[fedora-virt] intel vt versus amd-v?

Robert P. J. Day rpjday at crashcourse.ca
Fri Jun 5 20:21:00 UTC 2009

On Fri, 5 Jun 2009, Richard W.M. Jones wrote:

> 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).

  NPT is what AMD is now calling "Rapid Virtualization Indexing", yes?


Robert P. J. Day                               Waterloo, Ontario, CANADA

        Linux Consulting, Training and Annoying Kernel Pedantry.

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