[CentOS-virt] performance differences between kvm/xen
jfranz at freerun.com
Tue Oct 19 07:16:28 EDT 2010
On 10/19/2010 03:47 AM, Dennis Jacobfeuerborn wrote:
> On 10/19/2010 09:41 AM, Pasi Kärkkäinen wrote:
>> It's because of the x86_64 architecture, afaik.
>> There was some good technical explananation about it,
>> but I can't remember the url now.
> In that case I'll have to call this advice extremely bogus and you probably
> should refrain from passing it on. The only way I can see this being true
> is some weird corner case.
There appear to be some interactions with the Intel VT-d processor features.
If I understand that paper correctly, HVM+VT-d outperforms PV by quite a
lot (if you have VT-d support on your system).
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