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Leaf/patches/server/0005-Pufferfish-Optimize-mob-spawning.patch
Dreeam e0765e16ab Updated Upstream (Gale)
2023-08-08 18:54:48 +08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kevin Raneri <kevin.raneri@gmail.com>
Date: Wed, 10 Nov 2021 00:37:03 -0500
Subject: [PATCH] Pufferfish: Optimize mob spawning
Original license: GPL v3
Original project: https://github.com/pufferfish-gg/Pufferfish
This patch aims to reduce the main-thread impact of mob spawning by
offloading as much work as possible to other threads. It is possible for
inconsistencies to come up, but when they happen they never interfere
with the server's operation (they don't produce errors), and side
effects are limited to more or less mobs being spawned in any particular
tick.
It is possible to disable this optimization if it is not required or if
it interferes with any plugins. On servers with thousands of entities,
this can result in performance gains of up to 15%, which is significant
and, in my opinion, worth the low risk of minor mob-spawning-related
inconsistencies.
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 6246949f1f0eea1b8177ebae61cab11d66f642df..3f8f0c991f563a1f4622f4da3e31dc4d33ce40aa 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -298,6 +298,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
public volatile boolean abnormalExit = false; // Paper
public boolean isIteratingOverLevels = false; // Paper
+ public gg.pufferfish.pufferfish.util.AsyncExecutor mobSpawnExecutor = new gg.pufferfish.pufferfish.util.AsyncExecutor("MobSpawning"); // Pufferfish - optimize mob spawning
public static <S extends MinecraftServer> S spin(Function<Thread, S> serverFactory) {
AtomicReference<S> atomicreference = new AtomicReference();
Thread thread = new io.papermc.paper.util.TickThread(() -> { // Paper - rewrite chunk system
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 4ee7ce28263ed1cca7ee98c81404d62ae1128aeb..c332d533dfec69cbb9f41b4b235b1b1b0751f99d 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -342,6 +342,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
DedicatedServer.LOGGER.info("JMX monitoring enabled");
}
+ if (org.dreeam.leaf.LeafConfig.enableAsyncMobSpawning) mobSpawnExecutor.start(); // Pufferfish
return true;
}
}
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 767f27759c3372b80d65f00195fcb49e8215fdf4..1984b29fc2830a6dcc8e443f241f24987c0d0c9d 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -342,7 +342,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
this.dataRegionManager = new io.papermc.paper.chunk.SingleThreadChunkRegionManager(this.level, 2, (1.0 / 3.0), 1, 6, "Data", DataRegionData::new, DataRegionSectionData::new);
this.regionManagers.add(this.dataRegionManager);
// Paper end
- this.playerMobDistanceMap = this.level.paperConfig().entities.spawning.perPlayerMobSpawns ? new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets) : null; // Paper
+ this.playerMobDistanceMap = this.level.paperConfig().entities.spawning.perPlayerMobSpawns ? new gg.pufferfish.pufferfish.util.AsyncPlayerAreaMap(this.pooledLinkedPlayerHashSets) : null; // Paper // Pufferfish
// Paper start - use distance map to optimise entity tracker
this.playerEntityTrackerTrackMaps = new com.destroystokyo.paper.util.misc.PlayerAreaMap[TRACKING_RANGE_TYPES.length];
this.entityTrackerTrackRanges = new int[TRACKING_RANGE_TYPES.length];
diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index 3c9ff57cf8cf7e7bfca234e460ff869165bd40d3..259727ca7956416afa0f425fc203103654673cef 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -75,6 +75,9 @@ public class ServerChunkCache extends ChunkSource {
final it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap<LevelChunk> loadedChunkMap = new it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap<>(8192, 0.5f);
private final LevelChunk[] lastLoadedChunks = new LevelChunk[4 * 4];
+
+ public boolean firstRunSpawnCounts = true; // Pufferfish
+ public final java.util.concurrent.atomic.AtomicBoolean _pufferfish_spawnCountsReady = new java.util.concurrent.atomic.AtomicBoolean(false); // Pufferfish - optimize countmobs
private static int getChunkCacheKey(int x, int z) {
return x & 3 | ((z & 3) << 2);
@@ -553,18 +556,25 @@ public class ServerChunkCache extends ChunkSource {
int l = this.distanceManager.getNaturalSpawnChunkCount();
// Paper start - per player mob spawning
if ((this.spawnFriendlies || this.spawnEnemies) && this.chunkMap.playerMobDistanceMap != null) { // don't count mobs when animals and monsters are disabled
- // re-set mob counts
- for (ServerPlayer player : this.level.players) {
- Arrays.fill(player.mobCounts, 0);
+ // Pufferfish start - moved down when async processing
+ if (!org.dreeam.leaf.LeafConfig.enableAsyncMobSpawning) {
+ // re-set mob counts
+ for (ServerPlayer player : this.level.players) {
+ Arrays.fill(player.mobCounts, 0);
+ }
+ lastSpawnState = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, null, true);
}
- spawnercreature_d = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, null, true);
+ // Pufferfish end
} else {
- spawnercreature_d = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, this.chunkMap.playerMobDistanceMap == null ? new LocalMobCapCalculator(this.chunkMap) : null, false);
+ // Pufferfish start - this is only implemented for per-player mob spawning so this makes everything work if this setting is disabled.
+ lastSpawnState = NaturalSpawner.createState(l, this.level.getAllEntities(), this::getFullChunk, this.chunkMap.playerMobDistanceMap == null ? new LocalMobCapCalculator(this.chunkMap) : null, false);
+ _pufferfish_spawnCountsReady.set(true);
+ // Pufferfish end
}
// Paper end
this.level.timings.countNaturalMobs.stopTiming(); // Paper - timings
- this.lastSpawnState = spawnercreature_d;
+ //this.lastSpawnState = spawnercreature_d; // Pufferfish - this is managed asynchronously
// Gale start - MultiPaper - skip unnecessary mob spawning computations
} else {
spawnercreature_d = null;
@@ -604,8 +614,8 @@ public class ServerChunkCache extends ChunkSource {
if ((true || this.level.isNaturalSpawningAllowed(chunkcoordintpair)) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, false)) { // Paper - optimise anyPlayerCloseEnoughForSpawning // Paper - the chunk is known ticking
chunk1.incrementInhabitedTime(j);
- if (flag2AndHasNaturalSpawn && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning & optimise chunk tick iteration // Gale - MultiPaper - skip unnecessary mob spawning computations
- NaturalSpawner.spawnForChunk(this.level, chunk1, spawnercreature_d, this.spawnFriendlies, this.spawnEnemies, flag1);
+ if (flag2AndHasNaturalSpawn && (!org.dreeam.leaf.LeafConfig.enableAsyncMobSpawning || _pufferfish_spawnCountsReady.get()) && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunkcoordintpair) && this.chunkMap.anyPlayerCloseEnoughForSpawning(holder, chunkcoordintpair, true)) { // Spigot // Paper - optimise anyPlayerCloseEnoughForSpawning & optimise chunk tick iteration // Gale - MultiPaper - skip unnecessary mob spawning computations
+ NaturalSpawner.spawnForChunk(this.level, chunk1, lastSpawnState, this.spawnFriendlies, this.spawnEnemies, flag1);
}
if (true || this.level.shouldTickBlocksAt(chunkcoordintpair.toLong())) { // Paper - the chunk is known ticking
@@ -663,6 +673,29 @@ public class ServerChunkCache extends ChunkSource {
}
// Paper end - controlled flush for entity tracker packets
}
+ // Pufferfish start - optimize mob spawning
+ if (org.dreeam.leaf.LeafConfig.enableAsyncMobSpawning) {
+ for (ServerPlayer player : this.level.players) {
+ Arrays.fill(player.mobCounts, 0);
+ }
+ if (firstRunSpawnCounts) {
+ firstRunSpawnCounts = false;
+ _pufferfish_spawnCountsReady.set(true);
+ }
+ if (chunkMap.playerMobDistanceMap != null && _pufferfish_spawnCountsReady.getAndSet(false)) {
+ net.minecraft.server.MinecraftServer.getServer().mobSpawnExecutor.submit(() -> {
+ int mapped = distanceManager.getNaturalSpawnChunkCount();
+ io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator<Entity> objectiterator =
+ level.entityTickList.entities.iterator(io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.ITERATOR_FLAG_SEE_ADDITIONS);
+ gg.pufferfish.pufferfish.util.IterableWrapper<Entity> wrappedIterator =
+ new gg.pufferfish.pufferfish.util.IterableWrapper<>(objectiterator);
+ lastSpawnState = NaturalSpawner.createState(mapped, wrappedIterator, this::getFullChunk, null, true);
+ objectiterator.finishedIterating();
+ _pufferfish_spawnCountsReady.set(true);
+ });
+ }
+ }
+ // Pufferfish end
}
// Gale start - MultiPaper - skip unnecessary mob spawning computations
diff --git a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
index 4cdfc433df67afcd455422e9baf56f167dd712ae..57fcf3910f45ce371ac2e237b277b1034caaac4e 100644
--- a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
+++ b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java
@@ -8,7 +8,7 @@ import javax.annotation.Nullable;
import net.minecraft.world.entity.Entity;
public class EntityTickList {
- private final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<Entity> entities = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(true); // Paper - rewrite this, always keep this updated - why would we EVER tick an entity that's not ticking?
+ public final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<Entity> entities = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(true); // Paper - rewrite this, always keep this updated - why would we EVER tick an entity that's not ticking? // Pufferfish - private->public
private void ensureActiveIsNotIterated() {
// Paper - replace with better logic, do not delay removals
diff --git a/src/main/java/org/dreeam/leaf/LeafConfig.java b/src/main/java/org/dreeam/leaf/LeafConfig.java
index b1fcd3588c22143f9852805a6cea3b6cf6c33a1f..5d161351e7517acf57e98203bab8c9f9ab9d4005 100644
--- a/src/main/java/org/dreeam/leaf/LeafConfig.java
+++ b/src/main/java/org/dreeam/leaf/LeafConfig.java
@@ -163,7 +163,20 @@ public class LeafConfig {
private static void removal() {
}
+ public static boolean enableAsyncMobSpawning = true;
+ public static boolean asyncMobSpawningInitialized;
private static void performance() {
+ boolean asyncMobSpawning = getBoolean("performance.enable-async-mob-spawning", enableAsyncMobSpawning,
+ "Whether or not asynchronous mob spawning should be enabled.",
+ "On servers with many entities, this can improve performance by up to 15%. You must have",
+ "paper's per-player-mob-spawns setting set to true for this to work.",
+ "One quick note - this does not actually spawn mobs async (that would be very unsafe).",
+ "This just offloads some expensive calculations that are required for mob spawning.");
+ // This prevents us from changing the value during a reload.
+ if (!asyncMobSpawningInitialized) {
+ asyncMobSpawningInitialized = true;
+ enableAsyncMobSpawning = asyncMobSpawning;
+ }
}
private static void network() {
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