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 <pauld(a)redhat.com>
>> 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.
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 <prarit(a)redhat.com>
That's the first one, thanks!