Messages in this thread | | | Subject | Re: [PATCH v3 0/5] Refactor thermal pressure update to avoid code duplication | From | Lukasz Luba <> | Date | Tue, 9 Nov 2021 08:29:21 +0000 |
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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
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