Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

sched: count # of queued RT tasks

Browse source 
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: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-01-25 21:08:03 +01:00 committed by Ingo Molnar
parent 82a1fcb902
commit 63489e45e2
2 changed files with 18 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
kernel/sched.c
View file

@ -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;
}; };
/* /*

17
kernel/sched_rt.c
View file

@ -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);
} }
/* /*