1 C -*- Mode: Fortran; -*-
3 C (C) 2012 by Argonne National Laboratory.
4 C See COPYRIGHT in top-level directory.
6 C A simple test for Fortran support of Reduce_scatter_block
7 C with or withoutMPI_IN_PLACE.
13 parameter (MAX_SIZE=1024)
14 integer sbuf(MAX_SIZE), rbuf(MAX_SIZE)
15 integer comm, rank, size
16 integer sumval, ierr, errs, i
19 call mtest_init( ierr )
22 call mpi_comm_rank( comm, rank, ierr )
23 call mpi_comm_size( comm, size, ierr )
26 sbuf(i) = rank + (i-1)
29 call MPI_Reduce_scatter_block(sbuf, rbuf, 1, MPI_INTEGER,
30 . MPI_SUM, comm, ierr)
32 sumval = size * rank + ((size-1) * size)/2
33 if ( rbuf(1) .ne. sumval ) then
35 print *, 'Reduce_scatter_block does not get expected value.'
36 print *, '[', rank, ']', 'Got ', rbuf(1), ' but expected ',
42 rbuf(i) = rank + (i-1)
44 call MPI_Reduce_scatter_block(MPI_IN_PLACE, rbuf, 1, MPI_INTEGER,
45 . MPI_SUM, comm, ierr)
46 if ( rbuf(1) .ne. sumval ) then
48 print *, 'Reduce_scatter_block does not get expected value.'
49 print *, '[', rank, ']', 'Got ', rbuf(1), ' but expected ',
53 call mtest_finalize( errs )
54 call mpi_finalize( ierr )