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

tip-bot for Peter Zijlstra
2009-06-12T12:44:04Z

Commit-ID: bbd36e5e6aa6f1757c84cdb406b6eb81686d14af
Gitweb: http://git.kernel.org/tip/bbd36e5e6aa6f1757c84cdb406b6eb81686d14af
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Thu, 11 Jun 2009 23:11:50 +0200
Committer: Ingo Molnar <mingo@elte.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@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.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)