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-rw-r--r--tools/perf/Documentation/perf-diff.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index af80284cd2f6..7c014c9934bb 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -99,7 +99,11 @@ OPTIONS
-o::
--order::
- Specify compute sorting column number.
+ Specify compute sorting column number. 0 means sorting by baseline
+ overhead (default) and 1 means sorting by computed value of column 1
+ (data from the first file other base baseline). Values more than 1
+ can be used only if enough data files are provided.
+ The default value can be set using the diff.order config option.
--percentage::
Determine how to display the overhead percentage of filtered entries.