Josep M. Perez Barcelona Supercomputing Center, Jordi Girona 29, 08034 Barcelona, Spain (josep.m.perezbsc.es). Mr. Perez is a Researcher at the Barcelona Supercomputing Center. He holds an M.S. degree from the Technical University of Catalonia (Universitat Politècnica de Catalunya, or UPC) in Barcelona, where he is a doctoral candidate in computer science under the guidance of Dr. Rosa M. Badia. Mr. Perez's research interests include Grid programming models and multicore programming models.

Pieter Bellens Barcelona Supercomputing Center, Jordi Girona 29, 08034 Barcelona, Spain (pieter.bellensbsc.es). Mr. Bellens is a Researcher at the Barcelona Supercomputing Center. He holds computer science and engineering degrees from the Katholieke Universiteit Leuven, Belgium, and is a doctoral candidate in computer science at the Technical University of Catalonia (UPC), under the guidance of Dr. Rosa M. Badia and Dr. Jesús Labarta. Mr. Bellens' research interests include parallel computing, the Cell/B.E. processor, and scheduling.

Rosa M. Badia Barcelona Supercomputing Center, Jordi Girona 29, 08034 Barcelona, Spain (rosa.m.badiabsc.es). Dr. Badia is the Manager of Grid computing and clusters at the Barcelona Supercomputing Center. She is also an Associate Professor at the Computer Architecture department of the Technical University of Catalonia (UPC). She received B.S. and Ph.D. degrees in computer science from the Technical University of Catalonia in 1989 and 1994, respectively. Since 1989, she has been lecturing at the UPC on computer organization and architecture and very-large-scale integration (VLSI) design, in both undergraduate and graduate programs. Her current research interests include performance prediction and modeling of message-passing interface programs, programming models for the Grid, resource management in the Grid, and programming models for multicore processors. Dr. Badia has participated in several international research projects.

Jesús Labarta Barcelona Supercomputing Center, Jordi Girona 29, 08034 Barcelona, Spain (jesus.labartabsc.es). Professor Labarta is the Director of high-performance computing research at the Barcelona Supercomputing Center. He has been a full professor at the Computer Architecture department at the Technical University of Catalonia (UPC) since 1990. He has been lecturing on computer architecture, operating systems, computer networks, and performance evaluation since 1981. From 1995 to 2004 he was Director of Centro Europeo de Paralelismo de Barcelona (CEPBA) at the UPC. His research interest has been centered on parallel computing, covering areas from multiprocessor architecture, memory hierarchy, parallelizing compilers, operating systems, parallelization of numerical kernels, metacomputing tools, and performance analysis and prediction tools. Dr. Labarta has led the technical work of 15 industrial research and development projects at UPC.