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Publication - Professor Kerstin Eder

    On the limitations of analysing worst-case dynamic energy of processing


    Morse, J, Kerrison, S & Eder, K, 2018, ‘On the limitations of analysing worst-case dynamic energy of processing’. ACM Transactions on Embedded Computing Systems, vol 17.


    This article examines dynamic energy consumption caused by data during software execution on deeply embedded microprocessors, which can be significant on some devices. In worst-case energy consumption analysis, energy models are used to find the most costly execution path. Taking each instruction’s worst-case energy produces a safe but overly pessimistic upper bound. Algorithms for safe and tight bounds would be desirable. We show that finding exact worst-case energy is NP-hard, and that tight bounds cannot be approximated with guaranteed safety. We conclude that any energy model targeting tightness must either sacrifice safety or accept overapproximation proportional to data-dependent energy.

    Full details in the University publications repository