118 lines
3.6 KiB
Java
118 lines
3.6 KiB
Java
/*
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* Copyright 2020 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.buffer.api.memseg.benchmarks;
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import io.netty.buffer.api.Buffer;
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import io.netty.buffer.api.BufferAllocator;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.TearDown;
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import org.openjdk.jmh.annotations.Warmup;
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import java.util.concurrent.TimeUnit;
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@Warmup(iterations = 5, time = 1500, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
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@Fork(1)
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Benchmark)
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public class MemSegBufAccessBenchmark {
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public enum BBufType {
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DIRECT {
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@Override
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Buffer newBuffer() {
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return BufferAllocator.offHeapUnpooled().allocate(64);
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}
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},
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HEAP {
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@Override
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Buffer newBuffer() {
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return BufferAllocator.onHeapUnpooled().allocate(64);
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}
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},
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// COMPOSITE {
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// @Override
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// Buffer newBuffer() {
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// return Unpooled.wrappedBuffer(UNSAFE.newBuffer(), HEAP.newBuffer());
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// }
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// },
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// NIO {
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// @Override
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// Buffer newBuffer() {
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// return new NioFacade(BBuffer.allocateDirect(64));
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// }
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// }
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;
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abstract Buffer newBuffer();
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}
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@Param
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public BBufType bufferType;
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@Param("8")
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public int batchSize; // applies only to readBatch benchmark
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@Setup
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public void setup() {
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buffer = bufferType.newBuffer();
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buffer.writerOffset(batchSize);
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}
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private Buffer buffer;
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@TearDown
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public void tearDown() {
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buffer.close();
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}
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@Benchmark
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public long setGetLong() {
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return buffer.setLong(0, 1).getLong(0);
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}
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@Benchmark
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public Buffer setLong() {
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return buffer.setLong(0, 1);
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}
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@Benchmark
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public int readBatch() {
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buffer.readerOffset(0);
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int result = 0;
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// WARNING!
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// Please do not replace this sum loop with a BlackHole::consume loop:
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// BlackHole::consume could prevent the JVM to perform certain optimizations
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// forcing ByteBuf::readByte to be executed in order.
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// The purpose of the benchmark is to mimic accesses on ByteBuf
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// as in a real (single-threaded) case ie without (compiler) memory barriers that would
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// disable certain optimizations or would make bounds checks (if enabled)
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// to happen on each access.
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for (int i = 0, size = batchSize; i < size; i++) {
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result += buffer.readByte();
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}
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return result;
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}
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}
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