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"
17 static int universe_size = 0;
21 Instance(const std::string& name, int max_no_processes, MPI_Comm comm, simgrid::s4u::Barrier* finalization_barrier)
23 , size(max_no_processes)
24 , present_processes(0)
26 , finalization_barrier(finalization_barrier)
28 MPI_Group group = new simgrid::smpi::Group(size);
29 comm_world = new simgrid::smpi::Comm(group, nullptr, 0, -1);
30 // FIXME : using MPI_Attr_put with MPI_UNIVERSE_SIZE is forbidden and we make it a no-op (which triggers a warning
31 // as MPI_ERR_ARG is returned). Directly calling Comm::attr_put breaks for now, as MPI_UNIVERSE_SIZE,is <0
32 // instance.comm_world->attr_put<simgrid::smpi::Comm>(MPI_UNIVERSE_SIZE, reinterpret_cast<void*>(instance.size));
34 universe_size += max_no_processes;
37 const std::string name;
39 int present_processes;
41 simgrid::s4u::Barrier* finalization_barrier;
47 using simgrid::smpi::app::Instance;
49 static std::map<std::string, Instance> smpi_instances;
51 /** @ingroup smpi_simulation
52 * @brief Registers a running instance of a MPI program.
54 * @param name the reference name of the function.
55 * @param code either the main mpi function
56 * (must have a int ..(int argc, char *argv[]) prototype) or nullptr
57 * (if the function deployment is managed somewhere else —
58 * e.g., when deploying manually or using smpirun)
59 * @param num_processes the size of the instance we want to deploy
61 void SMPI_app_instance_register(const char *name, xbt_main_func_t code, int num_processes)
63 if (code != nullptr) // When started with smpirun, we will not execute a function
64 simgrid::s4u::Engine::get_instance()->register_function(name, code);
66 static bool already_called = false;
67 if (not already_called) {
68 already_called = true;
69 for (auto const& host : simgrid::s4u::Engine::get_instance()->get_all_hosts())
70 host->extension_set(new simgrid::smpi::Host(host));
73 Instance instance(std::string(name), num_processes, MPI_COMM_NULL, new simgrid::s4u::Barrier(num_processes));
75 smpi_instances.insert(std::pair<std::string, Instance>(name, instance));
78 void smpi_deployment_register_process(const std::string& instance_id, int rank, simgrid::s4u::ActorPtr actor)
80 Instance& instance = smpi_instances.at(instance_id);
82 instance.present_processes++;
83 instance.comm_world->group()->set_mapping(actor, rank);
86 MPI_Comm* smpi_deployment_comm_world(const std::string& instance_id)
88 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
91 Instance& instance = smpi_instances.at(instance_id);
92 return &instance.comm_world;
95 simgrid::s4u::Barrier* smpi_deployment_finalization_barrier(const std::string& instance_id)
97 if (smpi_instances.empty()) { // no instance registered, we probably used smpirun.
100 Instance& instance = smpi_instances.at(instance_id);
101 return instance.finalization_barrier;
104 void smpi_deployment_cleanup_instances(){
105 for (auto const& item : smpi_instances) {
106 Instance instance = item.second;
107 delete instance.finalization_barrier;
108 simgrid::smpi::Comm::destroy(instance.comm_world);
110 smpi_instances.clear();
113 int smpi_get_universe_size()
115 return simgrid::smpi::app::universe_size;