Managing Shared Resources in Power Aware Systems

SANTOS VALENTINUZZI, RODRIGO; GIUSEPPE LIPARI,; MICHAEL TRIMARCHI,

Fortaleza

Congreso; 7th Workshop de Tiempo Real; 2005

Sociedad Brasileña de Computacion

Mobile and portable computing devices based on microprocessors,cellular phones, portable digital agendas (PDA), etc. represent todayan important part in the consumer electronic market. The commercialsuccess of these products greatly depends on the duration of thebattery support. In order to consume minimal power during power-up,sleep, idle and underloaded conditions, many Dynamic Voltage Scaling(DVS) techniques have been proposed. In this paper, we propose atechnique based on the resource reservation paradigm. The paradigm isextended to cope with shared resources and critical sections. Thebandwidth reserved to each task is controlled by means of a predictorand a feedback algorithm. Taking into account the total utilizationfactor demand for the processor the frequency and voltage are scaledto keep the overall bandwidth close to 100%.