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https://github.com/PaperMC/Paper.git
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"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
310 lines
13 KiB
Diff
310 lines
13 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: Fri, 19 Jul 2019 03:29:14 -0700
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Subject: [PATCH] Add debug for sync chunk loads
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This patch adds a tool to find calls to getChunkAt which would load
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chunks, however it must be enabled by setting the startup flag
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-Dpaper.debug-sync-loads=true
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To get a debug log for sync loads, the command is /paper syncloadinfo
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diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
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index 7b5afc5d34b78e6404c1a5c6bb823d9589471f13..de45163023f436d386e90e6ded5e6105ba3ecf35 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
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@@ -1,11 +1,17 @@
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package com.destroystokyo.paper;
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+import com.destroystokyo.paper.io.SyncLoadFinder;
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import com.google.common.base.Functions;
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import com.google.common.base.Joiner;
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import com.google.common.collect.ImmutableSet;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Maps;
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+import com.google.gson.JsonObject;
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+import com.google.gson.internal.Streams;
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+import com.google.gson.stream.JsonWriter;
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+import net.minecraft.resources.ResourceLocation;
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+import net.minecraft.server.MCUtil;
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import net.minecraft.server.MinecraftServer;
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import net.minecraft.server.level.ChunkHolder;
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import net.minecraft.server.level.ServerChunkCache;
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@@ -30,6 +36,9 @@ import org.bukkit.craftbukkit.entity.CraftPlayer;
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import org.bukkit.entity.Player;
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import java.io.File;
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+import java.io.FileOutputStream;
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+import java.io.PrintStream;
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+import java.io.StringWriter;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.ArrayDeque;
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@@ -47,7 +56,7 @@ import java.util.stream.Collectors;
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public class PaperCommand extends Command {
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private static final String BASE_PERM = "bukkit.command.paper.";
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- private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo", "fixlight").build();
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+ private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo", "fixlight", "syncloadinfo").build();
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public PaperCommand(String name) {
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super(name);
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@@ -165,6 +174,9 @@ public class PaperCommand extends Command {
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case "fixlight":
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this.doFixLight(sender, args);
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break;
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+ case "syncloadinfo":
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+ this.doSyncLoadInfo(sender, args);
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+ break;
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case "ver":
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if (!testPermission(sender, "version")) break; // "ver" needs a special check because it's an alias. All other commands are checked up before the switch statement (because they are present in the SUBCOMMANDS set)
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case "version":
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@@ -182,6 +194,40 @@ public class PaperCommand extends Command {
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return true;
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}
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+ private void doSyncLoadInfo(CommandSender sender, String[] args) {
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+ if (!SyncLoadFinder.ENABLED) {
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+ sender.sendMessage(ChatColor.RED + "This command requires the server startup flag '-Dpaper.debug-sync-loads=true' to be set.");
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+ return;
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+ }
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+ File file = new File(new File(new File("."), "debug"),
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+ "sync-load-info" + DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(LocalDateTime.now()) + ".txt");
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+ file.getParentFile().mkdirs();
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+ sender.sendMessage(ChatColor.GREEN + "Writing sync load info to " + file.toString());
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+
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+
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+ try {
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+ final JsonObject data = SyncLoadFinder.serialize();
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+
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+ StringWriter stringWriter = new StringWriter();
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+ JsonWriter jsonWriter = new JsonWriter(stringWriter);
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+ jsonWriter.setIndent(" ");
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+ jsonWriter.setLenient(false);
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+ Streams.write(data, jsonWriter);
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+
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+ String fileData = stringWriter.toString();
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+
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+ try (
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+ PrintStream out = new PrintStream(new FileOutputStream(file), false, "UTF-8")
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+ ) {
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+ out.print(fileData);
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+ }
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+ sender.sendMessage(ChatColor.GREEN + "Successfully written sync load information!");
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+ } catch (Throwable thr) {
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+ sender.sendMessage(ChatColor.RED + "Failed to write sync load information");
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+ thr.printStackTrace();
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+ }
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+ }
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+
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private void doChunkInfo(CommandSender sender, String[] args) {
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List<org.bukkit.World> worlds;
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if (args.length < 2 || args[1].equals("*")) {
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diff --git a/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java b/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..524f33371b9de1d4dd6972fe59ffbe1804d7c5f3
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/io/SyncLoadFinder.java
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@@ -0,0 +1,171 @@
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+package com.destroystokyo.paper.io;
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+
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+import com.google.gson.JsonArray;
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+import com.google.gson.JsonObject;
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+import com.mojang.datafixers.util.Pair;
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+import it.unimi.dsi.fastutil.longs.Long2IntMap;
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+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
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+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
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+
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+import java.util.ArrayList;
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+import java.util.List;
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+import java.util.Map;
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+import java.util.WeakHashMap;
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+import net.minecraft.world.level.Level;
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+
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+public class SyncLoadFinder {
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+
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+ public static final boolean ENABLED = Boolean.getBoolean("paper.debug-sync-loads");
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+
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+ private static final WeakHashMap<Level, Object2ObjectOpenHashMap<ThrowableWithEquals, SyncLoadInformation>> SYNC_LOADS = new WeakHashMap<>();
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+
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+ private static final class SyncLoadInformation {
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+
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+ public int times;
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+
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+ public final Long2IntOpenHashMap coordinateTimes = new Long2IntOpenHashMap();
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+ }
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+
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+ public static void logSyncLoad(final Level world, final int chunkX, final int chunkZ) {
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+ if (!ENABLED) {
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+ return;
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+ }
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+
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+ final ThrowableWithEquals stacktrace = new ThrowableWithEquals(Thread.currentThread().getStackTrace());
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+
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+ SYNC_LOADS.compute(world, (final Level keyInMap, Object2ObjectOpenHashMap<ThrowableWithEquals, SyncLoadInformation> map) -> {
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+ if (map == null) {
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+ map = new Object2ObjectOpenHashMap<>();
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+ }
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+
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+ map.compute(stacktrace, (ThrowableWithEquals keyInMap0, SyncLoadInformation valueInMap) -> {
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+ if (valueInMap == null) {
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+ valueInMap = new SyncLoadInformation();
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+ }
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+
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+ ++valueInMap.times;
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+
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+ valueInMap.coordinateTimes.compute(IOUtil.getCoordinateKey(chunkX, chunkZ), (Long keyInMap1, Integer valueInMap1) -> {
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+ return valueInMap1 == null ? Integer.valueOf(1) : Integer.valueOf(valueInMap1.intValue() + 1);
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+ });
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+
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+ return valueInMap;
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+ });
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+
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+ return map;
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+ });
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+ }
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+
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+ public static JsonObject serialize() {
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+ final JsonObject ret = new JsonObject();
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+
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+ final JsonArray worldsData = new JsonArray();
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+
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+ for (final Map.Entry<Level, Object2ObjectOpenHashMap<ThrowableWithEquals, SyncLoadInformation>> entry : SYNC_LOADS.entrySet()) {
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+ final Level world = entry.getKey();
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+
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+ final JsonObject worldData = new JsonObject();
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+
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+ worldData.addProperty("name", world.getWorld().getName());
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+
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+ final List<Pair<ThrowableWithEquals, SyncLoadInformation>> data = new ArrayList<>();
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+
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+ entry.getValue().forEach((ThrowableWithEquals stacktrace, SyncLoadInformation times) -> {
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+ data.add(new Pair<>(stacktrace, times));
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+ });
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+
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+ data.sort((Pair<ThrowableWithEquals, SyncLoadInformation> pair1, Pair<ThrowableWithEquals, SyncLoadInformation> pair2) -> {
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+ return Integer.compare(pair2.getSecond().times, pair1.getSecond().times); // reverse order
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+ });
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+
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+ final JsonArray stacktraces = new JsonArray();
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+
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+ for (Pair<ThrowableWithEquals, SyncLoadInformation> pair : data) {
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+ final JsonObject stacktrace = new JsonObject();
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+
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+ stacktrace.addProperty("times", pair.getSecond().times);
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+
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+ final JsonArray traces = new JsonArray();
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+
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+ for (StackTraceElement element : pair.getFirst().stacktrace) {
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+ traces.add(String.valueOf(element));
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+ }
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+
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+ stacktrace.add("stacktrace", traces);
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+
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+ final JsonArray coordinates = new JsonArray();
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+
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+ for (Long2IntMap.Entry coordinate : pair.getSecond().coordinateTimes.long2IntEntrySet()) {
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+ final long key = coordinate.getLongKey();
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+ final int times = coordinate.getIntValue();
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+ coordinates.add("(" + IOUtil.getCoordinateX(key) + "," + IOUtil.getCoordinateZ(key) + "): " + times);
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+ }
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+
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+ stacktrace.add("coordinates", coordinates);
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+
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+ stacktraces.add(stacktrace);
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+ }
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+
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+
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+ worldData.add("stacktraces", stacktraces);
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+ worldsData.add(worldData);
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+ }
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+
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+ ret.add("worlds", worldsData);
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+
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+ return ret;
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+ }
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+
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+ static final class ThrowableWithEquals {
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+
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+ private final StackTraceElement[] stacktrace;
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+ private final int hash;
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+
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+ public ThrowableWithEquals(final StackTraceElement[] stacktrace) {
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+ this.stacktrace = stacktrace;
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+ this.hash = ThrowableWithEquals.hash(stacktrace);
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+ }
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+
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+ public static int hash(final StackTraceElement[] stacktrace) {
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+ int hash = 0;
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+
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+ for (int i = 0; i < stacktrace.length; ++i) {
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+ hash *= 31;
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+ hash += stacktrace[i].hashCode();
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+ }
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+
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+ return hash;
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+ }
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+
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+ @Override
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+ public int hashCode() {
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+ return this.hash;
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+ }
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+
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+ @Override
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+ public boolean equals(final Object obj) {
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+ if (obj == null || obj.getClass() != this.getClass()) {
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+ return false;
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+ }
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+
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+ final ThrowableWithEquals other = (ThrowableWithEquals)obj;
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+ final StackTraceElement[] otherStackTrace = other.stacktrace;
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+
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+ if (this.stacktrace.length != otherStackTrace.length || this.hash != other.hash) {
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+ return false;
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+ }
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+
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+ if (this == obj) {
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+ return true;
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+ }
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+
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+ for (int i = 0; i < this.stacktrace.length; ++i) {
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+ if (!this.stacktrace[i].equals(otherStackTrace[i])) {
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+ return false;
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+ }
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+ }
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+
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+ return true;
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+ }
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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index c849ded5448112289a3c37f05dc49fadbf619f81..77f88e081991e85d03540e30b9def5dac9ad59be 100644
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--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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@@ -483,6 +483,7 @@ public class ServerChunkCache extends ChunkSource {
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this.level.asyncChunkTaskManager.raisePriority(x1, z1, com.destroystokyo.paper.io.PrioritizedTaskQueue.HIGHEST_PRIORITY);
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com.destroystokyo.paper.io.chunk.ChunkTaskManager.pushChunkWait(this.level, x1, z1);
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// Paper end
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+ com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x1, z1); // Paper - sync load info
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this.level.timings.syncChunkLoad.startTiming(); // Paper
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chunkproviderserver_a.managedBlock(completablefuture::isDone);
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com.destroystokyo.paper.io.chunk.ChunkTaskManager.popChunkWait(); // Paper - async chunk debug
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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 fcf5c7b28e927db977ad5b851edaf68e59de8d5b..87a18dcbfbb55410f04e99e84958f22f21193066 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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@@ -280,6 +280,12 @@ public class ServerLevel extends net.minecraft.world.level.Level implements Worl
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};
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public final com.destroystokyo.paper.io.chunk.ChunkTaskManager asyncChunkTaskManager;
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// Paper end
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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.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ) != null;
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+ }
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+ // Paper end
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// Paper start - optimise getPlayerByUUID
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@Nullable
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