X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/15badc71ce964f6dae6428c9a4c0198fad5d4936..1687df79d61a9418bba830bbd0ab7de16e457090:/src/smpi/colls/allgather-3dmesh.c

diff --git a/src/smpi/colls/allgather-3dmesh.c b/src/smpi/colls/allgather-3dmesh.c
index dfd2ace9e6..ab964a1388 100644
--- a/src/smpi/colls/allgather-3dmesh.c
+++ b/src/smpi/colls/allgather-3dmesh.c
@@ -1,3 +1,9 @@
+/* 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"
 
 /*****************************************************************************
@@ -97,13 +103,15 @@ int smpi_coll_tuned_allgather_3dmesh(void *send_buff, int send_count,
   int i, src, dst, rank, num_procs, block_size, my_z_base;
   int my_z, X, Y, Z, send_offset, recv_offset;
   int two_dsize, my_row_base, my_col_base, src_row_base, src_z_base, num_reqs;
-  int tag = 1;
+  int tag = COLL_TAG_ALLGATHER;
 
   rank = smpi_comm_rank(comm);
   num_procs = smpi_comm_size(comm);
   extent = smpi_datatype_get_extent(send_type);
 
-  is_3dmesh(num_procs, &X, &Y, &Z);
+  if (!is_3dmesh(num_procs, &X, &Y, &Z))
+    THROWF(arg_error,0, "allgather_3dmesh algorithm can't be used with this number of processes! ");
+
 
   num_reqs = X;