Gerenciamento dinâmico de energia.

Abstract

Facing the technological advances that humanity has experienced in recent decades, which regard to equipments for information technology, studies are being conducted to reduce the energy consumption of these, through the adoption of policies to optimize energy consumption. The need to reduce energy consumption has stimulated studies that led to the emergence of numerous policies of power management. This work shows the Dynamic Power Management (DPM), the influences arising from the workload on the use of processors and some of the many techniques of dynamic power management. Thus there is initially a technique known as Dynamic Voltage Scaling (DVS), followed by Dynamic Voltage and Frequence Scaling (DVFS) and the Thread Motion. It is also discussed the hardware resources currently used in real processors such as the technologies SpeedSteep and Turbo Boost from Intel, and AMD Cool'n'Quiet. This work also presented a power management policy, which regulates the energy consumption via software, as well as the influence of workloads in the evaluation procedure of the power management policy. Furthermore, experiments to assess the use and power consumption of a Celeron D310 processor, and other experiments to change the energy states of the Pentium M 750 subjected to a workload were presented. These experiments motivated the proposal of a new power management policy.