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01a13871de
Patch documentation to come Issues with the old system that are fixed now: - World generation does not scale with cpu cores effectively. - Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps. - Unreliable prioritisation of chunk gen/load calls that block the main thread. - Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved. - Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal. - Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles. The above list is not complete. The patch documentation will complete it. New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil. Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft. The old legacy chunk system patches have been moved to the removed folder in case we need them again.
34 lines
2.1 KiB
Diff
34 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sat, 18 Jul 2020 16:03:57 -0700
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Subject: [PATCH] Distance manager tick timings
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Recently this has been taking up more time, so add a timings to
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really figure out how much.
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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 5ec241d49ff5e3a161a39006f05823a5de847c5e..435b3b6d05e00803386d123c66f961c97da83d40 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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@@ -45,6 +45,7 @@ public final class MinecraftTimings {
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public static final Timing antiXrayUpdateTimer = Timings.ofSafe("anti-xray - update");
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public static final Timing antiXrayObfuscateTimer = Timings.ofSafe("anti-xray - obfuscate");
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+ public static final Timing distanceManagerTick = Timings.ofSafe("Distance Manager Tick"); // Paper - add timings for distance manager
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public static final Timing midTickChunkTasks = Timings.ofSafe("Mid Tick Chunk Tasks");
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diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
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index e28e083373261ab9fa3b015e294ee9f81b4d2f6e..192b52cb3205ea6bbf45bde9bc50324ad9815463 100644
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--- a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
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+++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java
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@@ -901,7 +901,9 @@ public final class ChunkHolderManager {
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}
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public boolean processTicketUpdates() {
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+ co.aikar.timings.MinecraftTimings.distanceManagerTick.startTiming(); try { // Paper - add timings for distance manager
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return this.processTicketUpdates(true, true, null);
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+ } finally { co.aikar.timings.MinecraftTimings.distanceManagerTick.stopTiming(); } // Paper - add timings for distance manager
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}
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private static final ThreadLocal<List<ChunkProgressionTask>> CURRENT_TICKET_UPDATE_SCHEDULING = new ThreadLocal<>();
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