[OMPI users] OpenMPI collective algorithm selection

2013-04-05 Thread chandan basu
depending on data size and comm size. So I think giving a rules file can improve the performance over a range of data sizes and comm size. Any help in this regard will be appreciated. With regards, -Chandan Dr. Chandan Basu National Supercomputer Center

[OMPI users] MPI_Alltoall

2007-02-23 Thread Chandan Basu
I am trying to use MPI_Alltoall in the following program. After execution all the nodes should show same value for the array su. However only the root node is showing correct value. other nodes are giving garbage value. Please help. I have used openmpi version "1.1.4". The mpif90 uses intel fortr