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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
135 lines
6.9 KiB
Diff
135 lines
6.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Phoenix616 <max@themoep.de>
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Date: Mon, 28 Jun 2021 22:38:29 +0100
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Subject: [PATCH] Rate options and timings for sensors and behaviors
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This adds config options to specify the tick rate for sensors
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and behaviors of different entity types as well as timings
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for those in order to be able to have some metrics as to which
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ones might need tweaking.
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diff --git a/src/main/java/co/aikar/timings/MinecraftTimings.java b/src/main/java/co/aikar/timings/MinecraftTimings.java
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index 4bd813161a5d76a83cdbd0a9209b9ea9e60ffe1b..e2764186bd6b838ed5cd86c15597a08d079ef984 100644
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--- a/src/main/java/co/aikar/timings/MinecraftTimings.java
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+++ b/src/main/java/co/aikar/timings/MinecraftTimings.java
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@@ -115,6 +115,14 @@ public final class MinecraftTimings {
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return Timings.ofSafe("Minecraft", "## tickEntity - " + entityType + " - " + type, tickEntityTimer);
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}
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+ public static Timing getBehaviorTimings(String type) {
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+ return Timings.ofSafe("## Behavior - " + type);
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+ }
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+
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+ public static Timing getSensorTimings(String type, int rate) {
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+ return Timings.ofSafe("## Sensor - " + type + " (Default rate: " + rate + ")");
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+ }
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+
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/**
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* Get a named timer for the specified tile entity type to track type specific timings.
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* @param entity
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diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/Behavior.java b/src/main/java/net/minecraft/world/entity/ai/behavior/Behavior.java
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index f639cafa64d98a001e622882c647701547f5c3ac..9379dd4056018b52c93ed4888dcdc94579bd9691 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/behavior/Behavior.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/Behavior.java
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@@ -14,6 +14,10 @@ public abstract class Behavior<E extends LivingEntity> implements BehaviorContro
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private long endTimestamp;
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private final int minDuration;
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private final int maxDuration;
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+ // Paper start - configurable behavior tick rate and timings
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+ private final String configKey;
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+ private final co.aikar.timings.Timing timing;
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+ // Paper end - configurable behavior tick rate and timings
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public Behavior(Map<MemoryModuleType<?>, MemoryStatus> requiredMemoryState) {
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this(requiredMemoryState, 60);
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@@ -27,6 +31,15 @@ public abstract class Behavior<E extends LivingEntity> implements BehaviorContro
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this.minDuration = minRunTime;
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this.maxDuration = maxRunTime;
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this.entryCondition = requiredMemoryState;
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+ // Paper start - configurable behavior tick rate and timings
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+ String key = io.papermc.paper.util.MappingEnvironment.reobf() ? io.papermc.paper.util.ObfHelper.INSTANCE.deobfClassName(this.getClass().getName()) : this.getClass().getName();
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+ int lastSeparator = key.lastIndexOf('.');
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+ if (lastSeparator != -1) {
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+ key = key.substring(lastSeparator + 1);
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+ }
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+ this.configKey = key.toLowerCase(java.util.Locale.ROOT);
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+ this.timing = co.aikar.timings.MinecraftTimings.getBehaviorTimings(configKey);
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+ // Paper end - configurable behavior tick rate and timings
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}
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@Override
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@@ -36,11 +49,19 @@ public abstract class Behavior<E extends LivingEntity> implements BehaviorContro
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@Override
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public final boolean tryStart(ServerLevel world, E entity, long time) {
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+ // Paper start - configurable behavior tick rate and timings
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+ int tickRate = java.util.Objects.requireNonNullElse(world.paperConfig().tickRates.behavior.get(entity.getType(), this.configKey), -1);
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+ if (tickRate > -1 && time < this.endTimestamp + tickRate) {
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+ return false;
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+ }
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+ // Paper end - configurable behavior tick rate and timings
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if (this.hasRequiredMemories(entity) && this.checkExtraStartConditions(world, entity)) {
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this.status = Behavior.Status.RUNNING;
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int i = this.minDuration + world.getRandom().nextInt(this.maxDuration + 1 - this.minDuration);
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this.endTimestamp = time + (long)i;
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+ this.timing.startTiming(); // Paper - behavior timings
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this.start(world, entity, time);
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+ this.timing.stopTiming(); // Paper - behavior timings
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return true;
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} else {
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return false;
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@@ -52,11 +73,13 @@ public abstract class Behavior<E extends LivingEntity> implements BehaviorContro
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@Override
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public final void tickOrStop(ServerLevel world, E entity, long time) {
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+ this.timing.startTiming(); // Paper - behavior timings
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if (!this.timedOut(time) && this.canStillUse(world, entity, time)) {
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this.tick(world, entity, time);
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} else {
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this.doStop(world, entity, time);
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}
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+ this.timing.stopTiming(); // Paper - behavior timings
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}
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protected void tick(ServerLevel world, E entity, long time) {
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diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
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index 671fc7725d7c801a2ba009da5bd1bc1a9530f187..85b4b24361e785acf75571ff98f924c00ae80748 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/Sensor.java
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@@ -26,8 +26,21 @@ public abstract class Sensor<E extends LivingEntity> {
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.ignoreInvisibilityTesting();
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private final int scanRate;
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private long timeToTick;
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+ // Paper start - configurable sensor tick rate and timings
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+ private final String configKey;
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+ private final co.aikar.timings.Timing timing;
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+ // Paper end
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public Sensor(int senseInterval) {
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+ // Paper start - configurable sensor tick rate and timings
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+ String key = io.papermc.paper.util.MappingEnvironment.reobf() ? io.papermc.paper.util.ObfHelper.INSTANCE.deobfClassName(this.getClass().getName()) : this.getClass().getName();
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+ int lastSeparator = key.lastIndexOf('.');
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+ if (lastSeparator != -1) {
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+ key = key.substring(lastSeparator + 1);
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+ }
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+ this.configKey = key.toLowerCase(java.util.Locale.ROOT);
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+ this.timing = co.aikar.timings.MinecraftTimings.getSensorTimings(configKey, senseInterval);
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+ // Paper end
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this.scanRate = senseInterval;
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this.timeToTick = (long)RANDOM.nextInt(senseInterval);
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}
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@@ -38,8 +51,12 @@ public abstract class Sensor<E extends LivingEntity> {
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public final void tick(ServerLevel world, E entity) {
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if (--this.timeToTick <= 0L) {
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- this.timeToTick = (long)this.scanRate;
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+ // Paper start - configurable sensor tick rate and timings
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+ this.timeToTick = java.util.Objects.requireNonNullElse(world.paperConfig().tickRates.sensor.get(entity.getType(), this.configKey), this.scanRate);
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+ this.timing.startTiming();
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+ // Paper end
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this.doTick(world, entity);
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+ this.timing.stopTiming(); // Paper - sensor timings
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}
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}
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