[PATCH v5 6/7] sched: consider runnable load average in move_tasks

[Alex Shi]

Except using runnable load average in background, move_tasks is also
the key functions in load balance. We need consider the runnable load
average in it in order to the apple to apple load comparison.

Signed-off-by: Alex Shi <alex.shi@xxxxxxxxx>
---
 kernel/sched/fair.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 0bf88e8..790e23d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3966,6 +3966,12 @@ static unsigned long task_h_load(struct task_struct *p);
 
 static const unsigned int sched_nr_migrate_break = 32;
 
+static unsigned long task_h_load_avg(struct task_struct *p)
+{
+	return div_u64(task_h_load(p) * (u64)p->se.avg.runnable_avg_sum,
+			p->se.avg.runnable_avg_period + 1);
+}
+
 /*
  * move_tasks tries to move up to imbalance weighted load from busiest to
  * this_rq, as part of a balancing operation within domain "sd".
@@ -4001,7 +4007,7 @@ 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_avg(p);
 
 		if (sched_feat(LB_MIN) && load < 16 && !env->sd->nr_balance_failed)
 			goto next;
-- 
1.7.12

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