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

[tip-bot for Peter Zijlstra]

Commit-ID:  436224a6d8bb3e29fe0cc18122f8d1f593da67b8
Gitweb:     http://git.kernel.org/tip/436224a6d8bb3e29fe0cc18122f8d1f593da67b8
Author:     Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Tue, 2 Jun 2009 21:02:36 +0200
Committer:  Ingo Molnar <mingo@xxxxxxx>
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@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: John Kacur <jkacur@xxxxxxxxxx>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 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");
--
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