I have a problem with a "fairly simple" program regarding a non finishing MPI_BARRIER using 7 nodes on 2 computers.
I have modified the test.f90 program supplied with MPI 4.0.2.005 to cause the problemand I have added the file as an attachment here.
The program is compiled through Visual Studio 2008 withIntel ComposerXE-2011 version 220.127.116.11 Build 20110427
1 laptop 2 corerunning 1 mpi thread
1 computer 12 corerunning 6 mpi threads
mpiexec -hosts 2 host1 1 host 2 6 "MPI Test.exe"
Using the 2 hosts with their max number of cores or with only 1 core works.
From the fortran and the output can you give any hints as to why the program does not finish?