switch way old SMP aware algos work, to be closer to the ones from mvapich

[simgrid.git] / src / smpi / colls / allreduce-smp-binomial-pipeline.c

diff --git a/src/smpi/colls/allreduce-smp-binomial-pipeline.c b/src/smpi/colls/allreduce-smp-binomial-pipeline.c
index 44dfcb7..e831be9 100644 (file)
--- a/src/smpi/colls/allreduce-smp-binomial-pipeline.c
+++ b/src/smpi/colls/allreduce-smp-binomial-pipeline.c
@@ -12,11 +12,7 @@
    inter-communication
    The communication are done in a pipeline fashion */
 
-/* change number of core per smp-node
-   we assume that number of core per process will be the same for all implementations */
-#ifndef NUM_CORE
-#define NUM_CORE 8
-#endif
+
 
 /* this is a default segment size for pipelining, 
    but it is typically passed as a command line argument */
@@ -52,10 +48,13 @@ int smpi_coll_tuned_allreduce_smp_binomial_pipeline(void *send_buf,
   int tag = COLL_TAG_ALLREDUCE;
   int mask, src, dst;
   MPI_Status status;
-  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(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));
+  }
 
   comm_size = smpi_comm_size(comm);
   rank = smpi_comm_rank(comm);