[vfio-users] testing request: quirks

[Marcel Bieberbach]

Hi,
I've modified Arch's qemu-git PKGBUILD from AUR to build from your repo and
branch and everything is running fine.
Everything being:
both OVMF-Windows 10 VMs started by libvirtd, each with a graphics card
using vfio (other devices using classic non-vfio methode I think)
 - with a R9 280X and Intel USB3 hub, where the Soundcard/DAC is connected
to, playing music in foobar and running the Valley benchmark
 - with a 750Ti, Intel USB2 hub and onboard Sound, playing a Youtube Video
 - the host with onboard Intel iGPU, running a little OSX-Safari-Testing
qemu started via command line doing nothing, and compiling original
qemu-git again (on 2 virtual cores, that sucks... but pinning helps a lot)

There was no unusual log output, no sound problems apart from a little lag
only once(!) including sound and the benchmark was frozen for 100-200ms.
Accaptable as the host is realy busy, even the browser I'm writing this
mail within the host is laggy.

Only thing to notice: drastically lower FPS in the benchmark than in
another recent scenario where host and second VM where busy. I think your
branch is based on an older git revision? Gonna retest with the current git
version soon.

Regards,
Marcel

2015-09-03 23:00 GMT+02:00 Alex Williamson <alex.williamson at redhat.com>:

> Hey folks,
>
> I've been re-writing the QEMU vfio-pci quirks to be cleaner as well as
> more extensible and maintainable.  I think that I have not regressed
> anything and my testing agrees, but there are more of you than me.
> These quirks are mostly what makes AMD and Nvidia GPU assignment work
> (plus rtl NICs, but that only seems to work for the one NIC on my
> motherboard anyway).
>
> For those of you who are able and familiar with building an running
> upstream QEMU, I'd appreciate your testing feedback.  The branch is
> available here:
>
> https://github.com/awilliam/qemu-vfio 20150903-quirks
>
> You can either clone this directly and checkout the branch:
>
> $ git clone git://github.com/awilliam/qemu-vfio qemu-vfio.git
> $ git checkout 20150903-quirks
>
> Or if you have an existing QEMU git clone, you can add me as a remote
> and checkout the branch:
>
> $ git remote add qemu-vfio git://github.com/awilliam/qemu-vfio
> $ git remote update qemu-vfio
> $ git checkout qemu-vfio/20150903-quirks
>
> I'd appreciate any testing and feedback.  If you do test it, please
> report back along with the assigned device, the guest OS, and for GPUs
> whether they're being used with x-vga=on or not.  Also note that I don't
> expect any improvements that will have fixed anything not previously
> working.  If you think you've found a regression, the above branch is
> based on QEMU 2.4.0, so please carefully verify whether the issue is
> really a regression or the current state of QEMU.  Thanks!
>
> Alex
>
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>
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