linux-kernel - [tip:perfcounters/core] perf record: Explicity program a default counter

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Date:	Fri, 12 Jun 2009 12:43:04 GMT
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, paulus@...ba.org,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	efault@....de, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perfcounters/core] perf record: Explicity program a default counter

Commit-ID:  bbd36e5e6aa6f1757c84cdb406b6eb81686d14af
Gitweb:     http://git.kernel.org/tip/bbd36e5e6aa6f1757c84cdb406b6eb81686d14af
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Thu, 11 Jun 2009 23:11:50 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 12 Jun 2009 14:28:52 +0200

perf record: Explicity program a default counter

Up until now record has worked on the assumption that type=0, config=0
was a suitable configuration - which it is. Lets make this a little more
explicit and more readable via the use of proper symbols.

[ Impact: cleanup ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-record.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 29259e7..0f5771f 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -568,8 +568,11 @@ int cmd_record(int argc, const char **argv, const char *prefix)
 	if (!argc && target_pid == -1 && !system_wide)
 		usage_with_options(record_usage, options);
 
-	if (!nr_counters)
-		nr_counters = 1;
+	if (!nr_counters) {
+		nr_counters	= 1;
+		attrs[0].type	= PERF_TYPE_HARDWARE;
+		attrs[0].config = PERF_COUNT_HW_CPU_CYCLES;
+	}
 
 	for (counter = 0; counter < nr_counters; counter++) {
 		if (attrs[counter].sample_period)
--
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