如何在linux上分析我的C ++应用程序 [英] How to profile my C++ application on linux

问题描述

我想在linux上配置我的c ++应用程序。
我想知道我的应用程序花在CPU处理上的时间与IO /空闲时花费的时间的比较。

I would like to profile my c++ application on linux. I would like to find out how much time my application spent on CPU processing vs time spent on block by IO/being idle.

我知道有一个简介工具调用valgrind on linux。但它分解了花在每个方法上的时间，它不能给我一个总体的CPU处理和空闲花费的时间？

I know there is a profile tool call valgrind on linux. But it breaks down time spent on each method, and it does not give me an overall picture of how much time spent on CPU processing vs idle? Or is there a way to do that with valgrind.

推荐答案

我可以推荐 valgrind 的 callgrind 工具与 KCacheGrind 可视化。 KCacheGrind很容易看出热点在哪里。

I can recommend valgrind's callgrind tool in conjunction with KCacheGrind for visualization. KCacheGrind makes it pretty easy to see where the hotspots are.

注意：由于我使用它太长，所以我不知道你能否得到I / O等待时间。也许与 iostat 或 pidstat ，您将可以看到所有时间花在哪里。

Note: It's been too long since I used it, so I'm not sure if you'll be able to get I/O Wait time out of that. Perhaps in conjunction with iostat or pidstat you'll be able to see where all the time was spent.

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