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Commit 63489e45 authored by Steven Rostedt's avatar Steven Rostedt Committed by Ingo Molnar
Browse files

sched: count # of queued RT tasks 



This patch adds accounting to keep track of the number of RT tasks running
on a runqueue. This information will be used in later patches.

Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 82a1fcb9

kernel/sched.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -342,6 +342,7 @@ struct rt_rq { 
	struct rt_prio_array active;

	struct rt_prio_array active;

	int rt_load_balance_idx;

	int rt_load_balance_idx;

	struct list_head *rt_load_balance_head, *rt_load_balance_curr;

	struct list_head *rt_load_balance_head, *rt_load_balance_curr;

	unsigned long rt_nr_running;

};

};





/*

/*

kernel/sched_rt.c

+17 −0
Original line number Original line Diff line number Diff line
@@ -26,6 +26,19 @@ static void update_curr_rt(struct rq *rq) 
	cpuacct_charge(curr, delta_exec);

	cpuacct_charge(curr, delta_exec);

}

}





static inline void inc_rt_tasks(struct task_struct *p, struct rq *rq)

{

	WARN_ON(!rt_task(p));

	rq->rt.rt_nr_running++;

}



static inline void dec_rt_tasks(struct task_struct *p, struct rq *rq)

{

	WARN_ON(!rt_task(p));

	WARN_ON(!rq->rt.rt_nr_running);

	rq->rt.rt_nr_running--;

}



static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)

static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)

{

{

	struct rt_prio_array *array = &rq->rt.active;

	struct rt_prio_array *array = &rq->rt.active;
@@ -33,6 +46,8 @@ static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup) 
	list_add_tail(&p->run_list, array->queue + p->prio);

	list_add_tail(&p->run_list, array->queue + p->prio);

	__set_bit(p->prio, array->bitmap);

	__set_bit(p->prio, array->bitmap);

	inc_cpu_load(rq, p->se.load.weight);

	inc_cpu_load(rq, p->se.load.weight);



	inc_rt_tasks(p, rq);

}

}





/*

/*
@@ -48,6 +63,8 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep) 
	if (list_empty(array->queue + p->prio))

	if (list_empty(array->queue + p->prio))

		__clear_bit(p->prio, array->bitmap);

		__clear_bit(p->prio, array->bitmap);

	dec_cpu_load(rq, p->se.load.weight);

	dec_cpu_load(rq, p->se.load.weight);



	dec_rt_tasks(p, rq);

}

}





/*

/*