The recent emails from rgb and Doug lead me to a question. Has anyone tested codes running under a VM versus running them "natively" on the hardware (native isn't a good word and I hope everyone gets my meaning)? The last word I heard is that performance takes a substantial hit if you are running a code in a VM. Some of the reasons are that the code has only virtualized access to the hardware (particularly the NICs) and memory management is a bit more difficult (although Barcelona with nested page tables should help there). I do remember VirtualIron saying that they had IB drivers so that the VM had direct access to the hardware.
Thanks! Jeff _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
