[one-users] CPU issues with KVM

[Madhurranjan Mohaan]

Hi All,

I have the same issue as the other thread on overcommitment of CPU (
http://lists.opennebula.org/pipermail/users-opennebula.org/2011-May/005227.html)
.

I have an Intel Xeon server on which I am currently running open nebula over
kvm.

I went through how KVM takes care of CPU and saw my template file from which
I spawn VMs and that doesn't specify VCPUs. I have 2 questions :

1. Does VCPU value itself matter ? Because its 0 in all my VMs .  Htop on
the box shows high cpu usage on specific cores .

for i in `virsh list | grep running | cut -d " " -f3` ; do echo $i ,  `virsh
vcpuinfo $i`  ; done
one-27 , VCPU: 0 CPU: 15 State: running CPU time: 13579.7s CPU Affinity:
yyyyyyyyyyyyyyyy
one-37 , VCPU: 0 CPU: 11 State: running CPU time: 35643.0s CPU Affinity:
yyyyyyyyyyyyyyyy
one-41 , VCPU: 0 CPU: 8 State: running CPU time: 224883.1s CPU Affinity:
yyyyyyyyyyyyyyyy
one-50 , VCPU: 0 CPU: 15 State: running CPU time: 59100.8s CPU Affinity:
yyyyyyyyyyyyyyyy
one-51 , VCPU: 0 CPU: 14 State: running CPU time: 196545.6s CPU Affinity:
yyyyyyyyyyyyyyyy
one-52 , VCPU: 0 CPU: 13 State: running CPU time: 75126.3s CPU Affinity:
yyyyyyyyyyyyyyyy
one-53 , VCPU: 0 CPU: 1 State: running CPU time: 148284.6s CPU Affinity:
yyyyyyyyyyyyyyyy
one-54 , VCPU: 0 CPU: 4 State: running CPU time: 53316.7s CPU Affinity:
yyyyyyyyyyyyyyyy
one-56 , VCPU: 0 CPU: 13 State: running CPU time: 11596.5s CPU Affinity:
yyyyyyyyyyyyyyyy
one-57 , VCPU: 0 CPU: 6 State: running CPU time: 12659.4s CPU Affinity:
yyyyyyyyyyyyyyyy
one-68 , VCPU: 0 CPU: 13 State: running CPU time: 18008.8s CPU Affinity:
yyyyyyyyyyyyyyyy

2. When I actually have multiple cores in kvm, the link
http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/ch25s06.htmlshows
me that this will be displayed in the following manner. When I have an
equivalent VM with 2 dedicated CPUs ( CPU 2 in open nebula) , i don't see 2
cpus actually allocated to that VM  like below.:

# virsh vcpuinfo *guest1*
VCPU:           0
CPU:            3
State:          running
CPU time:       0.5s
CPU Affinity:   yyyyyyyy
VCPU:           1
CPU:            1
State:          running
CPU Affinity:   yyyyyyyy
VCPU:           2
CPU:            1
State:          running
CPU Affinity:   yyyyyyyy
VCPU:           3
CPU:            2
State:          running

Thoughts ?
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