[libvirt] vcpuinfo returns wrong CPU value for kvm
vcpuinfo returns a wrong value for kvm with libvirt 0.6.2:
virsh # nodeinfo
CPU-Modell: x86_64
CPU(s): 2
CPU-Frequenz: 2333 MHz
CPU-Socket(s): 1
Kern(e) pro Socket: 2
Thread(s) pro Kern: 1
NUMA-Zelle(n): 1
Speichergrösse: 3062956 kB
virsh # dominfo rr019v3
Id: 2
Name: rr019v3
UUID: ff1ba599-5801-fca9-ab33-8962c2dfa46c
OS Typ: hvm
Status: laufend
CPU(s): 2
CPU-Zeit: 46,5s
Max Speicher: 1572864 kB
Verwendeter Speicher: 1572864 kB
Automatischer Start: deaktiviert
As default a kvm-vm has a affinity on all cpus provided by the node
virsh # vcpuinfo rr019v3
VCPU: 0
CPU: 0
Status: laufend
CPU-Affinität: yy
VCPU: 1
CPU: 0
Status: laufend
CPU-Affinität: yy
When i set the affinity of the vCPUs to dedicated CPUs of the node
vcpuinfo returns CPU 0 as the assigned CPU.
virsh # vcpupin rr019v3 0 0
virsh # vcpupin rr019v3 1 1
virsh # vcpuinfo rr019v3
VCPU: 0
CPU: 0
Status: laufend
CPU-Affinität: y-
VCPU: 1
CPU: 0
Status: laufend
CPU-Affinität: -y
Furthermore even when pinning all - in my case both - vCPUs of the
domain to the second CPU of the node virsh reports the first cpu as the
assigned cpu.
virsh # vcpupin rr019v3 0 1
virsh # vcpuinfo rr019v3
VCPU: 0
CPU: 0
Status: laufend
CPU-Affinität: -y
VCPU: 1
CPU: 0
Status: laufend
CPU-Affinität: -y
Watching at the code in virsh.c i am a little bit on my wits end where
virVcpuInfoPtr is defined as i am no c-programmer - only some java on my
side.
On my xen-machine with libvirt 0.3.3 the CPU is shown correctly though:
virsh vcpuinfo rr010v2
VCPU: 0
CPU: 0
Status: blockiert
CPU-Zeit: 550,4s
CPU-Affinität: y---
VCPU: 1
CPU: 1
Status: blockiert
CPU-Zeit: 27,9s
CPU-Affinität: -y--
VCPU: 2
CPU: 2
Status: blockiert
CPU-Zeit: 31,2s
CPU-Affinität: --y-
VCPU: 3
CPU: 3
Status: blockiert
CPU-Zeit: 49,1s
CPU-Affinität: ---y
Is this only working with the xen-driver?