卡尺错误: CICompilerCount of 1 无效;必须至少为 2

2022-09-04 02:11:19

我有一个卡尺基准(1.0-beta-2):

import com.google.caliper.Benchmark;
import com.google.caliper.runner.CaliperMain;

public class MyBenchmark {

    @Benchmark public int a(int rep) {
        return 0;
    }

    public static void main(String[] args) {
        CaliperMain.main(MyBenchmark.class, args);
    }   
}

我从 eclipse 或命令行运行它:

mvn exec:java -Dexec.mainClass="com.google.caliper.runner.CaliperMain" -Dexec.args="MyBenchmark" 

在这两种情况下,我都得到了一个错误:

ERROR: Trial failed to complete (its results will not be included in the run):
  The worker exited without producing data. It has likely crashed. Inspect /tmp/1427055470061-0/trial-1.log to see any worker output.

在这个文件我看到:

Trial Number: 1
Trial Id: d663a0b5-55b4-43c3-97d8-93f14f436342
Experiment: {instrument=allocation, benchmarkMethod=a, vm=default, parameters={}}

[stderr] CICompilerCount of 1 is invalid; must be at least 2
[stderr] Error: Could not create the Java Virtual Machine.
[stderr] Error: A fatal exception has occurred. Program will exit.

ubuntu 14.04, java:

java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

任何想法如何解决它?


答案 1

我找到了一个解决方案。标志有帮助。它可以直接在微模板java类中用作:-XX:-TieredCompilation

import com.google.caliper.api.VmOptions;

@VmOptions("-XX:-TieredCompilation")
public class MyMicrobenchmark {
...

答案 2

这是卡尺中的一个错误。它用作缺省 JVM 参数。但是,当分层编译处于打开状态时,必须至少有 2 个编译器线程(一个用于 C1,一个用于 C2)。-XX:CICompilerCount=1

尝试使用较大的值手动覆盖。-XX:CICompilerCount


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