1 /* Copyright (c) 2004-2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "xbt/sysdep.h"
12 static xbt_dict_t smpi_instances = NULL;
13 extern int process_count;
14 extern int* index_to_process_data;
16 typedef struct s_smpi_mpi_instance{
19 int present_processes;
22 } s_smpi_mpi_instance_t;
25 /** \ingroup smpi_simulation
26 * \brief Registers a running instance of a MPI program.
28 * FIXME : remove MSG from the loop at some point.
29 * \param name the reference name of the function.
30 * \param code the main mpi function (must have the same prototype than the main function of any C program: int ..(int argc, char *argv[]))
31 * \param num_processes the size of the instance we want to deploy
33 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
35 SIMIX_function_register(name, code);
37 s_smpi_mpi_instance_t* instance =
38 (s_smpi_mpi_instance_t*)xbt_malloc(sizeof(s_smpi_mpi_instance_t));
40 instance->name = name;
41 instance->size = num_processes;
42 instance->present_processes = 0;
43 instance->index = process_count;
44 instance->comm_world = MPI_COMM_NULL;
45 process_count+=num_processes;
48 smpi_instances=xbt_dict_new_homogeneous(xbt_free);
51 xbt_dict_set(smpi_instances, name, (void*)instance, NULL);
56 //get the index of the process in the process_data array
57 MPI_Comm* smpi_deployment_register_process(const char* instance_id, int rank, int index){
59 if(!smpi_instances){//no instance registered, we probably used smpirun.
60 index_to_process_data[index]=index;
64 s_smpi_mpi_instance_t* instance = xbt_dict_get_or_null(smpi_instances, instance_id);
66 xbt_die("Error, unknown instance %s", instance_id);
68 if(instance->comm_world == MPI_COMM_NULL){
69 MPI_Group group = smpi_group_new(instance->size);
70 instance->comm_world = smpi_comm_new(group, NULL);
72 instance->present_processes++;
73 index_to_process_data[index]=instance->index+rank;
74 smpi_group_set_mapping(smpi_comm_group(instance->comm_world), index, rank);
75 return & instance->comm_world;