We are having problems with OpenMPI 1.6.3 – it gives the below error message when trying to run:



$ mpirun -np 32 ./mpi_test.x




WARNING: It appears that your OpenFabrics subsystem is configured to only allow registering part of your physical memory.  This can cause MPI jobs to run with erratic performance, hang, and/or crash.



This may be caused by your OpenFabrics vendor limiting the amount of physical memory that can be registered.  You should investigate the relevant Linux kernel module parameters that control how much physical memory can be registered, and increase them to allow registering all physical memory on your machine.



See this Open MPI FAQ item for more information on these Linux kernel module





    http://www.open-mpi.org/faq/?category=openfabrics#ib-locked-pages <http://www.open-mpi.org/faq/?category=openfabrics#ib-locked-pages>



  Local host:              akutilm-0006.ors.hpc.mil


  Registerable memory:     131072 MiB


  Total memory:            258542 MiB



Your MPI job will continue, but may be behave poorly and/or hang.








[akutilm-0006.ors.hpc.mil:10970] 31 more processes have sent help message help-mpi-btl-openib.txt / reg mem limit low [akutilm-0006.ors.hpc.mil:10970] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages



Openmpi 1.4.3 works fine.



Any help would be greatly appreciated.