Power and Real Time Requirements Integrated with an Adaptive Resource Reservation Soft Real-Time Scheduler

SANTOS VALENTINUZZI, RODRIGO; BELÉN D'AMICO, MARIA; JAVIER OROZCO,; PEDRO DOÑATE,; LEONARDO ORDÍNEZ,; DAVID DONARI,

Cali

Congreso; Conferencia Latinoamericana de Estudios en informática; 2005

Centro Latinoamericano de Estudios en Informática

Recently, devices such as cellular phones, portable computersand digital agendas have experienced a great development. The commercialsuccess of these products greatly depends on the battery life. Althoughbatteries have improved considerably, microprocessors are more and morepower-hungry. This paper presents a new alternative for controlling energyconsumption in soft real-time applications. A resource reservation paradigmworking under Earliest Deadline First scheduling is applied. The bandwidthreserved is determined by using an adaptive predictor and afeedback algorithm.  This dynamical adjustment permits to scale the frequencyand voltage of the processor, reducing the consumed energy. The usefulnessof the proposed technique is illustrated via experimental results.