int segment = flattree_segment_in_byte / extent;
int pipe_length = count / segment;
int increment = segment * extent;
-
+ if (pipe_length==0) {
+ XBT_WARN("MPI_bcast_flattree_pipeline use default MPI_bcast_flattree.");
+ return smpi_coll_tuned_bcast_flattree(buff, count, data_type, root, comm);
+ }
rank = smpi_comm_rank(comm);
num_procs = smpi_comm_size(comm);