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authorIngo Molnar <mingo@elte.hu>2008-03-15 12:10:34 -0400
committerIngo Molnar <mingo@elte.hu>2008-03-18 23:27:53 -0400
commitf540a6080a092e2ab69fd146c308022db7347b0a (patch)
tree12dda1ecd63adb17cf06db61712a113cf6990037 /kernel
parent4ae7d5cefd4aa3560e359a3b0f03e12adc8b5c86 (diff)
sched: wakeup-buddy tasks are cache-hot
Wakeup-buddy tasks are cache-hot - this makes it a bit harder for the load-balancer to tear them apart. (but it's still possible, if the load is sufficiently assymetric) Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index adbd475cfd25..3f7c5eb254e2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1396,6 +1396,12 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
1396{ 1396{
1397 s64 delta; 1397 s64 delta;
1398 1398
1399 /*
1400 * Buddy candidates are cache hot:
1401 */
1402 if (&p->se == cfs_rq_of(&p->se)->next)
1403 return 1;
1404
1399 if (p->sched_class != &fair_sched_class) 1405 if (p->sched_class != &fair_sched_class)
1400 return 0; 1406 return 0;
1401 1407