From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-09-19T00:02:59+09:00
Subject: Re: CPU Usage not near 100% when running code

your cpu is smarter than you.
the people who design them are smarter than most.
it's like most things, you would be hard pressed to actually get 100%  
out of it, and if you did, it would probably be bad.
It probably reserves something for the system.
most likely a question for a systems engineer or you might look on  
the ars technica site.