Messages in this thread | | | Date | Fri, 2 Sep 2022 20:44:25 +0300 | Subject | Re: [PATCHSET 0/5] perf tools: Show per-event lost sample count (v2) | From | Adrian Hunter <> |
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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>
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