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

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Date:   Fri, 19 Aug 2022 12:53:26 +0200
From:   Jiri Olsa <olsajiri@...il.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.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 (v3)

On Thu, Aug 18, 2022 at 05:36:40PM -0700, Namhyung Kim wrote:
> Hello,
> 
> The kernel v6.0 added PERF_FORMAT_LOST which can read a number of lost
> 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.
> 
> Changes in v3)
>  * add sample_read_group__for_each()  (Jiri)

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka

> 
> Changes in v2)
>  * add a comment in perf_evsel__read_group()  (Jiri)
>  * simplify perf_evsel__adjust_values()  (Jiri)
> 
> 
> You can get the code from 'perf/read-lost-v3' 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                        |  79 ++++++++-
>  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                       |  21 ++-
>  tools/perf/util/evsel.c                       |  29 ++--
>  .../scripting-engines/trace-event-python.c    |  19 ++-
>  tools/perf/util/session.c                     |  35 ++--
>  tools/perf/util/synthetic-events.c            |  32 +++-
>  11 files changed, 356 insertions(+), 46 deletions(-)
> 
> 
> base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
> -- 
> 2.37.1.595.g718a3a8f04-goog
>