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Davide Bestetti avatar image
Davide Bestetti asked ·

AMD 3990 - Arnold IPR laggy?

I recently bought a new workstation with an AMD 3990x.My previous workstation (it now become full rendering machine) has an AMD 2990WX.

I work with Maya-Arnold mainly on CPU.When doing sequence renderings the new processor is a beast.

I'm experimenting annoying lags when working with Arnold IPR.

The video shows a comparison between the two CPU's, both with Maya 2020 and Arnold6 latest version, 3 UI saved threads (i also tried on the 3990x saving more than 3 threads in the Arnold SystemTab).

https://youtu.be/zjCi7FpPDdc

As you can see with the 2990 IPR is extremely less laggy while trasforming objects, changing parameters.

Anyone could suggest a way to fix this orrendous lag? I use IPR a lot.

Thanks in advance

David

arnoldmtoaipr
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Thiago Ize avatar image
Thiago Ize answered ·

Thanks for reporting it can't scale past 64 threads. I think I know what the issue might be and that this is a Windows only issue. I have made an internal arnold core ticket for fixing it.

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Davide Bestetti avatar image
Davide Bestetti answered ·

Hi @

After some more tests it seems like Arnold6 IPR can not handle more than 64 threads.
If you put -64 under "threads" in the Arnold System tab, IPR lag is over.
Using 65+ threads lag comes out again.

I think we should wait for an improvement...AMD is projected too far in the future ;))


David

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Tomas Kollar answered ·

Same situation here (3990X, 128GB RAM@3200MHz) IPR lags so much that I have to pause it when I need to transform objects or changing parameters.

Better optimization would be much appreciated.

( I also tried saving threads like David did, but it doesn't help )

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