Infiniband Install

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4:52:56 PM PDT - Mon, Aug 27th 2012

Thanks for the suggestions. OpenMPI was not installed with MPI_THREAD_MULTIPLE support. I don’t have access to reinstall OpenMPI. I can ask my admin but things like this seem to take a long time to get resolved because of others using the system. I also have access to MVapich2, could this be a better chose? I’m not familiar with MVapich2 nor do I know if one is better than the other.

Thanks again

Mvapich2 could work, but you need first to check if it does support MPI_THREAD_MULTIPLE with a simple MPI test program like the one at the bottom of this posting.
Please keep in mind that you need to disable the mvapich2 CPU affinity by using the following environment variable

MV2_ENABLE_AFFINITY=0

$ cat mpithreadcheck.f

implicit none

INCLUDE 'mpif.h'

INTEGER REQUIRED, PROVIDED, IERROR

INTEGER myrank,mysize,rc

REQUIRED=MPI_THREAD_MULTIPLE

CALL MPI_INIT_THREAD(REQUIRED, PROVIDED, IERROR)

call MPI_COMM_SIZE(MPI_COMM_WORLD,mysize,ierror)

call MPI_COMM_RANK(MPI_COMM_WORLD,myrank,ierror)

print *, 'Hello World! I am ', myrank

if(myrank.eq.0)then

write(6,*) ' IERROR ',IERROR

if(PROVIDED.NE.MPI_THREAD_MULTIPLE) then

write(6,*) ' MPI_THREAD_MULTIPLE not supported'

else

write(6,*) ' MPI_THREAD_MULTIPLE is supported'

endif

call MPI_FINALIZE(rc)

end