Intel Flex GPU with SR-IOV for GPU accelarated VDIs
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@sanjay
Definitely in agreement here. Getting Flex integration with XCP-ng is a no-brainer to me. Hopefully Vates is working on it. If not...Maybe there's a way to fund or prioritize the development? -
@olivierlambert I was researching these flex series gpu’s for the “vgpu” function and to avoid the hassle/ licensing of Nvidia. The flex 140 is listed as compatible (by dell) with my PowerEdge R760 server’s. Is support for this or another gpu (for vgpu not just pci pass through) in development or planned?
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We have 0 flex GPUs so we cannot even test this. Also, there's no demand at the moment for this, explaining we have other priorities. However, our next platform (XCP-ng 9) will have a more recent dom0 kernel, that might help if it doesn't work today.
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@olivierlambert I do not mind purchasing the GPU, installing on a test server (R760 2x Intel cpu) and providing ssh or a vpn to this server if that would help?
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I have 0 idea on what's needed to make it work (even if it's possible) so first it would be just testing it (if that works out of the box) and if not, trying to understand why it doesn't, and then estimate the amount of work needed.
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I can't believe that there's not much interest.
Anyway...As far as I know these are pretty well supported in newer kernels. I think you need to be fairly deep in kernel 6. Given that XCPng/XenServer is currently running on kernel 4 with a bunch of backports, this might be a little problematic.
Last I knew, Intel is not charging licensing fees for using vGPUs like NVidia does.
With a working driver in XCP-ng and no licensing fees, this is could be a real cost-effective VDI platform.
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If it really requires a 6.x kernel, this will at least wait for XCP-ng 9
And regarding the demand, you are officially the first to ask for it 
edit: the second one after OP
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@JamesG There probably is interest from homelab people, but for use in production setups, I don't really see a lot of businesses needing it.
VDI isn't really used that much by businesses now (at least the ones that do use it are slowly moving off it) and most that do use it don't need GPU acceleration. Often times it's for pretty basic applications, medical record systems, etc...
So I think that is where the lack of demand is coming from.
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@planedrop we are far from home lab and exploring alternatives to VMware because of a 7 digit yearly subscription fee
. We use gpu’s in around 75 host to reduce cpu load and free up cpu resources. We have a lot of single thread applications requiring higher speed and fewer cores so gpu’s free up the resources for that software -
@jebrown Yeah I just meant in general, not specific to you. I think most businesses aren't looking for this kind of specific workload so the demand isn't very high for it.
Are you currently using Intel GPUs with Flex for this use case? Or NVidia right now and just looking to change? It might be worth considering leaving VDI, not sure if you're in the position to be able to argue that, but there are often better solutions now.
Either way, I would personally also love to see this, I just think there are other things that more companies are asking for from XCP-ng right now.
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I have not tried the flex (yet, but I can install and test it) do you have an alternative to recommend? I’m open to suggestions on that as well. I just seen the open source drivers and no additional licensing. Majority of the current set up requiring vgpu is done with nivida and VMware…… not everything we have needs gpu but the systems Using or needing the extra power from graphics are in windows and being used 24/7 and just accessed on site by thin client’s. we moved away from any type of cloud provided daas to have better reliability on critical systems and prevent down time.
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I asked about this in the Discord server a little while ago. To be honest, one of my employers would love Flex vGPU support. We've been needing to update both our general compute and engineering VDIs so we've been looking at some solutions.
While NVIDIA vGPU pricing isn't horrible, it requires us to have VMware infrastructure which is significantly more expensive (obviously). So we'd really like NVIDIA and/or Intel vGPU support, but understand that it isn't just a few lines of code that needs written and is a very small subset of XCP-ng users. Especially with the alleged uncertainty of Intel right now, it may not even be worth developing anything for their cards, but that's personal conjecture.
I've been building my own VDI solution for XO(A), but that's been stalled for a little bit due to burnout, but I plan on finishing a prototype solution and writing a setup guide in a few weeks. So if you want something for just general compute, keep an eye out!
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Generally speaking...Just because you haven't had direct requests doesn't mean the feature isn't desired.
It's easy enough to look over the current features and because it's not listed, you assume it's not there and move on to find the next viable solution.
Proxmox and OpenShift seem to be killing it in this space with Intel Flex GPU's.
