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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."
101 lines
5.0 KiB
Diff
101 lines
5.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Tue, 23 Oct 2018 23:14:38 -0400
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Subject: [PATCH] Improve Server Thread Pool and Thread Priorities
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Use a simple executor since Fork join is a much more complex pool
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type and we are not using its capabilities.
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Set thread priorities so main thread has above normal priority over
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server threads
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Allow usage of a single thread executor by not using ForkJoin so single core CPU's.
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diff --git a/src/main/java/net/minecraft/Util.java b/src/main/java/net/minecraft/Util.java
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index 65e0ca442980f273d2fe5f131e174cd92f80da20..81f4f26a6b83079d36acd1fd86dede0eb1116c01 100644
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--- a/src/main/java/net/minecraft/Util.java
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+++ b/src/main/java/net/minecraft/Util.java
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@@ -56,7 +56,7 @@ import java.util.stream.Stream;
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import javax.annotation.Nullable;
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import net.minecraft.resources.ResourceLocation;
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import net.minecraft.server.Bootstrap;
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-import net.minecraft.util.Mth;
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+import net.minecraft.server.ServerWorkerThread;
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import net.minecraft.util.datafix.DataFixers;
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import net.minecraft.world.level.block.state.properties.Property;
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import org.apache.commons.io.IOUtils;
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@@ -65,8 +65,8 @@ import org.apache.logging.log4j.Logger;
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public class Util {
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private static final AtomicInteger WORKER_COUNT = new AtomicInteger(1);
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- private static final ExecutorService BOOTSTRAP_EXECUTOR = makeExecutor("Bootstrap");
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- private static final ExecutorService BACKGROUND_EXECUTOR = makeExecutor("Main");
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+ private static final ExecutorService BOOTSTRAP_EXECUTOR = makeExecutor("Bootstrap", -2); // Paper - add -2 priority
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+ private static final ExecutorService BACKGROUND_EXECUTOR = makeExecutor("Main", -1); // Paper - add -1 priority
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private static final ExecutorService IO_POOL = makeIoExecutor();
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public static LongSupplier timeSource = System::nanoTime;
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public static final UUID NIL_UUID = new UUID(0L, 0L);
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@@ -101,14 +101,18 @@ public class Util {
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return Instant.now().toEpochMilli();
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}
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- private static ExecutorService makeExecutor(String name) {
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- int i = Mth.clamp(Runtime.getRuntime().availableProcessors() - 1, 1, 7);
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+ private static ExecutorService makeExecutor(String s, int priorityModifier) { // Paper - add priority
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+ // Paper start - use simpler thread pool that allows 1 thread
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+ int i = Math.min(8, Math.max(Runtime.getRuntime().availableProcessors() - 2, 1));
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+ i = Integer.getInteger("Paper.WorkerThreadCount", i);
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ExecutorService executorService;
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+
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if (i <= 0) {
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executorService = MoreExecutors.newDirectExecutorService();
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} else {
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- executorService = new ForkJoinPool(i, (forkJoinPool) -> {
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- ForkJoinWorkerThread forkJoinWorkerThread = new ForkJoinWorkerThread(forkJoinPool) {
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+ executorService = new java.util.concurrent.ThreadPoolExecutor(i, i,0L, TimeUnit.MILLISECONDS, new java.util.concurrent.LinkedBlockingQueue<Runnable>(), target -> new ServerWorkerThread(target, s, priorityModifier));
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+ }
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+ /*
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@Override
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protected void onTermination(Throwable throwable) {
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if (throwable != null) {
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@@ -124,6 +128,7 @@ public class Util {
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return forkJoinWorkerThread;
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}, Util::onThreadException, true);
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}
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+ }*/ // Paper end
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return executorService;
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}
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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 627887227e266155c025592b50defede4271d978..b008f3360ded33b185d28ed8555839eb21bf16d9 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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@@ -318,6 +318,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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S s0 = serverFactory.apply(thread); // CraftBukkit - decompile error
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atomicreference.set(s0);
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+ thread.setPriority(Thread.NORM_PRIORITY+2); // Paper - boost priority
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thread.start();
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return s0;
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}
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diff --git a/src/main/java/net/minecraft/server/ServerWorkerThread.java b/src/main/java/net/minecraft/server/ServerWorkerThread.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..480129f430da33157342becb9d3b010f9f7c5edd
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--- /dev/null
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+++ b/src/main/java/net/minecraft/server/ServerWorkerThread.java
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@@ -0,0 +1,14 @@
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+package net.minecraft.server;
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+
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+import java.util.concurrent.atomic.AtomicInteger;
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+import net.minecraft.Util;
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+
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+public class ServerWorkerThread extends Thread {
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+ private static final AtomicInteger threadId = new AtomicInteger(1);
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+ public ServerWorkerThread(Runnable target, String poolName, int prioritityModifier) {
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+ super(target, "Worker-" + poolName + "-" + threadId.getAndIncrement());
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+ setPriority(Thread.NORM_PRIORITY+prioritityModifier); // Deprioritize over main
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+ this.setDaemon(true);
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+ this.setUncaughtExceptionHandler(Util::onThreadException);
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+ }
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+}
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