[libvirt-users] Disk and Network Statistics for a Specific Interval

Hi, virDomainInterfaceStats - This function returns network interface stats for interfaces attached to the domain. virDomainBlockStats- This function returns block device (disk) stats for block devices attached to the domain. Based on which time interval these function returns values. Is it cumulative from the vms uptime..? OR average ...? How can I get the average statistics of Disk and Network for a specific time interval say time x to time y ..? Regards -Sijo