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Commit e193cefc authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I310bbdc19bb65a0c562ec6a208f2da713eba954d
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent 2e2260c3

include/linux/sched/sysctl.h

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ extern unsigned int sysctl_sched_capacity_margin_up[MAX_MARGIN_LEVELS]; 
extern unsigned int sysctl_sched_capacity_margin_down[MAX_MARGIN_LEVELS];

#ifdef CONFIG_SCHED_WALT

extern unsigned int sysctl_sched_user_hint;

extern const int sched_user_hint_max;

extern unsigned int sysctl_sched_cpu_high_irqload;

extern unsigned int sysctl_sched_boost;

extern unsigned int sysctl_sched_group_upmigrate_pct;

kernel/sched/core.c

+2 −2
Original line number Diff line number Diff line
@@ -2008,7 +2008,7 @@ static inline void walt_try_to_wake_up(struct task_struct *p) 


	rcu_read_lock();

	grp = task_related_thread_group(p);

	if (update_preferred_cluster(grp, p, old_load))

	if (update_preferred_cluster(grp, p, old_load, false))

		set_preferred_cluster(grp);

	rcu_read_unlock();

}
@@ -3203,7 +3203,7 @@ void scheduler_tick(void) 


	rcu_read_lock();

	grp = task_related_thread_group(curr);

	if (update_preferred_cluster(grp, curr, old_load))

	if (update_preferred_cluster(grp, curr, old_load, true))

		set_preferred_cluster(grp);

	rcu_read_unlock();

kernel/sched/fair.c

+2 −1
Original line number Diff line number Diff line
@@ -3912,7 +3912,8 @@ static inline bool task_fits_max(struct task_struct *p, int cpu) 
	if (is_min_capacity_cpu(cpu)) {

		if (task_boost_policy(p) == SCHED_BOOST_ON_BIG ||

			task_boost > 0 ||

			schedtune_task_boost(p) > 0)

			schedtune_task_boost(p) > 0 ||

			walt_should_kick_upmigrate(p, cpu))

			return false;

	} else { /* mid cap cpu */

		if (task_boost > 1)

kernel/sched/sched.h

+2 −2
Original line number Diff line number Diff line
@@ -2680,7 +2680,7 @@ extern unsigned int __read_mostly sched_load_granule; 


extern int register_cpu_cycle_counter_cb(struct cpu_cycle_counter_cb *cb);

extern int update_preferred_cluster(struct related_thread_group *grp,

			struct task_struct *p, u32 old_load);

			struct task_struct *p, u32 old_load, bool from_tick);

extern void set_preferred_cluster(struct related_thread_group *grp);

extern void add_new_task_to_grp(struct task_struct *new);
@@ -2995,7 +2995,7 @@ static inline u32 task_load(struct task_struct *p) { return 0; } 
static inline u32 task_pl(struct task_struct *p) { return 0; }



static inline int update_preferred_cluster(struct related_thread_group *grp,

			 struct task_struct *p, u32 old_load)

			 struct task_struct *p, u32 old_load, bool from_tick)

{

	return 0;

}

kernel/sched/walt.c

+14 −6
Original line number Diff line number Diff line
@@ -522,8 +522,13 @@ static inline u64 freq_policy_load(struct rq *rq) 
		break;

	}



	if (should_apply_suh_freq_boost(cluster))

		load = div64_u64(load * sysctl_sched_user_hint, (u64)100);

	if (should_apply_suh_freq_boost(cluster)) {

		if (is_suh_max())

			load = sched_ravg_window;

		else

			load = div64_u64(load * sysctl_sched_user_hint,

					 (u64)100);

	}



done:

	trace_sched_load_to_gov(rq, aggr_grp_load, tt_load, sched_freq_aggr_en,
@@ -2623,6 +2628,9 @@ void update_best_cluster(struct related_thread_group *grp, 
		return;

	}



	if (is_suh_max())

		demand = sched_group_upmigrate;



	if (!grp->skip_min) {

		if (demand >= sched_group_upmigrate) {

			grp->skip_min = true;
@@ -2719,13 +2727,16 @@ void set_preferred_cluster(struct related_thread_group *grp) 
}



int update_preferred_cluster(struct related_thread_group *grp,

		struct task_struct *p, u32 old_load)

		struct task_struct *p, u32 old_load, bool from_tick)

{

	u32 new_load = task_load(p);



	if (!grp)

		return 0;



	if (unlikely(from_tick && is_suh_max()))

		return 1;



	/*

	 * Update if task's load has changed significantly or a complete window

	 * has passed since we last updated preference
@@ -2740,8 +2751,6 @@ int update_preferred_cluster(struct related_thread_group *grp, 
#define ADD_TASK	0

#define REM_TASK	1



#define DEFAULT_CGROUP_COLOC_ID 1



static inline struct related_thread_group*

lookup_related_thread_group(unsigned int group_id)

{
@@ -2995,7 +3004,6 @@ static bool is_cluster_hosting_top_app(struct sched_cluster *cluster) 
	return (is_min_capacity_cluster(cluster) == grp_on_min);

}





static unsigned long max_cap[NR_CPUS];

static unsigned long thermal_cap_cpu[NR_CPUS];