Re: [libvirt-users] data monitored by "virDomainBlockStats" API not consistent with ones reading from /proc/[pid]/io, and corrugated with /proc/diskstats
On 06/24/2014 02:24 AM, coperd wrote:
It is supposed that the VM’s disk “rd_bytes" and “wr_bytes" should
never
exceed the value of the physical disk respectively, right ?
That's a question for the qemu folks.
Doesn’t
libvirt virDomainBlockStats read disk information from “proc” ?
No, libvirt reads it from the qemu QMP command query-blockstats. Beyond
that, you'll have to investigate how qemu comes up with that number.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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