[vfio-users] cpu core pinning with multiple cpus

[Alex Williamson]

On Wed, Sep 30, 2015 at 11:21 AM, Erik Adler <erik.adler at gmail.com> wrote:

> Thx Alex for looking into this. Tera is huge. No small effort there.
> Unfortunately you are probably right about the time source. Generally
> I don't play online games but you can bet I'll (and half the Internet)
> be playing Star Citizen when it comes out. Just surpassed $90 million
> in crowd founding 0.o. In the long run something needs to be done this
> time issue.
>
> Is it possible to install an “enlightened” time source into Windows?
> Sort of like virtio? Nvidea says it is “just a bug” so they should not
> mind...even if it is ie polymorphic ;)
>
> Any recommendations on what I can do in the mean time with my GTX970 ?


http://www.spinics.net/lists/kvm/msg121742.html

Obviously there's no libvirt support for this since I just posted the QEMU
patch, but if you put this in your xml, it should work with hyperv paravirt
features enabled (building a new QEMU with the above patch is obviously
required):

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
...
  <qemu:commandline>
    <qemu:arg value='-cpu'/>
    <qemu:arg
value='host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off,hv_vendor_id='/>
  </qemu:commandline>
</domain>
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