maintainer-feedback requested: [Bug 220690] sysctl(8) value kern.cp_times is inconsistent with top(1)

[bugzilla-noreply at freebsd.org]

Yuri Victorovich <yuri at rawbw.com> has reassigned Bugzilla Automation
<bugzilla at FreeBSD.org>'s request for maintainer-feedback to xfce at FreeBSD.org:
Bug 220690: sysctl(8) value kern.cp_times is inconsistent with top(1)
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220690



--- Description ---
Created attachment 184310
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=184310&action=edit
cpu-consumption-kern.cp_times.sh

I have a process that uses 100% CPU, pinned to one CPU, according to top(1).
kern.cp_times, however, shows that CPU use frequently changes from one CPU to
another. No specific CPU appears to be in use consistently, according to
kern.cp_times.

Please see the attached program.

This program follows the algorithm used by xfce4 CPU use plugin
sysutils/xfce4-cpugraph-plugin, which also shows incorrect CPU use as a result.

kern.cp_times CPU use data appears to not match top(1), which seems to be
correct.