| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 org.apache.ignite.internal.benchmarks.jmh.misc; |
| |
| import java.util.concurrent.atomic.AtomicLong; |
| import org.apache.ignite.internal.benchmarks.jmh.JmhAbstractBenchmark; |
| import org.apache.ignite.internal.benchmarks.jmh.runner.JmhIdeBenchmarkRunner; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.State; |
| |
| /** |
| * Test various increment strategies. |
| */ |
| @State(Scope.Benchmark) |
| public class JmhIncrementBenchmark extends JmhAbstractBenchmark { |
| /** Batch size. */ |
| private static final int BATCH_SIZE = 1024; |
| |
| /** Thread-local value. */ |
| private static final ThreadLocal<Long> VAL = new ThreadLocal<Long>() { |
| @Override protected Long initialValue() { |
| return 0L; |
| } |
| }; |
| |
| /** Atomic variable. */ |
| private final AtomicLong atomic = new AtomicLong(); |
| |
| /** |
| * Test standard increment. |
| */ |
| @Benchmark |
| public long increment() { |
| return atomic.incrementAndGet(); |
| } |
| |
| /** |
| * Test increment with thread-local batching. |
| */ |
| @Benchmark |
| public long threadLocalIncrement() { |
| long val = VAL.get(); |
| |
| if ((val & (BATCH_SIZE - 1)) == 0) |
| val = atomic.addAndGet(BATCH_SIZE); |
| |
| VAL.set(++val); |
| |
| return val; |
| } |
| |
| /** |
| * Run benchmarks. |
| * |
| * @param args Arguments. |
| * @throws Exception If failed. |
| */ |
| public static void main(String[] args) throws Exception { |
| run(8); |
| } |
| |
| /** |
| * Run benchmark. |
| * |
| * @param threads Amount of threads. |
| * @throws Exception If failed. |
| */ |
| private static void run(int threads) throws Exception { |
| JmhIdeBenchmarkRunner.create() |
| .forks(1) |
| .threads(threads) |
| .warmupIterations(30) |
| .measurementIterations(30) |
| .benchmarks(JmhIncrementBenchmark.class.getSimpleName()) |
| .jvmArguments("-Xms4g", "-Xmx4g") |
| .run(); |
| } |
| } |