Quasi-Static Voltage Scaling for Energy Minimization with Time Constraints
Design Automation and Test in Europe Conference (DATE 2005), Munich, Germany, March 7-11, 2005, pp. 514-519
Supply voltage scaling and adaptive body-biasing are important techniques that help to reduce the energy dissipation of embedded systems. This is achieved by dynamically adjusting the voltage and performance settings according to the application needs. In order to take full advantage of slack that arises from variations in the execution time, it is important to recalculate the voltage (performance) settings during run-time, i.e., online. However, voltage scaling (VS) is computationally expensive, and thus significantly hampers the possible energy savings. To overcome the online complexity, we propose a quasi-static voltage scaling scheme, with a constant online time complexityO(1). This allows to increase the exploitable slack as well as to avoid the energy dissipated due to online recalculation of the voltage settings. We conduct several experiments that demonstrate the advantages of the proposed technique over the previously published voltage scaling approaches.
[ASEP05] Alexandru Andrei, Marcus Schmitz, Petru Eles, Zebo Peng, Bashir M. Al-Hashimi, "Quasi-Static Voltage Scaling for Energy Minimization with Time Constraints", Design Automation and Test in Europe Conference (DATE 2005), Munich, Germany, March 7-11, 2005, pp. 514-519