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authorJiri Olsa <jolsa@redhat.com>2018-02-09 10:27:34 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-02-16 10:09:24 -0300
commitad52b8cb4886f572b147b02f4c59a648bbf05f9c (patch)
tree5c209122c2d84b6c21a62c31e537ba63d349c0a6 /tools/perf/Documentation
parent8614ada0be7d7be84b85c006d526a9c8f76484fa (diff)
downloadlinux-ad52b8cb4886f572b147b02f4c59a648bbf05f9c.tar.bz2
perf report: Add support to display group output for non group events
Add support to display group output for if non grouped events are detected and user forces --group option. Now for non-group events recorded like: $ perf record -e 'cycles,instructions' ls you can still get group output by using --group option in report: $ perf report --group --stdio ... # Overhead Command Shared Object Symbol # ................ ....... ................ ...................... # 17.67% 0.00% ls libc-2.25.so [.] _IO_do_write@@GLIB 15.59% 25.94% ls ls [.] calculate_columns 15.41% 31.35% ls libc-2.25.so [.] __strcoll_l ... Committer note: We should improve on this by making sure that the first line states that this is not a group, but since the user doesn't have to force group view when really using grouped events (e.g. '{cycles,instructions}'), the user better know what is being done... Requested-by: Stephane Eranian <eranian@google.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Stephane Eranian <eranian@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180209092734.GB20449@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-report.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 907e505b6309..a76b871f78a6 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -354,7 +354,8 @@ OPTIONS
Path to objdump binary.
--group::
- Show event group information together.
+ Show event group information together. It forces group output also
+ if there are no groups defined in data file.
--demangle::
Demangle symbol names to human readable form. It's enabled by default,