me (me.delete@this.me.com) on October 15, 2021 6:34 pm wrote:
> (Didn't read the whole thread)
>
> > For e.g. Intel where you have some servers in a VM cluster
> > that support AVX512 and some that don't, for instance,
> > the software either has to claim the vCPUs don't support
> > AVX512 on hardware that does, or limit migration of
> > code using that to the subset of servers that support AVX512.
> > And since Intel doesn't write the hypervisors,
> > third parties like Microsoft and VMware are left to choose their own path between those options.
>
> I think you are overthinking it. It's not that complicated to keep VMs on similar machines.
> Just shut them down for a brief moment when you want to move them over.
>
> Perhaps the better question is: Will Intel sell Alder Lake Xeon-E with the Atom cores still enabled?


I was talking about live migration. Obviously things are much easier when you are able to shut down a VM, but that's not always possible or stuff like vMotion wouldn't have been created.

You can designate which servers a particular VM is eligible to move to, but you'd have to know in advance that VM may use AVX512 to take that into account.