| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| subroutine init_comm |
| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| c--------------------------------------------------------------------- |
| c |
| c initialize MPI and establish rank and size |
| c |
| c This is a module in the MPI implementation of LUSSOR |
| c pseudo application from the NAS Parallel Benchmarks. |
| c |
| c--------------------------------------------------------------------- |
| |
| implicit none |
| |
| include 'mpinpb.h' |
| include 'applu.incl' |
| |
| integer nodedim |
| integer IERROR |
| |
| |
| c--------------------------------------------------------------------- |
| c initialize MPI communication |
| c--------------------------------------------------------------------- |
| call MPI_INIT( IERROR ) |
| |
| c--------------------------------------------------------------------- |
| c establish the global rank of this process |
| c--------------------------------------------------------------------- |
| call MPI_COMM_RANK( MPI_COMM_WORLD, |
| > id, |
| > IERROR ) |
| |
| c--------------------------------------------------------------------- |
| c establish the size of the global group |
| c--------------------------------------------------------------------- |
| call MPI_COMM_SIZE( MPI_COMM_WORLD, |
| > num, |
| > IERROR ) |
| |
| if (num .lt. nnodes_compiled) then |
| if (id .eq. 0) write (*,2000) num, nnodes_compiled |
| 2000 format(' Error: number of processes',i6, |
| > ' less than compiled',i6) |
| CALL MPI_ABORT( MPI_COMM_WORLD, MPI_ERR_OTHER, IERROR ) |
| endif |
| |
| ndim = nodedim(num) |
| |
| if (.not. convertdouble) then |
| dp_type = MPI_DOUBLE_PRECISION |
| else |
| dp_type = MPI_REAL |
| endif |
| |
| |
| return |
| end |
