[Xen-users] User-time vs system-time in DomU

["Lamia M.Youseff" <lyouseff@xxxxxxxxxxx>]

Dear list,
I have a question about Xen performance that I did not find answered 
anywhere. I am using /usr/bin/time tool to track the performance of my 
application, which reports on user time, sys time, real time as well as 
CPU %.
I noticed that my application finishes in almost the same real time for 
DomU as in native kernel. However, I got almost double the user time, 
sys time and the cpu%.
It is important to me to understand why the time is doubled. What does 
user time, Real time and sys time refer to in DomU?
Thank you for your reply in advance,
Lamia Youseff

Xen3-2.6.12
55.07usr 3.03sys 2:07.94real 45%CPU

Linux-2.6.12
37.30usr 1.30sys 2:06.95real 30%CPU


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