linux-kernel - Re: [PATCH V2 07/13] perf tools: handle PERF_RECORD

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Date:   Tue, 6 Dec 2016 12:16:08 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     kan.liang@...el.com
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        linux-kernel@...r.kernel.org, alexander.shishkin@...ux.intel.com,
        tglx@...utronix.de, namhyung@...nel.org, jolsa@...nel.org,
        adrian.hunter@...el.com, wangnan0@...wei.com, mark.rutland@....com,
        andi@...stfloor.org
Subject: Re: [PATCH V2 07/13] perf tools: handle PERF_RECORD_OVERHEAD record
 type

On Fri, Dec 02, 2016 at 04:19:15PM -0500, kan.liang@...el.com wrote:
> From: Kan Liang <kan.liang@...el.com>
> 
> The infrastructure to handle PERF_RECORD_OVERHEAD record type.
> A new perf report option is introduced as a knob to show the profiling
> overhead information. The option also forces tty output.
> 
> The overhead information is auxillary information, so it should be
> possible to access it together with normal sampling information in a
> single output file. But the overhead is overall profiling time cost, not
> per-sample/event profiling time cost. Making overhead a standard sort
> key could confuse the normal samples.
> So the information is printed separately in the head of the output.
> 
> Signed-off-by: Kan Liang <kan.liang@...el.com>
> ---
>  tools/perf/Documentation/perf-report.txt |  3 +++
>  tools/perf/builtin-report.c              | 16 +++++++++++++++-
>  tools/perf/util/event.c                  |  9 +++++++++
>  tools/perf/util/event.h                  | 11 +++++++++++
>  tools/perf/util/evlist.c                 |  6 ++++++
>  tools/perf/util/evlist.h                 |  1 +
>  tools/perf/util/machine.c                | 10 ++++++++++
>  tools/perf/util/machine.h                |  3 +++
>  tools/perf/util/session.c                | 21 +++++++++++++++++++++
>  tools/perf/util/session.h                |  3 +++
>  tools/perf/util/symbol.h                 |  3 ++-
>  tools/perf/util/tool.h                   |  1 +
>  12 files changed, 85 insertions(+), 2 deletions(-)

I think also perf inject needs repipe this overhead handler

jirka