-#include "colls.h"
+/* Copyright (c) 2013-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "colls_private.h"
/*****************************************************************************
* Function: alltoall_pair_light_barrier
MPI_Aint send_chunk, recv_chunk;
MPI_Status s;
int i, src, dst, rank, num_procs, next_partner;
- int tag = 1, success = 1; /*, failure = 0; */
+ int tag = COLL_TAG_ALLTOALL; /*, failure = 0; */
char send_sync = 'a', recv_sync = 'b';
char *send_ptr = (char *) send_buff;
char *recv_ptr = (char *) recv_buff;
- MPI_Comm_rank(comm, &rank);
- MPI_Comm_size(comm, &num_procs);
- MPI_Type_extent(send_type, &send_chunk);
- MPI_Type_extent(recv_type, &recv_chunk);
+ rank = smpi_comm_rank(comm);
+ num_procs = smpi_comm_size(comm);
+
+ if((num_procs&(num_procs-1)))
+ THROWF(arg_error,0, "alltoall pair algorithm can't be used with non power of two number of processes ! ");
+
+ send_chunk = smpi_datatype_get_extent(send_type);
+ recv_chunk = smpi_datatype_get_extent(recv_type);
send_chunk *= send_count;
recv_chunk *= recv_count;
- MPI_Sendrecv(send_ptr + rank * send_chunk, send_count, send_type, rank, tag,
+ smpi_mpi_sendrecv(send_ptr + rank * send_chunk, send_count, send_type, rank, tag,
recv_ptr + rank * recv_chunk, recv_count, recv_type, rank, tag,
comm, &s);
for (i = 1; i < num_procs; i++) {
src = dst = rank ^ i;
- MPI_Sendrecv(send_ptr + dst * send_chunk, send_count, send_type,
+ smpi_mpi_sendrecv(send_ptr + dst * send_chunk, send_count, send_type,
dst, tag, recv_ptr + src * recv_chunk, recv_count,
recv_type, src, tag, comm, &s);
if ((i + 1) < num_procs) {
next_partner = rank ^ (i + 1);
- MPI_Sendrecv(&send_sync, 1, MPI_CHAR, next_partner, tag,
+ smpi_mpi_sendrecv(&send_sync, 1, MPI_CHAR, next_partner, tag,
&recv_sync, 1, MPI_CHAR, next_partner, tag, comm, &s);
}
}
- return success;
+ return MPI_SUCCESS;
}