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From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@elte.hu>,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Roland McGrath <roland@redhat.com>,
	Nick Piggin <nickpiggin@yahoo.com.au>,
	Steven Rostedt <srostedt@redhat.com>
Subject: [PATCH 4/5] sched: remove unlikelys from sched_move_task
Date: Wed, 25 Mar 2009 01:19:24 -0400	[thread overview]
Message-ID: <20090325052023.653380725@goodmis.org> (raw)
In-Reply-To: 20090325051920.406564281@goodmis.org

[-- Attachment #1: 0004-sched-remove-unlikelys-from-sched_move_task.patch --]
[-- Type: text/plain, Size: 1260 bytes --]

From: Steven Rostedt <rostedt@goodmis.org>

Impact: clean up

We seem to be moving running tasks more than non running tasks.
I guess tasks like to move themselves.

These are also candidates for likely:

 correct incorrect  %        Function                  File              Line
 ------- ---------  -        --------                  ----              ----
       0    10027 100 sched_move_task                sched.c              8918
       0    10027 100 sched_move_task                sched.c              8908

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/sched.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 8e2558c..5a60745 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -8905,7 +8905,7 @@ void sched_move_task(struct task_struct *tsk)
 
 	if (on_rq)
 		dequeue_task(rq, tsk, 0);
-	if (unlikely(running))
+	if (running)
 		tsk->sched_class->put_prev_task(rq, tsk);
 
 	set_task_rq(tsk, task_cpu(tsk));
@@ -8915,7 +8915,7 @@ void sched_move_task(struct task_struct *tsk)
 		tsk->sched_class->moved_group(tsk);
 #endif
 
-	if (unlikely(running))
+	if (running)
 		tsk->sched_class->set_curr_task(rq);
 	if (on_rq)
 		enqueue_task(rq, tsk, 0);
-- 
1.6.2

-- 

  parent reply	other threads:[~2009-03-25  5:21 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-25  5:19 [PATCH 0/5] [PATCH][GIT PULL] remove unnecessary (un)likelys Steven Rostedt
2009-03-25  5:19 ` [PATCH 1/5] ptrace: remove incorrect unlikelys Steven Rostedt
2009-03-25  7:21   ` Ingo Molnar
2009-03-25 13:31     ` Christian Borntraeger
2009-03-25 13:42     ` Steven Rostedt
2009-03-25  9:28   ` Roland McGrath
2009-03-25  5:19 ` [PATCH 2/5] mm: remove unlikly NULL from kfree Steven Rostedt
2009-03-25  7:34   ` Pekka Enberg
2009-03-25  7:50     ` Thomas Gleixner
2009-03-25  8:01       ` Pekka Enberg
2009-03-25 21:20       ` Andrew Morton
2009-03-25  8:02     ` Hua Zhong
2009-03-25  8:06       ` Pekka Enberg
2009-03-25 13:51         ` Pekka Enberg
2009-03-25 14:47           ` Steven Rostedt
2009-03-25 14:59             ` Pekka Enberg
2009-03-25 15:04               ` Steven Rostedt
2009-03-25 15:08                 ` Steven Rostedt
2009-03-25 16:14                   ` Matt Mackall
2009-03-25 16:34                     ` Steven Rostedt
2009-03-25 20:26                       ` Jeremy Fitzhardinge
2009-03-25 21:09                         ` Matt Mackall
2009-03-25 21:01                       ` Matt Mackall
2009-03-25 21:24                         ` Steven Rostedt
2009-03-25 15:27             ` Steven Rostedt
2009-03-26 16:10           ` Al Viro
2009-03-26 16:15             ` Andrew Morton
2009-03-25  5:19 ` [PATCH 3/5] sched: remove unlikely in pre_schedule_rt Steven Rostedt
2009-03-25  5:24   ` Steven Rostedt
2009-03-25  5:19 ` Steven Rostedt [this message]
2009-03-25  5:19 ` [PATCH 5/5] mm: remove unlikelys for unlock in rmap.c Steven Rostedt
2009-04-24 11:12   ` KOSAKI Motohiro
2009-04-24 12:15     ` Lee Schermerhorn
2009-03-25  7:19 ` [PATCH 0/5] [PATCH][GIT PULL] remove unnecessary (un)likelys Ingo Molnar
2009-03-25  7:25 ` Ingo Molnar
2009-03-25 13:43   ` Steven Rostedt
2009-04-27 16:30 ` Daniel Walker

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