Power and Resource Aware Scheduling with Multiple Voltages

In this paper, we address the problem of timing-constrained scheduling with resources operating at multiple voltages. Without the resource concern, a dual piecewise-linear programming formulation is proposed which can be transformed into a min-cost flow problem on a simplified flow graph. We present a two-stage method to minimize power and resource usage. In the first stage, an optimal dual piecewise-linear network simplex method (DPLNSM) is proposed to minimize the power consumption. The method is efficient, especially when the given maximum control step is large. In the second stage, a tabu-search based scheduling method is proposed to decrease the resource usage on the basis of power optimization, where tree transformation and list scheduling are done in each iteration. Experimental results show that our proposed method generates optimal solutions on the given benchmarks in a short time.