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Commit 5f30feb7 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "sched: use wake_q length only when WALT is enabled"

parents a543b4c8 7bd4f1b7

kernel/sched/core.c

+9 −1
Original line number Diff line number Diff line
@@ -2187,15 +2187,19 @@ static int select_fallback_rq(int cpu, struct task_struct *p, bool allow_iso) 
 */

static inline

int select_task_rq(struct task_struct *p, int cpu, int sd_flags, int wake_flags,

		  int sibling_count_hint)

		  __attribute__((unused))int sibling_count_hint)

{

	bool allow_isolated = (p->flags & PF_KTHREAD);



	lockdep_assert_held(&p->pi_lock);



	if (p->nr_cpus_allowed > 1)

#ifdef CONFIG_SCHED_WALT

		cpu = p->sched_class->select_task_rq(p, cpu, sd_flags, wake_flags,

						     sibling_count_hint);

#else

		cpu = p->sched_class->select_task_rq(p, cpu, sd_flags, wake_flags);

#endif

	else

		cpu = cpumask_any(p->cpus_ptr);
@@ -3624,7 +3628,11 @@ void sched_exec(void) 
		return;



	raw_spin_lock_irqsave(&p->pi_lock, flags);

#ifdef CONFIG_SCHED_WALT

	dest_cpu = p->sched_class->select_task_rq(p, task_cpu(p), SD_BALANCE_EXEC, 0, 1);

#else

	dest_cpu = p->sched_class->select_task_rq(p, task_cpu(p), SD_BALANCE_EXEC, 0);

#endif

	if (dest_cpu == smp_processor_id())

		goto unlock;

kernel/sched/deadline.c

+4 −0
Original line number Diff line number Diff line
@@ -1602,8 +1602,12 @@ static void yield_task_dl(struct rq *rq) 
static int find_later_rq(struct task_struct *task);



static int

#ifdef CONFIG_SCHED_WALT

select_task_rq_dl(struct task_struct *p, int cpu, int sd_flag, int flags,

		  int sibling_count_hint)

#else

select_task_rq_dl(struct task_struct *p, int cpu, int sd_flag, int flags)

#endif

{

	struct task_struct *curr;

	struct rq *rq;

kernel/sched/fair.c

+17 −0
Original line number Diff line number Diff line
@@ -7218,8 +7218,12 @@ int find_energy_efficient_cpu(struct task_struct *p, int prev_cpu, 
 * preempt must be disabled.

 */

static int

#ifdef CONFIG_SCHED_WALT

select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags,

		    int sibling_count_hint)

#else

select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_flags)

#endif

{

	struct sched_domain *tmp, *sd = NULL;

	int cpu = smp_processor_id();
@@ -7229,8 +7233,12 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f 


	if (sched_energy_enabled()) {

		rcu_read_lock();

#ifdef CONFIG_SCHED_WALT

		new_cpu = find_energy_efficient_cpu(p, prev_cpu, sync,

						    sibling_count_hint);

#else

		new_cpu = find_energy_efficient_cpu(p, prev_cpu, sync, 1);

#endif

		if (unlikely(new_cpu < 0))

			new_cpu = prev_cpu;

		rcu_read_unlock();
@@ -7241,15 +7249,24 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f 
		record_wakee(p);



		if (sched_energy_enabled()) {

#ifdef CONFIG_SCHED_WALT

			new_cpu = find_energy_efficient_cpu(p, prev_cpu, sync,

							    sibling_count_hint);

#else

			new_cpu = find_energy_efficient_cpu(p, prev_cpu, sync, 1);

#endif

			if (new_cpu >= 0)

				return new_cpu;

			new_cpu = prev_cpu;

		}



#ifdef CONFIG_SCHED_WALT

		want_affine = !wake_wide(p, sibling_count_hint) &&

			      cpumask_test_cpu(cpu, p->cpus_ptr);

#else

		want_affine = !wake_wide(p, 1) &&

			      cpumask_test_cpu(cpu, p->cpus_ptr);

#endif

	}



	rcu_read_lock();

kernel/sched/idle.c

+4 −0
Original line number Diff line number Diff line
@@ -364,8 +364,12 @@ void cpu_startup_entry(enum cpuhp_state state) 


#ifdef CONFIG_SMP

static int

#ifdef CONFIG_SCHED_WALT

select_task_rq_idle(struct task_struct *p, int cpu, int sd_flag, int flags,

		    int sibling_count_hint)

#else

select_task_rq_idle(struct task_struct *p, int cpu, int sd_flag, int flags)

#endif

{

	return task_cpu(p); /* IDLE tasks as never migrated */

}

kernel/sched/rt.c

+4 −0
Original line number Diff line number Diff line
@@ -1521,8 +1521,12 @@ task_may_not_preempt(struct task_struct *task, int cpu) 
}



static int

#ifdef CONFIG_SCHED_WALT

select_task_rq_rt(struct task_struct *p, int cpu, int sd_flag, int flags,

		 int sibling_count_hint)

#else

select_task_rq_rt(struct task_struct *p, int cpu, int sd_flag, int flags)

#endif

{

	struct task_struct *curr;

	struct rq *rq;