From c51e28b104b1df742a48f6ad8cbe6e655bd714bb 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/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java index d83eec0d76..459bd619ee 100644 --- a/src/main/java/net/minecraft/server/ChunkProviderServer.java +++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java @@ -29,7 +29,7 @@ public class ChunkProviderServer extends IChunkProvider { private final WorldServer world; private final Thread serverThread; private final LightEngineThreaded lightEngine; - private final ChunkProviderServer.a serverThreadQueue; + public final ChunkProviderServer.a serverThreadQueue; // Paper private -> public public final PlayerChunkMap playerChunkMap; private final WorldPersistentData worldPersistentData; private long lastTickTime; @@ -119,6 +119,36 @@ public class ChunkProviderServer extends IChunkProvider { return playerChunk.getFullChunk(); } + + @Nullable + public IChunkAccess getChunkAtImmediately(int x, int z) { + if (Thread.currentThread() != this.serverThread) { + return CompletableFuture.supplyAsync(() -> { + return this.getChunkAtImmediately(x, z); + }, this.serverThreadQueue).join(); + } + + long k = ChunkCoordIntPair.pair(x, z); + + IChunkAccess ichunkaccess; + + for (int l = 0; l < 4; ++l) { + if (k == this.cachePos[l]) { + ichunkaccess = this.cacheChunk[l]; + if (ichunkaccess != null) { // CraftBukkit - the chunk can become accessible in the meantime TODO for non-null chunks it might also make sense to check that the chunk's state hasn't changed in the meantime + return ichunkaccess; + } + } + } + + PlayerChunk playerChunk = this.getChunk(k); + if (playerChunk == null) { + return null; + } + + return playerChunk.getAvailableChunkNow(); + + } // Paper end @Nullable diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java index 2f749fe26a..4906530d83 100644 --- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java +++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java @@ -409,6 +409,17 @@ public class ChunkRegionLoader { return nbttagcompound; } + // Paper start + public static ChunkStatus getStatus(NBTTagCompound compound) { + if (compound == null) { + return null; + } + + // Note: Copied from below + return ChunkStatus.getStatus(compound.getCompound("Level").getString("Status")); + } + // Paper end + public static ChunkStatus.Type a(@Nullable NBTTagCompound nbttagcompound) { if (nbttagcompound != null) { ChunkStatus chunkstatus = ChunkStatus.a(nbttagcompound.getCompound("Level").getString("Status")); diff --git a/src/main/java/net/minecraft/server/ChunkStatus.java b/src/main/java/net/minecraft/server/ChunkStatus.java index dd1822d6ff..e324989b46 100644 --- a/src/main/java/net/minecraft/server/ChunkStatus.java +++ b/src/main/java/net/minecraft/server/ChunkStatus.java @@ -176,6 +176,7 @@ public class ChunkStatus { return this.s; } + public ChunkStatus getPreviousStatus() { return this.e(); } // Paper - OBFHELPER public ChunkStatus e() { return this.u; } @@ -196,6 +197,17 @@ public class ChunkStatus { return this.y; } + // Paper start + public static ChunkStatus getStatus(String name) { + try { + // We need this otherwise we return EMPTY for invalid names + MinecraftKey key = new MinecraftKey(name); + return IRegistry.CHUNK_STATUS.getOptional(key).orElse(null); + } catch (Exception ex) { + return null; // invalid name + } + } + // Paper end public static ChunkStatus a(String s) { return (ChunkStatus) IRegistry.CHUNK_STATUS.get(MinecraftKey.a(s)); } diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java index 806d225aaa..97040528a0 100644 --- a/src/main/java/net/minecraft/server/PlayerChunk.java +++ b/src/main/java/net/minecraft/server/PlayerChunk.java @@ -70,6 +70,19 @@ public class PlayerChunk { Either either = (Either) statusFuture.getNow(null); return either == null ? null : (Chunk) either.left().orElse(null); } + + public IChunkAccess getAvailableChunkNow() { + // TODO can we just getStatusFuture(EMPTY)? + for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getPreviousStatus(); curr != next; curr = next, next = next.getPreviousStatus()) { + CompletableFuture> future = this.getStatusFutureUnchecked(curr); + Either either = future.getNow(null); + if (either == null || !either.left().isPresent()) { + continue; + } + return either.left().get(); + } + return null; + } // Paper end public CompletableFuture> getStatusFutureUnchecked(ChunkStatus chunkstatus) { diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java index 86831c3526..f4bdb2eda3 100644 --- a/src/main/java/net/minecraft/server/PlayerChunkMap.java +++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java @@ -808,10 +808,23 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d { } @Nullable - private NBTTagCompound readChunkData(ChunkCoordIntPair chunkcoordintpair) throws IOException { + public NBTTagCompound readChunkData(ChunkCoordIntPair chunkcoordintpair) throws IOException { // Paper - private -> public NBTTagCompound nbttagcompound = this.read(chunkcoordintpair); - return nbttagcompound == null ? null : this.getChunkData(this.world.getWorldProvider().getDimensionManager(), this.m, nbttagcompound, chunkcoordintpair, world); // CraftBukkit + // Paper start - Cache chunk status on disk + if (nbttagcompound == null) { + return null; + } + + nbttagcompound = this.getChunkData(this.world.getWorldProvider().getDimensionManager(), this.m, nbttagcompound, chunkcoordintpair, world); // CraftBukkit + if (nbttagcompound == null) { + return null; + } + + this.getRegionFile(chunkcoordintpair, false).setStatus(chunkcoordintpair.x, chunkcoordintpair.z, ChunkRegionLoader.getStatus(nbttagcompound)); + + return nbttagcompound; + // Paper end } // Spigot Start diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java index 2e14d84657..d610253b95 100644 --- a/src/main/java/net/minecraft/server/RegionFile.java +++ b/src/main/java/net/minecraft/server/RegionFile.java @@ -31,6 +31,47 @@ public class RegionFile implements AutoCloseable { private final int[] d = new int[1024];private int[] timestamps = d; // Paper - OBFHELPER private final List e; private List getFreeSectors() { return this.e; } // Paper - OBFHELPER + // Paper start - Cache chunk status + private final ChunkStatus[] statuses = new ChunkStatus[32 * 32]; + + private boolean closed; + + // invoked on write/read + public void setStatus(int x, int z, ChunkStatus status) { + if (this.closed) { + // We've used an invalid region file. + throw new IllegalStateException("RegionFile is closed"); + } + this.statuses[this.getChunkLocation(new ChunkCoordIntPair(x, z))] = status; + } + + public 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 = this.getChunkLocation(new ChunkCoordIntPair(x, z)); + return this.statuses[location]; + } + + public ChunkStatus getStatus(int x, int z, PlayerChunkMap playerChunkMap) throws IOException { + if (this.closed) { + // We've used an invalid region file. + throw new java.io.EOFException("RegionFile is closed"); + } + ChunkCoordIntPair chunkPos = new ChunkCoordIntPair(x, z); + int location = this.getChunkLocation(chunkPos); + ChunkStatus cached = this.statuses[location]; + if (cached != null) { + return cached; + } + + playerChunkMap.readChunkData(chunkPos); // This will set our status (yes it's disgusting) + + return this.statuses[location]; + } + // Paper end + public RegionFile(File file) throws IOException { this.b = new RandomAccessFile(file, "rw"); this.file = file; // Spigot // Paper - We need this earlier @@ -299,6 +340,7 @@ public class RegionFile implements AutoCloseable { this.writeInt(i); // Paper - Avoid 3 io write calls } + private final int getChunkLocation(ChunkCoordIntPair chunkcoordintpair) { return this.f(chunkcoordintpair); } // Paper - OBFHELPER private int f(ChunkCoordIntPair chunkcoordintpair) { return chunkcoordintpair.j() + chunkcoordintpair.k() * 32; } @@ -312,6 +354,7 @@ public class RegionFile implements AutoCloseable { } public void close() throws IOException { + this.closed = true; // Paper this.b.close(); } diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java index 6f34d8aea0..d1323891fa 100644 --- a/src/main/java/net/minecraft/server/RegionFileCache.java +++ b/src/main/java/net/minecraft/server/RegionFileCache.java @@ -110,6 +110,7 @@ public abstract class RegionFileCache implements AutoCloseable { try { NBTCompressedStreamTools.writeNBT(nbttagcompound, out); out.close(); + regionfile.setStatus(chunk.x, chunk.z, ChunkRegionLoader.getStatus(nbttagcompound)); // Paper - cache status on disk regionfile.setOversized(chunkX, chunkZ, false); } catch (RegionFile.ChunkTooLargeException ignored) { printOversizedLog("ChunkTooLarge! Someone is trying to duplicate.", regionfile.file, chunkX, chunkZ); @@ -127,6 +128,7 @@ public abstract class RegionFileCache implements AutoCloseable { if (SIZE_THRESHOLD == OVERZEALOUS_THRESHOLD) { resetFilterThresholds(); } + regionfile.setStatus(chunk.x, chunk.z, ChunkRegionLoader.getStatus(nbttagcompound)); // Paper - cache status on disk } catch (RegionFile.ChunkTooLargeException e) { printOversizedLog("ChunkTooLarge even after reduction. Trying in overzealous mode.", regionfile.file, chunkX, chunkZ); // Eek, major fail. We have retry logic, so reduce threshholds and fall back diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java index 0cdf723480..4026edabc2 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java @@ -387,8 +387,20 @@ public class CraftWorld implements World { @Override public boolean isChunkGenerated(int x, int z) { + // Paper start - Fix this method + if (!Bukkit.isPrimaryThread()) { + return CompletableFuture.supplyAsync(() -> { + return CraftWorld.this.isChunkGenerated(x, z); + }, world.getChunkProvider().serverThreadQueue).join(); + } + IChunkAccess chunk = world.getChunkProvider().getChunkAtImmediately(x, z); + if (chunk != null) { + return chunk instanceof ProtoChunkExtension || chunk instanceof net.minecraft.server.Chunk; + } try { - return world.getChunkProvider().getChunkAtIfCachedImmediately(x, z) != null || world.getChunkProvider().playerChunkMap.chunkExists(new ChunkCoordIntPair(x, z)); // Paper + return world.getChunkProvider().playerChunkMap.getRegionFile(new ChunkCoordIntPair(x, z), false) + .getStatus(x, z, world.getChunkProvider().playerChunkMap) == ChunkStatus.FULL; + // Paper end } catch (IOException ex) { throw new RuntimeException(ex); } @@ -500,20 +512,14 @@ public class CraftWorld implements World { @Override public boolean loadChunk(int x, int z, boolean generate) { org.spigotmc.AsyncCatcher.catchOp( "chunk load"); // Spigot - IChunkAccess chunk = world.getChunkProvider().getChunkAt(x, z, generate || isChunkGenerated(x, z) ? ChunkStatus.FULL : ChunkStatus.EMPTY, true); - - // If generate = false, but the chunk already exists, we will get this back. - if (chunk instanceof ProtoChunkExtension) { - // We then cycle through again to get the full chunk immediately, rather than after the ticket addition - chunk = world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, true); - } - - if (chunk instanceof net.minecraft.server.Chunk) { - world.getChunkProvider().addTicket(TicketType.PLUGIN, new ChunkCoordIntPair(x, z), 1, Unit.INSTANCE); - return true; + // Paper - Optimize this method + if (!generate && !isChunkGenerated(x, z)) { + return false; } - - return false; + world.getChunkProvider().addTicket(TicketType.PLUGIN, new ChunkCoordIntPair(x, z), 1, Unit.INSTANCE); + world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, true); + return true; + // Paper end } @Override @@ -2125,21 +2131,11 @@ public class CraftWorld implements World { // Paper start private Chunk getChunkAtGen(int x, int z, boolean gen) { - // copied from loadChunk() - // this function is identical except we do not add a plugin ticket - IChunkAccess chunk = world.getChunkProvider().getChunkAt(x, z, gen || isChunkGenerated(x, z) ? ChunkStatus.FULL : ChunkStatus.EMPTY, true); - - // If generate = false, but the chunk already exists, we will get this back. - if (chunk instanceof ProtoChunkExtension) { - // We then cycle through again to get the full chunk immediately, rather than after the ticket addition - chunk = world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, true); - } - - if (chunk instanceof net.minecraft.server.Chunk) { - return ((net.minecraft.server.Chunk)chunk).bukkitChunk; + // Note: Copied from loadChunk() + if (!gen && !isChunkGenerated(x, z)) { + return null; } - - return null; + return ((net.minecraft.server.Chunk)world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, true)).bukkitChunk; } @Override -- 2.21.0