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Commit df825be6 authored by Kishore Sri venkata Ganesh Bolisetty's avatar Kishore Sri venkata Ganesh Bolisetty
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sched/walt: Improve the scheduler 



The change is for general scheduler improvement.

Change-Id: Ib5d58c23d3a67a81d682e08e58f308e5c659a7f8
Signed-off-by: default avatarKishore Sri venkata Ganesh Bolisetty <bsrivenk@codeaurora.org>
parent 08db65b8

kernel/sched/fair.c

+14 −3
Original line number Diff line number Diff line
@@ -4091,13 +4091,24 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) 
		vruntime -= thresh;

#ifdef CONFIG_SCHED_WALT

		if (entity_is_task(se)) {

			if (task_rtg_high_prio(task_of(se)) ||

					walt_procfs_low_latency_task(task_of(se))) {

				vruntime -= thresh;

				se->vruntime = vruntime;

			}

			if (walt_binder_low_latency_task(task_of(se))) {

				vruntime -= sysctl_sched_latency;

				se->vruntime = vruntime;

			}

			if (per_task_boost(task_of(se)) == TASK_BOOST_STRICT_MAX) {

				vruntime -= thresh;

				vruntime -= sysctl_sched_latency;

				se->vruntime = vruntime;

			}

			if ((per_task_boost(task_of(se)) ==

					TASK_BOOST_STRICT_MAX) ||

					walt_low_latency_task(task_of(se)) ||

					task_rtg_high_prio(task_of(se))) {

				vruntime -= sysctl_sched_latency;

				vruntime -= thresh;

				se->vruntime = vruntime;

				return;

			}

		}

kernel/sched/sched.h

+12 −0
Original line number Diff line number Diff line
@@ -3011,6 +3011,18 @@ static inline bool walt_low_latency_task(struct task_struct *p) 
		(task_util(p) < sysctl_walt_low_latency_task_threshold);

}



static inline bool walt_binder_low_latency_task(struct task_struct *p)

{

	return (p->wts.low_latency & WALT_LOW_LATENCY_BINDER) &&

		(task_util(p) < sysctl_walt_low_latency_task_threshold);

}



static inline bool walt_procfs_low_latency_task(struct task_struct *p)

{

	return (p->wts.low_latency & WALT_LOW_LATENCY_PROCFS) &&

		(task_util(p) < sysctl_walt_low_latency_task_threshold);

}



/* Is frequency of two cpus synchronized with each other? */

static inline int same_freq_domain(int src_cpu, int dst_cpu)

{