[Xen-users] DomU `top` statistics anomolies

[Jason Stubbs <jstubbs@xxxxxxxxxxxxx>]

Hi,

Apologies if this is answered somewhere. I couldn't find anything on the 
wiki or on the list for the past three months.
I'm getting strange CPU utilization statistics from top running within a 
DomU. I'm running xen snapshot 8885, linux 2.6.16_rc3 and procps-3.2.5. 
Dom0's statistics don't show any abnormalities.

Here's a cutdown version of what `xm top` shows for the test domain.

   NAME  STATE CPU(sec) CPU(%) VCPUS
testdom --b---       23    0.4 ãã 1


And here's what top running within the test domain shows.

load average: 0.00, 0.04, 0.01
Cpu0 : 2.6% us, 3.2% sy, 93.4% id, 0.9% wa


`xm top` usage statistics, top's load average and top's individual 
process statistics all appear to be correct. Only the Cpu0 line shown by 
top seems to be incorrect. Watching it, it appears to be continuously 
converging on the correct values (during the course of writing this it 
has dropped down to 0.9% us, 1.2% sy, 97.5% id, 0.4% wa) rather than an 
average over the refresh interval.
Is this expected/normal behaviour?

--
Jason Stubbs

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