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Energy optimization of multiprocessor systems on chip by voltage selection
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory.
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory.
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, ESLAB - Embedded Systems Laboratory.
Diesel Systems for Commercial Vehicles, Robert Bosch GmbH, Stuttgart 70469, Germany.
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2007 (English)In: IEEE Transactions on Very Large Scale Integration (vlsi) Systems, ISSN 1063-8210, E-ISSN 1557-9999, Vol. 15, no 3, 262-275 p.Article in journal (Refereed) Published
Abstract [en]

Dynamic voltage selection and adaptive body biasing have been shown to reduce dynamic and leakage power consumption effectively. In this paper, we optimally solve the combined supply voltage and body bias selection problem for multiprocessor systems with imposed time constraints, explicitly taking into account the transition overheads implied by changing voltage levels. Both energy and time overheads are considered. The voltage selection technique achieves energy efficiency by simultaneously scaling the supply and body bias voltages in the case of processors and buses with repeaters, while energy efficiency on fat wires is achieved through dynamic voltage swing scaling. We investigate the continuous voltage selection as well as its discrete counterpart, and we prove strong NP-hardness in the discrete case. Furthermore, the continuous voltage selection problem is solved using nonlinear programming with polynomial time complexity, while for the discrete problem, we use mixed integer linear programming and a polynomial time heuristic. We propose an approach that combines voltage selection and processor shutdown in order to optimize the total energy. © 2007 IEEE.

Place, publisher, year, edition, pages
2007. Vol. 15, no 3, 262-275 p.
Keyword [en]
Energy management, Power minimization, Real-time systems, Voltage selection
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-49971DOI: 10.1109/TVLSI.2007.891101OAI: oai:DiVA.org:liu-49971DiVA: diva2:270867
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Andrei, AlexandruEles, Petru IonPeng, Zebo

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Andrei, AlexandruEles, Petru IonPeng, Zebo
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The Institute of TechnologyESLAB - Embedded Systems Laboratory
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