Add BitmapIterationBenchmark and update to JMH 1.17.2 (#3751)

This commit is contained in:
Roman Leventov 2016-12-07 17:50:33 -06:00 committed by Fangjin Yang
parent 949e65165c
commit d9807835f9
2 changed files with 283 additions and 1 deletions

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<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jmh.version>1.9.2</jmh.version>
<jmh.version>1.17.2</jmh.version>
<javac.target>1.7</javac.target>
<uberjar.name>benchmarks</uberjar.name>
</properties>

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package io.druid.benchmark;
import io.druid.collections.bitmap.BitSetBitmapFactory;
import io.druid.collections.bitmap.BitmapFactory;
import io.druid.collections.bitmap.ConciseBitmapFactory;
import io.druid.collections.bitmap.ImmutableBitmap;
import io.druid.collections.bitmap.MutableBitmap;
import io.druid.collections.bitmap.RoaringBitmapFactory;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.roaringbitmap.IntIterator;
import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
/**
* Benchmarks of bitmap iteration and iteration + something (cumulative cost), the latter is useful for comparing total
* "usage cost" of different {@link io.druid.segment.data.BitmapSerdeFactory}.
*
* @see #iter(IterState)
* @see #constructAndIter(ConstructAndIterState)
* @see #intersectionAndIter(BitmapsForIntersection)
* @see #unionAndIter(BitmapsForUnion)
*/
@State(Scope.Benchmark)
@Fork(1)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
public class BitmapIterationBenchmark
{
@Param({"bitset", "concise", "roaring"})
public String bitmapAlgo;
/**
* Fraction of set bits in the bitmaps to iterate. For {@link #intersectionAndIter} and
* {@link #unionAndIter}, this is the fraction of set bits in the final result of intersection or union.
*/
@Param({"0.0", "0.001", "0.1", "0.5", "0.99", "1.0"})
public double prob;
/**
* The size of all bitmaps, i. e. the number of rows in a segment for the most bitmap use cases.
*/
@Param({"1000000"})
public int size;
private BitmapFactory makeFactory() {
switch (bitmapAlgo) {
case "bitset":
return new BitSetBitmapFactory();
case "concise":
return new ConciseBitmapFactory();
case "roaring":
return new RoaringBitmapFactory();
default:
throw new IllegalStateException();
}
}
private BitmapFactory factory;
@Setup
public void setup()
{
factory = makeFactory();
}
private ImmutableBitmap makeBitmap(double prob)
{
MutableBitmap mutableBitmap = factory.makeEmptyMutableBitmap();
Random random = ThreadLocalRandom.current();
for (int bit = 0; bit < size; bit++) {
if (random.nextDouble() < prob) {
mutableBitmap.add(bit);
}
}
return factory.makeImmutableBitmap(mutableBitmap);
}
@State(Scope.Benchmark)
public static class IterState
{
private ImmutableBitmap bitmap;
@Setup
public void setup(BitmapIterationBenchmark state)
{
bitmap = state.makeBitmap(state.prob);
}
}
/**
* General benchmark of bitmap iteration, this is a part of {@link io.druid.segment.IndexMerger#merge} and
* query processing on both realtime and historical nodes.
*/
@Benchmark
public int iter(IterState state)
{
ImmutableBitmap bitmap = state.bitmap;
return iter(bitmap);
}
private static int iter(ImmutableBitmap bitmap)
{
int consume = 0;
for (IntIterator it = bitmap.iterator(); it.hasNext();) {
consume ^= it.next();
}
return consume;
}
@State(Scope.Benchmark)
public static class ConstructAndIterState
{
private int dataSize;
private int[] data;
@Setup
public void setup(BitmapIterationBenchmark state)
{
data = new int[(int) (state.size * state.prob) * 2];
dataSize = 0;
Random random = ThreadLocalRandom.current();
for (int bit = 0; bit < state.size; bit++) {
if (random.nextDouble() < state.prob) {
data[dataSize] = bit;
dataSize++;
}
}
}
}
/**
* Benchmark of cumulative cost of construction of an immutable bitmap and then iterating over it. This is a pattern
* from realtime nodes, see {@link io.druid.segment.StringDimensionIndexer#fillBitmapsFromUnsortedEncodedArray}.
* However this benchmark is yet approximate and to be improved to better reflect actual workloads of realtime nodes.
*/
@Benchmark
public int constructAndIter(ConstructAndIterState state)
{
int dataSize = state.dataSize;
int[] data = state.data;
MutableBitmap mutableBitmap = factory.makeEmptyMutableBitmap();
for (int i = 0; i < dataSize; i++) {
mutableBitmap.add(data[i]);
}
ImmutableBitmap bitmap = factory.makeImmutableBitmap(mutableBitmap);
return iter(bitmap);
}
@State(Scope.Benchmark)
public static class BitmapsForIntersection
{
/**
* Number of bitmaps to intersect.
*/
@Param({"2", "10", "100"})
public int n;
private ImmutableBitmap[] bitmaps;
@Setup
public void setup(BitmapIterationBenchmark state)
{
// prob of intersection = product (probs of intersected bitmaps), prob = intersectedBitmapProb ^ n
double intersectedBitmapProb = Math.pow(state.prob, 1.0 / n);
bitmaps = new ImmutableBitmap[n];
for (int i = 0; i < n; i++) {
bitmaps[i] = state.makeBitmap(intersectedBitmapProb);
}
}
}
/**
* Benchmark of cumulative cost of bitmap intersection with subsequent iteration over the result. This is a pattern
* from query processing of historical nodes, when {@link io.druid.segment.filter.AndFilter} is used.
*/
@Benchmark
public int intersectionAndIter(BitmapsForIntersection state)
{
ImmutableBitmap intersection = factory.intersection(Arrays.asList(state.bitmaps));
return iter(intersection);
}
@State(Scope.Benchmark)
public static class BitmapsForUnion
{
/**
* Number of bitmaps to union.
*/
@Param({"2", "10", "100"})
public int n;
private ImmutableBitmap[] bitmaps;
@Setup
public void setup(BitmapIterationBenchmark state)
{
double prob = Math.pow(state.prob, 1.0 / n);
MutableBitmap[] mutableBitmaps = new MutableBitmap[n];
for (int i = 0; i < n; i++) {
mutableBitmaps[i] = state.factory.makeEmptyMutableBitmap();
}
Random r = ThreadLocalRandom.current();
for (int i = 0; i < state.size; i++) {
// unions are usually search/filter/select of multiple values of one dimension, so making bitmaps disjoint will
// make benchmarks closer to actual workloads
MutableBitmap bitmap = mutableBitmaps[r.nextInt(n)];
// In one selected bitmap, set the bit with probability=prob, to have the same fraction of set bit in the union
if (r.nextDouble() < prob) {
bitmap.add(i);
}
}
bitmaps = new ImmutableBitmap[n];
for (int i = 0; i < n; i++) {
bitmaps[i] = state.factory.makeImmutableBitmap(mutableBitmaps[i]);
}
}
}
/**
* Benchmark of cumulative cost of bitmap union with subsequent iteration over the result. This is a pattern from
* query processing on historical nodes, when filters like {@link io.druid.segment.filter.DimensionPredicateFilter},
* {@link io.druid.query.filter.RegexDimFilter}, {@link io.druid.query.filter.SearchQueryDimFilter} and similar are
* used.
*/
@Benchmark
public int unionAndIter(BitmapsForUnion state)
{
ImmutableBitmap intersection = factory.union(Arrays.asList(state.bitmaps));
return iter(intersection);
}
/**
* This main() is for debugging from the IDE.
*/
public static void main(String[] args)
{
BitmapIterationBenchmark state = new BitmapIterationBenchmark();
state.bitmapAlgo = "concise";
state.prob = 0.001;
state.size = 1000000;
state.setup();
BitmapsForIntersection state2 = new BitmapsForIntersection();
state2.setup(state);
state.intersectionAndIter(state2);
}
}