From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf Date: Thu, 7 May 2020 05:48:54 -0700 Subject: [PATCH] Optimise chunk tick iteration Use a dedicated list of entity ticking chunks to reduce the cost diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java index fbfbe9adeca7364e6346c887616890bf968f38a1..bd43fbc8a93afa7604aa467392520ed7b30a1d83 100644 --- a/src/main/java/net/minecraft/server/level/ChunkHolder.java +++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java @@ -86,11 +86,21 @@ public class ChunkHolder { long key = net.minecraft.server.MCUtil.getCoordinateKey(this.pos); this.playersInMobSpawnRange = this.chunkMap.playerMobSpawnMap.getObjectsInRange(key); this.playersInChunkTickRange = this.chunkMap.playerChunkTickRangeMap.getObjectsInRange(key); + // Paper start - optimise chunk tick iteration + if (this.needsBroadcastChanges()) { + this.chunkMap.needsChangeBroadcasting.add(this); + } + // Paper end - optimise chunk tick iteration } void onChunkRemove() { this.playersInMobSpawnRange = null; this.playersInChunkTickRange = null; + // Paper start - optimise chunk tick iteration + if (this.needsBroadcastChanges()) { + this.chunkMap.needsChangeBroadcasting.remove(this); + } + // Paper end - optimise chunk tick iteration } // Paper end - optimise anyPlayerCloseEnoughForSpawning long lastAutoSaveTime; // Paper - incremental autosave @@ -246,7 +256,7 @@ public class ChunkHolder { if (i < 0 || i >= this.changedBlocksPerSection.length) return; // CraftBukkit - SPIGOT-6086, SPIGOT-6296 if (this.changedBlocksPerSection[i] == null) { - this.hasChangedSections = true; + this.hasChangedSections = true; this.addToBroadcastMap(); // Paper - optimise chunk tick iteration this.changedBlocksPerSection[i] = new ShortOpenHashSet(); } @@ -266,6 +276,7 @@ public class ChunkHolder { int k = this.lightEngine.getMaxLightSection(); if (y >= j && y <= k) { + this.addToBroadcastMap(); // Paper - optimise chunk tick iteration int l = y - j; if (lightType == LightLayer.SKY) { @@ -279,8 +290,19 @@ public class ChunkHolder { } } + // Paper start - optimise chunk tick iteration + public final boolean needsBroadcastChanges() { + return this.hasChangedSections || !this.skyChangedLightSectionFilter.isEmpty() || !this.blockChangedLightSectionFilter.isEmpty(); + } + + private void addToBroadcastMap() { + org.spigotmc.AsyncCatcher.catchOp("ChunkHolder update"); + this.chunkMap.needsChangeBroadcasting.add(this); + } + // Paper end - optimise chunk tick iteration + public void broadcastChanges(LevelChunk chunk) { - if (this.hasChangedSections || !this.skyChangedLightSectionFilter.isEmpty() || !this.blockChangedLightSectionFilter.isEmpty()) { + if (this.needsBroadcastChanges()) { // Paper - moved into above, other logic needs to call Level world = chunk.getLevel(); int i = 0; diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java index 5d60fa26e9f5d3c9c57a61c509d5b924bbed3281..ef28e0f57ba593265a3eca4d3f21d0b1b51e8740 100644 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java @@ -159,6 +159,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider private final Queue unloadQueue; int viewDistance; public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerMobDistanceMap; // Paper + public final ReferenceOpenHashSet needsChangeBroadcasting = new ReferenceOpenHashSet<>(); // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback() public final CallbackExecutor callbackExecutor = new CallbackExecutor(); diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java index adab778c11ef11cb57418675a98129afb01ec06e..d5eb5a365c8e8cdcd8e9cf54918cc2fb383c6625 100644 --- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java +++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java @@ -46,6 +46,7 @@ import net.minecraft.world.level.levelgen.structure.templatesystem.StructureMana 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 public class ServerChunkCache extends ChunkSource { @@ -994,34 +995,42 @@ public class ServerChunkCache extends ChunkSource { this.lastSpawnState = spawnercreature_d; gameprofilerfiller.popPush("filteringLoadedChunks"); - List list = Lists.newArrayListWithCapacity(l); - Iterator iterator = this.chunkMap.getChunks().iterator(); + // Paper - moved down this.level.timings.chunkTicks.startTiming(); // Paper - while (iterator.hasNext()) { - ChunkHolder playerchunk = (ChunkHolder) iterator.next(); - LevelChunk chunk = playerchunk.getTickingChunk(); - - if (chunk != null) { - list.add(new ServerChunkCache.ChunkAndHolder(chunk, playerchunk)); - } - } + // Paper - moved down gameprofilerfiller.popPush("spawnAndTick"); boolean flag2 = this.level.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING) && !this.level.players().isEmpty(); // CraftBukkit - Collections.shuffle(list); + // Paper - only shuffle if per-player mob spawning is disabled // Paper - moved natural spawn event up - Iterator iterator1 = list.iterator(); + // Paper start - optimise chunk tick iteration + Iterator iterator1; + if (this.level.paperConfig.perPlayerMobSpawns) { + iterator1 = this.entityTickingChunks.iterator(); + } else { + iterator1 = this.entityTickingChunks.unsafeIterator(); + List shuffled = Lists.newArrayListWithCapacity(this.entityTickingChunks.size()); + while (iterator1.hasNext()) { + shuffled.add(iterator1.next()); + } + Collections.shuffle(shuffled); + iterator1 = shuffled.iterator(); + } + try { while (iterator1.hasNext()) { - ServerChunkCache.ChunkAndHolder chunkproviderserver_a = (ServerChunkCache.ChunkAndHolder) iterator1.next(); - LevelChunk chunk1 = chunkproviderserver_a.chunk; + LevelChunk chunk1 = iterator1.next(); + ChunkHolder holder = chunk1.playerChunk; + if (holder != null) { + // Paper - move down + // Paper end - optimise chunk tick iteration ChunkPos chunkcoordintpair = chunk1.getPos(); - if (this.level.isNaturalSpawningAllowed(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(chunkproviderserver_a.holder, chunkcoordintpair, false)) { // Paper - optimise anyPlayerCloseEnoughForSpawning + if (this.level.isNaturalSpawningAllowed(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, false)) { // Paper - optimise anyPlayerCloseEnoughForSpawning chunk1.incrementInhabitedTime(j); - if (flag2 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(chunkproviderserver_a.holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning + if (flag2 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning & optimise chunk tick iteration NaturalSpawner.spawnForChunk(this.level, chunk1, spawnercreature_d, this.spawnFriendlies, this.spawnEnemies, flag1); } @@ -1029,7 +1038,16 @@ public class ServerChunkCache extends ChunkSource { this.level.tickChunk(chunk1, k); } } + // Paper start - optimise chunk tick iteration + } } + + } finally { + if (iterator1 instanceof io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator safeIterator) { + safeIterator.finishedIterating(); + } + } + // Paper end - optimise chunk tick iteration this.level.timings.chunkTicks.stopTiming(); // Paper gameprofilerfiller.popPush("customSpawners"); if (flag2) { @@ -1037,15 +1055,24 @@ public class ServerChunkCache extends ChunkSource { this.level.tickCustomSpawners(this.spawnEnemies, this.spawnFriendlies); } // Paper - timings } - - gameprofilerfiller.popPush("broadcast"); - list.forEach((chunkproviderserver_a1) -> { - this.level.timings.broadcastChunkUpdates.startTiming(); // Paper - timing - chunkproviderserver_a1.holder.broadcastChanges(chunkproviderserver_a1.chunk); - this.level.timings.broadcastChunkUpdates.stopTiming(); // Paper - timing - }); gameprofilerfiller.pop(); + // Paper start - use set of chunks requiring updates, rather than iterating every single one loaded + gameprofilerfiller.popPush("broadcast"); + this.level.timings.broadcastChunkUpdates.startTiming(); // Paper - timing + if (!this.chunkMap.needsChangeBroadcasting.isEmpty()) { + ReferenceOpenHashSet copy = this.chunkMap.needsChangeBroadcasting.clone(); + this.chunkMap.needsChangeBroadcasting.clear(); + for (ChunkHolder holder : copy) { + holder.broadcastChanges(holder.getFullChunkUnchecked()); // LevelChunks are NEVER unloaded + if (holder.needsBroadcastChanges()) { + // I DON'T want to KNOW what DUMB plugins might be doing. + this.chunkMap.needsChangeBroadcasting.add(holder); + } + } + } + this.level.timings.broadcastChunkUpdates.stopTiming(); // Paper - timing gameprofilerfiller.pop(); + // Paper end - use set of chunks requiring updates, rather than iterating every single one loaded this.chunkMap.tick(); } }