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Commit a553d2e5 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "sched: Add load based placement for RT tasks"

parents 4d58cfa9 1f6fff35

kernel/sched/fair.c

+6 −3
Original line number Diff line number Diff line
@@ -9251,7 +9251,7 @@ no_move: 
				stop_one_cpu_nowait(cpu_of(busiest),

					active_load_balance_cpu_stop, busiest,

					&busiest->active_balance_work);

				ld_moved++;

				*continue_balancing = 0;

			}



			/*
@@ -9462,9 +9462,12 @@ static int idle_balance(struct rq *this_rq) 


		/*

		 * Stop searching for tasks to pull if there are

		 * now runnable tasks on the balance rq.

		 * now runnable tasks on the balance rq or if

		 * continue_balancing has been unset (only possible

		 * due to active migration).

		 */

		if (pulled_task || balance_rq->nr_running > 0)

		if (pulled_task || balance_rq->nr_running > 0 ||

						!continue_balancing)

			break;

	}

	rcu_read_unlock();

kernel/sched/rt.c

+17 −1
Original line number Diff line number Diff line
@@ -1631,6 +1631,7 @@ static int find_lowest_rq_hmp(struct task_struct *task) 
{

	struct cpumask *lowest_mask = __get_cpu_var(local_cpu_mask);

	int cpu_cost, min_cost = INT_MAX;

	u64 cpu_load, min_load = ULLONG_MAX;

	int best_cpu = -1;

	int i;
@@ -1664,11 +1665,26 @@ static int find_lowest_rq_hmp(struct task_struct *task) 
		if (sched_boost() && capacity(rq) != max_capacity)

			continue;



		if (cpu_cost < min_cost && !sched_cpu_high_irqload(i)) {

		if (power_delta_exceeded(cpu_cost, min_cost)) {

			if (cpu_cost > min_cost)

				continue;



			min_cost = cpu_cost;

			min_load = ULLONG_MAX;

			best_cpu = -1;

		}



		if (sched_cpu_high_irqload(i))

			continue;



		cpu_load = scale_load_to_cpu(

				rq->hmp_stats.cumulative_runnable_avg, i);

		if (cpu_load < min_load) {

			min_load = cpu_load;

			best_cpu = i;

		}

	}



	return best_cpu;

}

kernel/sched/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -1117,6 +1117,7 @@ extern void check_for_migration(struct rq *rq, struct task_struct *p); 
extern void pre_big_small_task_count_change(const struct cpumask *cpus);

extern void post_big_small_task_count_change(const struct cpumask *cpus);

extern void set_hmp_defaults(void);

extern int power_delta_exceeded(unsigned int cpu_cost, unsigned int base_cost);

extern unsigned int power_cost_at_freq(int cpu, unsigned int freq);

extern void reset_all_window_stats(u64 window_start, unsigned int window_size);

extern void boost_kick(int cpu);