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perf script: Improve man page description of metrics

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Clarify that a metric is based on events, not referring to itself. Also
some improvements with the sentences.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20190711181922.18765-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2019-07-11 11:19:22 -07:00 committed by Arnaldo Carvalho de Melo
parent 5f8eec3225
commit 7db7218a7e
1 changed files with 3 additions and 3 deletions
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6
tools/perf/Documentation/perf-script.txt
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@ -228,11 +228,11 @@ OPTIONS
With the metric option perf script can compute metrics for
sampling periods, similar to perf stat. This requires
specifying a group with multiple metrics with the :S option
specifying a group with multiple events defining metrics with the :S option
for perf record. perf will sample on the first event, and
compute metrics for all the events in the group. Please note
print computed metrics for all the events in the group. Please note
that the metric computed is averaged over the whole sampling
period, not just for the sample point.
period (since the last sample), not just for the sample point.
For sample events it's possible to display misc field with -F +misc option,
following letters are displayed for each bit: