The following commit has been merged into the sched/core branch of tip:
Commit-ID: cb0e4ee938b1a08507ded179cec3a35b4a8d75b8
Gitweb: https://git.kernel.org/tip/cb0e4ee938b1a08507ded179cec3a35b4a8d75b8
Author: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>
AuthorDate: Fri, 10 Sep 2021 18:18:16 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Sat, 18 Sep 2021 12:18:39 +02:00
sched/fair: Optimize checking for group_asym_packing
sched_asmy_prefer() always returns false when called on the local group. By
checking local_group, we can avoid additional checks and invoking
sched_asmy_prefer() when it is not needed. No functional changes are
introduced.
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Reviewed-by: Len Brown <len.brown@xxxxxxxxx>
Reviewed-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210911011819.12184-4-ricardo.neri-calderon@xxxxxxxxxxxxxxx
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index e26d622..d85c5a4 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8598,7 +8598,7 @@ static inline void update_sg_lb_stats(struct lb_env *env,
}
/* Check if dst CPU is idle and preferred to this group */
- if (env->sd->flags & SD_ASYM_PACKING &&
+ 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)) {
|