[CentOS] Power burn test

I need a program that will just run everything at max so I can measure 
the max power used on some systems.  My 'Kill a Watt' meter should show 
up early next week.

SO run that CPU at max, using all memory, and keeping the harddrive 
spinning.

I can jsut do pings on the lan card for it to stay awake.

I have searched here and on the net and have come back with nothing.