Something's taking up CPU time

[Pierre Abbat]

I run top and it says that 55% of the processor time is in user processes and 
45% is in system. But the process percentages add up to only 2%, usually just 
xulrunner-bin (i.e. Firefox). How do I find what else is taking up time? I 
killed the process that had the most accumulated time, which was a Konqueror 
window showing on the laptop, but it's still busy.

Pierre
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