Xavier Martorell Nils Smeds Robert Walkup José R. Brunheroto George Almási John A. Gunnels Luiz De Rose Jesús Labarta Francesc Escalé Judit Gimenez Harald Servat José E. Moreira Blue Gene/L performance tools. 407-424 2005 49 IBM Journal of Research and Development 2-3 http://dx.doi.org/10.1147/rd.492.0407 db/journals/ibmrd/ibmrd49.html#MartorellSWBAGRLEGSM05