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[serlex <1726356@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hi,

CPU Pinning or NUMA doesn't seem to work with xen hypervisor:

I used the following guide: 
https://docs.openstack.org/nova/latest/contributor/testing/libvirt-numa.html. 

Xen version: 4.4.4
Nova 9.1.0
libvirt 1.2.14-12


After creating new instance

``` 
mysql> select numa_topology from compute_nodes; 
+---------------+ 
| numa_topology | 
+---------------+ 
| NULL          | 
| NULL          | 
+---------------+ 


$ sudo virsh dumpxml instance-00000009 
... 
<vcpu placement='static'>1</vcpu> 
...
No vcpupin written to the instance


But NUMA is available 

[root@ca-ostest459 ~]# virsh nodeinfo 
CPU model:           x86_64 
CPU(s):              32 
CPU frequency:       2593 MHz 
CPU socket(s):       1 
Core(s) per socket:  8 
Thread(s) per core:  2 
NUMA cell(s):        2 
Memory size:         134158412 KiB 

Regards

** Affects: nova
     Importance: Undecided
         Status: New

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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1726356

Title:
  NOVA/CPU Pinning not working with xen

Status in OpenStack Compute (nova):
  New

Bug description:
  Hi,

  CPU Pinning or NUMA doesn't seem to work with xen hypervisor:

  I used the following guide: 
  https://docs.openstack.org/nova/latest/contributor/testing/libvirt-numa.html. 

  Xen version: 4.4.4
  Nova 9.1.0
  libvirt 1.2.14-12

  
  After creating new instance

  ``` 
  mysql> select numa_topology from compute_nodes; 
  +---------------+ 
  | numa_topology | 
  +---------------+ 
  | NULL          | 
  | NULL          | 
  +---------------+ 

  
  $ sudo virsh dumpxml instance-00000009 
  ... 
  <vcpu placement='static'>1</vcpu> 
  ...
  No vcpupin written to the instance

  
  But NUMA is available 

  [root@ca-ostest459 ~]# virsh nodeinfo 
  CPU model:           x86_64 
  CPU(s):              32 
  CPU frequency:       2593 MHz 
  CPU socket(s):       1 
  Core(s) per socket:  8 
  Thread(s) per core:  2 
  NUMA cell(s):        2 
  Memory size:         134158412 KiB 

  Regards

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