Messages in this thread Patch in this message | | | From | Jiang Biao <> | Subject | [PATCH RFC] sched/fair: simplfy the work when reweighting entity | Date | Tue, 4 Aug 2020 15:12:22 +0800 |
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If a se is on_rq when reweighting entity, all we need should be updating the load of cfs_rq, other dequeue/enqueue works could be redundant, such as, * account_numa_dequeue/account_numa_enqueue * list_del/list_add from/into cfs_tasks * nr_running--/nr_running++
Just simplfy the work. Could be helpful for the hot path.
Signed-off-by: Jiang Biao <benbjiang@tencent.com> --- kernel/sched/fair.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 04fa8dbcfa4d..18a8fc7bd0de 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3086,7 +3086,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, /* commit outstanding execution time */ if (cfs_rq->curr == se) update_curr(cfs_rq); - account_entity_dequeue(cfs_rq, se); + update_load_sub(&cfs_rq->load, se->load.weight); } dequeue_load_avg(cfs_rq, se); @@ -3102,7 +3102,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, enqueue_load_avg(cfs_rq, se); if (se->on_rq) - account_entity_enqueue(cfs_rq, se); + update_load_add(&cfs_rq->load, se->load.weight); } -- 2.21.0
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