Hello,
This is how I build a cpuset shield at vm boot: https://github.com/qdel/scripts/blob/master/vfio/scripts/shieldbuild And how I break it: https://github.com/qdel/scripts/blob/master/vfio/scripts/shieldbreak They are called threw libvirt hooks. In conjunction to tickles cpu, 1kHz frequency, and rcu offloading. It work pretty well. As I emulate nearly nothing, I can even compile on Linux without feeling anything on Windows. (i passthrough only pcie, not anything else) These scripts are old. I will try to update them during the day. On 24 Jan 2017 5:35 a.m., "Okky Hendriansyah" <okky....@gmail.com> wrote: > 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 > >
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