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Bug 1254332 - Unreliable cpu detection through glibtop
Summary: Unreliable cpu detection through glibtop
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: gnome-system-monitor
Version: 7.2
Hardware: All
OS: Linux
unspecified
low
Target Milestone: rc
: ---
Assignee: David King
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-08-17 18:09 UTC by Helio Chissini de Castro
Modified: 2019-07-11 09:49 UTC (History)
4 users (show)

Fixed In Version: gnome-system-monitor-3.14.1-3.el7
Doc Type: Bug Fix
Doc Text:
Cause: a CPU core is completely idle, which is considerably more likely to occur with many CPUs. Consequence: gnome-system-monitor reports an incorrect number of CPUs; it stops counting when it encounters one with zero load Fix: a patch was added to query the number of CPUs from the system directly Result: the correct number of CPUs are detected, regardless of CPU load on a particular CPU
Clone Of:
Environment:
Last Closed: 2015-11-19 07:34:13 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
GNOME Bugzilla 753731 0 None None None Never
Red Hat Product Errata RHBA-2015:2215 0 normal SHIPPED_LIVE gnome utilities bug fix and enhancement update 2015-11-19 08:26:52 UTC

Description Helio Chissini de Castro 2015-08-17 18:09:13 UTC 
glibtop not provides the number of cpus on the machine directly, relying on a list with the current load of each core.

Original code assume that a 0 load core is the end of cpu list, which is invalid in cases of machines with high number of cores, that happens to some cores stay idle with 0 load.

Since this can happens in any core number, if a machine has 192 cores, but the core number 5 has 0 load, then 4 cores will be wrongly reported.

Using standard sysconf api solves the issue in a simple way.

Reference:
https://bugzilla.gnome.org/show_bug.cgi?id=753731
Comment 8 errata-xmlrpc 2015-11-19 07:34:13 UTC 
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.

https://rhn.redhat.com/errata/RHBA-2015-2215.html
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