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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.
50 lines
2.8 KiB
Diff
50 lines
2.8 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: Mon, 8 Jul 2019 00:13:36 -0700
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Subject: [PATCH] Use getChunkIfLoadedImmediately in places
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This prevents us from hitting chunk loads for chunks at or less-than
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ticket level 33 (yes getChunkIfLoaded will actually perform a chunk
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load in that case).
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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 cb4e720d25cd71c4094e476732b519a0a6ff2b27..10abc211d4b5688de95066caccc7486acafd2858 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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@@ -223,7 +223,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
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}
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@Override public LevelChunk getChunkIfLoaded(int x, int z) { // Paper - this was added in world too but keeping here for NMS ABI
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- return this.chunkSource.getChunk(x, z, false);
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+ return this.chunkSource.getChunkAtIfLoadedImmediately(x, z); // Paper
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}
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@Override
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@@ -1476,7 +1476,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
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for (int l1 = j; l1 <= i1; ++l1) {
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for (int i2 = l; i2 <= k1; ++i2) {
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- LevelChunk chunk = this.getChunkSource().getChunkNow(l1, i2);
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+ LevelChunk chunk = (LevelChunk) this.getChunkIfLoadedImmediately(l1, i2); // Paper
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if (chunk != null) {
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for (int j2 = k; j2 <= j1; ++j2) {
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index 15050e9bfbb5c5639a8b225a9beb3834aab4eafb..e30414e1a5e7907c59917c5cd182bca65bc65825 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -199,6 +199,13 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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return (CraftServer) Bukkit.getServer();
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}
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+ // Paper start
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+ @Override
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+ public boolean hasChunk(int chunkX, int chunkZ) {
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+ return this.getChunkIfLoaded(chunkX, chunkZ) != null;
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+ }
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+ // Paper end
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+
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public abstract ResourceKey<LevelStem> getTypeKey();
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protected Level(WritableLevelData worlddatamutable, ResourceKey<Level> resourcekey, Holder<DimensionType> holder, Supplier<ProfilerFiller> supplier, boolean flag, boolean flag1, long i, int j, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider, org.bukkit.World.Environment env, java.util.function.Function<org.spigotmc.SpigotWorldConfig, io.papermc.paper.configuration.WorldConfiguration> paperWorldConfigCreator, java.util.concurrent.Executor executor) { // Paper - Async-Anti-Xray - Pass executor
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