[tip:perf/core] perf diff: Change default setting to "delta-abs"
From: tip-bot for Namhyung Kim
Date: Tue Feb 14 2017 - 01:40:17 EST
Commit-ID: be57b3fd218ad4a19725ac4bd53e67b2ede42a9d
Gitweb: http://git.kernel.org/tip/be57b3fd218ad4a19725ac4bd53e67b2ede42a9d
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Sat, 11 Feb 2017 01:18:56 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 13 Feb 2017 14:29:38 -0300
perf diff: Change default setting to "delta-abs"
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@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170210161856.18422-1-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/Documentation/perf-diff.txt | 4 ++--
tools/perf/builtin-diff.c | 6 +++---
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 7391299..66dbe3de 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -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.
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index e68cc76..70a2893 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -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,