1 /* Copyright (c) 2004-2019. 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. */
6 #include "simgrid/Exception.hpp"
9 #include "simgrid/s4u/Mailbox.hpp"
10 #include "src/instr/instr_private.hpp"
11 #include "src/kernel/activity/ExecImpl.hpp"
12 #include "src/msg/msg_private.hpp"
13 #include "src/simix/smx_private.hpp" /* MSG_task_listen looks inside the rdv directly. Not clean. */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "Logging specific to MSG (gos)");
18 * @brief Executes a task and waits for its termination.
20 * This function is used for describing the behavior of a process. It takes only one parameter.
21 * @param task a #msg_task_t to execute on the location on which the process is running.
22 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED or #MSG_HOST_FAILURE otherwise
24 msg_error_t MSG_task_execute(msg_task_t task)
26 return MSG_parallel_task_execute(task);
30 * @brief Executes a parallel task and waits for its termination.
32 * @param task a #msg_task_t to execute on the location on which the process is running.
34 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
35 * or #MSG_HOST_FAILURE otherwise
37 msg_error_t MSG_parallel_task_execute(msg_task_t task)
39 return MSG_parallel_task_execute_with_timeout(task, -1);
42 msg_error_t MSG_parallel_task_execute_with_timeout(msg_task_t task, double timeout)
44 simdata_task_t simdata = task->simdata;
45 e_smx_state_t comp_state;
46 msg_error_t status = MSG_OK;
48 TRACE_msg_task_execute_start(task);
50 xbt_assert((not simdata->compute) && not task->simdata->isused,
51 "This task is executed somewhere else. Go fix your code!");
53 XBT_DEBUG("Computing on %s", MSG_process_get_name(MSG_process_self()));
55 if (simdata->flops_amount <= 0.0 && not simdata->host_nb) {
56 TRACE_msg_task_execute_end(task);
63 if (simdata->host_nb > 0) {
65 boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(simcall_execution_parallel_start(
66 task->name ?: "", simdata->host_nb, simdata->host_list, simdata->flops_parallel_amount,
67 simdata->bytes_parallel_amount, -1.0, timeout));
68 XBT_DEBUG("Parallel execution action created: %p", simdata->compute.get());
69 if (task->category != nullptr)
70 simgrid::simix::simcall([task] { task->simdata->compute->set_category(task->category); });
72 sg_host_t host = MSG_process_get_host(MSG_process_self());
73 simdata->compute = simgrid::simix::simcall([task, host] {
74 return simgrid::kernel::activity::ExecImplPtr(
75 new simgrid::kernel::activity::ExecImpl(task->name ?: "", task->category ?: "",
76 /*timeout_detector*/ nullptr, host));
78 /* checking for infinite values */
79 xbt_assert(std::isfinite(simdata->flops_amount), "flops_amount is not finite!");
80 xbt_assert(std::isfinite(simdata->priority), "priority is not finite!");
82 simdata->compute->start(simdata->flops_amount, simdata->priority, simdata->bound);
85 comp_state = simcall_execution_wait(simdata->compute);
87 simdata->setNotUsed();
89 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
90 } catch (simgrid::HostFailureException& e) {
91 status = MSG_HOST_FAILURE;
92 } catch (simgrid::TimeoutError& e) {
95 if (e.category == cancel_error)
96 status = MSG_TASK_CANCELED;
101 /* action ended, set comm and compute = nullptr, the actions is already destroyed in the main function */
102 simdata->flops_amount = 0.0;
103 simdata->comm = nullptr;
104 simdata->compute = nullptr;
105 TRACE_msg_task_execute_end(task);
111 * @brief Sleep for the specified number of seconds
113 * Makes the current process sleep until @a time seconds have elapsed.
115 * @param nb_sec a number of second
117 msg_error_t MSG_process_sleep(double nb_sec)
119 msg_error_t status = MSG_OK;
122 simgrid::s4u::this_actor::sleep_for(nb_sec);
123 } catch (simgrid::HostFailureException& e) {
124 status = MSG_HOST_FAILURE;
125 } catch (xbt_ex& e) {
126 if (e.category == cancel_error) {
127 XBT_DEBUG("According to the JAVA API, a sleep call should only deal with HostFailureException, I'm lost.");
128 // adsein: MSG_TASK_CANCELED is assigned when someone kills the process that made the sleep, this is not
129 // correct. For instance, when the node is turned off, the error should be MSG_HOST_FAILURE, which is by the way
130 // and according to the JAVA document, the only exception that can be triggered by MSG_Process_sleep call.
131 // To avoid possible impacts in the code, I just raised a host_failure exception for the moment in the JAVA code
132 // and did not change anythings at the C level.
133 // 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)
134 status = MSG_TASK_CANCELED;
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);
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);
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);
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);
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);
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();
287 } catch (simgrid::HostFailureException& e) {
288 ret = MSG_HOST_FAILURE;
289 } catch (simgrid::TimeoutError& e) {
291 } catch (xbt_ex& e) {
292 switch (e.category) {
294 ret = MSG_HOST_FAILURE;
297 ret = MSG_TRANSFER_FAILURE;
304 if (ret != MSG_HOST_FAILURE && ret != MSG_TRANSFER_FAILURE && ret != MSG_TIMEOUT) {
305 TRACE_msg_task_get_end(*task);
310 /* Internal function used to factorize code between MSG_task_isend(), MSG_task_isend_bounded(), and MSG_task_dsend(). */
311 static inline msg_comm_t MSG_task_isend_internal(msg_task_t task, const char* alias,
312 void_f_pvoid_t cleanup, int detached)
314 simdata_task_t t_simdata = nullptr;
315 msg_process_t myself = MSG_process_self();
316 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
317 TRACE_msg_task_put_start(task);
319 /* Prepare the task to send */
320 t_simdata = task->simdata;
321 t_simdata->sender = myself;
322 t_simdata->source = MSG_host_self();
323 t_simdata->setUsed();
324 t_simdata->comm = nullptr;
325 msg_global->sent_msg++;
327 /* Send it by calling SIMIX network layer */
329 simcall_comm_isend(myself->get_impl(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
330 sizeof(void*), nullptr, cleanup, nullptr, nullptr, detached);
331 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(act);
333 msg_comm_t comm = nullptr;
335 comm = new simgrid::msg::Comm(task, nullptr, act);
338 if (TRACE_is_enabled() && task->category != nullptr)
339 simgrid::simix::simcall([act, task] { act->set_category(task->category); });
341 TRACE_msg_task_put_end();
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);
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);
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);
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);
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);
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));
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();
491 } catch (simgrid::TimeoutError& e) {
492 comm->status = MSG_TIMEOUT;
496 if (e.category == network_error) {
497 comm->status = MSG_TRANSFER_FAILURE;
508 * @brief This function checks if a communication is finished.
509 * @param comms a vector of communications
510 * @return the position of the finished communication if any
511 * (but it may have failed, use MSG_comm_get_status() to know its status),
512 * or -1 if none is finished
514 int MSG_comm_testany(xbt_dynar_t comms)
516 int finished_index = -1;
518 /* Create the equivalent array with SIMIX objects: */
519 std::vector<simgrid::kernel::activity::ActivityImplPtr> s_comms;
520 s_comms.reserve(xbt_dynar_length(comms));
523 xbt_dynar_foreach(comms, cursor, comm) {
524 s_comms.push_back(comm->s_comm);
527 msg_error_t status = MSG_OK;
529 finished_index = simcall_comm_testany(s_comms.data(), s_comms.size());
530 } catch (simgrid::TimeoutError& e) {
531 finished_index = e.value;
532 status = MSG_TIMEOUT;
535 if (e.category != network_error)
537 finished_index = e.value;
538 status = MSG_TRANSFER_FAILURE;
541 if (finished_index != -1) {
542 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
543 /* the communication is finished */
544 comm->status = status;
546 if (status == MSG_OK && comm->task_received != nullptr) {
547 /* I am the receiver */
548 (*comm->task_received)->simdata->setNotUsed();
552 return finished_index;
555 /** @brief Destroys the provided communication. */
556 void MSG_comm_destroy(msg_comm_t comm)
561 /** @brief Wait for the completion of a communication.
563 * It takes two parameters.
564 * @param comm the communication to wait.
565 * @param timeout Wait until the communication terminates or the timeout occurs.
566 * You can provide a -1 timeout to obtain an infinite timeout.
567 * @return msg_error_t
569 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
572 simcall_comm_wait(comm->s_comm, timeout);
574 if (comm->task_received != nullptr) {
575 /* I am the receiver */
576 (*comm->task_received)->simdata->setNotUsed();
579 /* FIXME: these functions are not traceable */
580 } catch (simgrid::TimeoutError& e) {
581 comm->status = MSG_TIMEOUT;
584 if (e.category == network_error)
585 comm->status = MSG_TRANSFER_FAILURE;
593 /** @brief This function is called by a sender and permit to wait for each communication
595 * @param comm a vector of communication
596 * @param nb_elem is the size of the comm vector
597 * @param timeout for each call of MSG_comm_wait
599 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
601 for (int i = 0; i < nb_elem; i++)
602 MSG_comm_wait(comm[i], timeout);
605 /** @brief This function waits for the first communication finished in a list.
606 * @param comms a vector of communications
607 * @return the position of the first finished communication
608 * (but it may have failed, use MSG_comm_get_status() to know its status)
610 int MSG_comm_waitany(xbt_dynar_t comms)
612 int finished_index = -1;
614 /* create the equivalent dynar with SIMIX objects */
615 xbt_dynar_t s_comms = xbt_dynar_new(sizeof(smx_activity_t), [](void*ptr){
616 intrusive_ptr_release(*(simgrid::kernel::activity::ActivityImpl**)ptr);
620 xbt_dynar_foreach(comms, cursor, comm) {
621 intrusive_ptr_add_ref(comm->s_comm.get());
622 xbt_dynar_push_as(s_comms, simgrid::kernel::activity::ActivityImpl*, comm->s_comm.get());
625 msg_error_t status = MSG_OK;
627 finished_index = simcall_comm_waitany(s_comms, -1);
628 } catch (simgrid::TimeoutError& e) {
629 finished_index = e.value;
630 status = MSG_TIMEOUT;
633 if (e.category == network_error) {
634 finished_index = e.value;
635 status = MSG_TRANSFER_FAILURE;
641 xbt_assert(finished_index != -1, "WaitAny returned -1");
642 xbt_dynar_free(&s_comms);
644 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
645 /* the communication is finished */
646 comm->status = status;
648 if (comm->task_received != nullptr) {
649 /* I am the receiver */
650 (*comm->task_received)->simdata->setNotUsed();
653 return finished_index;
657 * @brief Returns the error (if any) that occurred during a finished communication.
658 * @param comm a finished communication
659 * @return the status of the communication, or #MSG_OK if no error occurred
660 * during the communication
662 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
667 /** @brief Get a task (#msg_task_t) from a communication
669 * @param comm the communication where to get the task
670 * @return the task from the communication
672 msg_task_t MSG_comm_get_task(msg_comm_t comm)
674 xbt_assert(comm, "Invalid parameter");
676 return comm->task_received ? *comm->task_received : comm->task_sent;
680 * @brief This function is called by SIMIX in kernel mode to copy the data of a comm.
681 * @param synchro the comm
682 * @param buff the data copied
683 * @param buff_size size of the buffer
685 void MSG_comm_copy_data_from_SIMIX(smx_activity_t synchro, void* buff, size_t buff_size)
687 simgrid::kernel::activity::CommImplPtr comm =
688 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
690 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
692 // notify the user callback if any
693 if (msg_global->task_copy_callback) {
694 msg_task_t task = static_cast<msg_task_t>(buff);
695 msg_global->task_copy_callback(task, comm->src_actor_->ciface(), comm->dst_actor_->ciface());
700 * @brief Sends a task to a mailbox
702 * This is a blocking function, the execution flow will be blocked until the task is sent (and received on the other
703 * side if #MSG_task_receive is used).
704 * See #MSG_task_isend for sending tasks asynchronously.
706 * @param task the task to be sent
707 * @param alias the mailbox name to where the task is sent
709 * @return Returns #MSG_OK if the task was successfully sent,
710 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
712 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
714 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
715 return MSG_task_send_with_timeout(task, alias, -1);
719 * @brief Sends a task to a mailbox with a maximum rate
721 * This is a blocking function, the execution flow will be blocked until the task is sent. The maxrate parameter allows
722 * the application to limit the bandwidth utilization of network links when sending the task.
724 * The maxrate parameter can be used to send a task with a limited
725 * bandwidth (smaller than the physical available value). Use
726 * MSG_task_send() if you don't limit the rate (or pass -1 as a rate
727 * value do disable this feature).
729 * @param task the task to be sent
730 * @param alias the mailbox name to where the task is sent
731 * @param maxrate the maximum communication rate for sending this task (byte/sec)
733 * @return Returns #MSG_OK if the task was successfully sent,
734 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
736 msg_error_t MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
738 task->simdata->rate = maxrate;
739 return MSG_task_send(task, alias);
743 * @brief Sends a task to a mailbox with a timeout
745 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
747 * @param task the task to be sent
748 * @param alias the mailbox name to where the task is sent
749 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
751 * @return Returns #MSG_OK if the task was successfully sent,
752 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
754 msg_error_t MSG_task_send_with_timeout(msg_task_t task, const char *alias, double timeout)
756 msg_error_t ret = MSG_OK;
757 simdata_task_t t_simdata = nullptr;
758 msg_process_t process = MSG_process_self();
759 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
761 TRACE_msg_task_put_start(task);
763 /* Prepare the task to send */
764 t_simdata = task->simdata;
765 t_simdata->sender = process;
766 t_simdata->source = MSG_host_self();
768 t_simdata->setUsed();
770 t_simdata->comm = nullptr;
771 msg_global->sent_msg++;
773 /* Try to send it by calling SIMIX network layer */
775 smx_activity_t comm = nullptr; /* MC needs the comm to be set to nullptr during the simix call */
776 comm = simcall_comm_isend(SIMIX_process_self(), mailbox->get_impl(), t_simdata->bytes_amount, t_simdata->rate, task,
777 sizeof(void*), nullptr, nullptr, nullptr, nullptr, 0);
778 if (TRACE_is_enabled() && task->category != nullptr)
779 simgrid::simix::simcall([comm, task] { comm->set_category(task->category); });
780 t_simdata->comm = boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(comm);
781 simcall_comm_wait(comm, timeout);
782 } catch (simgrid::TimeoutError& e) {
786 switch (e.category) {
788 ret = MSG_HOST_FAILURE;
791 ret = MSG_TRANSFER_FAILURE;
797 /* If the send failed, it is not used anymore */
798 t_simdata->setNotUsed();
801 TRACE_msg_task_put_end();
806 * @brief Sends a task to a mailbox with a timeout and with a maximum rate
808 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
810 * The maxrate parameter can be used to send a task with a limited
811 * bandwidth (smaller than the physical available value). Use
812 * MSG_task_send_with_timeout() if you don't limit the rate (or pass -1 as a rate
813 * value do disable this feature).
815 * @param task the task to be sent
816 * @param alias the mailbox name to where the task is sent
817 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
818 * @param maxrate the maximum communication rate for sending this task (byte/sec)
820 * @return Returns #MSG_OK if the task was successfully sent,
821 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
823 msg_error_t MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias, double timeout, double maxrate)
825 task->simdata->rate = maxrate;
826 return MSG_task_send_with_timeout(task, alias, timeout);
830 * @brief Look if there is a communication on a mailbox and return the PID of the sender process.
832 * @param alias the name of the mailbox to be considered
834 * @return Returns the PID of sender process,
835 * -1 if there is no communication in the mailbox.
837 int MSG_task_listen_from(const char *alias)
839 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(alias);
840 simgrid::kernel::activity::CommImplPtr comm =
841 boost::static_pointer_cast<simgrid::kernel::activity::CommImpl>(mbox->front());
846 return MSG_process_get_PID(static_cast<msg_task_t>(comm->src_buff_)->simdata->sender);
850 * @brief Sets the tracing category of a task.
852 * This function should be called after the creation of a MSG task, to define the category of that task. The
853 * first parameter task must contain a task that was created with the function #MSG_task_create. The second
854 * parameter category must contain a category that was previously declared with the function #TRACE_category
855 * (or with #TRACE_category_with_color).
857 * See @ref outcomes_vizu for details on how to trace the (categorized) resource utilization.
859 * @param task the task that is going to be categorized
860 * @param category the name of the category to be associated to the task
862 * @see MSG_task_get_category, TRACE_category, TRACE_category_with_color
864 void MSG_task_set_category (msg_task_t task, const char *category)
866 TRACE_msg_set_task_category (task, category);
870 * @brief Gets the current tracing category of a task.
872 * @param task the task to be considered
874 * @see MSG_task_set_category
876 * @return Returns the name of the tracing category of the given task, nullptr otherwise
878 const char *MSG_task_get_category (msg_task_t task)
880 return task->category;