I hate tests in shell.

[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 68c99f5..6e829f8 100644 (file)
--- a/src/smpi/colls/allreduce-smp-binomial-pipeline.c
+++ b/src/smpi/colls/allreduce-smp-binomial-pipeline.c
@@ -46,7 +46,10 @@ 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 = NUM_CORE;
+  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;
 
   comm_size = smpi_comm_size(comm);
   rank = smpi_comm_rank(comm);