Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=63489e45e265f64c368882be1f01c42dec5d984c
Commit: 63489e45e265f64c368882be1f01c42dec5d984c
Parent: 82a1fcb90287052aabfa235e7ffc693ea003fe69
Author: Steven Rostedt <[EMAIL PROTECTED]>
AuthorDate: Fri Jan 25 21:08:03 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Fri Jan 25 21:08:03 2008 +0100
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 <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
kernel/sched.c | 1 +
kernel/sched_rt.c | 17 +++++++++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 5b3d465..9dd8d12 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -342,6 +342,7 @@ struct rt_rq {
struct rt_prio_array active;
int rt_load_balance_idx;
struct list_head *rt_load_balance_head, *rt_load_balance_curr;
+ unsigned long rt_nr_running;
};
/*
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index cefcd51..e3d2ca8 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);
}
/*
-
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