diff options
| author | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:04 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:04 +0200 |
| commit | 6cb58195143b55d4c427d92f8425bec2b0d9c56c (patch) | |
| tree | 80727312684fe2be27c2c6202a42fff1915f9599 | |
| parent | bf5c91ba8c629b84413c761f529627195fd0a935 (diff) | |
sched: optimize vruntime based scheduling
optimize vruntime based scheduling.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/sched.c | 5 | ||||
| -rw-r--r-- | kernel/sched_fair.c | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index a5dd03522e3..5594e65166f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -732,13 +732,14 @@ calc_delta_fair(unsigned long delta_exec, struct load_weight *lw) static inline void update_load_add(struct load_weight *lw, unsigned long inc) { lw->weight += inc; - lw->inv_weight = WMULT_CONST / lw->weight; + if (sched_feat(FAIR_SLEEPERS)) + lw->inv_weight = WMULT_CONST / lw->weight; } static inline void update_load_sub(struct load_weight *lw, unsigned long dec) { lw->weight -= dec; - if (likely(lw->weight)) + if (sched_feat(FAIR_SLEEPERS) && likely(lw->weight)) lw->inv_weight = WMULT_CONST / lw->weight; } diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index a566a455816..7041dc69785 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -336,6 +336,9 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, } curr->vruntime += delta_exec_weighted; + if (!sched_feat(FAIR_SLEEPERS)) + return; + if (unlikely(!load)) return; |