Re: [PATCH v3 0/5] Refactor thermal pressure update to avoid code duplication

Lukasz Luba
2021-11-09T08:31:16Z

Hi Steev,

That's interesting what you've done with Rockchip RK3399.
I would like to reproduce your experiment on my RockPI 4B v1.3.
Could you tell me how you to add this boost frequency that you have
mentioned in some previous emails?

I want to have similar setup to yours and I'll check all the subsystems
involved in the decision making process for triggering this boost freq.

On 11/8/21 11:21 PM, Steev Klimaszewski wrote:
> Hi Thara,
>> Hi Steev,
>>
>> IIUC, PineBook Pro has Rockchip RK3399 which has 2 Cortex A-72 and 4
>> Cortex A-52 where as C630 has Qualcomm sdm845 which has 4 Cortex A-75
>> and 4 Cortex A-55. Task placements and subsequently cpu load will be
>> different for both the platforms. With the same workload, I will
>> expect Rockchip to system to be more loaded than sdm845. Having said
>> that, what cpu-freq governor are you using on both the systems.
>>
> I'm using sched-util on both of the systems.
>
> I've tried a number of different ways of forcing builds only on the A-75
> cores, and I simply cannot get the load to be "enough" to kick in the
> boost frequency.
>
> An example being
>
> git clone https://github.com/zellij-org/zellij.git
>
> cd zellij
>
> taskset --cpu-list 4-7 cargo build --release
>
> git clean -fdx
>
> taskset --cpu-list 6-7 cargo build --release

Thanks for the pointers, I'll give it a try when I sort out this
Rockchip boost setup.

>
>
> On my C630, it never goes higher than 85C with the 4 cores being used,
> and with 2, it never goes about 65C and I do not get any 2.96GHz.  It's
> currently sitting at "6" in the time_in_state for 2965800.
>
>
> --steev
>

Thank you for your support.

Regards,
Lukasz