From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf Date: Sat, 15 Jun 2019 08:54:33 -0700 Subject: [PATCH] Fix World#isChunkGenerated calls Optimize World#loadChunk() too This patch also adds a chunk status cache on region files (note that its only purpose is to cache the status on DISK) diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java index d6ecee1db17cb9eaeffa94b3d8dd150238fdefe5..1d2d4d38ff3414896d07f7f4e40d0edb9a8c3993 100644 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java @@ -735,9 +735,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider // Paper end private CompletableFuture> readChunk(ChunkPos chunkPos) { - return this.read(chunkPos).thenApplyAsync((optional) -> { - return optional.map((nbttagcompound) -> this.upgradeChunkTag(nbttagcompound, chunkPos)); // CraftBukkit - }, Util.backgroundExecutor()); + // Paper start - Cache chunk status on disk + try { + return CompletableFuture.completedFuture(Optional.ofNullable(this.readConvertChunkSync(chunkPos))); + } catch (Throwable thr) { + return CompletableFuture.failedFuture(thr); + } + // Paper end - Cache chunk status on disk } // CraftBukkit start @@ -746,6 +750,60 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider // CraftBukkit end } + // Paper start - Cache chunk status on disk + @Nullable + public CompoundTag readConvertChunkSync(ChunkPos pos) throws IOException { + CompoundTag nbttagcompound = this.readSync(pos); + if (nbttagcompound == null) { + return null; + } + + nbttagcompound = this.upgradeChunkTag(nbttagcompound, pos); // CraftBukkit + if (nbttagcompound == null) { + return null; + } + + this.updateChunkStatusOnDisk(pos, nbttagcompound); + + return nbttagcompound; + } + + public ChunkStatus getChunkStatusOnDiskIfCached(ChunkPos chunkPos) { + net.minecraft.world.level.chunk.storage.RegionFile regionFile = regionFileCache.getRegionFileIfLoaded(chunkPos); + + return regionFile == null ? null : regionFile.getStatusIfCached(chunkPos.x, chunkPos.z); + } + + public ChunkStatus getChunkStatusOnDisk(ChunkPos chunkPos) throws IOException { + net.minecraft.world.level.chunk.storage.RegionFile regionFile = regionFileCache.getRegionFile(chunkPos, true); + + if (regionFile == null || !regionFileCache.chunkExists(chunkPos)) { + return null; + } + + ChunkStatus status = regionFile.getStatusIfCached(chunkPos.x, chunkPos.z); + + if (status != null) { + return status; + } + + this.readChunk(chunkPos); + + return regionFile.getStatusIfCached(chunkPos.x, chunkPos.z); + } + + public void updateChunkStatusOnDisk(ChunkPos chunkPos, @Nullable CompoundTag compound) throws IOException { + net.minecraft.world.level.chunk.storage.RegionFile regionFile = regionFileCache.getRegionFile(chunkPos, false); + + regionFile.setStatus(chunkPos.x, chunkPos.z, ChunkSerializer.getStatus(compound)); + } + + public ChunkAccess getUnloadingChunk(int chunkX, int chunkZ) { + ChunkHolder chunkHolder = io.papermc.paper.chunk.system.ChunkSystem.getUnloadingChunkHolder(this.level, chunkX, chunkZ); + return chunkHolder == null ? null : chunkHolder.getAvailableChunkNow(); + } + // Paper end - Cache chunk status on disk + public boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) { // Paper - public // Spigot start return this.anyPlayerCloseEnoughForSpawning(pos, false); diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java index f994f91dd4b4a0a6d540a5605af0b6623e229f84..cf43daa019b239464401784938d01af83f9da47c 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java @@ -52,6 +52,29 @@ public class RegionFile implements AutoCloseable { @VisibleForTesting protected final RegionBitmap usedSectors; public final java.util.concurrent.locks.ReentrantLock fileLock = new java.util.concurrent.locks.ReentrantLock(); // Paper + // Paper start - Cache chunk status + private final net.minecraft.world.level.chunk.status.ChunkStatus[] statuses = new net.minecraft.world.level.chunk.status.ChunkStatus[32 * 32]; + + private boolean closed; + + // invoked on write/read + public void setStatus(int x, int z, net.minecraft.world.level.chunk.status.ChunkStatus status) { + if (this.closed) { + // We've used an invalid region file. + throw new IllegalStateException("RegionFile is closed"); + } + this.statuses[getChunkLocation(x, z)] = status; + } + + public net.minecraft.world.level.chunk.status.ChunkStatus getStatusIfCached(int x, int z) { + if (this.closed) { + // We've used an invalid region file. + throw new IllegalStateException("RegionFile is closed"); + } + final int location = getChunkLocation(x, z); + return this.statuses[location]; + } + // Paper end - Cache chunk status public RegionFile(RegionStorageInfo storageKey, Path directory, Path path, boolean dsync) throws IOException { this(storageKey, directory, path, RegionFileVersion.getCompressionFormat(), dsync); // Paper - Configurable region compression format @@ -417,6 +440,7 @@ public class RegionFile implements AutoCloseable { return this.getOffset(pos) != 0; } + private static int getChunkLocation(int x, int z) { return (x & 31) + (z & 31) * 32; } // Paper - Cache chunk status; OBFHELPER - sort of, mirror of logic below private static int getOffsetIndex(ChunkPos pos) { return pos.getRegionLocalX() + pos.getRegionLocalZ() * 32; } @@ -427,6 +451,7 @@ public class RegionFile implements AutoCloseable { synchronized (this) { try { // Paper end + this.closed = true; // Paper - Cache chunk status try { this.padToFullSector(); } finally { diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java index c2838ae91b7f078369b63503df57a1eb5d2b0df5..c33640859aab837c85f3e860fe2241a0e78bb09a 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java @@ -268,6 +268,7 @@ public class RegionFileStorage implements AutoCloseable { try { NbtIo.write(nbt, (DataOutput) dataoutputstream); + regionfile.setStatus(pos.x, pos.z, ChunkSerializer.getStatus(nbt)); // Paper - Cache chunk status regionfile.setOversized(pos.x, pos.z, false); // Paper - We don't do this anymore, mojang stores differently, but clear old meta flag if it exists to get rid of our own meta file once last oversized is gone // Paper start - don't write garbage data to disk if writing serialization fails dataoutputstream.close(); // Only write if successful diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java index 01fc74e6cc8ea8808b821583afb26309587dc003..0ce0589204a01051aa1251d6af752eed4ac69c0f 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java @@ -391,9 +391,23 @@ public class CraftWorld extends CraftRegionAccessor implements World { @Override public boolean isChunkGenerated(int x, int z) { + // Paper start - Fix this method + if (!Bukkit.isPrimaryThread()) { + return java.util.concurrent.CompletableFuture.supplyAsync(() -> { + return CraftWorld.this.isChunkGenerated(x, z); + }, world.getChunkSource().mainThreadProcessor).join(); + } + ChunkAccess chunk = world.getChunkSource().getChunkAtImmediately(x, z); + if (chunk == null) { + chunk = world.getChunkSource().chunkMap.getUnloadingChunk(x, z); + } + if (chunk != null) { + return chunk instanceof ImposterProtoChunk || chunk instanceof net.minecraft.world.level.chunk.LevelChunk; + } try { - return this.isChunkLoaded(x, z) || this.world.getChunkSource().chunkMap.read(new ChunkPos(x, z)).get().isPresent(); - } catch (InterruptedException | ExecutionException ex) { + return world.getChunkSource().chunkMap.getChunkStatusOnDisk(new ChunkPos(x, z)) == ChunkStatus.FULL; + } catch (java.io.IOException ex) { + // Paper end - Fix this method throw new RuntimeException(ex); } } @@ -547,20 +561,48 @@ public class CraftWorld extends CraftRegionAccessor implements World { public boolean loadChunk(int x, int z, boolean generate) { org.spigotmc.AsyncCatcher.catchOp("chunk load"); // Spigot warnUnsafeChunk("loading a faraway chunk", x, z); // Paper - ChunkAccess chunk = this.world.getChunkSource().getChunk(x, z, generate || isChunkGenerated(x, z) ? ChunkStatus.FULL : ChunkStatus.EMPTY, true); // Paper - - // If generate = false, but the chunk already exists, we will get this back. - if (chunk instanceof ImposterProtoChunk) { - // We then cycle through again to get the full chunk immediately, rather than after the ticket addition - chunk = this.world.getChunkSource().getChunk(x, z, ChunkStatus.FULL, true); - } - - if (chunk instanceof net.minecraft.world.level.chunk.LevelChunk) { - this.world.getChunkSource().addRegionTicket(TicketType.PLUGIN, new ChunkPos(x, z), 0, Unit.INSTANCE); // Paper + // Paper start - Optimize this method + ChunkPos chunkPos = new ChunkPos(x, z); + ChunkAccess immediate = world.getChunkSource().getChunkAtIfLoadedImmediately(x, z); + if (immediate != null) { + // Plugins should use plugin tickets instead of this method to keep a chunk perpetually loaded return true; } - return false; + if (!generate) { + immediate = world.getChunkSource().chunkMap.getUnloadingChunk(x, z); + if (immediate != null) { + if (!(immediate instanceof ImposterProtoChunk) && !(immediate instanceof net.minecraft.world.level.chunk.LevelChunk)) { + return false; // not full status + } + world.getChunkSource().addRegionTicket(TicketType.PLUGIN, chunkPos, 0, Unit.INSTANCE); // Paper + world.getChunk(x, z); // make sure we're at ticket level 32 or lower + return true; + } + net.minecraft.world.level.chunk.storage.RegionFile file; + try { + file = world.getChunkSource().chunkMap.regionFileCache.getRegionFile(chunkPos, false); + } catch (java.io.IOException ex) { + throw new RuntimeException(ex); + } + + ChunkStatus status = file.getStatusIfCached(x, z); + if (!file.hasChunk(chunkPos) || (status != null && status != ChunkStatus.FULL)) { + return false; + } + + ChunkAccess chunk = world.getChunkSource().getChunk(x, z, ChunkStatus.EMPTY, true); + if (!(chunk instanceof ImposterProtoChunk) && !(chunk instanceof net.minecraft.world.level.chunk.LevelChunk)) { + return false; + } + + // fall through to load + // we do this so we do not re-read the chunk data on disk + } + world.getChunkSource().addRegionTicket(TicketType.PLUGIN, chunkPos, 0, Unit.INSTANCE); // Paper + world.getChunkSource().getChunk(x, z, ChunkStatus.FULL, true); + return true; + // Paper end - Optimize this method } @Override