Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9a75606c authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarNamhyung 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 08b23f4e

tools/perf/Documentation/perf-record.txt

+9 −0
Original line number Diff line number Diff line
@@ -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.