QEMU Virtual CPU version

[Daniel P. Berrange]

On Wed, Dec 19, 2012 at 03:51:52PM +0000, Nux! wrote:
> On 19.12.2012 15:48, Daniel P. Berrange wrote:
> >On Wed, Dec 19, 2012 at 03:43:37PM +0000, Nux! wrote:
> >You really don't want to change the OpenStack config unless
> >you actually want worse performance for your guests.
> >
> >Daniel
> 
> Oh, thanks Daniel! I thought the performance would be the same, just
> with a different cpu name.

The CPU name is a shorthand for specifying CPU feature flags, which
in turns controls what CPU features guests can use. For example,
if your CPU has support for AES hardware encryption, you want to
be exposing this to your guests, otherwise they'll fallback to
slower software AES encryption

Daniel
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