I am using OpenMPI 1.10.1 built with Intel compilers 16.0.3 on Centos 6.7. Our cluster has some cells where the nodes have infiniband and some cell with 10GB IP. I am hoping that I can build just one version of OpenMPI that can run on both infiniband and IP cells and not get any network-related warnings. I configured and built OpenMPI on a node with infiniband as follows:
./configure CXX=icpc CC=icc FC=ifort --prefix=/opt/openmpi/1.10.1-intel16.0 \ --enable-mpirun-prefix-by-default --with-threads --enable-mpi-thread-multiple \ --with-tm=/opt/torque/active --with-verbs=/usr --with-verbs-libdir=/usr/lib64 We are using OFED 3.2 that is part of the Centos distribution. When I run a program built with this version of OpenMPI and configured as described above on a cell with infiniband, the program runs without any warnings or errors. However, when I run on an IP-based cell, I get the following warning: ---------------------------------------------------------- A high-performance Open MPI point-to-point messaging module was unable to find any relevant network interfaces: Module: OpenFabrics (openib) Host: k07 Another transport will be used instead, although this may result in lower performance. ————————————————————————————————————————— The program runs correctly but I am wondering if there is a way to get rid of the warning. I am aware of the MCA btl arguments that can be used with mpirun to specify ib or ip but I was hoping I didn’t have to burden my users with those details. Is there a way to configure OpenMPI to run on either IB or IP without warnings. Thank you, Susan Susan Schwarz Research Software Engineer Research Computing Dartmouth College Hanover, NH 03755
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