Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 07/20] perf record: Document --group option | Date | Tue, 3 Mar 2015 00:25:56 -0300 |
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From: Namhyung Kim <namhyung@kernel.org>
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> --- tools/perf/Documentation/perf-record.txt | 9 +++++++++ 1 file changed, 9 insertions(+)
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. -- 1.9.3
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