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| author | Namhyung Kim <namhyung@kernel.org> | 2022-06-15 19:32:21 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-12 15:56:05 +0300 |
| commit | 7cb2a53f7f413734734bac214c4855e9863b9853 (patch) | |
| tree | b7ed211604d0a98cfcfb3c24089e205024cb5694 /tools/perf/Documentation | |
| parent | 3ae03f2650b8d87242906f6c160732bc9d991ca1 (diff) | |
| download | linux-7cb2a53f7f413734734bac214c4855e9863b9853.tar.xz | |
perf record: Allow to specify max stack depth of fp callchain
Currently it has no interface to specify the max stack depth for perf
record. Extend the command line parameter to accept a number after
'fp' to specify the depth like '--call-graph fp,32'.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
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: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220615163222.1275500-7-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 6bd6d07021ba..099817ef5150 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -275,6 +275,11 @@ OPTIONS User can change the size by passing the size after comma like "--call-graph dwarf,4096". + When "fp" recording is used, perf tries to save stack enties + up to the number specified in sysctl.kernel.perf_event_max_stack + by default. User can change the number by passing it after comma + like "--call-graph fp,32". + -q:: --quiet:: Don't print any message, useful for scripting. |