this post was submitted on 21 Feb 2024
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What is the technology of being able to access PCIe devices over IP called? (lemmy.world)
submitted 9 months ago* (last edited 9 months ago) by MigratingtoLemmy@lemmy.world to c/selfhosted@lemmy.world
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Is it RDMA? Is it a modification of SR-IOV?

I'm having trouble even trying to find out more about this since the RDMA definition just says "remote access to device memory" and I'd like to confirm if that includes virtual instances of PCIe devices over the network.

Essentially, I'm looking for a way to share virtual instances of supported PCIe devices over IP. I.e. If you have a GPU, you can create virtual slices of it with SR-IOV on KVM-based hypervisors. I'm looking for something that will take this and make it available over IP.

I have come across Infiniband and QLogic, Mellanox and HP and IBM and RDMA support on Debian and all of that. I just need someone to ELI5 this to me so I know where/what to search and see if what I want is really even possible with FOSS.

I know that Nutanix allows one to serve PCIe hardware over IP on their hypervisor, but I plan to stick with FOSS as far as possible.

Thanks!

Edit: Please let me know what makes my post so hard to grasp - the answer was simple RoCE/iWARP. RDMA is definitely the underlying technology that offers access to the memory of the device whilst bypassing the kernel for good performance; security considerations aside, this is a very good idea since RoCE/iWARP work on the UDP/IP and the TCP/IP stack, making them routable.

Apologies if my post didn't make the most sense, I tried to describe it the best I could. Thanks

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[–] tagginator@utter.online 0 points 9 months ago

New Lemmy Post: What is the technology of being able to access PCIe devices over IP called? (https://lemmy.world/post/12243907)
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