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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
70 lines
3.8 KiB
Diff
70 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 16 Apr 2020 16:13:59 -0700
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Subject: [PATCH] Optimize ServerLevels chunk level checking methods
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These can be hot functions (i.e entity ticking and block ticking),
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so inline where possible, and avoid the abstraction of the
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Either class.
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diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
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index a778b4b5b2413c25c2f0f0efc72ba1d362d89acf..c9ecc7593c299b351308634db44596a76fd0c09b 100644
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--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
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+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
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@@ -2255,19 +2255,22 @@ public class ServerLevel extends Level implements WorldGenLevel {
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}
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private boolean isPositionTickingWithEntitiesLoaded(long chunkPos) {
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- return this.areEntitiesLoaded(chunkPos) && this.chunkSource.isPositionTicking(chunkPos);
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+ // Paper start - optimize is ticking ready type functions
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+ ChunkHolder chunkHolder = this.chunkSource.chunkMap.getVisibleChunkIfPresent(chunkPos);
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+ return chunkHolder != null && this.chunkSource.isPositionTicking(chunkPos) && chunkHolder.isTickingReady() && this.areEntitiesLoaded(chunkPos);
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+ // Paper end
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}
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public boolean isPositionEntityTicking(BlockPos pos) {
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- return this.entityManager.canPositionTick(pos) && this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(ChunkPos.asLong(pos));
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+ return this.entityManager.canPositionTick(ChunkPos.asLong(pos)) && this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(ChunkPos.asLong(pos)); // Paper
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}
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public boolean isNaturalSpawningAllowed(BlockPos pos) {
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- return this.entityManager.canPositionTick(pos);
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+ return this.entityManager.canPositionTick(ChunkPos.asLong(pos)); // Paper
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}
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public boolean isNaturalSpawningAllowed(ChunkPos pos) {
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- return this.entityManager.canPositionTick(pos);
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+ return this.entityManager.canPositionTick(pos.toLong()); // Paper
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}
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private final class EntityCallbacks implements LevelCallback<Entity> {
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diff --git a/src/main/java/net/minecraft/world/level/ChunkPos.java b/src/main/java/net/minecraft/world/level/ChunkPos.java
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index 2d41f619577b41d6420159668bbab70fb6c762eb..ed0b136e99def41d4377f2004477826b3546a145 100644
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--- a/src/main/java/net/minecraft/world/level/ChunkPos.java
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+++ b/src/main/java/net/minecraft/world/level/ChunkPos.java
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@@ -60,7 +60,7 @@ public class ChunkPos {
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}
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public static long asLong(BlockPos pos) {
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- return asLong(SectionPos.blockToSectionCoord(pos.getX()), SectionPos.blockToSectionCoord(pos.getZ()));
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+ return (((long)pos.getX() >> 4) & 4294967295L) | ((((long)pos.getZ() >> 4) & 4294967295L) << 32); // Paper - inline
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}
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public static int getX(long pos) {
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diff --git a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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index 16519a6414f6f6418de40b714555a52631980617..a5dc8e715c86c1e70a9cf3d99c9cd457a6666b70 100644
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--- a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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+++ b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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@@ -395,6 +395,11 @@ public class PersistentEntitySectionManager<T extends EntityAccess> implements A
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public LevelEntityGetter<T> getEntityGetter() {
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return this.entityGetter;
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}
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+ // Paper start
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+ public final boolean canPositionTick(long position) {
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+ return this.chunkVisibility.get(position).isTicking();
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+ }
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+ // Paper end
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public boolean canPositionTick(BlockPos pos) {
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return ((Visibility) this.chunkVisibility.get(ChunkPos.asLong(pos))).isTicking();
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