[VGPU] Multiple VGPUs on one VM

Jahson Babel jahson.babel at cc.in2p3.fr
Wed Jan 19 08:54:18 UTC 2022

Hello folks,

I've seen a thread on vGPUs on this mailing list lately and I was 
wondering if multiple vGPUs are supported on one VM on OpenStack.

 From the OpenStack's documentation this seems pretty clear that it's 
not. ( https://docs.openstack.org/nova/latest/admin/virtual-gpu.html)
But on Nvidia's side multiple vGPUs  should be able to be possible on 
specific Linux KVM version. 
Only true for RHEL systems maybe.

So which one of those pieces of information should I follow ? Presumably 
the OpenStack's side is the correct one but I would like to be sure.
And does anyone has been able to attach multiples vgpus on one VM ?
Another side question that I have in mind despite the fact that I can't 
see how it could possibly work. Is it possible to over-commit the vGPUs 
resources ? Via the placement API ?

Thanks in advance.


Jahson Babel

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