  In this chapter we focus on slack reclamation and propose a new slack
reclamation technique, Multiple Frequency Selection DVFS (MFS-DVFS). The key
idea is to execute each task with a linear combination of more than one
frequency such that this combination results in using the lowest energy by
covering the whole slack time of the task. We have tested our algorithm with
both random and real-world application task graphs and compared with the
results in previous researches in [9] and [12-13]. The experimental results
show that our approach can achieve energy almost identical to the optimum
energy saving.
