[OMPI users] OpenMPI at scale on Cray XK7

Hi, I am trying to run OpenMPI on the Cray XK7 system at Oak Ridge National Lab (Titan), and am running in an issue whereby MPI_Init seems to hang indefinitely, but this issue only arises at large scale, e.g., when running on 18560 compute nodes (with two MPI processes per node). The applicati

Re: [OMPI users] OpenMPI at scale on Cray XK7

large scale? We are running inter-communicator one-way sending if this makes any difference. Yours optimistically, Mike. On 4/22/13 3:17 PM, "Mike Clark" wrote: >Hi, > >I am trying to run OpenMPI on the Cray XK7 system at Oak Ridge National >Lab (Titan), and am running i