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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
66 lines
3.6 KiB
Diff
66 lines
3.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Callahan <mr.callahhh@gmail.com>
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Date: Wed, 8 Apr 2020 02:42:14 -0500
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Subject: [PATCH] Async command map building
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This adds a custom pool inorder to make sure that they are closed
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without much though, as it doesn't matter if the client is not sent
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commands if the server is restarting. Using the default async pool caused issues to arise
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due to the shutdown logic generally being much later.
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diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
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index 72756ef14b8ec8afd80313b9f6aaf76722cb18cf..a05aea8561ac102476ee1b3068942b095950a86a 100644
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--- a/src/main/java/net/minecraft/commands/Commands.java
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+++ b/src/main/java/net/minecraft/commands/Commands.java
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@@ -450,6 +450,24 @@ public class Commands {
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if ( org.spigotmc.SpigotConfig.tabComplete < 0 ) return; // Spigot
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// CraftBukkit start
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// Register Vanilla commands into builtRoot as before
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+ // Paper start - Perf: Async command map building
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+ COMMAND_SENDING_POOL.execute(() -> {
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+ this.sendAsync(player);
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+ });
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+ }
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+
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+ public static final java.util.concurrent.ThreadPoolExecutor COMMAND_SENDING_POOL = new java.util.concurrent.ThreadPoolExecutor(
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+ 0, 2, 60L, java.util.concurrent.TimeUnit.SECONDS,
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+ new java.util.concurrent.LinkedBlockingQueue<>(),
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+ new com.google.common.util.concurrent.ThreadFactoryBuilder()
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+ .setNameFormat("Paper Async Command Builder Thread Pool - %1$d")
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+ .setUncaughtExceptionHandler(new net.minecraft.DefaultUncaughtExceptionHandlerWithName(net.minecraft.server.MinecraftServer.LOGGER))
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+ .build(),
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+ new java.util.concurrent.ThreadPoolExecutor.DiscardPolicy()
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+ );
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+
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+ private void sendAsync(ServerPlayer player) {
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+ // Paper end - Perf: Async command map building
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Map<CommandNode<CommandSourceStack>, CommandNode<SharedSuggestionProvider>> map = Maps.newIdentityHashMap(); // Use identity to prevent aliasing issues
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RootCommandNode vanillaRoot = new RootCommandNode();
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@@ -467,7 +485,14 @@ public class Commands {
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for (CommandNode node : rootcommandnode.getChildren()) {
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bukkit.add(node.getName());
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}
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+ // Paper start - Perf: Async command map building
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+ net.minecraft.server.MinecraftServer.getServer().execute(() -> {
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+ runSync(player, bukkit, rootcommandnode);
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+ });
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+ }
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+ private void runSync(ServerPlayer player, Collection<String> bukkit, RootCommandNode<SharedSuggestionProvider> rootcommandnode) {
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+ // Paper end - Perf: Async command map building
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PlayerCommandSendEvent event = new PlayerCommandSendEvent(player.getBukkitEntity(), new LinkedHashSet<>(bukkit));
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event.getPlayer().getServer().getPluginManager().callEvent(event);
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 699191356a9d873fa6bbe04ea3e5db91eb2db41d..8ecfd7a3daa99dabe796d28d27790fb8b45c628b 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -930,6 +930,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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}
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MinecraftServer.LOGGER.info("Stopping server");
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+ Commands.COMMAND_SENDING_POOL.shutdownNow(); // Paper - Perf: Async command map building; Shutdown and don't bother finishing
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MinecraftTimings.stopServer(); // Paper
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// CraftBukkit start
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if (this.server != null) {
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