[RESEND][PATCH v2 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage

Lukasz Luba lukasz.luba at arm.com
Tue Mar 26 01:28:31 PDT 2024



On 3/25/24 19:17, Krzysztof Kozlowski wrote:
> On 22/03/2024 12:08, Lukasz Luba wrote:
>> When the voltage for OPPs is adjusted there is a need to also update
>> Energy Model framework. The EM data contains power values which depend
>> on voltage values. The EM structure is used for thermal (IPA governor)
>> and in scheduler task placement (EAS) so it should reflect the real HW
>> model as best as possible to operate properly.
>>
>> Based on data on Exynos5422 ASV tables the maximum power difference might
>> be ~29%. An Odroid-XU4 (with a random sample SoC in this chip lottery)
>> showed power difference for some OPPs ~20%. Therefore, it's worth to
>> update the EM.
>>
>> Signed-off-by: Lukasz Luba <lukasz.luba at arm.com>
>> ---
>>   drivers/soc/samsung/exynos-asv.c | 11 ++++++++++-
>>   1 file changed, 10 insertions(+), 1 deletion(-)
> 
> I assume there is dependency, even though cover letter did not mention
> it, so:
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

Thanks Krzysztof for the review. Yes, it touches driver in your tree
indeed. Hopefully it can goes smoothly via Rafael's tree with your
tag.

Regards,
Lukasz



More information about the linux-arm-kernel mailing list