Power-aware scheduling under timing constraints for mission-critical embedded systems

Authors:
Jinfeng Liu;Pai H. Chou;Nader Bagherzadeh;Fadi Kurdahi
Affiliations:
Dept. of Electrical & Computer Engineering, University of California at Irvine, Irvine, CA;Dept. of Electrical & Computer Engineering, University of California at Irvine, Irvine, CA;Dept. of Electrical & Computer Engineering, University of California at Irvine, Irvine, CA;Dept. of Electrical & Computer Engineering, University of California at Irvine, Irvine, CA
Venue:
Proceedings of the 38th annual Design Automation Conference
Year:
2001

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Abstract

Power-aware systems are those that must make the best use of available power. They subsume traditional low-power systems in that they must not only minimize power when the budget is low, but also deliver high performance when required. This paper presents a new scheduling technique for supporting the design and evaluation of a class of power-aware systems in mission-critical applications. It satisfies stringent min/max timing and max power constraints. It also makes the best effort to satisfy the min power constraint in an attempt to fully utilize free power or to control power jitter. Experimental results show that our scheduler can improve performance and reduce energy cost simultaneously compared to hand-crafted designs for previous missions. This tool forms the basis of the IMPACCT system-level framework that will enable designers to explore many power-performance trade-offs with confidence.