Checking the file ‘/sys/class/misc/mali0/device/gpuinfo’ shows: ‘Mali-G52 2 cores r0p0 0x7212’ Running clinfo shows: ‘Max compute units 2 Max clock frequency 750MHz’ Running Ubuntu 20.04.1 with 4.9.241 Kernal on emmc Checking the Vim 3 specs shows G52 MP4, wondering if its an issue with th…

Check this topic. MP4 does not mean 4 cores. [image] Which chip has the best GPU? General Discussion Of all the current and past CPUs which one has the best GPU? I didnt know for a while that the GPU was in the CPU there were other chips on the boards and i thoght they …

Thanks. I should have done more research. It is possible to change the max frequency up or down from 750?

@JoshuaPeddle you can do something like this: echo 600000000 > /sys/devices/platform/soc/ffe40000.gpu/devfreq/ffe40000.gpu/min_freq echo 600000000 > /sys/devices/platform/soc/ffe40000.gpu/devfreq/ffe40000.gpu/max_freq this was on the mainline kernel, I believe the names change slightly with the BS…

Thanks, I’ll take a look and post the results for anyone else looking.

Hi, I am using the default os (Android) and kernel with khadas vim3. Its mali G52 is dvfs capable? If yes, where I can set its frequency? I cannot find the devfreq for its mali driver.

@Ehsan I am not sure about the fbdev driver or android, you can try using kernel aduitor for system management (I use it for underclocking my VIM3’s CPU), but in mainline now with the panfrost driver you can try something like: echo 600000000 > /sys/devices/platform/soc/ffe40000.gpu/devfreq/ffe4000…

Thank you for your reply. I checked it but there is no such directory (I search all directories). I find two related directories: /sys/class/misc/mali0/device/ /sys/devices/platform/ffe40000.bifrost/ In both of them these items exist: core_mask dvfs_period js_scheduling_period…

I am not really sure what can be done, maybe take some tips from @clort76 he might have something in mind for you :slightly_smiling_face:

Dear @clort76 would you please let me know if you know about gpu dvfs. Best, Ehsan

[image] Electr1: /sys/devices/platform/soc/ffe40000.gpu/devfreq/ffe40000.gpu/max_freq Ehsan’s 4.9 kernel seems to have different info in /sys/devices and /sys/class from my Linux Khadas 5.10.0-rc6 I didn’t know what gpu dvfs is, websearch says dynamic voltage and frequency scaling. I run…

Vim 3 looks to be using G52 MP2 not MP4?

VIM3

numbqq January 18, 2021, 2:11am 2

Check this topic.

MP4 does not mean 4 cores.