I'm not sure if you're already aware and have concerns with it, but Xen offers several levels, ranging from full HVM to PV: http://www.brendangregg.com/blog/20

I'm not sure if you're already aware and have concerns with it, but Xen offers several levels, ranging from full HVM to PV: http://www.brendangregg.com/blog/2014-05-07/what-color-is-your-xen.html http://www.brendangregg.com/blog/2014-05-07/what-color-is-yo...