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b91976d7a3a3a216458efa1301c7d6ee470dbb2a
Gale/patches/server/0159-Run-chunk-cache-tasks-on-base-thread-pool.patch
Martijn Muijsers b91976d7a3 Sort main thread chunk cache tasks by distance
2023-02-10 21:07:25 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Sun, 29 Jan 2023 22:37:12 +0100
Subject: [PATCH] Run chunk cache tasks on base thread pool
License: AGPL-3.0 (https://www.gnu.org/licenses/agpl-3.0.html)
Gale - https://galemc.org
diff --git a/src/main/java/com/destroystokyo/paper/util/misc/DistanceTrackingAreaMap.java b/src/main/java/com/destroystokyo/paper/util/misc/DistanceTrackingAreaMap.java
index 896c3ff7ddb07f1f6f05f90e1e3fe7fb615071d4..1dfee2b857f2a37fa1bb9b8e163809963b408613 100644
--- a/src/main/java/com/destroystokyo/paper/util/misc/DistanceTrackingAreaMap.java
+++ b/src/main/java/com/destroystokyo/paper/util/misc/DistanceTrackingAreaMap.java
@@ -15,7 +15,7 @@ public abstract class DistanceTrackingAreaMap<E> extends AreaMap<E> {
this.chunkToNearestDistance.defaultReturnValue(-1);
}
- protected final DistanceChangeCallback<E> distanceChangeCallback;
+ public DistanceChangeCallback<E> distanceChangeCallback; // Gale - base thread pool - chunk-sorted cache tasks - private -> public, final -> non-final
public DistanceTrackingAreaMap() {
this(new PooledLinkedHashSets<>());
diff --git a/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java
index 0b060183429f4c72ec767075538477b4302bbf0d..cef1c544a7fb6897fb7d86f5f4e31f7ba21fd417 100644
--- a/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java
+++ b/src/main/java/io/papermc/paper/chunk/PlayerChunkLoader.java
@@ -718,7 +718,7 @@ public final class PlayerChunkLoader {
this.onChunkSendReady(queuedLoad.chunkX, queuedLoad.chunkZ);
} else if (this.chunkNeedsPostProcessing(queuedLoad.chunkX, queuedLoad.chunkZ)) {
// requires post processing
- this.chunkMap.mainThreadExecutor.execute(() -> {
+ this.chunkMap.mainThreadExecutor.execute(queuedLoad.chunkX, queuedLoad.chunkZ, () -> { // Gale - base thread pool - chunk-sorted cache tasks
final long key = CoordinateUtils.getChunkKey(queuedLoad.chunkX, queuedLoad.chunkZ);
final ChunkHolder holder = PlayerChunkLoader.this.chunkMap.getVisibleChunkIfPresent(key);
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index baa6aaa495c2a9d4d2f6a62527881b9442fcaeea..cb9d6b5b787ee7543d3fbe625ff4418c827f11f8 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -1,6 +1,7 @@
package net.minecraft.server.level;
import co.aikar.timings.Timing; // Paper
+import com.destroystokyo.paper.util.misc.PooledLinkedHashSets;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableList.Builder;
import com.google.common.collect.Iterables;
@@ -108,6 +109,7 @@ import net.minecraft.world.level.storage.LevelStorageSource;
import net.minecraft.world.phys.Vec3;
import org.apache.commons.lang3.mutable.MutableBoolean;
import org.apache.commons.lang3.mutable.MutableObject;
+import org.galemc.gale.executor.ClosestChunkBlockableEventLoop;
import org.slf4j.Logger;
import org.bukkit.craftbukkit.generator.CustomChunkGenerator;
import org.bukkit.entity.Player;
@@ -131,7 +133,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
// Paper - rewrite chunk system
public final ServerLevel level;
private final ThreadedLevelLightEngine lightEngine;
- public final BlockableEventLoop<Runnable> mainThreadExecutor; // Paper - public
+ public final ClosestChunkBlockableEventLoop<Runnable> mainThreadExecutor; // Paper - public // Gale - base thread pool - chunk-sorted cache tasks
public ChunkGenerator generator;
private final RandomState randomState;
private final ChunkGeneratorStructureState chunkGeneratorState;
@@ -175,7 +177,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
// these maps are named after spigot's uses
public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerMobSpawnMap; // this map is absent from updateMaps since it's controlled at the start of the chunkproviderserver tick
- public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerChunkTickRangeMap;
+ public final com.destroystokyo.paper.util.misc.PlayerDistanceTrackingAreaMap playerChunkTickRangeMap; // Gale - base thread pool - chunk-sorted cache tasks
// Paper end - optimise ChunkMap#anyPlayerCloseEnoughForSpawning
// Paper start - use distance map to optimise tracker
public static boolean isLegacyTrackingEntity(Entity entity) {
@@ -290,7 +292,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
// Paper end
- 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) {
+ public ChunkMap(ServerLevel world, LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, StructureTemplateManager structureTemplateManager, Executor executor, ClosestChunkBlockableEventLoop<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);
// Paper - rewrite chunk system
this.tickingGenerated = new AtomicInteger();
@@ -322,7 +324,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
this.chunkGeneratorState = chunkGenerator.createState(iregistrycustom.lookupOrThrow(Registries.STRUCTURE_SET), this.randomState, j, world.spigotConfig); // Spigot
- this.mainThreadExecutor = mainThreadExecutor;
+ this.mainThreadExecutor = mainThreadExecutor; // Gale - base thread pool
// Paper - rewrite chunk system
Objects.requireNonNull(mainThreadExecutor);
@@ -383,7 +385,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
// Paper end - use distance map to optimise entity tracker
// Paper start - optimise ChunkMap#anyPlayerCloseEnoughForSpawning
- this.playerChunkTickRangeMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
+ this.playerChunkTickRangeMap = new com.destroystokyo.paper.util.misc.PlayerDistanceTrackingAreaMap(this.pooledLinkedPlayerHashSets, // Gale - base thread pool - chunk-sorted cache tasks
(ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
ChunkHolder playerChunk = ChunkMap.this.getUpdatingChunkIfPresent(MCUtil.getCoordinateKey(rangeX, rangeZ));
@@ -397,7 +399,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
if (playerChunk != null) {
playerChunk.playersInChunkTickRange = newState;
}
+ // Gale start - base thread pool - chunk-sorted cache tasks
+ },
+ (int posX, int posZ, int oldNearestDistance, int newNearestDistance, PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> state) -> {
+ this.level.chunkSource.mainThreadProcessor.onChunkDistanceChange(posX, posZ, newNearestDistance);
});
+ // Gale end - base thread pool - chunk-sorted cache tasks
this.playerMobSpawnMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
(ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
@@ -693,7 +700,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
}
protected void releaseLightTicket(ChunkPos pos) {
- this.mainThreadExecutor.tell(Util.name(() -> {
+ this.mainThreadExecutor.tell(pos.x, pos.z, Util.name(() -> { // Gale - base thread pool - chunk-sorted cache tasks
this.distanceManager.removeTicket(TicketType.LIGHT, pos, 33 + ChunkStatus.getDistance(ChunkStatus.LIGHT), pos);
}, () -> {
return "release light ticket " + pos;
diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index 83a57b9bc59063ed8299f98bc33e14b57f2ea0de..9ee931a6442d3f18a7521704f39297af0d7af6d7 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -2,16 +2,12 @@ package net.minecraft.server.level;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
+import com.google.common.collect.Queues;
import com.mojang.datafixers.DataFixer;
import com.mojang.datafixers.util.Either;
import java.io.File;
import java.io.IOException;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Objects;
-import java.util.Optional;
+import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import java.util.function.BooleanSupplier;
@@ -22,6 +18,7 @@ import net.minecraft.Util;
import net.minecraft.core.BlockPos;
import net.minecraft.core.SectionPos;
import net.minecraft.network.protocol.Packet;
+import net.minecraft.server.MinecraftServer;
import net.minecraft.server.level.progress.ChunkProgressListener;
import net.minecraft.util.VisibleForDebug;
import net.minecraft.util.thread.BlockableEventLoop;
@@ -48,6 +45,7 @@ import net.minecraft.world.level.storage.DimensionDataStorage;
import net.minecraft.world.level.storage.LevelData;
import net.minecraft.world.level.storage.LevelStorageSource;
import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet; // Paper
+import org.galemc.gale.executor.ClosestChunkBlockableEventLoop;
import org.galemc.gale.executor.lock.YieldingLock;
import org.galemc.gale.executor.queue.BaseTaskQueues;
import org.galemc.gale.executor.thread.AbstractYieldingThread;
@@ -308,6 +306,7 @@ public class ServerChunkCache extends ChunkSource {
file.mkdirs();
this.dataStorage = new DimensionDataStorage(file, dataFixer);
this.chunkMap = new ChunkMap(world, session, dataFixer, structureTemplateManager, workerExecutor, this.mainThreadProcessor, this, chunkGenerator, worldGenerationProgressListener, chunkStatusChangeListener, persistentStateManagerFactory, viewDistance, dsync);
+ this.mainThreadProcessor.setAreaMap(this.chunkMap.playerChunkTickRangeMap); // Gale - base thread pool - chunk-sorted cache tasks
this.lightEngine = this.chunkMap.getLightEngine();
this.distanceManager = this.chunkMap.getDistanceManager();
this.distanceManager.updateSimulationDistance(simulationDistance);
@@ -422,7 +421,7 @@ public class ServerChunkCache extends ChunkSource {
if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system
return (ChunkAccess) CompletableFuture.supplyAsync(() -> {
return this.getChunk(x, z, leastStatus, create);
- }, this.mainThreadProcessor).join();
+ }, this.mainThreadProcessor.createExecutorForChunk(x, z)).join(); // Gale - base thread pool - chunk-sorted cache tasks
} else {
// Paper start - optimise for loaded chunks
LevelChunk ifLoaded = this.getChunkAtIfLoadedMainThread(x, z);
@@ -446,7 +445,7 @@ public class ServerChunkCache extends ChunkSource {
// Paper end
com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x1, z1); // Paper - sync load info
this.level.timings.syncChunkLoad.startTiming(); // Paper
- chunkproviderserver_b.managedBlock(completablefuture::isDone);
+ chunkproviderserver_b.managedYield(completablefuture); // Gale - base thread pool
io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - async chunk debug // Paper - rewrite chunk system
this.level.timings.syncChunkLoad.stopTiming(); // Paper
} // Paper
@@ -489,11 +488,11 @@ public class ServerChunkCache extends ChunkSource {
ServerChunkCache.MainThreadExecutor chunkproviderserver_b = this.mainThreadProcessor;
Objects.requireNonNull(completablefuture);
- chunkproviderserver_b.managedBlock(completablefuture::isDone);
+ chunkproviderserver_b.managedYield(completablefuture); // Gale - base thread pool
} else {
completablefuture = CompletableFuture.supplyAsync(() -> {
return this.getChunkFutureMainThread(chunkX, chunkZ, leastStatus, create);
- }, this.mainThreadProcessor).thenCompose((completablefuture1) -> {
+ }, this.mainThreadProcessor.createExecutorForChunk(chunkX, chunkZ)).thenCompose((completablefuture1) -> { // Gale - base thread pool - chunk-sorted cache tasks
return completablefuture1;
});
}
@@ -885,7 +884,7 @@ public class ServerChunkCache extends ChunkSource {
@Override
public void onLightUpdate(LightLayer type, SectionPos pos) {
- this.mainThreadProcessor.execute(() -> {
+ this.mainThreadProcessor.execute(pos.x(), pos.z(), () -> { // Gale - base thread pool - chunk-sorted cache tasks
ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos.chunk().toLong());
if (playerchunk != null) {
@@ -971,7 +970,16 @@ public class ServerChunkCache extends ChunkSource {
this.distanceManager.removeTicketsOnClosing();
}
- public final class MainThreadExecutor extends BlockableEventLoop<Runnable> {
+ // Gale start - base thread pool
+ public final class MainThreadExecutor extends ClosestChunkBlockableEventLoop<Runnable> { // Gale - base thread pool - chunk-sorted cache tasks
+
+ /**
+ * The time interval for the server thread to yield when this executor is performing
+ * a {@link #managedYield} but failed to perform any other tasks from this executor itself.
+ */
+ private static final long MANAGED_YIELD_TIMEOUT_TIME = 50_000L;
+ private static @Nullable YieldingLock yieldingLockToNotifyForNewChunkCacheTasks;
+ // Gale end - base thread pool
MainThreadExecutor(Level world) {
super("Chunk source main thread executor for " + world.dimension().location());
@@ -1002,6 +1010,40 @@ public class ServerChunkCache extends ChunkSource {
super.doRunTask(task);
}
+ // Gale start - base thread pool
+ @Override
+ public void tell(int chunkX, int chunkZ, Runnable runnable) {
+ super.tell(chunkX, chunkZ, runnable);
+ MinecraftServer.nextTimeAssumeWeMayHaveDelayedTasks = true;
+ BaseTaskQueues.allLevelsScheduledChunkCache.newTaskWasAdded();
+ if (yieldingLockToNotifyForNewChunkCacheTasks != null) {
+ yieldingLockToNotifyForNewChunkCacheTasks.unlock();
+ }
+ }
+
+ public void managedBlock(BooleanSupplier stopCondition) {
+ throw new UnsupportedOperationException("Cannot call " + this.getClass().getName() + ".managedBlock(BooleanSupplier), call managedYield(CompletableFuture) instead");
+ }
+
+ public void managedYield(CompletableFuture<?> future) {
+ if (!future.isDone()) {
+ ++this.blockingCount;
+ try {
+ var currentThread = AbstractYieldingThread.currentYieldingThread();
+ while (!future.isDone()) {
+ if (!this.pollTask()) {
+ long timeoutTime = System.nanoTime() + MANAGED_YIELD_TIMEOUT_TIME;
+ currentThread.yieldUntilFuture(timeoutTime, () -> this.hasPendingTasks(), future, autoCompletingLock -> yieldingLockToNotifyForNewChunkCacheTasks = autoCompletingLock);
+ }
+ }
+ yieldingLockToNotifyForNewChunkCacheTasks = null;
+ } finally {
+ --this.blockingCount;
+ }
+ }
+ }
+ // Gale end - base thread pool
+
@Override
// CraftBukkit start - process pending Chunk loadCallback() and unloadCallback() after each run task
public boolean pollTask() {
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index e7747b19685fd943d7fbefbfef656f8bb7c359f1..347e231b38d20e049dbb58bbd48a93baa799790c 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -277,7 +277,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
public final void loadChunksForMoveAsync(AABB axisalignedbb, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority,
java.util.function.Consumer<List<net.minecraft.world.level.chunk.ChunkAccess>> onLoad) {
if (Thread.currentThread() != this.thread) {
- this.getChunkSource().mainThreadProcessor.execute(() -> {
+ this.getChunkSource().mainThreadProcessor.execute(Mth.floor((axisalignedbb.minX + axisalignedbb.maxX) / 2.0) >> 4, Mth.floor((axisalignedbb.minZ + axisalignedbb.maxZ) / 2.0) >> 4, () -> { // Gale - base thread pool - chunk-sorted cache tasks
this.loadChunksForMoveAsync(axisalignedbb, priority, onLoad);
});
return;
diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
index 660693c6dc0ef86f4013df980b6d0c11c03e46cd..236cc920a5943abb249d50a6957d6418fd941501 100644
--- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
+++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
@@ -98,7 +98,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
this.chunkMap.level.chunkTaskScheduler.lightExecutor.queueRunnable(() -> { // Paper - rewrite chunk system
this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> {
chunkLightCallback.accept(chunkPos);
- ((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> {
+ (((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(chunkPos.x, chunkPos.z, () -> { // Gale - base thread pool - chunk-sorted cache tasks
((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().chunkMap.getUpdatingChunkIfPresent(chunkPos.toLong()).broadcast(new net.minecraft.network.protocol.game.ClientboundLightUpdatePacket(chunkPos, ThreadedLevelLightEngine.this, null, null, true), false);
((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().removeTicketAtLevel(TicketType.CHUNK_RELIGHT, chunkPos, io.papermc.paper.util.MCUtil.getTicketLevelFor(ChunkStatus.LIGHT), ticketIds.get(chunkPos));
});
@@ -130,7 +130,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
if (!world.getChunkSource().chunkMap.mainThreadExecutor.isSameThread()) {
// ticket logic is not safe to run off-main, re-schedule
- world.getChunkSource().chunkMap.mainThreadExecutor.execute(() -> {
+ world.getChunkSource().chunkMap.mainThreadExecutor.execute(chunkX, chunkZ, () -> { // Gale - base thread pool - chunk-sorted cache tasks
this.queueTaskForSection(chunkX, chunkY, chunkZ, runnable);
});
return;
@@ -160,7 +160,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
} else {
this.chunksBeingWorkedOn.put(key, newReferences - 1);
}
- }, world.getChunkSource().chunkMap.mainThreadExecutor).whenComplete((final Void ignore, final Throwable thr) -> {
+ }, world.getChunkSource().chunkMap.mainThreadExecutor.createExecutorForChunk(chunkX, chunkZ)).whenComplete((final Void ignore, final Throwable thr) -> { // Gale - base thread pool - chunk-sorted cache tasks
if (thr != null) {
LOGGER.error("Failed to remove ticket level for post chunk task " + new ChunkPos(chunkX, chunkZ), thr);
}
diff --git a/src/main/java/net/minecraft/util/thread/BlockableEventLoop.java b/src/main/java/net/minecraft/util/thread/BlockableEventLoop.java
index 392e7b4a89669f16b32043b65b69e6593d17f10e..c2378d66bbd65f786a942eba74dd374b551bcbe8 100644
--- a/src/main/java/net/minecraft/util/thread/BlockableEventLoop.java
+++ b/src/main/java/net/minecraft/util/thread/BlockableEventLoop.java
@@ -21,7 +21,7 @@ public abstract class BlockableEventLoop<R extends Runnable> implements Profiler
private final String name;
private static final Logger LOGGER = LogUtils.getLogger();
private final Queue<R> pendingRunnables = Queues.newConcurrentLinkedQueue();
- private int blockingCount;
+ protected int blockingCount; // Gale - base thread pool
protected BlockableEventLoop(String name) {
this.name = name;
@@ -62,7 +62,7 @@ public abstract class BlockableEventLoop<R extends Runnable> implements Profiler
return this.scheduleExecutables() ? CompletableFuture.supplyAsync(task, this) : CompletableFuture.completedFuture(task.get());
}
- private CompletableFuture<Void> submitAsync(Runnable runnable) {
+ protected CompletableFuture<Void> submitAsync(Runnable runnable) { // Gale - base thread pool - private -> protected
return CompletableFuture.supplyAsync(() -> {
runnable.run();
return null;
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index bca581f2a192015f5461e5bf776234687e5ae9fc..b488cad0d22be10bfeff853ee56e09d458ae8343 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -203,7 +203,7 @@ public class LevelChunk extends ChunkAccess {
if (!areNeighboursLoaded(bitsetBefore, 2) && areNeighboursLoaded(bitsetAfter, 2)) {
if (chunkMap.playerChunkManager.tickMap.getObjectsInRange(this.coordinateKey) != null) { // Paper - replace old player chunk loading system
// now we're ready for entity ticking
- chunkProviderServer.mainThreadProcessor.execute(() -> {
+ chunkProviderServer.mainThreadProcessor.execute(this.chunkPos.x, this.chunkPos.z, () -> { // Gale - base thread pool - chunk-sorted cache tasks
// double check that this condition still holds.
if (LevelChunk.this.areNeighboursLoaded(2) && chunkMap.playerChunkManager.tickMap.getObjectsInRange(LevelChunk.this.coordinateKey) != null) { // Paper - replace old player chunk loading system
chunkMap.playerChunkManager.onChunkPlayerTickReady(this.chunkPos.x, this.chunkPos.z); // Paper - replace old player chunk
@@ -219,7 +219,7 @@ public class LevelChunk extends ChunkAccess {
if (chunkMap.playerChunkManager.isChunkNearPlayers(this.chunkPos.x, this.chunkPos.z)) {
// the post processing is expensive, so we don't want to run it unless we're actually near
// a player.
- chunkProviderServer.mainThreadProcessor.execute(() -> {
+ chunkProviderServer.mainThreadProcessor.execute(this.chunkPos.x, this.chunkPos.z, () -> { // Gale - base thread pool - chunk-sorted cache tasks
if (!LevelChunk.this.areNeighboursLoaded(1)) {
return;
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 949feba1264bcafb8dc2dcecd0a566fea80a2ba0..628c33ee1693c9c7f441ab4c8881c50acb50cb9f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -362,7 +362,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
if (!Bukkit.isPrimaryThread()) {
return java.util.concurrent.CompletableFuture.supplyAsync(() -> {
return CraftWorld.this.isChunkGenerated(x, z);
- }, world.getChunkSource().mainThreadProcessor).join();
+ }, world.getChunkSource().mainThreadProcessor.createExecutorForChunk(x, z)).join(); // Gale - base thread pool - chunk-sorted cache tasks
}
ChunkAccess chunk = world.getChunkSource().getChunkAtImmediately(x, z);
if (chunk == null) {
@@ -470,7 +470,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
list,
true
);
- serverChunkCache.mainThreadProcessor.managedBlock(future::isDone);
+ serverChunkCache.mainThreadProcessor.managedYield(future); // Gale - base thread pool
if (chunkStatus == ChunkStatus.NOISE) {
future.join().left().ifPresent(chunk -> net.minecraft.world.level.levelgen.Heightmap.primeHeightmaps(chunk, ChunkStatus.POST_FEATURES));
}
diff --git a/src/main/java/org/galemc/gale/executor/ClosestChunkBlockableEventLoop.java b/src/main/java/org/galemc/gale/executor/ClosestChunkBlockableEventLoop.java
new file mode 100644
index 0000000000000000000000000000000000000000..be593d86d8c7596e0866fbc8dc8e03636fa14399
--- /dev/null
+++ b/src/main/java/org/galemc/gale/executor/ClosestChunkBlockableEventLoop.java
@@ -0,0 +1,369 @@
+// Gale - base thread pool - chunk-sorted cache tasks
+
+package org.galemc.gale.executor;
+
+import com.destroystokyo.paper.util.misc.DistanceTrackingAreaMap;
+import com.destroystokyo.paper.util.misc.PlayerDistanceTrackingAreaMap;
+import io.papermc.paper.util.IntegerUtil;
+import io.papermc.paper.util.MCUtil;
+import it.unimi.dsi.fastutil.longs.*;
+import net.minecraft.util.thread.BlockableEventLoop;
+import org.galemc.gale.concurrent.Mutex;
+import org.galemc.gale.executor.annotation.Access;
+import org.galemc.gale.executor.annotation.Guarded;
+import org.galemc.gale.executor.annotation.YieldFree;
+import org.galemc.gale.executor.annotation.thread.AnyThreadSafe;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.*;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.function.Supplier;
+
+/**
+ * A {@link BlockableEventLoop} for which all tasks relate to a chunk, where the chunks with the smallest
+ * object distance in a given {@link DistanceTrackingAreaMap} have the highest priority (i.e. are executed first).
+ * have the highest priority.
+ *
+ * @author Martijn Muijsers under AGPL-3.0
+ */
+@AnyThreadSafe
+@YieldFree
+public abstract class ClosestChunkBlockableEventLoop<R extends Runnable> extends BlockableEventLoop<R> {
+
+ /**
+ * @return A packing of the chunk key, similar to {@link MCUtil#getCoordinateKey}, but
+ * instead of allocating 32 bits for each coordinate, only 27 bits are used.
+ * Of those 27 bits, 1 bit is used for the sign (1 indicating negative, 0 indicating nonnegative),
+ * and 26 bits for the absolute value, allowing a signed value in the
+ * range [-67108863, 67108863] per coordinate (there are two ways to represent 0, of which only the one
+ * with a nonnegative sign bit (0) is used).
+ * With 2 coordinates, this leaves 10 unused bits at the most significant end,
+ * allowing an extra unsigned 9-bit value in the range [0, 511] to be stored,
+ * and leaving the final (most significant) bit always zero.
+ */
+ private static long getTightlyPackedXZ(final int x, final int z) {
+ return ((z & 0x80000000L) << 22) | ((IntegerUtil.branchlessAbs(z) & 0x03FFFFFFL) << 27) | ((x & 0x80000000L) >> 5) | (IntegerUtil.branchlessAbs(x) & 0x03FFFFFFL);
+ }
+
+ /**
+ * A packed long containing chunk coordinates and a distance. Because the distance is stored in the most
+ * significant bits (and the sign bit of the long is unused), sorting these values in ascending order
+ * always sorts them primarily by their distance in ascending order (and secondarily by their chunk coordinates,
+ * in an order that is irrelevant apart from being deterministic).
+ *
+ * @param tightlyPackedXZ The return value pf {@link #getTightlyPackedXZ(int, int)}.
+ * @param distance A distance in the range [0, 511].
+ * @return The same as {@link #getTightlyPackedXZ(int, int)}, but with the additional distance value
+ * stored in the 9 bits at indices [1..9] (where index 0 indicates the most significant bit)
+ * as an unsigned integer.
+ *
+ * @see #getTightlyPackedXZ(int, int)
+ */
+ private static long getTightlyPackedXZWithDistance(final long tightlyPackedXZ, final int distance) {
+ return tightlyPackedXZ | ((distance & 0x000001FFL) << 54);
+ }
+
+ private static long stripTightlyPackedDistance(final long tightlyPackedXZWithDistance) {
+ return tightlyPackedXZWithDistance & 0x003FFFFFFFFFFFFFL;
+ }
+
+ private static int unpackTightlyPackedX(final long tightlyPackedXZ) {
+ long sign = (tightlyPackedXZ >> 26) & 1L;
+ return (int) (((-sign) ^ (tightlyPackedXZ & 0x03FFFFFFL)) + sign);
+ }
+
+ private static int unpackTightlyPackedZ(final long tightlyPackedXZ) {
+ long sign = (tightlyPackedXZ >> 53) & 1L;
+ return (int) (((-sign) ^ ((tightlyPackedXZ >> 27) & 0x03FFFFFFL)) + sign);
+ }
+
+ private static int unpackTightlyPackedDistance(final long tightlyPackedXZWithDistance) {
+ return (int) (tightlyPackedXZWithDistance >> 54);
+ }
+
+ /**
+ * The {@link DistanceTrackingAreaMap} to get distances from.
+ * This must be set after construction with {@link #setAreaMap}.
+ */
+ private PlayerDistanceTrackingAreaMap areaMap;
+
+ private final Mutex lock = Mutex.create();
+
+ /**
+ * A pool of re-usable task queues.
+ * <br>
+ * This pool is used as a LIFO stack.
+ */
+ @Guarded("#lock")
+ private final ArrayList<Queue<R>> taskQueuePool = new ArrayList<>();
+
+ /**
+ * The last known distance for a chunk, by their {@linkplain #getTightlyPackedXZ(int, int) chunk key}.
+ * <br>
+ * Only contains values for chunks that have tasks.
+ * For other tasks, the default return value of {@link Long2IntMap#get} is -1.
+ */
+ @Guarded("#lock")
+ private final Long2IntMap distancePerChunk = new Long2IntOpenHashMap();
+ {
+ distancePerChunk.defaultReturnValue(-1);
+ }
+
+ /**
+ * The tasks stored for a specific {@linkplain #getTightlyPackedXZ(int, int) chunk key}.
+ * Each chunk has its tasks stored as a FIFO queue.
+ */
+ @Guarded("#lock")
+ private final Long2ObjectMap<Queue<R>> tasksPerChunk = new Long2ObjectOpenHashMap<>();
+
+ /**
+ * The chunks with tasks, stored as a
+ * {@linkplain #getTightlyPackedXZWithDistance(long, int) packed chunk key and distance}
+ * (where the distance is {@linkplain DistanceTrackingAreaMap#getNearestObjectDistance measured}
+ * at the time of adding).
+ */
+ @Guarded("#lock")
+ private final LongAVLTreeSet chunkQueue = new LongAVLTreeSet();
+
+ @Guarded(value = "#lock", fieldAccess = Access.WRITE)
+ private volatile int pendingTaskCount = 0;
+
+ public ClosestChunkBlockableEventLoop(String name) {
+ super(name);
+ }
+
+ public void setAreaMap(PlayerDistanceTrackingAreaMap areaMap) {
+ if (this.areaMap != null) {
+ throw new IllegalStateException("Called " + this.getClass().getName() + ".setAreaMap(areaMap) but it was already called before");
+ }
+ this.areaMap = areaMap;
+ }
+
+ /**
+ * Provisions a task queue, either a recycled queue or a newly created one.
+ * <br>
+ * This method must only be called while {@link #lock} is held.
+ */
+ private Queue<R> provisionTaskQueue() {
+ return this.taskQueuePool.isEmpty() ? new ArrayDeque<>(1) : this.taskQueuePool.remove(this.taskQueuePool.size() - 1);
+ }
+
+ /**
+ * Returns a task queue to the pool.
+ * <br>
+ * This method must only be called while {@link #lock} is held.
+ *
+ * @param queue An already empty task queue.
+ */
+ private void recycleTaskQueue(Queue<R> queue) {
+ this.taskQueuePool.add(queue);
+ }
+
+ public void onChunkDistanceChange(int chunkX, int chunkZ, int newDistance) {
+ /*
+ Make sure the distance is in the range [0, 511].
+ A negative or very high value may indicate the chunk is not within the tracking range of the AreaMap,
+ so those values are replaced by the maximum value that is in range.
+ */
+ int newDistanceWithinRange = newDistance < 0 || newDistance >= 512 ? 511 : newDistance;
+ long packedXZ = getTightlyPackedXZ(chunkX, chunkZ);
+ long newPackedXZWithDistance = getTightlyPackedXZWithDistance(packedXZ, newDistanceWithinRange);
+ try (var ignored = this.lock.withSpinLock()) {
+ int oldDistance = this.distancePerChunk.get(packedXZ);
+ if (oldDistance == -1) {
+ return;
+ }
+ this.distancePerChunk.put(packedXZ, newDistanceWithinRange);
+ long oldPackedXZWithDistance = getTightlyPackedXZWithDistance(packedXZ, oldDistance);
+ this.chunkQueue.remove(oldPackedXZWithDistance);
+ this.chunkQueue.add(newPackedXZWithDistance);
+ }
+ }
+
+ public final Executor createExecutorForChunk(int chunkX, int chunkZ) {
+ return command -> this.execute(chunkX, chunkZ, command);
+ }
+
+ @Override
+ public int getPendingTasksCount() {
+ return this.pendingTaskCount;
+ }
+
+ @Override
+ public boolean hasPendingTasks() {
+ return this.pendingTaskCount > 0;
+ }
+
+ @Override
+ public <V> @NotNull CompletableFuture<V> submit(@NotNull Supplier<V> task) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".submit(Supplier), use submit(int, int, Supplier) instead");
+ }
+
+ /**
+ * @see #submit(Supplier)
+ */
+ public <V> CompletableFuture<V> submit(int chunkX, int chunkZ, Supplier<V> task) {
+ return this.scheduleExecutables() ? CompletableFuture.supplyAsync(task, this.createExecutorForChunk(chunkX, chunkZ)) : CompletableFuture.completedFuture(task.get());
+ }
+
+ @Override
+ protected @NotNull CompletableFuture<Void> submitAsync(@NotNull Runnable runnable) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".submitAsync(Runnable), use submitAsync(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #submitAsync(Runnable)
+ */
+ private CompletableFuture<Void> submitAsync(int chunkX, int chunkZ, Runnable runnable) {
+ return CompletableFuture.supplyAsync(() -> {
+ runnable.run();
+ return null;
+ }, this.createExecutorForChunk(chunkX, chunkZ));
+ }
+
+ @Override
+ public @NotNull CompletableFuture<Void> submit(@NotNull Runnable task) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".submit(Runnable), use submit(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #submit(Runnable)
+ */
+ public CompletableFuture<Void> submit(int chunkX, int chunkZ, Runnable task) {
+ if (this.scheduleExecutables()) {
+ return this.submitAsync(chunkX, chunkZ, task);
+ } else {
+ task.run();
+ return CompletableFuture.completedFuture((Void)null);
+ }
+ }
+
+ public void executeBlocking(@NotNull Runnable runnable) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".executeBlocking(Runnable), use executeBlocking(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #executeBlocking(Runnable)
+ */
+ public void executeBlocking(int chunkX, int chunkZ, Runnable runnable) {
+ if (!this.isSameThread()) {
+ this.submitAsync(chunkX, chunkZ, runnable).join();
+ } else {
+ runnable.run();
+ }
+ }
+
+ @Override
+ public void scheduleOnMain(@NotNull Runnable r0) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".scheduleOnMain(Runnable), use scheduleOnMain(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #scheduleOnMain(Runnable)
+ */
+ public void scheduleOnMain(int chunkX, int chunkZ, Runnable r0) {
+ this.tell(chunkX, chunkZ, this.wrapRunnable(r0));
+ }
+
+ @Override
+ public void tell(@NotNull R runnable) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".tell(R), use tell(int, int, R) instead");
+ }
+
+ /**
+ * Schedules a task related to the chunk with the given chunk coordinates.
+ *
+ * @see #tell(R)
+ */
+ public void tell(int chunkX, int chunkZ, R runnable) {
+ long packedXZ = getTightlyPackedXZ(chunkX, chunkZ);
+ int computedDistance = this.areaMap.getNearestObjectDistance(chunkX, chunkZ);
+ int computedDistanceInRange = computedDistance < 0 || computedDistance >= 512 ? 511 : computedDistance;
+ try (var ignored = this.lock.withSpinLock()) {
+ int distance = this.distancePerChunk.get(packedXZ);
+ if (distance == -1) {
+ distance = computedDistanceInRange;
+ this.distancePerChunk.put(packedXZ, computedDistanceInRange);
+ }
+ long packedXZWithDistance = getTightlyPackedXZWithDistance(packedXZ, distance);
+ this.tasksPerChunk.computeIfAbsent(packedXZ, $ -> this.provisionTaskQueue()).add(runnable);
+ //noinspection NonAtomicOperationOnVolatileField
+ this.pendingTaskCount++;
+ this.chunkQueue.add(packedXZWithDistance);
+ }
+ }
+
+ @Override
+ public void execute(@NotNull Runnable runnable) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".execute(Runnable), use execute(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #execute(Runnable)
+ */
+ public void execute(int chunkX, int chunkZ, Runnable runnable) {
+ if (this.scheduleExecutables()) {
+ this.tell(chunkX, chunkZ, this.wrapRunnable(runnable));
+ } else {
+ runnable.run();
+ }
+ }
+
+ @Override
+ public void executeIfPossible(@NotNull Runnable runnable) {
+ throw new UnsupportedOperationException("Called " + this.getClass().getName() + ".executeIfPossible(Runnable), use executeIfPossible(int, int, Runnable) instead");
+ }
+
+ /**
+ * @see #executeIfPossible(Runnable)
+ */
+ public void executeIfPossible(int chunkX, int chunkZ, Runnable runnable) {
+ this.execute(chunkX, chunkZ, runnable);
+ }
+
+ @Override
+ protected void dropAllTasks() {
+ try (var ignored = this.lock.withSpinLock()) {
+ this.distancePerChunk.clear();
+ this.tasksPerChunk.forEach(($, queue) -> this.recycleTaskQueue(queue));
+ this.tasksPerChunk.clear();
+ this.pendingTaskCount = 0;
+ this.chunkQueue.clear();
+ }
+ }
+
+ @Override
+ public boolean pollTask() {
+ if (this.pendingTaskCount == 0) {
+ return false;
+ }
+ R runnable;
+ try (var ignored = this.lock.withSpinLock()) {
+ if (this.chunkQueue.isEmpty()) {
+ return false;
+ }
+ long packedXZWithDistance = this.chunkQueue.firstLong();
+ long packedXZ = stripTightlyPackedDistance(packedXZWithDistance);
+ Queue<R> tasks = this.tasksPerChunk.get(packedXZ);
+ runnable = tasks.peek();
+ //noinspection DataFlowIssue
+ if (this.blockingCount == 0 && !this.shouldRun(runnable)) {
+ return false;
+ }
+ tasks.poll();
+ if (tasks.isEmpty()) {
+ this.distancePerChunk.remove(packedXZ);
+ this.recycleTaskQueue(tasks);
+ this.tasksPerChunk.remove(packedXZ);
+ this.chunkQueue.remove(packedXZWithDistance);
+ }
+ //noinspection NonAtomicOperationOnVolatileField
+ this.pendingTaskCount--;
+ }
+ //noinspection DataFlowIssue
+ this.doRunTask(runnable);
+ return true;
+ }
+
+}
diff --git a/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledChunkCacheTaskQueue.java b/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledChunkCacheTaskQueue.java
new file mode 100644
index 0000000000000000000000000000000000000000..fe2e06a827555d81a30697f8b08667692a3eeade
--- /dev/null
+++ b/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledChunkCacheTaskQueue.java
@@ -0,0 +1,52 @@
+// Gale - base thread pool
+
+package org.galemc.gale.executor.queue;
+
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerChunkCache;
+import net.minecraft.server.level.ServerLevel;
+import org.galemc.gale.executor.TaskSpan;
+import org.galemc.gale.executor.annotation.thread.AnyThreadSafe;
+import org.galemc.gale.executor.annotation.YieldFree;
+import org.galemc.gale.executor.thread.ServerThread;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * This class provides access to, but does not store, the tasks scheduled to be executed on the main thread,
+ * that are scheduled and normally polled by each world's {@link ServerChunkCache#mainThreadProcessor} in their
+ * respective {@link ServerChunkCache.MainThreadExecutor#managedBlock}. These tasks could normally also be run in the
+ * server's {@link MinecraftServer#managedBlock} if there were no more global scheduled server thread tasks, and as
+ * such we provide access to polling these tasks from a {@link ServerThread}.
+ * <br>
+ * All tasks provided by this queue must be yield-free.
+ *
+ * @author Martijn Muijsers under AGPL-3.0
+ */
+@AnyThreadSafe
+@YieldFree
+public final class AllLevelsScheduledChunkCacheTaskQueue extends AllLevelsScheduledTaskQueue {
+
+ AllLevelsScheduledChunkCacheTaskQueue() {
+ super(TaskSpan.YIELDING, false);
+ }
+
+ @Override
+ public String getName() {
+ return "AllLevelsScheduledChunkCache";
+ }
+
+ @Override
+ protected boolean hasLevelTasks(ServerLevel level) {
+ return level.getChunkSource().mainThreadProcessor.hasPendingTasks();
+ }
+
+ @Override
+ protected @Nullable Runnable pollLevel(ServerLevel level) {
+ var executor = level.getChunkSource().mainThreadProcessor;
+ if (executor.hasPendingTasks()) {
+ return executor::pollTask;
+ }
+ return null;
+ }
+
+}
diff --git a/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledTaskQueue.java b/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledTaskQueue.java
index 657c3663ed54043e7e4e6660d34903ef746fd8e7..c2acd36b3101042f39afe1436836078dcce2100d 100644
--- a/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledTaskQueue.java
+++ b/src/main/java/org/galemc/gale/executor/queue/AllLevelsScheduledTaskQueue.java
@@ -12,7 +12,8 @@ import org.galemc.gale.executor.thread.pool.BaseThreadActivation;
import org.jetbrains.annotations.Nullable;
/**
- * Common implementation for queues with scheduled tasks for all levels.
+ * Common implementation for queues with scheduled tasks for all levels,
+ * such as {@link AllLevelsScheduledChunkCacheTaskQueue}.
* <br>
* All tasks provided by this queue must be yield-free.
*
diff --git a/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueueTier.java b/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueueTier.java
index f4adcdcad96b2748c60aecb8f5c25370ee6e8f5b..8465ce8de44d823aac4784fbc5183b9fc49b2825 100644
--- a/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueueTier.java
+++ b/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueueTier.java
@@ -61,7 +61,8 @@ public enum BaseTaskQueueTier {
SERVER(new AbstractTaskQueue[]{
BaseTaskQueues.deferredToServerThread,
BaseTaskQueues.serverThreadTick,
- BaseTaskQueues.anyTickScheduledServerThread
+ BaseTaskQueues.anyTickScheduledServerThread,
+ BaseTaskQueues.allLevelsScheduledChunkCache
}, MinecraftServer.SERVER_THREAD_PRIORITY),
/**
* A tier for queues that contain tasks that are part of ticking,
diff --git a/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueues.java b/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueues.java
index 92721a51268becb05d708db04e9d6daaa66fb8b2..c608cdfc17e02a37e8f1799af2b26f973a32c839 100644
--- a/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueues.java
+++ b/src/main/java/org/galemc/gale/executor/queue/BaseTaskQueues.java
@@ -90,6 +90,11 @@ public final class BaseTaskQueues {
*/
public static final SimpleTaskQueue tickAssist = SimpleTaskQueue.allSpans("TickAssist");
+ /**
+ * @see AllLevelsScheduledChunkCacheTaskQueue
+ */
+ public static final AllLevelsScheduledChunkCacheTaskQueue allLevelsScheduledChunkCache = new AllLevelsScheduledChunkCacheTaskQueue();
+
/**
* This queue stores the tasks posted to {@link MCUtil#cleanerExecutor}.
*/
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