"top" shows different CPU usage than "ps faux"

redhatter redhatter at m-plify.net
Mon Feb 6 07:16:14 EST 2012


I just noticed that "top" shows a CPU usage percentage markedly 
different than "ps faux" for example.

In this case, a java process running at 433% in "ps faux" is shown as 
runnging at 661.4% in "top"

Both programs get their data from the /proc filesystem I imagine, so 
there could be a summation bug in either of them.

Or is there some rational explanation?

Best reagrds,

-- David

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