Re: [PATCH v2 0/3] EM / PM: Inefficient OPPs

[Lukasz Luba]

On 5/26/21 11:39 AM, Lukasz Luba wrote:
>

[snip]

To summarize:
- we don't want to disable some OPPs
- we want to give a 'hint' from energy perspective
- we rely on SchedUtil 2nd stage which clamps this
freq hint value to allowed OPPs which might set
actually not the one what we see as 'efficient'
-- we don't harm some existing platform which might
   needs these 'inefficient' OPPs in some use cases
- we pay some extra cost in this SchedUtil freq
switch path, which shouldn't harm too much.
-- we pay this cost only for arm/arm64 platforms
   which use EM
-- this cost is balanced by the benefit that we see in
   benchmarks and measured energy
-- the LUT might limit the impact

I hope this would help to better understand the scope and
impact of this patch set.

Regards,
Lukasz