Persistent Reduce-Scatter with Equal Blocks

7.13.9. Persistent Reduce-Scatter with Equal Blocks

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MPI_REDUCE_SCATTER_BLOCK_INIT(sendbuf, recvbuf, recvcount, datatype, op, comm, info, request)
IN sendbuf	starting address of send buffer (choice)
OUT recvbuf	starting address of receive buffer (choice)
IN recvcount	element count per block (nonnegative integer)
IN datatype	datatype of elements of send and receive buffers (handle)
IN op	operation (handle)
IN comm	communicator (handle)
IN info	info argument (handle)
OUT request	communication request (handle)

C binding
int MPI_Reduce_scatter_block_init(const void *sendbuf, void *recvbuf, int recvcount, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Info info, MPI_Request *request) int MPI_Reduce_scatter_block_init_c(const void *sendbuf, void *recvbuf, MPI_Count recvcount, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm, MPI_Info info, MPI_Request *request) Fortran 2008 binding
MPI_Reduce_scatter_block_init(sendbuf, recvbuf, recvcount, datatype, op, comm, info, request, ierror) TYPE(*), DIMENSION(..), INTENT(IN), ASYNCHRONOUS :: sendbuf TYPE(*), DIMENSION(..), ASYNCHRONOUS :: recvbuf INTEGER, INTENT(IN) :: recvcount TYPE(MPI_Datatype), INTENT(IN) :: datatype TYPE(MPI_Op), INTENT(IN) :: op TYPE(MPI_Comm), INTENT(IN) :: comm TYPE(MPI_Info), INTENT(IN) :: info TYPE(MPI_Request), INTENT(OUT) :: request INTEGER, OPTIONAL, INTENT(OUT) :: ierror MPI_Reduce_scatter_block_init(sendbuf, recvbuf, recvcount, datatype, op, comm, info, request, ierror) !(_c) TYPE(*), DIMENSION(..), INTENT(IN), ASYNCHRONOUS :: sendbuf TYPE(*), DIMENSION(..), ASYNCHRONOUS :: recvbuf INTEGER(KIND=MPI_COUNT_KIND), INTENT(IN) :: recvcount TYPE(MPI_Datatype), INTENT(IN) :: datatype TYPE(MPI_Op), INTENT(IN) :: op TYPE(MPI_Comm), INTENT(IN) :: comm TYPE(MPI_Info), INTENT(IN) :: info TYPE(MPI_Request), INTENT(OUT) :: request INTEGER, OPTIONAL, INTENT(OUT) :: ierror Fortran binding
MPI_REDUCE_SCATTER_BLOCK_INIT(SENDBUF, RECVBUF, RECVCOUNT, DATATYPE, OP, COMM, INFO, REQUEST, IERROR) <type> SENDBUF(*), RECVBUF(*) INTEGER RECVCOUNT, DATATYPE, OP, COMM, INFO, REQUEST, IERROR

Creates a persistent collective communication request for the reduce-scatter with equal blocks operation (see Section MPI_REDUCE_SCATTER_BLOCK).

Up: Persistent Collective Operations Next: Persistent Reduce-Scatter Previous: Persistent All-Reduce

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