可以从perf.data文件生成perf-stat结果吗? [英] Can perf-stat results be generated from a perf.data file?

问题描述

当我想从Linux工具套件中使用perf-stat和perf-report生成性能报告时， perf ，我运行:

When I want to generate performance reports using perf-stat and perf-report from the Linux tool suite perf, I run:

$ perf record -o my.perf.data myCmd
$ perf report -i my.perf.data

并且:

$ perf stat myCmd

但这意味着我第二次运行"myCmd"，这需要几分钟.相反，我希望是:

But that means I run 'myCmd' a second time, which takes several minutes. Instead, I was hoping for:

$ perf stat -i my.perf.data

但是与perf套件中的大多数工具不同，我没有看到perf-stat的-i选项.是否有另一种工具，或获取perf-report来生成与perf-stat类似的输出的方法?

But unlike most of the tools in the perf suite, I don't see a -i option for perf-stat. Is there another tool for this, or a way to get perf-report to generate similar output to perf-stat?

推荐答案

我在kernel.org上挖掘了源代码，看来没有办法获取perf stat来解析perf.data

I dug into the source on kernel.org and it looks like there's no way to get perf stat to parse perf.data

http://git.kernel.org/?p=linux/kernel/git/stable/linux-stablegit; a = blob; f = tools/perf/builtin-stat.c; h = c70d72003557f17f29345b0f219dc5ca9f572d75; hb = refs/heads/linux-2.6.33.y

如果您查看第245行，则会看到函数"run_perf_stat"，而308-320附近的行似乎实际上是在进行记录和整理.

If you look at line 245 you'll see the function "run_perf_stat" and the lines around 308-320 seem to be what actually do the recording and collating.

我没有花足够的力气来确定是否有可能启用所需的功能.

I didn't dig into this hard enough to determine if it's possible to enable the kind of functionality that you desire.

perf报表似乎不具有许多其他格式化功能.您可以在此处进一步检查:

It does not look like perf report has a lot of additional formatting capabilities to it. You can check further if you like here:

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