Re: [PATCH 1/3] sched/fair: Prepare variables for increased precision of EAS estimated energy

[Lukasz Luba]

On 7/7/21 11:32 AM, Vincent Guittot wrote:
> On Wed, 7 Jul 2021 at 12:29, Lukasz Luba <lukasz.luba@xxxxxxx> wrote:
> > On 7/7/21 11:11 AM, Vincent Guittot wrote:
> > > On Wed, 7 Jul 2021 at 12:06, Lukasz Luba <lukasz.luba@xxxxxxx> wrote:
> > > >
> >
> > [snip]
> >
> > > > No. It's in 0.1uW scale, so 800Watts. Which is 16 CPUs * 64Watts
> > >
> > > Oh! you want 0.1uW precision .... This doesn't seem realistic at all.
> > > I'm not even sure that the power model can even reach an accuracy of
> > > 1mW
> >
> > True, the EM is registering platform with 1mW precision, but 1uW
>
> Do you mean 1uW or 0.1uW ?

In this patch set I've proposed 0.1uW, but I'm open to drop one
order of magnitude. The 1uW still be good.