X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cfbe67c7c286e364fd628fd361dac67690bfe333..f601168afb00f4b8b5d248df1a072c17ffcd91a8:/src/smpi/colls/reduce-mvapich-knomial.c

diff --git a/src/smpi/colls/reduce-mvapich-knomial.c b/src/smpi/colls/reduce-mvapich-knomial.c
index c5dc90882c..be7f303a34 100644
--- a/src/smpi/colls/reduce-mvapich-knomial.c
+++ b/src/smpi/colls/reduce-mvapich-knomial.c
@@ -40,6 +40,10 @@
  
 #include "colls_private.h"
 extern int mv2_reduce_intra_knomial_factor;
+extern int mv2_reduce_inter_knomial_factor;
+
+#define SMPI_DEFAULT_KNOMIAL_FACTOR 4
+
 //        int mv2_reduce_knomial_factor = 2;
         
         
@@ -154,6 +158,15 @@ int smpi_coll_tuned_reduce_mvapich2_knomial (
     }
 
 
+    if(mv2_reduce_intra_knomial_factor<0)
+      {
+        mv2_reduce_intra_knomial_factor = SMPI_DEFAULT_KNOMIAL_FACTOR;
+      }
+    if(mv2_reduce_inter_knomial_factor<0)
+      {
+        mv2_reduce_inter_knomial_factor = SMPI_DEFAULT_KNOMIAL_FACTOR;
+      }
+
 
     MPIR_Reduce_knomial_trace(root, mv2_reduce_intra_knomial_factor, comm, 
            &dst, &expected_send_count, &expected_recv_count, &src_array);