[vfio-users] Gpu passthrough poor performance.

[rndbit]

Try these:
> ~ % cat /etc/modprobe.d/kvm.conf
> options vfio_iommu_type1 allow_unsafe_interrupts=1
> options kvm              ignore_msrs=1
> options kvm-amd          npt=0


On 2015.11.11 15:50, Manvir Singh wrote:
> I've finally got windows 10 working and booting in fedora 23 with GPU
> passthrough only problem now is I get very low fps in any game. Let's
> take for example GTA 5 I kept my settings for GTA 5 that I used
> previously on windows that I know are good settings giving me decent
> fps as I've used the settings before. So it's not the settings being
> too high that's causing this. I give the VM all but one of my 8 cores
> checking for a CPU performance problem and still the fps was very low.
> Also another thing in GTA 5 if I go to settings it says I only have
> 512MB of vram when I have 3GB. Also if I open AMD catalyst control
> center it doesn't show my card there however if I disable then
> reenable the driver/card from device manager in windows then GTA 5 and
> AMD catalyst control center both recognize the card but doing this
> causing artefacts. I'm using latest AMD BETA drivers from there site.
>
> [Host]
> OS: Fedora 23
> CPU: FX-8350
> MOBO: GA-990FXA-UD3
> http://www.gigabyte.com/products/product-page.aspx?pid=4672#ov
> GPU: R9 280 x2 (passing only one card to the vm using the other card
> on host)
> RAM: 16GB
>
> [Vm]
> OS: Windows 10
> CPU: host-passthrough
> GPU: Second R9 280
> Ram: 8GB
> Type: UEFI, BIOS (I've tried both it doesn't seem to make a deference)
>
>
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> vfio-users at redhat.com
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