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perf diff: Change default setting to "delta-abs"

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The "delta-abs" compute method will show most changed entries on top.
So users can easily see how much effect between the data.  Note that it
also changes the default of -o option to 1 in order to apply the compute
method.  To see original-style (sorted by baseline) use -o 0 option.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170210161856.18422-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2017-02-11 01:18:56 +09:00 committed by Arnaldo Carvalho de Melo
parent 4b35994abe
commit be57b3fd21
2 changed files with 5 additions and 5 deletions
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4
tools/perf/Documentation/perf-diff.txt
View file

@ -87,7 +87,7 @@ OPTIONS
-c::
--compute::
Differential computation selection - delta, ratio, wdiff, delta-abs
(default is delta). Default can be changed using diff.compute
(default is delta-abs). Default can be changed using diff.compute
config option. See COMPARISON METHODS section for more info.
-p::
@ -101,7 +101,7 @@ OPTIONS
-o::
--order::
Specify compute sorting column number. 0 means sorting by baseline
overhead (default) and 1 means sorting by computed value of column 1
overhead and 1 (default) 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.

6
tools/perf/builtin-diff.c
View file

@ -66,7 +66,7 @@ static bool force;
static bool show_period;
static bool show_formula;
static bool show_baseline_only;
static unsigned int sort_compute;
static unsigned int sort_compute = 1;
static s64 compute_wdiff_w1;
static s64 compute_wdiff_w2;
@ -86,7 +86,7 @@ const char *compute_names[COMPUTE_MAX] = {
[COMPUTE_WEIGHTED_DIFF] = "wdiff",
};
static int compute = COMPUTE_DELTA;
static int compute = COMPUTE_DELTA_ABS;
static int compute_2_hpp[COMPUTE_MAX] = {
[COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
@ -810,7 +810,7 @@ static const struct option options[] = {
OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
"Show only items with match in baseline"),
OPT_CALLBACK('c', "compute", &compute,
"delta,delta-abs,ratio,wdiff:w1,w2 (default delta)",
"delta,delta-abs,ratio,wdiff:w1,w2 (default delta-abs)",
"Entries differential computation selection",
setup_compute),
OPT_BOOLEAN('p', "period", &show_period,