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Power-aware scheduling of conditional task graphs in real-time multiprocessor systems

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2 Author(s)
Dongkun Shin ; Sch. of Comput. Sci., Seoul Nat. Univ., South Korea ; Jihong Kim

We propose a novel power-aware task scheduling algorithm for DVS-enabled real-time multiprocessor systems. Unlike the existing algorithms, the proposed DVS algorithm can handle conditional task graphs (CTGs) which model more complex precedence constraints. We first propose a condition-unaware task scheduling algorithm integrating the task ordering algorithm for CTGs and the task stretching algorithm for unconditional task graphs. We then describe a condition-aware task scheduling algorithm which assigns to each task the start time and the clock speed, taking account of the condition matching and task execution profiles. Experimental results show that the proposed condition-aware task scheduling algorithm can reduce the energy consumption by 50% on average over the non-DVS task scheduling algorithm.

Published in:

Low Power Electronics and Design, 2003. ISLPED '03. Proceedings of the 2003 International Symposium on

Date of Conference:

25-27 Aug. 2003