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| author |   Namhyung Kim <namhyung@kernel.org> | 2014-02-07 12:06:07 +0900 |
|---|---|---|
| committer |   Jiri Olsa <jolsa@redhat.com> | 2014-04-16 17:16:03 +0200 |
| commit | 8810f6ced73556c1a63b6269a6cdad8d630aaaf0 (patch) | |
| tree | 44357b32b7388716d983f037223cc38a27feb905 /tools/perf/Documentation/perf-diff.txt | |
| parent | perf top: Add --percentage option (diff) | |
| download | wireguard-linux-8810f6ced73556c1a63b6269a6cdad8d630aaaf0.tar.xz wireguard-linux-8810f6ced73556c1a63b6269a6cdad8d630aaaf0.zip | |
perf diff: Add --percentage option
The --percentage option is for controlling overhead percentage
displayed. It can only receive either of "relative" or "absolute" and
affects -c delta output only.
For more information, please see previous commit same thing done to
"perf report".
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1397145720-8063-5-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-diff.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-diff.txt | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index fdfceee0ffd0..fbfa1192923c 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -33,17 +33,20 @@ OPTIONS -d:: --dsos=:: Only consider symbols in these dsos. CSV that understands - file://filename entries. + file://filename entries. This option will affect the percentage + of the Baseline/Delta column. See --percentage for more info. -C:: --comms=:: Only consider symbols in these comms. CSV that understands - file://filename entries. + file://filename entries. This option will affect the percentage + of the Baseline/Delta column. See --percentage for more info. -S:: --symbols=:: Only consider these symbols. CSV that understands - file://filename entries. + file://filename entries. This option will affect the percentage + of the Baseline/Delta column. See --percentage for more info. -s:: --sort=:: @@ -89,6 +92,14 @@ OPTIONS --order:: Specify compute sorting column number. +--percentage:: + Determine how to display the overhead percentage of filtered entries. + Filters can be applied by --comms, --dsos and/or --symbols options. + + "relative" means it's relative to filtered entries only so that the + sum of shown entries will be always 100%. "absolute" means it retains + the original value before and after the filter is applied. + COMPARISON ---------- The comparison is governed by the baseline file. The baseline perf.data @@ -157,6 +168,10 @@ with: - period_percent being the % of the hist entry period value within single data file + - with filtering by -C, -d and/or -S, period_percent might be changed + relative to how entries are filtered. Use --percentage=absolute to + prevent such fluctuation. + ratio ~~~~~ If specified the 'Ratio' column is displayed with value 'r' computed as: |