1. An apparatus in a symmetric multiprocessor server for dynamically managing power in a microprocessor chip included in the symmetric multiprocessor server, the microprocessor chip including a plurality of hardware elements, the plurality of hardware elements including a plurality of physical processing cores, the apparatus comprising: a virtual processor to be dispatched; ones of the plurality of hardware elements to which to dispatch the virtual processor, the ones of the plurality of hardware elements being used to execute the virtual processor being dispatched, the ones of the plurality of hardware elements including one of the plurality of physical processing cores; and means for powering-on the ones of the plurality of hardware elements from a powered-off, non-idled state while the virtual processor is dispatched.