如何禁用JIT编译器的内在函数用法？ [英] How to disable intrinsics usage for the JIT compiler?

问题描述

我正在对 JVM 进行一些性能测试，我想测量内在函数使用的影响。

I am doing some performance tests on the JVM, and I would like to measure the impact of intrinsics usage.

我想禁用 JIT 对某些方法使用内在函数而不进入解释模式。有没有办法做到这一点 ？谢谢

I would like to disable the JIT use of intrinsics for some methods without going into the interpreted mode. Is there a way to do that ? Thank you

推荐答案

使用

java -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_<method_name>[,...]

例如

java -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_equals,_hashCode

正如@apangin注意到的，你可以先用 -XX：+ PrintIntrinsics 来看看哪些方法实际上在测试中是固有的并且禁用它们。

As @apangin noticed, you may use -XX:+PrintIntrinsics first to see which methods are actually intrinsified in your test and disable them.

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