Commit-ID: df217913e72ec7e603d8b68cc4c70646cf7000db Gitweb: http://git.kernel.org/tip/df217913e72ec7e603d8b68cc4c70646cf7000db Author: Vincent Guittot <vincent.guit...@linaro.org> AuthorDate: Tue, 8 Nov 2016 10:53:42 +0100 Committer: Ingo Molnar <mi...@kernel.org> 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.guit...@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Acked-by: Dietmar Eggemann <dietmar.eggem...@arm.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: morten.rasmus...@arm.com Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: bseg...@google.com Cc: kernel...@gmail.com Cc: p...@google.com Cc: yuyang...@intel.com Link: http://lkml.kernel.org/r/1478598827-32372-2-git-send-email-vincent.guit...@linaro.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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;
