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Date: Sat, 17 Nov 2012 21:04:16 +0800 From: Alex Shi <alex.shi@...el.com> To: mingo@...hat.com, peterz@...radead.org, pjt@...gle.com, preeti@...ux.vnet.ibm.com, vincent.guittot@...aro.org Cc: linux-kernel@...r.kernel.org Subject: [RFC PATCH 4/5] sched: consider runnable load average in wake_affine and move_tasks Except using runnable load average in background, wake_affine and move_tasks is also the key functions in load balance. We need consider the runnable load average in them in order to the apple to apple load comparison in load balance. Signed-off-by: Alex Shi <alex.shi@...el.com> --- kernel/sched/fair.c | 16 ++++++++++------ 1 files changed, 10 insertions(+), 6 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f918919..7064a13 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3164,8 +3164,10 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) tg = task_group(current); weight = current->se.load.weight; - this_load += effective_load(tg, this_cpu, -weight, -weight); - load += effective_load(tg, prev_cpu, 0, -weight); + this_load += effective_load(tg, this_cpu, -weight, -weight) + * cpu_rq(this_cpu)->avg.load_avg_contrib; + load += effective_load(tg, prev_cpu, 0, -weight) + * cpu_rq(prev_cpu)->avg.load_avg_contrib; } tg = task_group(p); @@ -3185,12 +3187,14 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p, int sync) this_eff_load = 100; this_eff_load *= power_of(prev_cpu); - this_eff_load *= this_load + - effective_load(tg, this_cpu, weight, weight); + this_eff_load *= (this_load + + effective_load(tg, this_cpu, weight, weight)) + * cpu_rq(this_cpu)->avg.load_avg_contrib; prev_eff_load = 100 + (sd->imbalance_pct - 100) / 2; prev_eff_load *= power_of(this_cpu); - prev_eff_load *= load + effective_load(tg, prev_cpu, 0, weight); + prev_eff_load *= (load + effective_load(tg, prev_cpu, 0, weight)) + * cpu_rq(prev_cpu)->avg.load_avg_contrib; balanced = this_eff_load <= prev_eff_load; } else @@ -4229,7 +4233,7 @@ static int move_tasks(struct lb_env *env) if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) goto next; - load = task_h_load(p); + load = task_h_load(p) * p->se.avg.load_avg_contrib; if (sched_feat(LB_MIN) && load < 16 && !env->failed) goto next; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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