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#!/usr/bin/env python
# Parse topology information from the capabilities XML and use
# them to calculate host topology
#
# Authors:
# Amador Pahim <apahim@redhat.com>
# Peter Krempa <pkrempa@redhat.com>
import libvirt
import sys
from xml.dom import minidom
try:
conn = libvirt.openReadOnly(None)
except libvirt.libvirtError:
print 'Failed to connect to the hypervisor'
sys.exit(1)
try:
capsXML = conn.getCapabilities()
except libvirt.libvirtError:
print 'Failed to request capabilities'
sys.exit(1)
caps = minidom.parseString(capsXML)
host = caps.getElementsByTagName('host')[0]
cells = host.getElementsByTagName('cells')[0]
total_cpus = cells.getElementsByTagName('cpu').length
socketIds = []
siblingsIds = []
socketIds = [ proc.getAttribute('socket_id')
for proc in cells.getElementsByTagName('cpu')
if proc.getAttribute('socket_id') not in socketIds ]
siblingsIds = [ proc.getAttribute('siblings')
for proc in cells.getElementsByTagName('cpu')
if proc.getAttribute('siblings') not in siblingsIds ]
print "Host topology"
print "NUMA nodes:", cells.getAttribute('num')
print " Sockets:", len(set(socketIds))
print " Cores:", len(set(siblingsIds))
print " Threads:", total_cpus
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