Release 4.11 kernel/sched/stats.h

#ifdef CONFIG_SCHEDSTATS

/*
 * Expects runqueue lock to be held for atomicity of update
 */

static inline void

rq_sched_info_arrive(struct rq *rq, unsigned long long delta)
{
	if (rq) {
		rq->rq_sched_info.run_delay += delta;
		rq->rq_sched_info.pcount++;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
38
100.00%
2
100.00%
Total
38
100.00%
2
100.00%

/*
 * Expects runqueue lock to be held for atomicity of update
 */

static inline void

rq_sched_info_depart(struct rq *rq, unsigned long long delta)
{
	if (rq)
		rq->rq_cpu_time += delta;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
26
96.30%
1
50.00%
Ken Chen
1
3.70%
1
50.00%
Total
27
100.00%
2
100.00%


static inline void

rq_sched_info_dequeued(struct rq *rq, unsigned long long delta)
{
	if (rq)
		rq->rq_sched_info.run_delay += delta;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ankita Garg
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%


#define schedstat_enabled()		static_branch_unlikely(&sched_schedstats)

#define schedstat_inc(var)		do { if (schedstat_enabled()) { var++; } } while (0)

#define schedstat_add(var, amt)		do { if (schedstat_enabled()) { var += (amt); } } while (0)

#define schedstat_set(var, val)		do { if (schedstat_enabled()) { var = (val); } } while (0)

#define schedstat_val(var)		(var)

#define schedstat_val_or_zero(var)	((schedstat_enabled()) ? (var) : 0)

#else /* !CONFIG_SCHEDSTATS */

static inline void

rq_sched_info_arrive(struct rq *rq, unsigned long long delta)
{}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
16
100.00%
1
100.00%
Total
16
100.00%
1
100.00%


static inline void

rq_sched_info_dequeued(struct rq *rq, unsigned long long delta)
{}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ankita Garg
13
81.25%
1
50.00%
Ingo Molnar
3
18.75%
1
50.00%
Total
16
100.00%
2
100.00%


static inline void

rq_sched_info_depart(struct rq *rq, unsigned long long delta)
{}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
13
81.25%
1
50.00%
Ankita Garg
3
18.75%
1
50.00%
Total
16
100.00%
2
100.00%


#define schedstat_enabled()		0

#define schedstat_inc(var)		do { } while (0)

#define schedstat_add(var, amt)		do { } while (0)

#define schedstat_set(var, val)		do { } while (0)

#define schedstat_val(var)		0

#define schedstat_val_or_zero(var)	0
#endif /* CONFIG_SCHEDSTATS */

#ifdef CONFIG_SCHED_INFO


static inline void sched_info_reset_dequeued(struct task_struct *t)
{
	t->sched_info.last_queued = 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ankita Garg
20
100.00%
1
100.00%
Total
20
100.00%
1
100.00%

/*
 * We are interested in knowing how long it was from the *first* time a
 * task was queued to the time that it finally hit a cpu, we call this routine
 * from dequeue_task() to account for possible rq->clock skew across cpus. The
 * delta taken on each cpu would annul the skew.
 */


static inline void sched_info_dequeued(struct rq *rq, struct task_struct *t)
{
	unsigned long long now = rq_clock(rq), delta = 0;

	if (unlikely(sched_info_on()))
		if (t->sched_info.last_queued)
			delta = now - t->sched_info.last_queued;
	sched_info_reset_dequeued(t);
	t->sched_info.run_delay += delta;

	rq_sched_info_dequeued(rq, delta);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ankita Garg
48
62.34%
1
25.00%
Ingo Molnar
19
24.68%
1
25.00%
Michael S. Tsirkin
7
9.09%
1
25.00%
Frédéric Weisbecker
3
3.90%
1
25.00%
Total
77
100.00%
4
100.00%

/*
 * Called when a task finally hits the cpu.  We can now calculate how
 * long it was waiting to run.  We also note when it began so that we
 * can keep stats on how long its timeslice is.
 */


static void sched_info_arrive(struct rq *rq, struct task_struct *t)
{
	unsigned long long now = rq_clock(rq), delta = 0;

	if (t->sched_info.last_queued)
		delta = now - t->sched_info.last_queued;
	sched_info_reset_dequeued(t);
	t->sched_info.run_delay += delta;
	t->sched_info.last_arrival = now;
	t->sched_info.pcount++;

	rq_sched_info_arrive(rq, delta);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
72
86.75%
2
40.00%
Michael S. Tsirkin
7
8.43%
1
20.00%
Frédéric Weisbecker
3
3.61%
1
20.00%
Ankita Garg
1
1.20%
1
20.00%
Total
83
100.00%
5
100.00%

/*
 * This function is only called from enqueue_task(), but also only updates
 * the timestamp if it is already not set.  It's assumed that
 * sched_info_dequeued() will clear that stamp when appropriate.
 */


static inline void sched_info_queued(struct rq *rq, struct task_struct *t)
{
	if (unlikely(sched_info_on()))
		if (!t->sched_info.last_queued)
			t->sched_info.last_queued = rq_clock(rq);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
36
80.00%
1
33.33%
Michael S. Tsirkin
6
13.33%
1
33.33%
Frédéric Weisbecker
3
6.67%
1
33.33%
Total
45
100.00%
3
100.00%

/*
 * Called when a process ceases being the active-running process involuntarily
 * due, typically, to expiring its time slice (this may also be called when
 * switching to the idle task).  Now we can calculate how long we ran.
 * Also, if the process is still in the TASK_RUNNING state, call
 * sched_info_queued() to mark that it has now again started waiting on
 * the runqueue.
 */


static inline void sched_info_depart(struct rq *rq, struct task_struct *t)
{
	unsigned long long delta = rq_clock(rq) -
					t->sched_info.last_arrival;

	rq_sched_info_depart(rq, delta);

	if (t->state == TASK_RUNNING)
		sched_info_queued(rq, t);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
30
54.55%
1
25.00%
Bharath Ravi
13
23.64%
1
25.00%
Michael S. Tsirkin
9
16.36%
1
25.00%
Frédéric Weisbecker
3
5.45%
1
25.00%
Total
55
100.00%
4
100.00%

/*
 * Called when tasks are switched involuntarily due, typically, to expiring
 * their time slice.  (This may also be called when switching to or from
 * the idle task.)  We are only called when prev != next.
 */

static inline void

__sched_info_switch(struct rq *rq,
		    struct task_struct *prev, struct task_struct *next)
{
	/*
         * prev now departs the cpu.  It's not interesting to record
         * stats about how efficient we were at scheduling the idle
         * process, however.
         */
	if (prev != rq->idle)
		sched_info_depart(rq, prev);

	if (next != rq->idle)
		sched_info_arrive(rq, next);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
44
83.02%
1
50.00%
Michael S. Tsirkin
9
16.98%
1
50.00%
Total
53
100.00%
2
100.00%


static inline void

sched_info_switch(struct rq *rq,
		  struct task_struct *prev, struct task_struct *next)
{
	if (unlikely(sched_info_on()))
		__sched_info_switch(rq, prev, next);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
32
82.05%
1
50.00%
Michael S. Tsirkin
7
17.95%
1
50.00%
Total
39
100.00%
2
100.00%

#else

#define sched_info_queued(rq, t)		do { } while (0)

#define sched_info_reset_dequeued(t)	do { } while (0)

#define sched_info_dequeued(rq, t)		do { } while (0)

#define sched_info_depart(rq, t)		do { } while (0)

#define sched_info_arrive(rq, next)		do { } while (0)

#define sched_info_switch(rq, t, next)		do { } while (0)
#endif /* CONFIG_SCHED_INFO */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Ingo Molnar
404
59.41%
3
20.00%
Ankita Garg
128
18.82%
1
6.67%
Michael S. Tsirkin
70
10.29%
2
13.33%
Josh Poimboeuf
35
5.15%
3
20.00%
Bharath Ravi
13
1.91%
1
6.67%
Frédéric Weisbecker
12
1.76%
1
6.67%
Mel Gorman
11
1.62%
1
6.67%
Naveen N. Rao
4
0.59%
1
6.67%
Rakib Mullick
2
0.29%
1
6.67%
Ken Chen
1
0.15%
1
6.67%
Total
680
100.00%
15
100.00%
Directory: kernel/sched

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.