GPU rendering

[willDTF]

hi, not sure if it's implented or not for now from my side I only have CPU options, even with the experimental box turned on

best

[boberfly]

Hi @Kaiz3rTool

Currently I am getting GPU rendering to work via OpenCL on a Vega Frontier Edition & CUDA on a Geforce RTX 2070 (OptiX is a little stubborn though on my RTX 2070 I'm not too sure why that's not working yet).

Are you not getting the devices appearing in CyclesOptions ? Check if Blender 2.80 lets you pick any, it could be out of date drivers or no Cuda installed, by the looks of it they don't pre-build the kernels on the later Cuda versions for some reason.

[willDTF]

hi, i don't see any gpu device from gaffer

all is fine in blender where my 7 GPU are present :

maybe the problem come from that I was refering in the OSL issue thread, the Nvidia nvcc error I have on starting gaffercycles

which: no nvcc in (/opt/gaffer-0.54.2.0-linux/appleseed/bin:/opt/gaffer-0.54.2.0-linux/bin:/opt/gaffer-0.54.2.0-linux/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/william/.local/bin:/home/william/bin:/opt/Arnold/bin:/opt/3delight-1.4.1/bin:/mnt/Pipeline/Gaffer/deadline/bin:/opt/gafferCycles/bin)

[boberfly]

Whoa that's a lot of GPUs! It could be the fact that multiple ones of the same kind is tripping up my code here. I don't have such a configuration but perhaps I can go by this and track it down, or find a computer with more than two GPUs of the same kind...

If not, that nvcc error is suspicious so I'd see if you can install Cuda.

[willDTF]

haha yes, I have a bunch of them, I should have 8 one but one died last day so it's not visible here i can do some tests if needed for multigpu supports

the nvcc error was only with gaffercycles, nothing happened with other softwares or blender when using cycles cpu and gpu. I tried to install cuda, it seems to fix the problem as I dont have nvcc error and gpu is available in gaffer (I can see a single one),

for now it doesn't render as I have cuda 7.5 and it need 8.0 minimum I will let you know

cheers thanks !

[boberfly]

That's a better sign now. I made a late 0.10.1 build last night which builds up to sm7.5 hardware which I believe is RTX hardware, the line was missing from Cycles standalone but present in regular Blender which I think removes the need for nvcc at runtime. I was able to successfully run OptiX now after doing that but that requires Nvidia's 435.21 driver as a minimum.

[willDTF]

hi again, the last update works well to me with driver 430.50 (as I run it on server I use only Long Lived Branch drivers) I can now render on GPU

In the multi device part i can now see all my GPUs

About the optix part, I didn't found where to activate it

[boberfly]

Excellent! Although bare in mind I want to change this UI eventually so that it uses the +/- icons to add/remove devices as a list that can be interpreted as a varying sized list, that way if you launch a job on another machine it doesn't error if those devices are different but I need to figure out how to make that.

To get OptiX running you will need 435.21 minimum, apparently the logic for v7.0.0 onwards lives inside the driver, I believe it was a requirement for Blender to accept that and be compatible still with their license or something.

If you'd like we can discuss some things via email, I have a few things in-mind that I plan to do like incorporate some of the patches that don't exist in Blender 2.81 which I'd like to test out, especially on 7 2080ti's... ;)

[willDTF]

ok, I will wait a little to have long term driver with optix then, or maybe on a more basic system

ahah, sure ! you can write me at william-at-dothefilm.fr