X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/5b3677b425b9cc6949c1573d59ac772540cbf4b2..cd9affe6152d6bbec19a72ea6fe26ab9407b51b7:/src/smpi/colls/bcast-SMP-linear.c

diff --git a/src/smpi/colls/bcast-SMP-linear.c b/src/smpi/colls/bcast-SMP-linear.c
index 9fafa1bc7c..b3f9b6a630 100644
--- a/src/smpi/colls/bcast-SMP-linear.c
+++ b/src/smpi/colls/bcast-SMP-linear.c
@@ -5,9 +5,6 @@
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "colls_private.h"
-#ifndef NUM_CORE
-#define NUM_CORE 8
-#endif
 
 int bcast_SMP_linear_segment_byte = 8192;
 
@@ -27,15 +24,20 @@ int smpi_coll_tuned_bcast_SMP_linear(void *buf, int count,
 
   rank = smpi_comm_rank(comm);
   size = smpi_comm_size(comm);
-  int num_core = simcall_host_get_core(SIMIX_host_self());
-  // do we use the default one or the number of cores in the platform ?
-  // if the number of cores is one, the platform may be simulated with 1 node = 1 core
-  if (num_core == 1) num_core = NUM_CORE;
-
-  if(size%num_core)
-    THROWF(arg_error,0, "bcast SMP linear can't be used with non multiple of num_core=%d number of processes!",num_core);
+  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));
+  }else{
+    //implementation buggy in this case
+    return smpi_coll_tuned_bcast_mpich( buf , count, datatype,
+              root, comm);
+  }
 
   int segment = bcast_SMP_linear_segment_byte / extent;
+  segment =  segment == 0 ? 1 :segment; 
   int pipe_length = count / segment;
   int remainder = count % segment;
   int increment = segment * extent;