Thank you for the information.  I have a quick question.

[root@gpu01 ~]# lspci | grep -i nv
5e:00.0 3D controller: NVIDIA Corporation GV100GL [Tesla V100S PCIe
32GB] (rev a1)
d8:00.0 3D controller: NVIDIA Corporation GV100GL [Tesla V100S PCIe
32GB] (rev a1)

In the above output showing two cards does that mean they are physical
two or just BUS representation.

Also i have the following entry in openstack flavor, does :1 means
first GPU card?

{"gpu-node": "true", "pci_passthrough:alias": "tesla-v100:1"}






On Tue, Jan 18, 2022 at 5:55 AM António Paulo <antonio.paulo@cern.ch> wrote:
>
> Hey Satish, Gustavo,
>
> Just to clarify a bit on point 3, you will have to buy a vGPU license
> per card and this gives you access to all the downloads you need through
> NVIDIA's web dashboard -- both the host and guest drivers as well as the
> license server setup files.
>
> Cheers,
> António
>
> On 18/01/22 02:46, Satish Patel wrote:
> > 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@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
> >>>
> >