Banca de DEFESA: GESSE JUSTINIANO DE OLIVEIRA JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GESSE JUSTINIANO DE OLIVEIRA JUNIOR
DATE: 03/06/2022
TIME: 13:00
LOCAL: Instituto de Computação
TITLE:

Evaluation of Scheduling Algorithms and Energy Savings for FreeRTOS-based Embedded Systems

KEY WORDS:

Real-Time Systems, Energy Savings, Dynamic Power Management, Embedded Systems, FreeRTOS

PAGES: 181
BIG AREA: Ciências Exatas e da Terra
AREA: Ciência da Computação
SUBÁREA: Sistemas de Computação
SPECIALTY: Software Básico
SUMMARY:

Embedded systems, increasingly present in our daily lives, are becoming more complex and powerful due to technological advances in computing and electronics. Real-time embedded systems applications related to the automotive and aeronautical industries are prominent examples of classical engineering disciplines, where the conflicts between costs, short product life cycles and legal requirements regarding reliability, robustness and safety arise. became a problem. Indeed, managing energy effectively and efficiently is crucial for all battery powered devices, for example those applied in autonomous robots, wearable devices, industrial controllers and wireless sensor networks. Determining effective scheduling algorithms in real-time systems where task deadlines are met is a topic widely addressed in the state of the art, always aiming to improve applications in different environments.
When the approach applied is via fixed priority scheduling, which does not change as a function of time, the computational cost is lower than dynamic priority scheduling, since it is not necessary to dynamically order the task queue. In embedded systems with small processing power, the use of Earliest-Deadline First (EDF), a dynamic priority scheduling policy, is often less seen, although there are many efforts to use it in this segment, demonstrating that overhead may be feasible. When using the DVFS technique, the frequency and voltage of the CPU supply are manipulated during the execution of the tasks, in order to reduce the power dissipated by the processor. With the use of the DPM technique, the idle components at a given instant of time t, can be turned off or placed in low energy modes in order to reduce the power consumed by the processor when performing some action in the system. The focus of the present work is to adapt FreeRTOS, the real-time operating system, in order to make it capable of dealing with applications that have time constraints and energy consumption. A new energy saving technique based on DPM, with low computational overhead, was created to be used on platforms with few hardware resources.

BANKING MEMBERS:
Presidente - 2215121 - GEORGE MARCONI DE ARAUJO LIMA
Interno - 2187144 - VINICIUS TAVARES PETRUCCI
Externo ao Programa - 945.454.565-53 - ALLAN EDGARD SILVA FREITAS - UFBA