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VirGL – A virtual 3D GPU for use inside QEMU virtual machines

docs.mesa3d.org

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Re: VirGL – A virtual 3D GPU for use inside QEMU virtual machines

#81
post #63

Earlier quoted context omitted.

Interesting info. It seemed like a reasonable common one to me over the past decade on the web.

I can’t really blame you, it’s a perfectly reasonable concatenation imo. Pretty sure I’ve at least rarely seen it over the years as well. That said, he is correct that now “nix” is going to likely be popularly associated (especially with tech types that love excessive things) with the Nix language, package manager, and NixOS, which has really been gaining steam. Especially these past few years. It was what I first th…

...And of course after the edit window is over, it occurs to me I got my wires crossed. "Concatenation" is adding two strings/words.

What I meant was "contraction".

Re: VirGL – A virtual 3D GPU for use inside QEMU virtual machines

#82
post #71

Earlier quoted context omitted.

AMD supports VFIO on most of their cards. All of the RDNA based cards support it. Even some pre-RDNA ones too, and with a recent-ish driver NVIDIA's Geforce line supports it too without hacks. Problem isn't really HW support, its that the software side is super glitchy and its not all that easy to configure and in most cases requires a 2nd GPU if you still want basic host functions. Where as VirGL is much easier to g…

Unfortunately AMD cards suffer from a reset bug, still, when used with passthrough. The reset bug being that you can pass through the card fine, once. But if you try to pass it through again (or the card experiences an issue and needs to reset), they get caught in some kind of bad state and won’t work until power is removed and restored. Which requires a reboot or a only slightly less disruptive dance with system pow…

You could also be in a fun grey area where your 6600XT will sometimes reset properly and allow the physical host to reclaim it for its own purposes. Or not and require a full forced shutdown and reboot to restore proper function.

Let's just say I'm very aware of AMD's issues in this area :P

Also looking glass is pretty great though it's use of the Desktop Duplication API seemed to carry with it a huge performance hit. Or rather did the last time I used it (it's been a while)

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