Open Stack

Thank you so much! This is what I was looking for. It is very odd that
we buy a pricey card but then we have to buy a license to make those
features available.

On Mon, Jan 17, 2022 at 2:07 PM Gustavo Faganello Santos
<gustavofaganello.santos at windriver.com> wrote:
>
> Hello, Satish.
>
> I've been working with vGPU lately and I believe I can answer your
> questions:
>
> 1. As you pointed out in question #2, the pci-passthrough will allocate
> the entire physical GPU to one single guest VM, while vGPU allows you to
> spawn from 1 to several VMs using the same physical GPU, depending on
> the vGPU type you choose (check NVIDIA docs to see which vGPU types the
> Tesla V100 supports and their properties);
> 2. Correct;
> 3. To use vGPU, you need vGPU drivers installed on the platform where
> your deployment of OpenStack is running AND in the VMs, so there are two
> drivers to be installed in order to use the feature. I believe both of
> them have to be purchased from NVIDIA in order to be used, and you would
> also have to deploy an NVIDIA licensing server in order to validate the
> licenses of the drivers running in the VMs.
> 4. You can see what the instructions are for each of these scenarios in
> [1] and [2].
>
> There is also extensive documentation on vGPU at NVIDIA's website [3].
>
> [1] https://docs.openstack.org/nova/wallaby/admin/virtual-gpu.html
> [2] https://docs.openstack.org/nova/wallaby/admin/pci-passthrough.html
> [3] https://docs.nvidia.com/grid/13.0/index.html
>
> Regards,
> Gustavo.
>
> On 17/01/2022 14:41, Satish Patel wrote:
> > [Please note: This e-mail is from an EXTERNAL e-mail address]
> >
> > Folk,
> >
> > We have Tesla V100 32G GPU and I’m trying to configure with openstack wallaby. This is first time dealing with GPU so I have couple of question.
> >
> > 1. What is the difference between passthrough vs vGPU? I did google but not very clear yet.
> > 2. If I configure it passthrough then does it only work with single VM ? ( I meant whole GPU will get allocate to single VM correct?
> > 3. Also some document saying Tesla v100 support vGPU but some folks saying you need license. I have no idea where to get that license. What is the deal here?
> > 3. What are the config difference between configure this card with passthrough vs vGPU?
> >
> >
> > Currently I configure it with passthrough based one one article and I am able to spun up with and I can see nvidia card exposed to vm. (I used iommu and vfio based driver) so if this card support vGPU then do I need iommu and vfio or some other driver to make it virtualize ?
> >
> > Sent from my iPhone
> >