JMH脚本->，例如集迭代(5)

Question

当我开始我的基准测试时，我将只有5 warmupInterations，5 measurementIterations和只有1叉。我不想使用命令行选项！

**my test code in Eclipse:**

package org.sample;

import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
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;

public class MyBenchmark {

    @Benchmark @BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS)
    public String[] testMethod() {
        return "1,2,3,4,5,6,7,8,9,10".split(",");
    }


    public static void main(String[] args) throws RunnerException {
        Options opt = new OptionsBuilder()
                .include(MyBenchmark.class.getSimpleName())
                .warmupIterations(5)
                .measurementIterations(5)
                .forks(1)
                .build();

        new Runner(opt).run();
    }

}

然后我说

mvn clean install
java -jar benchmark.jar

我得到的输出和往常一样(没有改变的迭代或分叉！)

C:\Users\SPARK\Desktop\workspace\jmhBenchmark\target>java -jar benchmarks.jar
# JMH 1.11.3 (released 68 days ago)
# VM version: JDK 1.8.0_74, VM 25.74-b02
# VM invoker: C:\Program Files\Java\jre1.8.0_74\bin\java.exe
# VM options: <none>
# Warmup: 20 iterations, 1 s each
# Measurement: 20 iterations, 1 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: org.sample.MyBenchmark.testMethod

# Run progress: 0,00% complete, ETA 00:06:40
# Fork: 1 of 10
# Warmup Iteration   1: 2108087,328 ops/s
# Warmup Iteration   2: 2435219,249 ops/s
# Warmup Iteration   3: 2589289,173 ops/s
# Warmup Iteration   4: 2606293,767 ops/s
# Warmup Iteration   5: 2548095,405 ops/s
# Warmup Iteration   6: 2594874,969 ops/s
# Warmup Iteration   7: 2583629,760 ops/s
# Warmup Iteration   8: 2579041,971 ops/s
# Warmup Iteration   9: 2580402,155 ops/s
# Warmup Iteration  10: 2546640,733 ops/s
# Warmup Iteration  11: 2580002,548 ops/s
# Warmup Iteration  12:

我做错什么了?？

非常感谢你的阅读

Answer 1

通过执行java -jar benchmark.jar，使用默认的JMH设置执行测试。

如果要使用OptionsBuilder指定的设置运行测试，请执行以下操作。您必须以java -cp benchmark.jar org.sample.MyBenchmark的身份运行它。

在下面找到一个完整的例子。

mvn archetype:generate \
    -DarchetypeGroupId=org.openjdk.jmh \
    -DarchetypeArtifactId=jmh-java-benchmark-archetype \
    -DgroupId=org.sample \
    -DartifactId=jmh-example \
    -Dversion=0.0.1 \
    -DinteractiveMode=false 

用源代码替换文件src/main/java/org/sample/MyBenchmark.java。

执行java -jar target/benchamrks.jar使用下列设置

# VM options: <none>
# Warmup: 20 iterations, 1 s each
# Measurement: 20 iterations, 1 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: org.sample.MyBenchmark.testMethod
...
# Fork: 1 of 10

执行java -cp target/benchmarks.jar org.sample.MyBenchmark使用下列设置

# VM options: <none>
# Warmup: 5 iterations, 1 s each
# Measurement: 5 iterations, 1 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: org.sample.MyBenchmark.testMethod
...
# Fork: 1 of 1