[tip:perfcounters/core] perf report: Separate out idle threads

tip-bot for Peter Zijlstra
2009-06-02T20:19:15Z

Commit-ID: 436224a6d8bb3e29fe0cc18122f8d1f593da67b8
Gitweb: http://git.kernel.org/tip/436224a6d8bb3e29fe0cc18122f8d1f593da67b8
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Tue, 2 Jun 2009 21:02:36 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 2 Jun 2009 21:45:34 +0200

perf report: Separate out idle threads

Introduce the special comm name [idle] for idle theads.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
Documentation/perf_counter/builtin-report.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index 19c1e05..6d68f3a 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -612,6 +612,17 @@ static size_t output__fprintf(FILE *fp, uint64_t total_samples)
return ret;
}

+static void register_idle_thread(void)
+{
+ struct thread *thread = threads__findnew(0);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, "[idle]")) {
+ fprintf(stderr, "problem inserting idle task.\n");
+ exit(-1);
+ }
+}
+

static int __cmd_report(void)
{
@@ -626,6 +637,8 @@ static int __cmd_report(void)
char cwd[PATH_MAX], *cwdp = cwd;
int cwdlen;

+ register_idle_thread();
+
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");