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authorPeter Zijlstra <peterz@infradead.org>2013-03-14 10:48:39 +0100
committerIngo Molnar <mingo@kernel.org>2013-03-18 10:18:08 +0100
commita8d7ad52a7befbde896276d05c75c90fed48b5bf (patch)
tree6db764ea0c8db826b18d37828a1a28d014f38d3d /kernel/sched/core.c
parente75c8b475e4b1da6bf5b412db9a2ecd7c44188a2 (diff)
downloadlinaro-lsk-a8d7ad52a7befbde896276d05c75c90fed48b5bf.tar.gz
sched/tracing: Allow tracing the preemption decision on wakeup
Thomas noted that we do the wakeup preemption check after the wakeup trace point, this means the tracepoint cannot test/report this decision; which is rather important for latency sensitive workloads. Therefore move the tracepoint after doing the preemption check. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Paul Turner <pjt@google.com> Cc: Mike Galbraith <efault@gmx.de> Link: http://lkml.kernel.org/r/1363254519.26965.9.camel@laptop Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/core.c')
-rw-r--r--kernel/sched/core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b36635e7404..849deb96e61 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1288,8 +1288,8 @@ static void ttwu_activate(struct rq *rq, struct task_struct *p, int en_flags)
static void
ttwu_do_wakeup(struct rq *rq, struct task_struct *p, int wake_flags)
{
- trace_sched_wakeup(p, true);
check_preempt_curr(rq, p, wake_flags);
+ trace_sched_wakeup(p, true);
p->state = TASK_RUNNING;
#ifdef CONFIG_SMP