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A Task Assignment Method to Reduce Aging in Multi-core Processors

Saadatmand, Faezeh Sadat | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50138 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Miremadi, Ghassem
  7. Abstract:
  8. Reducing the size of transistors has dramatically increased the impacts of NBTI, HCI, and EM phenomena in comparison with decade ago. These phenomena are able to have influence on properties of different parts of a chip to make it changed gradually; including threshold voltage of a transistor and electrical conductivity of interconnections. These changes are known as the aging of a transistors that diminish the performance and reliability of a chip. A common reason that plays a significant role in all these phenomena is temperature. The temperature becomes more important when the power density increases per unit area due to decreased size of transistors, which is a trend in multi-core processors. To reduce the rate of aging in multi-core processors, a number of various methods should be applied at circuit, architecture, and system level, Depending on the type and application of the target system, each of these aging-mitigation methods has its own associated overheads, what could be controlled and reduced by the focal point in such researches. In this research, the target system is a multi-core embedded processor running real-time tasks. We propose a scheduling technique with the aim of reducing the temperature of the cores, and hence reducing the aging rate of the processor by allocating a load-balanced task. The proposed technique also reduces the hot spots and thermal cycling of functional units in the cores,which can improve the processor lifetime
  9. Keywords:
  10. Real Time ; Temperature ; Task Assignment ; Multicore Processors ; Wear-out ; Aging ; Real Time System

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