mirror of
https://github.com/PaperMC/Paper.git
synced 2024-09-12 06:58:11 +02:00
Process loads outside of any canSleep check. Original intent was to only apply those restrictions to generations but realized I had some checks higher up the call chain. Reworked the back off strategy to just run every 1 millisecond per world, and to apply the per tick limit to generations only. This guarantees that your chunk will load with at most around 1ms delay. Additionally, fire midTick processing in a few more places, notably the oversleep section so we can keep processing loads here too which has a large up to 50ms window... Speaking of oversleep, we had a bug in our implementation changes for Timings that caused oversleep to not sleep the correct amount. Because we now moved it into the NEXT tick instead of THIS tick, the value of nextTick had already been increased to +50ms, resulting in the risk of sleeping more than it should, but, more importantly, this caused every task that was trying to NOT run during oversleep to actually run during oversleep. This is now fixed. Another small tweak is to the /tps command, to no longer show the star when TPS is right at 20. Due to ineffeciencies in the sleep precision, TPS is commonly 20.02. This causes the star to show up almost constantly, so now only show it if we actually hit a real "catchup". This commit also improves the changes to the CallbackExecutor, in that it now is also recursion safe. It was possible that the executor could run tasks out of desired order if the executor task scheduled more executor tasks. We solve this by ensuring new additions do not enter the currently iterated queue. Each depth level will have its own queue. Fixes #3220
211 lines
10 KiB
Diff
211 lines
10 KiB
Diff
From f8b2b0e30d6bfb90e265a6d91ee8b96729761fda Mon Sep 17 00:00:00 2001
|
|
From: Aikar <aikar@aikar.co>
|
|
Date: Tue, 1 Mar 2016 23:09:29 -0600
|
|
Subject: [PATCH] Further improve server tick loop
|
|
|
|
Improves how the catchup buffer is handled, allowing it to roll both ways
|
|
increasing the effeciency of the thread sleep so it only will sleep once.
|
|
|
|
Also increases the buffer of the catchup to ensure server stays at 20 TPS unless extreme conditions
|
|
|
|
Previous implementation did not calculate TPS correctly.
|
|
Switch to a realistic rolling average and factor in std deviation as an extra reporting variable
|
|
|
|
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
index e71ee0fb33..53d0a98d00 100644
|
|
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
|
|
@@ -160,7 +160,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
|
|
public org.bukkit.command.ConsoleCommandSender console;
|
|
public org.bukkit.command.RemoteConsoleCommandSender remoteConsole;
|
|
public ConsoleReader reader;
|
|
- public static int currentTick = (int) (System.currentTimeMillis() / 50);
|
|
+ public static int currentTick = 0; // Paper - Further improve tick loop
|
|
public java.util.Queue<Runnable> processQueue = new java.util.concurrent.ConcurrentLinkedQueue<Runnable>();
|
|
public int autosavePeriod;
|
|
public File bukkitDataPackFolder;
|
|
@@ -170,7 +170,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
|
|
// Spigot start
|
|
public static final int TPS = 20;
|
|
public static final int TICK_TIME = 1000000000 / TPS;
|
|
- private static final int SAMPLE_INTERVAL = 100;
|
|
+ private static final int SAMPLE_INTERVAL = 20; // Paper
|
|
public final double[] recentTps = new double[ 3 ];
|
|
public final SlackActivityAccountant slackActivityAccountant = new SlackActivityAccountant();
|
|
// Spigot end
|
|
@@ -778,6 +778,57 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
|
|
{
|
|
return ( avg * exp ) + ( tps * ( 1 - exp ) );
|
|
}
|
|
+
|
|
+ // Paper start - Further improve server tick loop
|
|
+ private static final long SEC_IN_NANO = 1000000000;
|
|
+ private static final long MAX_CATCHUP_BUFFER = TICK_TIME * TPS * 60L;
|
|
+ private long lastTick = 0;
|
|
+ private long catchupTime = 0;
|
|
+ public final RollingAverage tps1 = new RollingAverage(60);
|
|
+ public final RollingAverage tps5 = new RollingAverage(60 * 5);
|
|
+ public final RollingAverage tps15 = new RollingAverage(60 * 15);
|
|
+
|
|
+ public static class RollingAverage {
|
|
+ private final int size;
|
|
+ private long time;
|
|
+ private java.math.BigDecimal total;
|
|
+ private int index = 0;
|
|
+ private final java.math.BigDecimal[] samples;
|
|
+ private final long[] times;
|
|
+
|
|
+ RollingAverage(int size) {
|
|
+ this.size = size;
|
|
+ this.time = size * SEC_IN_NANO;
|
|
+ this.total = dec(TPS).multiply(dec(SEC_IN_NANO)).multiply(dec(size));
|
|
+ this.samples = new java.math.BigDecimal[size];
|
|
+ this.times = new long[size];
|
|
+ for (int i = 0; i < size; i++) {
|
|
+ this.samples[i] = dec(TPS);
|
|
+ this.times[i] = SEC_IN_NANO;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ private static java.math.BigDecimal dec(long t) {
|
|
+ return new java.math.BigDecimal(t);
|
|
+ }
|
|
+ public void add(java.math.BigDecimal x, long t) {
|
|
+ time -= times[index];
|
|
+ total = total.subtract(samples[index].multiply(dec(times[index])));
|
|
+ samples[index] = x;
|
|
+ times[index] = t;
|
|
+ time += t;
|
|
+ total = total.add(x.multiply(dec(t)));
|
|
+ if (++index == size) {
|
|
+ index = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ public double getAverage() {
|
|
+ return total.divide(dec(time), 30, java.math.RoundingMode.HALF_UP).doubleValue();
|
|
+ }
|
|
+ }
|
|
+ private static final java.math.BigDecimal TPS_BASE = new java.math.BigDecimal(1E9).multiply(new java.math.BigDecimal(SAMPLE_INTERVAL));
|
|
+ // Paper End
|
|
// Spigot End
|
|
|
|
public void run() {
|
|
@@ -790,30 +841,38 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
|
|
|
|
// Spigot start
|
|
Arrays.fill( recentTps, 20 );
|
|
- long curTime, tickSection = SystemUtils.getMonotonicMillis(), tickCount = 1;
|
|
+ long start = System.nanoTime(), curTime, tickSection = start; // Paper - Further improve server tick loop
|
|
+ lastTick = start - TICK_TIME; // Paper
|
|
while (this.isRunning) {
|
|
- long i = (curTime = SystemUtils.getMonotonicMillis()) - this.nextTick;
|
|
+ long i = ((curTime = System.nanoTime()) / (1000L * 1000L)) - this.nextTick; // Paper
|
|
|
|
if (i > 5000L && this.nextTick - this.lastOverloadTime >= 30000L) { // CraftBukkit
|
|
long j = i / 50L;
|
|
|
|
if (server.getWarnOnOverload()) // CraftBukkit
|
|
- MinecraftServer.LOGGER.warn("Can't keep up! Is the server overloaded? Running {}ms or {} ticks behind", i, j);
|
|
+ MinecraftServer.LOGGER.warn("Can't keep up! Is the server overloaded? Running {}ms or {} ticks behind", i, j);
|
|
this.nextTick += j * 50L;
|
|
this.lastOverloadTime = this.nextTick;
|
|
}
|
|
|
|
- if ( tickCount++ % SAMPLE_INTERVAL == 0 )
|
|
+ if ( ++MinecraftServer.currentTick % SAMPLE_INTERVAL == 0 )
|
|
{
|
|
- double currentTps = 1E3 / ( 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)
|
|
+ final long diff = curTime - tickSection;
|
|
+ java.math.BigDecimal currentTps = TPS_BASE.divide(new java.math.BigDecimal(diff), 30, java.math.RoundingMode.HALF_UP);
|
|
+ tps1.add(currentTps, diff);
|
|
+ tps5.add(currentTps, diff);
|
|
+ tps15.add(currentTps, diff);
|
|
+ // Backwards compat with bad plugins
|
|
+ recentTps[0] = tps1.getAverage();
|
|
+ recentTps[1] = tps5.getAverage();
|
|
+ recentTps[2] = tps15.getAverage();
|
|
+ // Paper end
|
|
tickSection = curTime;
|
|
}
|
|
// Spigot end
|
|
|
|
- MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit
|
|
+ //MinecraftServer.currentTick = (int) (System.currentTimeMillis() / 50); // CraftBukkit // Paper - don't overwrite current tick time
|
|
+ lastTick = curTime;
|
|
this.nextTick += 50L;
|
|
if (this.T) {
|
|
this.T = false;
|
|
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
index 99a6b3d443..e3939387e7 100644
|
|
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
|
|
@@ -1970,6 +1970,17 @@ public final class CraftServer implements Server {
|
|
return CraftMagicNumbers.INSTANCE;
|
|
}
|
|
|
|
+ // Paper - Add getTPS API - Further improve tick loop
|
|
+ @Override
|
|
+ public double[] getTPS() {
|
|
+ return new double[] {
|
|
+ net.minecraft.server.MinecraftServer.getServer().tps1.getAverage(),
|
|
+ net.minecraft.server.MinecraftServer.getServer().tps5.getAverage(),
|
|
+ net.minecraft.server.MinecraftServer.getServer().tps15.getAverage()
|
|
+ };
|
|
+ }
|
|
+ // Paper end
|
|
+
|
|
private final Spigot spigot = new Spigot()
|
|
{
|
|
|
|
diff --git a/src/main/java/org/spigotmc/TicksPerSecondCommand.java b/src/main/java/org/spigotmc/TicksPerSecondCommand.java
|
|
index be2e31deae..387af9d5c0 100644
|
|
--- a/src/main/java/org/spigotmc/TicksPerSecondCommand.java
|
|
+++ b/src/main/java/org/spigotmc/TicksPerSecondCommand.java
|
|
@@ -1,8 +1,5 @@
|
|
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;
|
|
@@ -26,20 +23,22 @@ public class TicksPerSecondCommand extends Command
|
|
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( ", " );
|
|
+ // Paper start - Further improve tick handling
|
|
+ double[] tps = org.bukkit.Bukkit.getTPS();
|
|
+ String[] tpsAvg = new String[tps.length];
|
|
+
|
|
+ for ( int i = 0; i < tps.length; i++) {
|
|
+ tpsAvg[i] = format( tps[i] );
|
|
}
|
|
- sender.sendMessage( sb.substring( 0, sb.length() - 2 ) );
|
|
+ sender.sendMessage( ChatColor.GOLD + "TPS from last 1m, 5m, 15m: " + org.apache.commons.lang.StringUtils.join(tpsAvg, ", "));
|
|
+ // Paper end
|
|
|
|
return true;
|
|
}
|
|
|
|
- private String format(double tps)
|
|
+ private static String format(double tps) // Paper - Made static
|
|
{
|
|
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 );
|
|
+ + ( ( 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
|
|
}
|
|
}
|
|
--
|
|
2.26.2
|
|
|