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Paper-Old/Spigot-Server-Patches/0503-Optimize-entity-list-iteration-requiring-entities-be.patch
Aikar f37381ea8a
Optimize Network Manager to not need synchronization 
Removes synchronization from sending packets
Makes normal packet sends no longer need to be wrapped and queued like it use to work.
Adds more packet queue immunities on top of keep alive to let the following scenarios go out
without delay:
  - Keep Alive
  - Chat
  - Kick
  - All of the packets during the Player Joined World event

Hoping that latter one helps join timeout issues more too for slow connections.

Removes processing packet queue off of main thread
  - for the few cases where it is allowed, order is not necessary nor
    should it even be happening concurrently in first place (handshaking/login/status)

Ensures packets sent asynchronously are dispatched on main thread

This helps ensure safety for ProtocolLib as packet listeners
are commonly accessing world state. This will allow you to schedule
a packet to be sent async, but itll be dispatched sync for packet
listeners to process.

This should solve some deadlock risks

This may provide a decent performance improvement because thread synchronization incurs a cache reset
so by avoiding ever entering a synchronized block, we get to avoid that, and packet sending is a really
hot activity.
2020-05-06 05:28:47 -04:00

212 Zeilen
11 KiB
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Originalformat Blame Verlauf

From f7902ec0612cd05ad9b4a86652810dd2f8449cb3 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Tue, 5 May 2020 19:49:23 -0700
Subject: [PATCH] Optimize entity list iteration requiring entities be in
loaded chunks
We retain a list of loaded entities specifically for this usage
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 750fb07756f..69bfece7d43 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -801,6 +801,7 @@ public class Chunk implements IChunkAccess {
this.setNeighbourLoaded(0, 0, this);
this.loadedTicketLevel = true;
// Paper end - neighbour cache
+ ((WorldServer)this.world).onChunkLoad(this); // Paper - optimise entity list iteration
org.bukkit.Server server = this.world.getServer();
((WorldServer)this.world).getChunkProvider().addLoadedChunk(this); // Paper
if (server != null) {
@@ -859,6 +860,7 @@ public class Chunk implements IChunkAccess {
this.loadedTicketLevel = false;
this.resetNeighbours();
// Paper end
+ ((WorldServer)this.world).onChunkUnload(this); // Paper - optimise entity list iteration
}
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index b3785775ecd..d9b3aa285a7 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -189,6 +189,25 @@ public class WorldServer extends World {
}
// Paper end - rewrite ticklistserver
+ // Paper start - Optimize entity list iteration requiring entities be in loaded chunks
+ public final com.destroystokyo.paper.util.maplist.EntityList loadedEntities = new com.destroystokyo.paper.util.maplist.EntityList();
+ void onChunkLoad(final Chunk chunk) {
+ final com.destroystokyo.paper.util.maplist.EntityList list = chunk.entities;
+ final Entity[] entities = list.getRawData();
+ for (int i = 0, size = list.size(); i < size; ++i) {
+ this.loadedEntities.add(entities[i]);
+ }
+ }
+
+ void onChunkUnload(final Chunk chunk) {
+ final com.destroystokyo.paper.util.maplist.EntityList list = chunk.entities;
+ final Entity[] entities = list.getRawData();
+ for (int i = 0, size = list.size(); i < size; ++i) {
+ this.loadedEntities.remove(entities[i]);
+ }
+ }
+ // Paper end - Optimize entity list iteration requiring entities be in loaded chunks
+
// Add env and gen to constructor
public WorldServer(MinecraftServer minecraftserver, Executor executor, WorldNBTStorage worldnbtstorage, WorldData worlddata, DimensionManager dimensionmanager, GameProfilerFiller gameprofilerfiller, WorldLoadListener worldloadlistener, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen) {
super(worlddata, dimensionmanager, (world, worldprovider) -> {
@@ -489,14 +508,13 @@ public class WorldServer extends World {
gameprofilerfiller.exitEnter("regular");
this.tickingEntities = true;
- ObjectIterator objectiterator = this.entitiesById.int2ObjectEntrySet().iterator();
+ Iterator<Entity> entityiterator = this.loadedEntities.iterator(); // Paper - use loaded entity list - change var name to compile fail on usage change, we need to hook remove() calls here
org.spigotmc.ActivationRange.activateEntities(this); // Spigot
timings.entityTick.startTiming(); // Spigot
TimingHistory.entityTicks += this.globalEntityList.size(); // Paper
- while (objectiterator.hasNext()) {
- Entry<Entity> entry = (Entry) objectiterator.next();
- Entity entity1 = (Entity) entry.getValue();
+ while (entityiterator.hasNext()) { // Paper - use loaded entity list
+ Entity entity1 = entityiterator.next(); // Paper - use loaded entity list
Entity entity2 = entity1.getVehicle();
/* CraftBukkit start - We prevent spawning in general, so this butchering is not needed
@@ -532,7 +550,7 @@ public class WorldServer extends World {
gameprofilerfiller.enter("remove");
if (entity1.dead) {
this.removeEntityFromChunk(entity1);
- objectiterator.remove();
+ entityiterator.remove(); this.entitiesById.remove(entity1.getId()); // Paper - use loaded entity list
this.unregisterEntity(entity1);
}
@@ -1445,6 +1463,7 @@ public class WorldServer extends World {
if (entity instanceof EntityInsentient) {
this.navigators.remove(((EntityInsentient) entity).getNavigation());
}
+ this.loadedEntities.remove(entity); // Paper - loaded entity list
new com.destroystokyo.paper.event.entity.EntityRemoveFromWorldEvent(entity.getBukkitEntity()).callEvent(); // Paper - fire while valid
entity.valid = false; // CraftBukkit
}
@@ -1514,6 +1533,11 @@ public class WorldServer extends World {
}
// Paper end
entity.shouldBeRemoved = false; // Paper - shouldn't be removed after being re-added
+ // Paper start - loaded entity list
+ if (this.isChunkLoaded(net.minecraft.server.MCUtil.getChunkCoordinate(entity.locX()), net.minecraft.server.MCUtil.getChunkCoordinate(entity.locZ()))) {
+ this.loadedEntities.add(entity);
+ }
+ // Paper end - loaded entity list
new com.destroystokyo.paper.event.entity.EntityAddToWorldEvent(entity.getBukkitEntity()).callEvent(); // Paper - fire while valid
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index ac257d50dea..995f706678f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1110,16 +1110,16 @@ public class CraftWorld implements World {
@Override
public List<Entity> getEntities() {
- List<Entity> list = new ArrayList<Entity>();
+ List<Entity> list = new ArrayList<Entity>(world.loadedEntities.size()); // Paper - optimize this call
- for (Object o : world.entitiesById.values()) {
+ for (Object o : world.loadedEntities) { // Paper - optimize this call
if (o instanceof net.minecraft.server.Entity) {
net.minecraft.server.Entity mcEnt = (net.minecraft.server.Entity) o;
if (mcEnt.shouldBeRemoved) continue; // Paper
Entity bukkitEntity = mcEnt.getBukkitEntity();
// Assuming that bukkitEntity isn't null
- if (bukkitEntity != null && bukkitEntity.isValid()) {
+ if (bukkitEntity != null && CraftEntity.canBeSeenByPlugins(bukkitEntity)) { // Paper - optimize this call
list.add(bukkitEntity);
}
}
@@ -1130,16 +1130,16 @@ public class CraftWorld implements World {
@Override
public List<LivingEntity> getLivingEntities() {
- List<LivingEntity> list = new ArrayList<LivingEntity>();
+ List<LivingEntity> list = new ArrayList<LivingEntity>(world.loadedEntities.size()); // Paper - optimize this call
- for (Object o : world.entitiesById.values()) {
+ for (Object o : world.loadedEntities) { // Paper - optimize this call
if (o instanceof net.minecraft.server.Entity) {
net.minecraft.server.Entity mcEnt = (net.minecraft.server.Entity) o;
if (mcEnt.shouldBeRemoved) continue; // Paper
Entity bukkitEntity = mcEnt.getBukkitEntity();
// Assuming that bukkitEntity isn't null
- if (bukkitEntity != null && bukkitEntity instanceof LivingEntity && bukkitEntity.isValid()) {
+ if (bukkitEntity != null && bukkitEntity instanceof LivingEntity && CraftEntity.canBeSeenByPlugins(bukkitEntity)) { // Paper - optimize this call
list.add((LivingEntity) bukkitEntity);
}
}
@@ -1160,7 +1160,7 @@ public class CraftWorld implements World {
public <T extends Entity> Collection<T> getEntitiesByClass(Class<T> clazz) {
Collection<T> list = new ArrayList<T>();
- for (Object entity: world.entitiesById.values()) {
+ for (Object entity: world.loadedEntities) { // Paper - optimize this call
if (entity instanceof net.minecraft.server.Entity) {
if (((net.minecraft.server.Entity) entity).shouldBeRemoved) continue; // Paper
Entity bukkitEntity = ((net.minecraft.server.Entity) entity).getBukkitEntity();
@@ -1171,7 +1171,7 @@ public class CraftWorld implements World {
Class<?> bukkitClass = bukkitEntity.getClass();
- if (clazz.isAssignableFrom(bukkitClass) && bukkitEntity.isValid()) {
+ if (clazz.isAssignableFrom(bukkitClass) && CraftEntity.canBeSeenByPlugins(bukkitEntity)) { // Paper - optimize this call
list.add((T) bukkitEntity);
}
}
@@ -1184,7 +1184,7 @@ public class CraftWorld implements World {
public Collection<Entity> getEntitiesByClasses(Class<?>... classes) {
Collection<Entity> list = new ArrayList<Entity>();
- for (Object entity: world.entitiesById.values()) {
+ for (Object entity: world.loadedEntities) { // Paper - optimize this call
if (entity instanceof net.minecraft.server.Entity) {
if (((net.minecraft.server.Entity) entity).shouldBeRemoved) continue; // Paper
Entity bukkitEntity = ((net.minecraft.server.Entity) entity).getBukkitEntity();
@@ -1197,7 +1197,7 @@ public class CraftWorld implements World {
for (Class<?> clazz : classes) {
if (clazz.isAssignableFrom(bukkitClass)) {
- if (bukkitEntity.isValid()) {
+ if (CraftEntity.canBeSeenByPlugins(bukkitEntity)) { // Paper - optimize this call
list.add(bukkitEntity);
}
break;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index ff60568ce43..f3771121617 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -180,6 +180,18 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
this.entity = entity;
}
+ // Paper start
+ // note: this does not check isChunkLoaded, use Entity#isValid to do that
+ public static boolean canBeSeenByPlugins(org.bukkit.entity.Entity entity) {
+ Entity handle = ((CraftEntity)entity).getHandle();
+ // TODO
+ // isAlive is a dumb choice, given living entities aren't alive (but are in the world) if health < 0
+ // this needs to be brought up to spigot to fix though, we are NOT breaking api implementation, especially
+ // if no-one's complained.
+ return !handle.shouldBeRemoved && handle.isAlive() && handle.valid;
+ }
+ // Paper end
+
@Override
public Chunk getChunk() {
net.minecraft.server.Chunk currentChunk = entity.getCurrentChunk();
--
2.26.2
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