Date of Award:
5-2016
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Electrical and Computer Engineering
Department name when degree awarded
Computer Engineering
Committee Chair(s)
Thidapat Chantem
Committee
Thidapat Chantem
Committee
Koushik Chakraborty
Committee
Ryan Gerdes
Abstract
The shift from uniprocessor to multi-core architectures has made it difficult to design predictable hard real-time systems (HRTS) since guaranteeing deadlines while achieving high processor utilization remains a major challenge. In addition, due to increasing demands, energy efficiency has become an important design metric in HRTS. To obtain energy savings, most multi-core systems use dynamic voltage and frequency scaling (DVFS) to reduce dynamic power consumption when the system is underloaded. However, in many multi-core systems, DVFS is implemented using voltage and frequency islands (VFI), implying that individual cores cannot independently select their voltage and frequency (v/f) pairs, thus resulting in less energy savings when existing energy-aware task assignment and scheduling techniques are used. In this thesis, we present an analysis of the increase in energy consumption in the presence of VFI. Further, we propose a semi-partitioned approach called EDF-hv to reduce the energy consumption of HRTS on multi-core systems with VFI. Simulation results revealed that when workload imbalance among the cores is sufficiently high, EDF-hv can reduce system energy consumption by 15.9% on average.
Checksum
1264bbc3209201019752fbd07139b2d8
Recommended Citation
Patterson, Jesse, "An Energy-Efficient Semi-Partitioned Approach for Hard Real-Time Systems with Voltage and Frequency Islands" (2016). All Graduate Theses and Dissertations. 4969.
https://digitalcommons.usu.edu/etd/4969
Included in
Copyright for this work is retained by the student. If you have any questions regarding the inclusion of this work in the Digital Commons, please email us at .