I tested psutils in Ubuntu 11.10 and it works properly.
$ python
Python 2.7.2+ (default, Oct 4 2011, 20:03:08)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
>>> psutil.cpu_percent()
10.0
>>> psutil.cpu_percent()
5.0
>>> psutil.cpu_percent()
10.0
>>> psutil.cpu_percent()
33.3
>>> psutil.cpu_percent()
60.0
>>> psutil.cpu_percent()
18.2
$ apt-cache policy python-psutil
python-psutil:
Installed: 0.2.1-1ubuntu1
Candidate: 0.2.1-1ubuntu1
Version table:
*** 0.2.1-1ubuntu1 0
500 http://it.archive.ubuntu.com/ubuntu/ oneiric/universe i386 Packages
100 /var/lib/dpkg/status
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https://bugs.launchpad.net/bugs/569827
Title:
psutil.cpu_percent() returns 0.0 although CPU Usage is higher
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