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| author | Andi Kleen <ak@linux.intel.com> | 2019-03-05 15:47:48 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-11 15:56:03 +0100 |
| commit | 2a1292cbd4e5c81edbf815a410fa2072c341db1e (patch) | |
| tree | a585e8e994e6003414734f49b2eccf838f402266 /tools/perf/Documentation/perf-report.txt | |
| parent | perf time-utils: Add utility function to print time stamps in nanoseconds (diff) | |
| download | linux-2a1292cbd4e5c81edbf815a410fa2072c341db1e.tar.xz linux-2a1292cbd4e5c81edbf815a410fa2072c341db1e.zip | |
perf report: Parse time quantum
Many workloads change over time. 'perf report' currently aggregates the
whole time range reported in perf.data.
This patch adds an option for a time quantum to quantisize the perf.data
over time.
This just adds the option, will be used in follow on patches for a time
sort key.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20190305144758.12397-6-andi@firstfloor.org
[ Use NSEC_PER_[MU]SEC ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-report.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 51dbc519dbce..9ec1702bccdd 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -497,6 +497,10 @@ include::itrace.txt[] The period/hits keywords set the base the percentage is computed on - the samples period or the number of samples (hits). +--time-quantum:: + Configure time quantum for time sort key. Default 100ms. + Accepts s, us, ms, ns units. + include::callchain-overhead-calculation.txt[] SEE ALSO |