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Commit 32375398 authored by minaripenguin's avatar minaripenguin Committed by Harshit Jain
Browse files

sched: fair: Restrict prefer idle tasks with boosted check 



* only prefer idle core if task is boosted

Change-Id: I329aaf9bdd183df332e4b852396c1147836ce940
Signed-off-by: default avatarminaripenguin <minaripenguin@users.noreply.github.com>
parent 902cd454

kernel/sched/fair.c

+11 −5
Original line number Diff line number Diff line
@@ -5278,6 +5278,11 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags) 
	struct cfs_rq *cfs_rq;

	struct sched_entity *se = &p->se;

	int task_new = !(flags & ENQUEUE_WAKEUP);

    bool prefer_idle = sched_feat(EAS_PREFER_IDLE) ?

				    (schedtune_prefer_idle(p) > 0) : 0;

    int task_boost = per_task_boost(p);

	bool schedtune_boosted = schedtune_task_boost(p) > 0 ||

			    task_boost_policy(p) == SCHED_BOOST_ON_BIG;



#ifdef CONFIG_SCHED_WALT

	p->misfit = !task_fits_max(p, rq->cpu);
@@ -5313,7 +5318,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags) 
	 * utilization updates, so do it here explicitly with the IOWAIT flag

	 * passed.

	 */

	if (p->in_iowait)

	if (p->in_iowait && prefer_idle && schedtune_boosted)

		cpufreq_update_util(rq, SCHED_CPUFREQ_IOWAIT);



	for_each_sched_entity(se) {
@@ -5351,7 +5356,8 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags) 
	if (!se) {

		add_nr_running(rq, 1);

		inc_rq_walt_stats(rq, p);

		if (!task_new)

		if ((!task_new) &&

		    !(prefer_idle && schedtune_boosted && rq->nr_running == 1))

			update_overutilized_status(rq);

	}
@@ -7580,7 +7586,7 @@ static inline int find_best_target(struct task_struct *p, int *backup_cpu, 
			 * than the one required to boost the task.

			 */

			new_util = max(min_util, new_util);

			if (new_util > capacity_orig)

			if (new_util > capacity_orig && prefer_idle && boosted)

				continue;



			/*
@@ -7622,7 +7628,7 @@ static inline int find_best_target(struct task_struct *p, int *backup_cpu, 
			 * represent an optimal choice for latency sensitive

			 * tasks.

			 */

			if (prefer_idle) {

			if (prefer_idle && boosted) {



				/*

				 * Case A.1: IDLE CPU
@@ -8248,7 +8254,7 @@ static int find_energy_efficient_cpu(struct sched_domain *sd, 
			goto out;



		/* Immediately return a found idle CPU for a prefer_idle task */

		if (prefer_idle && idle_cpu(target_cpu))

		if (prefer_idle && boosted && idle_cpu(target_cpu))

			goto out;



#ifdef CONFIG_SCHED_WALT