1 /* Copyright (c) 2004-2018. The SimGrid Team. All rights reserved. */
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. */
8 #include "simgrid/s4u/Mailbox.hpp"
9 #include "src/instr/instr_private.hpp"
10 #include "src/kernel/activity/ExecImpl.hpp"
11 #include "src/msg/msg_private.hpp"
12 #include "src/simix/smx_private.hpp" /* MSG_task_listen looks inside the rdv directly. Not clean. */
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "Logging specific to MSG (gos)");
16 /** \ingroup msg_task_usage
17 * \brief Executes a task and waits for its termination.
19 * This function is used for describing the behavior of a process. It takes only one parameter.
20 * \param task a #msg_task_t to execute on the location on which the process is running.
21 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED or #MSG_HOST_FAILURE otherwise
23 msg_error_t MSG_task_execute(msg_task_t task)
25 return MSG_parallel_task_execute(task);
28 /** \ingroup msg_task_usage
29 * \brief Executes a parallel task and waits for its termination.
31 * \param task a #msg_task_t to execute on the location on which the process is running.
33 * \return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
34 * or #MSG_HOST_FAILURE otherwise
36 msg_error_t MSG_parallel_task_execute(msg_task_t task)
38 return MSG_parallel_task_execute_with_timeout(task, -1);
41 msg_error_t MSG_parallel_task_execute_with_timeout(msg_task_t task, double timeout)
43 simdata_task_t simdata = task->simdata;
44 e_smx_state_t comp_state;
45 msg_error_t status = MSG_OK;
47 TRACE_msg_task_execute_start(task);
49 xbt_assert((not simdata->compute) && not task->simdata->isused,
50 "This task is executed somewhere else. Go fix your code!");
52 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
54 if (simdata->flops_amount <= 0.0 && not simdata->host_nb) {
55 TRACE_msg_task_execute_end(task);
62 if (simdata->host_nb > 0) {
64 boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(simcall_execution_parallel_start(
65 task->name, simdata->host_nb, simdata->host_list, simdata->flops_parallel_amount,
66 simdata->bytes_parallel_amount, -1.0, timeout));
67 XBT_DEBUG("Parallel execution action created: %p", simdata->compute.get());
69 simdata->compute = boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(
70 simcall_execution_start(task->name, simdata->flops_amount, simdata->priority, simdata->bound,
71 MSG_process_get_host(MSG_process_self())));
73 simcall_set_category(simdata->compute, task->category);
74 comp_state = simcall_execution_wait(simdata->compute);
76 simdata->setNotUsed();
78 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
83 status = MSG_TASK_CANCELED;
86 status = MSG_HOST_FAILURE;
96 /* action ended, set comm and compute = nullptr, the actions is already destroyed in the main function */
97 simdata->flops_amount = 0.0;
98 simdata->comm = nullptr;
99 simdata->compute = nullptr;
100 TRACE_msg_task_execute_end(task);
105 /** \ingroup msg_task_usage
106 * \brief Sleep for the specified number of seconds
108 * Makes the current process sleep until \a time seconds have elapsed.
110 * \param nb_sec a number of second
112 msg_error_t MSG_process_sleep(double nb_sec)
114 msg_error_t status = MSG_OK;
116 if (TRACE_actor_is_enabled())
117 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->push_event("sleep");
120 simcall_process_sleep(nb_sec);
123 if (e.category == cancel_error) {
124 XBT_DEBUG("According to the JAVA API, a sleep call should only deal with HostFailureException, I'm lost.");
125 // adsein: MSG_TASK_CANCELED is assigned when someone kills the process that made the sleep, this is not
126 // correct. For instance, when the node is turned off, the error should be MSG_HOST_FAILURE, which is by the way
127 // and according to the JAVA document, the only exception that can be triggered by MSG_Process_sleep call.
128 // To avoid possible impacts in the code, I just raised a host_failure exception for the moment in the JAVA code
129 // and did not change anythings at the C level.
130 // See comment in the jmsg_process.c file, function JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
131 status = MSG_TASK_CANCELED;
136 if (TRACE_actor_is_enabled())
137 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->pop_event();
142 /** \ingroup msg_task_usage
143 * \brief Receives a task from a mailbox.
145 * This is a blocking function, the execution flow will be blocked until the task is received. See #MSG_task_irecv
146 * for receiving tasks asynchronously.
148 * \param task a memory location for storing a #msg_task_t.
149 * \param alias name of the mailbox to receive the task from
152 * #MSG_OK if the task was successfully received,
153 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
155 msg_error_t MSG_task_receive(msg_task_t * task, const char *alias)
157 return MSG_task_receive_with_timeout(task, alias, -1);
160 /** \ingroup msg_task_usage
161 * \brief Receives a task from a mailbox at a given rate.
163 * \param task a memory location for storing a #msg_task_t.
164 * \param alias name of the mailbox to receive the task from
165 * \param rate limit the reception to rate bandwidth (byte/sec)
167 * The rate parameter can be used to receive a task with a limited
168 * bandwidth (smaller than the physical available value). Use
169 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
170 * rate value do disable this feature).
173 * #MSG_OK if the task was successfully received,
174 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
176 msg_error_t MSG_task_receive_bounded(msg_task_t * task, const char *alias, double rate)
178 return MSG_task_receive_with_timeout_bounded(task, alias, -1, rate);
181 /** \ingroup msg_task_usage
182 * \brief Receives a task from a mailbox with a given timeout.
184 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
185 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
186 * to obtain an infinite timeout.
188 * \param task a memory location for storing a #msg_task_t.
189 * \param alias name of the mailbox to receive the task from
190 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
193 * #MSG_OK if the task was successfully received,
194 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
196 msg_error_t MSG_task_receive_with_timeout(msg_task_t * task, const char *alias, double timeout)
198 return MSG_task_receive_ext(task, alias, timeout, nullptr);
201 /** \ingroup msg_task_usage
202 * \brief Receives a task from a mailbox with a given timeout and at a given rate.
204 * \param task a memory location for storing a #msg_task_t.
205 * \param alias name of the mailbox to receive the task from
206 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
207 * \param rate limit the reception to rate bandwidth (byte/sec)
209 * The rate parameter can be used to send a task with a limited
210 * bandwidth (smaller than the physical available value). Use
211 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
212 * rate value do disable this feature).
215 * #MSG_OK if the task was successfully received,
216 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
218 msg_error_t MSG_task_receive_with_timeout_bounded(msg_task_t * task, const char *alias, double timeout,double rate)
220 return MSG_task_receive_ext_bounded(task, alias, timeout, nullptr, rate);
223 /** \ingroup msg_task_usage
224 * \brief Receives a task from a mailbox from a specific host with a given timeout.
226 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
227 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
228 * to obtain an infinite timeout.
230 * \param task a memory location for storing a #msg_task_t.
231 * \param alias name of the mailbox to receive the task from
232 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
233 * \param host a #msg_host_t host from where the task was sent
236 * #MSG_OK if the task was successfully received,
237 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
239 msg_error_t MSG_task_receive_ext(msg_task_t * task, const char *alias, double timeout, msg_host_t host)
241 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
242 return MSG_task_receive_ext_bounded(task, alias, timeout, host, -1.0);
245 /** \ingroup msg_task_usage
246 * \brief Receives a task from a mailbox from a specific host with a given timeout and at a given rate.
248 * \param task a memory location for storing a #msg_task_t.
249 * \param alias name of the mailbox to receive the task from
250 * \param timeout is the maximum wait time for completion (provide -1 for no timeout)
251 * \param host a #msg_host_t host from where the task was sent
252 * \param rate limit the reception to rate bandwidth (byte/sec)
254 * The rate parameter can be used to receive a task with a limited
255 * bandwidth (smaller than the physical available value). Use
256 * MSG_task_receive_ext() if you don't limit the rate (or pass -1 as a
257 * rate value do disable this feature).
260 * #MSG_OK if the task was successfully received,
261 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
263 msg_error_t MSG_task_receive_ext_bounded(msg_task_t * task, const char *alias, double timeout, msg_host_t host,
266 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
267 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
268 msg_error_t ret = MSG_OK;
269 /* We no longer support getting a task from a specific host */
273 TRACE_msg_task_get_start();
276 xbt_assert(task, "Null pointer for the task storage");
279 XBT_WARN("Asked to write the received task in a non empty struct -- proceeding.");
281 /* Try to receive it by calling SIMIX network layer */
283 simcall_comm_recv(MSG_process_self()->get_impl(), mailbox->get_impl(), task, nullptr, nullptr, nullptr, nullptr,
285 XBT_DEBUG("Got task %s from %s", (*task)->name, mailbox->get_cname());
286 (*task)->simdata->setNotUsed();
289 switch (e.category) {
292 ret = MSG_HOST_FAILURE;
295 ret = MSG_TRANSFER_FAILURE;
305 if (ret != MSG_HOST_FAILURE && ret != MSG_TRANSFER_FAILURE && ret != MSG_TIMEOUT) {
306 TRACE_msg_task_get_end(*task);
311 /* Internal function used to factorize code between MSG_task_isend(), MSG_task_isend_bounded(), and MSG_task_dsend(). */
312 static inline msg_comm_t MSG_task_isend_internal(msg_task_t task, const char* alias,
313 void_f_pvoid_t cleanup, int detached)
315 simdata_task_t t_simdata = nullptr;
316 msg_process_t myself = MSG_process_self();
317 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
318 TRACE_msg_task_put_start(task);
320 /* Prepare the task to send */
321 t_simdata = task->simdata;
322 t_simdata->sender = myself;
323 t_simdata->source = MSG_host_self();
324 t_simdata->setUsed();
325 t_simdata->comm = nullptr;
326 msg_global->sent_msg++;
328 /* Send it by calling SIMIX network layer */
330 simcall_comm_isend(myself->get_impl(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
331 sizeof(void*), nullptr, cleanup, nullptr, nullptr, detached);
332 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(act);
334 msg_comm_t comm = nullptr;
336 comm = new simgrid::msg::Comm(task, nullptr, act);
339 if (TRACE_is_enabled())
340 simcall_set_category(act, task->category);
341 TRACE_msg_task_put_end();
346 /** \ingroup msg_task_usage
347 * \brief Sends a task on a mailbox.
349 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
351 * \param task a #msg_task_t to send on another location.
352 * \param alias name of the mailbox to sent the task to
353 * \return the msg_comm_t communication created
355 msg_comm_t MSG_task_isend(msg_task_t task, const char *alias)
357 return MSG_task_isend_internal(task, alias, nullptr, 0);
360 /** \ingroup msg_task_usage
361 * \brief Sends a task on a mailbox with a maximum rate
363 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication. The maxrate
364 * parameter allows the application to limit the bandwidth utilization of network links when sending the task.
366 * \param task a #msg_task_t to send on another location.
367 * \param alias name of the mailbox to sent the task to
368 * \param maxrate the maximum communication rate for sending this task (byte/sec).
369 * \return the msg_comm_t communication created
371 msg_comm_t MSG_task_isend_bounded(msg_task_t task, const char *alias, double maxrate)
373 task->simdata->rate = maxrate;
374 return MSG_task_isend_internal(task, alias, nullptr, 0);
377 /** \ingroup msg_task_usage
378 * \brief Sends a task on a mailbox.
380 * This is a non blocking detached send function.
381 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
382 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
383 * usual. More details on this can be obtained on
384 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
385 * in the SimGrid-user mailing list archive.
387 * \param task a #msg_task_t to send on another location.
388 * \param alias name of the mailbox to sent the task to
389 * \param cleanup a function to destroy the task if the communication fails, e.g. MSG_task_destroy
390 * (if nullptr, no function will be called)
392 void MSG_task_dsend(msg_task_t task, const char *alias, void_f_pvoid_t cleanup)
394 msg_comm_t XBT_ATTRIB_UNUSED comm = MSG_task_isend_internal(task, alias, cleanup, 1);
395 xbt_assert(comm == nullptr);
398 /** \ingroup msg_task_usage
399 * \brief Sends a task on a mailbox with a maximal rate.
401 * This is a non blocking detached send function.
402 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
403 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
404 * usual. More details on this can be obtained on
405 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
406 * in the SimGrid-user mailing list archive.
408 * The rate parameter can be used to send a task with a limited
409 * bandwidth (smaller than the physical available value). Use
410 * MSG_task_dsend() if you don't limit the rate (or pass -1 as a rate
411 * value do disable this feature).
413 * \param task a #msg_task_t to send on another location.
414 * \param alias name of the mailbox to sent the task to
415 * \param cleanup a function to destroy the task if the
416 * communication fails, e.g. MSG_task_destroy
417 * (if nullptr, no function will be called)
418 * \param maxrate the maximum communication rate for sending this task (byte/sec)
421 void MSG_task_dsend_bounded(msg_task_t task, const char *alias, void_f_pvoid_t cleanup, double maxrate)
423 task->simdata->rate = maxrate;
424 MSG_task_dsend(task, alias, cleanup);
427 /** \ingroup msg_task_usage
428 * \brief Starts listening for receiving a task from an asynchronous communication.
430 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
432 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
433 * \param name of the mailbox to receive the task on
434 * \return the msg_comm_t communication created
436 msg_comm_t MSG_task_irecv(msg_task_t *task, const char *name)
438 return MSG_task_irecv_bounded(task, name, -1.0);
441 /** \ingroup msg_task_usage
442 * \brief Starts listening for receiving a task from an asynchronous communication at a given rate.
444 * The rate parameter can be used to receive a task with a limited
445 * bandwidth (smaller than the physical available value). Use
446 * MSG_task_irecv() if you don't limit the rate (or pass -1 as a rate
447 * value do disable this feature).
449 * \param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
450 * \param name of the mailbox to receive the task on
451 * \param rate limit the bandwidth to the given rate (byte/sec)
452 * \return the msg_comm_t communication created
454 msg_comm_t MSG_task_irecv_bounded(msg_task_t *task, const char *name, double rate)
456 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(name);
458 /* FIXME: these functions are not traceable */
460 xbt_assert(task, "Null pointer for the task storage");
463 XBT_CRITICAL("MSG_task_irecv() was asked to write in a non empty task struct.");
465 /* Try to receive it by calling SIMIX network layer */
466 msg_comm_t comm = new simgrid::msg::Comm(
468 simcall_comm_irecv(SIMIX_process_self(), mbox->get_impl(), task, nullptr, nullptr, nullptr, nullptr, rate));
473 /** \ingroup msg_task_usage
474 * \brief Checks whether a communication is done, and if yes, finalizes it.
475 * \param comm the communication to test
476 * \return 'true' if the communication is finished
477 * (but it may have failed, use MSG_comm_get_status() to know its status)
478 * or 'false' if the communication is not finished yet
479 * If the status is 'false', don't forget to use MSG_process_sleep() after the test.
481 int MSG_comm_test(msg_comm_t comm)
483 bool finished = false;
486 finished = simcall_comm_test(comm->s_comm);
487 if (finished && comm->task_received != nullptr) {
488 /* I am the receiver */
489 (*comm->task_received)->simdata->setNotUsed();
493 switch (e.category) {
495 comm->status = MSG_TRANSFER_FAILURE;
499 comm->status = MSG_TIMEOUT;
510 /** \ingroup msg_task_usage
511 * \brief This function checks if a communication is finished.
512 * \param comms a vector of communications
513 * \return the position of the finished communication if any
514 * (but it may have failed, use MSG_comm_get_status() to know its status),
515 * or -1 if none is finished
517 int MSG_comm_testany(xbt_dynar_t comms)
519 int finished_index = -1;
521 /* Create the equivalent array with SIMIX objects: */
522 std::vector<simgrid::kernel::activity::ActivityImplPtr> s_comms;
523 s_comms.reserve(xbt_dynar_length(comms));
526 xbt_dynar_foreach(comms, cursor, comm) {
527 s_comms.push_back(comm->s_comm);
530 msg_error_t status = MSG_OK;
532 finished_index = simcall_comm_testany(s_comms.data(), s_comms.size());
535 switch (e.category) {
537 finished_index = e.value;
538 status = MSG_TRANSFER_FAILURE;
541 finished_index = e.value;
542 status = MSG_TIMEOUT;
549 if (finished_index != -1) {
550 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
551 /* the communication is finished */
552 comm->status = status;
554 if (status == MSG_OK && comm->task_received != nullptr) {
555 /* I am the receiver */
556 (*comm->task_received)->simdata->setNotUsed();
560 return finished_index;
563 /** \ingroup msg_task_usage
564 * \brief Destroys a communication.
565 * \param comm the communication to destroy.
567 void MSG_comm_destroy(msg_comm_t comm)
572 /** \ingroup msg_task_usage
573 * \brief Wait for the completion of a communication.
575 * It takes two parameters.
576 * \param comm the communication to wait.
577 * \param timeout Wait until the communication terminates or the timeout occurs.
578 * You can provide a -1 timeout to obtain an infinite timeout.
579 * \return msg_error_t
581 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
584 simcall_comm_wait(comm->s_comm, timeout);
586 if (comm->task_received != nullptr) {
587 /* I am the receiver */
588 (*comm->task_received)->simdata->setNotUsed();
591 /* FIXME: these functions are not traceable */
594 switch (e.category) {
596 comm->status = MSG_TRANSFER_FAILURE;
599 comm->status = MSG_TIMEOUT;
609 /** \ingroup msg_task_usage
610 * \brief This function is called by a sender and permit to wait for each communication
612 * \param comm a vector of communication
613 * \param nb_elem is the size of the comm vector
614 * \param timeout for each call of MSG_comm_wait
616 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
618 for (int i = 0; i < nb_elem; i++)
619 MSG_comm_wait(comm[i], timeout);
622 /** \ingroup msg_task_usage
623 * \brief This function waits for the first communication finished in a list.
624 * \param comms a vector of communications
625 * \return the position of the first finished communication
626 * (but it may have failed, use MSG_comm_get_status() to know its status)
628 int MSG_comm_waitany(xbt_dynar_t comms)
630 int finished_index = -1;
632 /* create the equivalent dynar with SIMIX objects */
633 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_activity_t), [](void*ptr){
634 intrusive_ptr_release(*(simgrid::kernel::activity::ActivityImpl**)ptr);
638 xbt_dynar_foreach(comms, cursor, comm) {
639 intrusive_ptr_add_ref(comm->s_comm.get());
640 xbt_dynar_push_as(s_comms, simgrid::kernel::activity::ActivityImpl*, comm->s_comm.get());
643 msg_error_t status = MSG_OK;
645 finished_index = simcall_comm_waitany(s_comms, -1);
648 switch (e.category) {
650 finished_index = e.value;
651 status = MSG_TRANSFER_FAILURE;
654 finished_index = e.value;
655 status = MSG_TIMEOUT;
662 xbt_assert(finished_index != -1, "WaitAny returned -1");
663 xbt_dynar_free(&s_comms);
665 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
666 /* the communication is finished */
667 comm->status = status;
669 if (comm->task_received != nullptr) {
670 /* I am the receiver */
671 (*comm->task_received)->simdata->setNotUsed();
674 return finished_index;
678 * \ingroup msg_task_usage
679 * \brief Returns the error (if any) that occurred during a finished communication.
680 * \param comm a finished communication
681 * \return the status of the communication, or #MSG_OK if no error occurred
682 * during the communication
684 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
689 /** \ingroup msg_task_usage
690 * \brief Get a task (#msg_task_t) from a communication
692 * \param comm the communication where to get the task
693 * \return the task from the communication
695 msg_task_t MSG_comm_get_task(msg_comm_t comm)
697 xbt_assert(comm, "Invalid parameter");
699 return comm->task_received ? *comm->task_received : comm->task_sent;
703 * \brief This function is called by SIMIX in kernel mode to copy the data of a comm.
704 * \param synchro the comm
705 * \param buff the data copied
706 * \param buff_size size of the buffer
708 void MSG_comm_copy_data_from_SIMIX(smx_activity_t synchro, void* buff, size_t buff_size)
710 simgrid::kernel::activity::CommImplPtr comm =
711 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
713 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
715 // notify the user callback if any
716 if (msg_global->task_copy_callback) {
717 msg_task_t task = static_cast<msg_task_t>(buff);
718 msg_global->task_copy_callback(task, comm->src_proc->ciface(), comm->dst_proc->ciface());
722 /** \ingroup msg_task_usage
723 * \brief Sends a task to a mailbox
725 * This is a blocking function, the execution flow will be blocked until the task is sent (and received on the other
726 * side if #MSG_task_receive is used).
727 * See #MSG_task_isend for sending tasks asynchronously.
729 * \param task the task to be sent
730 * \param alias the mailbox name to where the task is sent
732 * \return Returns #MSG_OK if the task was successfully sent,
733 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
735 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
737 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
738 return MSG_task_send_with_timeout(task, alias, -1);
741 /** \ingroup msg_task_usage
742 * \brief Sends a task to a mailbox with a maximum rate
744 * This is a blocking function, the execution flow will be blocked until the task is sent. The maxrate parameter allows
745 * the application to limit the bandwidth utilization of network links when sending the task.
747 * The maxrate parameter can be used to send a task with a limited
748 * bandwidth (smaller than the physical available value). Use
749 * MSG_task_send() if you don't limit the rate (or pass -1 as a rate
750 * value do disable this feature).
752 * \param task the task to be sent
753 * \param alias the mailbox name to where the task is sent
754 * \param maxrate the maximum communication rate for sending this task (byte/sec)
756 * \return Returns #MSG_OK if the task was successfully sent,
757 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
759 msg_error_t MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
761 task->simdata->rate = maxrate;
762 return MSG_task_send(task, alias);
765 /** \ingroup msg_task_usage
766 * \brief Sends a task to a mailbox with a timeout
768 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
770 * \param task the task to be sent
771 * \param alias the mailbox name to where the task is sent
772 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
774 * \return Returns #MSG_OK if the task was successfully sent,
775 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
777 msg_error_t MSG_task_send_with_timeout(msg_task_t task, const char *alias, double timeout)
779 msg_error_t ret = MSG_OK;
780 simdata_task_t t_simdata = nullptr;
781 msg_process_t process = MSG_process_self();
782 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
784 TRACE_msg_task_put_start(task);
786 /* Prepare the task to send */
787 t_simdata = task->simdata;
788 t_simdata->sender = process;
789 t_simdata->source = MSG_host_self();
791 t_simdata->setUsed();
793 t_simdata->comm = nullptr;
794 msg_global->sent_msg++;
796 /* Try to send it by calling SIMIX network layer */
798 smx_activity_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simix call */
799 comm = simcall_comm_isend(SIMIX_process_self(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
800 sizeof(void*), nullptr, nullptr, nullptr, nullptr, 0);
801 if (TRACE_is_enabled())
802 simcall_set_category(comm, task->category);
803 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(comm);
804 simcall_comm_wait(comm, timeout);
807 switch (e.category) {
809 ret = MSG_HOST_FAILURE;
812 ret = MSG_TRANSFER_FAILURE;
821 /* If the send failed, it is not used anymore */
822 t_simdata->setNotUsed();
825 TRACE_msg_task_put_end();
829 /** \ingroup msg_task_usage
830 * \brief Sends a task to a mailbox with a timeout and with a maximum rate
832 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
834 * The maxrate parameter can be used to send a task with a limited
835 * bandwidth (smaller than the physical available value). Use
836 * MSG_task_send_with_timeout() if you don't limit the rate (or pass -1 as a rate
837 * value do disable this feature).
839 * \param task the task to be sent
840 * \param alias the mailbox name to where the task is sent
841 * \param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
842 * \param maxrate the maximum communication rate for sending this task (byte/sec)
844 * \return Returns #MSG_OK if the task was successfully sent,
845 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
847 msg_error_t MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias, double timeout, double maxrate)
849 task->simdata->rate = maxrate;
850 return MSG_task_send_with_timeout(task, alias, timeout);
853 /** \ingroup msg_task_usage
854 * \brief Look if there is a communication on a mailbox and return the PID of the sender process.
856 * \param alias the name of the mailbox to be considered
858 * \return Returns the PID of sender process,
859 * -1 if there is no communication in the mailbox.
861 int MSG_task_listen_from(const char *alias)
863 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(alias);
864 simgrid::kernel::activity::CommImplPtr comm =
865 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(mbox->front());
870 return MSG_process_get_PID(static_cast<msg_task_t>(comm->src_buff)->simdata->sender);
873 /** \ingroup msg_task_usage
874 * \brief Sets the tracing category of a task.
876 * This function should be called after the creation of a MSG task, to define the category of that task. The
877 * first parameter task must contain a task that was created with the function #MSG_task_create. The second
878 * parameter category must contain a category that was previously declared with the function #TRACE_category
879 * (or with #TRACE_category_with_color).
881 * See \ref outcomes_vizu for details on how to trace the (categorized) resource utilization.
883 * \param task the task that is going to be categorized
884 * \param category the name of the category to be associated to the task
886 * \see MSG_task_get_category, TRACE_category, TRACE_category_with_color
888 void MSG_task_set_category (msg_task_t task, const char *category)
890 TRACE_msg_set_task_category (task, category);
893 /** \ingroup msg_task_usage
895 * \brief Gets the current tracing category of a task.
897 * \param task the task to be considered
899 * \see MSG_task_set_category
901 * \return Returns the name of the tracing category of the given task, nullptr otherwise
903 const char *MSG_task_get_category (msg_task_t task)
905 return task->category;