Paper/CraftBukkit-Patches/0016-Tick-loop-optimization-sleep-for-as-long-as-possible.patch

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From fa1eeb2d804ba81c94d259d60df735627eae989f 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] Tick loop optimization - sleep for as long as possible.
---
.../java/net/minecraft/server/MinecraftServer.java | 50 +++++++++-------------
src/main/java/org/bukkit/craftbukkit/Spigot.java | 2 +
.../craftbukkit/command/TicksPerSecondCommand.java | 35 +++++++++++++++
3 files changed, 57 insertions(+), 30 deletions(-)
create mode 100644 src/main/java/org/bukkit/craftbukkit/command/TicksPerSecondCommand.java
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 4bdf8aa..128016f 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -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
l = this;
@@ -397,39 +403,23 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
public void run() {
try {
if (this.init()) {
- long i = System.currentTimeMillis();
-
- for (long j = 0L; this.isRunning; this.Q = true) {
- long k = System.currentTimeMillis();
- long l = k - i;
-
- if (l > 2000L && i - this.R >= 15000L) {
- if (this.server.getWarnOnOverload()) // CraftBukkit - Added option to suppress warning messages
- log.warning("Can\'t keep up! Did the system time change, or is the server overloaded?");
- l = 2000L;
- this.R = i;
- }
-
- if (l < 0L) {
- log.warning("Time ran backwards! Did the system time change?");
- l = 0L;
- }
-
- j += l;
- i = k;
- if (this.worlds.get(0).everyoneDeeplySleeping()) { // CraftBukkit
- this.q();
- j = 0L;
+ // Spigot start
+ 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;
- this.q();
- }
+ 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++;
+ this.q();
}
+ // Spigot end
} else {
this.a((CrashReport) null);
}
2013-02-08 07:09:51 +01:00
diff --git a/src/main/java/org/bukkit/craftbukkit/Spigot.java b/src/main/java/org/bukkit/craftbukkit/Spigot.java
index 4a4f949..db46037 100644
2013-02-08 07:09:51 +01:00
--- a/src/main/java/org/bukkit/craftbukkit/Spigot.java
+++ b/src/main/java/org/bukkit/craftbukkit/Spigot.java
@@ -6,6 +6,8 @@ import org.bukkit.configuration.file.YamlConfiguration;
2013-02-08 07:09:51 +01:00
public class Spigot {
2013-02-08 07:09:51 +01:00
public static void initialize(CraftServer server, SimpleCommandMap commandMap, YamlConfiguration configuration) {
+ commandMap.register("bukkit", new org.bukkit.craftbukkit.command.TicksPerSecondCommand("tps"));
+
server.whitelistMessage = configuration.getString("settings.whitelist-message", server.whitelistMessage);
server.stopMessage = configuration.getString("settings.stop-message", server.stopMessage);
server.logCommands = configuration.getBoolean("settings.log-commands", true);
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;
+ }
+}
--
1.8.1.1