[tip:perfcounters/core] perf sched: Make idle thread and comm/pid names more consistent

tip-bot for Ingo Molnar
2009-09-16T10:26:36Z

Commit-ID: 80ed0987f363d7eb50193df3e6f6d71451f74bc3
Gitweb: http://git.kernel.org/tip/80ed0987f363d7eb50193df3e6f6d71451f74bc3
Author: Ingo Molnar <mingo@elte.hu>
AuthorDate: Wed, 16 Sep 2009 14:12:36 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 16 Sep 2009 12:15:47 +0200

perf sched: Make idle thread and comm/pid names more consistent

Peter noticed that we have 3 ways of referring to the idle thread:

[idle]:0
swapper:0
swapper-0

Standardize on 'swapper:0'.

Reported-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>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
tools/perf/builtin-sched.c | 4 ++--
tools/perf/util/thread.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 2d54236..da8f674 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1204,13 +1204,13 @@ static void output_lat_thread(struct work_atoms *work_list)
/*
* Ignore idle threads:
*/
- if (!work_list->thread->pid)
+ if (!strcmp(work_list->thread->comm, "swapper"))
return;

all_runtime += work_list->total_runtime;
all_count += work_list->nb_atoms;

- ret = printf(" %s-%d ", work_list->thread->comm, work_list->thread->pid);
+ ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid);

for (i = 0; i < 24 - ret; i++)
printf(" ");
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 7635928..12c4341 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -85,7 +85,7 @@ register_idle_thread(struct rb_root *threads, struct thread **last_match)
{
struct thread *thread = threads__findnew(0, threads, last_match);

- if (!thread || thread__set_comm(thread, "[init]")) {
+ if (!thread || thread__set_comm(thread, "swapper")) {
fprintf(stderr, "problem inserting idle task.\n");
exit(-1);
}