Tasks may be scheduled on more than one processor to allow the processors to operate at lower processor frequencies and processor supply voltages. Multiple processors executing tasks in parallel at lower frequencies and supply voltages may allow completion of the tasks by deadlines at lower power consumption than a single processor executing all tasks at high frequencies and supply voltages. Power efficiency of a computer system may be improved by using a combination of processors executing tasks using a combination of earliest deadline first (EDF), earliest deadline last (EDL), and round robin (RR) queue management methods.