Paper/CraftBukkit-Patches/0016-Highly-Optimized-Tick-Loop.patch

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From 641e8a34d01845e770f07b08fe316c6ad5951f49 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sun, 3 Feb 2013 12:28:17 +1100
Subject: [PATCH] Highly Optimized Tick Loop
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 3a8154a..d8e9e8d 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -86,6 +86,12 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
public java.util.Queue<Runnable> processQueue = new java.util.concurrent.ConcurrentLinkedQueue<Runnable>();
public int autosavePeriod;
// CraftBukkit end
+ // Spigot start
+ private static final int TPS = 20;
+ private static final int TICK_TIME = 1000000000 / TPS;
+ public static double currentTPS = 0;
+ private static long catchupTime = 0;
+ // Spigot end
public MinecraftServer(OptionSet options) { // CraftBukkit - signature file -> OptionSet
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this.c = Proxy.NO_PROXY;
@@ -389,39 +395,23 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
public void run() {
try {
if (this.init()) {
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- long i = aq();
-
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- for (long j = 0L; this.isRunning; this.Q = true) {
- long k = aq();
- long l = k - i;
-
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- if (l > 2000L && i - this.R >= 15000L) {
- if (this.server.getWarnOnOverload()) // CraftBukkit - Added option to suppress warning messages
- this.getLogger().warning("Can\'t keep up! Did the system time change, or is the server overloaded?");
- l = 2000L;
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- this.R = i;
- }
-
- if (l < 0L) {
- this.getLogger().warning("Time ran backwards! Did the system time change?");
- l = 0L;
- }
-
- j += l;
- i = k;
- if (this.worlds.get(0).everyoneDeeplySleeping()) { // CraftBukkit
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- this.s();
- j = 0L;
+ // Spigot start
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+ for (long lastTick = 0L; this.isRunning; this.Q = true) {
+ long curTime = System.nanoTime();
+ long wait = TICK_TIME - (curTime - lastTick) - catchupTime;
+ if (wait > 0) {
+ Thread.sleep(wait / 1000000);
+ catchupTime = 0;
+ continue;
} else {
- while (j > 50L) {
- MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit
- j -= 50L;
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- this.s();
- }
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+ catchupTime = Math.min(TICK_TIME * TPS, Math.abs(wait));
}
-
- Thread.sleep(1L);
+ currentTPS = (currentTPS * 0.95) + (1E9 / (curTime - lastTick) * 0.05);
+ lastTick = curTime;
+ MinecraftServer.currentTick++;
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+ this.s();
}
+ // Spigot end
} else {
this.a((CrashReport) null);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/command/TicksPerSecondCommand.java b/src/main/java/org/bukkit/craftbukkit/command/TicksPerSecondCommand.java
new file mode 100644
index 0000000..f114a31
--- /dev/null
+++ b/src/main/java/org/bukkit/craftbukkit/command/TicksPerSecondCommand.java
@@ -0,0 +1,35 @@
+package org.bukkit.craftbukkit.command;
+
+import net.minecraft.server.MinecraftServer;
+import org.bukkit.ChatColor;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+
+public class TicksPerSecondCommand extends Command {
+
+ public TicksPerSecondCommand(String name) {
+ super(name);
+ this.description = "Gets the current ticks per second for the server";
+ this.usageMessage = "/tps";
+ this.setPermission("bukkit.command.tps");
+ }
+
+ @Override
+ public boolean execute(CommandSender sender, String currentAlias, String[] args) {
+ if (!testPermission(sender)) return true;
+
+ double tps = Math.min(20, Math.round(MinecraftServer.currentTPS * 10) / 10.0);
+ ChatColor color;
+ if (tps > 19.2D) {
+ color = ChatColor.GREEN;
+ } else if (tps > 17.4D) {
+ color = ChatColor.YELLOW;
+ } else {
+ color = ChatColor.RED;
+ }
+
+ sender.sendMessage(ChatColor.GOLD + "[TPS] " + color + tps);
+
+ return true;
+ }
+}
diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
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index e4eaecd..7880a31 100644
--- a/src/main/java/org/spigotmc/SpigotConfig.java
+++ b/src/main/java/org/spigotmc/SpigotConfig.java
@@ -14,6 +14,7 @@ import net.minecraft.server.MinecraftServer;
import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.craftbukkit.command.TicksPerSecondCommand;
public class SpigotConfig
{
@@ -117,4 +118,9 @@ public class SpigotConfig
{
preventProxies = getBoolean( "settings.prevent-proxies", false );
}
+
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+ private static void tpsCommand()
+ {
+ commands.put( "tps", new TicksPerSecondCommand( "tps" ) );
+ }
}
--
1.8.1.2