The invention is directed to a method for correlating processor usage to customer billing in an on-demand server with real-time allocation/deallocation of processing resources. A method in accordance with an embodiment of the present invention includes: providing a plurality of processors, each processor having thermal control circuit (TCC) logic; determining a processing requirement for the plurality of processors; and dynamically controlling a processing capability of the plurality of processors to provide the determined processing requirement by selectively enabling or disabling the TCC logic of each processor.