Power and real-time requirements integrated with an adaptive resource reservation soft real-time scheduler

RODRIGO SANTOS; MARÍA BELÉN D'AMICO; JAVIER OROZCO; PEDRO DOÑATE; LEANDRO ORDINEZ; DAVID DONARI

Santiago de Cali

Conferencia; XXXI Conferencia Latinoamericana de Informática (CLEI 2005); 2005

CLEI

Recently, devices such as cellular phones, portable computers and digital agendas have experienced a great development. The commercial success of these products greatly depends on the battery life. Although batteries have improved considerably, microprocessors are more and more power-hungry. This paper presents a new alternative for controlling energy consumption in soft real-time applications. A resource reservation paradigm working under Earliest Deadline First scheduling is applied. The bandwidth reserved is determined by using an adaptive predictor and a feedback algorithm. This dynamical adjustment permits to scale the frequency and voltage of the processor, reducing the consumed energy. The usefulness of the proposed technique is illustrated via experimental results.