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ab347c4c96
Upstream has released updates that appears 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: 42d5a714 SPIGOT-5899: Hoglins API similar to Piglins 2c1ee10e SPIGOT-5887: ClickType doesn't include off hand swaps 5ff7c7ce SPIGOT-5886: Missing BlockData CraftBukkit Changes:7560f5f5SPIGOT-5905: Fix hex colours not being allowed in MOTDd47c47eeSPIGOT-5889: Villager using composter should call EntityChangeBlockEvent2fe6b4a3SPIGOT-5899: Hoglins API similar to Piglinse09dbecaSPIGOT-5887: ClickType doesn't include off hand swaps23aac2a5SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously92cbf656SPIGOT-5884: Tab completions lost on reloadData / minecraft:reloadfb4e54adSPIGOT-5902: PlayerRespawnEvent places player at spawn before event is calledaa8f3d5aSPIGOT-5901: Structures are generated in all worlds based on the setting for the main worlda0c35937SPIGOT-5895: PlayerChangedWorldEvent#getFrom is incorrect89c0a5c3SPIGOT-5886: Missing BlockData Spigot Changes: 0287a20d SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously
208 lines
11 KiB
Diff
208 lines
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 9eacc1ba58986c21c5d8dc8d8d14c6f3b48fd171..7b58499c24d5a4296cc539087ca86d2ec4148b1c 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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@@ -144,7 +144,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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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 CommandDispatcher vanillaCommandDispatcher;
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@@ -153,7 +153,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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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 / 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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public final SlackActivityAccountant slackActivityAccountant = new SlackActivityAccountant();
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// Spigot end
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@@ -807,6 +807,57 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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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 v() {
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@@ -819,30 +870,38 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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// Spigot start
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Arrays.fill( recentTps, 20 );
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- long curTime, tickSection = SystemUtils.getMonotonicMillis(), 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.isRunning) {
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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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if (i > 5000L && this.nextTick - this.lastOverloadTime >= 30000L) { // CraftBukkit
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long j = i / 50L;
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if (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.nextTick += j * 50L;
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this.lastOverloadTime = this.nextTick;
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}
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- if ( tickCount++ % SAMPLE_INTERVAL == 0 )
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+ if ( ++MinecraftServer.currentTick % SAMPLE_INTERVAL == 0 )
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{
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- double currentTps = 1E3 / ( curTime - tickSection ) * SAMPLE_INTERVAL;
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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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+ 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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+ recentTps[0] = tps1.getAverage();
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+ recentTps[1] = tps5.getAverage();
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+ 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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- 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.nextTick += 50L;
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GameProfilerTick gameprofilertick = GameProfilerTick.a("Server");
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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 c9995ba10ac864fe4168196fa1932b689dc0a534..4eaf0e5be8cfd5b6455701adace14fb750192af5 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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@@ -2045,6 +2045,17 @@ 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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private final Spigot spigot = new 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 9cd57c9d5fe59ceb2cd307e4e1a2052c9ac428fe..7218f23df4d06ff1ca612286e4a404246389ab18 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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@@ -26,22 +26,30 @@ 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( 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] = 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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