Hi,
We ran a few experiments to compare performance of VMware's
paravirtualization technique (VMI) and hardware MMU technologies (HWMMU)
on VMware's hypervisor.
To give some background, VMI is VMware's paravirtualization
specification which tries to optimize CPU and MMU operations of the
guest operating system. For more information take a look at this
http://www.vmware.com/interfaces/paravirtualization.html
In most of the benchmarks, EPT/NPT (hwmmu) technologies are at par or
provide better performance compared to VMI.
The experiments included comparing performance across various micro and
real world like benchmarks.