Commit-ID: df217913e72ec7e603d8b68cc4c70646cf7000db
Gitweb: http://git.kernel.org/tip/df217913e72ec7e603d8b68cc4c70646cf7000db
Author: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
AuthorDate: Tue, 8 Nov 2016 10:53:42 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 16 Nov 2016 10:29:08 +0100
sched/fair: Factorize attach/detach entity
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 <vincent.guittot@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Acked-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Morten.Rasmussen@xxxxxxx
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: bsegall@xxxxxxxxxx
Cc: kernellwp@xxxxxxxxx
Cc: pjt@xxxxxxxxxx
Cc: yuyang.du@xxxxxxxxx
Link: http://lkml.kernel.org/r/1478598827-32372-2-git-send-email-vincent.guittot@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/fair.c | 53 +++++++++++++++++++++++++++++++----------------------
1 file changed, 31 insertions(+), 22 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5e6c00a..0731aff 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -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;
--
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