[Openstack-operators] libvirt cpu type per instance?

Chris Friesen chris.friesen at windriver.com
Thu Mar 3 21:29:00 UTC 2016


On 03/03/2016 03:20 PM, Kris G. Lindgren wrote:
> I would be curious if specifing the cpu type would actually restrict
> performance.  As far as I know, this only restricts the cpu features presented
> to a vm.  You can present a vm that has the cpu instruction sets of a Pentium 3
> – but runs and is as performant as a single core on a 2.8ghz hexcore cpu.

This is my understanding as well.  We're not simulating the performance of a CPU 
model, just the instruction set and exposed features.

Chris



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