1 /* Copyright (c) 2004-2017. 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 "simgrid/msg.h" /* barrier */
9 #include "src/smpi/SmpiHost.hpp"
18 Instance(const char* name, int max_no_processes, int process_count, MPI_Comm comm, msg_bar_t finalization_barrier)
20 , size(max_no_processes)
21 , present_processes(0)
22 , index(process_count)
24 , finalization_barrier(finalization_barrier)
30 int present_processes;
31 int index; // Badly named. This should be "no_processes_when_registering" ;)
33 msg_bar_t finalization_barrier;
38 extern std::map<std::string, simgrid::s4u::Host*> host_list;
42 using simgrid::smpi::app::Instance;
44 static std::map<std::string, Instance> smpi_instances;
45 extern int process_count; // How many processes have been allocated over all instances?
46 extern int* index_to_process_data;
48 /** \ingroup smpi_simulation
49 * \brief Registers a running instance of a MPI program.
51 * FIXME : remove MSG from the loop at some point.
52 * \param name the reference name of the function.
53 * \param code the main mpi function (must have a int ..(int argc, char *argv[])) prototype
54 * \param num_processes the size of the instance we want to deploy
56 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
58 SIMIX_function_register(name, code);
60 static int already_called = 0;
61 if (!already_called) {
63 for (auto& item : simgrid::s4u::host_list) {
64 simgrid::s4u::Host* host = item.second;
65 host->extension_set(new simgrid::smpi::SmpiHost(host));
69 Instance instance(name, num_processes, process_count, MPI_COMM_NULL, MSG_barrier_init(num_processes));
71 process_count+=num_processes;
73 smpi_instances.insert(std::pair<std::string, Instance>(name, instance));
76 //get the index of the process in the process_data array
77 void smpi_deployment_register_process(const char* instance_id, int rank, int index)
79 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
80 index_to_process_data[index]=index;
84 Instance& instance = smpi_instances.at(instance_id);
86 if (instance.comm_world == MPI_COMM_NULL) {
87 MPI_Group group = new simgrid::smpi::Group(instance.size);
88 instance.comm_world = new simgrid::smpi::Comm(group, nullptr);
90 instance.present_processes++;
91 index_to_process_data[index] = instance.index + rank;
92 instance.comm_world->group()->set_mapping(index, rank);
95 //get the index of the process in the process_data array
96 MPI_Comm* smpi_deployment_comm_world(const char* instance_id)
98 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
101 Instance& instance = smpi_instances.at(instance_id);
102 return &instance.comm_world;
105 msg_bar_t smpi_deployment_finalization_barrier(const char* instance_id)
107 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
110 Instance& instance = smpi_instances.at(instance_id);
111 return instance.finalization_barrier;
114 void smpi_deployment_cleanup_instances(){
115 for (auto& item : smpi_instances) {
116 Instance instance = item.second;
117 if (instance.comm_world != MPI_COMM_NULL)
118 delete instance.comm_world->group();
119 delete instance.comm_world;
120 MSG_barrier_destroy(instance.finalization_barrier);