How much time a day my CPU is used by 100%? [closed]

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http://serverfault.com – Well, I like to measure the time my cpu is used by 100% (+/- a margin). In other words: I want to know how much time a day my CPU is the bottleneck and I am sitting here waiting for results. I want a faster computer and our admin says we are not even using our current cpu but I think it is a significant time a day I spend waiting for my CPU. So what tools exist and which do you recommend? (HowTos)