On Mon, Jan 23, 2017 at 11:48 PM, Tiit Talts <itv...@gmail.com> wrote:
> QEMU 2.8+ > Kernel 4.8 @ Debian 8 > > Guest OS: Windows 10 > > H/W: CPU: AMD FX-8300, MB: GA-990XA-UD3, GPU: GTX 1080 > > FPS in games are great 150+/- @ normal details, but i have periodic fps > drops from 150 to 30-20fps when i move in game. i noticed that when i stand > still in Battlefield 4 no fps drops everything is fine but if is start > moving i get fps drops. > > Other info: > > > perf kvm --host stat live > When gaming most VM-Exits are msr and interrupt > > > GRUB: > > BOOT_IMAGE=/vmlinuz-4.8.0-0.bpo.2-amd64 root=/dev/mapper/debian--vg-root > ro iommu=pt amd_iommu=on > > /etc/modprobe.d/kvm.conf > > options kvm ignore_msrs=1 > options kvm_amd npt=0 > > /etc/modules > > kvm > kvm_amd > vfio > vfio_iommu_type1 > vfio_pci > vfio_virqfd > > Any advice, quit VM or burn down AMD platform ? > > Hi Tiit, Any chance that your kernel flags for your clock resolution is not high enough? What about your pre-emption scheduling? I found my clock resolution set to 1000 Hz and voluntary pre-emption scheduling fully eliminates stutters in Witcher 3. Best regards, Okky
_______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
