Bug 865505 - RFE: CPU definition should add ',+x2apic' regardless of the CPU model that the VM is using
Summary: RFE: CPU definition should add ',+x2apic' regardless of the CPU model that th...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: openstack-nova
Version: 1.0 (Essex)
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ga
: 10.0 (Newton)
Assignee: Daniel Berrangé
QA Contact: yeylon@redhat.com
URL:
Whiteboard:
Depends On: 870484 956468 1059007
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-10-11 15:39 UTC by Yaniv Kaul
Modified: 2023-09-18 10:03 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-04-08 19:55:24 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker OSP-28812 0 None None None 2023-09-18 09:59:45 UTC

Description Yaniv Kaul 2012-10-11 15:39:19 UTC 
Description of problem:
x2apic can provide some performance benefit (IBM measured 2-5% in IO), and is emulated, so you can pass it anyway, regardless of the CPU the host has.
Therefore, CPU should be:
-cpu <cpu>,+x2apic

Version-Release number of selected component (if applicable):
Essex

How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaat%2Fliaatbpkvmasynchio.htm
Comment 3 Daniel Berrangé 2012-12-17 15:52:32 UTC 
This isn't possible until this bug is addressed:

https://bugzilla.redhat.com/show_bug.cgi?id=870484
Note You need to log in before you can comment on or make changes to this bug.