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-rw-r--r--tools/perf/Documentation/perf-lock.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt
index 30eea576721f..4b5cdf4b33c6 100644
--- a/tools/perf/Documentation/perf-lock.txt
+++ b/tools/perf/Documentation/perf-lock.txt
@@ -208,6 +208,9 @@ CONTENTION OPTIONS
Show results using a CSV-style output to make it easy to import directly
into spreadsheets. Columns are separated by the string specified in SEP.
+--lock-cgroup::
+ Show lock contention stat by cgroup. Requires --use-bpf.
+
SEE ALSO
--------