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Created attachment 1064025 [details]
Patch for RHEL 6 Gnome

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.

Similar bug was opened for RHEL 7.
This one contains the patch for the previous Gnome from RHEL 6

Reference on RHEL 7
https://bugzilla.redhat.com/show_bug.cgi?id=1254332

As the patch is already written, this is a very easy fix.

While testing a multi-core machine with gnome-system-monitor-2.28.0-13.el6, I was able to see the correct amount of cores listed, as well as the idle cores at 0.0%.

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-2017-0578.html