From bb3469ac9b50f14ad6eba129ca0ad4fd033097a0 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 27 Jun 2008 13:41:27 +0200 Subject: [PATCH] sched: hierarchical load vs affine wakeups With hierarchical grouping we can't just compare task weight to rq weight - we need to scale the weight appropriately. Signed-off-by: Peter Zijlstra Cc: Srivatsa Vaddagiri Cc: Mike Galbraith Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 7b8d664d6f22..865cb53a7ccf 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1073,6 +1073,25 @@ static inline int wake_idle(int cpu, struct task_struct *p) static const struct sched_class fair_sched_class; +#ifdef CONFIG_FAIR_GROUP_SCHED +static unsigned long task_h_load(struct task_struct *p) +{ + unsigned long h_load = p->se.load.weight; + struct cfs_rq *cfs_rq = cfs_rq_of(&p->se); + + update_h_load(task_cpu(p)); + + h_load = calc_delta_mine(h_load, cfs_rq->h_load, &cfs_rq->load); + + return h_load; +} +#else +static unsigned long task_h_load(struct task_struct *p) +{ + return p->se.load.weight; +} +#endif + static int wake_affine(struct rq *rq, struct sched_domain *this_sd, struct rq *this_rq, struct task_struct *p, int prev_cpu, int this_cpu, int sync, @@ -1093,9 +1112,9 @@ wake_affine(struct rq *rq, struct sched_domain *this_sd, struct rq *this_rq, * of the current CPU: */ if (sync) - tl -= current->se.load.weight; + tl -= task_h_load(current); - balanced = 100*(tl + p->se.load.weight) <= imbalance*load; + balanced = 100*(tl + task_h_load(p)) <= imbalance*load; /* * If the currently running task will sleep within -- 2.30.2