Red Hat Bugzilla – Bug 296471
top man page does not adequately describe cpu status line(s)
Last modified: 2008-07-14 03:34:37 EDT
Description of problem:
I read the top man page in the hope of finding more about the meaning of the
entries in the cpu status line in the summary area. For example,
Cpu(s): 2.0%us, 1.0%sy, 0.0%ni, 96.4%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st
But 'man top' does not reveal what these entries stand for or what they mean.
Also, searching the net reveals cpu lines like
CPU states: 5.1% user 1.1% system 0.0% nice 0.0% iowait 93.6% idle
Either these are older versions of top with less entries in the CPU lines and so
more space to show the whole word, or there is an undocumented switch for
Version-Release number of selected component (if applicable): 3.2.7-12.fc6
Steps to Reproduce:
1. man top
1. A more verbose explanation of the two-letter entries in the cpu line of the
2. Either a discussion of what these entries mean or a pointer to relevant
These values are taken from /proc/stat. There were originally only four of them
on kernel 2.4, now there are eight, therefore the mysterious acronymes that
indeed should be explained somewhere, especially when "man proc" gives an
FYI: the columns are times spent in:
low priority user mode (nice)
hard irq (time servicing irqs)
soft irq (time servicing soft irqs)
steal (time given to other DomU instances (virtual machines))
I'll try to put it into the manpage somewhere.
Changed version to rawhide (FC6 is EOLed).
Seems this bug still exists in fedora 8.