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From: Wim Heirman <wim@heirman.net>
Date: Sat, 14 May 2011 14:45:44 +0200
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Subject: Re: perf-stat per thread results
To: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>, David Ahern <dsahern@gmail.com>,
        linux-kernel@vger.kernel.org, Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Thomas Gleixner <tglx@linutronix.de>,
        =?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?= <fweisbec@gmail.com>,
        Brice Goglin <Brice.Goglin@inria.fr>
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On 13 May 2011 22:45, Arnaldo Carvalho de Melo <acme@redhat.com> wrote:
> Em Fri, May 13, 2011 at 10:32:58PM +0200, Wim Heirman escreveu:
>> > It's supposed to do that if --stat is specified, and it used to work - see this
>> > commit:
>
>> > ?8d51327090ac: perf report: Fix and improve the displaying of per-thread event counters
>
>> > and the output there:
>> >
>> > ? ? # ?PID ? TID ?cache-misses ?cache-references
>> > ? ? ? 4658 ?4659 ? ? ? ?495581 ? ? ? ? ? 3238779
>> > ? ? ? 4658 ?4662 ? ? ? ?498246 ? ? ? ? ? 3236823
>> > ? ? ? 4658 ?4663 ? ? ? ?499531 ? ? ? ? ? 3243162
>
>> > which appears to be roughly what Wim is asking for, AFAICT.
>
>> Thanks, this is exactly what I'm looking for. In 2.6.32 (Ubuntu 10.04)
>> it works, although if I use --pid rather than the -- <command> variant
>> the first thread seams to be missing. In 2.6.38 (Ubuntu 11.04) the
>> first thread is missing in both use cases, and I get one column per
>> processor (which in itself is fine).
>
> Can you try after applying the patches in this message:
>
> http://marc.info/?l=linux-kernel&m=130385067430510&w=2
>
> and report your results?

Sorry, no improvement.

$ ./perf record -e cycles --stat -- ./fft -p4 -m24 && ./perf report
--thread | tail
[ perf record: Woken up 5 times to write data ]
[ perf record: Captured and wrote 1.198 MB perf.data (~52331 samples) ]
# PID  TID   cpu-clock
  954  958  8067423322
  954  957  6761317556
  954  956  6006327147

$ ls /proc/$(pidof fft)/task
954  956  957  958
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