Defect: No recover after GPU VRAM overflow

Problem

Description:

If I manage to make a bigger simulation (more particles) than fits into the VRAM, Lucid wont work, which is so far excusable and expected.

BUT, the VRAM don't gets emptied when resimulation with a small, fitting scene. No Lucid trick, nor a 3dsmax restart helps. Only solution so far is log off and on again in Windows. Then the VRAM is emptied again.

To make thinks complicated we do not have this behaviour on all workstations, I would say on 50%-70%.

We use multiple, equal Dell workstations running Windows 10, GTX 980 4 GB VRAM, driver 365.10, 64GB RAM

I know that Lucid normally empties VRAM on simulation start, but not after overflow here.

Steps to Reproduce:

Make big simulation with very small particle size to use more vram than the graphics card have.

Try to simulate something smaller after this. Does it work in 100% of cases?

Title:	No recover after GPU VRAM overflow
Category:	Crash/Critical
Status:	Open
Posted By:	vklein ( v.klein@mediaprojekt.tv )
Date Created:	10 June 2016

10 June 2016 #8626
EPHERE	Hmm, yes, this one's tricky. We pass off the simulation to Flex. I'll need to investigate more if we can prevent these types of errors somehow. I suppose one workaround could be to limit the particle count further in Global Flex Settings, to disallow simulations with too many particles. But if VRAM is not emptied after a simulation then it is a different problem. Marsel Khadiyev (Software Developer, EPHERE Inc.)

Summary

Problem