From fdcb23ae30c7e144baba75b1ea021186943d4bf6 Mon Sep 17 00:00:00 2001 From: md_5 Date: Sat, 25 Jan 2014 14:08:35 +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 fbd9b4e..c831ce3 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -120,6 +120,12 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs 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; + private static final int SAMPLE_INTERVAL = 100; + public final double[] recentTps = new double[ 3 ]; + // Spigot end public MinecraftServer(OptionSet options, Proxy proxy, File file1) { this.e = proxy; @@ -501,6 +507,13 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs this.isRunning = false; } + // Spigot Start + private static double calcTps(double avg, double exp, double tps) + { + return ( avg * exp ) + ( tps * ( 1 - exp ) ); + } + // Spigot End + public void run() { try { if (this.init()) { @@ -511,38 +524,34 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs this.r.setServerInfo(new ServerPing.ServerData("1.8.3", 47)); this.a(this.r); + // Spigot start + Arrays.fill( recentTps, 20 ); + long lastTick = System.nanoTime(), catchupTime = 0, curTime, wait, tickSection = lastTick; while (this.isRunning) { - long j = ay(); - long k = j - this.ab; - - if (k > 2000L && this.ab - this.R >= 15000L) { - if (server.getWarnOnOverload()) // CraftBukkit - MinecraftServer.LOGGER.warn("Can\'t keep up! Did the system time change, or is the server overloaded? Running {}ms behind, skipping {} tick(s)", new Object[] { Long.valueOf(k), Long.valueOf(k / 50L)}); - k = 2000L; - this.R = this.ab; - } - - if (k < 0L) { - MinecraftServer.LOGGER.warn("Time ran backwards! Did the system time change?"); - k = 0L; + curTime = System.nanoTime(); + wait = TICK_TIME - (curTime - lastTick) - catchupTime; + if (wait > 0) { + Thread.sleep(wait / 1000000); + catchupTime = 0; + continue; + } else { + catchupTime = Math.min(1000000000, Math.abs(wait)); } - i += k; - this.ab = j; - if (this.worlds.get(0).everyoneDeeplySleeping()) { - this.z(); - i = 0L; - } else { - while (i > 50L) { - MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit - i -= 50L; - this.z(); - } + if ( MinecraftServer.currentTick++ % SAMPLE_INTERVAL == 0 ) + { + double currentTps = 1E9 / ( curTime - tickSection ) * SAMPLE_INTERVAL; + recentTps[0] = calcTps( recentTps[0], 0.92, currentTps ); // 1/exp(5sec/1min) + recentTps[1] = calcTps( recentTps[1], 0.9835, currentTps ); // 1/exp(5sec/5min) + recentTps[2] = calcTps( recentTps[2], 0.9945, currentTps ); // 1/exp(5sec/15min) + tickSection = curTime; } + lastTick = curTime; - Thread.sleep(Math.max(1L, 50L - i)); + this.z(); this.Q = true; } + // Spigot end } else { this.a((CrashReport) null); } diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java index 9566cfa..345a49c 100644 --- a/src/main/java/org/spigotmc/SpigotConfig.java +++ b/src/main/java/org/spigotmc/SpigotConfig.java @@ -261,4 +261,9 @@ public class SpigotConfig "screen." ); } } + + private static void tpsCommand() + { + commands.put( "tps", new TicksPerSecondCommand( "tps" ) ); + } } diff --git a/src/main/java/org/spigotmc/TicksPerSecondCommand.java b/src/main/java/org/spigotmc/TicksPerSecondCommand.java new file mode 100644 index 0000000..be2e31d --- /dev/null +++ b/src/main/java/org/spigotmc/TicksPerSecondCommand.java @@ -0,0 +1,45 @@ +package org.spigotmc; + +import com.google.common.base.Joiner; +import net.minecraft.server.MinecraftServer; +import com.google.common.collect.Iterables; +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; + } + + StringBuilder sb = new StringBuilder( ChatColor.GOLD + "TPS from last 1m, 5m, 15m: " ); + for ( double tps : MinecraftServer.getServer().recentTps ) + { + sb.append( format( tps ) ); + sb.append( ", " ); + } + sender.sendMessage( sb.substring( 0, sb.length() - 2 ) ); + + return true; + } + + private String format(double tps) + { + return ( ( tps > 18.0 ) ? ChatColor.GREEN : ( tps > 16.0 ) ? ChatColor.YELLOW : ChatColor.RED ).toString() + + ( ( tps > 20.0 ) ? "*" : "" ) + Math.min( Math.round( tps * 100.0 ) / 100.0, 20.0 ); + } +} -- 2.1.0