Ubuntu 15.10: KVM vs. Xen vs. VirtualBox Virtualization Performance

KVM was edging past Xen and VirtualBox for the CompileBench test.

With the Parboil OpenMP CPU test, the performance of KVM and Xen effectively matched that of the host system with minimal overhead in having access to all 20 CPU threads and having no other tasks active on the host system during testing. While VirtualBox was configured with the same hardware access, it was much slower than KVM and Xen.

The Rodinia OpenMP test was also showing VirtualBox at a similar disadvantage.