332 Zeilen
14 KiB
Diff
332 Zeilen
14 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
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/paper syncloadinfo
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- To clear clear the currently stored sync load info, use
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/paper syncloadinfo clear
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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..0bb4aaa546939b67a5d22865190f30478a9337c1
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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 +1,175 @@
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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 clear() {
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+ SYNC_LOADS.clear();
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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/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java
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index ae51993e0de706cb62c96795ca9de7663893a5bf..5bfa245a621a0bf7ef60cd01f4c04576b770384e 100644
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--- a/src/main/java/io/papermc/paper/command/PaperCommand.java
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+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java
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@@ -40,6 +40,7 @@ public final class PaperCommand extends Command {
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commands.put(Set.of("dumpplugins"), new DumpPluginsCommand());
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commands.put(Set.of("fixlight"), new FixLightCommand());
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commands.put(Set.of("debug", "chunkinfo", "holderinfo"), new ChunkDebugCommand());
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+ commands.put(Set.of("syncloadinfo"), new SyncLoadInfoCommand());
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return commands.entrySet().stream()
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.flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue())))
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diff --git a/src/main/java/io/papermc/paper/command/subcommands/SyncLoadInfoCommand.java b/src/main/java/io/papermc/paper/command/subcommands/SyncLoadInfoCommand.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..95d6022c9cfb2e36ec5a71be6e34354027c2ec08
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/command/subcommands/SyncLoadInfoCommand.java
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@@ -0,0 +1,88 @@
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+package io.papermc.paper.command.subcommands;
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+
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+import com.destroystokyo.paper.io.SyncLoadFinder;
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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 io.papermc.paper.command.CommandUtil;
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+import io.papermc.paper.command.PaperSubcommand;
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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.nio.charset.StandardCharsets;
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+import java.time.LocalDateTime;
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+import java.time.format.DateTimeFormatter;
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+import java.util.List;
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+
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+import net.kyori.adventure.text.event.ClickEvent;
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+import net.kyori.adventure.text.event.HoverEvent;
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+import net.minecraft.server.MinecraftServer;
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+import org.bukkit.command.CommandSender;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.checkerframework.framework.qual.DefaultQualifier;
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+
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+import static net.kyori.adventure.text.Component.text;
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+import static net.kyori.adventure.text.format.NamedTextColor.GRAY;
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+import static net.kyori.adventure.text.format.NamedTextColor.GREEN;
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+import static net.kyori.adventure.text.format.NamedTextColor.RED;
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+import static net.kyori.adventure.text.format.NamedTextColor.WHITE;
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+
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+@DefaultQualifier(NonNull.class)
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+public final class SyncLoadInfoCommand implements PaperSubcommand {
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+ @Override
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+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
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+ this.doSyncLoadInfo(sender, args);
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+ return true;
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+ }
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+
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+ @Override
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+ public List<String> tabComplete(final CommandSender sender, final String subCommand, final String[] args) {
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+ return CommandUtil.getListMatchingLast(sender, args, "clear");
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+ }
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+
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+ private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss");
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+
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+ private void doSyncLoadInfo(final CommandSender sender, final String[] args) {
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+ if (!SyncLoadFinder.ENABLED) {
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+ String systemFlag = "-Dpaper.debug-sync-loads=true";
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+ sender.sendMessage(text().color(RED).append(text("This command requires the server startup flag '")).append(
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+ text(systemFlag, WHITE).clickEvent(ClickEvent.copyToClipboard(systemFlag))
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+ .hoverEvent(HoverEvent.showText(text("Click to copy the system flag")))).append(
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+ text("' to be set.")));
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+ return;
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+ }
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+
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+ if (args.length > 0 && args[0].equals("clear")) {
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+ SyncLoadFinder.clear();
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+ sender.sendMessage(text("Sync load data cleared.", GRAY));
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+ return;
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+ }
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+
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+ File file = new File(new File(new File("."), "debug"),
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+ "sync-load-info-" + FORMATTER.format(LocalDateTime.now()) + ".txt");
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+ file.getParentFile().mkdirs();
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+ sender.sendMessage(text("Writing sync load info to " + file, GREEN));
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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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+ try (
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+ PrintStream out = new PrintStream(new FileOutputStream(file), false, StandardCharsets.UTF_8)
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+ ) {
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+ out.print(stringWriter);
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+ }
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+ sender.sendMessage(text("Successfully written sync load information!", GREEN));
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+ } catch (Throwable thr) {
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+ sender.sendMessage(text("Failed to write sync load information! See the console for more info.", RED));
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+ MinecraftServer.LOGGER.warn("Error occurred while dumping sync chunk load info", thr);
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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 603f9d1f501a18214f11a6e401f2c43d9c3cf8eb..1c327067d488cc916d082a797b161cb7836ffa2e 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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@@ -294,6 +294,7 @@ public class ServerChunkCache extends ChunkSource {
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// Paper start - async chunk io/loading
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io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.pushChunkWait(this.level, x1, z1); // Paper - rewrite chunk system
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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_b.managedBlock(completablefuture::isDone);
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io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - async chunk debug // Paper - rewrite chunk system
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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 62ea2bb2fdd1f2de31b08c88193887989fbd3ece..fc6cf61664b4c64c9319c61b447a02e2cc38558f 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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@@ -651,6 +651,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
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this.entityLookup = new io.papermc.paper.chunk.system.entity.EntityLookup(this, new EntityCallbacks()); // Paper - rewrite chunk system
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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.getChunkSource().getChunkAtIfLoadedImmediately(chunkX, chunkZ) != null;
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+ }
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+ // Paper end
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+
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/** @deprecated */
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@Deprecated
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@VisibleForTesting
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