Bug 1271852

Summary: [RFE][nova]: Huge Pages per guest NUMA nodes
Product: Red Hat OpenStack Reporter: Stephen Gordon <sgordon>
Component: openstack-novaAssignee: Sahid Ferdjaoui <sferdjao>
Status: CLOSED WONTFIX QA Contact: nlevinki <nlevinki>
Severity: unspecified Docs Contact:
Priority: high    
Version: 7.0 (Kilo)CC: berrange, dasmith, eglynn, kchamart, owalsh, pagupta, pbrady, sbauza, sferdjao, sgordon, srevivo, vromanso
Target Milestone: gaKeywords: FutureFeature, Reopened, Triaged
Target Release: 11.0 (Ocata)   
Hardware: Unspecified   
OS: Unspecified   
URL: https://blueprints.launchpad.net/nova/+spec/virt-hugepages-per-guest-numa-nodes
Whiteboard: upstream_milestone_next upstream_definition_pending-approval upstream_status_unknown
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-09-23 12:12:33 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1341176, 1414580    

Description Stephen Gordon 2015-10-14 21:33:37 UTC
Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/virt-hugepages-per-guest-numa-nodes.

Description:

The current huge Pages implementation build on top of NUMA takes advantage of memory placement to specify an amount of memory used on each NUMA nodes of guest.

This blueprint aim to improve that placement to make possible configuring different pagesize per guest NUMA nodes.

NUMA topologu will be enhanced with new attribute hw:numa_pagesize.N with N as an identify of guest NUMA node.

  hw:numa_pagesize.0 = large
  hw:numa_pagesize.1 = any

For a topology with several NUMA nodes it will be possible to set only page size of the desired node. Nodes without a specific page size will be considered to use default and smallest page size.

  hw:numa_nodes=2
  hw:numa_pagesize.1=large

This example means that a guest will be configured with topology of 2 NUMA nodes and node identified 1 will have memory page size backed to large.
  

  

Specification URL (additional information):

None

Comment 11 Sahid Ferdjaoui 2016-09-28 15:02:07 UTC
Added the nova spec as reference.