Bug 848728 - 3.1 - Allow VDSM to report logical cores/threads as physical cores.
3.1 - Allow VDSM to report logical cores/threads as physical cores.
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: vdsm (Show other bugs)
6.3
All Linux
unspecified Severity high
: beta
: ---
Assigned To: Dan Kenigsberg
Pavel Stehlik
infra
:
Depends On:
Blocks: 848729
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Reported: 2012-08-16 06:04 EDT by Lee Yarwood
Modified: 2012-12-04 14:07 EST (History)
11 users (show)

See Also:
Fixed In Version: vdsm-4.9.6-29.0
Doc Type: Bug Fix
Doc Text:
A previous change to VDSM caused the getVdsCaps call to only return the number of physical cores on a system. Now, VDSM allows configuration of the report_host_threads_as_cores option to specify what is returned by getVdsCaps. When the report_host_threads_as_cores option is left in its default "false" value, getVdsCaps reports the number of real host cores in cpuCores. When the value is changed to "true", getVdsCaps returns the total number of hyperthreads.
Story Points: ---
Clone Of:
: 848729 (view as bug list)
Environment:
Last Closed: 2012-12-04 14:07:33 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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Description Lee Yarwood 2012-08-16 06:04:38 EDT
Description of problem:
As a result of bz#781975 and http://gerrit.ovirt.org/1737 VDSM's getVdsCaps call only returns the number of physical cores on a system. We should provide a way for customers to force VDSM to return the total number of physical and logical cores/threads on the host.

Version-Release number of selected component (if applicable):
vdsm-4.9.6-28.0.el6_3

How reproducible:
Always

Steps to Reproduce:
1. vdsClient -s 0 getVdsCaps

  
Actual results:
getVdsCaps returns the number of physical cores on the host.

Expected results:
Given the correct config value getVdsCaps should be able to return both the total number of physical and logical cores/threads on a system.

Additional info:
http://gerrit.ovirt.org/#/c/7097/
Comment 4 Dan Kenigsberg 2012-08-16 08:21:53 EDT
when report_host_threads_as_cores is left in its default "false" value, the number of real host cores is to be reported in cpuCores. When the value is changed to "true", hyperthreads are counted instead.
Comment 9 errata-xmlrpc 2012-12-04 14:07:33 EST
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-1508.html

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