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| author |   Jin Yao <yao.jin@linux.intel.com> | 2019-06-28 17:23:04 +0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-07-02 13:20:51 -0300 |
| commit | c8f7bc1a080b081a178bff20356cb7575d385f84 (patch) | |
| tree | 5f87442bb1ecc71c4ac47b811ae9e3e72042c93a /tools | |
| parent | perf diff: Print the basic block cycles diff (diff) | |
| download | linux-dev-c8f7bc1a080b081a178bff20356cb7575d385f84.tar.xz linux-dev-c8f7bc1a080b081a178bff20356cb7575d385f84.zip | |
perf diff: Documentation -c cycles option
Documentation the new computation selection 'cycles'.
v4:
---
Change the column 'Block cycles diff [start:end]' to
'[Program Block Range] Cycles Diff'
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1561713784-30533-8-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-diff.txt | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt index facd91e4e945..d5cc15e651cf 100644 --- a/tools/perf/Documentation/perf-diff.txt +++ b/tools/perf/Documentation/perf-diff.txt @@ -90,9 +90,10 @@ OPTIONS -c:: --compute:: - Differential computation selection - delta, ratio, wdiff, delta-abs - (default is delta-abs). Default can be changed using diff.compute - config option. See COMPARISON METHODS section for more info. + Differential computation selection - delta, ratio, wdiff, cycles, + delta-abs (default is delta-abs). Default can be changed using + diff.compute config option. See COMPARISON METHODS section for + more info. -p:: --period:: @@ -280,6 +281,16 @@ If specified the 'Weighted diff' column is displayed with value 'd' computed as: - WEIGHT-A being the weight of the data file - WEIGHT-B being the weight of the baseline data file +cycles +~~~~~~ +If specified the '[Program Block Range] Cycles Diff' column is displayed. +It displays the cycles difference of same program basic block amongst +two perf.data. The program basic block is the code between two branches. + +'[Program Block Range]' indicates the range of a program basic block. +Source line is reported if it can be found otherwise uses symbol+offset +instead. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-report[1] |