Dear all,
I was able to solve the MPI variable problem.
For the users who may have the same issue once:
if ( this_mpi_process == max_rank )
{
for (unsigned int i = 0; i < n_mpi_processes; ++i)
{
if ( i != max_rank )
MPI_Send(&position, 1, MPI_DOUBLE, i, 0, mpi_com);
}
}
else
{
MPI_Recv(&position, 1, MPI_DOUBLE, max_rank, 0, mpi_com,
MPI_STATUS_IGNORE);
printf("Process %d received number from process %d\n",
this_mpi_process, max_rank);
}
A double variable called position (just as an example here, you have to
pass x,y,z, so 3 variables) can be defined earlier which has then to be
filled on the rank equal to max_rank.
Finally, I can proceed. The code was tested for ranks 1 to 16 and works
perfectly. Every time the maximum value and position remains correct and
unchanged, but the maximum rank (max_rank) changes dependent on the core
numbers.
Thank you a lot.
The community here is extraordinary. ;)
Best regards,
S. A. Mohseni
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