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

From: Juri Lelli
Date: Wed Oct 10 2018 - 08:23:59 EST

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