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SubjectRe: [PATCHSET 0/5] perf tools: Show per-event lost sample count (v2)
Em Fri, Sep 02, 2022 at 08:44:25PM +0300, Adrian Hunter escreveu:
> On 1/09/22 22:57, Namhyung Kim wrote:
> > Hello,
> >
> > Now we have PERF_FORMAT_LOST support, add it to perf record and report so that
> > it can show number of lost samples per event. This can be useful if you want
> > to reconstruct number of events from the samples like when using -c option.
> >
> > Changes in v2)
> > * fix id_hdr_size calculation (Adrian)
> > * fix a memory leak
> > * display lost samples even if no samples
> >
> >
> > Currently it adds PERF_RECORD_LOST_SAMPLES at the end of perf data after reading
> > event values by read(2). The perf record unconditionally sets the lost bit if
> > the kernel supports it. Users can see the number with `perf report --stat`.
> >
> > You can get the code from 'perf/report-lost-v2' brach on
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
> >
> > Thanks,
> > Namhyung
> >
> > Namhyung Kim (5):
> > perf tools: Print LOST read format in the verbose mode
> > perf record: Set PERF_FORMAT_LOST by default
> > perf record: Read and inject LOST_SAMPLES events
> > perf hist: Add nr_lost_samples to hist_stats
> > perf report: Show per-event LOST SAMPLES stat
>
> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>

Thanks, applied.

- Arnaldo

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