Intel 12900K Vray render node low CPU usage issue

V-Ray V-Ray for Maya Issues
1

Hi,

I recently installed Intel 12900K CPU on one of Vray (for Maya) render node machines. When I start a render from my main machine I noticed that not all cores are running on 12900K. Turns out only E cores are being utilized while P cores are sitting idle at 0% making render times very inefficient.
I suspect this is because with the new Intel P/E cores architecture CPU is treating Vray slave service as a background process hence only using E-cores which are very slow for rendering. Is there a way that Vray could force this CPU to use 100% of its cores?

Currently I am running Process Lasso app to force CPU to use all the cores with Vray, but I would very much like to have this working without using another app.

I’m using last version of Vray Next and Maya 2018

2

Check this thread.

3

An update to the linked thread contains an unofficial fix, and the official Chaos stance on the issue.

https://forums.chaos.com/forum/v-ray-for-3ds-max-forums/v-ray-for-3ds-max-problems/1130125-new-cpu-12900kf-do-not-render-all-cores?p=1143539#post1143539