diff options
author | 2008-01-25 21:08:03 +0100 | |
---|---|---|
committer | 2008-01-25 21:08:03 +0100 | |
commit | 63489e45e265f64c368882be1f01c42dec5d984c (patch) | |
tree | d228ccbe22bc421c36455c7e05480247a4a8d2b1 /kernel/sched_rt.c | |
parent | softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks (diff) | |
download | linux-63489e45e265f64c368882be1f01c42dec5d984c.tar.gz linux-63489e45e265f64c368882be1f01c42dec5d984c.tar.bz2 linux-63489e45e265f64c368882be1f01c42dec5d984c.zip |
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: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_rt.c')
-rw-r--r-- | kernel/sched_rt.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index cefcd5105146..e3d2ca8832af 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -26,6 +26,19 @@ static void update_curr_rt(struct rq *rq) 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) { 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); __set_bit(p->prio, array->bitmap); 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)) __clear_bit(p->prio, array->bitmap); dec_cpu_load(rq, p->se.load.weight); + + dec_rt_tasks(p, rq); } /* |