Regulagem Dinâmica de Voltagem em Sistemas de Tempo Real

BRUNO A. NOVELLI; JULIUS .C.B. LEITE; JOSÉ M. URRIZA; JAVIER DARIO OROZCO

São Leopoldo, Brasil

Congreso; XXXII SEMISH 2005; 2005

Sociedad Brasilera de Computacion

This paper presents methods for power saving in real-time systems,through dynamic voltage scaling. These methods, for rate monotonic schedulers,use slack stealing to slowdown the frequency of execution of the processor.An off-line phase calculates the smaller frequency that still guarantees all timingconstraints. An on-line phase takes into account the additional time producedby tasks that run for less than their worst-case execution time, and the slack leftin the first phase, to yet reduce the frequency of execution. Results obtained throughsimulation show the improvements obtained with the use of the proposedmethods.