Bug 865505

Summary: RFE: CPU definition should add ',+x2apic' regardless of the CPU model that the VM is using
Product: Red Hat OpenStack Reporter: Yaniv Kaul <ykaul>
Component: openstack-novaAssignee: Daniel Berrange <berrange>
Status: CLOSED WONTFIX QA Contact: yeylon <yeylon>
Severity: medium Docs Contact:
Priority: medium    
Version: 1.0 (Essex)CC: apevec, berrange, bsettle, markmc, rbalakri, sgordon, srevivo
Target Milestone: gaKeywords: FutureFeature
Target Release: 10.0 (Newton)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-04-08 15:55:24 EDT Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 870484, 956468, 1059007    
Bug Blocks:    

Description Yaniv Kaul 2012-10-11 11:39:19 EDT
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.
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Actual results:


Expected results:


Additional info:
http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaat%2Fliaatbpkvmasynchio.htm
Comment 3 Daniel Berrange 2012-12-17 10:52:32 EST
This isn't possible until this bug is addressed:

https://bugzilla.redhat.com/show_bug.cgi?id=870484