0
我想使用MPI_SEND()和MPI_RECV()一个孩子,其父进程,通过使用MPI_Comm_spawn创造之间的沟通创造了父子进程之间MPI_RECV如下面可以看到:使用MPI_SEND与MPI_Comm_spawn
Parent.f90
program master
use mpi
implicit none
integer :: ierr, num_procs, my_id, intercomm, i, array(10), tag
CALL MPI_INIT(ierr)
CALL MPI_COMM_RANK(MPI_COMM_WORLD, my_id, ierr)
CALL MPI_COMM_SIZE(MPI_COMM_WORLD, num_procs, ierr)
if (.not. (ierr .eq. 0)) then
print*, "S.Unable to initilaize!"
stop
endif
if (my_id .eq. 0) then
call MPI_Comm_spawn("./child.out", MPI_ARGV_NULL, 1, MPI_INFO_NULL, my_id, &
& MPI_COMM_WORLD, intercomm, MPI_ERRCODES_IGNORE, ierr)
call MPI_Send(array, 255, MPI_INTEGER, my_id, tag, intercomm, ierr)
endif
call MPI_Finalize(ierr)
end program master
Child.f90
program name
use mpi
implicit none
! type declaration statements
integer :: ierr, parent, my_id, n_procs, i, array(10), tag, intercomm
logical :: flag, high
! executable statements
call MPI_Init(ierr)
call MPI_Initialized(flag, ierr)
call MPI_Comm_get_parent(parent, ierr)
call MPI_Comm_rank(MPI_COMM_WORLD, my_id, ierr)
call MPI_Comm_size(MPI_COMM_WORLD, n_procs, ierr)
print *, "Initilaized? ", flag
print *, "My mommy is: ", parent
print *, "My rank is:", my_id
tag = 1
call MPI_Recv(array, 255, MPI_INTEGER, MPI_ANY_SOURCE, tag, parent, MPI_STATUS_IGNORE, ierr)
print *, "Client received array."
call MPI_Finalize(ierr)
end program name
当上面的程序运行时,家长似乎经过精细跑,但孩子从来首席ts:“客户端收到数组”,导致我相信我已经搞砸了send/recv。
如果不清楚我想实现的目标,我希望父项产生子项,向该子项发送一个数组,子项用于处理数组,子项将数组发送回父项。 (斜体字还没写,我想这基本通信第一个工作日)
此刻,当我运行:mpiexec -np 1 parent.out
,孩子打印:
Initilaized? T
My mommy is: 3
My rank is: 0
,而不是“客户端接收阵列。 “