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Commit 6b9b3223 authored by Lingutla Chandrasekhar's avatar Lingutla Chandrasekhar Committed by Srinivasarao Pathipati
Browse files

sched: Improve the scheduler 



This change is for general scheduler improvements.

Change-Id: I37d6cb75ca8b08d9ca155b86b7d71ff369f46e14
Signed-off-by: default avatarLingutla Chandrasekhar <clingutla@codeaurora.org>
Signed-off-by: default avatarSrinivasarao Pathipati <quic_spathi@quicinc.com>
parent 7865c5e4

kernel/sched/core.c

+5 −1
Original line number Diff line number Diff line
@@ -3817,8 +3817,12 @@ void scheduler_tick(void) 
	if (curr->sched_class == &fair_sched_class)

		check_for_migration(rq, curr);



	if (idle_cpu(cpu) && is_reserved(cpu))

#ifdef CONFIG_SMP

	rq_lock(rq, &rf);

	if (idle_cpu(cpu) && is_reserved(cpu) && !rq->active_balance)

		clear_reserved(cpu);

	rq_unlock(rq, &rf);

#endif



}

kernel/sched/fair.c

+16 −1
Original line number Diff line number Diff line
@@ -12838,12 +12838,23 @@ static void walt_rotate_work_func(struct work_struct *work) 
{

	struct walt_rotate_work *wr = container_of(work,

					struct walt_rotate_work, w);

	struct rq *src_rq = cpu_rq(wr->src_cpu), *dst_rq = cpu_rq(wr->dst_cpu);

	unsigned long flags;



	migrate_swap(wr->src_task, wr->dst_task, wr->dst_cpu, wr->src_cpu);



	put_task_struct(wr->src_task);

	put_task_struct(wr->dst_task);



	local_irq_save(flags);

	double_rq_lock(src_rq, dst_rq);



	dst_rq->active_balance = 0;

	src_rq->active_balance = 0;



	double_rq_unlock(src_rq, dst_rq);

	local_irq_restore(flags);



	clear_reserved(wr->src_cpu);

	clear_reserved(wr->dst_cpu);

}
@@ -12930,7 +12941,8 @@ static void walt_check_for_rotation(struct rq *src_rq) 
	dst_rq = cpu_rq(dst_cpu);



	double_rq_lock(src_rq, dst_rq);

	if (dst_rq->curr->sched_class == &fair_sched_class) {

	if (dst_rq->curr->sched_class == &fair_sched_class &&

		!src_rq->active_balance && !dst_rq->active_balance) {

		get_task_struct(src_rq->curr);

		get_task_struct(dst_rq->curr);
@@ -12943,7 +12955,10 @@ static void walt_check_for_rotation(struct rq *src_rq) 


		wr->src_cpu = src_cpu;

		wr->dst_cpu = dst_cpu;

		dst_rq->active_balance = 1;

		src_rq->active_balance = 1;

	}



	double_rq_unlock(src_rq, dst_rq);



	if (wr)