Hi Spam, On Mon, May 9, 2016 at 5:28 AM, Spam House <kthxplz...@gmail.com> wrote:
> ... > Is it correct that if my hyperv is spoofed properly I no longer need this > in my xml? > > <kvm> > <hidden state='on'/> > </kvm>.. > > As far as I know, we still need to hide the KVM CPUID from Windows 10 guest and to use the custom Hyper-V vendor ID in order to make NVIDIA GPU work with recent driver version. On Sun, May 8, 2016 at 5:10 PM, Alex Williamson <alex.william...@redhat.com> > wrote: > >> On Sun, 8 May 2016 16:35:39 -0500 >> Spam House <kthxplz...@gmail.com> wrote: >> >> > Thibaut, >> > >> > Thanks for the info. The performance difference I am measuring with >> 3dmark >> > firestrike. >> > >> > Unraid Win10 VM (QEMU/KVM): >> > Overall Score = 14037 >> > Graphics = 17152 >> > >> > Arch Win10 VM (QEMU/KVM) >> > Overall Score = 12085 >> > Graphics = 13658 >> > >> > I have not fully implemented huge pages yet but the CPU performance >> seems >> > to be about the same. The gpu specifically has greatly reduced >> performance. >> >> >> Hyper-v features are known not to make much difference for 3dmark. >> Tune the CPU type, CPU topology, pin vCPUs, and use hugepages. >> > I am using similar GPU as yours (MSI GTX 980 Ti Gaming 6G, with slightly overclock +100MHz GPU clock and +100MHz VRAM clock) and I also use Arch Linux as the hypervisor and I have scored 19332 in Fire Strike Graphics [1]. I am using stock Arch Linux kernel 4.5.2-1-ARCH with modified config: 1.) 1000 MHz clock resolution (eliminate mini stutters on Witcher 3) [2] 2.) Voluntary preemption scheduling (I use ZFS and it prefers this) [2][3] 3.) Madvise hugepages (skippable, but seems to help keeps RAM usage of other host processes lower than using THP) 4.) CRIU config (skippable, absolutely not related so just skip this) [4] If you are using kernel between 4.2.x and 4.5.1 (inclusive), you should reduce halt_poll_ns parameter manually [5]. As Alex suggested, use explicit hugepages to improve performance. I did not do any vCPU pinning and my CPU topology resembles the host. I am not using libvirt though, just plain old QEMU script. [6] [1] http://www.3dmark.com/3dm/11946102 [2] https://bbs.archlinux.org/viewtopic.php?pid=1270311#p1270311 [3] https://github.com/zfsonlinux/zfs/issues/1701 [4] https://criu.org/Installation#Configuring_the_kernel [5] https://www.redhat.com/archives/vfio-users/2016-April/msg00017.html [6] http://pastebin.com/GHBCrR74 Best regards, Okky Hendriansyah
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