diff options
| author |   Changbin Du <changbin.du@gmail.com> | 2020-08-08 10:31:36 +0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-08-14 09:29:35 -0300 |
| commit | 00c85d5f45b6b366f68c876cd89b8b790f50ea0f (patch) | |
| tree | 3a897f8c0a95bec9d7c8c0a46af68641c625949f /tools/perf/Documentation/perf-ftrace.txt | |
| parent | perf ftrace: Add option 'verbose' to show more info for graph tracer (diff) | |
| download | wireguard-linux-00c85d5f45b6b366f68c876cd89b8b790f50ea0f.tar.xz wireguard-linux-00c85d5f45b6b366f68c876cd89b8b790f50ea0f.zip | |
perf ftrace: Add support for trace option tracing_thresh
This adds an option '--graph-opts thresh' to setup trace duration
threshold for funcgraph tracer.
$ sudo ./perf ftrace -G '*' --graph-opts thresh=100
3) ! 184.060 us | } /* schedule */
3) ! 185.600 us | } /* exit_to_usermode_loop */
2) ! 225.989 us | } /* schedule_idle */
2) # 4140.051 us | } /* do_idle */
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: http://lore.kernel.org/lkml/20200808023141.14227-14-changbin.du@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-ftrace.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-ftrace.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index a2056aaf2ece..6fa927e5971b 100644 --- a/tools/perf/Documentation/perf-ftrace.txt +++ b/tools/perf/Documentation/perf-ftrace.txt @@ -107,6 +107,7 @@ OPTIONS nosleep-time - Measure on-CPU time only for function_graph tracer. noirqs - Ignore functions that happen inside interrupt. verbose - Show process names, PIDs, timestamps, etc. + thresh=<n> - Setup trace duration threshold in microseconds. SEE ALSO -------- |