diff options
| author | Ingo Molnar <mingo@elte.hu> | 2008-03-17 09:36:53 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:57 +0200 |
| commit | d25ce4cd499a21aab89ff8755f8c4a2800eae25f (patch) | |
| tree | a70f58303a4b1fabfffbf097188a6c67a888ee0e | |
| parent | 1fc8afa4c820fcde3658238eab5c010476ede521 (diff) | |
sched: cache hot buddy
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 7c5efad78c09..42d2f1155d30 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -625,20 +625,22 @@ enum { SCHED_FEAT_NEW_FAIR_SLEEPERS = 1, SCHED_FEAT_WAKEUP_PREEMPT = 2, SCHED_FEAT_START_DEBIT = 4, - SCHED_FEAT_HRTICK = 8, - SCHED_FEAT_DOUBLE_TICK = 16, - SCHED_FEAT_SYNC_WAKEUPS = 32, - SCHED_FEAT_AFFINE_WAKEUPS = 64, + SCHED_FEAT_AFFINE_WAKEUPS = 8, + SCHED_FEAT_CACHE_HOT_BUDDY = 16, + SCHED_FEAT_HRTICK = 32, + SCHED_FEAT_DOUBLE_TICK = 64, + SCHED_FEAT_SYNC_WAKEUPS = 128, }; const_debug unsigned int sysctl_sched_features = SCHED_FEAT_NEW_FAIR_SLEEPERS * 1 | SCHED_FEAT_WAKEUP_PREEMPT * 1 | SCHED_FEAT_START_DEBIT * 1 | + SCHED_FEAT_AFFINE_WAKEUPS * 1 | + SCHED_FEAT_CACHE_HOT_BUDDY * 1 | SCHED_FEAT_HRTICK * 1 | SCHED_FEAT_DOUBLE_TICK * 0 | - SCHED_FEAT_SYNC_WAKEUPS * 0 | - SCHED_FEAT_AFFINE_WAKEUPS * 1; + SCHED_FEAT_SYNC_WAKEUPS * 0; #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x) @@ -1519,7 +1521,7 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd) /* * Buddy candidates are cache hot: */ - if (&p->se == cfs_rq_of(&p->se)->next) + if (sched_feat(CACHE_HOT_BUDDY) && (&p->se == cfs_rq_of(&p->se)->next)) return 1; if (p->sched_class != &fair_sched_class) |