Commit-ID: 38d0f7708543bcfa03d5ee55e8346f801b4a59c9 Gitweb: http://git.kernel.org/tip/38d0f7708543bcfa03d5ee55e8346f801b4a59c9 Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Thu, 15 Aug 2013 19:47:56 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Mon, 2 Sep 2013 08:27:36 +0200
sched/fair: Remove duplicate load_per_task computations Since we already compute (but don't store) the sgs load_per_task value in update_sg_lb_stats() we might as well store it and not re-compute it later on. Signed-off-by: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/n/tip-ym1vmljiwbzgdnnrwp9az...@git.kernel.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/fair.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 4c6a8a5..5795219 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4476,7 +4476,6 @@ static inline void update_sg_lb_stats(struct lb_env *env, { unsigned long nr_running, max_nr_running, min_nr_running; unsigned long load, max_cpu_load, min_cpu_load; - unsigned long avg_load_per_task = 0; int i; /* Tally up the load of all CPUs in the group */ @@ -4531,9 +4530,9 @@ static inline void update_sg_lb_stats(struct lb_env *env, * the hierarchy? */ if (sgs->sum_nr_running) - avg_load_per_task = sgs->sum_weighted_load / sgs->sum_nr_running; + sgs->load_per_task = sgs->sum_weighted_load / sgs->sum_nr_running; - if ((max_cpu_load - min_cpu_load) >= avg_load_per_task && + if ((max_cpu_load - min_cpu_load) >= sgs->load_per_task && (max_nr_running - min_nr_running) > 1) sgs->group_imb = 1; @@ -4776,15 +4775,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s struct sg_lb_stats *local, *busiest; local = &sds->local_stat; - if (local->sum_nr_running) { - local->load_per_task = - local->sum_weighted_load / local->sum_nr_running; - } - busiest = &sds->busiest_stat; - /* busiest must have some tasks */ - busiest->load_per_task = - busiest->sum_weighted_load / busiest->sum_nr_running; if (busiest->group_imb) { busiest->load_per_task = -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
