[fedora-virt] intel vt versus amd-v?
Richard W.M. Jones
rjones at redhat.com
Fri Jun 5 17:47:55 UTC 2009
On Fri, Jun 05, 2009 at 11:57:14AM -0400, Robert P. J. Day wrote:
> a friend wants to buy a server (probably dell) with HW virt support,
> and is wondering if there are any current clear advantages of intel
> over amd. the only observation i had time to make was that, if one
> checks out entry-level servers from dell (ballpark $1000 cdn), the amd
> opteron systems appear to be somewhat less expensive than equivalent
> intel-based systems.
>
> further thoughts?
The more recent Intel and AMD parts have extra virtualization features
which make virtualization more efficient -- primarily Intel Extended
Page Tables (EPT) and AMD Nested Page Tables (NPT). So your friend
should look at the chips which support that, basically Intel Nehalem
and the quad-core AMD Opterons (previously known as Barcelona).
If he wants to assign devices directly to guests, maybe look at Intel VT-d
/ AMD IOMMU. Not used it myself.
Rich.
--
Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones
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