Optimized self-tuning for circuit aging

Evelyn Mintarno, Joëlle Skaf, Rui Zheng, Jyothi Velamala, Yu Cao, Stephen Boyd, Robert W. Dutton, Subhasish Mitra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

32 Scopus citations


We present a framework and control policies for optimizing dynamic control of various self-tuning parameters over lifetime in the presence of circuit aging. Our framework introduces dynamic cooling as one of the self-tuning parameters, in addition to supply voltage and clock frequency. Our optimized self-tuning satisfies performance constraints at all times and maximizes a lifetime computational power efficiency (LCPE) metric, which is defined as the total number of clock cycles achieved over lifetime divided by the total energy consumed over lifetime. Our framework features three control policies: 1. Progressive-worst-case-aging (PWCA), which assumes worst-case aging at all times; 2. Progressive-on-state-aging (POSA), which estimates aging by tracking active/sleep mode, and then assumes worst-case aging in active mode and long recovery effects in sleep mode; 3. Progressive-real-time-aging-assisted (PRTA), which estimates the actual amount of aging and initiates optimized control action. Simulation results on benchmark circuits, using aging models validated by 45nm CMOS stress measurements, demonstrate the practicality and effectiveness of our approach. We also analyze design constraints and derive system design guidelines to maximize self-tuning benefits.

Original languageEnglish (US)
Title of host publicationDATE 10 - Design, Automation and Test in Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Print)9783981080162
StatePublished - 2010
EventDesign, Automation and Test in Europe Conference and Exhibition, DATE 2010 - Dresden, Germany
Duration: Mar 8 2010Mar 12 2010

Publication series

NameProceedings -Design, Automation and Test in Europe, DATE
ISSN (Print)1530-1591


OtherDesign, Automation and Test in Europe Conference and Exhibition, DATE 2010

ASJC Scopus subject areas

  • Engineering(all)


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