Re: [OMPI users] openmpi-2.0.2

Jim, can you please post your configure command line and test output on both systems ? fwiw, Open MPI strictly sticks to the (current) MPI standard regarding MPI_DATATYPE_NULL (see http://lists.mpi-forum.org/pipermail/mpi-forum/2016-January/006417.html) there have been some attempts

[OMPI users] Questions on rank-to-address mapping

Hi, I am trying to understand how connections are established among MPI ranks. Pardon for the list of questions. 1) Is there a global data structure that creates and stores rank to network address (uri or port number) mapping 2) How is the location of an MPI rank is determined in point-to-point

[OMPI users] openmpi-2.0.2

Hi, I have openmpi-2.0.2 builds on two different machines and I have a test code which works on one machine and does not on the other machine. I'm struggling to understand why and I hope that by posting here someone may have some insight. The test is using mpi derived data types and

Re: [OMPI users] Runtime error with OpenMPI via InfiniBand - [btl_openib_proc.c:157] ompi_modex_recv failed for peer

Dong -- I do not see an obvious cause for the error. Are you able to run trivial hello world / ring kinds of MPI jobs? Is the problem localized to a specific set of nodes in the cluster? > On Apr 14, 2017, at 4:30 PM, Dong Young Yoon wrote: > > Hi everyone, > > I am a