Re: [PATCH v2 1/3] sched/fair: fix rounding issue for asym packing

[Vincent Guittot]

On Wed, 19 Dec 2018 at 15:59, Valentin Schneider
<valentin.schneider@xxxxxxx> wrote:
>
>
>
> On 19/12/2018 13:39, Vincent Guittot wrote:
> [...]
> >> I used that setup out of convenience for myself, but AFAICT that use-case
> >> just stresses that issue.
> >
> > After looking at you UC in details, your problem comes from the wl=1
> > for cpu0 whereas there is no running task.
> > But wl!=0 without running task should not be possible since fdf5f3
> > ("wsched/fair: Disable LB_BIAS by default")
> >
> > This explain the 1023 instead of 1022
> >
> >
>
> True, I had a look at the trace and there doesn't seem to be any running
> task on that CPU. That's a separate matter however - the rounding issues
> can happen regardless of the wl values.

But it means that the rounding fix +1 works and your problems comes
from something else