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Paper/patches/server/0736-Do-not-copy-visible-chunks.patch
FivePB (Xer) c7e118b394
Update modern forwarding to v3 (#8219)
2022-08-08 16:25:41 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 21 Mar 2021 11:22:10 -0700
Subject: [PATCH] Do not copy visible chunks
For servers with a lot of chunk holders, copying for each
tickDistanceManager call can take up quite a bit in
the function. I saw approximately 1/3rd of the function
on the copy.
diff --git a/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java
index 029ad37df71e74d9feb57e4b31b3602e55d49113..4b367982fae4662c326aa247824e9c4185896de1 100644
--- a/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java
+++ b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java
@@ -90,7 +90,7 @@ public final class ChunkDebugCommand implements PaperSubcommand {
int ticking = 0;
int entityTicking = 0;
- for (final ChunkHolder chunk : world.getChunkSource().chunkMap.updatingChunkMap.values()) {
+ for (final ChunkHolder chunk : world.getChunkSource().chunkMap.updatingChunks.getUpdatingMap().values()) { // Paper - change updating chunks map
if (chunk.getFullChunkNowUnchecked() == null) {
continue;
}
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index 613988c9ea892ab15516e1c8b4f376d52415ae34..1eb71004a19866590a3d27fa6e72842934989177 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -625,7 +625,7 @@ public final class MCUtil {
ServerLevel world = ((org.bukkit.craftbukkit.CraftWorld)bukkitWorld).getHandle();
ChunkMap chunkMap = world.getChunkSource().chunkMap;
- Long2ObjectLinkedOpenHashMap<ChunkHolder> visibleChunks = chunkMap.visibleChunkMap;
+ Long2ObjectLinkedOpenHashMap<ChunkHolder> visibleChunks = chunkMap.updatingChunks.getVisibleMap(); // Paper
DistanceManager chunkMapDistance = chunkMap.distanceManager;
List<ChunkHolder> allChunks = new ArrayList<>(visibleChunks.values());
List<ServerPlayer> players = world.players;
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 1bbb15354e457a6056d380f9ef318a4661f460e3..b3dc2e71230304ab42b9dd935025f0bd3117bd01 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -123,9 +123,11 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
private static final int MIN_VIEW_DISTANCE = 3;
public static final int MAX_VIEW_DISTANCE = 33;
public static final int MAX_CHUNK_DISTANCE = 33 + ChunkStatus.maxDistance();
+ // Paper start - Don't copy
+ public final com.destroystokyo.paper.util.map.QueuedChangesMapLong2Object<ChunkHolder> updatingChunks = new com.destroystokyo.paper.util.map.QueuedChangesMapLong2Object<>();
+ // Paper end - Don't copy
public static final int FORCED_TICKET_LEVEL = 31;
- public final Long2ObjectLinkedOpenHashMap<ChunkHolder> updatingChunkMap = new Long2ObjectLinkedOpenHashMap();
- public volatile Long2ObjectLinkedOpenHashMap<ChunkHolder> visibleChunkMap;
+ // Paper - Don't copy
private final Long2ObjectLinkedOpenHashMap<ChunkHolder> pendingUnloads;
public final LongSet entitiesInLevel;
public final ServerLevel level;
@@ -318,7 +320,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
boolean unloadingPlayerChunk = false; // Paper - do not allow ticket level changes while unloading chunks
public ChunkMap(ServerLevel world, LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, StructureTemplateManager structureTemplateManager, Executor executor, BlockableEventLoop<Runnable> mainThreadExecutor, LightChunkGetter chunkProvider, ChunkGenerator chunkGenerator, ChunkProgressListener worldGenerationProgressListener, ChunkStatusUpdateListener chunkStatusChangeListener, Supplier<DimensionDataStorage> persistentStateManagerFactory, int viewDistance, boolean dsync) {
super(session.getDimensionPath(world.dimension()).resolve("region"), dataFixer, dsync);
- this.visibleChunkMap = this.updatingChunkMap.clone();
+ // Paper - don't copy
this.pendingUnloads = new Long2ObjectLinkedOpenHashMap();
this.entitiesInLevel = new LongOpenHashSet();
this.toDrop = new LongOpenHashSet();
@@ -559,12 +561,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@Nullable
public ChunkHolder getUpdatingChunkIfPresent(long pos) {
- return (ChunkHolder) this.updatingChunkMap.get(pos);
+ return this.updatingChunks.getUpdating(pos); // Paper - Don't copy
}
@Nullable
public ChunkHolder getVisibleChunkIfPresent(long pos) {
- return (ChunkHolder) this.visibleChunkMap.get(pos);
+ // Paper start - Don't copy
+ if (Thread.currentThread() == this.level.thread) {
+ return this.updatingChunks.getVisible(pos);
+ }
+ return this.updatingChunks.getVisibleAsync(pos);
+ // Paper end - Don't copy
}
protected IntSupplier getChunkQueueLevel(long pos) {
@@ -704,9 +711,9 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
};
stringbuilder.append("Updating:").append(System.lineSeparator());
- this.updatingChunkMap.values().forEach(consumer);
+ this.updatingChunks.getUpdatingValuesCopy().forEach(consumer); // Paper
stringbuilder.append("Visible:").append(System.lineSeparator());
- this.visibleChunkMap.values().forEach(consumer);
+ this.updatingChunks.getVisibleValuesCopy().forEach(consumer); // Paper
CrashReport crashreport = CrashReport.forThrowable(exception, "Chunk loading");
CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Chunk loading");
@@ -757,7 +764,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
// Paper end
}
- this.updatingChunkMap.put(pos, holder);
+ this.updatingChunks.queueUpdate(pos, holder); // Paper - Don't copy
this.modified = true;
}
@@ -837,7 +844,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
protected void saveAllChunks(boolean flush) {
if (flush) {
- List<ChunkHolder> list = (List) this.visibleChunkMap.values().stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).collect(Collectors.toList());
+ List<ChunkHolder> list = (List) this.updatingChunks.getVisibleValuesCopy().stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).collect(Collectors.toList()); // Paper
MutableBoolean mutableboolean = new MutableBoolean();
do {
@@ -868,7 +875,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
//this.flushWorker(); // Paper - nuke IOWorker
this.level.asyncChunkTaskManager.flush(); // Paper - flush to preserve behavior compat with pre-async behaviour
} else {
- this.visibleChunkMap.values().forEach(this::saveChunkIfNeeded);
+ this.updatingChunks.getVisibleValuesCopy().forEach(this::saveChunkIfNeeded); // Paper
}
}
@@ -891,14 +898,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
public boolean hasWork() {
- return this.lightEngine.hasLightWork() || !this.pendingUnloads.isEmpty() || !this.updatingChunkMap.isEmpty() || this.poiManager.hasWork() || !this.toDrop.isEmpty() || !this.unloadQueue.isEmpty() || this.queueSorter.hasWork() || this.distanceManager.hasTickets();
+ return this.lightEngine.hasLightWork() || !this.pendingUnloads.isEmpty() || !this.updatingChunks.getUpdatingValuesCopy().isEmpty() || this.poiManager.hasWork() || !this.toDrop.isEmpty() || !this.unloadQueue.isEmpty() || this.queueSorter.hasWork() || this.distanceManager.hasTickets(); // Paper
}
private void processUnloads(BooleanSupplier shouldKeepTicking) {
LongIterator longiterator = this.toDrop.iterator();
for (int i = 0; longiterator.hasNext() && (shouldKeepTicking.getAsBoolean() || i < 200 || this.toDrop.size() > 2000); longiterator.remove()) {
long j = longiterator.nextLong();
- ChunkHolder playerchunk = (ChunkHolder) this.updatingChunkMap.remove(j);
+ ChunkHolder playerchunk = this.updatingChunks.queueRemove(j); // Paper - Don't copy
if (playerchunk != null) {
playerchunk.onChunkRemove(); // Paper
@@ -993,7 +1000,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
if (!this.modified) {
return false;
} else {
- this.visibleChunkMap = this.updatingChunkMap.clone();
+ // Paper start - Don't copy
+ synchronized (this.updatingChunks) {
+ this.updatingChunks.performUpdates();
+ }
+ // Paper end - Don't copy
+
this.modified = false;
return true;
}
@@ -1493,7 +1505,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
this.viewDistance = j;
this.distanceManager.updatePlayerTickets(this.viewDistance + 1);
- ObjectIterator objectiterator = this.updatingChunkMap.values().iterator();
+ Iterator objectiterator = this.updatingChunks.getVisibleValuesCopy().iterator(); // Paper
while (objectiterator.hasNext()) {
ChunkHolder playerchunk = (ChunkHolder) objectiterator.next();
@@ -1536,7 +1548,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
public int size() {
- return this.visibleChunkMap.size();
+ return this.updatingChunks.getVisibleMap().size(); // Paper - Don't copy
}
public DistanceManager getDistanceManager() {
@@ -1544,13 +1556,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
protected Iterable<ChunkHolder> getChunks() {
- return Iterables.unmodifiableIterable(this.visibleChunkMap.values());
+ return Iterables.unmodifiableIterable(this.updatingChunks.getVisibleValuesCopy()); // Paper
}
void dumpChunks(Writer writer) throws IOException {
CsvOutput csvwriter = CsvOutput.builder().addColumn("x").addColumn("z").addColumn("level").addColumn("in_memory").addColumn("status").addColumn("full_status").addColumn("accessible_ready").addColumn("ticking_ready").addColumn("entity_ticking_ready").addColumn("ticket").addColumn("spawning").addColumn("block_entity_count").addColumn("ticking_ticket").addColumn("ticking_level").addColumn("block_ticks").addColumn("fluid_ticks").build(writer);
TickingTracker tickingtracker = this.distanceManager.tickingTracker();
- ObjectBidirectionalIterator objectbidirectionaliterator = this.visibleChunkMap.long2ObjectEntrySet().iterator();
+ ObjectBidirectionalIterator objectbidirectionaliterator = this.updatingChunks.getVisibleMap().clone().long2ObjectEntrySet().fastIterator(); // Paper
while (objectbidirectionaliterator.hasNext()) {
Entry<ChunkHolder> entry = (Entry) objectbidirectionaliterator.next();
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 21bf39ef5b20ecc989881b07c4e6b90c68540afd..beee040abf846492cefabe985c5286b00fc6bc63 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -167,7 +167,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public int getTileEntityCount() {
// We don't use the full world tile entity list, so we must iterate chunks
- Long2ObjectLinkedOpenHashMap<ChunkHolder> chunks = world.getChunkSource().chunkMap.visibleChunkMap;
+ Long2ObjectLinkedOpenHashMap<ChunkHolder> chunks = world.getChunkSource().chunkMap.updatingChunks.getVisibleMap(); // Paper - change updating chunks map
int size = 0;
for (ChunkHolder playerchunk : chunks.values()) {
net.minecraft.world.level.chunk.LevelChunk chunk = playerchunk.getTickingChunk();
@@ -188,7 +188,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
public int getChunkCount() {
int ret = 0;
- for (ChunkHolder chunkHolder : world.getChunkSource().chunkMap.visibleChunkMap.values()) {
+ for (ChunkHolder chunkHolder : world.getChunkSource().chunkMap.updatingChunks.getVisibleMap().values()) { // Paper - change updating chunks map
if (chunkHolder.getTickingChunk() != null) {
++ret;
}
@@ -345,7 +345,18 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public Chunk[] getLoadedChunks() {
- Long2ObjectLinkedOpenHashMap<ChunkHolder> chunks = this.world.getChunkSource().chunkMap.visibleChunkMap;
+ // Paper start
+ if (Thread.currentThread() != world.getLevel().thread) {
+ // Paper start - change updating chunks map
+ Long2ObjectLinkedOpenHashMap<ChunkHolder> chunks;
+ synchronized (world.getChunkSource().chunkMap.updatingChunks) {
+ chunks = world.getChunkSource().chunkMap.updatingChunks.getVisibleMap().clone();
+ }
+ return chunks.values().stream().map(ChunkHolder::getFullChunkNow).filter(Objects::nonNull).map(net.minecraft.world.level.chunk.LevelChunk::getBukkitChunk).toArray(Chunk[]::new);
+ // Paper end - change updating chunks map
+ }
+ // Paper end
+ Long2ObjectLinkedOpenHashMap<ChunkHolder> chunks = this.world.getChunkSource().chunkMap.updatingChunks.getVisibleMap(); // Paper - change updating chunks map
return chunks.values().stream().map(ChunkHolder::getFullChunkNow).filter(Objects::nonNull).map(net.minecraft.world.level.chunk.LevelChunk::getBukkitChunk).toArray(Chunk[]::new);
}
@@ -421,7 +432,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public boolean refreshChunk(int x, int z) {
- ChunkHolder playerChunk = this.world.getChunkSource().chunkMap.visibleChunkMap.get(ChunkPos.asLong(x, z));
+ ChunkHolder playerChunk = this.world.getChunkSource().chunkMap.updatingChunks.getVisibleMap().get(ChunkPos.asLong(x, z));
if (playerChunk == null) return false;
playerChunk.getTickingChunkFuture().thenAccept(either -> {
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