diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2015-03-02 12:13:33 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-03-02 12:04:45 -0300 |
| commit | 9a75606ca06d94aab1ed0dbe96935e3f89dfb81c (patch) | |
| tree | abc35265d3539b1e1bfe60c2f9b6d4fef42b8b98 /tools/perf/Documentation | |
| parent | 08b23f4e635fa42a1d3ebdf31b8bb720f17d6c14 (diff) | |
perf record: Document --group option
The 'perf record --group' option lacks documentation and confuses users.
As -e/--event option already supports group spec, it should not be used
anymore.
Also add a short description of event group itself.
Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1425266013-5034-1-git-send-email-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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 4d668945dfe6..355c4f5569b5 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -55,6 +55,11 @@ OPTIONS If you want to profile write accesses in [0x1000~1008), just set 'mem:0x1000/8:w'. + - a group of events surrounded by a pair of brace ("{event1,event2,...}"). + Each event is separated by commas and the group should be quoted to + prevent the shell interpretation. You also need to use --group on + "perf report" to view group events together. + --filter=<filter>:: Event filter. @@ -104,6 +109,10 @@ OPTIONS specification with appended unit character - B/K/M/G. The size is rounded up to have nearest pages power of two value. +--group:: + Put all events in a single event group. This precedes the --event + option and remains only for backward compatibility. See --event. + -g:: Enables call-graph (stack chain/backtrace) recording. |