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Energy-efficient, utility accrual real-time scheduling under the unimodal arbitrary arrival model

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3 Author(s)
Wu, H. ; Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., USA ; Ravindran, B. ; Jensen, E.D.

We present an energy-efficient real-time scheduling algorithm called EUA*, for the unimodal arbitrary arrival model (or UAM). UAM embodies a "stronger" adversary than most arrival models. The algorithm considers application activities that are subject to time/utility function time constraints, UAM, and the multi-criteria scheduling objective of probabilistically satisfying utility lower bounds, and maximizing system-level energy efficiency. Since the scheduling problem is intractable, EUA* allocates CPU cycles, scales clock frequency, and heuristically computes schedules using statistical estimates of cycle demands, in polynomial-time. We establish that EUA* achieves optimal timeliness during under-loads, and identify the conditions under which timeliness assurances hold. Our simulation experiments illustrate EUA*'s superiority.

Published in:

Design, Automation and Test in Europe, 2005. Proceedings

Date of Conference:

7-11 March 2005