- intra_rank = rank % NUM_CORE;
- inter_rank = rank / NUM_CORE;
- int inter_comm_size = (comm_size + NUM_CORE - 1) / NUM_CORE;
- int num_core_in_current_smp = 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;
+
+
+ intra_rank = rank % num_core;
+ inter_rank = rank / num_core;
+ int inter_comm_size = (comm_size + num_core - 1) / num_core;
+ int num_core_in_current_smp = num_core;
+
+ if(comm_size%num_core)
+ THROWF(arg_error,0, "allgather SMP NTS algorithm can't be used with non multiple of NUM_CORE=%d number of processes ! ", num_core);