src/smpi/smpi_deployment.cpp

   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 "simgrid/msg.h" /* barrier */
   9 #include "xbt/dict.h"
  10 #include "xbt/log.h"
  11 #include "xbt/sysdep.h"
  12 #include <src/smpi/smpi_group.hpp>
  13
  14 static xbt_dict_t smpi_instances = nullptr;
  15 extern int process_count;
  16 extern int* index_to_process_data;
  17
  18 typedef struct s_smpi_mpi_instance{
  19   const char* name;
  20   int size;
  21   int present_processes;
  22   int index;
  23   MPI_Comm comm_world;
  24   msg_bar_t finalization_barrier;
  25 } s_smpi_mpi_instance_t;
  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 a int ..(int argc, char *argv[])) prototype
  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 = (s_smpi_mpi_instance_t*)xbt_malloc(sizeof(s_smpi_mpi_instance_t));
  40
  41   instance->name = name;
  42   instance->size = num_processes;
  43   instance->present_processes = 0;
  44   instance->index = process_count;
  45   instance->comm_world = MPI_COMM_NULL;
  46   instance->finalization_barrier = MSG_barrier_init(num_processes);
  47
  48   process_count+=num_processes;
  49
  50   if(smpi_instances==nullptr){
  51     smpi_instances = xbt_dict_new_homogeneous(xbt_free_f);
  52   }
  53
  54   xbt_dict_set(smpi_instances, name, (void*)instance, nullptr);
  55 }
  56
  57 //get the index of the process in the process_data array
  58 void smpi_deployment_register_process(const char* instance_id, int rank, int index, MPI_Comm** comm, msg_bar_t* bar)
  59 {
  60
  61   if(smpi_instances==nullptr){//no instance registered, we probably used smpirun.
  62     index_to_process_data[index]=index;
  63     *bar = nullptr;
  64     *comm = nullptr;
  65     return;
  66   }
  67
  68   s_smpi_mpi_instance_t* instance =
  69      static_cast<s_smpi_mpi_instance_t*>(xbt_dict_get_or_null(smpi_instances, instance_id));
  70   xbt_assert(instance, "Error, unknown instance %s", instance_id);
  71
  72   if(instance->comm_world == MPI_COMM_NULL){
  73     MPI_Group group = new simgrid::SMPI::Group(instance->size);
  74     instance->comm_world = new simgrid::SMPI::Comm(group, nullptr);
  75   }
  76   instance->present_processes++;
  77   index_to_process_data[index]=instance->index+rank;
  78   instance->comm_world->group()->set_mapping(index, rank);
  79   *bar = instance->finalization_barrier;
  80   *comm = &instance->comm_world;
  81 }
  82
  83 void smpi_deployment_cleanup_instances(){
  84   xbt_dict_cursor_t cursor = nullptr;
  85   s_smpi_mpi_instance_t* instance = nullptr;
  86   char *name = nullptr;
  87   xbt_dict_foreach(smpi_instances, cursor, name, instance) {
  88     if(instance->comm_world!=MPI_COMM_NULL)
  89       while (instance->comm_world->group()->unuse() > 0);
  90     xbt_free(instance->comm_world);
  91     MSG_barrier_destroy(instance->finalization_barrier);
  92   }
  93   xbt_dict_free(&smpi_instances);
  94 }