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Low power scheduling method using multiple supply voltages

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4 Author(s)
Kun-Lin Tsai ; Dept. of Electr. Eng., National Taiwan Univ., Taipei ; Ju-Yueh Lee ; Shanq-Jang Ruan ; Feipei Lai

In this paper, we propose a method to solve the multiple supply voltage scheduling problem which is to assign the operational nodes of a control/data flow graph to a voltage level to minimize the average power consumption within a given computation time. Different from the previous researches focused on the operational nodes in the critical path and utilized the slack time to change the voltage of other nodes, our method can deal with all nodes without considering whether the node is in the critical path or not, and the benefit is that the voltage assignment of each node becomes more flexible. The proposed method consists of two phases, the scheduling phase and the adjusting phase, and considers both the power (delay) of the computational components and the power (delay) of the level shifters. Experimental result shows that using three voltages on a number of standard benchmarks, an average power saving of 34.23% can be obtained if the delay overhead is set as 0, and 48.07% can be obtained if the total delay is set as 1.6 times of the original delay

Published in:

Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on

Date of Conference:

21-24 May 2006

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