/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2017 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpiimpl.h"
/*
* Linear
*
* Simple send to each outgoing neighbor and recv from each incoming
* neighbor.
*/
#undef FUNCNAME
#define FUNCNAME MPIR_Ineighbor_alltoallw_sched_allcomm_linear
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
int MPIR_Ineighbor_alltoallw_sched_allcomm_linear(const void *sendbuf, const int sendcounts[],
const MPI_Aint sdispls[],
const MPI_Datatype sendtypes[], void *recvbuf,
const int recvcounts[], const MPI_Aint rdispls[],
const MPI_Datatype recvtypes[],
MPIR_Comm * comm_ptr, MPIR_Sched_t s)
{
int mpi_errno = MPI_SUCCESS;
int indegree, outdegree, weighted;
int k, l;
int *srcs, *dsts;
MPIR_CHKLMEM_DECL(2);
mpi_errno = MPIR_Topo_canon_nhb_count(comm_ptr, &indegree, &outdegree, &weighted);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
MPIR_CHKLMEM_MALLOC(srcs, int *, indegree * sizeof(int), mpi_errno, "srcs", MPL_MEM_COMM);
MPIR_CHKLMEM_MALLOC(dsts, int *, outdegree * sizeof(int), mpi_errno, "dsts", MPL_MEM_COMM);
mpi_errno = MPIR_Topo_canon_nhb(comm_ptr,
indegree, srcs, MPI_UNWEIGHTED,
outdegree, dsts, MPI_UNWEIGHTED);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
for (k = 0; k < outdegree; ++k) {
char *sb;
MPIR_Ensure_Aint_fits_in_pointer(MPIR_VOID_PTR_CAST_TO_MPI_AINT sendbuf + sdispls[k]);
sb = ((char *) sendbuf) + sdispls[k];
mpi_errno = MPIR_Sched_send(sb, sendcounts[k], sendtypes[k], dsts[k], comm_ptr, s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
}
for (l = 0; l < indegree; ++l) {
char *rb;
MPIR_Ensure_Aint_fits_in_pointer(MPIR_VOID_PTR_CAST_TO_MPI_AINT recvbuf + rdispls[l]);
rb = ((char *) recvbuf) + rdispls[l];
mpi_errno = MPIR_Sched_recv(rb, recvcounts[l], recvtypes[l], srcs[l], comm_ptr, s);
if (mpi_errno)
MPIR_ERR_POP(mpi_errno);
}
MPIR_SCHED_BARRIER(s);
fn_exit:
MPIR_CHKLMEM_FREEALL();
return mpi_errno;
fn_fail:
goto fn_exit;
}