XPU tests (with sample scene)
36484 93 6- GCharb
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I am testing Houdini 19 XPU render with the bar scene, it took 7M 44S to render with XPU on an 8cores AMD and a GTX 1650 with 4GB of VRAM, some bits don't seem to work and I get an Optix error, but it's darn fast, CPU 1H 23M 40S, but much cleaner render, but still, XPU is very promising indeed!
I made a second test and I am sharing the scene file on this post:
https://www.sidefx.com/forum/topic/81348/#post-350453 [www.sidefx.com]
I made a second test and I am sharing the scene file on this post:
https://www.sidefx.com/forum/topic/81348/#post-350453 [www.sidefx.com]
Edited by GCharb - 2021年10月28日 08:46:25
- rmagee
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This chart shows what is in Karma CPU and Karma XPU compared to Mantra:
https://www.sidefx.com/faq/question/karma-vs-mantra/ [www.sidefx.com]
https://www.sidefx.com/faq/question/karma-vs-mantra/ [www.sidefx.com]
Robert Magee
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Senior Product Marketing Manager
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- GCharb
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rmageeThanks a bunch, so far I am loving it, R&D did a great job for sure!
This chart shows what is in Karma CPU and Karma XPU compared to Mantra:
https://www.sidefx.com/faq/question/karma-vs-mantra/ [www.sidefx.com]
- jarenas
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rmageeIt seems Karma doesn't support nested dielectrics in H19, is it planned to support it eventually? the table doesn't specify...
This chart shows what is in Karma CPU and Karma XPU compared to Mantra:
https://www.sidefx.com/faq/question/karma-vs-mantra/ [www.sidefx.com]
- PolyMarvels
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Nice, thanks for sharing. I wonder what are the minimum specs for XPU and Karma. For Renderman I know min spec for your GPU is at least 12GB or VRAM.
QA Specialist at Greyscalegorilla |PolyMarvels YT: https://www.youtube.com/channel/UCqXuTLiaL-jqvn3LK1XlwHg [www.youtube.com] | Instagram: https://www.instagram.com/polymarvels/?hl=en [www.instagram.com]
- GCharb
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SIgor420No requirements specific to XPU it seems, only one GPU at the moment, might change in the future!
Nice, thanks for sharing. I wonder what are the minimum specs for XPU and Karma. For Renderman I know min spec for your GPU is at least 12GB or VRAM.
https://www.sidefx.com/Support/system-requirements/ [www.sidefx.com]
Since they only support Nvidia, I wonder if they'll ever support NVLINK?
Edited by GCharb - 2021年10月27日 15:10:08
- jsmack
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SIgor420
Nice, thanks for sharing. I wonder what are the minimum specs for XPU and Karma. For Renderman I know min spec for your GPU is at least 12GB or VRAM.
There isn't really a set minimum VRAM, it depends on the size of the scene. More VRAM means being able to render more complex scenes with more, larger textures.
- chrism
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GCharb
only one GPU at the moment, might change in the future!
https://www.sidefx.com/Support/system-requirements/ [www.sidefx.com]
From the system requirements page:
GPU acceleration currently does NOT make use of multiple OpenCL devices (i.e. two or more graphics cards) but this may change at a future date. An exception to this is Karma XPU, which is currently in Alpha.
Chris McSpurren
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Senior Quality Assurance Specialist
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- jsmack
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- mark
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jsmackI don't think we've tried Nvlink, but we have tried multiple GPUs. In fact, one sharp eyed person noticed that in this Entagma video, it looks like there are 4 GPUs working with alongside the CPU to render the image: https://youtu.be/tI4zqTezniI?t=602 [youtu.be] (top right corner of the Karma render).GCharb
Since they only support Nvidia, I wonder if they'll ever support NVLINK?
XPU uses Optix, an Nvidia library. Perhaps Mark can speak to Nvlink support.
- GCharb
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markSharp eyed indeed, this is very cool, now if GPU prices could come down, that would be perfect timing, thanks for the info!
I don't think we've tried Nvlink, but we have tried multiple GPUs. In fact, one sharp eyed person noticed that in this Entagma video, it looks like there are 4 GPUs working with alongside the CPU to render the image: https://youtu.be/tI4zqTezniI?t=602 [youtu.be] (top right corner of the Karma render).
- GCharb
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A second test, this time I build a simple Solaris scene with MaterialX shaders, I reduced the scan model to 280k polygons, this time I get no OptiX error, still rendered on an AMD 8-core CPU and a GTX 1650 GPU with 4 GB of VRAM, I used no denoise, I would love to know how fast this renders under XPU compared to CPU only, but with a decent CPU/GPU combo!
I rendered to mplay at 1280 X 720 pixels
XPU: 10:49
CPU: 55:07
You can download the full scene directory below:
I rendered to mplay at 1280 X 720 pixels
XPU: 10:49
CPU: 55:07
You can download the full scene directory below:
Edited by GCharb - 2021年10月28日 04:59:38
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