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Power Management Reliability-aware in Mixed-criticality Embedded Systems

Navardi, Mozhgan | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51957 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Ejlali, Alireza
  7. Abstract:
  8. Mixed-Criticality Systems (MCSs) include tasks that have multiple levels of criticality and they operate in dierent modes. These systems bring benets such as energy and resource cost saving. However, there are challenges in how to manage available resources in order to achieve high utilization, low power consumption, and required reliability. In many cases, these goals are in conict with each other. For example, if ermal Design Power (TDP) was a constraint on the power consumption of the chip, an approach that increases the utilization, unaware of power consumption, can oversteps TDP and leads to permanent or transient faults. Hence aging balancing and task re-execution are utilized to reduce permanent and transient faults rate. In this work, we introduce an approach named Lifetime Peak Power approa in MCSs (LPP-MC) to guarantee the reliability, along with peak power reduction. This approach maps the tasks by using a novel metric called Reliability-Power Metric (RPM). The LPP-MC applies this metric to distribute power among cores furthermore aging balancing. After mapping, the LPP-MC uses task re-execution, to achieve the required reliability level. To evaluate the proposed approach we use a real avionics task set and randomly generated task sets. The simulation results show that the proposed approach mitigates the aging rate and reduces peak power by up to 25% and 18%, respectively
  9. Keywords:
  10. Life Time ; Fault Tolerance ; Mixed-Criticality Emdedded Systems ; Peak Power Consumption ; Thermal Design Power ; Power Consumption ; Reliability

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