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Commit 5a24ce9d authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I30b3899e191d880e741f922323d0826b5c292498
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent dfd45fa0

kernel/sched/fair.c

+15 −4
Original line number Diff line number Diff line
@@ -6573,16 +6573,25 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus, 
	int prev_cpu = task_cpu(p);

	int unisolated_candidate = -1;

	int order_index = fbt_env->order_index, end_index = fbt_env->end_index;

	int stop_index = INT_MAX;

	int cluster;

	unsigned int target_nr_rtg_high_prio = UINT_MAX;

	bool rtg_high_prio_task = task_rtg_high_prio(p);

	cpumask_t visit_cpus;

	bool io_task_pack = (order_index > 0 && p->wts.iowaited);



	/* Find start CPU based on boost value */

	start_cpu = fbt_env->start_cpu;



	if (fbt_env->strict_max || io_task_pack)

	/*

	 * For higher capacity worth I/O tasks, stop the search

	 * at the end of higher capacity cluster(s).

	 */

	if (order_index > 0 && p->wts.iowaited) {

		stop_index = num_sched_clusters - 2;

		most_spare_wake_cap = LONG_MIN;

	}



	if (fbt_env->strict_max)

		target_max_spare_cap = LONG_MIN;



	if (p->state == TASK_RUNNING)
@@ -6668,8 +6677,7 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus, 
			 * than the one required to boost the task.

			 */

			new_util = max(min_util, new_util);

			if (!(fbt_env->strict_max || io_task_pack) &&

					new_util > capacity_orig)

			if (!fbt_env->strict_max && new_util > capacity_orig)

				continue;



			/*
@@ -6760,6 +6768,9 @@ static void walt_find_best_target(struct sched_domain *sd, cpumask_t *cpus, 
		if ((cluster >= end_index) && (target_cpu != -1) &&

			walt_target_ok(target_cpu, order_index))

			break;



		if (most_spare_cap_cpu != -1 && cluster >= stop_index)

			break;

	}



	walt_adjust_cpus_for_packing(p, &target_cpu, &best_idle_cpu,