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Commit c8928333 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched/fair: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I15c01c20691899053e0aa760923ba0db644f2b73
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent 04d07a9b

kernel/sched/fair.c

+10 −2
Original line number Diff line number Diff line
@@ -5848,7 +5848,7 @@ static unsigned long __cpu_norm_util(unsigned long util, unsigned long capacity) 
}



static inline bool

bias_to_waker_cpu(struct task_struct *p, int cpu, struct cpumask *rtg_target)

bias_to_this_cpu(struct task_struct *p, int cpu, struct cpumask *rtg_target)

{

	bool base_test = cpumask_test_cpu(cpu, &p->cpus_allowed) &&

			cpu_active(cpu) && task_fits_max(p, cpu);
@@ -7469,6 +7469,7 @@ enum fastpaths { 
	NONE = 0,

	SYNC_WAKEUP,

	PREV_CPU_FASTPATH,

	MANY_WAKEUP,

};



static inline int find_best_target(struct task_struct *p, int *backup_cpu,
@@ -8181,12 +8182,19 @@ static int find_energy_efficient_cpu(struct sched_domain *sd, 
		sync = 0;



	if (sysctl_sched_sync_hint_enable && sync &&

				bias_to_waker_cpu(p, cpu, rtg_target)) {

				bias_to_this_cpu(p, cpu, rtg_target)) {

		target_cpu = cpu;

		fbt_env.fastpath = SYNC_WAKEUP;

		goto out;

	}



	if (is_many_wakeup(sibling_count_hint) && prev_cpu != cpu &&

				bias_to_this_cpu(p, prev_cpu, rtg_target)) {

		target_cpu = prev_cpu;

		fbt_env.fastpath = MANY_WAKEUP;

		goto out;

	}



	/* prepopulate energy diff environment */

	eenv = get_eenv(p, prev_cpu);

	if (eenv->max_cpu_count < 2)