Variable voltage task scheduling algorithms for minimizing energy

In this paper we propose variable voltage task scheduling algorithms (periodic as well as aperiodic) that minimize energy. We first apply the existing task scheduling algorithms to obtain a feasible schedule and then distribute the available slack using an iterative algorithm that satisfies the theoretically obtained relation for minimum energy. We show experimentally that the voltage assignment obtained by our algorithm is very close (0.1% error) to that of the optimal assignment.