Messages in this thread | | | Date | Fri, 4 Mar 2022 14:56:36 +0800 | From | Huang Rui <> | Subject | Re: [PATCH V2 4/4] Documentation: amd-pstate: add tracer tool introduction |
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On Fri, Mar 04, 2022 at 02:07:24PM +0800, Su, Jinzhou (Joe) wrote: > Add amd pstate tracer tool introduction > > Signed-off-by: Jinzhou Su <Jinzhou.Su@amd.com> > --- > Documentation/admin-guide/pm/amd-pstate.rst | 26 +++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst > index 2f066df4ee9c..17dd7396e8fc 100644 > --- a/Documentation/admin-guide/pm/amd-pstate.rst > +++ b/Documentation/admin-guide/pm/amd-pstate.rst > @@ -369,6 +369,32 @@ governor (for the policies it is attached to), or by the ``CPUFreq`` core (for t > policies with other scaling governors). > > > +Tracer Tool > +------------- > + > +``amd_pstate_tracer.py`` can record and parse amd-pstate trace log, then
amd-pstate -> ``amd-pstate``
> +generate performance plots. This utility can be used to debug and tune the > +performance of the amd-pstate driver. The tracer tool needs to import intel
amd-pstate -> ``amd-pstate``
> +pstate tracer. > + > +Tracer tool located in linux/tools/power/x86/amd_pstate_tracer. It can be
linux/tools/power/x86/amd_pstate_tracer -> ``linux/tools/power/x86/amd_pstate_tracer``
> +used in two ways. If trace file is available, then directly parse the file > +with command :: > + > + ./amd_pstate_trace.py [-c cpus] -t <trace_file> -n <test_name> > + > +Or generate trace file with root privilege, then parse and plot with command :: > + > + sudo ./amd_pstate_trace.py [-c cpus] -n <test_name> -i <interval> [-m kbytes] > + > +The test result can be found in ``results/test_name``. Following is the example > +about part of the output. :: > + > + common_cpu common_secs common_usecs min_perf des_perf max_perf freq mperf apef tsc load duration_ms sample_num elapsed_time common_comm > + CPU_005 712 116384 39 49 166 0.7565 9645075 2214891 38431470 25.1 11.646 469 2.496 kworker/5:0-40 > + CPU_006 712 116408 39 49 166 0.6769 8950227 1839034 37192089 24.06 11.272 470 2.496 kworker/6:0-1264 > + > + > Reference > =========== > > -- > 2.27.0 >
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