From d2787c0ed42e7c7dc65ecd1568870afa951229db Mon Sep 17 00:00:00 2001 From: md_5 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 +++++++++------------- .../craftbukkit/command/TicksPerSecondCommand.java | 35 +++++++++++++++ 2 files changed, 55 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 955a3ac..99a6cf4 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 processQueue = new java.util.concurrent.ConcurrentLinkedQueue(); 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); } 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-rc2