linux-kernel - [PATCH 7/8] perf: Add a perf record --timechart option

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Date:	Sat, 12 Sep 2009 13:06:45 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	linux-kernel@...r.kernel.org
Cc:	Arjan van de Ven <arjan@...radead.org>, mingo@...e.hu,
	fweisbec@...il.com, peterz@...radead.org
Subject: [PATCH 7/8] perf: Add a perf record --timechart option

>From 2f2ee48c6cbf556724929c55b6c0842f737e9658 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@...ux.intel.com>
Date: Sat, 12 Sep 2009 12:52:13 +0200
Subject: [PATCH] perf: Add a perf record --timechart option

This patch adds a "perf record --timechart" option, to make it easy
to capture traces for use by the timechart tool.

Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com>
---
 tools/perf/builtin-record.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 99a12fe..f06a447 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -47,6 +47,7 @@ static int			append_file			= 0;
 static int			call_graph			= 0;
 static int			inherit_stat			= 0;
 static int			no_samples			= 0;
+static int			timechart			= 0;
 static int			sample_address			= 0;
 
 static long			samples;
@@ -385,6 +386,12 @@ static void create_counter(int counter, int cpu, pid_t pid)
 
 	attr->sample_type	|= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
 
+	if (timechart) {
+		attr->sample_type |= PERF_SAMPLE_CPU;
+		attr->sample_type |= PERF_SAMPLE_TIME;
+		attr->sample_type |= PERF_SAMPLE_RAW;
+	}
+
 	if (freq) {
 		attr->sample_type	|= PERF_SAMPLE_PERIOD;
 		attr->freq		= 1;
@@ -637,6 +644,24 @@ static int __cmd_record(int argc, const char **argv)
 	return 0;
 }
 
+static int do_timechart(const struct option *opt __used, const char *str __used, int unset __used)
+{
+	parse_events(NULL, "power:power_start", 0);
+	parse_events(NULL, "power:power_end", 0);
+	parse_events(NULL, "power:power_frequency", 0);
+	parse_events(NULL, "sched:sched_wakeup", 0);
+	parse_events(NULL, "sched:sched_switch", 0);
+	default_interval = 1;
+	system_wide = 1;
+	timechart = 1;
+	if (!nr_counters) {
+		printf("No counters found.. is debugfs mounted?\n");
+		exit(0);
+	}
+	return 0;
+}
+
+
 static const char * const record_usage[] = {
 	"perf record [<options>] [<command>]",
 	"perf record [<options>] -- <command> [<options>]",
@@ -681,6 +706,9 @@ static const struct option options[] = {
 		    "Sample addresses"),
 	OPT_BOOLEAN('n', "no-samples", &no_samples,
 		    "don't sample"),
+	OPT_CALLBACK_NOOPT('t', "timechart", NULL, NULL,
+		     "create a timechart recording",
+		     do_timechart),
 	OPT_END()
 };
 
-- 
1.6.0.6




-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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