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perf inject: Clarify build-id options a little bit

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Update the documentation of --build-id and --buildid-all options to
clarify the difference between them.  The former requires full sample
processing to find which DSOs are actually used.  While the latter simply
injects every DSO's build-id from MMAP{,2} records, skipping SAMPLEs.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220923173142.805896-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2022-09-23 10:31:40 -07:00 committed by Arnaldo Carvalho de Melo
parent d031a00a29
commit fd941521e8
1 changed files with 4 additions and 2 deletions
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6
tools/perf/Documentation/perf-inject.txt
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@ -25,10 +25,12 @@ OPTIONS
-------
-b::
--build-ids::
Inject build-ids into the output stream
Inject build-ids of DSOs hit by samples into the output stream.
This means it needs to process all SAMPLE records to find the DSOs.
--buildid-all::
Inject build-ids of all DSOs into the output stream
Inject build-ids of all DSOs into the output stream regardless of hits
and skip SAMPLE processing.
--known-build-ids=::
Override build-ids to inject using these comma-separated pairs of