Red Hat Bugzilla – Bug 127702
procps: top Reports CPU Utilization above 100%
Last modified: 2007-11-30 17:10:46 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7)
Description of problem:
When using top to monitor a system under heavy load (in my case, a
system undergoing stress testing), top will occasionally display an
idle value of 3624114749255314.0% or similar. See the enclosed
screenshot for details.
2 x 2.4 GHz Xeon CPUs with Hyperthreading enabled
1 GB RAM
Kernel 2.4.22-1.2194.nptl (SMP)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Force your system to use all CPU time, and monitor the system with
top. Within the first minute you should see the odd reading.
Created attachment 101821 [details]
Top showing the problem.
Does procps-3.2.2-1 still show this behaviour?
Where can I find a copy of procps-3.2.2-1 for FC1?
I compiled and installed procps-3.2.2-1 for FC1, and ran the same
stress tests as before. I wasn't able to reproduce the problem found
in the older version of top. It looks like this newer version of
procps fixes the bug in top.