diff options
| author | Jiri Olsa <jolsa@redhat.com> | 2012-10-05 16:44:42 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-10-05 19:08:54 +0200 |
| commit | 96c47f19846742bdfa3c153c8d26ccca5945586b (patch) | |
| tree | 209bbd497e4ddc814718fd8963abd615850e412d /tools/perf/Documentation/perf-diff.txt | |
| parent | perf diff: Add ratio computation way to compare hist entries (diff) | |
| download | linux-96c47f19846742bdfa3c153c8d26ccca5945586b.tar.xz linux-96c47f19846742bdfa3c153c8d26ccca5945586b.zip | |
perf diff: Add option to sort entries based on diff computation
Adding support to sort hist entries based on the outcome of selected
computation. It's now possible to specify '+' as a first character of
'-c' option value to make such sort.
Example:
$ perf diff -c ratio -b
# Event 'cache-misses'
#
# Baseline Ratio Shared Object Symbol
# ........ .............. ................. ................................
#
19.64% 0.69 [kernel.kallsyms] [k] clear_page
0.30% 0.17 [kernel.kallsyms] [k] mm_alloc
0.04% 0.20 [kernel.kallsyms] [k] kmem_cache_alloc
$ perf diff -c +ratio -b
# Event 'cache-misses'
#
# Baseline Ratio Shared Object Symbol
# ........ .............. ................. ................................
#
19.64% 0.69 [kernel.kallsyms] [k] clear_page
0.04% 0.20 [kernel.kallsyms] [k] kmem_cache_alloc
0.30% 0.17 [kernel.kallsyms] [k] mm_alloc
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349448287-18919-4-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-diff.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-diff.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index 8fff0618c597..cff3d9b6e4a3 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -79,6 +79,8 @@ OPTIONS -c:: --compute:: Differential computation selection - delta,ratio (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. COMPARISON METHODS |