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. */
7 #include "SmpiHost.hpp"
9 #include "simgrid/msg.h" /* barrier */
10 #include "simgrid/s4u/Engine.hpp"
11 #include "smpi_comm.hpp"
20 Instance(const char* name, int max_no_processes, int process_count, MPI_Comm comm, msg_bar_t finalization_barrier)
22 , size(max_no_processes)
23 , present_processes(0)
25 , finalization_barrier(finalization_barrier)
27 int cur_process_count = smpi_process_count();
28 for (int i = 0; i < max_no_processes; i++) {
29 smpi_add_process(cur_process_count + i);
35 int present_processes;
37 msg_bar_t finalization_barrier;
43 using simgrid::smpi::app::Instance;
45 static std::map<std::string, Instance> smpi_instances;
46 extern int process_count; // How many processes have been allocated over all instances?
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 if (code != nullptr) { // When started with smpirun, we will not execute a function
59 SIMIX_function_register(name, code);
62 static int already_called = 0;
63 if (not already_called) {
65 std::vector<simgrid::s4u::Host*> list;
66 simgrid::s4u::Engine::getInstance()->getHostList(&list);
67 for (auto const& host : list) {
68 host->extension_set(new simgrid::smpi::SmpiHost(host));
72 Instance instance(name, num_processes, process_count, MPI_COMM_NULL, MSG_barrier_init(num_processes));
73 MPI_Group group = new simgrid::smpi::Group(instance.size);
74 instance.comm_world = new simgrid::smpi::Comm(group, nullptr);
75 MPI_Attr_put(instance.comm_world, MPI_UNIVERSE_SIZE, reinterpret_cast<void*>(instance.size));
77 process_count+=num_processes;
79 smpi_instances.insert(std::pair<std::string, Instance>(name, instance));
82 void smpi_deployment_register_process(const char* instance_id, int rank, int index)
84 if (smpi_instances.empty()) // no instance registered, we probably used smpirun.
87 Instance& instance = smpi_instances.at(instance_id);
89 instance.present_processes++;
90 instance.comm_world->group()->set_mapping(index, rank);
93 MPI_Comm* smpi_deployment_comm_world(const char* instance_id)
95 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
98 Instance& instance = smpi_instances.at(instance_id);
99 return &instance.comm_world;
102 msg_bar_t smpi_deployment_finalization_barrier(const char* instance_id)
104 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
107 Instance& instance = smpi_instances.at(instance_id);
108 return instance.finalization_barrier;
111 void smpi_deployment_cleanup_instances(){
112 for (auto const& item : smpi_instances) {
113 Instance instance = item.second;
114 MSG_barrier_destroy(instance.finalization_barrier);
115 simgrid::smpi::Comm::destroy(instance.comm_world);
117 smpi_instances.clear();