Low power scheduling with resources operating at multiple voltages

This paper presents (i) a resource constrained scheduling scheme and (ii) a latency-constrained scheduling scheme that minimize power consumption for the case when the resources operate at multiple voltages. The resource-constrained scheduling reduces the power consumption by maximally utilizing resources operating at reduced voltages and at the same time reducing the latency. The latency-constrained scheduling scheme reduces the power consumption by assigning as many nodes (of the data flow graph) as possible to the resources operating at reduced voltages. Two cases have been studied: one in which the possible operating voltages are 5 V and 3.3 V, and the other in which the operating voltages are 5 V, 3.3 V and 2.4 V. Experiments with some HLS benchmark examples show that the proposed schemes achieve significant power reduction.