Re: [RFC PATCH 0/7] sched: cpufreq: Remove magic margins

Qais Yousef
2023-09-08T14:11:10Z

On 09/08/23 15:59, Peter Zijlstra wrote:
> On Fri, Sep 08, 2023 at 02:33:36PM +0100, Qais Yousef wrote:
>
> > > (even hardware has these things today, we get 0-255 values that do
> > > 'something' uarch specific)
> >
> > Ah, could I get some pointers please?
>
> Intel HWP.EPP and AMD CPPC EPP I think.. both intel-pstate and
> amd-pstate have EPP thingies.

Okay, thanks!

So do you see tying this to the presence of some hardware mechanisms and
provide a fallback for the other systems to define it somehow would be the best
way to explore this?

Cheers

--
Qais Yousef