Tracy R Reed wrote:
vmware does it using "full software virtualization" as opposed to full
hardware virtualization (with vmx or svm cpu flags) or
paravirtualization. vmware does its full software virtualization by
trapping and then emulating all of the necessary instructions. This
trap/emulate is a lot of extra cpu cycles which is why vmware is so slow
and paravirtualized xen (with the help of the OS kernel) so much faster.
Defend that statement with some stats, please.
I've seen claims both ways but very little hard data. VMWare can do
some very clever stuff that avoids kernel trips/page faults altogether.
They claim that for many types of workloads, this is faster than
hardware virtualization. I presume Xen makes the reverse claims. ;)
-a
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