456 lines
21 KiB
Diff
456 lines
21 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: Sun, 20 Jun 2021 16:19:26 -0700
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Subject: [PATCH] Optimise random block ticking
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Massive performance improvement for random block ticking.
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The performance increase comes from the fact that the vast
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majority of attempted block ticks (~95% in my testing) fail
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because the randomly selected block is not tickable.
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Now only tickable blocks are targeted, however this means that
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the maximum number of block ticks occurs per chunk. However,
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not all chunks are going to be targeted. The percent chance
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of a chunk being targeted is based on how many tickable blocks
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are in the chunk.
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This means that while block ticks are spread out less, the
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total number of blocks ticked per world tick remains the same.
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Therefore, the chance of a random tickable block being ticked
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remains the same.
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diff --git a/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java b/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..7d93652c1abbb6aee6eb7c26cf35d4d032ef7b69
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java
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@@ -0,0 +1,65 @@
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+package io.papermc.paper.util.math;
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+
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+import net.minecraft.util.RandomSource;
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+import net.minecraft.world.level.levelgen.LegacyRandomSource;
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+import net.minecraft.world.level.levelgen.PositionalRandomFactory;
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+import org.checkerframework.checker.nullness.qual.NonNull;
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+import org.checkerframework.framework.qual.DefaultQualifier;
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+
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+@DefaultQualifier(NonNull.class)
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+public final class ThreadUnsafeRandom extends LegacyRandomSource {
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+
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+ // See javadoc and internal comments for java.util.Random where these values come from, how they are used, and the author for them.
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+ private static final long multiplier = 0x5DEECE66DL;
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+ private static final long addend = 0xBL;
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+ private static final long mask = (1L << 48) - 1;
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+
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+ private static long initialScramble(long seed) {
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+ return (seed ^ multiplier) & mask;
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+ }
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+
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+ private long seed;
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+
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+ public ThreadUnsafeRandom(long seed) {
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+ super(seed);
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+ }
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+
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+ @Override
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+ public RandomSource fork() {
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+ return new ThreadUnsafeRandom(this.nextLong());
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+ }
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+
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+ @Override
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+ public PositionalRandomFactory forkPositional() {
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+ throw new UnsupportedOperationException();
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+ }
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+
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+ @Override
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+ public void setSeed(long seed) {
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+ // note: called by Random constructor
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+ this.seed = initialScramble(seed);
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+ }
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+
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+ @Override
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+ public int next(int bits) {
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+ // avoid the expensive CAS logic used by superclass
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+ return (int) (((this.seed = this.seed * multiplier + addend) & mask) >>> (48 - bits));
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+ }
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+
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+ // Taken from
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+ // https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
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+ // https://github.com/lemire/Code-used-on-Daniel-Lemire-s-blog/blob/master/2016/06/25/fastrange.c
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+ // Original license is public domain
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+ public static int fastRandomBounded(final long randomInteger, final long limit) {
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+ // randomInteger must be [0, pow(2, 32))
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+ // limit must be [0, pow(2, 32))
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+ return (int)((randomInteger * limit) >>> 32);
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+ }
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+
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+ @Override
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+ public int nextInt(int bound) {
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+ // yes this breaks random's spec
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+ // however there's nothing that uses this class that relies on it
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+ return fastRandomBounded(this.next(32) & 0xFFFFFFFFL, bound);
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
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index 160d340b6b9a054091897a728e4dbc73bb62ab96..9d18da228c6709e7665ba8babb6ee6d0b36b5dc5 100644
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--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
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+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
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@@ -855,6 +855,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
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entityplayer.stopSleepInBed(false, false);
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});
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}
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+ // Paper start - optimise random block ticking
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+ private final BlockPos.MutableBlockPos chunkTickMutablePosition = new BlockPos.MutableBlockPos();
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+ private final io.papermc.paper.util.math.ThreadUnsafeRandom randomTickRandom = new io.papermc.paper.util.math.ThreadUnsafeRandom(this.random.nextLong());
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+ // Paper end
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public void tickChunk(LevelChunk chunk, int randomTickSpeed) {
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ChunkPos chunkcoordintpair = chunk.getPos();
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@@ -864,8 +868,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
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ProfilerFiller gameprofilerfiller = this.getProfiler();
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gameprofilerfiller.push("thunder");
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+ final BlockPos.MutableBlockPos blockposition = this.chunkTickMutablePosition; // Paper - use mutable to reduce allocation rate, final to force compile fail on change
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+
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if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && this.random.nextInt(this.spigotConfig.thunderChance) == 0) { // Spigot // Paper - Option to disable thunder
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- BlockPos blockposition = this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15));
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+ blockposition.set(this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15))); // Paper
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if (this.isRainingAt(blockposition)) {
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DifficultyInstance difficultydamagescaler = this.getCurrentDifficultyAt(blockposition);
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@@ -897,7 +903,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
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if (!this.paperConfig().environment.disableIceAndSnow) { // Paper - Option to disable ice and snow
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for (int l = 0; l < randomTickSpeed; ++l) {
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if (this.random.nextInt(48) == 0) {
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- this.tickPrecipitation(this.getBlockRandomPos(j, 0, k, 15));
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+ // Paper start
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+ this.getRandomBlockPosition(j, 0, k, 15, blockposition);
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+ this.tickPrecipitation(blockposition, chunk);
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+ // Paper end
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}
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}
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} // Paper - Option to disable ice and snow
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@@ -905,36 +914,37 @@ public class ServerLevel extends Level implements WorldGenLevel {
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gameprofilerfiller.popPush("tickBlocks");
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timings.chunkTicksBlocks.startTiming(); // Paper
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if (randomTickSpeed > 0) {
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- LevelChunkSection[] achunksection = chunk.getSections();
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-
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- for (int i1 = 0; i1 < achunksection.length; ++i1) {
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- LevelChunkSection chunksection = achunksection[i1];
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-
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- if (chunksection.isRandomlyTicking()) {
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- int j1 = chunk.getSectionYFromSectionIndex(i1);
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- int k1 = SectionPos.sectionToBlockCoord(j1);
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-
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- for (int l1 = 0; l1 < randomTickSpeed; ++l1) {
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- BlockPos blockposition1 = this.getBlockRandomPos(j, k1, k, 15);
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-
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- gameprofilerfiller.push("randomTick");
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- BlockState iblockdata = chunksection.getBlockState(blockposition1.getX() - j, blockposition1.getY() - k1, blockposition1.getZ() - k);
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-
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- if (iblockdata.isRandomlyTicking()) {
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- iblockdata.randomTick(this, blockposition1, this.random);
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- }
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+ // Paper start - optimize random block ticking
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+ LevelChunkSection[] sections = chunk.getSections();
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+ final int minSection = io.papermc.paper.util.WorldUtil.getMinSection(this);
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+ for (int sectionIndex = 0; sectionIndex < sections.length; sectionIndex++) {
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+ LevelChunkSection section = sections[sectionIndex];
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+ if (section == null || section.tickingList.size() == 0) continue;
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+
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+ int yPos = (sectionIndex + minSection) << 4;
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+ for (int a = 0; a < randomTickSpeed; ++a) {
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+ int tickingBlocks = section.tickingList.size();
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+ int index = this.randomTickRandom.nextInt(16 * 16 * 16);
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+ if (index >= tickingBlocks) {
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+ continue;
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+ }
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- FluidState fluid = iblockdata.getFluidState();
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+ long raw = section.tickingList.getRaw(index);
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+ int location = com.destroystokyo.paper.util.maplist.IBlockDataList.getLocationFromRaw(raw);
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+ int randomX = location & 15;
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+ int randomY = ((location >>> (4 + 4)) & 255) | yPos;
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+ int randomZ = (location >>> 4) & 15;
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- if (fluid.isRandomlyTicking()) {
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- fluid.randomTick(this, blockposition1, this.random);
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- }
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+ BlockPos blockposition2 = blockposition.set(j + randomX, randomY, k + randomZ);
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+ BlockState iblockdata = com.destroystokyo.paper.util.maplist.IBlockDataList.getBlockDataFromRaw(raw);
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- gameprofilerfiller.pop();
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- }
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+ iblockdata.randomTick(this, blockposition2, this.randomTickRandom);
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}
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+ // We drop the fluid tick since LAVA is ALREADY TICKED by the above method (See LiquidBlock).
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+ // TODO CHECK ON UPDATE (ping the Canadian)
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}
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}
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+ // Paper end - optimise random block ticking
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timings.chunkTicksBlocks.stopTiming(); // Paper
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gameprofilerfiller.pop();
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@@ -942,17 +952,25 @@ public class ServerLevel extends Level implements WorldGenLevel {
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@VisibleForTesting
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public void tickPrecipitation(BlockPos pos) {
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- BlockPos blockposition1 = this.getHeightmapPos(Heightmap.Types.MOTION_BLOCKING, pos);
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- BlockPos blockposition2 = blockposition1.below();
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+ // Paper start - optimise chunk ticking
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+ tickPrecipitation(pos.mutable(), this.getChunkAt(pos));
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+ }
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+ public void tickPrecipitation(BlockPos.MutableBlockPos blockposition1, final LevelChunk chunk) {
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+ int normalY = chunk.getHeight(Heightmap.Types.MOTION_BLOCKING, blockposition1.getX() & 15, blockposition1.getZ() & 15) + 1;
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+ int downY = normalY - 1;
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+ blockposition1.setY(normalY);
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+ // Paper end - optimise chunk ticking
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Biome biomebase = (Biome) this.getBiome(blockposition1).value();
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- if (biomebase.shouldFreeze(this, blockposition2)) {
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- org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this, blockposition2, Blocks.ICE.defaultBlockState(), null); // CraftBukkit
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+ blockposition1.setY(downY);
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+ if (biomebase.shouldFreeze(this, blockposition1)) {
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+ org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this, blockposition1, Blocks.ICE.defaultBlockState(), null); // CraftBukkit
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}
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if (this.isRaining()) {
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int i = this.getGameRules().getInt(GameRules.RULE_SNOW_ACCUMULATION_HEIGHT);
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+ blockposition1.setY(normalY); // Paper - optimise chunk ticking
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if (i > 0 && biomebase.shouldSnow(this, blockposition1)) {
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BlockState iblockdata = this.getBlockState(blockposition1);
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@@ -970,12 +988,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
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}
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}
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- Biome.Precipitation biomebase_precipitation = biomebase.getPrecipitationAt(blockposition2);
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+ blockposition1.setY(downY); // Paper - optimise chunk ticking
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+ Biome.Precipitation biomebase_precipitation = biomebase.getPrecipitationAt(blockposition1); // Paper - optimise chunk ticking
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if (biomebase_precipitation != Biome.Precipitation.NONE) {
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- BlockState iblockdata2 = this.getBlockState(blockposition2);
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+ BlockState iblockdata2 = this.getBlockState(blockposition1); // Paper - optimise chunk ticking
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- iblockdata2.getBlock().handlePrecipitation(iblockdata2, this, blockposition2, biomebase_precipitation);
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+ iblockdata2.getBlock().handlePrecipitation(iblockdata2, this, blockposition1, biomebase_precipitation); // Paper - optimise chunk ticking
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}
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}
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diff --git a/src/main/java/net/minecraft/util/BitStorage.java b/src/main/java/net/minecraft/util/BitStorage.java
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index 68648c5a5e3ff079f832092af0f2f801c42d1ede..8bafd5fd7499ba4a04bf706cfd1e156073716e21 100644
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--- a/src/main/java/net/minecraft/util/BitStorage.java
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+++ b/src/main/java/net/minecraft/util/BitStorage.java
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@@ -20,4 +20,15 @@ public interface BitStorage {
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void unpack(int[] out);
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BitStorage copy();
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+
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+ // Paper start
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+ void forEach(DataBitConsumer consumer);
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+
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+ @FunctionalInterface
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+ interface DataBitConsumer {
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+
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+ void accept(int location, int data);
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+
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+ }
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+ // Paper end
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}
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diff --git a/src/main/java/net/minecraft/util/SimpleBitStorage.java b/src/main/java/net/minecraft/util/SimpleBitStorage.java
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index 9f438d9c6eb05e43d24e4af68188a3d4c46a938c..8d7d763bf51cac556057645e6169c9447993189b 100644
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--- a/src/main/java/net/minecraft/util/SimpleBitStorage.java
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+++ b/src/main/java/net/minecraft/util/SimpleBitStorage.java
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@@ -315,6 +315,28 @@ public class SimpleBitStorage implements BitStorage {
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return this.bits;
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}
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+ // Paper start
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+ @Override
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+ public final void forEach(DataBitConsumer consumer) {
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+ int i = 0;
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+ long[] along = this.data;
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+ int j = along.length;
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+
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+ for (int k = 0; k < j; ++k) {
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+ long l = along[k];
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+
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+ for (int i1 = 0; i1 < this.valuesPerLong; ++i1) {
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+ consumer.accept(i, (int) (l & this.mask));
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+ l >>= this.bits;
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+ ++i;
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+ if (i >= this.size) {
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+ return;
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+ }
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+ }
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+ }
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+ }
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+ // Paper end
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+
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@Override
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public void getAll(IntConsumer action) {
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int i = 0;
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diff --git a/src/main/java/net/minecraft/util/ZeroBitStorage.java b/src/main/java/net/minecraft/util/ZeroBitStorage.java
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index 50040c497a819cd1229042ab3cb057d34a32cacc..01f5b946fabbe34f31110e75973dab9f39897346 100644
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--- a/src/main/java/net/minecraft/util/ZeroBitStorage.java
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+++ b/src/main/java/net/minecraft/util/ZeroBitStorage.java
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@@ -46,6 +46,15 @@ public class ZeroBitStorage implements BitStorage {
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return 0;
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}
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+ // Paper start
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+ @Override
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+ public void forEach(DataBitConsumer consumer) {
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+ for(int i = 0; i < this.size; ++i) {
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+ consumer.accept(i, 0);
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+ }
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+ }
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+ // Paper end
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+
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@Override
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public void getAll(IntConsumer action) {
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for (int i = 0; i < this.size; i++) {
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Turtle.java b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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index 6a98f66b7701e8af389ca9a1e9eb230a6100c838..dbdb6c432448b151fa4421f14235f8bad23dc720 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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@@ -87,7 +87,7 @@ public class Turtle extends Animal {
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}
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public void setHomePos(BlockPos pos) {
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- this.entityData.set(Turtle.HOME_POS, pos);
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+ this.entityData.set(Turtle.HOME_POS, pos.immutable()); // Paper - called with mutablepos...
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}
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public BlockPos getHomePos() {
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index e64431d524f83897d8ff7f5adc27ddef58cd46df..47e83adf64df673bc40077335baf786f865411e8 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -1395,10 +1395,18 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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public abstract RecipeManager getRecipeManager();
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public BlockPos getBlockRandomPos(int x, int y, int z, int l) {
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+ // Paper start - allow use of mutable pos
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+ BlockPos.MutableBlockPos ret = new BlockPos.MutableBlockPos();
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+ this.getRandomBlockPosition(x, y, z, l, ret);
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+ return ret.immutable();
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+ }
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+ public final BlockPos.MutableBlockPos getRandomBlockPosition(int x, int y, int z, int l, BlockPos.MutableBlockPos out) {
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+ // Paper end
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this.randValue = this.randValue * 3 + 1013904223;
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int i1 = this.randValue >> 2;
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- return new BlockPos(x + (i1 & 15), y + (i1 >> 16 & l), z + (i1 >> 8 & 15));
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+ out.set(x + (i1 & 15), y + (i1 >> 16 & l), z + (i1 >> 8 & 15)); // Paper - change to setValues call
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+ return out; // Paper
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}
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public boolean noSave() {
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diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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index 8852263cb6faec1b68326145aa30e5cd36d066e7..eb05c01e85825cbd5b7cf43bc6d261db0b871b92 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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@@ -25,6 +25,7 @@ public class LevelChunkSection {
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public final PalettedContainer<BlockState> states;
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// CraftBukkit start - read/write
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private PalettedContainer<Holder<Biome>> biomes;
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+ public final com.destroystokyo.paper.util.maplist.IBlockDataList tickingList = new com.destroystokyo.paper.util.maplist.IBlockDataList(); // Paper
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public LevelChunkSection(PalettedContainer<BlockState> datapaletteblock, PalettedContainer<Holder<Biome>> palettedcontainerro) {
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// CraftBukkit end
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@@ -77,6 +78,9 @@ public class LevelChunkSection {
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--this.nonEmptyBlockCount;
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if (iblockdata1.isRandomlyTicking()) {
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--this.tickingBlockCount;
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+ // Paper start
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+ this.tickingList.remove(x, y, z);
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+ // Paper end
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}
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}
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@@ -88,6 +92,9 @@ public class LevelChunkSection {
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++this.nonEmptyBlockCount;
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if (state.isRandomlyTicking()) {
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++this.tickingBlockCount;
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+ // Paper start
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+ this.tickingList.add(x, y, z, state);
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+ // Paper end
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}
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}
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@@ -115,40 +122,34 @@ public class LevelChunkSection {
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}
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public void recalcBlockCounts() {
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- class a implements PalettedContainer.CountConsumer<BlockState> {
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-
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- public int nonEmptyBlockCount;
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- public int tickingBlockCount;
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- public int tickingFluidCount;
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-
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- a() {}
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-
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- public void accept(BlockState iblockdata, int i) {
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+ // Paper start - unfuck this
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+ this.tickingList.clear();
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+ this.nonEmptyBlockCount = 0;
|
|
+ this.tickingBlockCount = 0;
|
|
+ this.tickingFluidCount = 0;
|
|
+ // Don't run this on clearly empty sections
|
|
+ if (this.maybeHas((BlockState state) -> !state.isAir() || !state.getFluidState().isEmpty())) {
|
|
+ this.states.forEachLocation((BlockState iblockdata, int i) -> {
|
|
FluidState fluid = iblockdata.getFluidState();
|
|
|
|
if (!iblockdata.isAir()) {
|
|
- this.nonEmptyBlockCount += i;
|
|
+ this.nonEmptyBlockCount = (short) (this.nonEmptyBlockCount + 1);
|
|
if (iblockdata.isRandomlyTicking()) {
|
|
- this.tickingBlockCount += i;
|
|
+ this.tickingBlockCount = (short)(this.tickingBlockCount + 1);
|
|
+ this.tickingList.add(i, iblockdata);
|
|
}
|
|
}
|
|
|
|
if (!fluid.isEmpty()) {
|
|
- this.nonEmptyBlockCount += i;
|
|
+ this.nonEmptyBlockCount = (short) (this.nonEmptyBlockCount + 1);
|
|
if (fluid.isRandomlyTicking()) {
|
|
- this.tickingFluidCount += i;
|
|
+ this.tickingFluidCount = (short) (this.tickingFluidCount + 1);
|
|
}
|
|
}
|
|
|
|
- }
|
|
+ });
|
|
}
|
|
-
|
|
- a a0 = new a();
|
|
-
|
|
- this.states.count(a0);
|
|
- this.nonEmptyBlockCount = (short) a0.nonEmptyBlockCount;
|
|
- this.tickingBlockCount = (short) a0.tickingBlockCount;
|
|
- this.tickingFluidCount = (short) a0.tickingFluidCount;
|
|
+ // Paper end
|
|
}
|
|
|
|
public PalettedContainer<BlockState> getStates() {
|
|
diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
index d473637a705c1f11079fff08e334545779a99a84..adfbdca12fbdee2602feb0158674166d5256e49e 100644
|
|
--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
|
|
@@ -381,6 +381,14 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
|
|
}
|
|
}
|
|
|
|
+ // Paper start
|
|
+ public void forEachLocation(PalettedContainer.CountConsumer<T> consumer) {
|
|
+ this.data.storage.forEach((int location, int data) -> {
|
|
+ consumer.accept(this.data.palette.valueFor(data), location);
|
|
+ });
|
|
+ }
|
|
+ // Paper end
|
|
+
|
|
@FunctionalInterface
|
|
public interface CountConsumer<T> {
|
|
void accept(T object, int count);
|