BackPup/Linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-25 21:21:09 -04:00
Code Issues Packages Projects Releases Wiki Activity

sched/fair: Factorize attach/detach entity

Browse Source 
Factorize post_init_entity_util_avg() and part of attach_task_cfs_rq()
in one function attach_entity_cfs_rq().

Create symmetric detach_entity_cfs_rq() function.

Signed-off-by: Vincent Guittot <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Dietmar Eggemann <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Vincent Guittot
2016-11-16 10:29:08 +01:00
committed by Ingo Molnar
parent 893c5d2279
commit df217913e7
1 changed files with 31 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/sched/fair.c
+31 -22
View File
@@ -701,9 +701,7 @@ void init_entity_runnable_average(struct sched_entity *se)
}
static inline u64 cfs_rq_clock_task(struct cfs_rq *cfs_rq);
static int update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq, bool update_freq);
static void update_tg_load_avg(struct cfs_rq *cfs_rq, int force);
static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se);
static void attach_entity_cfs_rq(struct sched_entity *se);
/*
* With new tasks being created, their initial util_avgs are extrapolated
@@ -735,7 +733,6 @@ void post_init_entity_util_avg(struct sched_entity *se)
struct cfs_rq *cfs_rq = cfs_rq_of(se);
struct sched_avg *sa = &se->avg;
long cap = (long)(SCHED_CAPACITY_SCALE - cfs_rq->avg.util_avg) / 2;
u64 now = cfs_rq_clock_task(cfs_rq);
if (cap > 0) {
if (cfs_rq->avg.util_avg != 0) {
@@ -763,14 +760,12 @@ void post_init_entity_util_avg(struct sched_entity *se)
* such that the next switched_to_fair() has the
* expected state.
*/
se->avg.last_update_time = now;
se->avg.last_update_time = cfs_rq_clock_task(cfs_rq);
return;
}
}
update_cfs_rq_load_avg(now, cfs_rq, false);
attach_entity_load_avg(cfs_rq, se);
update_tg_load_avg(cfs_rq, false);
attach_entity_cfs_rq(se);
}
#else /* !CONFIG_SMP */
@@ -8783,30 +8778,19 @@ static inline bool vruntime_normalized(struct task_struct *p)
return false;
}
static void detach_task_cfs_rq(struct task_struct *p)
static void detach_entity_cfs_rq(struct sched_entity *se)
{
struct sched_entity *se = &p->se;
struct cfs_rq *cfs_rq = cfs_rq_of(se);
u64 now = cfs_rq_clock_task(cfs_rq);
if (!vruntime_normalized(p)) {
/*
* Fix up our vruntime so that the current sleep doesn't
* cause 'unlimited' sleep bonus.
*/
place_entity(cfs_rq, se, 0);
se->vruntime -= cfs_rq->min_vruntime;
}
/* Catch up with the cfs_rq and remove our load when we leave */
update_cfs_rq_load_avg(now, cfs_rq, false);
detach_entity_load_avg(cfs_rq, se);
update_tg_load_avg(cfs_rq, false);
}
static void attach_task_cfs_rq(struct task_struct *p)
static void attach_entity_cfs_rq(struct sched_entity *se)
{
struct sched_entity *se = &p->se;
struct cfs_rq *cfs_rq = cfs_rq_of(se);
u64 now = cfs_rq_clock_task(cfs_rq);
@@ -8818,10 +8802,35 @@ static void attach_task_cfs_rq(struct task_struct *p)
se->depth = se->parent ? se->parent->depth + 1 : 0;
#endif
/* Synchronize task with its cfs_rq */
/* Synchronize entity with its cfs_rq */
update_cfs_rq_load_avg(now, cfs_rq, false);
attach_entity_load_avg(cfs_rq, se);
update_tg_load_avg(cfs_rq, false);
}
static void detach_task_cfs_rq(struct task_struct *p)
{
struct sched_entity *se = &p->se;
struct cfs_rq *cfs_rq = cfs_rq_of(se);
if (!vruntime_normalized(p)) {
/*
* Fix up our vruntime so that the current sleep doesn't
* cause 'unlimited' sleep bonus.
*/
place_entity(cfs_rq, se, 0);
se->vruntime -= cfs_rq->min_vruntime;
}
detach_entity_cfs_rq(se);
}
static void attach_task_cfs_rq(struct task_struct *p)
{
struct sched_entity *se = &p->se;
struct cfs_rq *cfs_rq = cfs_rq_of(se);
attach_entity_cfs_rq(se);
if (!vruntime_normalized(p))
se->vruntime += cfs_rq->min_vruntime;