linux-kernel - Re: [PATCH 0/4] perf tools: Support reading PERF_FORMAT

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Date:   Tue, 16 Aug 2022 17:01:21 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 0/4] perf tools: Support reading PERF_FORMAT_LOST

Em Mon, Aug 15, 2022 at 12:01:02PM -0700, Namhyung Kim escreveu:
> Hello,
> 
> The kernel v6.0 added PERF_FORMAT_LOST which can read a number of lost

I've tentantively added this to perf/urgent, as this matches a feature
introduced in this merge window, we'll see how it goes, hopefully Linus
accepts this at this point.

- Arnaldo

> samples for the given event.  As it can change the output format of
> read(2) and perf sample data, it needs to access them carefully.
> 
> You can get the code from 'perf/read-lost-v1' brach on
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
> 
> Thanks,
> Namhyung
> 
> 
> Namhyung Kim (4):
>   tools headers UAPI: Sync linux/perf_event.h with the kernel sources
>   tools lib perf: Handle read format in perf_evsel__read()
>   tools lib perf: Add a test case for read formats
>   perf tools: Support reading PERF_FORMAT_LOST
> 
>  tools/include/uapi/linux/perf_event.h         |   5 +-
>  tools/lib/perf/evsel.c                        |  72 ++++++++
>  tools/lib/perf/include/perf/event.h           |   3 +-
>  tools/lib/perf/include/perf/evsel.h           |   4 +-
>  tools/lib/perf/tests/test-evsel.c             | 161 ++++++++++++++++++
>  tools/perf/tests/sample-parsing.c             |  14 +-
>  tools/perf/util/event.h                       |  18 +-
>  tools/perf/util/evsel.c                       |  33 +++-
>  .../scripting-engines/trace-event-python.c    |  16 +-
>  tools/perf/util/session.c                     |  32 ++--
>  tools/perf/util/synthetic-events.c            |  34 +++-
>  11 files changed, 354 insertions(+), 38 deletions(-)
> 
> 
> base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
> -- 
> 2.37.1.595.g718a3a8f04-goog

-- 

- Arnaldo