[libvirt-users] What's the precision of the domain cpu stats?
Hi, everyone
I'm using libvirt and resort to virDomainGetCPUStats for cpu
usage by one domain. In my system, Ubuntu-11.10 64bit with 2 cores and
Qemu Hyperviser, this function returns something like this:
virTypedParameter[0]
{
field: "cpu_time"
type: 4
value.ul 51640610899
}
virTypedParameter[1]
{
field: "cpu_time"
type: 4
value.ul 55302820304
}
This 51640610899 and 55302820304 kind of conflict the result
returned by "cat /proc/stat | grep cpu"
cpu 449224 6812 89433 4407261 50327 1 2443 0 13041 0
cpu0 224251 2603 43144 2195672 34682 0 2350 0 6692 0
cpu1 224972 4209 46289 2211589 15644 0 93 0 6349 0
I know the precision of /proc/stat is 1/HZ, so what's the precision
of CPU stats returned by virDomainGetCPUStats?