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authorJiri Olsa <jolsa@kernel.org>2018-01-07 17:03:56 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-01-10 12:00:56 -0300
commit930f8b3479444d264aa33e008c4b00b86e8c62cc (patch)
tree5f3e29f022dbd04d636c619f642cdd3e41ae962f /tools/perf/Documentation
parent2d1073def3cb69aa44f99be7ef42da7cc561be1f (diff)
downloadlinux-930f8b3479444d264aa33e008c4b00b86e8c62cc.tar.bz2
perf report: Add --tasks option to display monitored tasks
Add --tasks option to display monitored tasks stored in perf.data. Displaying pid/tid/ppid plus the command string aligned to distinguish parent and child tasks. $ perf record -a ... $ perf report --tasks # pid tid ppid comm 0 0 -1 |swapper 2 2 0 | kthreadd 14080 14080 2 | kworker/u17:1 4 4 2 | kworker/0:0H 6 6 2 | mm_percpu_wq ... 1 1 0 | systemd 23242 23242 1 | firefox 23242 23298 23242 | Cache2 I/O 23242 23304 23242 | GMPThread ... 1195 1195 1 | login 1611 1611 1195 | bash 1639 1639 1611 | startx 1663 1663 1639 | xinit 1673 1673 1663 | xmonad-x86_64-l 23939 23939 1673 | xterm 23941 23941 23939 | bash 23963 23963 23941 | mutt 24954 24954 23963 | offlineimap Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.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/20180107160356.28203-13-jolsa@kernel.org [ Make it --tasks, plural, --task works as well, as its unambiguous ] [ Use machine__find_thread(), not findnew(), as pointed out by Namhyung ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-report.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index a7d11ef2fe25..856c3c7e94fa 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -461,6 +461,10 @@ include::itrace.txt[]
Display overall events statistics without any further processing.
(like the one at the end of the perf report -D command)
+--tasks::
+ Display monitored tasks stored in perf data. Displaying pid/tid/ppid
+ plus the command string aligned to distinguish parent and child tasks.
+
include::callchain-overhead-calculation.txt[]
SEE ALSO