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| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-15 11:27:24 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-15 11:27:24 -0300 |
| commit | 4a03af3ee399e87934e18ae720dda72c52f0050c (patch) | |
| tree | 4a88f022e33217ee56798a08ca96ff30b88bd1fc /tools/perf | |
| parent | perf vendor events arm64: Add Fujitsu A64FX pmu event (diff) | |
| download | linux-dev-4a03af3ee399e87934e18ae720dda72c52f0050c.tar.xz linux-dev-4a03af3ee399e87934e18ae720dda72c52f0050c.zip | |
perf stat: Elaborate use cases for the -n/--null command line option
The existing text was way too terse, pick the intended usage from the
cset that introduced this option.
Twitter: https://twitter.com/_monoid/status/1371461130175004672?s=20
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-stat.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt index 08a1714494f8..3055aad38d46 100644 --- a/tools/perf/Documentation/perf-stat.txt +++ b/tools/perf/Documentation/perf-stat.txt @@ -142,7 +142,10 @@ Do not aggregate counts across all monitored CPUs. -n:: --null:: - null run - don't start any counters +null run - Don't start any counters. + +This can be useful to measure just elapsed wall-clock time - or to assess the +raw overhead of perf stat itself, without running any counters. -v:: --verbose:: |