Hi. >Is there a known problem with score5.0.1 and maximum transferrate's on >myrinet-cards?? Have you tried with mpi_zerocopy=on option ? This option enables zero-copy message transferof PM and you will get much better transfer rate. % mpirun -np <NN> -score mpi_zerocopy=on a.out ---- Atsushi HORI Swimmy Software, Inc.