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Commit eb61a9d9 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar Committed by Satya Durga Srinivasu Prabhala
Browse files

sched/walt: improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I01e6610bba2e8c66a628d6289eeed4e854264fdd
Signed-off-by: default avatarSatya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent 8c856f2d

include/linux/sched/sysctl.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ extern unsigned int sysctl_sched_boost; 
extern unsigned int sysctl_sched_group_upmigrate_pct;

extern unsigned int sysctl_sched_group_downmigrate_pct;

extern unsigned int sysctl_sched_walt_rotate_big_tasks;

extern unsigned int sysctl_sched_min_task_util_for_boost_colocation;



extern int

walt_proc_update_handler(struct ctl_table *table, int write,

kernel/sched/fair.c

+8 −1
Original line number Diff line number Diff line
@@ -196,6 +196,11 @@ unsigned int sched_capacity_margin_up[NR_CPUS] = { 
unsigned int sched_capacity_margin_down[NR_CPUS] = {

			[0 ... NR_CPUS-1] = 1205}; /* ~15% margin */



#ifdef CONFIG_SCHED_WALT

/* 1ms default for 20ms window size scaled to 1024 */

unsigned int sysctl_sched_min_task_util_for_boost_colocation = 51;

#endif



static inline void update_load_add(struct load_weight *lw, unsigned long inc)

{

	lw->weight += inc;
@@ -7625,7 +7630,9 @@ static inline struct cpumask *find_rtg_target(struct task_struct *p) 
	rcu_read_lock();



	grp = task_related_thread_group(p);

	if (grp && grp->preferred_cluster) {

	if (grp && grp->preferred_cluster &&

			(task_util(p) >

			sysctl_sched_min_task_util_for_boost_colocation)) {

		rtg_target = &grp->preferred_cluster->cpus;

		if (!task_fits_max(p, cpumask_first(rtg_target)))

			rtg_target = NULL;

kernel/sched/sched.h

+11 −0
Original line number Diff line number Diff line
@@ -2906,6 +2906,17 @@ static inline bool task_boost_on_big_eligible(struct task_struct *p) 
	bool boost_on_big = task_sched_boost(p) &&

				sched_boost_policy() == SCHED_BOOST_ON_BIG;



	if (boost_on_big) {

		/*

		 * Filter out tasks less than min task util threshold

		 * under conservative boost.

		 */

		if (sysctl_sched_boost == CONSERVATIVE_BOOST &&

				task_util(p) <=

				sysctl_sched_min_task_util_for_boost_colocation)

			boost_on_big = false;

	}



	return boost_on_big;

}

kernel/sysctl.c

+9 −0
Original line number Diff line number Diff line
@@ -373,6 +373,15 @@ static struct ctl_table kern_table[] = { 
		.extra1		= &zero,

		.extra2		= &one,

	},

	{

		.procname	= "sched_min_task_util_for_boost_colocation",

		.data		= &sysctl_sched_min_task_util_for_boost_colocation,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &zero,

		.extra2		= &one_thousand,

	},

#endif

	{

		.procname	= "sched_upmigrate",