diff options
Diffstat (limited to 'tools/perf/Documentation/perf-diff.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-diff.txt | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index cff3d9b6e4a3..fa413ac914f5 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -78,7 +78,7 @@ OPTIONS -c:: --compute:: - Differential computation selection - delta,ratio (default is delta). + Differential computation selection - delta,ratio,wdiff (default is delta). If '+' is specified as a first character, the output is sorted based on the computation results. See COMPARISON METHODS section for more info. @@ -110,6 +110,19 @@ with: - period being the hist entry period value +wdiff +~~~~~ +If specified the 'Weighted diff' column is displayed with value 'd' computed as: + + d = B->period * WEIGHT-A - A->period * WEIGHT-B + + - A/B being matching hist entry from first/second file specified + (or perf.data/perf.data.old) respectively. + + - period being the hist entry period value + + - WEIGHT-A/WEIGHT-B being user suplied weights in the the '-c' option + behind ':' separator like '-c wdiff:1,2'. SEE ALSO -------- |