WaitForPresentFeb 10
Is there anything like Dx12 SetStablePowerMode available on linux?
Show threadJosh SimmonsFeb 10

@WaitForPresent on which hardware? I'm not sure if there's a useful cross-vendor API hooked up anywhere but getting stable clocks on amd is a matter of writing some values to some files.

https://docs.kernel.org/gpu/amdgpu/thermal.html profile_peak / profile_standard here for amdgpu.

GPU Power/Thermal Controls and Monitoring — The Linux Kernel documentation

Show threadPhilip TrettnerFeb 10

@dotstdy @WaitForPresent I got `echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor` for that (works on the intel/amd I use)

EDIT: apparently this needs cpufreq kernel stuff and might not work reliably, but at least it's a term to look up

EDIT2: this is _CPU_, not _GPU_, my bad

Show threadJosh SimmonsFeb 10
@artificialmind @WaitForPresent that's CPU scaling rather than GPU, and setting the governor itself is not exactly sufficient anymore.
Show threadPhilip TrettnerFeb 10
@dotstdy @WaitForPresent Oh wow missing some coffee here, totally misread that, sorry!
Show threadJosh SimmonsFeb 10
@artificialmind @WaitForPresent no biggie, there's also "game mode" which sets a bunch of these tunables automatically. But not useful for profiling alas.
Show threadPhilip Trettner
@dotstdy @WaitForPresent Ok but I found similar knobs for NVidia in nvidia-smi: https://docs.nvidia.com/deploy/nvidia-smi/index.html (-lgc and -lmc are for locking clock rates). Global, requires root, requires specific values, BUT might make for a better benchmarking experience anyways.
Feb 10 at 12:58pmWeb
Show threadJosh SimmonsFeb 10
@artificialmind @WaitForPresent one more thing, if you use something like VK_KHR_performance_query, on amd hardware that will put your GPU into profile clocks. Idk if there's an extension I'm missing which lets you specify it directly.
Show threadWaitForPresentFeb 10
@dotstdy @artificialmind Yeah that does not seem to be a thing (the VK_KHR_performance_query part) on the proprietary Nvidia driver at least.