e6f8284125
Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: d43a1e72 SPIGOT-2450: Improve scoreboard criteria API, add missing DisplaySlots 9d6e4847 SPIGOT-7122: New Allay Methods from 1.19.1 CraftBukkit Changes: c379a6b4e SPIGOT-2450: Improve scoreboard criteria API, add missing DisplaySlots 051fcced1 SPIGOT-7122: New Allay Methods from 1.19.1
213 Zeilen
11 KiB
Diff
213 Zeilen
11 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Tue, 1 Mar 2016 23:09:29 -0600
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Subject: [PATCH] Further improve server tick loop
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Improves how the catchup buffer is handled, allowing it to roll both ways
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increasing the effeciency of the thread sleep so it only will sleep once.
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Also increases the buffer of the catchup to ensure server stays at 20 TPS unless extreme conditions
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Previous implementation did not calculate TPS correctly.
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Switch to a realistic rolling average and factor in std deviation as an extra reporting variable
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 97e2cbd5fa724ba5ba3f33ac1ce3da2e3e881eb8..0e982051f6c833fd5ff2ccbe098cb7a98bd0dc8a 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -270,7 +270,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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public org.bukkit.command.ConsoleCommandSender console;
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public org.bukkit.command.RemoteConsoleCommandSender remoteConsole;
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public ConsoleReader reader;
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- public static int currentTick = (int) (System.currentTimeMillis() / 50);
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+ public static int currentTick = 0; // Paper - Further improve tick loop
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public java.util.Queue<Runnable> processQueue = new java.util.concurrent.ConcurrentLinkedQueue<Runnable>();
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public int autosavePeriod;
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public Commands vanillaCommandDispatcher;
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@@ -279,7 +279,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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// Spigot start
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public static final int TPS = 20;
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public static final int TICK_TIME = 1000000000 / MinecraftServer.TPS;
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- private static final int SAMPLE_INTERVAL = 100;
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+ private static final int SAMPLE_INTERVAL = 20; // Paper
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public final double[] recentTps = new double[ 3 ];
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// Spigot end
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public final io.papermc.paper.configuration.PaperConfigurations paperConfigurations;
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@@ -964,6 +964,57 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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{
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return ( avg * exp ) + ( tps * ( 1 - exp ) );
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}
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+
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+ // Paper start - Further improve server tick loop
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+ private static final long SEC_IN_NANO = 1000000000;
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+ private static final long MAX_CATCHUP_BUFFER = TICK_TIME * TPS * 60L;
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+ private long lastTick = 0;
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+ private long catchupTime = 0;
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+ public final RollingAverage tps1 = new RollingAverage(60);
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+ public final RollingAverage tps5 = new RollingAverage(60 * 5);
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+ public final RollingAverage tps15 = new RollingAverage(60 * 15);
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+
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+ public static class RollingAverage {
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+ private final int size;
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+ private long time;
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+ private java.math.BigDecimal total;
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+ private int index = 0;
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+ private final java.math.BigDecimal[] samples;
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+ private final long[] times;
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+
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+ RollingAverage(int size) {
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+ this.size = size;
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+ this.time = size * SEC_IN_NANO;
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+ this.total = dec(TPS).multiply(dec(SEC_IN_NANO)).multiply(dec(size));
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+ this.samples = new java.math.BigDecimal[size];
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+ this.times = new long[size];
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+ for (int i = 0; i < size; i++) {
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+ this.samples[i] = dec(TPS);
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+ this.times[i] = SEC_IN_NANO;
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+ }
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+ }
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+
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+ private static java.math.BigDecimal dec(long t) {
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+ return new java.math.BigDecimal(t);
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+ }
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+ public void add(java.math.BigDecimal x, long t) {
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+ time -= times[index];
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+ total = total.subtract(samples[index].multiply(dec(times[index])));
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+ samples[index] = x;
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+ times[index] = t;
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+ time += t;
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+ total = total.add(x.multiply(dec(t)));
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+ if (++index == size) {
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+ index = 0;
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+ }
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+ }
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+
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+ public double getAverage() {
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+ return total.divide(dec(time), 30, java.math.RoundingMode.HALF_UP).doubleValue();
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+ }
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+ }
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+ private static final java.math.BigDecimal TPS_BASE = new java.math.BigDecimal(1E9).multiply(new java.math.BigDecimal(SAMPLE_INTERVAL));
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+ // Paper End
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// Spigot End
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protected void runServer() {
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@@ -981,26 +1032,33 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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// Spigot start
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Arrays.fill( recentTps, 20 );
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- long curTime, tickSection = Util.getMillis(), tickCount = 1;
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+ long start = System.nanoTime(), curTime, tickSection = start; // Paper - Further improve server tick loop
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+ lastTick = start - TICK_TIME; // Paper
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while (this.running) {
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- long i = (curTime = Util.getMillis()) - this.nextTickTime;
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+ long i = ((curTime = System.nanoTime()) / (1000L * 1000L)) - this.nextTickTime; // Paper
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if (i > 5000L && this.nextTickTime - this.lastOverloadWarning >= 30000L) { // CraftBukkit
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long j = i / 50L;
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if (this.server.getWarnOnOverload()) // CraftBukkit
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- MinecraftServer.LOGGER.warn("Can't keep up! Is the server overloaded? Running {}ms or {} ticks behind", i, j);
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+ MinecraftServer.LOGGER.warn("Can't keep up! Is the server overloaded? Running {}ms or {} ticks behind", i, j);
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this.nextTickTime += j * 50L;
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this.lastOverloadWarning = this.nextTickTime;
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}
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++MinecraftServer.currentTickLong; // Paper
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- if ( tickCount++ % MinecraftServer.SAMPLE_INTERVAL == 0 )
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+ if ( ++MinecraftServer.currentTick % MinecraftServer.SAMPLE_INTERVAL == 0 )
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{
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- double currentTps = 1E3 / ( curTime - tickSection ) * MinecraftServer.SAMPLE_INTERVAL;
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- this.recentTps[0] = MinecraftServer.calcTps( this.recentTps[0], 0.92, currentTps ); // 1/exp(5sec/1min)
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- this.recentTps[1] = MinecraftServer.calcTps( this.recentTps[1], 0.9835, currentTps ); // 1/exp(5sec/5min)
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- this.recentTps[2] = MinecraftServer.calcTps( this.recentTps[2], 0.9945, currentTps ); // 1/exp(5sec/15min)
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+ final long diff = curTime - tickSection;
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+ java.math.BigDecimal currentTps = TPS_BASE.divide(new java.math.BigDecimal(diff), 30, java.math.RoundingMode.HALF_UP);
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+ tps1.add(currentTps, diff);
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+ tps5.add(currentTps, diff);
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+ tps15.add(currentTps, diff);
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+ // Backwards compat with bad plugins
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+ this.recentTps[0] = tps1.getAverage();
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+ this.recentTps[1] = tps5.getAverage();
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+ this.recentTps[2] = tps15.getAverage();
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+ // Paper end
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tickSection = curTime;
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}
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// Spigot end
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@@ -1010,7 +1068,8 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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this.debugCommandProfiler = new MinecraftServer.TimeProfiler(Util.getNanos(), this.tickCount);
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}
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- MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit
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+ //MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit // Paper - don't overwrite current tick time
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+ lastTick = curTime;
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this.nextTickTime += 50L;
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this.startMetricsRecordingTick();
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this.profiler.push("tick");
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index df74d459809da72c55dd93c299dd2b414fb64dea..bd17e22c6cb3176da054bce3699c278b2354f193 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -2409,6 +2409,17 @@ public final class CraftServer implements Server {
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return CraftMagicNumbers.INSTANCE;
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}
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+ // Paper - Add getTPS API - Further improve tick loop
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+ @Override
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+ public double[] getTPS() {
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+ return new double[] {
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+ net.minecraft.server.MinecraftServer.getServer().tps1.getAverage(),
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+ net.minecraft.server.MinecraftServer.getServer().tps5.getAverage(),
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+ net.minecraft.server.MinecraftServer.getServer().tps15.getAverage()
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+ };
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+ }
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+ // Paper end
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+
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// Spigot start
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private final org.bukkit.Server.Spigot spigot = new org.bukkit.Server.Spigot()
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{
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diff --git a/src/main/java/org/spigotmc/TicksPerSecondCommand.java b/src/main/java/org/spigotmc/TicksPerSecondCommand.java
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index 4ab81a99f906e3f28e026d0e50b5b943c1bdcfb5..9bede6a26c08ede063c7a38f1149c811df14b258 100644
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--- a/src/main/java/org/spigotmc/TicksPerSecondCommand.java
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+++ b/src/main/java/org/spigotmc/TicksPerSecondCommand.java
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@@ -24,22 +24,30 @@ public class TicksPerSecondCommand extends Command
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return true;
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}
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- StringBuilder sb = new StringBuilder( ChatColor.GOLD + "TPS from last 1m, 5m, 15m: " );
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- for ( double tps : MinecraftServer.getServer().recentTps )
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- {
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- sb.append( this.format( tps ) );
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- sb.append( ", " );
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+ // Paper start - Further improve tick handling
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+ double[] tps = org.bukkit.Bukkit.getTPS();
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+ String[] tpsAvg = new String[tps.length];
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+
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+ for ( int i = 0; i < tps.length; i++) {
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+ tpsAvg[i] = TicksPerSecondCommand.format( tps[i] );
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+ }
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+ sender.sendMessage(ChatColor.GOLD + "TPS from last 1m, 5m, 15m: " + org.apache.commons.lang.StringUtils.join(tpsAvg, ", "));
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+ if (args.length > 0 && args[0].equals("mem") && sender.hasPermission("bukkit.command.tpsmemory")) {
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+ sender.sendMessage(ChatColor.GOLD + "Current Memory Usage: " + ChatColor.GREEN + ((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (1024 * 1024)) + "/" + (Runtime.getRuntime().totalMemory() / (1024 * 1024)) + " mb (Max: " + (Runtime.getRuntime().maxMemory() / (1024 * 1024)) + " mb)");
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+ if (!hasShownMemoryWarning) {
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+ sender.sendMessage(ChatColor.RED + "Warning: " + ChatColor.GOLD + " Memory usage on modern garbage collectors is not a stable value and it is perfectly normal to see it reach max. Please do not pay it much attention.");
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+ hasShownMemoryWarning = true;
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+ }
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}
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- sender.sendMessage( sb.substring( 0, sb.length() - 2 ) );
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- sender.sendMessage(ChatColor.GOLD + "Current Memory Usage: " + ChatColor.GREEN + ((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / (1024 * 1024)) + "/" + (Runtime.getRuntime().totalMemory() / (1024 * 1024)) + " mb (Max: "
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- + (Runtime.getRuntime().maxMemory() / (1024 * 1024)) + " mb)");
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+ // Paper end
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return true;
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}
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- private String format(double tps)
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+ private boolean hasShownMemoryWarning; // Paper
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+ private static String format(double tps) // Paper - Made static
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{
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return ( ( tps > 18.0 ) ? ChatColor.GREEN : ( tps > 16.0 ) ? ChatColor.YELLOW : ChatColor.RED ).toString()
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- + ( ( tps > 20.0 ) ? "*" : "" ) + Math.min( Math.round( tps * 100.0 ) / 100.0, 20.0 );
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+ + ( ( tps > 21.0 ) ? "*" : "" ) + Math.min( Math.round( tps * 100.0 ) / 100.0, 20.0 ); // Paper - only print * at 21, we commonly peak to 20.02 as the tick sleep is not accurate enough, stop the noise
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}
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}
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