On 12/07/2011 08:40 PM, Lai Jiangshan wrote: > "virt-top -1" can call virDomainGetPcpusUsage() periodically and get > the CPU activities per CPU. (still require virt-top site patch). > > virsh is also added a pcpuinfo command which calls virDomainGetPcpusUsage(), > it gets information about the physic CPUs, such as the usage of > CPUs, the current attached vCPUs.
Meta-question - is this the time taken _by just the guest in question_ on the host's physical CPU, or is it the cumulative CPU time taken by all process on the physical CPU, in which case this would be better named as virNodeGetCpusUsage()? And if it is per-domain, then what's the difference between physical cpu usage and virtual cpu usage (that is, can we even tell the overhead of the hypervisor, and should we be exposing that overhead to the user)? -- Eric Blake [email protected] +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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