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perf stat: extend -D,--delay option with -1 value

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Extend -D,--delay option with -1 value to start monitoring with
events disabled to be enabled later by enable command provided
via control file descriptor.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/81ac633c-a844-5cfb-931c-820f6e6cbd12@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov
2020-07-17 10:04:33 +03:00
committed by Arnaldo Carvalho de Melo
parent 987b823813
commit 2162b9c6bd
4 changed files with 21 additions and 7 deletions
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5
tools/perf/Documentation/perf-stat.txt
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@@ -238,8 +238,9 @@ mode, use --per-node in addition to -a. (system-wide).
-D msecs::
--delay msecs::
After starting the program, wait msecs before measuring. This is useful to
filter out the startup phase of the program, which is often very different.
After starting the program, wait msecs before measuring (-1: start with events
disabled). This is useful to filter out the startup phase of the program,
which is often very different.
-T::
--transaction::