Re: [PATCH 4/4 v2] sched/fair: reduce busy load balance interval

[Valentin Schneider]

On 21/09/20 08:24, Vincent Guittot wrote:
> The busy_factor, which increases load balance interval when a cpu is busy,
> is set to 32 by default. This value generates some huge LB interval on
> large system like the THX2 made of 2 node x 28 cores x 4 threads.
> For such system, the interval increases from 112ms to 3584ms at MC level.
> And from 228ms to 7168ms at NUMA level.
>
> Even on smaller system, a lower busy factor has shown improvement on the
> fair distribution of the running time so let reduce it for all.
>
> Reviewed-by: Phil Auld <pauld@xxxxxxxxxx>
> Signed-off-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>

Reviewed-by: Valentin Schneider <valentin.schneider@xxxxxxx>