TY - JOUR T1 - SIMCAN: A flexible, scalable and expandable simulation platform for modelling and simulating distributed architectures and applications JF - Simulation Modelling Practice and Theory Y1 - 2012 A1 - Alberto Nuñez A1 - Javier Fernández A1 - Rosa Filgueira A1 - Félix García Carballeira A1 - Jesús Carretero VL - 20 ER - TY - JOUR T1 - Adaptive CoMPI: Enhancing MPI based applications performance and scalability by using adaptive compression. JF - International Journal of High Performance Computing and Applications, 2010. Sage Y1 - 2010 A1 - Rosa Filgueira A1 - David E. Singh A1 - Alejandro Calderón A1 - Félix García Carballeira A1 - Jesús Carretero AB - This paper presents an optimization of MPI communication, called Adaptive-CoMPI, based on runtime compression of MPI messages exchanged by applications. The technique developed can be used for any application, because its implementation is transparent for the user, and integrates different compression algorithms for both MPI collective and point-to-point primitives. Furthermore, compression is turned on and off and the most appropriate compression algorithms are selected at runtime, depending on the characteristics of each message, the network behavior, and compression algorithm behavior, following a runtime adaptive strategy. Our system can be optimized for a specific application, through a guided strategy, to reduce the runtime strategy overhead. Adaptive-CoMPI has been validated using several MPI benchmarks and real HPC applications. Results show that, in most cases, by using adaptive compression, communication time is reduced, enhancing application performance and scalability. IS - 25 (3) ER - TY - JOUR T1 - Specifying use case behavior with interaction models JF - Journal of Object Technology Y1 - 2005 A1 - José Daniel Garcia A1 - Jesús Carretero A1 - José Maria Pérez A1 - Félix García Carballeira A1 - Rosa Filgueira VL - 4 ER -