[libvirt] Can not get domain's cpu time
Daniel P. Berrange
berrange at redhat.com
Thu Jul 16 09:55:58 UTC 2009
On Thu, Jul 16, 2009 at 05:15:23PM +0800, Jason Wong wrote:
> Zhang Qian wrote:
> >Hi,
> >
> >I have a domain running in my KVM box, and try to get its vcpu info by
> >calling virDomainGetVcpus(), but it seems the cpu time returned to me
> >is always 0.
> >
> >And I also found virsh can not get the CPU time too:
> >$ virsh vcpuinfo aaa
> > VCPU: 0
> > CPU: 0
> > State: running
> > CPU Affinity: yy
> >
> >I tried the same virsh command in my Xen box for a running domain, the
> >output is:
> >$ virsh vcpuinfo test1
> > VCPU: 0
> > CPU: 1
> > State: running
> > CPU time: 322.1s <----- I need this
> > CPU Affinity: yy
> >
> >As you see, for KVM domain, there is no "CPU time".
> >But it's very strange that virt-manager can show the right CPU usage
> >for my running domain, I do not know where virt-manger gets it.
> >
> >Can anyone tell me which libvirt API should I call to get the CPU time?
> >Thanks!
> >
> >
> >Regards,
> >Qian
> >
> >--
> >Libvir-list mailing list
> >Libvir-list at redhat.com
> >https://www.redhat.com/mailman/listinfo/libvir-list
> >
> virDomainGetVcpus() is NOT supported by KVM
It is supported, but we don't fill in all the fields :-( Basically it
only gives youthe vCPU <-> pCPU affinity info at this time
>
> For driver support status, please refer to http://libvirt.org/hvsupport.html
That's actually out of date :-(
Daniel
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