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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