X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/9b73466ada27682d1729f394549479da83ef4a99..1687df79d61a9418bba830bbd0ab7de16e457090:/src/smpi/colls/allgather-loosely-lr.c

diff --git a/src/smpi/colls/allgather-loosely-lr.c b/src/smpi/colls/allgather-loosely-lr.c
index 04c7faff15..74df884b27 100644
--- a/src/smpi/colls/allgather-loosely-lr.c
+++ b/src/smpi/colls/allgather-loosely-lr.c
@@ -1,8 +1,10 @@
-#include "colls_private.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. */
 
-#ifndef NUM_CORE
-#define NUM_CORE 4
-#endif
+#include "colls_private.h"
 
 int smpi_coll_tuned_allgather_loosely_lr(void *sbuf, int scount,
                                          MPI_Datatype stype, void *rbuf,
@@ -16,6 +18,18 @@ int smpi_coll_tuned_allgather_loosely_lr(void *sbuf, int scount,
   int inter_dst, inter_src;
 
   comm_size = smpi_comm_size(comm);
+
+if(smpi_comm_get_leaders_comm(comm)==MPI_COMM_NULL){
+    smpi_comm_init_smp(comm);
+  }
+  int num_core=1;
+  if (smpi_comm_is_uniform(comm)){
+    num_core = smpi_comm_size(smpi_comm_get_intra_comm(comm));
+  }
+
+  if(comm_size%num_core)
+    THROWF(arg_error,0, "allgather loosely lr algorithm can't be used with non multiple of NUM_CORE=%d number of processes ! ",num_core);
+
   rank = smpi_comm_rank(comm);
   MPI_Aint rextent, sextent;
   rextent = smpi_datatype_get_extent(rtype);
@@ -32,10 +46,10 @@ int smpi_coll_tuned_allgather_loosely_lr(void *sbuf, int scount,
 
   MPI_Status status;
 
-  intra_rank = rank % NUM_CORE;
-  inter_rank = rank / NUM_CORE;
-  inter_comm_size = (comm_size + NUM_CORE - 1) / NUM_CORE;
-  intra_comm_size = NUM_CORE;
+  intra_rank = rank % num_core;
+  inter_rank = rank / num_core;
+  inter_comm_size = (comm_size + num_core - 1) / num_core;
+  intra_comm_size = num_core;
 
   int src_seg, dst_seg;
 
@@ -104,7 +118,7 @@ int smpi_coll_tuned_allgather_loosely_lr(void *sbuf, int scount,
     }                           // intra loop
 
 
-    // wait for inter communication to finish for these rounds (# of round equals NUM_CORE)
+    // wait for inter communication to finish for these rounds (# of round equals num_core)
     if (i != inter_comm_size - 1) {
       smpi_mpi_wait(&inter_rrequest, &status);
     }