void smpi_global_init(void)
{
int i;
MPI_Group group;
char name[MAILBOX_NAME_MAXLEN];
int smpirun=0;
if (!MC_is_active()) {
global_timer = xbt_os_timer_new();
xbt_os_walltimer_start(global_timer);
}
if (process_count == 0){
process_count = SIMIX_process_count();
smpirun=1;
}
smpi_universe_size = process_count;
process_data = xbt_new0(smpi_process_data_t, process_count);
for (i = 0; i < process_count; i++) {
process_data[i] = xbt_new(s_smpi_process_data_t, 1);
//process_data[i]->index = i;
process_data[i]->argc = NULL;
process_data[i]->argv = NULL;
process_data[i]->mailbox = simcall_rdv_create(get_mailbox_name(name, i));
process_data[i]->mailbox_small =
simcall_rdv_create(get_mailbox_name_small(name, i));
process_data[i]->mailboxes_mutex = xbt_mutex_init();
process_data[i]->timer = xbt_os_timer_new();
if (MC_is_active())
MC_ignore_heap(process_data[i]->timer, xbt_os_timer_size());
process_data[i]->comm_self = MPI_COMM_NULL;
process_data[i]->comm_intra = MPI_COMM_NULL;
process_data[i]->comm_world = NULL;
process_data[i]->state = SMPI_UNINITIALIZED;
process_data[i]->sampling = 0;
process_data[i]->finalization_barrier = NULL;
}
//if the process was launched through smpirun script
//we generate a global mpi_comm_world
//if not, we let MPI_COMM_NULL, and the comm world
//will be private to each mpi instance
if(smpirun){
group = smpi_group_new(process_count);
MPI_COMM_WORLD = smpi_comm_new(group, NULL);
MPI_Attr_put(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE, (void *)(MPI_Aint)process_count);
xbt_bar_t bar=xbt_barrier_init(process_count);
for (i = 0; i < process_count; i++) {
smpi_group_set_mapping(group, i, i);
process_data[i]->finalization_barrier = bar;
}
}
}
/** \ingroup smpi_simulation
* \brief Registers a running instance of a MPI program.
*
* FIXME : remove MSG from the loop at some point.
* \param name the reference name of the function.
* \param code the main mpi function (must have a int ..(int argc, char *argv[])) prototype
* \param num_processes the size of the instance we want to deploy
*/
void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
{
SIMIX_function_register(name, code);
s_smpi_mpi_instance_t* instance = (s_smpi_mpi_instance_t*)xbt_malloc(sizeof(s_smpi_mpi_instance_t));
instance->name = name;
instance->size = num_processes;
instance->present_processes = 0;
instance->index = process_count;
instance->comm_world = MPI_COMM_NULL;
instance->finalization_barrier=xbt_barrier_init(num_processes);
process_count+=num_processes;
if(smpi_instances==nullptr){
smpi_instances = xbt_dict_new_homogeneous(xbt_free_f);
}
xbt_dict_set(smpi_instances, name, (void*)instance, nullptr);
return;
}
/** @brief Initializes a barrier, with count elements */
msg_bar_t MSG_barrier_init(unsigned int count) {
return (msg_bar_t)xbt_barrier_init(count);
}
