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[OpenStack Infra <1156456@xxxxxxxxxxxxxxxxxx>]

Fix proposed to branch: master
Review: https://review.openstack.org/223869

** Changed in: nova
       Status: Invalid => In Progress

** Changed in: nova
     Assignee: (unassigned) => Nicolas Simonds (nicolas.simonds)

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https://bugs.launchpad.net/bugs/1156456

Title:
  libvirt CPU info doesn't count NUMA cells

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  The libvirt driver, when counting sockets/cores/etc., does not take
  NUMA architectures into account.  This can cause applications using
  data from the Nova API to under-report the total number of
  sockets/cores/etc. on compute nodes with more than one NUMA cell.

  Example, on a production system with 2 NUMA cells:

  $ grep ^proc /proc/cpuinfo | wc -l
    32

  $ python simple_test_script_to_ask_nova_for_cpu_topology.py
  {u'cores': u'8', u'threads': u'2', u'sockets': u'1'}

  So, if one were relying solely on Nova to obtain information about
  this system's capabilities, the results would inaccurate results.

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