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Commit 6a989056 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: Ia728ecbc780c9d172b49029ef3c87c6b3b490872
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent a2fc4c1e

include/linux/sched/sysctl.h

+1 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ extern unsigned int sysctl_sched_ravg_window_nr_ticks; 
extern unsigned int sysctl_sched_dynamic_ravg_window_enable;

extern unsigned int sysctl_sched_prefer_spread;

extern unsigned int sysctl_walt_rtg_cfs_boost_prio;

extern unsigned int sysctl_walt_low_latency_task_boost;



extern int

walt_proc_group_thresholds_handler(struct ctl_table *table, int write,

kernel/sched/fair.c

+2 −1
Original line number Diff line number Diff line
@@ -177,6 +177,7 @@ unsigned int sysctl_sched_min_task_util_for_boost = 51; 
unsigned int sysctl_sched_min_task_util_for_colocation = 35;

__read_mostly unsigned int sysctl_sched_prefer_spread;

unsigned int sysctl_walt_rtg_cfs_boost_prio = 99; /* disabled by default */

unsigned int sysctl_walt_low_latency_task_boost; /* disabled by default */

#endif

unsigned int sched_small_task_threshold = 102;
@@ -4136,7 +4137,7 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) 
						TASK_BOOST_STRICT_MAX)

				vruntime -= sysctl_sched_latency;

#ifdef CONFIG_SCHED_WALT

			else if (task_of(se)->low_latency ||

			else if (walt_low_latency_task(task_of(se)) ||

					task_rtg_high_prio(task_of(se))) {

				vruntime -= sysctl_sched_latency;

				vruntime -= thresh;

kernel/sched/sched.h

+5 −0
Original line number Diff line number Diff line
@@ -2903,6 +2903,11 @@ static inline bool task_rtg_high_prio(struct task_struct *p) 
		(p->prio <= sysctl_walt_rtg_cfs_boost_prio);

}



static inline bool walt_low_latency_task(struct task_struct *p)

{

	return sysctl_walt_low_latency_task_boost && p->low_latency;

}



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

static inline int same_freq_domain(int src_cpu, int dst_cpu)

{

kernel/sysctl.c

+9 −0
Original line number Diff line number Diff line
@@ -579,6 +579,15 @@ static struct ctl_table kern_table[] = { 
		.extra1		= &min_cfs_boost_prio,

		.extra2		= &max_cfs_boost_prio,

	},

	{

		.procname	= "walt_low_latency_task_boost",

		.data		= &sysctl_walt_low_latency_task_boost,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler   = proc_dointvec_minmax,

		.extra1		= &zero,

		.extra2		= &one,

	},

#endif

#ifdef CONFIG_SCHED_DEBUG

	{