1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
|
package org.openjdk.jmh.samples;
import org.openjdk.jmh.annotations.*; import org.openjdk.jmh.runner.Runner; import org.openjdk.jmh.runner.RunnerException; import org.openjdk.jmh.runner.options.Options; import org.openjdk.jmh.runner.options.OptionsBuilder;
import java.util.concurrent.*;
@OutputTimeUnit(TimeUnit.MICROSECONDS) public class JMHSample_07_FixtureLevelInvocation {
@State(Scope.Benchmark) public static class NormalState { ExecutorService service;
@Setup(Level.Trial) public void up() { service = Executors.newCachedThreadPool(); }
@TearDown(Level.Trial) public void down() { service.shutdown(); }
}
public static class LaggingState extends NormalState { public static final int SLEEP_TIME = Integer.getInteger("sleepTime", 10);
@Setup(Level.Invocation) public void lag() throws InterruptedException { TimeUnit.MILLISECONDS.sleep(SLEEP_TIME); } }
@Benchmark @BenchmarkMode(Mode.AverageTime) public double measureHot(NormalState e, final Scratch s) throws ExecutionException, InterruptedException { return e.service.submit(new Task(s)).get(); }
@Benchmark @BenchmarkMode(Mode.AverageTime) public double measureCold(LaggingState e, final Scratch s) throws ExecutionException, InterruptedException { return e.service.submit(new Task(s)).get(); }
@State(Scope.Thread) public static class Scratch { private double p; public double doWork() { p = Math.log(p); return p; } }
public static class Task implements Callable<Double> { private Scratch s;
public Task(Scratch s) { this.s = s; }
@Override public Double call() { return s.doWork(); } }
public static void main(String[] args) throws RunnerException { Options opt = new OptionsBuilder() .include(JMHSample_07_FixtureLevelInvocation.class.getSimpleName()) .forks(1) .build();
new Runner(opt).run(); }
}
|