Em Tue, Dec 03, 2013 at 12:05:49AM +0900, Namhyung Kim escreveu: > Hi Ingo, > > 2013-12-02 (월), 13:45 +0100, Ingo Molnar: > > * Namhyung Kim <[email protected]> wrote: > > > > > From: Namhyung Kim <[email protected]> > > > > > > It's sometimes useful to see total sampling or elapsed time with > > > normal performance result. To do that, record first and last sample > > > time for each evsel and to display it in the header (--stdio only for > > > now). > > > > > > $ perf record -a sleep 1 > > > $ perf report --stdio > > > ... > > > # Samples: 4K of event 'cycles' > > > # Event count (approx.): 4087481688 > > > # Total sampling time : 1.001260 (sec) > > > > Btw., would it make sense to output it using the 'perf stat' print-out > > machinery? > > > > If the 'count' of every event sampled is saved in the perf.data, > > including elapsed time, at the beginning and at the end, then all > > information is there to output things in perf stat style. > > Yeah, it'd be great if we can share same code in the end.
I guess we'll basically just process all samples, accumulating stuff where the builtin-stat code finds them, in struct perf_evsel, then just hand it to that code. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
