Bug 726397

Summary:	glibtop_get_sysinfo() reports the wrong number of CPUs
Product:	Red Hat Enterprise Linux 6	Reporter:	Cosimo Cecchi <ccecchi>
Component:	libgtop2	Assignee:	David King <dking>
Status:	CLOSED DUPLICATE	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.2	CC:	bruno.cornec, mclasen, vbenes
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-02-13 10:08:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Cosimo Cecchi 2011-07-28 13:45:59 UTC

Description of problem:

glibtop_get_sysinfo() reports the wrong number of CPUs.
On a test machine which has 8x Intel Xeon E7-8870 physical CPUs, each one of them with 10 cores and 20 threads, the ncpus field of the returned glibtop_sysinfo structure is set to 20, which does not reflect either the physical CPUs (8), nor the actual available cores (160).

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

libgtop2-2.28.0-3.el6

How reproducible:

Always.

Comment 3 Suzanne Logcher 2012-02-14 23:11:55 UTC

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
representative.

Comment 6 Bruno Cornec 2015-02-13 04:44:21 UTC

In order to solve that issue I did the following in the SPEC file before launching make:

perl -pi -e 's/char buffer \[BUFSIZ\]/char buffer [10*BUFSIZ]/' sysdeps/linux/cpu.c
perl -pi -e 's/char buffer \[BUFSIZ\]/char buffer [10*BUFSIZ]/' sysdeps/linux/open.c
perl -pi -e 's/char buffer \[16384\]/char buffer [40*16384]/' sysdeps/linux/sysinfo.c
perl -pi -e 's/#define GLIBTOP_NCPU\s*256/#define GLIBTOP_NCPU  512/' ./include/glibtop/cpu.h

Also linked to upstream issue: https://bugzilla.gnome.org/show_bug.cgi?id=323354

That build modification has been tested successfully on a 480 threads system.

Comment 7 Bruno Cornec 2015-02-13 04:47:31 UTC

Also in link with:
https://bugzilla.redhat.com/show_bug.cgi?id=1013848
https://bugzilla.redhat.com/show_bug.cgi?id=1082123

Comment 8 David King 2015-02-13 10:08:57 UTC

A more complete fix is required, which includes bumping the soversion of the library. Additionally, several reverse dependencies will need to be rebuilt (such as gnome-system-monitor and gnome-applets). This is roughly what was done for RHEL 7 in bug 1082123.

This bug report seems to completely overlap with 1013848 (for RHEL 6), which explains that the packages which need to be rebuilt are not on the list of packages to get updated for RHEL 6.7. Closing this bug as a duplicate of the newer bug, as it has more information.

*** This bug has been marked as a duplicate of bug 1013848 ***