ);
+ this.chunksBitset = new long[Math.max(1, regioniser.regionSectionChunkSize * regioniser.regionSectionChunkSize / Long.SIZE)];
+ this.regioniser = regioniser;
+ this.regionChunkShift = regioniser.sectionChunkShift;
+ this.regionChunkMask = regioniser.regionSectionChunkSize - 1;
+ this.data = regioniser.callbacks
+ .createNewSectionData(sectionX, sectionZ, this.regionChunkShift);
+ }
+
+ // creates a section with an initial chunk with zero non-empty neighbours
+ private ThreadedRegionSection(final int sectionX, final int sectionZ, final ThreadedRegionizer regioniser,
+ final int chunkXInit, final int chunkZInit) {
+ this(sectionX, sectionZ, regioniser);
+
+ final int initIndex = this.getChunkIndex(chunkXInit, chunkZInit);
+ this.chunkCount = 1;
+ this.chunksBitset[initIndex >>> 6] = 1L << (initIndex & (Long.SIZE - 1)); // index / Long.SIZE
+ }
+
+ // creates an empty section with the specified number of non-empty neighbours
+ private ThreadedRegionSection(final int sectionX, final int sectionZ, final ThreadedRegionizer regioniser,
+ final int nonEmptyNeighbours) {
+ this(sectionX, sectionZ, regioniser);
+
+ this.nonEmptyNeighbours = nonEmptyNeighbours;
+ }
+
+ public LongArrayList getChunks() {
+ final LongArrayList ret = new LongArrayList();
+
+ if (this.chunkCount == 0) {
+ return ret;
+ }
+
+ final int shift = this.regionChunkShift;
+ final int mask = this.regionChunkMask;
+ final int offsetX = this.sectionX << shift;
+ final int offsetZ = this.sectionZ << shift;
+
+ final long[] bitset = this.chunksBitset;
+ for (int arrIdx = 0, arrLen = bitset.length; arrIdx < arrLen; ++arrIdx) {
+ long value = bitset[arrIdx];
+
+ for (int i = 0, bits = Long.bitCount(value); i < bits; ++i) {
+ final int valueIdx = Long.numberOfTrailingZeros(value);
+ value ^= io.papermc.paper.util.IntegerUtil.getTrailingBit(value);
+
+ final int idx = valueIdx | (arrIdx << 6);
+
+ final int localX = idx & mask;
+ final int localZ = (idx >>> shift) & mask;
+
+ ret.add(CoordinateUtils.getChunkKey(localX | offsetX, localZ | offsetZ));
+ }
+ }
+
+ return ret;
+ }
+
+ private boolean isEmpty() {
+ return this.chunkCount == 0;
+ }
+
+ private boolean hasOnlyOneChunk() {
+ return this.chunkCount == 1;
+ }
+
+ public boolean hasNonEmptyNeighbours() {
+ return this.nonEmptyNeighbours != 0;
+ }
+
+ /**
+ * Returns the section data associated with this region section. May be {@code null}.
+ */
+ public S getData() {
+ return this.data;
+ }
+
+ /**
+ * Returns the region that owns this section. Unsynchronised access may produce outdateed or transient results.
+ */
+ public ThreadedRegion getRegion() {
+ return this.getRegionAcquire();
+ }
+
+ private int getChunkIndex(final int chunkX, final int chunkZ) {
+ return (chunkX & this.regionChunkMask) | ((chunkZ & this.regionChunkMask) << this.regionChunkShift);
+ }
+
+ private void markAlive() {
+ this.getRegionPlain().removeDeadSection(this);
+ }
+
+ private void markDead() {
+ this.getRegionPlain().addDeadSection(this);
+ }
+
+ private void incrementNonEmptyNeighbours() {
+ if (++this.nonEmptyNeighbours == 1 && this.chunkCount == 0) {
+ this.markAlive();
+ }
+ final int createRadius = this.regioniser.emptySectionCreateRadius;
+ if (this.nonEmptyNeighbours >= ((createRadius * 2 + 1) * (createRadius * 2 + 1))) {
+ throw new IllegalStateException("Non empty neighbours exceeded max value for radius " + createRadius);
+ }
+ }
+
+ private void decrementNonEmptyNeighbours() {
+ if (--this.nonEmptyNeighbours == 0 && this.chunkCount == 0) {
+ this.markDead();
+ }
+ if (this.nonEmptyNeighbours < 0) {
+ throw new IllegalStateException("Non empty neighbours reached zero");
+ }
+ }
+
+ /**
+ * Returns whether the chunk was zero. Effectively returns whether the caller needs to create
+ * dead sections / increase non-empty neighbour count for neighbouring sections.
+ */
+ private boolean addChunk(final int chunkX, final int chunkZ) {
+ final int index = this.getChunkIndex(chunkX, chunkZ);
+ final long bitset = this.chunksBitset[index >>> 6]; // index / Long.SIZE
+ final long after = this.chunksBitset[index >>> 6] = bitset | (1L << (index & (Long.SIZE - 1)));
+ if (after == bitset) {
+ throw new IllegalStateException("Cannot add a chunk to a section which already has the chunk! RegionSection: " + this + ", global chunk: " + new ChunkPos(chunkX, chunkZ).toString());
+ }
+ final boolean notEmpty = ++this.chunkCount == 1;
+ if (notEmpty && this.nonEmptyNeighbours == 0) {
+ this.markAlive();
+ }
+ return notEmpty;
+ }
+
+ /**
+ * Returns whether the chunk count is now zero. Effectively returns whether
+ * the caller needs to decrement the neighbour count for neighbouring sections.
+ */
+ private boolean removeChunk(final int chunkX, final int chunkZ) {
+ final int index = this.getChunkIndex(chunkX, chunkZ);
+ final long before = this.chunksBitset[index >>> 6]; // index / Long.SIZE
+ final long bitset = this.chunksBitset[index >>> 6] = before & ~(1L << (index & (Long.SIZE - 1)));
+ if (before == bitset) {
+ throw new IllegalStateException("Cannot remove a chunk from a section which does not have that chunk! RegionSection: " + this + ", global chunk: " + new ChunkPos(chunkX, chunkZ).toString());
+ }
+ final boolean empty = --this.chunkCount == 0;
+ if (empty && this.nonEmptyNeighbours == 0) {
+ this.markDead();
+ }
+ return empty;
+ }
+
+ @Override
+ public String toString() {
+ return "RegionSection{" +
+ "sectionCoordinate=" + new ChunkPos(this.sectionX, this.sectionZ).toString() + "," +
+ "chunkCount=" + this.chunkCount + "," +
+ "chunksBitset=" + toString(this.chunksBitset) + "," +
+ "nonEmptyNeighbours=" + this.nonEmptyNeighbours + "," +
+ "hash=" + this.hashCode() +
+ "}";
+ }
+
+ public String toStringWithRegion() {
+ return "RegionSection{" +
+ "sectionCoordinate=" + new ChunkPos(this.sectionX, this.sectionZ).toString() + "," +
+ "chunkCount=" + this.chunkCount + "," +
+ "chunksBitset=" + toString(this.chunksBitset) + "," +
+ "hash=" + this.hashCode() + "," +
+ "nonEmptyNeighbours=" + this.nonEmptyNeighbours + "," +
+ "region=" + this.getRegionAcquire() +
+ "}";
+ }
+
+ private static String toString(final long[] array) {
+ final StringBuilder ret = new StringBuilder();
+ final char[] zeros = new char[Long.SIZE / 4];
+ for (final long value : array) {
+ // zero pad the hex string
+ Arrays.fill(zeros, '0');
+ final String string = Long.toHexString(value);
+ System.arraycopy(string.toCharArray(), 0, zeros, zeros.length - string.length(), string.length());
+
+ ret.append(zeros);
+ }
+
+ return ret.toString();
+ }
+ }
+
+ public static interface ThreadedRegionData, S extends ThreadedRegionSectionData> {
+
+ /**
+ * Splits this region data into the specified regions set.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param regioniser Regioniser for which the regions reside in.
+ * @param into A map of region section coordinate key to the region that owns the section.
+ * @param regions The set of regions to split into.
+ */
+ public void split(final ThreadedRegionizer regioniser, final Long2ReferenceOpenHashMap> into,
+ final ReferenceOpenHashSet> regions);
+
+ /**
+ * Callback to merge {@code this} region data into the specified region. The state of the region is undefined
+ * except that its region data is already created.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param into Specified region.
+ */
+ public void mergeInto(final ThreadedRegion into);
+ }
+
+ public static interface ThreadedRegionSectionData {}
+
+ public static interface RegionCallbacks, S extends ThreadedRegionSectionData> {
+
+ /**
+ * Creates new section data for the specified section x and section z.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param sectionX x coordinate of the section.
+ * @param sectionZ z coordinate of the section.
+ * @param sectionShift The signed right shift value that can be applied to any chunk coordinate that
+ * produces a section coordinate.
+ * @return New section data, may be {@code null}.
+ */
+ public S createNewSectionData(final int sectionX, final int sectionZ, final int sectionShift);
+
+ /**
+ * Creates new region data for the specified region.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param forRegion The region to create the data for.
+ * @return New region data, may be {@code null}.
+ */
+ public R createNewData(final ThreadedRegion forRegion);
+
+ /**
+ * Callback for when a region is created. This is invoked after the region is completely set up,
+ * so its data and owned sections are reliable to inspect.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param region The region that was created.
+ */
+ public void onRegionCreate(final ThreadedRegion region);
+
+ /**
+ * Callback for when a region is destroyed. This is invoked before the region is actually destroyed; so
+ * its data and owned sections are reliable to inspect.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param region The region that is about to be destroyed.
+ */
+ public void onRegionDestroy(final ThreadedRegion region);
+
+ /**
+ * Callback for when a region is considered "active." An active region x is a non-destroyed region which
+ * is not scheduled to merge into another region y and there are no non-destroyed regions z which are
+ * scheduled to merge into the region x. Equivalently, an active region is not directly adjacent to any
+ * other region considering the regioniser's empty section radius.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param region The region that is now active.
+ */
+ public void onRegionActive(final ThreadedRegion region);
+
+ /**
+ * Callback for when a region transistions becomes inactive. An inactive region is non-destroyed, but
+ * has neighbouring adjacent regions considering the regioniser's empty section radius. Effectively,
+ * an inactive region may not tick and needs to be merged into its neighbouring regions.
+ *
+ * Note:
+ *
+ *
+ * This function is always called while holding critical locks and as such should not attempt to block on anything, and
+ * should NOT retrieve or modify ANY world state.
+ *
+ * @param region The region that is now inactive.
+ */
+ public void onRegionInactive(final ThreadedRegion region);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/TickData.java b/src/main/java/io/papermc/paper/threadedregions/TickData.java
new file mode 100644
index 0000000000000000000000000000000000000000..29f9fed5f02530b3256e6b993e607d4647daa7b6
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/TickData.java
@@ -0,0 +1,333 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.util.TimeUtil;
+import io.papermc.paper.util.IntervalledCounter;
+import it.unimi.dsi.fastutil.longs.LongArrayList;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public final class TickData {
+
+ private final long interval; // ns
+
+ private final ArrayDeque timeData = new ArrayDeque<>();
+
+ public TickData(final long intervalNS) {
+ this.interval = intervalNS;
+ }
+
+ public void addDataFrom(final TickRegionScheduler.TickTime time) {
+ final long start = time.tickStart();
+
+ TickRegionScheduler.TickTime first;
+ while ((first = this.timeData.peekFirst()) != null) {
+ // only remove data completely out of window
+ if ((start - first.tickEnd()) <= this.interval) {
+ break;
+ }
+ this.timeData.pollFirst();
+ }
+
+ this.timeData.add(time);
+ }
+
+ // fromIndex inclusive, toIndex exclusive
+ // will throw if arr.length == 0
+ private static double median(final long[] arr, final int fromIndex, final int toIndex) {
+ final int len = toIndex - fromIndex;
+ final int middle = fromIndex + (len >>> 1);
+ if ((len & 1) == 0) {
+ // even, average the two middle points
+ return (double)(arr[middle - 1] + arr[middle]) / 2.0;
+ } else {
+ // odd, just grab the middle
+ return (double)arr[middle];
+ }
+ }
+
+ // will throw if arr.length == 0
+ private static SegmentData computeSegmentData(final long[] arr, final int fromIndex, final int toIndex,
+ final boolean inverse) {
+ final int len = toIndex - fromIndex;
+ long sum = 0L;
+ final double median = median(arr, fromIndex, toIndex);
+ long min = arr[0];
+ long max = arr[0];
+
+ for (int i = fromIndex; i < toIndex; ++i) {
+ final long val = arr[i];
+ sum += val;
+ if (val < min) {
+ min = val;
+ }
+ if (val > max) {
+ max = val;
+ }
+ }
+
+ if (inverse) {
+ // for positive a,b we have that a >= b if and only if 1/a <= 1/b
+ return new SegmentData(
+ len,
+ (double)len / ((double)sum / 1.0E9),
+ 1.0E9 / median,
+ 1.0E9 / (double)max,
+ 1.0E9 / (double)min
+ );
+ } else {
+ return new SegmentData(
+ len,
+ (double)sum / (double)len,
+ median,
+ (double)min,
+ (double)max
+ );
+ }
+ }
+
+ private static SegmentedAverage computeSegmentedAverage(final long[] data, final int allStart, final int allEnd,
+ final int percent99BestStart, final int percent99BestEnd,
+ final int percent95BestStart, final int percent95BestEnd,
+ final int percent1WorstStart, final int percent1WorstEnd,
+ final int percent5WorstStart, final int percent5WorstEnd,
+ final boolean inverse) {
+ return new SegmentedAverage(
+ computeSegmentData(data, allStart, allEnd, inverse),
+ computeSegmentData(data, percent99BestStart, percent99BestEnd, inverse),
+ computeSegmentData(data, percent95BestStart, percent95BestEnd, inverse),
+ computeSegmentData(data, percent1WorstStart, percent1WorstEnd, inverse),
+ computeSegmentData(data, percent5WorstStart, percent5WorstEnd, inverse)
+ );
+ }
+
+ private static record TickInformation(
+ long differenceFromLastTick,
+ long tickTime,
+ long tickTimeCPU
+ ) {}
+
+ // rets null if there is no data
+ public TickReportData generateTickReport(final TickRegionScheduler.TickTime inProgress, final long endTime) {
+ if (this.timeData.isEmpty() && inProgress == null) {
+ return null;
+ }
+
+ final List allData = new ArrayList<>(this.timeData);
+ if (inProgress != null) {
+ allData.add(inProgress);
+ }
+
+ final long intervalStart = allData.get(0).tickStart();
+ final long intervalEnd = allData.get(allData.size() - 1).tickEnd();
+
+ // to make utilisation accurate, we need to take the total time used over the last interval period -
+ // this means if a tick start before the measurement interval, but ends within the interval, then we
+ // only consider the time it spent ticking inside the interval
+ long totalTimeOverInterval = 0L;
+ long measureStart = endTime - this.interval;
+
+ for (int i = 0, len = allData.size(); i < len; ++i) {
+ final TickRegionScheduler.TickTime time = allData.get(i);
+ if (TimeUtil.compareTimes(time.tickStart(), measureStart) < 0) {
+ final long diff = time.tickEnd() - measureStart;
+ if (diff > 0L) {
+ totalTimeOverInterval += diff;
+ } // else: the time is entirely out of interval
+ } else {
+ totalTimeOverInterval += time.tickLength();
+ }
+ }
+
+ // we only care about ticks, but because of inbetween tick task execution
+ // there will be data in allData that isn't ticks. But, that data cannot
+ // be ignored since it contributes to utilisation.
+ // So, we will "compact" the data by merging any inbetween tick times
+ // the next tick.
+ // If there is no "next tick", then we will create one.
+ final List collapsedData = new ArrayList<>();
+ for (int i = 0, len = allData.size(); i < len; ++i) {
+ final List toCollapse = new ArrayList<>();
+ TickRegionScheduler.TickTime lastTick = null;
+ for (;i < len; ++i) {
+ final TickRegionScheduler.TickTime time = allData.get(i);
+ if (!time.isTickExecution()) {
+ toCollapse.add(time);
+ continue;
+ }
+ lastTick = time;
+ break;
+ }
+
+ if (toCollapse.isEmpty()) {
+ // nothing to collapse
+ final TickRegionScheduler.TickTime last = allData.get(i);
+ collapsedData.add(
+ new TickInformation(
+ last.differenceFromLastTick(),
+ last.tickLength(),
+ last.supportCPUTime() ? last.tickCpuTime() : 0L
+ )
+ );
+ } else {
+ long totalTickTime = 0L;
+ long totalCpuTime = 0L;
+ for (int k = 0, len2 = collapsedData.size(); k < len2; ++k) {
+ final TickRegionScheduler.TickTime time = toCollapse.get(k);
+ totalTickTime += time.tickLength();
+ totalCpuTime += time.supportCPUTime() ? time.tickCpuTime() : 0L;
+ }
+ if (i < len) {
+ // we know there is a tick to collapse into
+ final TickRegionScheduler.TickTime last = allData.get(i);
+ collapsedData.add(
+ new TickInformation(
+ last.differenceFromLastTick(),
+ last.tickLength() + totalTickTime,
+ (last.supportCPUTime() ? last.tickCpuTime() : 0L) + totalCpuTime
+ )
+ );
+ } else {
+ // we do not have a tick to collapse into, so we must make one up
+ // we will assume that the tick is "starting now" and ongoing
+
+ // compute difference between imaginary tick and last tick
+ final long differenceBetweenTicks;
+ if (lastTick != null) {
+ // we have a last tick, use it
+ differenceBetweenTicks = lastTick.tickStart();
+ } else {
+ // we don't have a last tick, so we must make one up that makes sense
+ // if the current interval exceeds the max tick time, then use it
+
+ // Otherwise use the interval length.
+ // This is how differenceFromLastTick() works on TickTime when there is no previous interval.
+ differenceBetweenTicks = Math.max(
+ TickRegionScheduler.TIME_BETWEEN_TICKS, totalTickTime
+ );
+ }
+
+ collapsedData.add(
+ new TickInformation(
+ differenceBetweenTicks,
+ totalTickTime,
+ totalCpuTime
+ )
+ );
+ }
+ }
+ }
+
+
+ final int collectedTicks = collapsedData.size();
+ final long[] tickStartToStartDifferences = new long[collectedTicks];
+ final long[] timePerTickDataRaw = new long[collectedTicks];
+ final long[] missingCPUTimeDataRaw = new long[collectedTicks];
+
+ long totalTimeTicking = 0L;
+
+ int i = 0;
+ for (final TickInformation time : collapsedData) {
+ tickStartToStartDifferences[i] = time.differenceFromLastTick();
+ final long timePerTick = timePerTickDataRaw[i] = time.tickTime();
+ missingCPUTimeDataRaw[i] = Math.max(0L, timePerTick - time.tickTimeCPU());
+
+ ++i;
+
+ totalTimeTicking += timePerTick;
+ }
+
+ Arrays.sort(tickStartToStartDifferences);
+ Arrays.sort(timePerTickDataRaw);
+ Arrays.sort(missingCPUTimeDataRaw);
+
+ // Note: computeSegmentData cannot take start == end
+ final int allStart = 0;
+ final int allEnd = collectedTicks;
+ final int percent95BestStart = 0;
+ final int percent95BestEnd = collectedTicks == 1 ? 1 : (int)(0.95 * collectedTicks);
+ final int percent99BestStart = 0;
+ // (int)(0.99 * collectedTicks) == 0 if collectedTicks = 1, so we need to use 1 to avoid start == end
+ final int percent99BestEnd = collectedTicks == 1 ? 1 : (int)(0.99 * collectedTicks);
+ final int percent1WorstStart = (int)(0.99 * collectedTicks);
+ final int percent1WorstEnd = collectedTicks;
+ final int percent5WorstStart = (int)(0.95 * collectedTicks);
+ final int percent5WorstEnd = collectedTicks;
+
+ final SegmentedAverage tpsData = computeSegmentedAverage(
+ tickStartToStartDifferences,
+ allStart, allEnd,
+ percent99BestStart, percent99BestEnd,
+ percent95BestStart, percent95BestEnd,
+ percent1WorstStart, percent1WorstEnd,
+ percent5WorstStart, percent5WorstEnd,
+ true
+ );
+
+ final SegmentedAverage timePerTickData = computeSegmentedAverage(
+ timePerTickDataRaw,
+ allStart, allEnd,
+ percent99BestStart, percent99BestEnd,
+ percent95BestStart, percent95BestEnd,
+ percent1WorstStart, percent1WorstEnd,
+ percent5WorstStart, percent5WorstEnd,
+ false
+ );
+
+ final SegmentedAverage missingCPUTimeData = computeSegmentedAverage(
+ missingCPUTimeDataRaw,
+ allStart, allEnd,
+ percent99BestStart, percent99BestEnd,
+ percent95BestStart, percent95BestEnd,
+ percent1WorstStart, percent1WorstEnd,
+ percent5WorstStart, percent5WorstEnd,
+ false
+ );
+
+ final double utilisation = (double)totalTimeOverInterval / (double)this.interval;
+
+ return new TickReportData(
+ collectedTicks,
+ intervalStart,
+ intervalEnd,
+ totalTimeTicking,
+ utilisation,
+
+ tpsData,
+ timePerTickData,
+ missingCPUTimeData
+ );
+ }
+
+ public static final record TickReportData(
+ int collectedTicks,
+ long collectedTickIntervalStart,
+ long collectedTickIntervalEnd,
+ long totalTimeTicking,
+ double utilisation,
+
+ SegmentedAverage tpsData,
+ // in ns
+ SegmentedAverage timePerTickData,
+ // in ns
+ SegmentedAverage missingCPUTimeData
+ ) {}
+
+ public static final record SegmentedAverage(
+ SegmentData segmentAll,
+ SegmentData segment99PercentBest,
+ SegmentData segment95PercentBest,
+ SegmentData segment5PercentWorst,
+ SegmentData segment1PercentWorst
+ ) {}
+
+ public static final record SegmentData(
+ int count,
+ double average,
+ double median,
+ double least,
+ double greatest
+ ) {}
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/TickRegionScheduler.java b/src/main/java/io/papermc/paper/threadedregions/TickRegionScheduler.java
new file mode 100644
index 0000000000000000000000000000000000000000..ee9f5e1f3387998cddbeb1dc6dc6e2b1ea7cd670
--- /dev/null
+++ b/src/main/java/io/papermc/paper/threadedregions/TickRegionScheduler.java
@@ -0,0 +1,565 @@
+package io.papermc.paper.threadedregions;
+
+import ca.spottedleaf.concurrentutil.scheduler.SchedulerThreadPool;
+import ca.spottedleaf.concurrentutil.util.TimeUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.util.TickThread;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import org.slf4j.Logger;
+import java.lang.management.ManagementFactory;
+import java.lang.management.ThreadMXBean;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.BooleanSupplier;
+
+public final class TickRegionScheduler {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+ private static final ThreadMXBean THREAD_MX_BEAN = ManagementFactory.getThreadMXBean();
+ private static final boolean MEASURE_CPU_TIME;
+ static {
+ MEASURE_CPU_TIME = THREAD_MX_BEAN.isThreadCpuTimeSupported();
+ if (MEASURE_CPU_TIME) {
+ THREAD_MX_BEAN.setThreadCpuTimeEnabled(true);
+ } else {
+ LOGGER.warn("TickRegionScheduler CPU time measurement is not available");
+ }
+ }
+
+ public static final int TICK_RATE = 20;
+ public static final long TIME_BETWEEN_TICKS = 1_000_000_000L / TICK_RATE; // ns
+
+ private final SchedulerThreadPool scheduler;
+
+ public TickRegionScheduler(final int threads) {
+ this.scheduler = new SchedulerThreadPool(threads, new ThreadFactory() {
+ private final AtomicInteger idGenerator = new AtomicInteger();
+
+ @Override
+ public Thread newThread(final Runnable run) {
+ final Thread ret = new TickThreadRunner(run, "Region Scheduler Thread #" + this.idGenerator.getAndIncrement());
+ ret.setUncaughtExceptionHandler(TickRegionScheduler.this::uncaughtException);
+ return ret;
+ }
+ });
+ }
+
+ public int getTotalThreadCount() {
+ return this.scheduler.getThreads().length;
+ }
+
+ private static void setTickingRegion(final ThreadedRegionizer.ThreadedRegion region) {
+ final Thread currThread = Thread.currentThread();
+ if (!(currThread instanceof TickThreadRunner tickThreadRunner)) {
+ throw new IllegalStateException("Must be tick thread runner");
+ }
+ if (region != null && tickThreadRunner.currentTickingRegion != null) {
+ throw new IllegalStateException("Trying to double set ticking region!");
+ }
+ if (region == null && tickThreadRunner.currentTickingRegion == null) {
+ throw new IllegalStateException("Trying to double unset ticking region!");
+ }
+ tickThreadRunner.currentTickingRegion = region;
+ if (region != null) {
+ tickThreadRunner.currentTickingWorldRegionizedData = region.regioniser.world.worldRegionData.get();
+ } else {
+ tickThreadRunner.currentTickingWorldRegionizedData = null;
+ }
+ }
+
+ private static void setTickTask(final SchedulerThreadPool.SchedulableTick task) {
+ final Thread currThread = Thread.currentThread();
+ if (!(currThread instanceof TickThreadRunner tickThreadRunner)) {
+ throw new IllegalStateException("Must be tick thread runner");
+ }
+ if (task != null && tickThreadRunner.currentTickingTask != null) {
+ throw new IllegalStateException("Trying to double set ticking task!");
+ }
+ if (task == null && tickThreadRunner.currentTickingTask == null) {
+ throw new IllegalStateException("Trying to double unset ticking task!");
+ }
+ tickThreadRunner.currentTickingTask = task;
+ }
+
+ /**
+ * Returns the current ticking region, or {@code null} if there is no ticking region.
+ * If this thread is not a TickThread, then returns {@code null}.
+ */
+ public static ThreadedRegionizer.ThreadedRegion getCurrentRegion() {
+ final Thread currThread = Thread.currentThread();
+ if (!(currThread instanceof TickThreadRunner tickThreadRunner)) {
+ return RegionShutdownThread.getRegion();
+ }
+ return tickThreadRunner.currentTickingRegion;
+ }
+
+ /**
+ * Returns the current ticking region's world regionised data, or {@code null} if there is no ticking region.
+ * This is a faster alternative to calling the {@link RegionizedData#get()} method.
+ * If this thread is not a TickThread, then returns {@code null}.
+ */
+ public static RegionizedWorldData getCurrentRegionizedWorldData() {
+ final Thread currThread = Thread.currentThread();
+ if (!(currThread instanceof TickThreadRunner tickThreadRunner)) {
+ return RegionShutdownThread.getWorldData();
+ }
+ return tickThreadRunner.currentTickingWorldRegionizedData;
+ }
+
+ /**
+ * Returns the current ticking task, or {@code null} if there is no ticking region.
+ * If this thread is not a TickThread, then returns {@code null}.
+ */
+ public static SchedulerThreadPool.SchedulableTick getCurrentTickingTask() {
+ final Thread currThread = Thread.currentThread();
+ if (!(currThread instanceof TickThreadRunner tickThreadRunner)) {
+ return null;
+ }
+ return tickThreadRunner.currentTickingTask;
+ }
+
+ /**
+ * Schedules the given region
+ * @throws IllegalStateException If the region is already scheduled or is ticking
+ */
+ public void scheduleRegion(final RegionScheduleHandle region) {
+ region.scheduler = this;
+ this.scheduler.schedule(region);
+ }
+
+ /**
+ * Attempts to de-schedule the provided region. If the current region cannot be cancelled for its next tick or task
+ * execution, then it will be cancelled after.
+ */
+ public void descheduleRegion(final RegionScheduleHandle region) {
+ // To avoid acquiring any of the locks the scheduler may be using, we
+ // simply cancel the next action.
+ region.markNonSchedulable();
+ }
+
+ /**
+ * Updates the tick start to the farthest into the future of its current scheduled time and the
+ * provided time.
+ * @return {@code false} if the region was not scheduled or is currently ticking or the specified time is less-than its
+ * current start time, {@code true} if the next tick start was adjusted.
+ */
+ public boolean updateTickStartToMax(final RegionScheduleHandle region, final long newStart) {
+ return this.scheduler.updateTickStartToMax(region, newStart);
+ }
+
+ public boolean halt(final boolean sync, final long maxWaitNS) {
+ return this.scheduler.halt(sync, maxWaitNS);
+ }
+
+ void dumpAliveThreadTraces(final String reason) {
+ this.scheduler.dumpAliveThreadTraces(reason);
+ }
+
+ public void setHasTasks(final RegionScheduleHandle region) {
+ this.scheduler.notifyTasks(region);
+ }
+
+ public void init() {
+ this.scheduler.start();
+ }
+
+ private void uncaughtException(final Thread thread, final Throwable thr) {
+ LOGGER.error("Uncaught exception in tick thread \"" + thread.getName() + "\"", thr);
+
+ // prevent further ticks from occurring
+ // we CANNOT sync, because WE ARE ON A SCHEDULER THREAD
+ this.scheduler.halt(false, 0L);
+
+ MinecraftServer.getServer().stopServer();
+ }
+
+ private void regionFailed(final RegionScheduleHandle handle, final boolean executingTasks, final Throwable thr) {
+ // when a region fails, we need to shut down the server gracefully
+
+ // prevent further ticks from occurring
+ // we CANNOT sync, because WE ARE ON A SCHEDULER THREAD
+ this.scheduler.halt(false, 0L);
+
+ final ChunkPos center = handle.region == null ? null : handle.region.region.getCenterChunk();
+ final ServerLevel world = handle.region == null ? null : handle.region.world;
+
+ LOGGER.error("Region #" + (handle.region == null ? -1L : handle.region.id) + " centered at chunk " + center + " in world '" + (world == null ? "null" : world.getWorld().getName()) + "' failed to " + (executingTasks ? "execute tasks" : "tick") + ":", thr);
+
+ MinecraftServer.getServer().stopServer();
+ }
+
+ // By using our own thread object, we can use a field for the current region rather than a ThreadLocal.
+ // This is much faster than a thread local, since the thread local has to use a map lookup.
+ private static final class TickThreadRunner extends TickThread {
+
+ private ThreadedRegionizer.ThreadedRegion currentTickingRegion;
+ private RegionizedWorldData currentTickingWorldRegionizedData;
+ private SchedulerThreadPool.SchedulableTick currentTickingTask;
+
+ public TickThreadRunner(final Runnable run, final String name) {
+ super(run, name);
+ }
+ }
+
+ public static abstract class RegionScheduleHandle extends SchedulerThreadPool.SchedulableTick {
+
+ protected long currentTick;
+ protected long lastTickStart;
+
+ protected final TickData tickTimes5s;
+ protected final TickData tickTimes15s;
+ protected final TickData tickTimes1m;
+ protected final TickData tickTimes5m;
+ protected final TickData tickTimes15m;
+ protected TickTime currentTickData;
+ protected Thread currentTickingThread;
+
+ public final TickRegions.TickRegionData region;
+ private final AtomicBoolean cancelled = new AtomicBoolean();
+
+ protected final Schedule tickSchedule;
+
+ private TickRegionScheduler scheduler;
+
+ public RegionScheduleHandle(final TickRegions.TickRegionData region, final long firstStart) {
+ this.currentTick = 0L;
+ this.lastTickStart = SchedulerThreadPool.DEADLINE_NOT_SET;
+ this.tickTimes5s = new TickData(TimeUnit.SECONDS.toNanos(5L));
+ this.tickTimes15s = new TickData(TimeUnit.SECONDS.toNanos(15L));
+ this.tickTimes1m = new TickData(TimeUnit.MINUTES.toNanos(1L));
+ this.tickTimes5m = new TickData(TimeUnit.MINUTES.toNanos(5L));
+ this.tickTimes15m = new TickData(TimeUnit.MINUTES.toNanos(15L));
+ this.region = region;
+
+ this.setScheduledStart(firstStart);
+ this.tickSchedule = new Schedule(firstStart == SchedulerThreadPool.DEADLINE_NOT_SET ? firstStart : firstStart - TIME_BETWEEN_TICKS);
+ }
+
+ /**
+ * Subclasses should call this instead of {@link ca.spottedleaf.concurrentutil.scheduler.SchedulerThreadPool.SchedulableTick#setScheduledStart(long)}
+ * so that the tick schedule and scheduled start remain synchronised
+ */
+ protected final void updateScheduledStart(final long to) {
+ this.setScheduledStart(to);
+ this.tickSchedule.setLastPeriod(to == SchedulerThreadPool.DEADLINE_NOT_SET ? to : to - TIME_BETWEEN_TICKS);
+ }
+
+ public final void markNonSchedulable() {
+ this.cancelled.set(true);
+ }
+
+ public final boolean isMarkedAsNonSchedulable() {
+ return this.cancelled.get();
+ }
+
+ protected abstract boolean tryMarkTicking();
+
+ protected abstract boolean markNotTicking();
+
+ protected abstract void tickRegion(final int tickCount, final long startTime, final long scheduledEnd);
+
+ protected abstract boolean runRegionTasks(final BooleanSupplier canContinue);
+
+ protected abstract boolean hasIntermediateTasks();
+
+ @Override
+ public final boolean hasTasks() {
+ return this.hasIntermediateTasks();
+ }
+
+ @Override
+ public final Boolean runTasks(final BooleanSupplier canContinue) {
+ if (this.cancelled.get()) {
+ return null;
+ }
+
+ final long cpuStart = MEASURE_CPU_TIME ? THREAD_MX_BEAN.getCurrentThreadCpuTime() : 0L;
+ final long tickStart = System.nanoTime();
+
+ if (!this.tryMarkTicking()) {
+ if (!this.cancelled.get()) {
+ throw new IllegalStateException("Scheduled region should be acquirable");
+ }
+ // region was killed
+ return null;
+ }
+
+ TickRegionScheduler.setTickTask(this);
+ if (this.region != null) {
+ TickRegionScheduler.setTickingRegion(this.region.region);
+ }
+
+ synchronized (this) {
+ this.currentTickData = new TickTime(
+ SchedulerThreadPool.DEADLINE_NOT_SET, SchedulerThreadPool.DEADLINE_NOT_SET, tickStart, cpuStart,
+ SchedulerThreadPool.DEADLINE_NOT_SET, SchedulerThreadPool.DEADLINE_NOT_SET, MEASURE_CPU_TIME,
+ false
+ );
+ this.currentTickingThread = Thread.currentThread();
+ }
+
+ final boolean ret;
+ try {
+ ret = this.runRegionTasks(() -> {
+ return !RegionScheduleHandle.this.cancelled.get() && canContinue.getAsBoolean();
+ });
+ } catch (final Throwable thr) {
+ this.scheduler.regionFailed(this, true, thr);
+ if (thr instanceof ThreadDeath) {
+ throw (ThreadDeath)thr;
+ }
+ // don't release region for another tick
+ return null;
+ } finally {
+ TickRegionScheduler.setTickTask(null);
+ if (this.region != null) {
+ TickRegionScheduler.setTickingRegion(null);
+ }
+ final long tickEnd = System.nanoTime();
+ final long cpuEnd = MEASURE_CPU_TIME ? THREAD_MX_BEAN.getCurrentThreadCpuTime() : 0L;
+
+ final TickTime time = new TickTime(
+ SchedulerThreadPool.DEADLINE_NOT_SET, SchedulerThreadPool.DEADLINE_NOT_SET,
+ tickStart, cpuStart, tickEnd, cpuEnd, MEASURE_CPU_TIME, false
+ );
+
+ this.addTickTime(time);
+ }
+
+ return !this.markNotTicking() || this.cancelled.get() ? null : Boolean.valueOf(ret);
+ }
+
+ @Override
+ public final boolean runTick() {
+ // Remember, we are supposed use setScheduledStart if we return true here, otherwise
+ // the scheduler will try to schedule for the same time.
+ if (this.cancelled.get()) {
+ return false;
+ }
+
+ final long cpuStart = MEASURE_CPU_TIME ? THREAD_MX_BEAN.getCurrentThreadCpuTime() : 0L;
+ final long tickStart = System.nanoTime();
+
+ // use max(), don't assume that tickStart >= scheduledStart
+ final int tickCount = Math.max(1, this.tickSchedule.getPeriodsAhead(TIME_BETWEEN_TICKS, tickStart));
+
+ if (!this.tryMarkTicking()) {
+ if (!this.cancelled.get()) {
+ throw new IllegalStateException("Scheduled region should be acquirable");
+ }
+ // region was killed
+ return false;
+ }
+ if (this.cancelled.get()) {
+ this.markNotTicking();
+ // region should be killed
+ return false;
+ }
+
+ TickRegionScheduler.setTickTask(this);
+ if (this.region != null) {
+ TickRegionScheduler.setTickingRegion(this.region.region);
+ }
+ this.incrementTickCount();
+ final long lastTickStart = this.lastTickStart;
+ this.lastTickStart = tickStart;
+
+ final long scheduledStart = this.getScheduledStart();
+ final long scheduledEnd = scheduledStart + TIME_BETWEEN_TICKS;
+
+ synchronized (this) {
+ this.currentTickData = new TickTime(
+ lastTickStart, scheduledStart, tickStart, cpuStart,
+ SchedulerThreadPool.DEADLINE_NOT_SET, SchedulerThreadPool.DEADLINE_NOT_SET, MEASURE_CPU_TIME,
+ true
+ );
+ this.currentTickingThread = Thread.currentThread();
+ }
+
+ try {
+ // next start isn't updated until the end of this tick
+ this.tickRegion(tickCount, tickStart, scheduledEnd);
+ } catch (final Throwable thr) {
+ this.scheduler.regionFailed(this, false, thr);
+ if (thr instanceof ThreadDeath) {
+ throw (ThreadDeath)thr;
+ }
+ // regionFailed will schedule a shutdown, so we should avoid letting this region tick further
+ return false;
+ } finally {
+ TickRegionScheduler.setTickTask(null);
+ if (this.region != null) {
+ TickRegionScheduler.setTickingRegion(null);
+ }
+ final long tickEnd = System.nanoTime();
+ final long cpuEnd = MEASURE_CPU_TIME ? THREAD_MX_BEAN.getCurrentThreadCpuTime() : 0L;
+
+ // in order to ensure all regions get their chance at scheduling, we have to ensure that regions
+ // that exceed the max tick time are not always prioritised over everything else. Thus, we use the greatest
+ // of the current time and "ideal" next tick start.
+ this.tickSchedule.advanceBy(tickCount, TIME_BETWEEN_TICKS);
+ this.setScheduledStart(TimeUtil.getGreatestTime(tickEnd, this.tickSchedule.getDeadline(TIME_BETWEEN_TICKS)));
+
+ final TickTime time = new TickTime(
+ lastTickStart, scheduledStart, tickStart, cpuStart, tickEnd, cpuEnd, MEASURE_CPU_TIME, true
+ );
+
+ this.addTickTime(time);
+ }
+
+ // Only AFTER updating the tickStart
+ return this.markNotTicking() && !this.cancelled.get();
+ }
+
+ /**
+ * Only safe to call if this tick data matches the current ticking region.
+ */
+ private void addTickTime(final TickTime time) {
+ synchronized (this) {
+ this.currentTickData = null;
+ this.currentTickingThread = null;
+ this.tickTimes5s.addDataFrom(time);
+ this.tickTimes15s.addDataFrom(time);
+ this.tickTimes1m.addDataFrom(time);
+ this.tickTimes5m.addDataFrom(time);
+ this.tickTimes15m.addDataFrom(time);
+ }
+ }
+
+ private TickTime adjustCurrentTickData(final long tickEnd) {
+ final TickTime currentTickData = this.currentTickData;
+ if (currentTickData == null) {
+ return null;
+ }
+
+ final long cpuEnd = MEASURE_CPU_TIME ? THREAD_MX_BEAN.getThreadCpuTime(this.currentTickingThread.getId()) : 0L;
+
+ return new TickTime(
+ currentTickData.previousTickStart(), currentTickData.scheduledTickStart(),
+ currentTickData.tickStart(), currentTickData.tickStartCPU(),
+ tickEnd, cpuEnd,
+ MEASURE_CPU_TIME, currentTickData.isTickExecution()
+ );
+ }
+
+ public final TickData.TickReportData getTickReport5s(final long currTime) {
+ synchronized (this) {
+ return this.tickTimes5s.generateTickReport(this.adjustCurrentTickData(currTime), currTime);
+ }
+ }
+
+ public final TickData.TickReportData getTickReport15s(final long currTime) {
+ synchronized (this) {
+ return this.tickTimes15s.generateTickReport(this.adjustCurrentTickData(currTime), currTime);
+ }
+ }
+
+ public final TickData.TickReportData getTickReport1m(final long currTime) {
+ synchronized (this) {
+ return this.tickTimes1m.generateTickReport(this.adjustCurrentTickData(currTime), currTime);
+ }
+ }
+
+ public final TickData.TickReportData getTickReport5m(final long currTime) {
+ synchronized (this) {
+ return this.tickTimes5m.generateTickReport(this.adjustCurrentTickData(currTime), currTime);
+ }
+ }
+
+ public final TickData.TickReportData getTickReport15m(final long currTime) {
+ synchronized (this) {
+ return this.tickTimes15m.generateTickReport(this.adjustCurrentTickData(currTime), currTime);
+ }
+ }
+
+ /**
+ * Only safe to call if this tick data matches the current ticking region.
+ */
+ private void incrementTickCount() {
+ ++this.currentTick;
+ }
+
+ /**
+ * Only safe to call if this tick data matches the current ticking region.
+ */
+ public final long getCurrentTick() {
+ return this.currentTick;
+ }
+
+ protected final void setCurrentTick(final long value) {
+ this.currentTick = value;
+ }
+ }
+
+ // All time units are in nanoseconds.
+ public static final record TickTime(
+ long previousTickStart,
+ long scheduledTickStart,
+ long tickStart,
+ long tickStartCPU,
+ long tickEnd,
+ long tickEndCPU,
+ boolean supportCPUTime,
+ boolean isTickExecution
+ ) {
+ /**
+ * The difference between the start tick time and the scheduled start tick time. This value is
+ * < 0 if the tick started before the scheduled tick time.
+ * Only valid when {@link #isTickExecution()} is {@code true}.
+ */
+ public final long startOvershoot() {
+ return this.tickStart - this.scheduledTickStart;
+ }
+
+ /**
+ * The difference from the end tick time and the start tick time. Always >= 0 (unless nanoTime is just wrong).
+ */
+ public final long tickLength() {
+ return this.tickEnd - this.tickStart;
+ }
+
+ /**
+ * The total CPU time from the start tick time to the end tick time. Generally should be equal to the tickLength,
+ * unless there is CPU starvation or the tick thread was blocked by I/O or other tasks. Returns Long.MIN_VALUE
+ * if CPU time measurement is not supported.
+ */
+ public final long tickCpuTime() {
+ if (!this.supportCPUTime()) {
+ return Long.MIN_VALUE;
+ }
+ return this.tickEndCPU - this.tickStartCPU;
+ }
+
+ /**
+ * The difference in time from the start of the last tick to the start of the current tick. If there is no
+ * last tick, then this value is max(TIME_BETWEEN_TICKS, tickLength).
+ * Only valid when {@link #isTickExecution()} is {@code true}.
+ */
+ public final long differenceFromLastTick() {
+ if (this.hasLastTick()) {
+ return this.tickStart - this.previousTickStart;
+ }
+ return Math.max(TIME_BETWEEN_TICKS, this.tickLength());
+ }
+
+ /**
+ * Returns whether there was a tick that occurred before this one.
+ * Only valid when {@link #isTickExecution()} is {@code true}.
+ */
+ public boolean hasLastTick() {
+ return this.previousTickStart != SchedulerThreadPool.DEADLINE_NOT_SET;
+ }
+
+ /*
+ * Remember, this is the expected behavior of the following:
+ *
+ * MSPT: Time per tick. This does not include overshoot time, just the tickLength().
+ *
+ * TPS: The number of ticks per second. It should be ticks / (sum of differenceFromLastTick).
+ */
+ }
+}
diff --git a/src/main/java/io/papermc/paper/threadedregions/TickRegions.java b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java
index d5d39e9c1f326e91010237b0db80d527ac52f4d6..6c76c70574642aa4f3a8fce74e4608781ce132ec 100644
--- a/src/main/java/io/papermc/paper/threadedregions/TickRegions.java
+++ b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java
@@ -1,9 +1,392 @@
package io.papermc.paper.threadedregions;
-// placeholder class for Folia
-public class TickRegions {
+import ca.spottedleaf.concurrentutil.scheduler.SchedulerThreadPool;
+import ca.spottedleaf.concurrentutil.util.TimeUtil;
+import com.mojang.logging.LogUtils;
+import io.papermc.paper.chunk.system.scheduling.ChunkHolderManager;
+import io.papermc.paper.configuration.GlobalConfiguration;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceMap;
+import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Reference2ReferenceMap;
+import it.unimi.dsi.fastutil.objects.Reference2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerLevel;
+import org.slf4j.Logger;
+import java.util.Iterator;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.BooleanSupplier;
+
+public final class TickRegions implements ThreadedRegionizer.RegionCallbacks {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
public static int getRegionChunkShift() {
return 4;
}
+
+ private static boolean initialised;
+ private static TickRegionScheduler scheduler;
+
+ public static TickRegionScheduler getScheduler() {
+ return scheduler;
+ }
+
+ public static void init(final GlobalConfiguration.ThreadedRegions config) {
+ if (initialised) {
+ return;
+ }
+ initialised = true;
+
+ int tickThreads;
+ if (config.threads <= 0) {
+ tickThreads = Runtime.getRuntime().availableProcessors() / 2;
+ if (tickThreads <= 4) {
+ tickThreads = 1;
+ } else {
+ tickThreads = tickThreads / 4;
+ }
+ } else {
+ tickThreads = config.threads;
+ }
+
+ scheduler = new TickRegionScheduler(tickThreads);
+ LOGGER.info("Regionised ticking is enabled with " + tickThreads + " tick threads");
+ }
+
+ @Override
+ public TickRegionData createNewData(final ThreadedRegionizer.ThreadedRegion region) {
+ return new TickRegionData(region);
+ }
+
+ @Override
+ public TickRegionSectionData createNewSectionData(final int sectionX, final int sectionZ, final int sectionShift) {
+ return null;
+ }
+
+ @Override
+ public void onRegionCreate(final ThreadedRegionizer.ThreadedRegion region) {
+ final TickRegionData data = region.getData();
+ // post-region merge/split regioninfo update
+ data.getRegionStats().updateFrom(data.getOrCreateRegionizedData(data.world.worldRegionData));
+ }
+
+ @Override
+ public void onRegionDestroy(final ThreadedRegionizer.ThreadedRegion region) {
+ // nothing for now
+ }
+
+ @Override
+ public void onRegionActive(final ThreadedRegionizer.ThreadedRegion region) {
+ final TickRegionData data = region.getData();
+
+ data.tickHandle.checkInitialSchedule();
+ scheduler.scheduleRegion(data.tickHandle);
+ }
+
+ @Override
+ public void onRegionInactive(final ThreadedRegionizer.ThreadedRegion region) {
+ final TickRegionData data = region.getData();
+
+ scheduler.descheduleRegion(data.tickHandle);
+ // old handle cannot be scheduled anymore, copy to a new handle
+ data.tickHandle = data.tickHandle.copy();
+ }
+
+ public static final class TickRegionSectionData implements ThreadedRegionizer.ThreadedRegionSectionData {}
+
+ public static final class RegionStats {
+
+ private final AtomicInteger entityCount = new AtomicInteger();
+ private final AtomicInteger playerCount = new AtomicInteger();
+ private final AtomicInteger chunkCount = new AtomicInteger();
+
+ public int getEntityCount() {
+ return this.entityCount.get();
+ }
+
+ public int getPlayerCount() {
+ return this.playerCount.get();
+ }
+
+ public int getChunkCount() {
+ return this.chunkCount.get();
+ }
+
+ void updateFrom(final RegionizedWorldData data) {
+ this.entityCount.setRelease(data == null ? 0 : data.getEntityCount());
+ this.playerCount.setRelease(data == null ? 0 : data.getPlayerCount());
+ this.chunkCount.setRelease(data == null ? 0 : data.getChunkCount());
+ }
+
+ static void updateCurrentRegion() {
+ TickRegionScheduler.getCurrentRegion().getData().getRegionStats().updateFrom(TickRegionScheduler.getCurrentRegionizedWorldData());
+ }
+ }
+
+ public static final class TickRegionData implements ThreadedRegionizer.ThreadedRegionData {
+
+ private static final AtomicLong ID_GENERATOR = new AtomicLong();
+ /** Never 0L, since 0L is reserved for global region. */
+ public final long id = ID_GENERATOR.incrementAndGet();
+
+ public final ThreadedRegionizer.ThreadedRegion region;
+ public final ServerLevel world;
+
+ // generic regionised data
+ private final Reference2ReferenceOpenHashMap, Object> regionizedData = new Reference2ReferenceOpenHashMap<>();
+
+ // tick data
+ private ConcreteRegionTickHandle tickHandle = new ConcreteRegionTickHandle(this, SchedulerThreadPool.DEADLINE_NOT_SET);
+
+ // queue data
+ private final RegionizedTaskQueue.RegionTaskQueueData taskQueueData;
+
+ // chunk holder manager data
+ private final ChunkHolderManager.HolderManagerRegionData holderManagerRegionData = new ChunkHolderManager.HolderManagerRegionData();
+
+ // async-safe read-only region data
+ private final RegionStats regionStats;
+
+ private TickRegionData(final ThreadedRegionizer.ThreadedRegion region) {
+ this.region = region;
+ this.world = region.regioniser.world;
+ this.taskQueueData = new RegionizedTaskQueue.RegionTaskQueueData(this.world.taskQueueRegionData);
+ this.regionStats = new RegionStats();
+ }
+
+ public RegionStats getRegionStats() {
+ return this.regionStats;
+ }
+
+ public RegionizedTaskQueue.RegionTaskQueueData getTaskQueueData() {
+ return this.taskQueueData;
+ }
+
+ // the value returned can be invalidated at any time, except when the caller
+ // is ticking this region
+ public TickRegionScheduler.RegionScheduleHandle getRegionSchedulingHandle() {
+ return this.tickHandle;
+ }
+
+ public long getCurrentTick() {
+ return this.tickHandle.getCurrentTick();
+ }
+
+ public ChunkHolderManager.HolderManagerRegionData getHolderManagerRegionData() {
+ return this.holderManagerRegionData;
+ }
+
+ T getRegionizedData(final RegionizedData regionizedData) {
+ return (T)this.regionizedData.get(regionizedData);
+ }
+
+ T getOrCreateRegionizedData(final RegionizedData regionizedData) {
+ T ret = (T)this.regionizedData.get(regionizedData);
+
+ if (ret != null) {
+ return ret;
+ }
+
+ ret = regionizedData.createNewValue();
+ this.regionizedData.put(regionizedData, ret);
+
+ return ret;
+ }
+
+ @Override
+ public void split(final ThreadedRegionizer regioniser,
+ final Long2ReferenceOpenHashMap> into,
+ final ReferenceOpenHashSet> regions) {
+ final int shift = regioniser.sectionChunkShift;
+
+ // tick data
+ // note: here it is OK force us to access tick handle, as this region is owned (and thus not scheduled),
+ // and the other regions to split into are not scheduled yet.
+ for (final ThreadedRegionizer.ThreadedRegion region : regions) {
+ final TickRegionData data = region.getData();
+ data.tickHandle.copyDeadlineAndTickCount(this.tickHandle);
+ }
+
+ // generic regionised data
+ for (final Iterator, Object>> dataIterator = this.regionizedData.reference2ReferenceEntrySet().fastIterator();
+ dataIterator.hasNext();) {
+ final Reference2ReferenceMap.Entry, Object> regionDataEntry = dataIterator.next();
+ final RegionizedData> data = regionDataEntry.getKey();
+ final Object from = regionDataEntry.getValue();
+
+ final ReferenceOpenHashSet