109 lines
5.3 KiB
Diff
109 lines
5.3 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/SystemUtils.java b/src/main/java/net/minecraft/SystemUtils.java
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index 68ce7605bd63ea280b96db8230463d2afb0a6cb1..46d82c1548088b8305f758699388edf0d5d4d050 100644
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--- a/src/main/java/net/minecraft/SystemUtils.java
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+++ b/src/main/java/net/minecraft/SystemUtils.java
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@@ -45,6 +45,7 @@ import java.util.stream.Stream;
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import javax.annotation.Nullable;
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import net.minecraft.resources.MinecraftKey;
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import net.minecraft.server.DispenserRegistry;
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+import net.minecraft.server.ServerWorkerThread;
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import net.minecraft.util.MathHelper;
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import net.minecraft.util.datafix.DataConverterRegistry;
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import net.minecraft.world.level.block.state.properties.IBlockState;
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@@ -54,8 +55,8 @@ import org.apache.logging.log4j.Logger;
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public class SystemUtils {
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private static final AtomicInteger c = new AtomicInteger(1);
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- private static final ExecutorService d = a("Bootstrap");
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- private static final ExecutorService e = a("Main");
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+ private static final ExecutorService d = a("Bootstrap", -2); // Paper - add -2 priority
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+ private static final ExecutorService e = a("Main", -1); // Paper - add -1 priority
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private static final ExecutorService f = n();
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public static LongSupplier a = System::nanoTime;
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public static final UUID b = new UUID(0L, 0L); public static final UUID getNullUUID() {return b;} // Paper OBFHELPER
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@@ -85,15 +86,18 @@ public class SystemUtils {
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return Instant.now().toEpochMilli();
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}
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- private static ExecutorService a(String s) {
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- int i = MathHelper.clamp(Runtime.getRuntime().availableProcessors() - 1, 1, 7);
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- Object object;
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+ private static ExecutorService a(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 object;
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if (i <= 0) {
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object = MoreExecutors.newDirectExecutorService();
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} else {
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- object = new ForkJoinPool(i, (forkjoinpool) -> {
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- ForkJoinWorkerThread forkjoinworkerthread = new ForkJoinWorkerThread(forkjoinpool) {
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+ object = 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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protected void onTermination(Throwable throwable) {
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if (throwable != null) {
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SystemUtils.LOGGER.warn("{} died", this.getName(), throwable);
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@@ -109,6 +113,7 @@ public class SystemUtils {
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return forkjoinworkerthread;
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}, SystemUtils::a, true);
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}
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+ }*/ // Paper end
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return (ExecutorService) object;
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}
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@@ -157,6 +162,7 @@ public class SystemUtils {
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});
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}
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+ public static void onThreadError(Thread thread, Throwable throwable) { a(thread, throwable); } // Paper - OBFHELPER
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private static void a(Thread thread, Throwable throwable) {
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c(throwable);
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if (throwable instanceof CompletionException) {
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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 8166ad11642bb1b4b11722a5a09e773a2e749c47..021adb8a6b8c9e05c03391d0f8edfa71b3c0c246 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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@@ -285,6 +285,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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S s0 = function.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..4ff28bd2ab2e85a45d79b46c82ebba6a489579ca
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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 net.minecraft.SystemUtils;
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+import java.util.concurrent.atomic.AtomicInteger;
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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(SystemUtils::onThreadError);
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+ }
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+}
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