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-rw-r--r--tools/perf/Documentation/perf-diff.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index fa413ac914f..21cc2ef7756 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -83,6 +83,10 @@ OPTIONS
on the computation results.
See COMPARISON METHODS section for more info.
+-p::
+--period::
+ Show period values for both compared hist entries.
+
COMPARISON METHODS
------------------
delta