2019-06-25 15:55:44 +02:00
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From 172a0901aac5f304b6bcb900fd92729478dfb3c4 Mon Sep 17 00:00:00 2001
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2015-01-29 22:25:50 +01:00
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From: Aikar <aikar@aikar.co>
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2016-03-01 00:09:49 +01:00
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Date: Tue, 1 Mar 2016 23:09:29 -0600
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2014-10-20 00:58:49 +02:00
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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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2019-06-25 15:55:44 +02:00
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index 1346fc35c5..968ce67956 100644
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2014-10-20 00:58:49 +02:00
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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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2019-06-25 03:47:58 +02:00
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@@ -147,7 +147,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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2014-10-20 00:58:49 +02:00
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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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2016-03-01 00:09:49 +01:00
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+ public static int currentTick = 0; // Paper - Further improve tick loop
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2014-10-20 00:58:49 +02:00
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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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2019-04-24 04:34:11 +02:00
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public File bukkitDataPackFolder;
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2019-06-25 03:47:58 +02:00
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@@ -157,7 +157,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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2017-01-31 05:33:54 +01:00
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// Spigot start
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2018-08-26 20:11:49 +02:00
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public static final int TPS = 20;
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public static final int TICK_TIME = 1000000000 / TPS;
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2014-10-20 00:58:49 +02:00
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- private static final int SAMPLE_INTERVAL = 100;
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2018-08-26 20:11:49 +02:00
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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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2017-01-31 05:33:54 +01:00
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public final SlackActivityAccountant slackActivityAccountant = new SlackActivityAccountant();
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// Spigot end
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2019-06-25 15:55:44 +02:00
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@@ -758,6 +758,57 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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2018-08-26 20:11:49 +02:00
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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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2016-03-01 00:09:49 +01:00
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+ // Paper start - Further improve server tick loop
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2014-10-20 00:58:49 +02:00
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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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2018-08-26 20:11:49 +02:00
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+ private long lastTick = 0;
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+ private long catchupTime = 0;
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2014-10-20 00:58:49 +02:00
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+ public final RollingAverage tps1 = new RollingAverage(60);
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2014-11-28 02:17:45 +01:00
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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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2014-10-20 00:58:49 +02:00
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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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2018-09-18 04:32:37 +02:00
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+ private java.math.BigDecimal total;
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2014-10-20 00:58:49 +02:00
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+ private int index = 0;
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2018-09-18 04:32:37 +02:00
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+ private final java.math.BigDecimal[] samples;
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2014-10-20 00:58:49 +02:00
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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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2018-09-18 04:32:37 +02:00
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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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2014-10-20 00:58:49 +02:00
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+ this.times = new long[size];
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+ for (int i = 0; i < size; i++) {
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2018-09-18 04:32:37 +02:00
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+ this.samples[i] = dec(TPS);
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2014-10-20 00:58:49 +02:00
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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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2018-09-18 04:32:37 +02:00
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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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2014-10-20 00:58:49 +02:00
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+ time -= times[index];
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2018-09-18 04:32:37 +02:00
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+ total = total.subtract(samples[index].multiply(dec(times[index])));
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2014-10-20 00:58:49 +02:00
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+ samples[index] = x;
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+ times[index] = t;
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+ time += t;
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2018-09-18 04:32:37 +02:00
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+ total = total.add(x.multiply(dec(t)));
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2014-10-20 00:58:49 +02:00
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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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2018-09-18 04:32:37 +02:00
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+ return total.divide(dec(time), 30, java.math.RoundingMode.HALF_UP).doubleValue();
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2014-10-20 00:58:49 +02:00
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+ }
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2018-08-26 20:11:49 +02:00
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+ }
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2018-09-18 04:32:37 +02:00
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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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2016-03-01 00:09:49 +01:00
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+ // Paper End
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2018-08-26 20:11:49 +02:00
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// Spigot End
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2017-01-31 05:33:54 +01:00
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2014-10-20 00:58:49 +02:00
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public void run() {
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2019-06-25 15:55:44 +02:00
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@@ -770,30 +821,38 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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2014-10-20 00:58:49 +02:00
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// Spigot start
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2015-07-26 22:58:37 +02:00
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Arrays.fill( recentTps, 20 );
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2019-04-24 04:34:11 +02:00
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- long curTime, tickSection = SystemUtils.getMonotonicMillis(), tickCount = 1;
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2019-05-22 05:58:00 +02:00
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+ long start = System.nanoTime(), curTime, tickSection = start; // Paper - Further improve server tick loop
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2018-08-26 20:11:49 +02:00
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+ lastTick = start - TICK_TIME; // Paper
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2014-10-20 00:58:49 +02:00
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while (this.isRunning) {
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2019-05-22 20:57:27 +02:00
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- long i = (curTime = SystemUtils.getMonotonicMillis()) - this.nextTick;
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+ long i = ((curTime = System.nanoTime()) / (1000L * 1000L)) - this.nextTick; // Paper
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2019-05-22 05:58:00 +02:00
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2019-05-22 20:57:27 +02:00
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if (i > 5000L && this.nextTick - this.lastOverloadTime >= 30000L) { // CraftBukkit
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2019-05-22 05:58:00 +02:00
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long j = i / 50L;
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if (server.getWarnOnOverload()) // CraftBukkit
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2019-04-24 04:34:11 +02:00
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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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2019-05-22 05:58:00 +02:00
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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.nextTick += j * 50L;
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this.lastOverloadTime = this.nextTick;
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2014-10-20 00:58:49 +02:00
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}
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2018-08-09 15:02:05 +02:00
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- if ( tickCount++ % SAMPLE_INTERVAL == 0 )
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2014-11-28 02:17:45 +01:00
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+ if ( ++MinecraftServer.currentTick % SAMPLE_INTERVAL == 0 )
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2014-10-20 00:58:49 +02:00
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{
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2019-04-24 04:34:11 +02:00
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- double currentTps = 1E3 / ( curTime - tickSection ) * SAMPLE_INTERVAL;
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2014-10-20 00:58:49 +02:00
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- recentTps[0] = calcTps( recentTps[0], 0.92, currentTps ); // 1/exp(5sec/1min)
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- recentTps[1] = calcTps( recentTps[1], 0.9835, currentTps ); // 1/exp(5sec/5min)
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- recentTps[2] = calcTps( recentTps[2], 0.9945, currentTps ); // 1/exp(5sec/15min)
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+ final long diff = curTime - tickSection;
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2018-09-18 04:32:37 +02:00
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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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2014-10-20 00:58:49 +02:00
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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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2015-07-26 22:58:37 +02:00
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+ // Backwards compat with bad plugins
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+ recentTps[0] = tps1.getAverage();
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+ recentTps[1] = tps5.getAverage();
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+ recentTps[2] = tps15.getAverage();
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2016-03-01 00:09:49 +01:00
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+ // Paper end
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2014-10-20 00:58:49 +02:00
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tickSection = curTime;
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}
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2019-04-24 04:34:11 +02:00
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// Spigot end
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2018-08-10 16:25:45 +02:00
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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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2019-05-07 02:05:41 +02:00
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+ lastTick = curTime;
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2018-12-17 06:18:06 +01:00
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this.nextTick += 50L;
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2019-06-25 03:47:58 +02:00
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if (this.S) {
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this.S = false;
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2014-10-20 00:58:49 +02:00
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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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2019-06-25 03:47:58 +02:00
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index a51b917d08..1776c49b00 100644
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2014-10-20 00:58:49 +02:00
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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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2019-05-06 04:58:04 +02:00
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@@ -1923,6 +1923,17 @@ public final class CraftServer implements Server {
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2016-03-01 00:09:49 +01:00
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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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2019-05-06 05:53:47 +02:00
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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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2016-03-01 00:09:49 +01:00
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+ };
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+ }
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+ // Paper end
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+
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2014-11-28 02:17:45 +01:00
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private final Spigot spigot = new Spigot()
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{
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2014-10-20 00:58:49 +02:00
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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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2019-06-06 17:36:57 +02:00
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index be2e31deae..6d21c32692 100644
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2014-10-20 00:58:49 +02:00
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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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2014-11-28 02:17:45 +01:00
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@@ -1,8 +1,5 @@
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2014-10-20 00:58:49 +02:00
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package org.spigotmc;
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-import com.google.common.base.Joiner;
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-import net.minecraft.server.MinecraftServer;
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2014-11-28 02:17:45 +01:00
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-import com.google.common.collect.Iterables;
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2014-10-20 00:58:49 +02:00
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import org.bukkit.ChatColor;
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import org.bukkit.command.Command;
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import org.bukkit.command.CommandSender;
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2016-03-01 00:09:49 +01:00
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@@ -26,18 +23,20 @@ public class TicksPerSecondCommand extends Command
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2014-10-20 00:58:49 +02:00
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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( format( tps ) );
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- sb.append( ", " );
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2016-03-01 00:09:49 +01:00
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+ // Paper start - Further improve tick handling
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+ double[] tps = org.bukkit.Bukkit.getTPS();
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2014-10-20 00:58:49 +02:00
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+ String[] tpsAvg = new String[tps.length];
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+
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2016-03-01 00:09:49 +01:00
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+ for ( int i = 0; i < tps.length; i++) {
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+ tpsAvg[i] = format( tps[i] );
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2014-10-20 00:58:49 +02:00
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}
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- sender.sendMessage( sb.substring( 0, sb.length() - 2 ) );
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2014-11-28 02:17:45 +01:00
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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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2016-03-01 00:09:49 +01:00
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+ // Paper end
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2014-10-20 00:58:49 +02:00
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return true;
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}
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- private String format(double tps)
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2016-03-01 00:09:49 +01:00
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+ private static String format(double tps) // Paper - Made static
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2014-10-20 00:58:49 +02:00
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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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--
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2019-06-25 03:47:58 +02:00
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2.22.0
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2014-10-20 00:58:49 +02:00
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