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C
C Copyright (C) by Argonne National Laboratory
C See COPYRIGHT in top-level directory
C
C This program is based on the allpair.f test from the MPICH-1 test
C (test/pt2pt/allpair.f), which in turn was inspired by a bug report from
C fsset@corelli.lerc.nasa.gov (Scott Townsend)
program send
implicit none
include 'mpif.h'
integer ierr, errs, comm
logical mtestGetIntraComm
logical verbose
common /flags/ verbose
errs = 0
verbose = .false.
C verbose = .true.
call MTest_Init( ierr )
do while ( mtestGetIntraComm( comm, 2, .false. ) )
call test_pair_send( comm, errs )
call mtestFreeComm( comm )
enddo
C
call MTest_Finalize( errs )
C
end
C
subroutine test_pair_send( comm, errs )
implicit none
include 'mpif.h'
integer comm, errs
integer rank, size, ierr, next, prev, tag, count
integer TEST_SIZE
parameter (TEST_SIZE=2000)
integer status(MPI_STATUS_SIZE)
real send_buf(TEST_SIZE), recv_buf(TEST_SIZE)
logical verbose
common /flags/ verbose
C
if (verbose) then
print *, ' Send and recv'
endif
C
call mpi_comm_rank( comm, rank, ierr )
call mpi_comm_size( comm, size, ierr )
next = rank + 1
if (next .ge. size) next = 0
C
prev = rank - 1
if (prev .lt. 0) prev = size - 1
C
tag = 1123
count = TEST_SIZE / 5
C
call clear_test_data(recv_buf,TEST_SIZE)
C
if (rank .eq. 0) then
C
call init_test_data(send_buf,TEST_SIZE)
C
call MPI_Send(send_buf, count, MPI_REAL, next, tag,
. comm, ierr)
C
call MPI_Recv(recv_buf, TEST_SIZE, MPI_REAL,
. MPI_ANY_SOURCE, MPI_ANY_TAG, comm, status, ierr)
C
call msg_check( recv_buf, next, tag, count, status, TEST_SIZE,
. 'send and recv', errs )
else if (prev .eq. 0) then
call MPI_Recv(recv_buf, TEST_SIZE, MPI_REAL,
. MPI_ANY_SOURCE, MPI_ANY_TAG, comm, status, ierr)
call msg_check( recv_buf, prev, tag, count, status, TEST_SIZE,
. 'send and recv', errs )
C
call MPI_Send(recv_buf, count, MPI_REAL, prev, tag, comm, ierr)
end if
C
end
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