(OK) Phoronix Test Suite
http://www.phoronix-test-suite.com/
All of this Linux virtualization benchmarking was done via the open-source
Phoronix Test Suite software with
OpenBenchmarking.org. When the official release of Ubuntu 14.04 LTS nears in April, there will be more benchmarks on Phoronix along with other hypervisors like Xen.