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| author | Davidlohr Bueso | 2013-09-09 04:19:19 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2013-10-09 16:24:01 +0200 |
| commit | f37376cd721a539ac398cbb7718b72fce83cd49b (patch) | |
| tree | 2af484293bd583c2af6ed313011fa2592259b89e /tools/perf/Documentation | |
| parent | perf lock: Limit bad rate precision (diff) | |
| download | kernel-qcow2-linux-f37376cd721a539ac398cbb7718b72fce83cd49b.tar.gz kernel-qcow2-linux-f37376cd721a539ac398cbb7718b72fce83cd49b.tar.xz kernel-qcow2-linux-f37376cd721a539ac398cbb7718b72fce83cd49b.zip | |
perf lock: Account for lock average wait time
While perf-lock currently reports both the total wait time and the
number of contentions, it doesn't explicitly show the average wait time.
Having this value immediately in the report can be quite useful when
looking into performance issues.
Furthermore, allowing report to sort by averages is another handy
feature to have - and thus do not only print the value, but add it to
the lock_stat structure.
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1378693159-8747-8-git-send-email-davidlohr@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-lock.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt index c7f5f55634ac..ab25be28c9dc 100644 --- a/tools/perf/Documentation/perf-lock.txt +++ b/tools/perf/Documentation/perf-lock.txt @@ -48,7 +48,7 @@ REPORT OPTIONS -k:: --key=<value>:: Sorting key. Possible values: acquired (default), contended, - wait_total, wait_max, wait_min. + avg_wait, wait_total, wait_max, wait_min. INFO OPTIONS ------------ |