linux-kernel - Re: [PATCH 0/4] perf stat: Enable group read of counters

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Date:   Fri, 21 Jul 2017 14:07:38 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 0/4] perf stat: Enable group read of counters

Em Fri, Jul 21, 2017 at 02:12:08PM +0200, Jiri Olsa escreveu:
> hi,
> sending changes to enable group read of perf counters
> for perf stat command. It allows us to read whole group
> of counters within single read syscall.
> 
> Also available in here:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
>   perf/stat_group
> 
> Not sure why we haven't supported yet, but anyway it was
> unavailable for some time due to a bug which was fixed
> just recently via:
>   ba5213ae6b88 ("perf/core: Correct event creation with PERF_FORMAT_GROUP")

Thanks, applied.

- Arnaldo