src/simix/libsmx.cpp

   1 /* libsmx.c - public interface to simix                                       */
   2 /* --------                                                                   */
   3 /* These functions are the only ones that are visible from the higher levels  */
   4 /* (most of them simply add some documentation to the generated simcall body) */
   5 /*                                                                            */
   6 /* This is somehow the "libc" of SimGrid                                      */
   7
   8 /* Copyright (c) 2010-2018. The SimGrid Team. All rights reserved.            */
   9
  10 /* This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the license (GNU LGPL) which comes with this package. */
  12
  13 #include <cmath>         /* std::isfinite() */
  14
  15 #include <functional>
  16
  17 #include "mc/mc.h"
  18 #include "simgrid/s4u/VirtualMachine.hpp"
  19 #include "simgrid/simix.hpp"
  20 #include "simgrid/simix/blocking_simcall.hpp"
  21 #include "smx_private.hpp"
  22 #include "src/kernel/activity/CommImpl.hpp"
  23 #include "src/kernel/activity/ConditionVariableImpl.hpp"
  24 #include "src/kernel/activity/MutexImpl.hpp"
  25 #include "src/mc/mc_forward.hpp"
  26 #include "src/mc/mc_replay.hpp"
  27 #include "src/plugins/vm/VirtualMachineImpl.hpp"
  28 #include "src/simix/smx_host_private.hpp"
  29 #include "xbt/ex.h"
  30 #include "xbt/functional.hpp"
  31
  32 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix);
  33
  34 #include "popping_bodies.cpp"
  35
  36 void simcall_call(smx_actor_t actor)
  37 {
  38   if (actor != simix_global->maestro_process) {
  39     XBT_DEBUG("Yield actor '%s' on simcall %s (%d)", actor->get_cname(), SIMIX_simcall_name(actor->simcall.call),
  40               (int)actor->simcall.call);
  41     SIMIX_process_yield(actor);
  42   } else {
  43     SIMIX_simcall_handle(&actor->simcall, 0);
  44   }
  45 }
  46
  47 /**
  48  * \ingroup simix_process_management
  49  * \brief Creates a synchro that executes some computation of an host.
  50  *
  51  * This function creates a SURF action and allocates the data necessary
  52  * to create the SIMIX synchro. It can raise a host_error exception if the host crashed.
  53  *
  54  * \param name Name of the execution synchro to create
  55  * \param flops_amount amount Computation amount (in flops)
  56  * \param priority computation priority
  57  * \param bound
  58  * \return A new SIMIX execution synchronization
  59  */
  60 smx_activity_t simcall_execution_start(const char* name, double flops_amount, double priority, double bound,
  61                                        simgrid::s4u::Host* host)
  62 {
  63   /* checking for infinite values */
  64   xbt_assert(std::isfinite(flops_amount), "flops_amount is not finite!");
  65   xbt_assert(std::isfinite(priority), "priority is not finite!");
  66
  67   return simcall_BODY_execution_start(name, flops_amount, priority, bound, host);
  68 }
  69
  70 /**
  71  * \ingroup simix_process_management
  72  * \brief Creates a synchro that may involve parallel computation on
  73  * several hosts and communication between them.
  74  *
  75  * \param name Name of the execution synchro to create
  76  * \param host_nb Number of hosts where the synchro will be executed
  77  * \param host_list Array (of size host_nb) of hosts where the synchro will be executed
  78  * \param flops_amount Array (of size host_nb) of computation amount of hosts (in bytes)
  79  * \param bytes_amount Array (of size host_nb * host_nb) representing the communication
  80  * amount between each pair of hosts
  81  * \param amount the SURF action amount
  82  * \param rate the SURF action rate
  83  * \param timeout timeout
  84  * \return A new SIMIX execution synchronization
  85  */
  86 smx_activity_t simcall_execution_parallel_start(const char* name, int host_nb, sg_host_t* host_list,
  87                                                 double* flops_amount, double* bytes_amount, double rate, double timeout)
  88 {
  89   /* checking for infinite values */
  90   for (int i = 0 ; i < host_nb ; ++i) {
  91     xbt_assert(std::isfinite(flops_amount[i]), "flops_amount[%d] is not finite!", i);
  92     if (bytes_amount != nullptr) {
  93       for (int j = 0 ; j < host_nb ; ++j) {
  94         xbt_assert(std::isfinite(bytes_amount[i + host_nb * j]),
  95                    "bytes_amount[%d+%d*%d] is not finite!", i, host_nb, j);
  96       }
  97     }
  98   }
  99
 100   xbt_assert(std::isfinite(rate), "rate is not finite!");
 101
 102   return simcall_BODY_execution_parallel_start(name, host_nb, host_list, flops_amount, bytes_amount, rate, timeout);
 103 }
 104
 105 /**
 106  * \ingroup simix_process_management
 107  * \brief Cancels an execution synchro.
 108  *
 109  * This functions stops the execution. It calls a surf function.
 110  * \param execution The execution synchro to cancel
 111  */
 112 void simcall_execution_cancel(smx_activity_t execution)
 113 {
 114   simgrid::kernel::activity::ExecImplPtr exec =
 115       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(execution);
 116   if (not exec->surfAction_)
 117     return;
 118   simgrid::simix::kernelImmediate([exec] {
 119     XBT_DEBUG("Cancel synchro %p", exec.get());
 120     if (exec->surfAction_)
 121       exec->surfAction_->cancel();
 122   });
 123 }
 124
 125 /**
 126  * \ingroup simix_process_management
 127  * \brief Changes the priority of an execution synchro.
 128  *
 129  * This functions changes the priority only. It calls a surf function.
 130  * \param execution The execution synchro
 131  * \param priority The new priority
 132  */
 133 void simcall_execution_set_priority(smx_activity_t execution, double priority)
 134 {
 135   /* checking for infinite values */
 136   xbt_assert(std::isfinite(priority), "priority is not finite!");
 137   simgrid::simix::kernelImmediate([execution, priority] {
 138
 139     simgrid::kernel::activity::ExecImplPtr exec =
 140         boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(execution);
 141     if (exec->surfAction_)
 142       exec->surfAction_->set_priority(priority);
 143   });
 144 }
 145
 146 /**
 147  * \ingroup simix_process_management
 148  * \brief Changes the capping (the maximum CPU utilization) of an execution synchro.
 149  *
 150  * This functions changes the capping only. It calls a surf function.
 151  * \param execution The execution synchro
 152  * \param bound The new bound
 153  */
 154 void simcall_execution_set_bound(smx_activity_t execution, double bound)
 155 {
 156   simgrid::simix::kernelImmediate([execution, bound] {
 157     simgrid::kernel::activity::ExecImplPtr exec =
 158         boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(execution);
 159     if (exec->surfAction_)
 160       exec->surfAction_->set_bound(bound);
 161   });
 162 }
 163
 164 /**
 165  * \ingroup simix_host_management
 166  * \brief Waits for the completion of an execution synchro and destroy it.
 167  *
 168  * \param execution The execution synchro
 169  */
 170 e_smx_state_t simcall_execution_wait(smx_activity_t execution)
 171 {
 172   return (e_smx_state_t) simcall_BODY_execution_wait(execution);
 173 }
 174
 175 e_smx_state_t simcall_execution_test(smx_activity_t execution)
 176 {
 177   return (e_smx_state_t)simcall_BODY_execution_test(execution);
 178 }
 179
 180 /**
 181  * \ingroup simix_process_management
 182  * \brief Kills all SIMIX processes.
 183  */
 184 void simcall_process_killall()
 185 {
 186   simcall_BODY_process_killall();
 187 }
 188
 189 /**
 190  * \ingroup simix_process_management
 191  * \brief Cleans up a SIMIX process.
 192  * \param process poor victim (must have already been killed)
 193  */
 194 void simcall_process_cleanup(smx_actor_t process)
 195 {
 196   simcall_BODY_process_cleanup(process);
 197 }
 198
 199 void simcall_process_join(smx_actor_t process, double timeout)
 200 {
 201   simcall_BODY_process_join(process, timeout);
 202 }
 203
 204 /**
 205  * \ingroup simix_process_management
 206  * \brief Suspends a process.
 207  *
 208  * This function suspends the process by suspending the synchro
 209  * it was waiting for completion.
 210  *
 211  * \param process a SIMIX process
 212  */
 213 void simcall_process_suspend(smx_actor_t process)
 214 {
 215   simcall_BODY_process_suspend(process);
 216 }
 217
 218 /**
 219  * \ingroup simix_process_management
 220  * \brief Returns the amount of SIMIX processes in the system
 221  *
 222  * Maestro internal process is not counted, only user code processes are
 223  */
 224 int simcall_process_count()
 225 {
 226   return simgrid::simix::kernelImmediate(SIMIX_process_count);
 227 }
 228
 229 /**
 230  * \ingroup simix_process_management
 231  * \brief Set the user data of a #smx_actor_t.
 232  *
 233  * This functions sets the user data associated to \a process.
 234  * \param process SIMIX process
 235  * \param data User data
 236  */
 237 void simcall_process_set_data(smx_actor_t process, void *data)
 238 {
 239   simgrid::simix::kernelImmediate([process, data] { process->setUserData(data); });
 240 }
 241
 242 /**
 243  * \ingroup simix_process_management
 244  * \brief Set the kill time of a process.
 245  */
 246 void simcall_process_set_kill_time(smx_actor_t process, double kill_time)
 247 {
 248
 249   if (kill_time <= SIMIX_get_clock() || simix_global->kill_process_function == nullptr)
 250     return;
 251   XBT_DEBUG("Set kill time %f for process %s@%s", kill_time, process->get_cname(), process->host->get_cname());
 252   process->kill_timer = SIMIX_timer_set(kill_time, [process] {
 253     simix_global->kill_process_function(process);
 254     process->kill_timer=nullptr;
 255   });
 256 }
 257
 258 /**
 259  * \ingroup simix_process_management
 260  * \brief Add an on_exit function
 261  * Add an on_exit function which will be executed when the process exits/is killed.
 262  */
 263 XBT_PUBLIC void simcall_process_on_exit(smx_actor_t process, int_f_pvoid_pvoid_t fun, void* data)
 264 {
 265   simcall_BODY_process_on_exit(process, fun, data);
 266 }
 267
 268 /**
 269  * \ingroup simix_process_management
 270  * \brief Creates a new sleep SIMIX synchro.
 271  *
 272  * This function creates a SURF action and allocates the data necessary
 273  * to create the SIMIX synchro. It can raise a host_error exception if the
 274  * host crashed. The default SIMIX name of the synchro is "sleep".
 275  *
 276  *   \param duration Time duration of the sleep.
 277  *   \return A result telling whether the sleep was successful
 278  */
 279 e_smx_state_t simcall_process_sleep(double duration)
 280 {
 281   /* checking for infinite values */
 282   xbt_assert(std::isfinite(duration), "duration is not finite!");
 283   return (e_smx_state_t) simcall_BODY_process_sleep(duration);
 284 }
 285
 286 /**
 287  * \ingroup simix_comm_management
 288  */
 289 void simcall_comm_send(smx_actor_t sender, smx_mailbox_t mbox, double task_size, double rate, void* src_buff,
 290                        size_t src_buff_size, int (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
 291                        void (*copy_data_fun)(smx_activity_t, void*, size_t), void* data, double timeout)
 292 {
 293   /* checking for infinite values */
 294   xbt_assert(std::isfinite(task_size), "task_size is not finite!");
 295   xbt_assert(std::isfinite(rate), "rate is not finite!");
 296   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 297
 298   xbt_assert(mbox, "No rendez-vous point defined for send");
 299
 300   if (MC_is_active() || MC_record_replay_is_active()) {
 301     /* the model-checker wants two separate simcalls */
 302     smx_activity_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simcall */
 303     comm = simcall_comm_isend(sender, mbox, task_size, rate,
 304         src_buff, src_buff_size, match_fun, nullptr, copy_data_fun, data, 0);
 305     simcall_comm_wait(comm, timeout);
 306     comm = nullptr;
 307   }
 308   else {
 309     simcall_BODY_comm_send(sender, mbox, task_size, rate, src_buff, src_buff_size,
 310                          match_fun, copy_data_fun, data, timeout);
 311   }
 312 }
 313
 314 /**
 315  * \ingroup simix_comm_management
 316  */
 317 smx_activity_t simcall_comm_isend(smx_actor_t sender, smx_mailbox_t mbox, double task_size, double rate, void* src_buff,
 318                                   size_t src_buff_size,
 319                                   int (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
 320                                   void (*clean_fun)(void*), void (*copy_data_fun)(smx_activity_t, void*, size_t),
 321                                   void* data, int detached)
 322 {
 323   /* checking for infinite values */
 324   xbt_assert(std::isfinite(task_size), "task_size is not finite!");
 325   xbt_assert(std::isfinite(rate), "rate is not finite!");
 326
 327   xbt_assert(mbox, "No rendez-vous point defined for isend");
 328
 329   return simcall_BODY_comm_isend(sender, mbox, task_size, rate, src_buff,
 330                                  src_buff_size, match_fun,
 331                                  clean_fun, copy_data_fun, data, detached);
 332 }
 333
 334 /**
 335  * \ingroup simix_comm_management
 336  */
 337 void simcall_comm_recv(smx_actor_t receiver, smx_mailbox_t mbox, void* dst_buff, size_t* dst_buff_size,
 338                        int (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
 339                        void (*copy_data_fun)(smx_activity_t, void*, size_t), void* data, double timeout, double rate)
 340 {
 341   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 342   xbt_assert(mbox, "No rendez-vous point defined for recv");
 343
 344   if (MC_is_active() || MC_record_replay_is_active()) {
 345     /* the model-checker wants two separate simcalls */
 346     smx_activity_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simcall */
 347     comm = simcall_comm_irecv(receiver, mbox, dst_buff, dst_buff_size,
 348                               match_fun, copy_data_fun, data, rate);
 349     simcall_comm_wait(comm, timeout);
 350     comm = nullptr;
 351   }
 352   else {
 353     simcall_BODY_comm_recv(receiver, mbox, dst_buff, dst_buff_size,
 354                            match_fun, copy_data_fun, data, timeout, rate);
 355   }
 356 }
 357 /**
 358  * \ingroup simix_comm_management
 359  */
 360 smx_activity_t simcall_comm_irecv(smx_actor_t receiver, smx_mailbox_t mbox, void* dst_buff, size_t* dst_buff_size,
 361                                   int (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*),
 362                                   void (*copy_data_fun)(smx_activity_t, void*, size_t), void* data, double rate)
 363 {
 364   xbt_assert(mbox, "No rendez-vous point defined for irecv");
 365
 366   return simcall_BODY_comm_irecv(receiver, mbox, dst_buff, dst_buff_size,
 367                                  match_fun, copy_data_fun, data, rate);
 368 }
 369
 370 /**
 371  * \ingroup simix_comm_management
 372  */
 373 smx_activity_t simcall_comm_iprobe(smx_mailbox_t mbox, int type,
 374                                    int (*match_fun)(void*, void*, simgrid::kernel::activity::CommImpl*), void* data)
 375 {
 376   xbt_assert(mbox, "No rendez-vous point defined for iprobe");
 377
 378   return simcall_BODY_comm_iprobe(mbox, type, match_fun, data);
 379 }
 380
 381 /**
 382  * \ingroup simix_comm_management
 383  */
 384 void simcall_comm_cancel(smx_activity_t synchro)
 385 {
 386   simgrid::simix::kernelImmediate([synchro] {
 387     simgrid::kernel::activity::CommImplPtr comm =
 388         boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
 389     comm->cancel();
 390   });
 391 }
 392
 393 /**
 394  * \ingroup simix_comm_management
 395  */
 396 unsigned int simcall_comm_waitany(xbt_dynar_t comms, double timeout)
 397 {
 398   return simcall_BODY_comm_waitany(comms, timeout);
 399 }
 400
 401 /**
 402  * \ingroup simix_comm_management
 403  */
 404 int simcall_comm_testany(smx_activity_t* comms, size_t count)
 405 {
 406   if (count == 0)
 407     return -1;
 408   return simcall_BODY_comm_testany(comms, count);
 409 }
 410
 411 /**
 412  * \ingroup simix_comm_management
 413  */
 414 void simcall_comm_wait(smx_activity_t comm, double timeout)
 415 {
 416   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 417   simcall_BODY_comm_wait(comm, timeout);
 418 }
 419
 420 /**
 421  * \brief Set the category of an synchro.
 422  *
 423  * This functions changes the category only. It calls a surf function.
 424  * \param synchro The execution synchro
 425  * \param category The tracing category
 426  */
 427 void simcall_set_category(smx_activity_t synchro, const char *category)
 428 {
 429   if (category == nullptr) {
 430     return;
 431   }
 432   simcall_BODY_set_category(synchro, category);
 433 }
 434
 435 /**
 436  * \ingroup simix_comm_management
 437  *
 438  */
 439 int simcall_comm_test(smx_activity_t comm)
 440 {
 441   return simcall_BODY_comm_test(comm);
 442 }
 443
 444 /**
 445  * \ingroup simix_synchro_management
 446  *
 447  */
 448 smx_mutex_t simcall_mutex_init()
 449 {
 450   if (not simix_global) {
 451     fprintf(stderr,"You must run MSG_init before using MSG\n"); // We can't use xbt_die since we may get there before the initialization
 452     xbt_abort();
 453   }
 454   return simgrid::simix::kernelImmediate([] { return new simgrid::kernel::activity::MutexImpl(); });
 455 }
 456
 457 /**
 458  * \ingroup simix_synchro_management
 459  *
 460  */
 461 void simcall_mutex_lock(smx_mutex_t mutex)
 462 {
 463   simcall_BODY_mutex_lock(mutex);
 464 }
 465
 466 /**
 467  * \ingroup simix_synchro_management
 468  *
 469  */
 470 int simcall_mutex_trylock(smx_mutex_t mutex)
 471 {
 472   return simcall_BODY_mutex_trylock(mutex);
 473 }
 474
 475 /**
 476  * \ingroup simix_synchro_management
 477  *
 478  */
 479 void simcall_mutex_unlock(smx_mutex_t mutex)
 480 {
 481   simcall_BODY_mutex_unlock(mutex);
 482 }
 483
 484 /**
 485  * \ingroup simix_synchro_management
 486  *
 487  */
 488 smx_cond_t simcall_cond_init()
 489 {
 490   return simcall_BODY_cond_init();
 491 }
 492
 493 /**
 494  * \ingroup simix_synchro_management
 495  *
 496  */
 497 void simcall_cond_wait(smx_cond_t cond, smx_mutex_t mutex)
 498 {
 499   simcall_BODY_cond_wait(cond, mutex);
 500 }
 501
 502 /**
 503  * \ingroup simix_synchro_management
 504  *
 505  */
 506 void simcall_cond_wait_timeout(smx_cond_t cond, smx_mutex_t mutex, double timeout)
 507 {
 508   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 509   simcall_BODY_cond_wait_timeout(cond, mutex, timeout);
 510 }
 511
 512 /**
 513  * \ingroup simix_synchro_management
 514  *
 515  */
 516 void simcall_sem_acquire(smx_sem_t sem)
 517 {
 518   simcall_BODY_sem_acquire(sem);
 519 }
 520
 521 /**
 522  * \ingroup simix_synchro_management
 523  *
 524  */
 525 void simcall_sem_acquire_timeout(smx_sem_t sem, double timeout)
 526 {
 527   xbt_assert(std::isfinite(timeout), "timeout is not finite!");
 528   simcall_BODY_sem_acquire_timeout(sem, timeout);
 529 }
 530
 531 sg_size_t simcall_storage_read(surf_storage_t st, sg_size_t size)
 532 {
 533   return simcall_BODY_storage_read(st, size);
 534 }
 535
 536 sg_size_t simcall_storage_write(surf_storage_t st, sg_size_t size)
 537 {
 538   return simcall_BODY_storage_write(st, size);
 539 }
 540
 541 void simcall_run_kernel(std::function<void()> const& code)
 542 {
 543   simcall_BODY_run_kernel(&code);
 544 }
 545
 546 void simcall_run_blocking(std::function<void()> const& code)
 547 {
 548   simcall_BODY_run_blocking(&code);
 549 }
 550
 551 int simcall_mc_random(int min, int max) {
 552   return simcall_BODY_mc_random(min, max);
 553 }
 554
 555 /* ************************************************************************** */
 556
 557 /** @brief returns a printable string representing a simcall */
 558 const char *SIMIX_simcall_name(e_smx_simcall_t kind) {
 559   return simcall_names[kind];
 560 }
 561
 562 namespace simgrid {
 563 namespace simix {
 564
 565 void unblock(smx_actor_t process)
 566 {
 567   xbt_assert(SIMIX_is_maestro());
 568   SIMIX_simcall_answer(&process->simcall);
 569 }
 570
 571 }
 572 }