X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/061f1e9720921cc227dab4f6ddeca9d30028e5d4..845590d7b4f0790c34191697d1b6c28d50d1ccbd:/src/smpi/colls/smpi_default_selector.cpp?ds=sidebyside

diff --git a/src/smpi/colls/smpi_default_selector.cpp b/src/smpi/colls/smpi_default_selector.cpp
index dca9430c06..1aebcf6a9b 100644
--- a/src/smpi/colls/smpi_default_selector.cpp
+++ b/src/smpi/colls/smpi_default_selector.cpp
@@ -89,70 +89,13 @@ int Coll_scatter_default::scatter(void *sendbuf, int sendcount, MPI_Datatype sen
 int Coll_reduce_default::reduce(void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root,
                      MPI_Comm comm)
 {
-  const int system_tag = COLL_TAG_REDUCE;
-  MPI_Aint lb = 0;
-  MPI_Aint dataext = 0;
-
-  char* sendtmpbuf = static_cast<char *>(sendbuf);
-
-  int rank = comm->rank();
-  int size = comm->size();
-  if (size <= 0)
-    return MPI_ERR_COMM;
   //non commutative case, use a working algo from openmpi
   if (op != MPI_OP_NULL && not op->is_commutative()) {
-    return Coll_reduce_ompi_basic_linear::reduce(sendtmpbuf, recvbuf, count, datatype, op, root, comm);
+    return Coll_reduce_ompi_basic_linear::reduce(sendbuf, recvbuf, count, datatype, op, root, comm);
   }
-
-  if( sendbuf == MPI_IN_PLACE ) {
-    sendtmpbuf = static_cast<char *>(smpi_get_tmp_sendbuffer(count*datatype->get_extent()));
-    Datatype::copy(recvbuf, count, datatype,sendtmpbuf, count, datatype);
-  }
-
-  if(rank != root) {
-    // Send buffer to root
-    Request::send(sendtmpbuf, count, datatype, root, system_tag, comm);
-  } else {
-    datatype->extent(&lb, &dataext);
-    // Local copy from root
-    if (sendtmpbuf != nullptr && recvbuf != nullptr)
-      Datatype::copy(sendtmpbuf, count, datatype, recvbuf, count, datatype);
-    // Receive buffers from senders
-    MPI_Request *requests = xbt_new(MPI_Request, size - 1);
-    void **tmpbufs = xbt_new(void *, size - 1);
-    int index = 0;
-    for (int src = 0; src < size; src++) {
-      if (src != root) {
-        tmpbufs[index] = smpi_get_tmp_sendbuffer(count * dataext);
-        requests[index] =
-          Request::irecv_init(tmpbufs[index], count, datatype, src, system_tag, comm);
-        index++;
-      }
-    }
-    // Wait for completion of irecv's.
-    Request::startall(size - 1, requests);
-    for (int src = 0; src < size - 1; src++) {
-      index = Request::waitany(size - 1, requests, MPI_STATUS_IGNORE);
-      XBT_DEBUG("finished waiting any request with index %d", index);
-      if(index == MPI_UNDEFINED) {
-        break;
-      }else{
-        Request::unref(&requests[index]);
-      }
-      if(op) /* op can be MPI_OP_NULL that does nothing */
-        if(op!=MPI_OP_NULL) op->apply( tmpbufs[index], recvbuf, &count, datatype);
-    }
-      for(index = 0; index < size - 1; index++) {
-        smpi_free_tmp_buffer(tmpbufs[index]);
-      }
-    xbt_free(tmpbufs);
-    xbt_free(requests);
-
-  }
-  if( sendbuf == MPI_IN_PLACE ) {
-    smpi_free_tmp_buffer(sendtmpbuf);
-  }
-  return MPI_SUCCESS;
+  MPI_Request request;
+  Colls::ireduce(sendbuf, recvbuf, count, datatype, op, root, comm, &request);
+  return Request::wait(&request, MPI_STATUS_IGNORE);
 }
 
 int Coll_allreduce_default::allreduce(void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)