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#!/usr/bin/env python3
# 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
from xml.dom import minidom
try:
conn = libvirt.openReadOnly(None)
except libvirt.libvirtError:
print('Failed to connect to the hypervisor')
exit(1)
try:
capsXML = conn.getCapabilities()
except libvirt.libvirtError:
print('Failed to request capabilities')
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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