Number of CPU cores...

[iTiunov]

How many CPU cores/threads V-Ray can use. Is 60 threads a maximum?

Thank You!

[iTiunov]

Why 60... Just tested on 40/80 cores/threads machine... Only 60 are in use. Windows 2008 R2, 3ds max 2012 and maya 2012, vray 2.0.

[iTiunov]

I've figure out the problem. There is now support for CPU groups in V-Ray and maybe in 3ds Max and Maya too. So it can only utilize one group with 60 cores but there is another group with 20 cores that idle. Can Chaos Group add support for CPU groups in future releases?

[vlado]

Yep, we are working on supporting processors groups for future versions of V-Ray.

For the moment, you can run a V-Ray DR spawner on the same machine assigned to a different processor group and use it to render a single image.

Best regards,
Vlado

[iTiunov]

Thank You! I'll test it tomorrow.

[iTiunov]

Is there any way to point application to specific CPU group? Command line argument for example?

[iTiunov]

One more question. Can I run two instances of V-Ray DR spawner? One on CPU group #0 and one on CPU group #1?

Thank You!

[GatesB]

Why 60... Just tested on 40/80 cores/threads machine... Only 60 are in use. Windows 2008 R2, 3ds max 2012 and maya 2012, vray 2.0.

Okay, how much does a 40 core system costs?

[bazuka]

u dont want to know check here

[iTiunov]

Here is some tests. I have DR Spawner running on CPU group #1 (60 cores) and 3ds max 2012 running on CPU group #0 (20 cores). Total CPU load reaches 50% maximum. All cores of group #0 and 20 cores (different ones, changing from time to time) of group #1 is active. Still can't load 100% of machine resources.

P.S. Can't do same thing with Maya. Cause DR for maya works different way...

[iTiunov]

3ds max on group #1 (60 cores) and DR Spawner on group #0 (20 cores). Works!!! 100% CPU load.

[iTiunov]

BTW render time 4 times longer on 100% CPU load compare to 50% CPU load... Very strange...

[iTiunov]

Just make some test again:
1) 3ds max - 60 cores, dr spawner - 20 cores. 100% CPU load. 1 hour 20 minutes per frame;
2) 3ds max - 20 cores, dr spawner - 60 cores. 50% CPU load. 20 minutes per frame;

VERY STRANGE results...

P.S. Same scene. About 18 GB memory load (64 GB total onboard).