src/smpi/src/smpi_base.c

   1 #include <stdio.h>
   2
   3 #include <signal.h>
   4 #include <sys/time.h>
   5 #include "xbt/xbt_os_time.h"
   6 #include "simix/simix.h"
   7 #include "simix/private.h"
   8 #include "smpi.h"
   9
  10 // FIXME: move globals into structure...
  11
  12 xbt_mallocator_t smpi_request_mallocator      = NULL;
  13 xbt_mallocator_t smpi_message_mallocator      = NULL;
  14
  15 xbt_fifo_t *smpi_pending_send_requests        = NULL;
  16 smx_mutex_t *smpi_pending_send_requests_mutex = NULL;
  17
  18 xbt_fifo_t *smpi_pending_recv_requests        = NULL;
  19 smx_mutex_t *smpi_pending_recv_requests_mutex = NULL;
  20
  21 xbt_fifo_t *smpi_received_messages            = NULL;
  22 smx_mutex_t *smpi_received_messages_mutex     = NULL;
  23
  24 smx_process_t *smpi_sender_processes        = NULL;
  25 smx_process_t *smpi_receiver_processes      = NULL;
  26
  27 int smpi_running_hosts = 0;
  28
  29 smpi_mpi_communicator_t smpi_mpi_comm_world;
  30
  31 smpi_mpi_status_t smpi_mpi_status_ignore;
  32
  33 smpi_mpi_datatype_t smpi_mpi_byte;
  34 smpi_mpi_datatype_t smpi_mpi_int;
  35 smpi_mpi_datatype_t smpi_mpi_double;
  36
  37 smpi_mpi_op_t smpi_mpi_land;
  38 smpi_mpi_op_t smpi_mpi_sum;
  39
  40 static xbt_os_timer_t smpi_timer;
  41 static int smpi_benchmarking;
  42 static double smpi_reference_speed;
  43
  44 // mutexes
  45 smx_mutex_t smpi_running_hosts_mutex = NULL;
  46 smx_mutex_t smpi_benchmarking_mutex  = NULL;
  47 smx_mutex_t init_mutex = NULL;
  48 smx_cond_t init_cond  = NULL;
  49
  50 int smpi_root_ready = 0;
  51 int smpi_ready_count = 0;
  52
  53 XBT_LOG_NEW_DEFAULT_CATEGORY(smpi, "SMPI");
  54
  55 int inline smpi_mpi_comm_size(smpi_mpi_communicator_t *comm)
  56 {
  57         return comm->size;
  58 }
  59
  60 // FIXME: smarter algorithm?
  61 int smpi_mpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
  62 {
  63         int i;
  64
  65         for(i = comm->size - 1; i > 0 && host != comm->hosts[i]; i--);
  66
  67         return i;
  68 }
  69
  70 int inline smpi_mpi_comm_rank_self(smpi_mpi_communicator_t *comm)
  71 {
  72         return smpi_mpi_comm_rank(comm, SIMIX_host_self());
  73 }
  74
  75 int inline smpi_mpi_comm_world_rank_self()
  76 {
  77         return smpi_mpi_comm_rank(&smpi_mpi_comm_world, SIMIX_host_self())
  78 }
  79
  80 int smpi_sender(int argc, char **argv)
  81 {
  82         smx_process_t self;
  83         smx_host_t shost;
  84         int rank;
  85         xbt_fifo_t request_queue;
  86         smx_mutex_t request_queue_mutex;
  87         int size;
  88         int running_hosts = 0;
  89         smpi_mpi_request_t *request;
  90         smx_host_t dhost;
  91         smx_action_t communicate_action;
  92         smpi_received_message_t *scratch;
  93         int drank;
  94         smx_process_t waitproc;
  95
  96         self  = SIMIX_process_self();
  97         shost = SIMIX_host_self();
  98         rank  = smpi_mpi_comm_rank(&smpi_mpi_comm_world, shost);
  99
 100         // make sure root is done before own initialization
 101         SIMIX_mutex_lock(init_mutex);
 102         if (!smpi_root_ready) {
 103                 SIMIX_cond_wait(init_cond, init_mutex);
 104         }
 105         SIMIX_mutex_unlock(init_mutex);
 106
 107         request_queue       = smpi_pending_send_requests[rank];
 108         request_queue_mutex = smpi_pending_send_requests_mutex[rank];
 109
 110         size = smpi_mpi_comm_size(&smpi_mpi_comm_world);
 111
 112         smpi_sender_processes[rank] = self;
 113
 114         // wait for all nodes to signal initializatin complete
 115         SIMIX_mutex_lock(init_mutex);
 116         smpi_ready_count++;
 117         if (smpi_ready_count < 3 * size) {
 118                 SIMIX_cond_wait(init_cond, init_mutex);
 119         } else {
 120                 SIMIX_cond_broadcast(init_cond);
 121         }
 122         SIMIX_mutex_unlock(init_mutex);
 123
 124         SIMIX_mutex_lock(smpi_running_hosts_mutex);
 125         running_hosts = smpi_running_hosts;
 126         SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 127
 128         while (0 < running_hosts) {
 129
 130                 SIMIX_mutex_lock(request_queue_mutex);
 131                 request = xbt_fifo_shift(request_queue);
 132                 SIMIX_mutex_unlock(request_queue_mutex);
 133
 134                 if (NULL == request) {
 135                         SIMIX_process_suspend(self);
 136                 } else {
 137                         SIMIX_mutex_lock(request->mutex);
 138
 139                         dhost = request->comm->hosts[request->dst];
 140
 141                         // FIXME: not at all sure I can assume magic just happens here....
 142                         communicate_action = SIMIX_action_communicate(shost, dhost,
 143                                 "communication", request->datatype->size * request->count * 1.0, -1.0);
 144
 145                         SIMIX_register_condition_to_action(communicate_action, request->cond);
 146                         SIMIX_register_action_to_condition(communicate_action, request->cond);
 147
 148                         SIMIX_cond_wait(request->cond, request->mutex);
 149
 150                         // copy request to appropriate received queue
 151                         scratch = xbt_mallocator_get(smpi_message_mallocator);
 152                         scratch->comm = request->comm;
 153                         scratch->src  = request->src;
 154                         scratch->dst  = request->dst;
 155                         scratch->tag  = request->tag;
 156                         scratch->buf  = request->buf;
 157                         drank = smpi_mpi_comm_rank(&smpi_mpi_comm_world, dhost);
 158                         SIMIX_mutex_lock(smpi_received_messages_mutex[drank]);
 159                         xbt_fifo_push(smpi_received_messages[drank], scratch);
 160                         SIMIX_mutex_unlock(smpi_received_messages_mutex[drank]);
 161
 162                         request->completed = 1;
 163
 164                         // wake up receiver, then any waiting sender
 165                         waitproc = smpi_receiver_processes[drank];
 166
 167                         do {
 168                                 if (SIMIX_process_is_suspended(waitproc)) {
 169                                         SIMIX_process_resume(waitproc);
 170                                 }
 171                         } while(waitproc = xbt_fifo_shift(request->waitlist));
 172
 173                         SIMIX_mutex_unlock(request->mutex);
 174                 }
 175
 176                 SIMIX_mutex_lock(smpi_running_hosts_mutex);
 177                 running_hosts = smpi_running_hosts;
 178                 SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 179         }
 180
 181         return 0;
 182 }
 183
 184 int smpi_receiver(int argc, char **argv)
 185 {
 186         smx_process_t self;
 187         int rank;
 188         xbt_fifo_t request_queue;
 189         smx_mutex_t request_queue_mutex;
 190         xbt_fifo_t message_queue;
 191         smx_mutex_t message_queue_mutex;
 192         int size;
 193         int running_hosts;
 194         xbt_fifo_item_t request_item, message_item;
 195         smpi_mpi_request_t *request;
 196         smpi_received_message_t *message;
 197         smx_process_t waitproc;
 198
 199         self  = SIMIX_process_self();
 200         rank  = smpi_mpi_comm_world_rank_self();
 201
 202         // make sure root is done before own initialization
 203         SIMIX_mutex_lock(init_mutex);
 204         if (!smpi_root_ready) {
 205                 SIMIX_cond_wait(init_cond, init_mutex);
 206         }
 207         SIMIX_mutex_unlock(init_mutex);
 208
 209         request_queue       = smpi_pending_recv_requests[rank];
 210         request_queue_mutex = smpi_pending_recv_requests_mutex[rank];
 211
 212         message_queue       = smpi_received_messages[rank];
 213         message_queue_mutex = smpi_received_messages_mutex[rank];
 214
 215         size = smpi_mpi_comm_size(&smpi_mpi_comm_world);
 216         smpi_receiver_processes[rank] = self;
 217
 218         // wait for all nodes to signal initializatin complete
 219         SIMIX_mutex_lock(init_mutex);
 220         smpi_ready_count++;
 221         if (smpi_ready_count < 3 * size) {
 222                 SIMIX_cond_wait(init_cond, init_mutex);
 223         } else {
 224                 SIMIX_cond_broadcast(init_cond);
 225         }
 226         SIMIX_mutex_unlock(init_mutex);
 227
 228         SIMIX_mutex_lock(smpi_running_hosts_mutex);
 229         running_hosts = smpi_running_hosts;
 230         SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 231
 232         while (0 < running_hosts) {
 233
 234                 // FIXME: better algorithm, maybe some kind of balanced tree? or a heap?
 235
 236                 // FIXME: not the best way to request multiple locks...
 237                 SIMIX_mutex_lock(request_queue_mutex);
 238                 SIMIX_mutex_lock(message_queue_mutex);
 239 search:         for (request_item = xbt_fifo_get_first_item(request_queue);
 240                         NULL != request_item;
 241                         request_item = xbt_fifo_get_next_item(request_item)) {
 242                         request = xbt_fifo_get_item_content(request_item);
 243                         for (message_item = xbt_fifo_get_first_item(message_queue);
 244                                 NULL != message_item;
 245                                 message_item = xbt_fifo_get_next_item(message_item)) {
 246                                 message = xbt_fifo_get_item_content(message_item);
 247                                 if (request->comm == message->comm &&
 248                                                 (MPI_ANY_SOURCE == request->src || request->src == message->src) &&
 249                                                 request->tag == message->tag) {
 250                                         xbt_fifo_remove_item(request_queue, request_item);
 251                                         xbt_fifo_remove_item(message_queue, message_item);
 252                                         break search;
 253                                 }
 254                         }
 255                 }
 256                 SIMIX_mutex_unlock(message_queue_mutex);
 257                 SIMIX_mutex_unlock(request_queue_mutex);
 258
 259                 if (NULL == request || NULL == message) {
 260                         SIMIX_process_suspend(self);
 261                 } else {
 262                         SIMIX_mutex_lock(request->mutex);
 263                         memcpy(request->buf, message->buf, request->count * request->datatype->size);
 264                         request->src = message->src;
 265                         request->completed = 1;
 266
 267                         while (waitproc = xbt_fifo_shift(request->waitlist)) {
 268                                 if (SIMIX_process_is_suspended(waitproc)) {
 269                                         SIMIX_process_resume(waitproc);
 270                                 }
 271                         }
 272                         SIMIX_mutex_unlock(request->mutex);
 273
 274                         xbt_mallocator_release(smpi_message_mallocator, message);
 275                 }
 276
 277                 SIMIX_mutex_lock(smpi_running_hosts_mutex);
 278                 running_hosts = smpi_running_hosts;
 279                 SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 280         }
 281
 282         return 0;
 283 }
 284
 285 int smpi_run_simulation(int argc, char **argv)
 286 {
 287         smx_cond_t   cond           = NULL;
 288         smx_action_t action         = NULL;
 289
 290         xbt_fifo_t   actions_failed = xbt_fifo_new();
 291         xbt_fifo_t   actions_done   = xbt_fifo_new();
 292
 293         srand(SMPI_RAND_SEED);
 294
 295         SIMIX_global_init(&argc, argv);
 296
 297         init_mutex = SIMIX_mutex_init();
 298         init_cond  = SIMIX_cond_init();
 299
 300         SIMIX_function_register("smpi_simulated_main", smpi_simulated_main);
 301         SIMIX_function_register("smpi_sender", smpi_sender);
 302         SIMIX_function_register("smpi_receiver", smpi_receiver);
 303         SIMIX_create_environment(argv[1]);
 304         SIMIX_launch_application(argv[2]);
 305
 306         /* Prepare to display some more info when dying on Ctrl-C pressing */
 307         //signal(SIGINT, inthandler);
 308
 309         /* Clean IO before the run */
 310         fflush(stdout);
 311         fflush(stderr);
 312
 313         while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
 314                 while (action = xbt_fifo_pop(actions_failed)) {
 315                         DEBUG1("** %s failed **", action->name);
 316                         while (cond = xbt_fifo_pop(action->cond_list)) {
 317                                 SIMIX_cond_broadcast(cond);
 318                         }
 319                         SIMIX_action_destroy(action);
 320                 }
 321                 while (action = xbt_fifo_pop(actions_done)) {
 322                         DEBUG1("** %s done **",action->name);
 323                         while (cond = xbt_fifo_pop(action->cond_list)) {
 324                                 SIMIX_cond_broadcast(cond);
 325                         }
 326                         SIMIX_action_destroy(action);
 327                 }
 328         }
 329         xbt_fifo_free(actions_failed);
 330         xbt_fifo_free(actions_done);
 331         INFO1("simulation time %g", SIMIX_get_clock());
 332         SIMIX_clean();
 333         return 0;
 334 }
 335
 336 void smpi_mpi_land_func(void *x, void *y, void *z)
 337 {
 338         *(int *)z = *(int *)x && *(int *)y;
 339 }
 340
 341 void smpi_mpi_sum_func(void *x, void *y, void *z)
 342 {
 343         *(int *)z = *(int *)x + *(int *)y;
 344 }
 345
 346 smpi_mpi_request_t *smpi_new_request()
 347 {
 348         return xbt_new(smpi_mpi_request_t, 1);
 349 }
 350
 351 void smpi_mpi_init()
 352 {
 353         int i;
 354         int size;
 355         smx_process_t process;
 356         smx_host_t *hosts;
 357         smx_host_t host;
 358         double duration;
 359
 360         // initialize some local variables
 361         host  = SIMIX_host_self();
 362         hosts = SIMIX_host_get_table();
 363         size  = SIMIX_host_get_number();
 364
 365         // node 0 sets the globals
 366         if (host == hosts[0]) {
 367
 368                 // processes
 369                 smpi_sender_processes             = xbt_new(smx_process_t, size);
 370                 smpi_receiver_processes           = xbt_new(smx_process_t, size);
 371
 372                 // running hosts
 373                 smpi_running_hosts_mutex          = SIMIX_mutex_init();
 374                 smpi_running_hosts                = size;
 375
 376                 // global communicator
 377                 smpi_mpi_comm_world.size          = size;
 378                 smpi_mpi_comm_world.barrier       = 0;
 379                 smpi_mpi_comm_world.barrier_mutex = SIMIX_mutex_init();
 380                 smpi_mpi_comm_world.barrier_cond  = SIMIX_cond_init();
 381                 smpi_mpi_comm_world.hosts         = hosts;
 382                 smpi_mpi_comm_world.processes     = xbt_new(smx_process_t, size);
 383                 smpi_mpi_comm_world.processes[0]  = SIMIX_process_self();
 384
 385                 // mpi datatypes
 386                 smpi_mpi_byte.size                = (size_t)1;
 387                 smpi_mpi_int.size                 = sizeof(int);
 388                 smpi_mpi_double.size              = sizeof(double);
 389
 390                 // mpi operations
 391                 smpi_mpi_land.func                = &smpi_mpi_land_func;
 392                 smpi_mpi_sum.func                 = &smpi_mpi_sum_func;
 393
 394                 // smpi globals
 395                 smpi_request_mallocator           = xbt_mallocator_new(SMPI_REQUEST_MALLOCATOR_SIZE, smpi_new_request, xbt_free, NULL);
 396                 smpi_message_mallocator           = xbt_mallocator_new(SMPI_MESSAGE_MALLOCATOR_SIZE, smpi_new_message, xbt_free, NULL);
 397                 smpi_pending_send_requests        = xbt_new(xbt_fifo_t,  size);
 398                 smpi_pending_send_requests_mutex  = xbt_new(smx_mutex_t, size);
 399                 smpi_pending_recv_requests        = xbt_new(xbt_fifo_t,  size);
 400                 smpi_pending_recv_requests_mutex  = xbt_new(smx_mutex_t, size);
 401                 smpi_received_messages            = xbt_new(xbt_fifo_t,  size);
 402                 smpi_received_messages_mutex      = xbt_new(smx_mutex_t, size);
 403
 404                 for(i = 0; i < size; i++) {
 405                         smpi_pending_send_requests[i]       = xbt_fifo_new();
 406                         smpi_pending_send_requests_mutex[i] = SIMIX_mutex_init();
 407                         smpi_pending_recv_requests[i]       = xbt_fifo_new();
 408                         smpi_pending_recv_requests_mutex[i] = SIMIX_mutex_init();
 409                         smpi_received_messages[i]           = xbt_fifo_new();
 410                         smpi_received_messages_mutex[i]     = SIMIX_mutex_init();
 411                 }
 412
 413                 smpi_timer                      = xbt_os_timer_new();
 414                 smpi_reference_speed            = SMPI_DEFAULT_SPEED;
 415                 smpi_benchmarking               = 0;
 416                 smpi_benchmarking_mutex         = SIMIX_mutex_init();
 417
 418                 // signal all nodes to perform initialization
 419                 SIMIX_mutex_lock(init_mutex);
 420                 smpi_root_ready = 1;
 421                 SIMIX_cond_broadcast(init_cond);
 422                 SIMIX_mutex_unlock(init_mutex);
 423
 424         } else {
 425
 426                 // make sure root is done before own initialization
 427                 SIMIX_mutex_lock(init_mutex);
 428                 if (!smpi_root_ready) {
 429                         SIMIX_cond_wait(init_cond, init_mutex);
 430                 }
 431                 SIMIX_mutex_unlock(init_mutex);
 432
 433                 smpi_mpi_comm_world.processes[smpi_mpi_comm_rank_self(&smpi_mpi_comm_world)] = SIMIX_process_self();
 434
 435         }
 436
 437         // wait for all nodes to signal initializatin complete
 438         SIMIX_mutex_lock(init_mutex);
 439         smpi_ready_count++;
 440         if (smpi_ready_count < 3 * size) {
 441                 SIMIX_cond_wait(init_cond, init_mutex);
 442         } else {
 443                 SIMIX_cond_broadcast(init_cond);
 444         }
 445         SIMIX_mutex_unlock(init_mutex);
 446
 447 }
 448
 449 void smpi_mpi_finalize()
 450 {
 451         int i;
 452
 453         SIMIX_mutex_lock(smpi_running_hosts_mutex);
 454         i = --smpi_running_hosts;
 455         SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 456
 457         if (0 >= i) {
 458
 459                 SIMIX_mutex_destroy(smpi_running_hosts_mutex);
 460
 461                 for (i = 0 ; i < smpi_mpi_comm_world.size; i++) {
 462                         xbt_fifo_free(smpi_pending_send_requests[i]);
 463                         SIMIX_mutex_destroy(smpi_pending_send_requests_mutex[i]);
 464                         xbt_fifo_free(smpi_pending_recv_requests[i]);
 465                         SIMIX_mutex_destroy(smpi_pending_recv_requests_mutex[i]);
 466                         xbt_fifo_free(smpi_received_messages[i]);
 467                         SIMIX_mutex_destroy(smpi_received_messages_mutex[i]);
 468                 }
 469
 470                 xbt_mallocator_free(smpi_request_mallocator);
 471                 xbt_mallocator_free(smpi_message_mallocator);
 472                 xbt_free(smpi_pending_send_requests);
 473                 xbt_free(smpi_pending_send_requests_mutex);
 474                 xbt_free(smpi_pending_recv_requests);
 475                 xbt_free(smpi_pending_recv_requests_mutex);
 476                 xbt_free(smpi_received_messages);
 477                 xbt_free(smpi_received_messages_mutex);
 478
 479                 SIMIX_mutex_destroy(smpi_mpi_comm_world.barrier_mutex);
 480                 SIMIX_cond_destroy(smpi_mpi_comm_world.barrier_cond);
 481                 xbt_free(smpi_mpi_comm_world.processes);
 482
 483                 xbt_os_timer_free(smpi_timer);
 484         }
 485
 486 }
 487
 488 void smpi_bench_begin()
 489 {
 490         xbt_assert0(!smpi_benchmarking, "Already benchmarking");
 491         smpi_benchmarking = 1;
 492         xbt_os_timer_start(smpi_timer);
 493         return;
 494 }
 495
 496 void smpi_bench_end()
 497 {
 498         double duration;
 499         smx_host_t host;
 500         smx_action_t compute_action;
 501         smx_mutex_t mutex;
 502         smx_cond_t cond;
 503
 504         xbt_assert0(smpi_benchmarking, "Not benchmarking yet");
 505         smpi_benchmarking = 0;
 506         xbt_os_timer_stop(smpi_timer);
 507         duration = xbt_os_timer_elapsed(smpi_timer);
 508         host           = SIMIX_host_self();
 509         compute_action = SIMIX_action_execute(host, "computation", duration * SMPI_DEFAULT_SPEED);
 510         mutex          = SIMIX_mutex_init();
 511         cond           = SIMIX_cond_init();
 512         SIMIX_mutex_lock(mutex);
 513         SIMIX_register_condition_to_action(compute_action, cond);
 514         SIMIX_register_action_to_condition(compute_action, cond);
 515         SIMIX_cond_wait(cond, mutex);
 516         SIMIX_mutex_unlock(mutex);
 517         SIMIX_mutex_destroy(mutex);
 518         SIMIX_cond_destroy(cond);
 519         // FIXME: check for success/failure?
 520         return;
 521 }
 522
 523 void smpi_barrier(smpi_mpi_communicator_t *comm) {
 524         int i;
 525         SIMIX_mutex_lock(comm->barrier_mutex);
 526         comm->barrier++;
 527         if(i < comm->size) {
 528                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 529         } else {
 530                 comm->barrier = 0;
 531                 SIMIX_cond_broadcast(comm->barrier_cond);
 532         }
 533         SIMIX_mutex_unlock(comm->barrier_mutex);
 534 }
 535
 536 int smpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
 537 {
 538         int i;
 539         for(i = 0; i < comm->size && host != comm->hosts[i]; i++);
 540         if (i >= comm->size) i = -1;
 541         return i;
 542 }
 543
 544 int smpi_create_request(void *buf, int count, smpi_mpi_datatype_t *datatype,
 545         int src, int dst, int tag, smpi_mpi_communicator_t *comm, smpi_mpi_request_t **request)
 546 {
 547         int retval = MPI_SUCCESS;
 548
 549         *request = NULL;
 550
 551         if (0 > count) {
 552                 retval = MPI_ERR_COUNT;
 553         } else if (NULL == buf) {
 554                 retval = MPI_ERR_INTERN;
 555         } else if (NULL == datatype) {
 556                 retval = MPI_ERR_TYPE;
 557         } else if (NULL == comm) {
 558                 retval = MPI_ERR_COMM;
 559         } else if (MPI_ANY_SOURCE != src && (0 > src || comm->size <= src)) {
 560                 retval = MPI_ERR_RANK;
 561         } else if (0 > dst || comm->size <= dst) {
 562                 retval = MPI_ERR_RANK;
 563         } else if (0 > tag) {
 564                 retval = MPI_ERR_TAG;
 565         } else {
 566                 *request = xbt_mallocator_get(smpi_request_mallocator);
 567                 (*request)->comm       = comm;
 568                 (*request)->src        = src;
 569                 (*request)->dst        = dst;
 570                 (*request)->tag        = tag;
 571                 (*request)->buf        = buf;
 572                 (*request)->count      = count;
 573                 (*request)->datatype   = datatype;
 574                 (*request)->completed  = 0;
 575                 (*request)->mutex      = SIMIX_mutex_init();
 576                 (*request)->cond       = SIMIX_cond_init();
 577                 (*request)->waitlist   = NULL;
 578         }
 579         return retval;
 580 }
 581
 582 int smpi_isend(smpi_mpi_request_t *request)
 583 {
 584         int rank = smpi_mpi_comm_rank_self(&smpi_mpi_comm_world);
 585
 586         SIMIX_mutex_lock(smpi_pending_send_requests_mutex[rank]);
 587         xbt_fifo_push(smpi_pending_send_requests[rank], request);
 588         SIMIX_mutex_unlock(smpi_pending_send_requests_mutex[rank]);
 589
 590         if (MSG_process_is_suspended(smpi_sender_processes[rank])) {
 591                 MSG_process_resume(smpi_sender_processes[rank]);
 592         }
 593 }
 594
 595 int smpi_irecv(smpi_mpi_request_t *request)
 596 {
 597         int rank = smpi_mpi_comm_rank_self(&smpi_mpi_comm_world);
 598
 599         SIMIX_mutex_lock(smpi_pending_recv_requests_mutex[rank]);
 600         xbt_fifo_push(smpi_pending_recv_requests[rank], request);
 601         SIMIX_mutex_unlock(smpi_pending_recv_requests_mutex[rank]);
 602
 603         if (MSG_process_is_suspended(smpi_receiver_processes[rank])) {
 604                 MSG_process_resume(smpi_receiver_processes[rank]);
 605         }
 606 }
 607
 608 void smpi_wait(smpi_mpi_request_t *request, smpi_mpi_status_t *status)
 609 {
 610         smx_process_t self;
 611         int suspend = 0;
 612         self = SIMIX_process_self();
 613
 614         if (NULL != request) {
 615                 SIMIX_mutex_lock(request->mutex);
 616                 if (!request->completed) {
 617                         xbt_fifo_push(request->waitlist, self);
 618                         suspend = 1;
 619                 }
 620                 SIMIX_mutex_unlock(request->mutex);
 621                 if (suspend) {
 622                         SIMIX_suspend(self);
 623                 }
 624                 if (NULL != status && MPI_STATUS_IGNORE != status) {
 625                         SIMIX_mutex_lock(request->mutex);
 626                         status->MPI_SOURCE = request->src;
 627                         SIMIX_mutex_unlock(request->mutex);
 628                 }
 629         }
 630 }
 631
 632 // FIXME: move into own file
 633 int smpi_gettimeofday(struct timeval *tv, struct timezone *tz)
 634 {
 635         double now;
 636         int retval = 0;
 637         smpi_bench_end();
 638         if (NULL == tv) {
 639                 retval = -1;
 640         } else {
 641                 now = SIMIX_get_clock();
 642                 tv->tv_sec  = now;
 643                 tv->tv_usec = ((now - (double)tv->tv_sec) * 1000000.0);
 644         }
 645         smpi_bench_begin();
 646         return retval;
 647 }
 648
 649 unsigned int smpi_sleep(unsigned int seconds)
 650 {
 651         smx_mutex_t mutex;
 652         smx_cond_t cond;
 653         smx_host_t host;
 654         smx_action_t sleep_action;
 655
 656         smpi_bench_end();
 657         host         = SIMIX_host_self();
 658         sleep_action = SIMIX_action_sleep(host, seconds);
 659         mutex        = SIMIX_mutex_init();
 660         cond         = SIMIX_cond_init();
 661         SIMIX_mutex_lock(mutex);
 662         SIMIX_register_condition_to_action(sleep_action, cond);
 663         SIMIX_register_action_to_condition(sleep_action, cond);
 664         SIMIX_cond_wait(cond, mutex);
 665         SIMIX_mutex_unlock(mutex);
 666         SIMIX_mutex_destroy(mutex);
 667         SIMIX_cond_destroy(cond);
 668         // FIXME: check for success/failure?
 669         smpi_bench_begin();
 670         return 0;
 671 }
 672
 673 void smpi_exit(int status)
 674 {
 675         smpi_bench_end();
 676         SIMIX_mutex_lock(smpi_running_hosts_mutex);
 677         smpi_running_hosts--;
 678         SIMIX_mutex_unlock(smpi_running_hosts_mutex);
 679         SIMIX_process_kill(SIMIX_process_self());
 680         return;
 681 }