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sched: remove precise CPU load calculations #2

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continued removal of precise CPU load calculations.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2007-10-15 17:00:03 +02:00
parent a25707f3ae
commit 53df556e06
1 changed files with 1 additions and 31 deletions
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32
kernel/sched.c
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@ -173,8 +173,6 @@ struct rt_prio_array {
struct load_stat {
struct load_weight load;
u64 load_update_start, load_update_last;
unsigned long delta_fair, delta_exec, delta_stat;
};
/* CFS-related fields in a runqueue */
@ -793,15 +791,6 @@ static int balance_tasks(struct rq *this_rq, int this_cpu, struct rq *busiest,
#define sched_class_highest (&rt_sched_class)
static void __update_curr_load(struct rq *rq, struct load_stat *ls)
{
if (rq->curr != rq->idle && ls->load.weight) {
ls->delta_exec += ls->delta_stat;
ls->delta_fair += calc_delta_fair(ls->delta_stat, &ls->load);
ls->delta_stat = 0;
}
}
/*
* Update delta_exec, delta_fair fields for rq.
*
@ -817,31 +806,13 @@ static void __update_curr_load(struct rq *rq, struct load_stat *ls)
* This function is called /before/ updating rq->ls.load
* and when switching tasks.
*/
static void update_curr_load(struct rq *rq)
{
struct load_stat *ls = &rq->ls;
u64 start;
start = ls->load_update_start;
ls->load_update_start = rq->clock;
ls->delta_stat += rq->clock - start;
/*
* Stagger updates to ls->delta_fair. Very frequent updates
* can be expensive.
*/
if (ls->delta_stat)
__update_curr_load(rq, ls);
}
static inline void inc_load(struct rq *rq, const struct task_struct *p)
{
update_curr_load(rq);
update_load_add(&rq->ls.load, p->se.load.weight);
}
static inline void dec_load(struct rq *rq, const struct task_struct *p)
{
update_curr_load(rq);
update_load_sub(&rq->ls.load, p->se.load.weight);
}
@ -1972,8 +1943,7 @@ unsigned long nr_active(void)
*/
static void update_cpu_load(struct rq *this_rq)
{
unsigned long total_load = this_rq->ls.load.weight;
unsigned long this_load = total_load;
unsigned long this_load = this_rq->ls.load.weight;
int i, scale;
this_rq->nr_load_updates++;