with_new_caps.py

#!/usr/bin/python
import libvirt
from xml.dom import minidom

#c = libvirt.open("qemu:///system")
#caps = minidom.parseString(c.getCapabilities())
caps = minidom.parse("capabilities.xml")

host = caps.getElementsByTagName('host')[0]
cells = host.getElementsByTagName('cells')[0]
total_cpus = cells.getElementsByTagName('cpu').length

socketIds = []
siblingsIds = []

for proc in cells.getElementsByTagName('cpu'):
    soc_id = proc.getAttribute('socket_id')
    sib_id = proc.getAttribute('siblings')

    socketIds.extend(soc_id)
    siblingsIds.extend([sib_id])

print "Sockets:",len(set(socketIds))
print "Cores:",len(set(siblingsIds))
print "Threads:",total_cpus