[Xen-users] Q: CPU usage in Dom0

["Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>]

Hi,

there's no vm config file form Dom0, right? So how does XEN assign virtual CPUs 
to 
real CPUs? I see this on a two Dual-Core Opteron machine:
# xm vcpu-list
Name                              ID  VCPU  CPU  State  Time(s)  CPU Affinity
Domain-0                           0     0    1   r--    2927.8  any cpu
Domain-0                           0     1    2   -b-    2551.1  any cpu
Domain-0                           0     2    0   -b-    2477.0  any cpu
Domain-0                           0     3    0   -b-    2231.4  any cpu

So VCPU 2 and 3 use the same CPU (0), even though there's another CPU (3). Why?

On another machine (same model) things look better:

# xm vcpu-list
Name                              ID  VCPU  CPU  State  Time(s)  CPU Affinity
Domain-0                           0     0    0   -b-     142.9  any cpu
Domain-0                           0     1    2   -b-      90.0  any cpu
Domain-0                           0     2    1   -b-      81.6  any cpu
Domain-0                           0     3    3   r--     134.6  any cpu

Regards,
Ulrich


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