[vfio-users] Huge performance decrease in VM

[Janusz]

share your vm xml/qemu command, so we can see what you are doing wrong.

On 01/06/2017 01:00 PM, Marius Steffen wrote:
> Hi,
> I'm running my VM on Arch for quite some time now, with varying success
> on this hardware:
>
> - NVIDIA GTX 1070
> - 16 GB RAM (10 GB passed through to VM, tested with/without hugepages)
> - i7 3770 (4 Cores, 4 Hyperthreads, various combinations tested)
> - virtualized OS is Windows 10 Home x64
>
> Arch is using my iGPU (unvirtualized), usally running KDE Plasma 5, but
> I also tried without running any X-Session.
>
> As I recently noticed when upgrading my GPU from a GTX 680 to my current
> GTX 1070, there's an extremely huge performance impact compared to
> running on native Windows.
> When playing Just Cause 3, this was especially noteable: I've often got
> only 40-50 FPS, compared to 75-120+ FPS in Windows 10, and my GPU being
> used just about 20% or so in the VM.
>
> Is there anything I can do to a) find the cause of this bad performance
> b) make my VM perform better?
>
> Greetings,
>
> Marius
>
>
> _______________________________________________
> vfio-users mailing list
> vfio-users at redhat.com
> https://www.redhat.com/mailman/listinfo/vfio-users