VRAY Swarm clarification needed

[ntavian]

SO lately I have been getting the blue screen of death followed by a system reboot.
windows event view is telling me that its a critical error Kernel-Power 41 (63), now this only happens when rendering a scene both in Sketchup and 3d Studio max,
I did find a work around in Sketchup that when I turn on cap utilization in the SWARM area, my computer does not crash out
so my question is what exactly does this cap actually do? the VRAY help doc says this
"When enabled V-Ray will render using only one CPU core of the local machine. Additionally, Swarm will continue to use a small percentage of the local machine's resources to communicate with the render node machines."
my IT guys are trying to figure this out and maybe I have 1 bad CPU core out of the six in my BOX? or is the swarm now only using a small percentage of the machines resources with the CAP on
I'm no PC expert but where else can I look to find out more about this crash

please help as this is driving me nuts

[delineator]

I would try some burn in tests, like prime95 or aida64 and see if you get the same issues. Seems to be hardware issue when your cores (or ram) are maxed out. Theoretically, you computer should still run even if you are trying to render several machines at once using 100% of your cpu power and/or you use more ram than you have installed. That's how its designed, but if your crashing out when your stressing the computer, then I would guess its a hardware/power/cooling issue.

[Peter.Chaushev]

Hello,

This does look like a hardware issue indeed, not sure if it is even related to our software.
When rendering, V-Ray tries to use up as much of the CPU as possible. The "Cap CPU Utilization" setting limits the usage to 1 core. Alternatively, there is an environment variable which specifies the number of threads used:
VRAY_NUM_THREADS ? Manually set the number of computation threads. By default (when "Max Render Threads" is 0) V-Ray creates one computational thread per CPU core. (https://docs.chaosgroup.com/display/...ment+Variables)

Are you able to pinpoint when exactly the crash first occurred and can you link it to any change you've introduced to your system?
Have you changed anything on your OS recently (installed new update, drivers, etc)?
What are the full version numbers of your V-Ray for SketchUp and V-Ray for 3ds max?
Is the problem reproducible when running a render on GPU?

Answers to all this plus any additional info about your machine (OS, drivers versions; hardware specs, etc) would be greatly appreciated! Please send an email at support@chaosgroup.com (make sure you mention this forum thread).

Kind regards,
Peter

[ntavian]

Thanks Peter, I will get this info to you ASAP