怎么看JVM中的JIT编译code？ [英] How to see JIT-compiled code in JVM?

问题描述

有一些办法看到本地code产生由在JVM中的JIT？

Is there some way to see the native code produces by the JIT in a JVM?

推荐答案

假设你正在使用Sun JVM热点。添加标记

Assuming you're using the Sun Hotspot JVM. Add the flag

-XX：+ PrintOptoAssembly

-XX:+PrintOptoAssembly

要不管你正在运行。这将只打印为已JIT'd code中的组件（即你不会看到非JIT'd东西组装），但我认为这是你想要的。如果你想看到的一切想什么，如果它被JIT'd你可以通过调整可能在JIT阈值：

To whatever you're running. This will only print the assembly for code that has been JIT'd (i.e. you don't get to see assembly for non JIT'd stuff) but I think that's what you want. If you want to see what everything would like if it were JIT'd you could probably tweak the JIT threshold via:

-XX：CompileThreshold =＃

-XX:CompileThreshold=#

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