[vfio-users] Tesla K40 passthrough

[Eddie Yen]

Yes, I'm using QXL+Spice connect to VM, and also try TeamViewer.
Funny is, if I disable QXL and Spice, just using TeamViewer connect to VM,
Windows can boot, but got black screen and mouse cursor glitches.

So that means I still need to find another graphic accelerated remote
desktop (like RemoteFX or sth.) ?

2016-01-08 1:20 GMT+08:00 Alex Williamson <alex.williamson at redhat.com>:

> On Thu, 2016-01-07 at 14:28 +0800, Eddie Yen wrote:
> > Hello, guys.
> >
> > Few days ago I got Tesla K40 and try to passthrough it into VM.
> >
> > Using Windows 7 as guest, and the virtual VGA is QXL.
> > Every installation works fine, I don't have to add kvm=off and x-vga=on.
> > Tested on CUDA and OpenCL, both works.
> >
> > But now is a problem, how can I make 3D acceleration works on K40?
> > I knew that K40 didn't have any VGA output, so I got slow motion when
> playing video and rotate 3D models in some 3D program like Autodesk.
> >
> > My guess is, K40's 3D acceleration only works at 3D rendering, it didn't
> work in viewing 3D models.
> > Does anyone have a idea?
> >
> > Also I found that virtio-gpu is available since QEMU 2.5+. But not work
> on Windows guest yet.
> > Is that can make a simple graphic accleration on Windows?
>
> How are you connecting to the VM, just the QXL display?  Rendering into
> the emulated graphics framebuffer is possible, but you lose most of the
> performance.  I've never used a Tesla personally, but with GRID, which
> is also a headless GPU, you'll generally want to disable the emulated
> graphics (happens automatically with win7) and use guest-based remote
> desktop solutions to access the accelerated desktop.  Minimally a vnc
> server running inside the guest, though that burns a lot of CPU.  There
> are more performant commercial solutions.
>
> virtio-gpu is a different beast.  Once we have windows drivers there
> you'll be able to get GPU offload from any host GPU supporting gallium,
> but it's not clear when that driver will come or how much that will
> enable games.  You certainly wouldn't have access to CUDA or PhysX or
> GPU specific SDKs in the guest using virtio-gpu.  Thanks,
>
> Alex
>
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