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Commit 6cb58195 authored Oct 15, 2007 by Ingo Molnar

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>

parent bf5c91ba

kernel/sched.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -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;
		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;
		}

kernel/sched_fair.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;