Awkward Linux Power Management With Xen
Phoronix: Awkward Linux Power Management With Xen
If you happen to be running a Linux system with Xen support enabled, beware there may be odd behavior with the Linux kernel's power management -- it can easily move in either direction.
xen.org re-run of the Phoronix benchmark
Here's a re-run of the Phoronix Xen vs. KVM vs. VirtualBox benchmarks, with the missing Xen dom0 ACPI cpufreq patches added to the dom0 kernel: http://blog.xen.org/index.php/2011/1...-vs-kvm-redux/
The performance numbers are very different there. Please take a look.
The same patches also make it possible to use the lower CPU power states, to use less power and enable power saving. So it would be interesting to re-run this power usage benchmark with the Xen dom0 acpi cpufreq patches added to the dom0 kernel.