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boberfly / GafferCycles

Cycles for Gaffer
BSD 3-Clause "New" or "Revised" License
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GPU not showing in devices #39

Closed kubo-von closed 4 years ago

kubo-von commented 4 years ago

My GPU is not showing in devices. It works fine with cycles in Blender both as optiX and CUDA device. Also GPU rendering with Arnold in gaffer works. Is this expected to work ? Are there any tricks to make it show up ? Thanks!

Fedora 31 RTX 2070, driver 440.44

boberfly commented 4 years ago

Hi @kubo-von

This is something which is happening for some people as well as the Windows build and I am not sure why, as it works great locally here in Linux with my RTX 2070. I have Cuda 10.2 installed so it might be why, but I am not sure what Blender is doing differently to make it work without the Cuda requirement (the cubin + optix ptx files are bundled with GafferCycles).

Cheers

kubo-von commented 4 years ago

After installing CUDA 10.2 rpm from here: https://developer.nvidia.com/cuda-downloads GPU shows up and works, both as CUDA and OPTIX device. Thanks a lot @boberfly !

boberfly commented 4 years ago

No worries @kubo-von but I would like to eventually get it to work without cuda so I will keep this open. Cheers!

boberfly commented 4 years ago

@kubo-von this build shouldn't need Cuda installed anymore: https://github.com/boberfly/GafferCycles/releases/tag/0.16.0

kubo-von commented 4 years ago

Hey @boberfly, I can confirm 0.16.0 has GPU working even after removing Cuda. Thanks!

boberfly commented 4 years ago

Hey @kubo-von

At least on Windows I am getting an error not finding the device in the console so it shows but it might not be working, I found a bug in Cycles itself where querying the devices twice gives different results. I am not sure if the devs will accept my patch so I have another idea to only do this query once. I'll keep this open until I do that.

boberfly commented 4 years ago

I think by https://github.com/boberfly/GafferCycles/commit/2bf952ad299c61f3cfcae2d32cc6ae95f60bac44 this should be resolved now and not fail to find the .cubin or .ptx files, nor fail on iterating available devices multiple times due to the IECoreCycles code caching all devices once at startup. Closing this one.