From aafc917a3c31dcc76cb0279cd7617dda11b15f2a Mon Sep 17 00:00:00 2001 From: Ricardo Neri Date: Fri, 10 Sep 2021 18:18:18 -0700 Subject: [PATCH] sched/fair: Carve out logic to mark a group for asymmetric packing Create a separate function, sched_asym(). A subsequent changeset will introduce logic to deal with SMT in conjunction with asmymmetric packing. Such logic will need the statistics of the scheduling group provided as argument. Update them before calling sched_asym(). Co-developed-by: Peter Zijlstra (Intel) Signed-off-by: Ricardo Neri Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Joel Fernandes (Google) Reviewed-by: Len Brown Reviewed-by: Vincent Guittot Link: https://lkml.kernel.org/r/20210911011819.12184-6-ricardo.neri-calderon@linux.intel.com --- kernel/sched/fair.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 2e8ef33..1c8b5fa 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8571,6 +8571,13 @@ group_type group_classify(unsigned int imbalance_pct, return group_has_spare; } +static inline bool +sched_asym(struct lb_env *env, struct sd_lb_stats *sds, struct sg_lb_stats *sgs, + struct sched_group *group) +{ + return sched_asym_prefer(env->dst_cpu, group->asym_prefer_cpu); +} + /** * update_sg_lb_stats - Update sched_group's statistics for load balancing. * @env: The load balancing environment. @@ -8631,18 +8638,17 @@ static inline void update_sg_lb_stats(struct lb_env *env, } } + sgs->group_capacity = group->sgc->capacity; + + sgs->group_weight = group->group_weight; + /* Check if dst CPU is idle and preferred to this group */ if (!local_group && env->sd->flags & SD_ASYM_PACKING && - env->idle != CPU_NOT_IDLE && - sgs->sum_h_nr_running && - sched_asym_prefer(env->dst_cpu, group->asym_prefer_cpu)) { + env->idle != CPU_NOT_IDLE && sgs->sum_h_nr_running && + sched_asym(env, sds, sgs, group)) { sgs->group_asym_packing = 1; } - sgs->group_capacity = group->sgc->capacity; - - sgs->group_weight = group->group_weight; - sgs->group_type = group_classify(env->sd->imbalance_pct, group, sgs); /* Computing avg_load makes sense only when group is overloaded */ -- 2.7.4