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Commit eb11578c authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: Id1692f724f2efd22ada3365cebd154f1999930b5
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent 122f4cad

include/linux/sched/sysctl.h

+1 −1
Original line number Diff line number Diff line
@@ -56,7 +56,7 @@ extern unsigned int __weak sysctl_sched_many_wakeup_threshold; 
extern unsigned int __weak 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 unsigned int sysctl_walt_low_latency_task_threshold;



extern int

walt_proc_group_thresholds_handler(struct ctl_table *table, int write,

include/trace/events/sched.h

+1 −1
Original line number Diff line number Diff line
@@ -1052,7 +1052,7 @@ TRACE_EVENT(sched_task_util, 
		__entry->cpus_allowed		=

					cpumask_bits(&p->cpus_mask)[0];

		__entry->task_boost		= per_task_boost(p);

		__entry->low_latency		= p->wts.low_latency;

		__entry->low_latency		= walt_low_latency_task(p);

	),



	TP_printk("pid=%d comm=%s util=%lu prev_cpu=%d candidates=%#lx best_energy_cpu=%d sync=%d need_idle=%d fastpath=%d placement_boost=%d latency=%llu stune_boosted=%d is_rtg=%d rtg_skip_min=%d start_cpu=%d unfilter=%u affinity=%lx task_boost=%d low_latency=%d",

kernel/sched/fair.c

+1 −1
Original line number Diff line number Diff line
@@ -135,7 +135,7 @@ unsigned int sched_capacity_margin_down[NR_CPUS] = { 
#ifdef CONFIG_SCHED_WALT

__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 */

unsigned int sysctl_walt_low_latency_task_threshold; /* disabled by default */

#endif

unsigned int sched_small_task_threshold = 102;

kernel/sched/sched.h

+2 −1
Original line number Diff line number Diff line
@@ -3006,7 +3006,8 @@ static inline struct walt_related_thread_group 


static inline bool walt_low_latency_task(struct task_struct *p)

{

	return sysctl_walt_low_latency_task_boost && p->wts.low_latency;

	return p->wts.low_latency &&

		(task_util(p) < sysctl_walt_low_latency_task_threshold);

}



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

kernel/sysctl.c

+3 −3
Original line number Diff line number Diff line
@@ -564,13 +564,13 @@ static struct ctl_table kern_table[] = { 
		.extra2		= &max_cfs_boost_prio,

	},

	{

		.procname	= "walt_low_latency_task_boost",

		.data		= &sysctl_walt_low_latency_task_boost,

		.procname	= "walt_low_latency_task_threshold",

		.data		= &sysctl_walt_low_latency_task_threshold,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= SYSCTL_ZERO,

		.extra2		= SYSCTL_ONE,

		.extra2		= &one_thousand,

	},

#endif

#ifdef CONFIG_SCHED_DEBUG