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Commit a9957449 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Ingo Molnar
Browse files

sched: uninline scheduler 



* save ~300 bytes
* activate_idle_task() was moved to avoid a warning

bloat-o-meter output:

add/remove: 6/0 grow/shrink: 0/16 up/down: 438/-733 (-295)		<===
function                                     old     new   delta
__enqueue_entity                               -     165    +165
finish_task_switch                             -     110    +110
update_curr_rt                                 -      79     +79
__load_balance_iterator                        -      32     +32
__task_rq_unlock                               -      28     +28
find_process_by_pid                            -      24     +24
do_sched_setscheduler                        133     123     -10
sys_sched_rr_get_interval                    176     165     -11
sys_sched_getparam                           156     145     -11
normalize_rt_tasks                           482     470     -12
sched_getaffinity                            112      99     -13
sys_sched_getscheduler                        86      72     -14
sched_setaffinity                            226     212     -14
sched_setscheduler                           666     642     -24
load_balance_start_fair                       33       9     -24
load_balance_next_fair                        33       9     -24
dequeue_task_rt                              133      67     -66
put_prev_task_rt                              97      28     -69
schedule_tail                                133      50     -83
schedule                                     682     594     -88
enqueue_entity                               499     366    -133
task_new_fair                                317     180    -137

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 155bb293

kernel/sched.c

+22 −22
Original line number Diff line number Diff line
@@ -608,7 +608,7 @@ repeat_lock_task: 
	return rq;

}



static inline void __task_rq_unlock(struct rq *rq)

static void __task_rq_unlock(struct rq *rq)

	__releases(rq->lock)

{

	spin_unlock(&rq->lock);
@@ -623,7 +623,7 @@ static inline void task_rq_unlock(struct rq *rq, unsigned long *flags) 
/*

 * this_rq_lock - lock this runqueue and disable interrupts.

 */

static inline struct rq *this_rq_lock(void)

static struct rq *this_rq_lock(void)

	__acquires(rq->lock)

{

	struct rq *rq;
@@ -985,20 +985,6 @@ static void activate_task(struct rq *rq, struct task_struct *p, int wakeup) 
	inc_nr_running(p, rq);

}



/*

 * activate_idle_task - move idle task to the _front_ of runqueue.

 */

static inline void activate_idle_task(struct task_struct *p, struct rq *rq)

{

	update_rq_clock(rq);



	if (p->state == TASK_UNINTERRUPTIBLE)

		rq->nr_uninterruptible--;



	enqueue_task(rq, p, 0);

	inc_nr_running(p, rq);

}



/*

 * deactivate_task - remove a task from the runqueue.

 */
@@ -1206,7 +1192,7 @@ void kick_process(struct task_struct *p) 
 * We want to under-estimate the load of migration sources, to

 * balance conservatively.

 */

static inline unsigned long source_load(int cpu, int type)

static unsigned long source_load(int cpu, int type)

{

	struct rq *rq = cpu_rq(cpu);

	unsigned long total = weighted_cpuload(cpu);
@@ -1221,7 +1207,7 @@ static inline unsigned long source_load(int cpu, int type) 
 * Return a high guess at the load of a migration-target cpu weighted

 * according to the scheduling class and "nice" value.

 */

static inline unsigned long target_load(int cpu, int type)

static unsigned long target_load(int cpu, int type)

{

	struct rq *rq = cpu_rq(cpu);

	unsigned long total = weighted_cpuload(cpu);
@@ -1813,7 +1799,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev, 
 * with the lock held can cause deadlocks; see schedule() for

 * details.)

 */

static inline void finish_task_switch(struct rq *rq, struct task_struct *prev)

static void finish_task_switch(struct rq *rq, struct task_struct *prev)

	__releases(rq->lock)

{

	struct mm_struct *mm = rq->prev_mm;
@@ -3020,7 +3006,7 @@ static DEFINE_SPINLOCK(balancing); 
 *

 * Balancing parameters are set up in arch_init_sched_domains.

 */

static inline void rebalance_domains(int cpu, enum cpu_idle_type idle)

static void rebalance_domains(int cpu, enum cpu_idle_type idle)

{

	int balance = 1;

	struct rq *rq = cpu_rq(cpu);
@@ -4140,7 +4126,7 @@ struct task_struct *idle_task(int cpu) 
 * find_process_by_pid - find a process with a matching PID value.

 * @pid: the pid in question.

 */

static inline struct task_struct *find_process_by_pid(pid_t pid)

static struct task_struct *find_process_by_pid(pid_t pid)

{

	return pid ? find_task_by_pid(pid) : current;

}
@@ -5156,6 +5142,20 @@ static void migrate_live_tasks(int src_cpu) 
	write_unlock_irq(&tasklist_lock);

}



/*

 * activate_idle_task - move idle task to the _front_ of runqueue.

 */

static void activate_idle_task(struct task_struct *p, struct rq *rq)

{

	update_rq_clock(rq);



	if (p->state == TASK_UNINTERRUPTIBLE)

		rq->nr_uninterruptible--;



	enqueue_task(rq, p, 0);

	inc_nr_running(p, rq);

}



/*

 * Schedules idle task to be the next runnable task on current CPU.

 * It does so by boosting its priority to highest possible and adding it to
@@ -6494,7 +6494,7 @@ int in_sched_functions(unsigned long addr) 
		&& addr < (unsigned long)__sched_text_end);

}



static inline void init_cfs_rq(struct cfs_rq *cfs_rq, struct rq *rq)

static void init_cfs_rq(struct cfs_rq *cfs_rq, struct rq *rq)

{

	cfs_rq->tasks_timeline = RB_ROOT;

#ifdef CONFIG_FAIR_GROUP_SCHED

kernel/sched_fair.c

+1 −1
Original line number Diff line number Diff line
@@ -892,7 +892,7 @@ static void put_prev_task_fair(struct rq *rq, struct task_struct *prev) 
 * achieve that by always pre-iterating before returning

 * the current task:

 */

static inline struct task_struct *

static struct task_struct *

__load_balance_iterator(struct cfs_rq *cfs_rq, struct rb_node *curr)

{

	struct task_struct *p;

kernel/sched_rt.c

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ 
 * Update the current task's runtime statistics. Skip current tasks that

 * are not in our scheduling class.

 */

static inline void update_curr_rt(struct rq *rq)

static void update_curr_rt(struct rq *rq)

{

	struct task_struct *curr = rq->curr;

	u64 delta_exec;