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Commit c81d9cc6 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: Iabcf202a551861f848c36dcd145f5bfb493a02ca
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent c0835c6a

kernel/sched/boost.c

+2 −0
Original line number Diff line number Diff line
@@ -78,10 +78,12 @@ static void sched_full_throttle_boost_exit(void) 
static void sched_conservative_boost_enter(void)

{

	update_cgroup_boost_settings();

	sched_task_filter_util = sysctl_sched_min_task_util_for_boost;

}



static void sched_conservative_boost_exit(void)

{

	sched_task_filter_util = sysctl_sched_min_task_util_for_colocation;

	restore_cgroup_boost_settings();

}

kernel/sched/fair.c

+2 −5
Original line number Diff line number Diff line
@@ -186,6 +186,7 @@ unsigned int sched_capacity_margin_down[NR_CPUS] = { 
unsigned int sysctl_sched_min_task_util_for_boost = 51;

/* 0.68ms default for 20ms window size scaled to 1024 */

unsigned int sysctl_sched_min_task_util_for_colocation = 35;

unsigned int sched_task_filter_util = 35;

#endif

unsigned int sched_small_task_threshold = 102;
@@ -7384,11 +7385,7 @@ static inline int wake_to_idle(struct task_struct *p) 
#ifdef CONFIG_SCHED_WALT

static inline bool is_task_util_above_min_thresh(struct task_struct *p)

{

	unsigned int threshold = (sched_boost() == CONSERVATIVE_BOOST) ?

			sysctl_sched_min_task_util_for_boost :

			sysctl_sched_min_task_util_for_colocation;



	return task_util(p) > threshold;

	return task_util(p) > sched_task_filter_util;

}



static inline struct cpumask *find_rtg_target(struct task_struct *p)

kernel/sched/sched.h

+2 −3
Original line number Diff line number Diff line
@@ -2994,6 +2994,7 @@ static inline int same_freq_domain(int src_cpu, int dst_cpu) 
#define	CPU_RESERVED	1



extern enum sched_boost_policy boost_policy;

extern unsigned int sched_task_filter_util;

static inline enum sched_boost_policy sched_boost_policy(void)

{

	return boost_policy;
@@ -3122,9 +3123,7 @@ static inline enum sched_boost_policy task_boost_policy(struct task_struct *p) 
		 * Filter out tasks less than min task util threshold

		 * under conservative boost.

		 */

		if (sched_boost() == CONSERVATIVE_BOOST &&

				task_util(p) <=

				sysctl_sched_min_task_util_for_boost)

		if (task_util(p) <= sched_task_filter_util)

			policy = SCHED_BOOST_NONE;

	}