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 "smpi_comm.hpp"
19 Instance(const char* name, int max_no_processes, int process_count, MPI_Comm comm, msg_bar_t finalization_barrier)
21 , size(max_no_processes)
22 , present_processes(0)
23 , index(process_count)
25 , finalization_barrier(finalization_barrier)
31 int present_processes;
32 int index; // Badly named. This should be "no_processes_when_registering" ;)
34 msg_bar_t finalization_barrier;
39 extern std::map<std::string, simgrid::s4u::Host*> host_list;
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?
47 extern int* index_to_process_data;
49 /** \ingroup smpi_simulation
50 * \brief Registers a running instance of a MPI program.
52 * FIXME : remove MSG from the loop at some point.
53 * \param name the reference name of the function.
54 * \param code the main mpi function (must have a int ..(int argc, char *argv[])) prototype
55 * \param num_processes the size of the instance we want to deploy
57 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
59 if (code != nullptr) { // When started with smpirun, we will not execute a function
60 SIMIX_function_register(name, code);
63 static int already_called = 0;
64 if (not already_called) {
66 for (auto const& item : simgrid::s4u::host_list) {
67 simgrid::s4u::Host* host = item.second;
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 //get the index of the process in the process_data array
83 void smpi_deployment_register_process(const char* instance_id, int rank, int index)
85 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
86 index_to_process_data[index]=index;
90 Instance& instance = smpi_instances.at(instance_id);
92 instance.present_processes++;
93 index_to_process_data[index] = instance.index + rank;
94 instance.comm_world->group()->set_mapping(index, rank);
97 //get the index of the process in the process_data array
98 MPI_Comm* smpi_deployment_comm_world(const char* instance_id)
100 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
103 Instance& instance = smpi_instances.at(instance_id);
104 return &instance.comm_world;
107 msg_bar_t smpi_deployment_finalization_barrier(const char* instance_id)
109 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
112 Instance& instance = smpi_instances.at(instance_id);
113 return instance.finalization_barrier;
116 void smpi_deployment_cleanup_instances(){
117 for (auto const& item : smpi_instances) {
118 Instance instance = item.second;
119 MSG_barrier_destroy(instance.finalization_barrier);
120 simgrid::smpi::Comm::destroy(instance.comm_world);
122 smpi_instances.clear();