Re: [PATCH v5 1/5] sched/fair: Ignore SIS_UTIL when has idle core

From: Tim Chen
Date: Wed Sep 14 2022 - 17:58:52 EST


On Fri, 2022-09-09 at 13:53 +0800, Abel Wu wrote:
> When SIS_UTIL is enabled, SIS domain scan will be skipped if the
> LLC is overloaded even the has_idle_core hint is true. Since idle
> load balancing is triggered at tick boundary, the idle cores can
> stay cold for the whole tick period wasting time meanwhile some
> of other cpus might be overloaded.
>
> Give it a chance to scan for idle cores if the hint implies a
> worthy effort.

Reviewed-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
>