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authorNamhyung Kim <namhyung@kernel.org>2022-09-23 10:31:40 -0700
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-10-04 08:55:22 -0300
commitfd941521e81fd24e4ab164f88513612fb5f3af85 (patch)
treea8be559d3b025265b2b3938c2f97fcb00ccb4711
parentd031a00a29b2b2a6ad99c41fadb1ea3c0dc5046c (diff)
perf inject: Clarify build-id options a little bit
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>
-rw-r--r--tools/perf/Documentation/perf-inject.txt6
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt
index 70e2ac3cc91a..c972032f4ca0 100644
--- a/tools/perf/Documentation/perf-inject.txt
+++ b/tools/perf/Documentation/perf-inject.txt
@@ -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