| Abstract |
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Dynamic voltage scaling (DVS) is a known effective mechanism for reducing CPU energy consumption without significant performance degradation. While a lot of work has been done on inter-task scheduling algorithms to implement DVS under operating system control, new research challenges exist in intra-task DVS techniques under software and compiler control. In this paper we introduce a novel intra-task DVS technique under compiler control using program checkpoints. Checkpoints are generated at compile time and indicate places in the code where the processor speed and voltage should be re-calculated. Check-points also carry user-defined time constraints. Our technique handles multiple intra-task performance deadlines and modulates power consumption according to a run-time power budget. We experimented with two heuristics for adjusting the clock frequency and voltage. For the particular benchmark studied, one heuristic yielded 63% more energy savings than the other. With the best of the heuristics we designed, our technique resulted in 82% energy savings over the execution of the program without employing DVS.
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 Additional Information
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Citation:
A. Azevedo, I. Issenin, R. Cornea, R. Gupta, N. Dutt, A. Veidenbaum, A. Nicolau,
"Profile-Based Dynamic Voltage Scheduling Using Program Checkpoints,"
date,
p. 0168,
2002 Design, Automation and Test in Europe Conference and Exhibition (DATE'02),
2002
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