yahoo-eng-team team mailing list archive

[Daniel Berrange <1386162@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When pinning a guest to a specific NUMA node, the Nova libvirt driver
does not pin the emulator threads to any host CPUs. This means that non-
vCPU related work done by QEMU is still free to float across any host
NUMA node.

The expected behaviour is that the emulator threads are pinned to the
union of host CPUs that all vCPUs are pinned to.

** Affects: nova
     Importance: Medium
     Assignee: Daniel Berrange (berrange)
         Status: In Progress

** Changed in: nova
     Assignee: (unassigned) => Daniel Berrange (berrange)

** Changed in: nova
   Importance: Undecided => Medium

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

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1386162

Title:
  Nova libvirt driver does not bind emulator threads to host CPUs

Status in OpenStack Compute (Nova):
  In Progress

Bug description:
  When pinning a guest to a specific NUMA node, the Nova libvirt driver
  does not pin the emulator threads to any host CPUs. This means that
  non-vCPU related work done by QEMU is still free to float across any
  host NUMA node.

  The expected behaviour is that the emulator threads are pinned to the
  union of host CPUs that all vCPUs are pinned to.

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1386162/+subscriptions