perf script: Improve man page description of metrics
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>
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@ -228,11 +228,11 @@ OPTIONS
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With the metric option perf script can compute metrics for
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With the metric option perf script can compute metrics for
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sampling periods, similar to perf stat. This requires
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sampling periods, similar to perf stat. This requires
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specifying a group with multiple metrics with the :S option
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specifying a group with multiple events defining metrics with the :S option
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for perf record. perf will sample on the first event, and
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for perf record. perf will sample on the first event, and
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compute metrics for all the events in the group. Please note
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print computed metrics for all the events in the group. Please note
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that the metric computed is averaged over the whole sampling
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that the metric computed is averaged over the whole sampling
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period, not just for the sample point.
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period (since the last sample), not just for the sample point.
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For sample events it's possible to display misc field with -F +misc option,
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For sample events it's possible to display misc field with -F +misc option,
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following letters are displayed for each bit:
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following letters are displayed for each bit:
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