Intel Core i7 Virtualization Performance
Written by Michael Larabel in Processors on 22 April 2009. Page 6 of 6. 24 Comments

The 4GB read performance between KVM and VirtualBox were similar, but still noticeably slower than the native test.

Ending out our testing, the KVM hypervisor had the worst performance when it came to the Intel IOMeter File Server Access Pattern option through the Flexible IO Tester. Sun xVM VirtualBox was twice as slow as the host, but KVM was five times slower than the host.

Linux's Kernel-based Virtual Machine performed quite well in a number of tests when compared to the host OS speed and VirtualBox, but particularly when it came to the disk-related tests KVM did not fair well at all. As you can see from the graphs though, VirtualBox though also had a few areas where its performance was lackluster.

Share your virtualization benchmarks from the Phoronix Test Suite on Phoronix Global and be sure to discuss your findings in the Phoronix Forums.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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