Xen PVHVM Expands Its Performance Lead Over Xen PV Virtualization
Written by Michael Larabel in Virtualization on 24 January 2016 at 10:15 AM EST. 1 Comment
It's been about two years since last seeing any Xen PV vs. PVHVM benchmarks, but back then Xen PVHVM was smacking Xen PV's performance. Since then, with newly-published benchmarks, the lead has only expanded.

As a quick refresher, PVHVM is the Hardware Assisted Virtualization for Xen that's supported in conjunction with specialized drivers that are common to most modern Linux distributions and is an alternative to Xen's classic PV (para-virtualized) configuration. If you are unfamiliar, you can read more via the Xen Wiki.

The Xen Orchestra crew ran some fresh benchmarks to succeed the numbers they put out two years ago. As with their previous results, they utilized the Phoronix Test Suite for this fresh round of Xen PV vs. PVHVM benchmarking.

Their results show PVHVM now winning by a larger gap than previously with the newer hardware having more virtualization instructions with less overhead compared to older hardware. In worst case scenario, the PVHVM performance matches PV but in best case was around 40% faster on their Core i5 Haswell hardware. More details via this Xen Orchestra blog post.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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