hi,all
      I am using virDomainInterfaceStats to monitor the network flow of VM. But there is some strange things.
      the description of vnet in xml is:
     
      <interface type='bridge'>
      <mac address='00:16:3e:5d:aa:a8'/>
      <source bridge='br0'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
      </interface>

      but when I call virDomainInterfaceStats to get network flow from vnet0, I get some wrong data:

      rx: 139972719907412      tx:7311107385599290! 735
      after 2 seconds, I call it again and I get:
      rx: 31                                tx:7311107385599290735
      another 2 seconds: 
      rx:155                               tx:7311107385599290735
      and...
      rx:110                               tx:7311107385599290735

      (rx:receive, tx:transmit)
!     
     &nb! sp; what do these data mean? Why there is no difference in tx at all? And why the difference in rx is so weird?
       Many thanks!

regards
       zhangzhang