Re: perf-stat per thread results

From: Ingo Molnar
Date: Fri May 13 2011 - 11:30:47 EST



* Wim Heirman <wim@xxxxxxxxxxx> wrote:

> Hi all,
>
> I'm using perf-stat to look at hardware performance counters for a
> parallel program. Is there a way to get counter values for each thread
> individually, rather than aggregated for the whole process? [...]

Not at the moment, but it would be a useful feature.

> [...] I know I can attach to a specific thread using --tid=, but due to the
> time required to find the tid and attach/detach this isn't accurate for
> short-running programs. Or, alternatively, can I use perf record --stat and
> get an exact count for each performance counter?

Yes perf record --stat should work. 'perf report -T --stdio' is supposed to
print this, but it has regressed i think.

Arnaldo, any ideas?

Thanks,

Ingo
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