Very large scene GPU/CUDA Error

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Very large scene GPU/CUDA Error

Postby davidyannick_1 » Thu May 28, 2020 10:31 am

davidyannick_1 Thu May 28, 2020 10:31 am
I have a big scane (terrain 17 000 000 polys) and 60 000 trees instances, when I try to render it in Redshift it's very fast but with Octane here is the result :

*** OCTANE API MSG: CUDA error 2 on device 0: out of memory
*** OCTANE API MSG: -> failed to allocate device memory
*** OCTANE API MSG: CUDA error 2 on device 0: out of memory
*** OCTANE API MSG: -> failed to allocate device memory
*** OCTANE API MSG: CUDA error 2 on device 0: out of memory
*** OCTANE API MSG: -> failed to allocate device memory
*** OCTANE API MSG: CUDA error 2 on device 0: out of memory
*** OCTANE API MSG: -> failed to allocate device memory
*** OCTANE API MSG: Out-of-core memory limit exceeded
*** OCTANE API MSG: CUDA error 2 on device 0: out of memory
*** OCTANE API MSG: -> failed to allocate device memory

My pc : I7 8700k - 64go RAM - 1080Ti with latest studio drivers

Any idea ?
Thx
davidyannick_1
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Re: Very large scene GPU/CUDA Error

Postby juanjgon » Thu May 28, 2020 12:08 pm

juanjgon Thu May 28, 2020 12:08 pm
Have you tried to break the terrain objects into two objects? Octane has some limitations related to how many polygons can be stored in a single OBJ node, so perhaps this is the problem. If this doesn't help, you could try to enable the out of core feature to check if the problem is that the scene doesn't fit in the available GPU memory.

Thanks,
-Juanjo
Computer Graphics Software Developer
Octane plugin development and support: LightWave and Houdini
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Re: Very large scene GPU/CUDA Error

Postby davidyannick_1 » Thu May 28, 2020 12:41 pm

davidyannick_1 Thu May 28, 2020 12:41 pm
juanjgon wrote:Have you tried to break the terrain objects into two objects? Octane has some limitations related to how many polygons can be stored in a single OBJ node, so perhaps this is the problem. If this doesn't help, you could try to enable the out of core feature to check if the problem is that the scene doesn't fit in the available GPU memory.

Thanks,
-Juanjo


ok gonna try do you what is the size limit per obj ?
thx
davidyannick_1
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Re: Very large scene GPU/CUDA Error

Postby juanjgon » Thu May 28, 2020 12:49 pm

juanjgon Thu May 28, 2020 12:49 pm
It depends on the number of attributes, like UV maps, and so on. It could be just around these 17 MPolygons, but it is hard to say.

Thanks,
-Juanjo
Computer Graphics Software Developer
Octane plugin development and support: LightWave and Houdini
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Re: Very large scene GPU/CUDA Error

Postby davidyannick_1 » Thu May 28, 2020 1:12 pm

davidyannick_1 Thu May 28, 2020 1:12 pm
juanjgon wrote:It depends on the number of attributes, like UV maps, and so on. It could be just around these 17 MPolygons, but it is hard to say.

Thanks,
-Juanjo

ok thanks for the info :)
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