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From: Namhyung Kim <namhyung@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Jiri Olsa <jolsa@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	Minchan Kim <minchan@kernel.org>,
	Taeung Song <treeze.taeung@gmail.com>
Subject: [PATCH 3/3] perf diff: Add diff.compute config option
Date: Mon,  6 Feb 2017 16:20:37 +0900	[thread overview]
Message-ID: <20170206072037.8189-4-namhyung@kernel.org> (raw)
In-Reply-To: <20170206072037.8189-1-namhyung@kernel.org>

The diff.compute config variable is to set the default compute method of
perf diff command (-c option).  Possible values 'delta' (default),
'delta-abs', 'ratio' and 'wdiff'.

Cc: Taeung Song <treeze.taeung@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/Documentation/perf-config.txt |  5 +++++
 tools/perf/Documentation/perf-diff.txt   |  5 +++--
 tools/perf/builtin-diff.c                | 16 +++++++++++++++-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
index 5b54d47ef713..f2d758dc1edc 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -505,6 +505,11 @@ Variables
 		Setting it to 1 will sort the result by delta (or other
 		compute method selected).
 
+	diff.compute::
+		This options sets the method of computing diff result.
+		Possible values are 'delta', 'delta-abs', 'ratio' and
+		'wdiff'.  Default is 'delta'.
+
 SEE ALSO
 --------
 linkperf:perf[1]
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 6ba3bf582d79..70f490408262 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -86,8 +86,9 @@ OPTIONS
 
 -c::
 --compute::
-        Differential computation selection - delta,ratio,wdiff,delta-abs (default is delta).
-        See COMPARISON METHODS section for more info.
+        Differential computation selection - delta,ratio,wdiff,delta-abs
+	(default is delta).  Default can be changed using diff.compute
+	config option.  See COMPARISON METHODS section for more info.
 
 -p::
 --period::
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 181ff996e039..4b4004d41c6a 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -86,7 +86,7 @@ const char *compute_names[COMPUTE_MAX] = {
 	[COMPUTE_WEIGHTED_DIFF] = "wdiff",
 };
 
-static int compute;
+static int compute = COMPUTE_DELTA;
 
 static int compute_2_hpp[COMPUTE_MAX] = {
 	[COMPUTE_DELTA]		= PERF_HPP_DIFF__DELTA,
@@ -1299,6 +1299,20 @@ static int diff__config(const char *var, const char *value,
 		sort_compute = perf_config_int(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "diff.compute")) {
+		if (!strcmp(value, "delta"))
+			compute = COMPUTE_DELTA;
+		else if (!strcmp(value, "delta-abs"))
+			compute = COMPUTE_DELTA_ABS;
+		else if (!strcmp(value, "ratio"))
+			compute = COMPUTE_RATIO;
+		else if (!strcmp(value, "wdiff"))
+			compute = COMPUTE_WEIGHTED_DIFF;
+		else {
+			pr_err("Invalid compute method: %s\n", value);
+			return -1;
+		}
+	}
 
 	return 0;
 }
-- 
2.11.0

  parent reply	other threads:[~2017-02-06  7:23 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-06  7:20 [PATCHSET 0/3] perf diff: Introduce delta-abs compute method Namhyung Kim
2017-02-06  7:20 ` [PATCH 1/3] perf diff: Add 'delta-abs' " Namhyung Kim
2017-02-06  7:20 ` [PATCH 2/3] perf diff: Add diff.order config option Namhyung Kim
2017-02-06  9:44   ` Taeung Song
2017-02-06 13:41     ` Namhyung Kim
2017-02-06  7:20 ` Namhyung Kim [this message]
2017-02-06 10:26 ` [PATCHSET 0/3] perf diff: Introduce delta-abs compute method Jiri Olsa
2017-02-06 13:44   ` Namhyung Kim
2017-02-06 14:14     ` Arnaldo Carvalho de Melo
2017-02-06 12:51 ` Arnaldo Carvalho de Melo
2017-02-06 14:26   ` Namhyung Kim
2017-02-07 16:02     ` Arnaldo Carvalho de Melo
2017-02-10  7:26       ` Namhyung Kim

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