Xen Power Usage
Xen Hypervisor power consumption quick comparison from Ubuntu Oneiric for Phoronix.com posting.


Ubuntu 11.10: 

	Processor: Intel Core i5-2520M @ 2.50GHz (4 Cores), Motherboard: HP 161C, Chipset: Intel 2nd Generation Core Family, Memory: 4096MB, Disk: 160GB INTEL SSDSA2M160, Graphics: Intel 2nd Generation Core Family IGP, Audio: IDT 92HD81B1X5, Network: Intel 82579LM Gigabit Connection + Intel Centrino Advanced-N 6205

	OS: Ubuntu 11.10, Kernel: 3.0.0-12-generic (x86_64), Desktop: Unity 4.22.0, Display Server: X Server 1.10.4, Display Driver: intel 2.15.901, Compiler: GCC 4.6.1, File-System: ext4, Screen Resolution: 1600x900

Ubuntu 11.10 - Xen: 

	Processor: Intel Core i5-2520M @ 2.50GHz (4 Cores), Motherboard: HP 161C, Chipset: Intel 2nd Generation Core Family, Memory: 2560MB, Disk: 160GB INTEL SSDSA2M160, Graphics: Intel 2nd Generation Core Family IGP, Audio: IDT 92HD81B1X5, Network: Intel 82579LM Gigabit Connection + Intel Centrino Advanced-N 6205

	OS: Ubuntu 11.10, Kernel: 3.0.0-12-generic (x86_64), Desktop: Unity 4.22.0, Display Server: X Server 1.10.4, Display Driver: intel 2.15.901, Compiler: GCC 4.6.1, File-System: ext4, Screen Resolution: 1600x900


Battery Power Usage
System Power Consumption Monitor
Milliwatts < Lower Is Better
Ubuntu 11.10 ....... MIN: 12079  AVG: 14205  MAX: 22632 
Ubuntu 11.10 - Xen . MIN: 13807  AVG: 15157  MAX: 18094 


OpenArena 0.8.5
System Power Consumption Monitor
Milliwatts < Lower Is Better
Ubuntu 11.10 ....... MIN: 17592  AVG: 25507  MAX: 27380 
Ubuntu 11.10 - Xen . MIN: 18094  AVG: 27299  MAX: 28412 


C-Ray 1.1
System Power Consumption Monitor
Milliwatts < Lower Is Better
Ubuntu 11.10 ....... MIN: 26102  AVG: 40290  MAX: 41294 
Ubuntu 11.10 - Xen . MIN: 28151  AVG: 31877  MAX: 32770 


Timed Idle
System Power Consumption Monitor
Milliwatts < Lower Is Better
Ubuntu 11.10 ....... MIN: 14064  AVG: 14565  MAX: 17886 
Ubuntu 11.10 - Xen . MIN: 15592  AVG: 15921  MAX: 19680 


C-Ray 1.1
Total Time
Seconds < Lower Is Better
Ubuntu 11.10 ....... 121.31 |====================================
Ubuntu 11.10 - Xen . 166.26 |==================================================


OpenArena 0.8.5
Resolution: 1600 x 900
Frames Per Second > Higher Is Better
Ubuntu 11.10 ....... 43.80 |===================================================
Ubuntu 11.10 - Xen . 41.03 |================================================


System Power Consumption Monitor
Phoronix Test Suite System Monitoring
Milliwatts
Ubuntu 11.10 ....... MIN: 12079  AVG: 27165  MAX: 41294 
Ubuntu 11.10 - Xen . MIN: 13807  AVG: 25962  MAX: 32770 


Battery Power Usage
Idle, DPMS Off, Video Playback
Milliwatts
Ubuntu 11.10 ....... MIN: 12079  AVG: 14249  MAX: 22632 
Ubuntu 11.10 - Xen . MIN: 13807  AVG: 15162  MAX: 18094