src/smpi/smpi_deployment.c

   1 /* Copyright (c) 2004-2014. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 #include "private.h"
   8 #include "xbt/sysdep.h"
   9 #include "xbt/synchro_core.h"
  10 #include "xbt/log.h"
  11 #include "xbt/dict.h"
  12
  13 static xbt_dict_t smpi_instances = NULL;
  14 extern int process_count;
  15 extern int* index_to_process_data;
  16
  17 typedef struct s_smpi_mpi_instance{
  18   const char* name;
  19   int size;
  20   int present_processes;
  21   int index;
  22   MPI_Comm comm_world;
  23   xbt_bar_t finalization_barrier;
  24 } s_smpi_mpi_instance_t;
  25
  26
  27 /** \ingroup smpi_simulation
  28  * \brief Registers a running instance of a MPI program.
  29  *
  30  * FIXME : remove MSG from the loop at some point.
  31  * \param name the reference name of the function.
  32  * \param code the main mpi function (must have the same prototype than the main function of any C program: int ..(int argc, char *argv[]))
  33  * \param num_processes the size of the instance we want to deploy
  34  */
  35 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
  36 {
  37   SIMIX_function_register(name, code);
  38
  39   s_smpi_mpi_instance_t* instance =
  40       (s_smpi_mpi_instance_t*)xbt_malloc(sizeof(s_smpi_mpi_instance_t));
  41
  42   instance->name = name;
  43   instance->size = num_processes;
  44   instance->present_processes = 0;
  45   instance->index = process_count;
  46   instance->comm_world = MPI_COMM_NULL;
  47   instance->finalization_barrier=xbt_barrier_init(num_processes);
  48
  49   process_count+=num_processes;
  50
  51   if(!smpi_instances){
  52     smpi_instances = xbt_dict_new_homogeneous(xbt_free_f);
  53   }
  54
  55   xbt_dict_set(smpi_instances, name, (void*)instance, NULL);
  56   return;
  57 }
  58
  59
  60 //get the index of the process in the process_data array
  61 void smpi_deployment_register_process(const char* instance_id, int rank, int index,MPI_Comm** comm, xbt_bar_t* bar){
  62
  63   if(!smpi_instances){//no instance registered, we probably used smpirun.
  64     index_to_process_data[index]=index;
  65     *bar = NULL;
  66     *comm = NULL;
  67     return;
  68   }
  69
  70   s_smpi_mpi_instance_t* instance = xbt_dict_get_or_null(smpi_instances, instance_id);
  71   if (!instance)
  72     xbt_die("Error, unknown instance %s", instance_id);
  73
  74   if(instance->comm_world == MPI_COMM_NULL){
  75     MPI_Group group = smpi_group_new(instance->size);
  76     instance->comm_world = smpi_comm_new(group, NULL);
  77   }
  78   instance->present_processes++;
  79   index_to_process_data[index]=instance->index+rank;
  80   smpi_group_set_mapping(smpi_comm_group(instance->comm_world), index, rank);
  81   *bar = instance->finalization_barrier;
  82   *comm = &instance->comm_world;
  83   return;
  84 }
  85
  86 void smpi_deployment_cleanup_instances(){
  87   xbt_dict_cursor_t cursor = NULL;
  88   s_smpi_mpi_instance_t* instance = NULL;
  89   char *name = NULL;
  90   xbt_dict_foreach(smpi_instances, cursor, name, instance) {
  91     while (smpi_group_unuse(smpi_comm_group(instance->comm_world)) > 0);
  92     xbt_free(instance->comm_world);
  93     xbt_barrier_destroy(instance->finalization_barrier);
  94   }
  95   xbt_dict_free(&smpi_instances);
  96 }