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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@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Reviewed-by: Len Brown <len.brown@intel.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lkml.kernel.org/r/20210911011819.12184-4-ricardo.neri-calderon@linux.intel.com
This commit is contained in:
Ricardo Neri 2021-09-10 18:18:16 -07:00 committed by Peter Zijlstra
parent 16d364ba6e
commit 6025643596
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/fair.c
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@ -8631,7 +8631,7 @@ 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)) {