Re: [RFC PATCH 0/7] Introduce thermal pressure

[Vincent Guittot]

Hi  Juri,

On Wed, 10 Oct 2018 at 14:23, Juri Lelli <juri.lelli@xxxxxxxxx> wrote:
>
> On 10/10/18 14:04, Vincent Guittot wrote:
>
> [...]
>
> > The problem was the same with RT, the cfs utilization was lower than
> > reality because RT steals soem cycle to CFS
> > So schedutil was selecting a lower frequency when cfs was running
> > whereas the CPU was fully used.
> > The same can happen with thermal:
> > cap the max freq because of thermal
> > the utilization with decrease.
> > remove the cap
> > the utilization is still low and you will select a low OPP because you
> > don't take into account cycle stolen by thermal like with RT
>
> What if we scale frequency component considering the capped temporary
> max?

Do you mean using a kind of scale_thermal_capacity in accumulate_sum
when computing utilization ?