mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-25 12:05:53 +01:00
106 lines
5.3 KiB
Diff
106 lines
5.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Tue, 23 Oct 2018 23:14:38 -0400
|
|
Subject: [PATCH] Improve Server Thread Pool and Thread Priorities
|
|
|
|
Use a simple executor since Fork join is a much more complex pool
|
|
type and we are not using its capabilities.
|
|
|
|
Set thread priorities so main thread has above normal priority over
|
|
server threads
|
|
|
|
Allow usage of a single thread executor by not using ForkJoin so single core CPU's
|
|
and reduce worldgen thread worker count for low core count CPUs.
|
|
|
|
== AT ==
|
|
public net.minecraft.Util onThreadException(Ljava/lang/Thread;Ljava/lang/Throwable;)V
|
|
|
|
Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
|
|
|
|
diff --git a/src/main/java/io/papermc/paper/util/ServerWorkerThread.java b/src/main/java/io/papermc/paper/util/ServerWorkerThread.java
|
|
new file mode 100644
|
|
index 0000000000000000000000000000000000000000..b60f59cf5cc8eb84a6055b7861857dece7f2501b
|
|
--- /dev/null
|
|
+++ b/src/main/java/io/papermc/paper/util/ServerWorkerThread.java
|
|
@@ -0,0 +1,14 @@
|
|
+package io.papermc.paper.util;
|
|
+
|
|
+import java.util.concurrent.atomic.AtomicInteger;
|
|
+import net.minecraft.Util;
|
|
+
|
|
+public class ServerWorkerThread extends Thread {
|
|
+ private static final AtomicInteger threadId = new AtomicInteger(1);
|
|
+ public ServerWorkerThread(Runnable target, String poolName, int prioritityModifier) {
|
|
+ super(target, "Worker-" + poolName + "-" + threadId.getAndIncrement());
|
|
+ setPriority(Thread.NORM_PRIORITY+prioritityModifier); // Deprioritize over main
|
|
+ this.setDaemon(true);
|
|
+ this.setUncaughtExceptionHandler(Util::onThreadException);
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/net/minecraft/Util.java b/src/main/java/net/minecraft/Util.java
|
|
index 54562fa04d14a937451ea7aa9d80194f2c31b471..4cf88f6d815d60cfbf8e4ecf9d96d0cfadd0620b 100644
|
|
--- a/src/main/java/net/minecraft/Util.java
|
|
+++ b/src/main/java/net/minecraft/Util.java
|
|
@@ -89,7 +89,7 @@ public class Util {
|
|
private static final int DEFAULT_MAX_THREADS = 255;
|
|
private static final int DEFAULT_SAFE_FILE_OPERATION_RETRIES = 10;
|
|
private static final String MAX_THREADS_SYSTEM_PROPERTY = "max.bg.threads";
|
|
- private static final ExecutorService BACKGROUND_EXECUTOR = makeExecutor("Main");
|
|
+ private static final ExecutorService BACKGROUND_EXECUTOR = makeExecutor("Main", -1); // Paper - Perf: add priority
|
|
private static final ExecutorService IO_POOL = makeIoExecutor("IO-Worker-", false);
|
|
private static final ExecutorService DOWNLOAD_POOL = makeIoExecutor("Download-", true);
|
|
// Paper start - don't submit BLOCKING PROFILE LOOKUPS to the world gen thread
|
|
@@ -160,15 +160,27 @@ public class Util {
|
|
return FILENAME_DATE_TIME_FORMATTER.format(ZonedDateTime.now());
|
|
}
|
|
|
|
- private static ExecutorService makeExecutor(String name) {
|
|
- int i = Mth.clamp(Runtime.getRuntime().availableProcessors() - 1, 1, getMaxThreads());
|
|
+ private static ExecutorService makeExecutor(String s, int priorityModifier) { // Paper - Perf: add priority
|
|
+ // Paper start - Perf: use simpler thread pool that allows 1 thread and reduce worldgen thread worker count for low core count CPUs
|
|
+ int cpus = Runtime.getRuntime().availableProcessors() / 2;
|
|
+ int i;
|
|
+ if (cpus <= 4) {
|
|
+ i = cpus <= 2 ? 1 : 2;
|
|
+ } else if (cpus <= 8) {
|
|
+ // [5, 8]
|
|
+ i = Math.max(3, cpus - 2);
|
|
+ } else {
|
|
+ i = cpus * 2 / 3;
|
|
+ }
|
|
+ i = Math.min(8, i);
|
|
+ i = Integer.getInteger("Paper.WorkerThreadCount", i);
|
|
ExecutorService executorService;
|
|
if (i <= 0) {
|
|
executorService = MoreExecutors.newDirectExecutorService();
|
|
} else {
|
|
- AtomicInteger atomicInteger = new AtomicInteger(1);
|
|
- executorService = new ForkJoinPool(i, pool -> {
|
|
- ForkJoinWorkerThread forkJoinWorkerThread = new ForkJoinWorkerThread(pool) {
|
|
+ executorService = new java.util.concurrent.ThreadPoolExecutor(i, i,0L, TimeUnit.MILLISECONDS, new java.util.concurrent.LinkedBlockingQueue<>(), target -> new io.papermc.paper.util.ServerWorkerThread(target, s, priorityModifier));
|
|
+ }
|
|
+ /*
|
|
@Override
|
|
protected void onTermination(Throwable throwable) {
|
|
if (throwable != null) {
|
|
@@ -184,6 +196,7 @@ public class Util {
|
|
return forkJoinWorkerThread;
|
|
}, Util::onThreadException, true);
|
|
}
|
|
+ }*/ // Paper end - Perf: use simpler thread pool
|
|
|
|
return executorService;
|
|
}
|
|
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
index 5d429b707383e6620a0d83f23d7a8694ecc70735..995ee6b2af01a14d61a031008dd05518668a98ae 100644
|
|
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
@@ -323,6 +323,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
|
|
thread.setUncaughtExceptionHandler((thread1, throwable) -> {
|
|
MinecraftServer.LOGGER.error("Uncaught exception in server thread", throwable);
|
|
});
|
|
+ thread.setPriority(Thread.NORM_PRIORITY+2); // Paper - Perf: Boost priority
|
|
if (Runtime.getRuntime().availableProcessors() > 4) {
|
|
thread.setPriority(8);
|
|
}
|