On Thu, Jul 30, 2020 at 08:58:09AM -0400 Prarit Bhargava wrote:
> On 7/27/20 8:28 AM, Phil Auld wrote:
> > On Mon, Jul 27, 2020 at 06:58:32AM -0400 Prarit Bhargava wrote:
> >> On 7/24/20 4:56 PM, GitLab Bridge on behalf of prauld wrote:
> >>> From: prauld on gitlab.com
> >>>
> >>> CONFIG_ENERGY_MODEL will help make the schedutil frequency governor
> >>> more accurate. This will be useful in the future. It also enables
> >>> the use of the energy aware scheduler.
> >>>
> >>> Signed-off-by: Phil Auld <[email protected]>
> >>
> >> pauld, I was looking at this config the other day.  I was wondering if it
> >> changes the existing default scheduler choice?
> >>
> >
> > It allows the use of Energy aware scheduling which is primarily (currently
> > only) for assymetric systems. It doesn't change the default scheduler 
> > classes.
> > We'll still get CFS be default with the option to do RT and Deadline as 
> > before.
> >
> > I don't think RHEL currently deals with assymetric CPU capacity yet. But 
> > that
> > may change. I wanted to get it enabled for ELN so that if/when we do need it
> > it will be there w/o potential kABI issues.
> >
> > Primarily, there is interest in making the schedutil frequency governor the
> > default and this relies on having the eneregy model built.  Right now we use
> > the performance governor in RHEL but if schedutil gets to where it provides
> > the same performance while still being able to reduce power when less busy
> > then that could change.
> >
> > Just enabling this config should not change that.
> >
> >
> > Cheers,
> > Phil
> >
> >
> 
> I can't remember if I acked this or not.  In any case a second one won't
> do any harm.
> 
> Acked-by: Prarit Bhargava <[email protected]>
>

That's the first one, thanks!


Cheers,
Phil


> P.

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