mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-08 11:50:32 +01:00
175 lines
8.1 KiB
Diff
175 lines
8.1 KiB
Diff
From 9b18e4094e553dec3e3002481683d86634c5bb77 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Fri, 4 Mar 2016 18:18:37 -0600
|
|
Subject: [PATCH] Chunk save queue improvements
|
|
|
|
For some unknown reason, Minecraft is sleeping 10ms between every single chunk being saved to disk.
|
|
Under high chunk load/unload activity (lots of movement / teleporting), this causes the chunk unload queue
|
|
to build up in size.
|
|
|
|
This has multiple impacts:
|
|
1) Performance of the unload queue itself - The save thread is pretty ineffecient for how it accesses it
|
|
By letting the queue get larger, checking and popping work off the queue can get less performant.
|
|
2) Performance of chunk loading - As with #1, chunk loads also have to check this queue when loading
|
|
chunk data so that it doesn't load stale data if new data is pending write to disk.
|
|
3) Memory Usage - The entire chunk has been serialized to NBT, and now sits in this queue. This leads to
|
|
elevated memory usage, and then the objects used in the serialization sit around longer than needed,
|
|
resulting in promotion to Old Generation instead of dying young.
|
|
|
|
To optimize this, we change the entire unload queue to be a proper queue. This improves the behavior of popping
|
|
the first queued chunk off, instead of abusing iterators like Mojang was doing.
|
|
|
|
This also improves reliability of chunk saving, as the previous hack job had a race condition that could
|
|
fail to save some chunks.
|
|
|
|
Then finally, Sleeping will by default be removed, but due to known issues with 1.9, a config option was added.
|
|
But if sleeps are to remain enabled, we at least lower the sleep interval so it doesn't have as much negative impact.
|
|
|
|
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
index e55ff98..2a391d5 100644
|
|
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
@@ -169,4 +169,10 @@ public class PaperConfig {
|
|
public static void chunkLoadThreads() {
|
|
minChunkLoadThreads = Math.min(6, getInt("settings.min-chunk-load-threads", 2)); // Keep people from doing stupid things with max of 6
|
|
}
|
|
+
|
|
+ public static boolean enableFileIOThreadSleep;
|
|
+ private static void enableFileIOThreadSleep() {
|
|
+ enableFileIOThreadSleep = getBoolean("settings.sleep-between-chunk-saves", false);
|
|
+ if (enableFileIOThreadSleep) Bukkit.getLogger().info("Enabled sleeping between chunk saves, beware of memory issues");
|
|
+ }
|
|
}
|
|
diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
|
|
index eb13bc9..cbbf95f 100644
|
|
--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
|
|
+++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
|
|
@@ -11,14 +11,17 @@ import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
import java.util.concurrent.ConcurrentHashMap;
|
|
+import java.util.concurrent.ConcurrentLinkedQueue; // Paper
|
|
import org.apache.logging.log4j.LogManager;
|
|
import org.apache.logging.log4j.Logger;
|
|
|
|
public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
|
|
|
|
+ private ConcurrentLinkedQueue<QueuedChunk> queue = new ConcurrentLinkedQueue<QueuedChunk>(); // Paper - Chunk queue improvements
|
|
+ private final Object lock = new Object(); // Paper - Chunk queue improvements
|
|
private static final Logger a = LogManager.getLogger();
|
|
private Map<ChunkCoordIntPair, NBTTagCompound> b = new ConcurrentHashMap();
|
|
- private Set<ChunkCoordIntPair> c = Collections.newSetFromMap(new ConcurrentHashMap());
|
|
+ //private Set<ChunkCoordIntPair> c = Collections.newSetFromMap(new ConcurrentHashMap()); // Paper - Chunk queue improvements
|
|
private final File d;
|
|
private final DataConverterManager e;
|
|
private boolean f = false;
|
|
@@ -32,11 +35,11 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
|
|
public boolean chunkExists(World world, int i, int j) {
|
|
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i, j);
|
|
|
|
- if (this.c.contains(chunkcoordintpair)) {
|
|
+ //if (this.c.contains(chunkcoordintpair)) { // Paper - Chunk queue improvements
|
|
if (this.b.containsKey(chunkcoordintpair)) {
|
|
return true;
|
|
}
|
|
- }
|
|
+ //} // Paper - Chunk queue improvements
|
|
|
|
// Paper start - Don't create region files when checking that they exist
|
|
final RegionFile region = RegionFileCache.a(this.d, i, j, false);
|
|
@@ -139,28 +142,32 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
|
|
}
|
|
|
|
protected void a(ChunkCoordIntPair chunkcoordintpair, NBTTagCompound nbttagcompound) {
|
|
- if (!this.c.contains(chunkcoordintpair)) {
|
|
+ synchronized (lock) { // Paper - Chunk queue improvements
|
|
this.b.put(chunkcoordintpair, nbttagcompound);
|
|
}
|
|
+ queue.add(new QueuedChunk(chunkcoordintpair, nbttagcompound)); // Paper - Chunk queue improvements
|
|
|
|
FileIOThread.a().a(this);
|
|
}
|
|
|
|
public boolean c() {
|
|
- if (this.b.isEmpty()) {
|
|
+ // Paper start - Chunk queue improvements
|
|
+ QueuedChunk chunk = queue.poll();
|
|
+ if (chunk == null) {
|
|
+ // Paper - end
|
|
if (this.f) {
|
|
ChunkRegionLoader.a.info("ThreadedAnvilChunkStorage ({}): All chunks are saved", new Object[] { this.d.getName()});
|
|
}
|
|
|
|
return false;
|
|
} else {
|
|
- ChunkCoordIntPair chunkcoordintpair = (ChunkCoordIntPair) this.b.keySet().iterator().next();
|
|
+ ChunkCoordIntPair chunkcoordintpair = chunk.coords; // Paper - Chunk queue improvements
|
|
|
|
boolean flag;
|
|
|
|
try {
|
|
- this.c.add(chunkcoordintpair);
|
|
- NBTTagCompound nbttagcompound = (NBTTagCompound) this.b.remove(chunkcoordintpair);
|
|
+ //this.c.add(chunkcoordintpair);
|
|
+ NBTTagCompound nbttagcompound = chunk.compound; // Paper - Chunk queue improvements
|
|
|
|
if (nbttagcompound != null) {
|
|
try {
|
|
@@ -169,10 +176,11 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
|
|
ChunkRegionLoader.a.error("Failed to save chunk", exception);
|
|
}
|
|
}
|
|
+ synchronized (lock) { if (this.b.get(chunkcoordintpair) == nbttagcompound) { this.b.remove(chunkcoordintpair); } }// Paper - This will not equal if a newer version is still pending
|
|
|
|
flag = true;
|
|
} finally {
|
|
- this.c.remove(chunkcoordintpair);
|
|
+ //this.c.remove(chunkcoordintpair); // Paper
|
|
}
|
|
|
|
return flag;
|
|
@@ -503,4 +511,16 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
|
|
return entity;
|
|
}
|
|
}
|
|
+
|
|
+ // Paper start - Chunk queue improvements
|
|
+ private static class QueuedChunk {
|
|
+ public ChunkCoordIntPair coords;
|
|
+ public NBTTagCompound compound;
|
|
+
|
|
+ public QueuedChunk(ChunkCoordIntPair coords, NBTTagCompound compound) {
|
|
+ this.coords = coords;
|
|
+ this.compound = compound;
|
|
+ }
|
|
+ }
|
|
+ // Paper end
|
|
}
|
|
diff --git a/src/main/java/net/minecraft/server/FileIOThread.java b/src/main/java/net/minecraft/server/FileIOThread.java
|
|
index 4733f94..113aea2 100644
|
|
--- a/src/main/java/net/minecraft/server/FileIOThread.java
|
|
+++ b/src/main/java/net/minecraft/server/FileIOThread.java
|
|
@@ -39,11 +39,15 @@ public class FileIOThread implements Runnable {
|
|
++this.d;
|
|
}
|
|
|
|
- try {
|
|
- Thread.sleep(this.e ? 0L : 10L);
|
|
- } catch (InterruptedException interruptedexception) {
|
|
- interruptedexception.printStackTrace();
|
|
+ // Paper start - Add toggle
|
|
+ if (com.destroystokyo.paper.PaperConfig.enableFileIOThreadSleep) {
|
|
+ try {
|
|
+ Thread.sleep(this.e ? 0L : 2L);
|
|
+ } catch (InterruptedException interruptedexception) {
|
|
+ interruptedexception.printStackTrace();
|
|
+ }
|
|
}
|
|
+ // Paper end
|
|
}
|
|
|
|
if (this.b.isEmpty()) {
|
|
--
|
|
2.8.0
|
|
|