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Article Dans Une Revue Real-Time Systems Année : 2011

Hybrid Power Management in Real Time Embedded Systems: An Interplay of DVFS and DPM Techniques

Résumé

Energy-aware scheduling of real time applications over multiprocessor systems is considered in this paper. Early research reports that while various energy-saving policies, for instance Dynamic Power Management (DPM) and Dynamic Voltage & Frequency scaling (DVFS) policies, perform well individually for a specific set of operating conditions, they often outperform each other under different workload and/or architecture configuration. Thus, no single policy fits perfectly all operating conditions. Instead of designing new policies for specific operating conditions, this paper proposes a generic power/energy management scheme that takes a set of well-known existing (DPM and DVFS) policies, each of which performs well for a set of conditions, and adapts at runtime to the best-performing policy for any given workload. Experiments are performed using state-of the-art DPM and DVFS policies and the results show that our proposed scheme adapts well to the changing workload and always achieves overall energy savings comparable to that of best-performing policy at any point in time.

Dates et versions

hal-00819671 , version 1 (02-05-2013)

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K. Bhatti, Michel Auguin, Cécile Belleudy. Hybrid Power Management in Real Time Embedded Systems: An Interplay of DVFS and DPM Techniques. Real-Time Systems, 2011, 47, pp.143-162. ⟨10.1007/s11241-011-9116-y⟩. ⟨hal-00819671⟩
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