On 14 April 2010 19:07, Pedro Torres <torres.pedrozpk at gmail.com> wrote: > Thanks, for a quickly reply. I have four nodes (GigaEthernet), each node > with two Quad Core E5410 at 2.33GHz, Mem 16Gb - DDR2 667Mhz., and definitely > I'm not have the enough memory bandwidth for a reasonable speedup. >
Smart process to core binding may help you (mpiexec.hydra -n 4/8 --binding topo:sockets), Open MPI has equivalent functionality http://wiki.mcs.anl.gov/mpich2/index.php/Using_the_Hydra_Process_Manager#Process-core_Binding -- Lisandro Dalcin --------------- CIMEC (INTEC/CONICET-UNL) Predio CONICET-Santa Fe Colectora RN 168 Km 472, Paraje El Pozo Tel: +54-342-4511594 (ext 1011) Tel/Fax: +54-342-4511169
