Re: [PATCH v3] perf record: encode -k clockid frequency into Perf trace

[Jiri Olsa]

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@xxxxxxxxxxxxxxx>

Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx>

thanks,
jirka