See https://bbs.archlinux.org/viewtopic.php?id=162768 first post. See if you 
need ignore_msrs or allow_unsafe_interrupts. I had similar issue with and board 
and some module options fixed it I think.

Sent from my Samsung device

-------- Original message --------
From: Andrei Grigore <andrei....@gmail.com> 
Date: 10/8/16  10:49  (GMT+02:00) 
To: Jayme Howard <g.pr...@gmail.com> 
Cc: vfio-users <vfio-users@redhat.com> 
Subject: Re: [vfio-users] Significant FPS drop with AMD and GTX970 

Unfortunately, that didn't help. Thanks for the sugestion though!

On Oct 8, 2016 03:06, "Jayme Howard" <g.pr...@gmail.com> wrote:
Check to see if you have MSI enabled.  That'd be my bet.  Alex had a blog post 
that covered it, but I don't have the link handy.
On Fri, Oct 7, 2016 at 6:39 PM, Andrei Grigore <andrei....@gmail.com> wrote:
Hi all,
I was wondering if anyone is experiencing this and if there is a known fix for 
it.
I am using ArchLinux with latest stable Kernel, qemu and libvirt.
My CPU is FX-8230 with a GTX 970. I've passed thorugh the GPU to a Win10 guest.
In WoW on bare metal i get 90 fps and in the same area with the same graphic 
settings on the VM i get around 50. There seems to be no cpu and or ram 
bottlenet and the GPU seems to be quite gully used since the fans are starting 
to spin quite soon.
Can anyone help here with a suggestion? I saw reports with about 3% performance 
drop, but I am experiencing a lot more.
Thanks!

Andrei.

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