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Commit dd8171dd authored by Pavankumar Kondeti's avatar Pavankumar Kondeti Committed by Sai Harshini Nimmala
Browse files

sched/walt: Improve the scheduler 



This change is for general scheduler improvement.

Change-Id: I1aa4c378452c936a443a17e77834d1191b7b0563
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: default avatarSai Harshini Nimmala <snimmala@codeaurora.org>
parent a0c2b0d2

kernel/sched/walt.c

+31 −5
Original line number Diff line number Diff line
@@ -123,6 +123,7 @@ __read_mostly unsigned int sysctl_sched_window_stats_policy = 


/* Window size (in ns) */

__read_mostly unsigned int sched_ravg_window = MIN_SCHED_RAVG_WINDOW;

__read_mostly unsigned int new_sched_ravg_window = MIN_SCHED_RAVG_WINDOW;



/*

 * A after-boot constant divisor for cpu_util_freq_walt() to apply the load
@@ -3219,6 +3220,13 @@ u64 get_rtgb_active_time(void) 
	return 0;

}



static void walt_init_window_dep(void);

static void walt_tunables_fixup(void)

{

	walt_update_group_thresholds();

	walt_init_window_dep();

}



/*

 * Runs in hard-irq context. This should ideally run just after the latest

 * window roll-over.
@@ -3324,6 +3332,20 @@ void walt_irq_work(struct irq_work *irq_work) 
		}

	}



	/*

	 * If the window change request is in pending, good place to

	 * change sched_ravg_window since all rq locks are acquired.

	 */

	if (!is_migration) {

		if (sched_ravg_window != new_sched_ravg_window) {

			printk_deferred("ALERT: changing window size from %u to %u\n",

					sched_ravg_window,

					new_sched_ravg_window);

			sched_ravg_window = new_sched_ravg_window;

			walt_tunables_fixup();

		}

	}



	for_each_cpu(cpu, cpu_possible_mask)

		raw_spin_unlock(&cpu_rq(cpu)->lock);
@@ -3436,12 +3458,8 @@ int walt_proc_group_thresholds_handler(struct ctl_table *table, int write, 
	return ret;

}



static void walt_init_once(void)

static void walt_init_window_dep(void)

{

	init_irq_work(&walt_migration_irq_work, walt_irq_work);

	init_irq_work(&walt_cpufreq_irq_work, walt_irq_work);

	walt_rotate_work_init();



	walt_cpu_util_freq_divisor =

	    (sched_ravg_window >> SCHED_CAPACITY_SHIFT) * 100;

	walt_scale_demand_divisor = sched_ravg_window >> SCHED_CAPACITY_SHIFT;
@@ -3453,6 +3471,14 @@ static void walt_init_once(void) 
		scale_demand(sched_init_task_load_windows);

}



static void walt_init_once(void)

{

	init_irq_work(&walt_migration_irq_work, walt_irq_work);

	init_irq_work(&walt_cpufreq_irq_work, walt_irq_work);

	walt_rotate_work_init();

	walt_init_window_dep();

}



void walt_sched_init_rq(struct rq *rq)

{

	int j;