My application produces wrong results, if I use infiniband for the communication between two nodes (using MVAPICH2 as the MPI-implementation).
OpenMPI offers the possibility to specify the network with
$ mpirun --mca btl tcp,self ...
is there anything similar for MVAPICH2?
The MVAPICH2 documentation has a spot directly for this. Quoting from their page:
4.9 Configuring a build for TCP/IP-Nemesis
The use of TCP/IP with Nemesis channel requires the following configuration:
$ ./configure --with-device=ch3:nemesis
Both static and shared libraries are built by default. In order to build with static libraries only, configure as follows:
$ ./configure --with-device=ch3:nemesis --disable-shared
To enable use of the TotalView debugger, the library needs to be configured in the following manner:
$ ./configure --with-device=ch3:nemesis --enable-g=dbg --enable-debuginfo
Additional instructions for configuring with TCP/IP-Nemesis can be found in the MPICH documentation available at: http://www.mcs.anl.gov/research/projects/mpich2/documentation/index.php?s=docs