| /* |
| * 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.cassandra.test.microbench; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import io.netty.util.concurrent.FastThreadLocal; |
| 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.State; |
| import org.openjdk.jmh.annotations.Threads; |
| import org.openjdk.jmh.annotations.Warmup; |
| import org.openjdk.jmh.infra.Blackhole; |
| |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS) |
| @Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS) |
| @Fork(value = 1, jvmArgsAppend = {"-Xmx512M", "-Djmh.executor=CUSTOM", "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor"}) |
| @Threads(4) // make sure this matches the number of _physical_cores_ |
| @State(Scope.Benchmark) |
| public class FastThreadLocalBench |
| { |
| @Param({"2", "4", "8", "12"}) |
| private int variables = 2; |
| |
| static final int max = 20; |
| static final ThreadLocal[] threadLocals = new ThreadLocal[max]; |
| static final FastThreadLocal[] fastThreadLocals = new FastThreadLocal[max]; |
| static |
| { |
| for (int i = 0; i < max; i++) |
| { |
| threadLocals[i] = ThreadLocal.withInitial(Object::new); |
| fastThreadLocals[i] = new FastThreadLocal() { |
| protected Object initialValue() throws Exception |
| { |
| return new Object(); |
| } |
| }; |
| } |
| } |
| |
| @State(Scope.Thread) |
| public static class FastThreadLocalBenchState |
| { |
| public int index; |
| } |
| |
| @Benchmark |
| public void baseline(FastThreadLocalBenchState state, Blackhole bh) |
| { |
| if (variables != 2) |
| throw new IllegalArgumentException("skipped"); |
| |
| bh.consume("foo"); |
| } |
| |
| @Benchmark |
| public void threadLocal(FastThreadLocalBenchState state, Blackhole bh) |
| { |
| bh.consume(threadLocals[state.index % max].get()); |
| } |
| |
| @Benchmark |
| public void fastThreadLocal(FastThreadLocalBenchState state, Blackhole bh) |
| { |
| bh.consume(fastThreadLocals[state.index % max].get()); |
| } |
| } |