Messages in this thread | | | Date | Wed, 2 Mar 2016 12:23:46 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH 4/7] perf, tools, stat: Document CSV format in manpage |
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On Tue, Mar 01, 2016 at 10:57:49AM -0800, Andi Kleen wrote: > From: Andi Kleen <ak@linux.intel.com> > > With all the recently added fields in the perf stat CSV output > we should finally document them in the man page. Do this here. > > v2: Fix fields in documentation (Jiri) > v3: fix order of fields again (Jiri) > v4: Change order again. > v5: Document more fields (Jiri) > Signed-off-by: Andi Kleen <ak@linux.intel.com> > --- > tools/perf/Documentation/perf-stat.txt | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt > index 52ef7a9..de1586b 100644 > --- a/tools/perf/Documentation/perf-stat.txt > +++ b/tools/perf/Documentation/perf-stat.txt > @@ -211,6 +211,29 @@ $ perf stat -- make -j > > Wall-clock time elapsed: 719.554352 msecs > > +CSV FORMAT > +---------- > + > +With -x, perf stat is able to output a not-quite-CSV format output > +Commas in the output are not put into "". To make it easy to parse > +it is recommended to use a different character like -x \; > + > +The fields are in this order: > + > + - optional CPU, core, or socket identifier ^ trailing whitespace
> + - optional number of cores aggregated > + - optional usec time stamp in fractions of second (with -I xxx)
the interval time should be the first item
[jolsa@krava perf]$ sudo ./perf stat --per-socket -a -I 1000 -x, -e cycles 1.000159610,S0,4,298027426,,cycles,4002819542,100.00 1.409246878,S0,4,110643936,,cycles,1637336562,100.00
[jolsa@krava perf]$ sudo ./perf stat --per-core -a -I 1000 -x, -e cycles 1.000145489,S0-C0,2,130631326,,cycles,2001381034,100.00 1.000145489,S0-C1,2,161500168,,cycles,2001374772,100.00 1.448799712,S0-C0,2,102189718,,cycles,897831386,100.00 1.448799712,S0-C1,2,112392552,,cycles,897832554,100.00
[jolsa@krava perf]$ sudo ./perf stat -A -a -I 1000 -x, -e cycles 1.000127414,CPU0,88288182,,cycles,1000705402,100.00 1.000127414,CPU1,63578396,,cycles,1000704841,100.00
jirka
> + - counter value > + - unit of the counter value or empty > + - event name > + - run time of counter > + - percentage of measurement time the counter was running > + - optional variance if multiple values are collected with -r > + - optional metric value > + - optional unit of metric > + > +Additional metrics may be printed with all earlier fields being empty. > + > SEE ALSO > -------- > linkperf:perf-top[1], linkperf:perf-list[1] > -- > 2.5.0 >
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