Rym Msadek, CNRS/CERFACS, Toulouse, France, Svenya Chripko, CECI/CERFACS, Université de Toulouse, Toulouse, France, Emilia Sanchez-Gomez, CERFACS European Centre for Research and Advanced Training in Scientific Computation, Toulouse Cedex 01, France and Laurent Terray, CERFACS, Toulouse, France