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Date: Thu, 4 Oct 2018 14:36:57 +0200 From: Jiri Olsa <jolsa@...hat.com> To: Alexey Budankov <alexey.budankov@...ux.intel.com> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Arnaldo Carvalho de Melo <acme@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Namhyung Kim <namhyung@...nel.org>, Andi Kleen <ak@...ux.intel.com>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v3] perf record: encode -k clockid frequency into Perf trace On Wed, Oct 03, 2018 at 07:57:12PM +0300, Alexey Budankov wrote: > > Store -k clockid frequency into Perf trace to enable timestamps > derived metrics conversion into wall clock time on reporting stage. > > Below is the example of perf report output: > > tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc > ... > [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ] > > tools/perf/perf report --header > # ======== > ... > # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4 > ... > # clockid frequency: 1000 MHz > ... > # ======== > > Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com> Reviewed-by: Jiri Olsa <jolsa@...nel.org> thanks, jirka
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