我从Fortran的MPI开始,尝试从数组中进行分散。这是代码:
program test_scatter
use mpi
implicit none
integer :: ierr, rank, size, comm, i, j
integer, parameter :: dim = 5, dim_nodos = 4
real, dimension(dim, dim) :: panel_pos
real, dimension(dim_nodos) :: nodos
real :: rev_buf
forall(i = 1:dim_nodos) nodos(i) = i
comm = MPI_COMM_WORLD
call MPI_INIT(ierr)
call MPI_COMM_SIZE(comm, size, ierr)
call MPI_COMM_RANK(comm, rank, ierr)
call MPI_Bcast(panel_pos, dim*dim, MPI_REAL, 1, comm, ierr)
call MPI_Scatter(nodos, 1, MPI_REAL, rev_buf, 1, 1, comm, ierr)
print *, panel_pos, 'from rank', rank
! Finalizar MPI
call MPI_FINALIZE(ierr)
end program test_scatter
我尝试使用:
进行编译mpif90 test_scatter.F90 -o test_scatter.e
但是我收到了这个错误:
call MPI_Scatter(nodos, 1, MPI_REAL, rev_buf, 1, 1, comm, ierr) 1 Error: There is no specific subroutine for the generic ‘mpi_scatter’ at (1)
我有Debian测试。该系统是最新的。我安装OpenMPI如:
$ sudo apt-get install openmpi-bin openmpi-common openmpi-doc libopenmpi-dev
我做错了什么?
答案 0 :(得分:0)
如注释中所述,您还需要另外指定接收缓冲区的MPI_Datatype
:
call MPI_Scatter(nodos, 1, MPI_REAL, rev_buf, 1, MPI_REAL, 1, comm, ierr)