Messages in this thread | | | Date | Fri, 2 Sep 2022 16:09:27 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCHSET 0/5] perf tools: Show per-event lost sample count (v2) |
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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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