Looking for a temporary test host with a nVIDIA GPU

olivierlambert

Hi!

Can you tell me a bit more about those cards?

Do they support PCI passthrough without driver modifications?
Is vGPU working with it?
How old are they?

imtrobin

I have a M60 if you need me to setup. It supports passthrough.

stormi

@imtrobin said in Looking for a temporary test host with a nVIDIA GPU:

I have a M60 if you need me to setup. It supports passthrough.

We found a way to test what we wanted to test on one host, but we'll need to test on more hosts, either now or when we'll release the beta. The test would be: install the 8.2 beta and check that the host starts correctly, with the XAPI reachable from XO.

thisisbenwoo

I have a test host right now with a GeForce GT730. Happy to use it as a test. I have been trying to get this darn NVIDIA to do passthrough so that I can run Folding@Home on a VM (using Docker I might add!!!), but the passthrough has not been successful so far, since it is not a commercial GPU.

olivierlambert

You need modified Nvidia drivers in the VM to make it work

thisisbenwoo

So I hear. But don't know where to look @olivierlambert . That said I'm more than happy to contribute what I can to the XCP-NG project. DM me

olivierlambert

I think you can find it on GitHub, I don't remember but I googled a bit about the error returned by the driver in the VM and found the patch

thisisbenwoo

Thanks. Did you still need a test bed for the next version of XO?

stormi

For the tests we had a need for 1 week ago, it's now fine, however I'll probably update this thread once we have an ISO image that can be tested by users that have such hardware. Note: it's not about using the GPU itself, but simply about making sure that the hypervisor works well with the changes we made to replace the not-built-by-us gpumon tool whose absence would make XCP-ng 8.1 unbootable (as we sadly found out after the release) with a dummy one built by us.

thisisbenwoo

No worries. Happy to help!

imtrobin

@olivierlambert said in Looking for a temporary test host with a nVIDIA GPU:

I think you can find it on GitHub, I don't remember but I googled a bit about the error returned by the driver in the VM and found the patch

It's been reported the patch is working on Xen, but I couldn't get it to work on XCP

olivierlambert

Are you sure we are talking about the same patch?

imtrobin

Not sure which one you are referring to, I'm referring to this

olivierlambert

I was talking about the modded Nvidia driver, which is a solution working inside the VM.

imtrobin

do you have a link to which one you are referring to?

nikade

I've got a NVIDIA card in my lab, but I probably need to install that driver you're talking about.
Are there any instructions on the wiki?

01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [NVS 510] (rev a1)

stormi

@stormi said in Looking for a temporary test host with a nVIDIA GPU:

For the tests we had a need for 1 week ago, it's now fine, however I'll probably update this thread once we have an ISO image that can be tested by users that have such hardware. Note: it's not about using the GPU itself, but simply about making sure that the hypervisor works well with the changes we made to replace the not-built-by-us gpumon tool whose absence would make XCP-ng 8.1 unbootable (as we sadly found out after the release) with a dummy one built by us.

Now is time for the tests I was talking about earlier. XCP-ng 8.2 beta is now available with our dummy gpumon and we need users who have nVIDIA GPUs to test it and give us feedback. There may be situations we have not tested where our dummy gpumon is not enough to make the XAPI happy, despite the fact that we don't support nVIDIA vGPUs (proprietary software from Citrix required for that feature).