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authorAndrew Vagin <avagin@openvz.org>2011-11-11 17:04:00 +0300
committerIngo Molnar <mingo@elte.hu>2011-11-16 08:48:24 +0100
commita3e5d1091c1298ded486aba87c22fe90cb55ea6c (patch)
tree1db19d4ad6908411d9a0eeeaa86015d3152ba31f /kernel/sched.c
parentf4d6f6c2649c2c47261db4dcc3110d6f22202ea2 (diff)
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sched: Don't call task_group() too many times in set_task_rq()
It improves perfomance, especially if autogroup is enabled. The size of set_task_rq() was 0x180 and now it is 0xa0. Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Paul Turner <pjt@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1321020240-3874331-1-git-send-email-avagin@openvz.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 0df69866a04e..c9e3ab6e299e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -793,14 +793,18 @@ static inline struct task_group *task_group(struct task_struct *p)
/* Change a task's cfs_rq and parent entity if it moves across CPUs/groups */
static inline void set_task_rq(struct task_struct *p, unsigned int cpu)
{
+#if defined(CONFIG_FAIR_GROUP_SCHED) || defined(CONFIG_RT_GROUP_SCHED)
+ struct task_group *tg = task_group(p);
+#endif
+
#ifdef CONFIG_FAIR_GROUP_SCHED
- p->se.cfs_rq = task_group(p)->cfs_rq[cpu];
- p->se.parent = task_group(p)->se[cpu];
+ p->se.cfs_rq = tg->cfs_rq[cpu];
+ p->se.parent = tg->se[cpu];
#endif
#ifdef CONFIG_RT_GROUP_SCHED
- p->rt.rt_rq = task_group(p)->rt_rq[cpu];
- p->rt.parent = task_group(p)->rt_se[cpu];
+ p->rt.rt_rq = tg->rt_rq[cpu];
+ p->rt.parent = tg->rt_se[cpu];
#endif
}