State of the Art of the Intra-Task Dynamic Voltage and Frequency Scaling Technique

In recent years there has been an increasing use of embedded systems because of advances in technology, the reduction of the costs of electronic equipment and mainly the popularity of mobile devices. Many of these systems implement low power consumption policies to extend their autonomy, usually because they have a reduced amount of resources and the great majority of them use electric power from batteries. One way to minimize the power consumption of these devices is through of the application of low power consumption techniques. From the various techniques presented in the literature - the intra-task Dynamic Voltage and Frequency Scaling (DVFS) has played an important role. The main aim of DVFS is to allow each task to manage the minimum resources necessary for tasks execution, this way reducing the processor power consumption and, at the same time, respecting the task deadlines when considered a real-time system context. Therefore, this paper aims to apply a systematic literature review with the goal of identifying and presenting the main methods using the intra-task DVFS technique, applied in the context of real-time systems to reduce energy consumption on the processor. Finally, this work will show the advantages and disadvantages of each cataloged methodology.Comment: 94 pages, in Portugues