XPU tests (with sample scene)

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GCharb: Member; 279 posts; Joined: June 2016; Offline

Oct. 27, 2021 1:29 p.m.

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]

Edited by GCharb - Oct. 28, 2021 08:46:25

Attachments:
Clipboard-1.jpg (1.3 MB)
Clipboard-2.jpg (1.4 MB)


rmagee: Staff; 1185 posts; Joined: July 2005; Offline

Oct. 27, 2021 1:31 p.m.

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]

Robert Magee
Senior Product Marketing Manager
SideFX


GCharb: Member; 279 posts; Joined: June 2016; Offline

Oct. 27, 2021 1:34 p.m.

rmagee
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]

Thanks a bunch, so far I am loving it, R&D did a great job for sure!


jarenas: Member; 146 posts; Joined: Jan. 2018; Offline

Oct. 27, 2021 2:34 p.m.

rmagee
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]

It seems Karma doesn't support nested dielectrics in H19, is it planned to support it eventually? the table doesn't specify...


PolyMarvels: Member; 915 posts; Joined: Sept. 2018; Offline

Oct. 27, 2021 3:04 p.m.

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: Member; 279 posts; Joined: June 2016; Offline

Oct. 27, 2021 3:06 p.m.

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.

No requirements specific to XPU it seems, only one GPU at the moment, might change in the future!
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 - Oct. 27, 2021 15:10:08


jsmack: Member; 8043 posts; Joined: Sept. 2011; Offline

Oct. 27, 2021 3:07 p.m.

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: Staff; 2551 posts; Joined: Sept. 2007; Offline

Oct. 27, 2021 4:33 p.m.

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
Senior Quality Assurance Specialist
SideFX


jsmack: Member; 8043 posts; Joined: Sept. 2011; Offline

Oct. 27, 2021 4:49 p.m.

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.


mark: Staff; 2641 posts; Joined: July 2005; Offline

Oct. 27, 2021 9:34 p.m.

jsmack
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.

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: Member; 279 posts; Joined: June 2016; Offline

Oct. 27, 2021 9:47 p.m.

mark
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).

Sharp eyed indeed, this is very cool, now if GPU prices could come down, that would be perfect timing, thanks for the info!


GCharb: Member; 279 posts; Joined: June 2016; Offline

Oct. 27, 2021 10:07 p.m.

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:

Edited by GCharb - Oct. 28, 2021 04:59:38

Attachments:
RhinoScene.zip (7.8 MB)
Clipboard-3.jpg (1.1 MB)
Clipboard-4.jpg (1.2 MB)


Sygnum: Member; 119 posts; Joined: Aug. 2015; Offline

Oct. 28, 2021 1:56 a.m.

Where is the rhino model coming from? I`d like to test on my machine, AMD Ryzen 5950X and RTX 3080 TI


Sygnum: Member; 119 posts; Joined: Aug. 2015; Offline

Oct. 28, 2021 2:11 a.m.

I found it on the net and kind of matched it up.

Render times in my case :

XPU: 1M 25S

Attachments:
H19.png (2.2 MB)


GCharb: Member; 279 posts; Joined: June 2016; Offline

Oct. 28, 2021 2:41 a.m.

Sygnum
Where is the rhino model coming from? I`d like to test on my machine, AMD Ryzen 5950X and RTX 3080 TI

Look at my post, I shared the full scene!

Edited by GCharb - Oct. 28, 2021 03:09:47


Sygnum: Member; 119 posts; Joined: Aug. 2015; Offline

Oct. 28, 2021 3:42 a.m.

GCharb
Sygnum
Where is the rhino model coming from? I`d like to test on my machine, AMD Ryzen 5950X and RTX 3080 TI
Look at my post, I shared the full scene!

Yeah, I opened that but the rhino file loader pointed to an external file and doesn't show up, only the backdrop thing.


FaitelTech: Member; 105 posts; Joined: July 2019; Offline

Oct. 28, 2021 3:52 a.m.

It's pointing to $JOB/geo/rhino.geo but should to $HIP/geo/rhino.bgeo


FaitelTech: Member; 105 posts; Joined: July 2019; Offline

Oct. 28, 2021 4:01 a.m.

1280x720
XPU: 6m 14s
GPU: Nvidia 2060 super

Attachments:
rhino.png (2.3 MB)


GCharb: Member; 279 posts; Joined: June 2016; Offline

Oct. 28, 2021 4:58 a.m.

Faitel
It's pointing to $JOB/geo/rhino.geo but should to $HIP/geo/rhino.bgeo

I fixed the file, thanks for pointing it out!

Attachments:
RhinoScene.zip (7.8 MB)


sekow: Member; 238 posts; Joined: Nov. 2013; Offline

Oct. 28, 2021 5:11 a.m.

01:24 XPU
(01:07) second try
Threadripper 3995wx
Titan RTX
2080 Ti RTX

beautiful thing to see all threads on all devices maxed out

Edited by sekow - Oct. 28, 2021 05:14:22

http://www.sekowfx.com [www.sekowfx.com]

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