set the processor with the biggest load to the highest gear and then compute the scaling factor values for the rest of the processors. Although this model was built for parallel architectures, it can be adapted to distributed architectures by taking into account the communications.
The primary contribution of our paper is presenting a new online scaling factor selection method which has the following characteristics :
\begin{enumerate}
-\item It is based on Rauber and Rünger analytical model to predict the energy consumption and the execution time of the application with different frequency gears.
+\item It is based on Rauber and Rünger analytical model to predict the energy consumption of the application with different frequency gears.
\item It selects the frequency scaling factor for simultaneously optimizing energy reduction and maintaining performance.
\item It is well adapted to distributed architectures because it takes into account the communication time.
\item It is well adapted to distributed applications with imbalanced tasks.
\section*{Acknowledgment}
-Computations have been performed on the supercomputer facilities of the
+This work has been supported by the Labex ACTION project (contract ``ANR-11-LABX-01-01'').Computations have been performed on the supercomputer facilities of the
Mésocentre de calcul de Franche-Comté. As a PhD student, M. Ahmed Fanfakh, would like to thank the University of
Babylon (Iraq) for supporting his work.
