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. On Sun, May 8, 2016 at 4:12 PM, thibaut noah <thibaut.n...@gmail.com> wrote: > You're trying to use qemu features in libvirt xml, you cannot do that > except through command line. > What you can do quickly is creating a little bash script to replace your > qemu executable and use it for libvirt > > $ cat qemu-kvm-hv-vendor > #!/bin/sh > exec PATHTOYOURQEMUKVM \ > `echo "\$@" | sed 's|hv_time|hv_time,hv_vendor_id=KeenlyKVM|g'` > > $ chmod 755 qemu-kvm-hv-vendor > > $ virsh edit YOURVM > > Replace <emulator>PATHTOYOURQEMUKVM</emulator> with PATHTO/qemu-kvm-hv- > vendor > > For more features you can replace it with this : " > *hv_time,hv_relaxed,hv_spinlocks=0x1fff,hv_vpindex,hv_reset,hv_runtime,hv_crash,hv_vendor_id=freyja"* > > *credit to alex and okky* > > 2016-05-08 23:08 GMT+02:00 thibaut noah <thibaut.n...@gmail.com>: > >> Install qemu-git from the aur and you would have the patches with ti. >> >> You're talking about degraded performances, could you be more specific? >> I personnaly have hyper-v features and i don't see any difference >> whatsoever. >> Did you remember to modify your kernel config? >> >> 2016-05-08 22:49 GMT+02:00 Alex Williamson <alex.l.william...@gmail.com>: >> >>> On Sun, May 8, 2016 at 2:30 PM, Spam House <kthxplz...@gmail.com> wrote: >>> >>>> Hey All, >>>> >>>> Could anyone give me a quick summary of how to apply this ( >>>> http://www.spinics.net/lists/kvm/msg121742.html) patch to Qemu on Arch >>>> Linux. >>>> >>>> I've cloned the Qemu git and have tried various ways of parsing the >>>> info in the link into other files and using 'ed' to try and append/update >>>> the files with no success. >>>> >>>> Example: >>>> git clone qemu >>>> cd qemu/target-i386 >>>> nano cpu-qom.b (insert diff changes and save add 'w' at the very end) >>>> ed - cpu-qom.h < cpu-qom.b >>>> >>>> ed returns ? and deletes/blanks out cpu-qom.h >>>> >>>> Complete noob any help appreciated! >>>> >>>> I do have a windows10 vm with my 980ti passthrough running >>>> successfully. The performance has degraded since switching from Unraid to >>>> Arch and the only difference I can find is HyperV related. It seems this is >>>> the last hurtle. >>>> >>> >>> This has been in QEMU since the 2.5 release, if you're cloning qemu.git, >>> the change is already there. Surely Arch has QEMU builds including it as >>> well. >>> >>> _______________________________________________ >>> vfio-users mailing list >>> vfio-users@redhat.com >>> https://www.redhat.com/mailman/listinfo/vfio-users >>> >>> >> >
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