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sched: eliminate rq_clock() use

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eliminate rq_clock() use by changing it to:

   update_rq_clock(rq)
   now = rq->clock;

identity transformation - no change in behavior.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-08-09 11:16:47 +02:00
parent b04a0f4c16
commit a8e504d2a5
2 changed files with 40 additions and 17 deletions
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49
kernel/sched.c
View file

@ -927,7 +927,10 @@ static int effective_prio(struct task_struct *p)
*/
static void activate_task(struct rq *rq, struct task_struct *p, int wakeup)
{
u64 now = rq_clock(rq);
u64 now;
update_rq_clock(rq);
now = rq->clock;
if (p->state == TASK_UNINTERRUPTIBLE)
rq->nr_uninterruptible--;
@ -941,7 +944,10 @@ static void activate_task(struct rq *rq, struct task_struct *p, int wakeup)
*/
static inline void activate_idle_task(struct task_struct *p, struct rq *rq)
{
u64 now = rq_clock(rq);
u64 now;
update_rq_clock(rq);
now = rq->clock;
if (p->state == TASK_UNINTERRUPTIBLE)
rq->nr_uninterruptible--;
@ -1664,7 +1670,8 @@ void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
rq = task_rq_lock(p, &flags);
BUG_ON(p->state != TASK_RUNNING);
this_cpu = smp_processor_id(); /* parent's CPU */
now = rq_clock(rq);
update_rq_clock(rq);
now = rq->clock;
p->prio = effective_prio(p);
@ -2134,7 +2141,8 @@ void sched_exec(void)
static void pull_task(struct rq *src_rq, struct task_struct *p,
struct rq *this_rq, int this_cpu)
{
deactivate_task(src_rq, p, 0, rq_clock(src_rq));
update_rq_clock(src_rq);
deactivate_task(src_rq, p, 0, src_rq->clock);
set_task_cpu(p, this_cpu);
activate_task(this_rq, p, 0);
/*
@ -3221,7 +3229,8 @@ unsigned long long task_sched_runtime(struct task_struct *p)
rq = task_rq_lock(p, &flags);
ns = p->se.sum_exec_runtime;
if (rq->curr == p) {
delta_exec = rq_clock(rq) - p->se.exec_start;
update_rq_clock(rq);
delta_exec = rq->clock - p->se.exec_start;
if ((s64)delta_exec > 0)
ns += delta_exec;
}
@ -3919,7 +3928,8 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
BUG_ON(prio < 0 || prio > MAX_PRIO);
rq = task_rq_lock(p, &flags);
now = rq_clock(rq);
update_rq_clock(rq);
now = rq->clock;
oldprio = p->prio;
on_rq = p->se.on_rq;
@ -3966,7 +3976,8 @@ void set_user_nice(struct task_struct *p, long nice)
* the task might be in the middle of scheduling on another CPU.
*/
rq = task_rq_lock(p, &flags);
now = rq_clock(rq);
update_rq_clock(rq);
now = rq->clock;
/*
* The RT priorities are set via sched_setscheduler(), but we still
* allow the 'normal' nice value to be set - but as expected
@ -4228,8 +4239,10 @@ int sched_setscheduler(struct task_struct *p, int policy,
goto recheck;
}
on_rq = p->se.on_rq;
if (on_rq)
deactivate_task(rq, p, 0, rq_clock(rq));
if (on_rq) {
update_rq_clock(rq);
deactivate_task(rq, p, 0, rq->clock);
}
oldprio = p->prio;
__setscheduler(rq, p, policy, param->sched_priority);
if (on_rq) {
@ -4981,8 +4994,10 @@ static int __migrate_task(struct task_struct *p, int src_cpu, int dest_cpu)
goto out;
on_rq = p->se.on_rq;
if (on_rq)
deactivate_task(rq_src, p, 0, rq_clock(rq_src));
if (on_rq) {
update_rq_clock(rq_src);
deactivate_task(rq_src, p, 0, rq_src->clock);
}
set_task_cpu(p, dest_cpu);
if (on_rq) {
activate_task(rq_dest, p, 0);
@ -5215,7 +5230,8 @@ static void migrate_dead_tasks(unsigned int dead_cpu)
for ( ; ; ) {
if (!rq->nr_running)
break;
next = pick_next_task(rq, rq->curr, rq_clock(rq));
update_rq_clock(rq);
next = pick_next_task(rq, rq->curr, rq->clock);
if (!next)
break;
migrate_dead(dead_cpu, next);
@ -5400,7 +5416,8 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
rq->migration_thread = NULL;
/* Idle task back to normal (off runqueue, low prio) */
rq = task_rq_lock(rq->idle, &flags);
deactivate_task(rq, rq->idle, 0, rq_clock(rq));
update_rq_clock(rq);
deactivate_task(rq, rq->idle, 0, rq->clock);
rq->idle->static_prio = MAX_PRIO;
__setscheduler(rq, rq->idle, SCHED_NORMAL, 0);
rq->idle->sched_class = &idle_sched_class;
@ -6638,8 +6655,10 @@ void normalize_rt_tasks(void)
#endif
on_rq = p->se.on_rq;
if (on_rq)
deactivate_task(task_rq(p), p, 0, rq_clock(task_rq(p)));
if (on_rq) {
update_rq_clock(task_rq(p));
deactivate_task(task_rq(p), p, 0, task_rq(p)->clock);
}
__setscheduler(rq, p, SCHED_NORMAL, 0);
if (on_rq) {
activate_task(task_rq(p), p, 0);

8
kernel/sched_fair.c
View file

@ -844,7 +844,8 @@ static void check_preempt_curr_fair(struct rq *rq, struct task_struct *p)
unsigned long gran;
if (unlikely(rt_prio(p->prio))) {
update_curr(cfs_rq, rq_clock(rq));
update_rq_clock(rq);
update_curr(cfs_rq, rq->clock);
resched_task(curr);
return;
}
@ -1063,9 +1064,12 @@ static void set_curr_task_fair(struct rq *rq)
{
struct task_struct *curr = rq->curr;
struct sched_entity *se = &curr->se;
u64 now = rq_clock(rq);
u64 now;
struct cfs_rq *cfs_rq;
update_rq_clock(rq);
now = rq->clock;
for_each_sched_entity(se) {
cfs_rq = cfs_rq_of(se);
set_next_entity(cfs_rq, se, now);