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