src/smpi/internals/smpi_process.cpp

   1 /* Copyright (c) 2009-2017. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "smpi_process.hpp"
   7 #include "mc/mc.h"
   8 #include "private.hpp"
   9 #include "simgrid/s4u/forward.hpp"
  10 #include "smpi_comm.hpp"
  11 #include "smpi_group.hpp"
  12 #include "src/mc/mc_replay.hpp"
  13 #include "src/msg/msg_private.hpp"
  14 #include "src/simix/smx_private.hpp"
  15 #include <sstream>
  16
  17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_process, smpi, "Logging specific to SMPI (kernel)");
  18
  19 namespace simgrid{
  20 namespace smpi{
  21
  22 using simgrid::s4u::Actor;
  23 using simgrid::s4u::ActorPtr;
  24
  25 Process::Process(ActorPtr actor, msg_bar_t finalization_barrier)
  26     : finalization_barrier_(finalization_barrier), process_(actor)
  27 {
  28   std::stringstream mailboxname;
  29   std::stringstream mailboxname_small;
  30
  31   mailboxname           << std::string("SMPI-")  << process_->getPid();
  32   mailboxname_small     << std::string("small-") << process_->getPid();
  33   mailbox_              = simgrid::s4u::Mailbox::byName(mailboxname.str());
  34   mailbox_small_        = simgrid::s4u::Mailbox::byName(mailboxname_small.str());
  35   mailboxes_mutex_      = xbt_mutex_init();
  36   timer_                = xbt_os_timer_new();
  37   state_                = SMPI_UNINITIALIZED;
  38   if (MC_is_active())
  39     MC_ignore_heap(timer_, xbt_os_timer_size());
  40
  41 #if HAVE_PAPI
  42   if (xbt_cfg_get_string("smpi/papi-events")[0] != '\0') {
  43     // TODO: Implement host/process/thread based counters. This implementation
  44     // just always takes the values passed via "default", like this:
  45     // "default:COUNTER1:COUNTER2:COUNTER3;".
  46     auto it = units2papi_setup.find(papi_default_config_name);
  47     if (it != units2papi_setup.end()) {
  48       papi_event_set_    = it->second.event_set;
  49       papi_counter_data_ = it->second.counter_data;
  50       XBT_DEBUG("Setting PAPI set for process %i", i);
  51     } else {
  52       papi_event_set_ = PAPI_NULL;
  53       XBT_DEBUG("No PAPI set for process %i", i);
  54     }
  55   }
  56 #endif
  57 }
  58
  59 Process::~Process()
  60 {
  61   xbt_os_timer_free(timer_);
  62   xbt_mutex_destroy(mailboxes_mutex_);
  63 }
  64
  65 void Process::set_data(int* argc, char*** argv)
  66 {
  67   instance_id_      = std::string((*argv)[1]);
  68   comm_world_       = smpi_deployment_comm_world(instance_id_.c_str());
  69   msg_bar_t barrier = smpi_deployment_finalization_barrier(instance_id_.c_str());
  70   if (barrier != nullptr) // don't overwrite the current one if the instance has none
  71     finalization_barrier_ = barrier;
  72
  73   process_                                                                  = simgrid::s4u::Actor::self();
  74   static_cast<simgrid::msg::ActorExt*>(process_->getImpl()->userdata)->data = this;
  75
  76   if (*argc > 3) {
  77     memmove(&(*argv)[0], &(*argv)[2], sizeof(char*) * (*argc - 2));
  78     (*argv)[(*argc) - 1] = nullptr;
  79     (*argv)[(*argc) - 2] = nullptr;
  80   }
  81   (*argc) -= 2;
  82   argc_ = argc;
  83   argv_ = argv;
  84   // set the process attached to the mailbox
  85   mailbox_small_->setReceiver(process_);
  86   XBT_DEBUG("<%lu> New process in the game: %p", process_->getPid(), process_.get());
  87 }
  88
  89 /** @brief Prepares the current process for termination. */
  90 void Process::finalize()
  91 {
  92   state_ = SMPI_FINALIZED;
  93   XBT_DEBUG("<%lu> Process left the game", process_->getPid());
  94
  95   // This leads to an explosion of the search graph which cannot be reduced:
  96   if(MC_is_active() || MC_record_replay_is_active())
  97     return;
  98   // wait for all pending asynchronous comms to finish
  99   MSG_barrier_wait(finalization_barrier_);
 100 }
 101
 102 /** @brief Check if a process is finalized */
 103 int Process::finalized()
 104 {
 105   return (state_ == SMPI_FINALIZED);
 106 }
 107
 108 /** @brief Check if a process is initialized */
 109 int Process::initialized()
 110 {
 111   // TODO cheinrich: Check if we still need this. This should be a global condition, not for a
 112   // single process ... ?
 113   return (state_ == SMPI_INITIALIZED);
 114 }
 115
 116 /** @brief Mark a process as initialized (=MPI_Init called) */
 117 void Process::mark_as_initialized()
 118 {
 119   if (state_ != SMPI_FINALIZED)
 120     state_ = SMPI_INITIALIZED;
 121 }
 122
 123 void Process::set_replaying(bool value){
 124   if (state_ != SMPI_FINALIZED)
 125     replaying_ = value;
 126 }
 127
 128 bool Process::replaying(){
 129   return replaying_;
 130 }
 131
 132 void Process::set_user_data(void *data)
 133 {
 134   data_ = data;
 135 }
 136
 137 void *Process::get_user_data()
 138 {
 139   return data_;
 140 }
 141
 142 ActorPtr Process::process(){
 143   return process_;
 144 }
 145
 146 /**
 147  * \brief Returns a structure that stores the location (filename + linenumber) of the last calls to MPI_* functions.
 148  *
 149  * \see smpi_trace_set_call_location
 150  */
 151 smpi_trace_call_location_t* Process::call_location()
 152 {
 153   return &trace_call_loc_;
 154 }
 155
 156 void Process::set_privatized_region(smpi_privatization_region_t region)
 157 {
 158   privatized_region_ = region;
 159 }
 160
 161 smpi_privatization_region_t Process::privatized_region()
 162 {
 163   return privatized_region_;
 164 }
 165
 166 MPI_Comm Process::comm_world()
 167 {
 168   return comm_world_==nullptr ? MPI_COMM_NULL : *comm_world_;
 169 }
 170
 171 smx_mailbox_t Process::mailbox()
 172 {
 173   return mailbox_->getImpl();
 174 }
 175
 176 smx_mailbox_t Process::mailbox_small()
 177 {
 178   return mailbox_small_->getImpl();
 179 }
 180
 181 xbt_mutex_t Process::mailboxes_mutex()
 182 {
 183   return mailboxes_mutex_;
 184 }
 185
 186 #if HAVE_PAPI
 187 int Process::papi_event_set()
 188 {
 189   return papi_event_set_;
 190 }
 191
 192 papi_counter_t& smpi_process_papi_counters()
 193 {
 194   return papi_counter_data_;
 195 }
 196 #endif
 197
 198 xbt_os_timer_t Process::timer()
 199 {
 200   return timer_;
 201 }
 202
 203 void Process::simulated_start()
 204 {
 205   simulated_ = SIMIX_get_clock();
 206 }
 207
 208 double Process::simulated_elapsed()
 209 {
 210   return SIMIX_get_clock() - simulated_;
 211 }
 212
 213 MPI_Comm Process::comm_self()
 214 {
 215   if(comm_self_==MPI_COMM_NULL){
 216     MPI_Group group = new  Group(1);
 217     comm_self_ = new  Comm(group, nullptr);
 218     group->set_mapping(process_, 0);
 219   }
 220   return comm_self_;
 221 }
 222
 223 MPI_Comm Process::comm_intra()
 224 {
 225   return comm_intra_;
 226 }
 227
 228 void Process::set_comm_intra(MPI_Comm comm)
 229 {
 230   comm_intra_ = comm;
 231 }
 232
 233 void Process::set_sampling(int s)
 234 {
 235   sampling_ = s;
 236 }
 237
 238 int Process::sampling()
 239 {
 240   return sampling_;
 241 }
 242
 243 msg_bar_t Process::finalization_barrier(){
 244   return finalization_barrier_;
 245 }
 246
 247 int Process::return_value(){
 248   return return_value_;
 249 }
 250
 251 void Process::set_return_value(int val){
 252   return_value_=val;
 253 }
 254
 255 void Process::init(int *argc, char ***argv){
 256
 257   if (smpi_process_count() == 0) {
 258     xbt_die("SimGrid was not initialized properly before entering MPI_Init. Aborting, please check compilation process and use smpirun\n");
 259   }
 260   if (argc != nullptr && argv != nullptr) {
 261     simgrid::s4u::ActorPtr proc = simgrid::s4u::Actor::self();
 262     proc->getImpl()->context->set_cleanup(&MSG_process_cleanup_from_SIMIX);
 263
 264     char* instance_id = (*argv)[1];
 265     try {
 266       int rank = std::stoi(std::string((*argv)[2]));
 267       smpi_deployment_register_process(instance_id, rank, proc);
 268     } catch (std::invalid_argument& ia) {
 269       throw std::invalid_argument(std::string("Invalid rank: ") + (*argv)[2]);
 270     }
 271
 272     // cheinrich: I'm not sure what the impact of the SMPI_switch_data_segment on this call is. I moved
 273     // this up here so that I can set the privatized region before the switch.
 274     Process* process = smpi_process_remote(proc);
 275     int my_proc_id   = proc->getPid();
 276     if(smpi_privatize_global_variables == SMPI_PRIVATIZE_MMAP){
 277       /* Now using the segment index of this process  */
 278       process->set_privatized_region(smpi_init_global_memory_segment_process());
 279       /* Done at the process's creation */
 280       SMPI_switch_data_segment(my_proc_id);
 281     }
 282
 283     process->set_data(argc, argv);
 284   }
 285   xbt_assert(smpi_process(),
 286       "smpi_process() returned nullptr. You probably gave a nullptr parameter to MPI_Init. "
 287       "Although it's required by MPI-2, this is currently not supported by SMPI.");
 288 }
 289
 290 }
 291 }