1 /* Copyright (c) 2004-2019. 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 "smpi_host.hpp"
9 #include "simgrid/s4u/Engine.hpp"
10 #include "smpi_comm.hpp"
19 Instance(const std::string name, int max_no_processes, MPI_Comm comm, simgrid::s4u::Barrier* finalization_barrier)
21 , size(max_no_processes)
22 , present_processes(0)
24 , finalization_barrier(finalization_barrier)
27 const std::string name;
29 int present_processes;
31 simgrid::s4u::Barrier* finalization_barrier;
37 using simgrid::smpi::app::Instance;
39 static std::map<std::string, Instance> smpi_instances;
40 extern int process_count; // How many processes have been allocated over all instances?
42 /** @ingroup smpi_simulation
43 * @brief Registers a running instance of a MPI program.
45 * @param name the reference name of the function.
46 * @param code either the main mpi function
47 * (must have a int ..(int argc, char *argv[]) prototype) or nullptr
48 * (if the function deployment is managed somewhere else —
49 * e.g., when deploying manually or using smpirun)
50 * @param num_processes the size of the instance we want to deploy
52 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
54 if (code != nullptr) { // When started with smpirun, we will not execute a function
55 simgrid::s4u::Engine::get_instance()->register_function(name, code);
58 static int already_called = 0;
59 if (not already_called) {
61 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
62 for (auto const& host : list) {
63 host->extension_set(new simgrid::smpi::Host(host));
67 Instance instance(std::string(name), num_processes, MPI_COMM_NULL, new simgrid::s4u::Barrier(num_processes));
68 MPI_Group group = new simgrid::smpi::Group(instance.size);
69 instance.comm_world = new simgrid::smpi::Comm(group, nullptr);
70 // FIXME : using MPI_Attr_put with MPI_UNIVERSE_SIZE is forbidden and we make it a no-op (which triggers a warning as MPI_ERR_ARG is returned).
71 // Directly calling Comm::attr_put breaks for now, as MPI_UNIVERSE_SIZE,is <0
72 // instance.comm_world->attr_put<simgrid::smpi::Comm>(MPI_UNIVERSE_SIZE, reinterpret_cast<void*>(instance.size));
74 process_count+=num_processes;
76 smpi_instances.insert(std::pair<std::string, Instance>(name, instance));
79 void smpi_deployment_register_process(const std::string instance_id, int rank, simgrid::s4u::ActorPtr actor)
81 Instance& instance = smpi_instances.at(instance_id);
83 instance.present_processes++;
84 instance.comm_world->group()->set_mapping(actor, rank);
87 MPI_Comm* smpi_deployment_comm_world(const std::string instance_id)
89 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
92 Instance& instance = smpi_instances.at(instance_id);
93 return &instance.comm_world;
96 simgrid::s4u::Barrier* smpi_deployment_finalization_barrier(const std::string 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.finalization_barrier;
105 void smpi_deployment_cleanup_instances(){
106 for (auto const& item : smpi_instances) {
107 Instance instance = item.second;
108 delete instance.finalization_barrier;
109 simgrid::smpi::Comm::destroy(instance.comm_world);
111 smpi_instances.clear();