Messages in this thread | | | Subject | Re: [PATCH v2 0/3] EM / PM: Inefficient OPPs | From | Lukasz Luba <> | Date | Wed, 26 May 2021 12:50:45 +0100 |
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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
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