Re: [Xen-users] power savings xen vs kvm

[Steven Timm <timm@xxxxxxxx>]

It can depend on your hardware...is your hardware AMD or Intel based.
There were some versions of the Xen kernel in which we had to
disable all power-saving features of the AMD hardware to get it
to work at all.  In some of the latest Intel hardware it is not always
happy with KVM especially if you are trying to do migration and again
it works better there if all CPU's are pinned to the highest frequency.

Steve Timm


On Mon, 2 Feb 2015, jacek burghardt wrote:

> I wonder why power usage is so much higher with xen that is with kvm ?
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@xxxxxxxx  http://home.fnal.gov/~timm/
Office:  Wilson Hall room 804
Fermilab Scientific Computing Division,
Scientific Computing Facilities Quadrant.,
Experimental Computing Facilities Dept.,
Project Lead for Virtual Facility Project.



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