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/Comm.hpp"
10 #include "simgrid/s4u/Mailbox.hpp"
11 #include "src/instr/instr_private.hpp"
12 #include "src/kernel/activity/ExecImpl.hpp"
13 #include "src/msg/msg_private.hpp"
14 #include "src/simix/smx_private.hpp" /* MSG_task_listen looks inside the rdv directly. Not clean. */
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_gos, msg, "Logging specific to MSG (gos)");
19 * @brief Executes a task and waits for its termination.
21 * This function is used for describing the behavior of a process. It takes only one parameter.
22 * @param task a #msg_task_t to execute on the location on which the process is running.
23 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED or #MSG_HOST_FAILURE otherwise
25 msg_error_t MSG_task_execute(msg_task_t task)
27 return MSG_parallel_task_execute(task);
31 * @brief Executes a parallel task and waits for its termination.
33 * @param task a #msg_task_t to execute on the location on which the process is running.
35 * @return #MSG_OK if the task was successfully completed, #MSG_TASK_CANCELED
36 * or #MSG_HOST_FAILURE otherwise
38 msg_error_t MSG_parallel_task_execute(msg_task_t task)
40 return MSG_parallel_task_execute_with_timeout(task, -1);
43 msg_error_t MSG_parallel_task_execute_with_timeout(msg_task_t task, double timeout)
45 simdata_task_t simdata = task->simdata;
46 e_smx_state_t comp_state;
47 msg_error_t status = MSG_OK;
49 xbt_assert((not simdata->compute) && not task->simdata->is_used,
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) {
58 if (TRACE_actor_is_enabled())
59 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->push_event("execute");
64 if (simdata->host_nb > 0) {
66 boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(simcall_execution_parallel_start(
67 task->name ?: "", simdata->host_nb, simdata->host_list, simdata->flops_parallel_amount,
68 simdata->bytes_parallel_amount, -1.0, timeout));
69 XBT_DEBUG("Parallel execution action created: %p", simdata->compute.get());
70 if (task->category != nullptr)
71 simgrid::simix::simcall([task] { task->simdata->compute->set_category(task->category); });
73 sg_host_t host = MSG_process_get_host(MSG_process_self());
74 simdata->compute = simgrid::simix::simcall([task, host] {
75 return simgrid::kernel::activity::ExecImplPtr(
76 new simgrid::kernel::activity::ExecImpl(task->name ?: "", task->category ?: "", host));
78 /* checking for infinite values */
79 xbt_assert(std::isfinite(simdata->flops_amount), "flops_amount is not finite!");
81 simdata->compute->start(simdata->flops_amount, simdata->priority, simdata->bound);
84 comp_state = simcall_execution_wait(simdata->compute);
86 simdata->set_not_used();
88 XBT_DEBUG("Execution task '%s' finished in state %d", task->name, (int)comp_state);
89 } catch (simgrid::HostFailureException& e) {
90 status = MSG_HOST_FAILURE;
91 } catch (simgrid::TimeoutError& e) {
93 } catch (simgrid::CancelException& e) {
94 status = MSG_TASK_CANCELED;
97 /* action ended, set comm and compute = nullptr, the actions is already destroyed in the main function */
98 simdata->flops_amount = 0.0;
99 simdata->comm = nullptr;
100 simdata->compute = nullptr;
102 if (TRACE_actor_is_enabled())
103 simgrid::instr::Container::by_name(instr_pid(MSG_process_self()))->get_state("ACTOR_STATE")->pop_event();
109 * @brief Receives a task from a mailbox.
111 * This is a blocking function, the execution flow will be blocked until the task is received. See #MSG_task_irecv
112 * for receiving tasks asynchronously.
114 * @param task a memory location for storing a #msg_task_t.
115 * @param alias name of the mailbox to receive the task from
118 * #MSG_OK if the task was successfully received,
119 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
121 msg_error_t MSG_task_receive(msg_task_t * task, const char *alias)
123 return MSG_task_receive_with_timeout(task, alias, -1);
127 * @brief Receives a task from a mailbox at a given rate.
129 * @param task a memory location for storing a #msg_task_t.
130 * @param alias name of the mailbox to receive the task from
131 * @param rate limit the reception to rate bandwidth (byte/sec)
133 * The rate parameter can be used to receive a task with a limited
134 * bandwidth (smaller than the physical available value). Use
135 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
136 * rate value do disable this feature).
139 * #MSG_OK if the task was successfully received,
140 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
142 msg_error_t MSG_task_receive_bounded(msg_task_t * task, const char *alias, double rate)
144 return MSG_task_receive_with_timeout_bounded(task, alias, -1, rate);
148 * @brief Receives a task from a mailbox with a given timeout.
150 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
151 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
152 * to obtain an infinite timeout.
154 * @param task a memory location for storing a #msg_task_t.
155 * @param alias name of the mailbox to receive the task from
156 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
159 * #MSG_OK if the task was successfully received,
160 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
162 msg_error_t MSG_task_receive_with_timeout(msg_task_t * task, const char *alias, double timeout)
164 return MSG_task_receive_ext(task, alias, timeout, nullptr);
168 * @brief Receives a task from a mailbox with a given timeout and at a given rate.
170 * @param task a memory location for storing a #msg_task_t.
171 * @param alias name of the mailbox to receive the task from
172 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_receive)
173 * @param rate limit the reception to rate bandwidth (byte/sec)
175 * The rate parameter can be used to send a task with a limited
176 * bandwidth (smaller than the physical available value). Use
177 * MSG_task_receive() if you don't limit the rate (or pass -1 as a
178 * rate value do disable this feature).
181 * #MSG_OK if the task was successfully received,
182 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
184 msg_error_t MSG_task_receive_with_timeout_bounded(msg_task_t * task, const char *alias, double timeout,double rate)
186 return MSG_task_receive_ext_bounded(task, alias, timeout, nullptr, rate);
190 * @brief Receives a task from a mailbox from a specific host with a given timeout.
192 * This is a blocking function with a timeout, the execution flow will be blocked until the task is received or the
193 * timeout is achieved. See #MSG_task_irecv for receiving tasks asynchronously. You can provide a -1 timeout
194 * to obtain an infinite timeout.
196 * @param task a memory location for storing a #msg_task_t.
197 * @param alias name of the mailbox to receive the task from
198 * @param timeout is the maximum wait time for completion (provide -1 for no timeout)
199 * @param host a #msg_host_t host from where the task was sent
202 * #MSG_OK if the task was successfully received,
203 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
205 msg_error_t MSG_task_receive_ext(msg_task_t * task, const char *alias, double timeout, msg_host_t host)
207 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
208 return MSG_task_receive_ext_bounded(task, alias, timeout, host, -1.0);
212 * @brief Receives a task from a mailbox from a specific host with a given timeout and at a given rate.
214 * @param task a memory location for storing a #msg_task_t.
215 * @param alias name of the mailbox to receive the task from
216 * @param timeout is the maximum wait time for completion (provide -1 for no timeout)
217 * @param host a #msg_host_t host from where the task was sent
218 * @param rate limit the reception to rate bandwidth (byte/sec)
220 * The rate parameter can be used to receive a task with a limited
221 * bandwidth (smaller than the physical available value). Use
222 * MSG_task_receive_ext() if you don't limit the rate (or pass -1 as a
223 * rate value do disable this feature).
226 * #MSG_OK if the task was successfully received,
227 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
229 msg_error_t MSG_task_receive_ext_bounded(msg_task_t * task, const char *alias, double timeout, msg_host_t host,
232 XBT_DEBUG("MSG_task_receive_ext: Trying to receive a message on mailbox '%s'", alias);
233 msg_error_t ret = MSG_OK;
234 /* We no longer support getting a task from a specific host */
239 xbt_assert(task, "Null pointer for the task storage");
242 XBT_WARN("Asked to write the received task in a non empty struct -- proceeding.");
244 /* Try to receive it by calling SIMIX network layer */
247 simgrid::s4u::Mailbox::by_name(alias)
249 ->set_dst_data(&payload, sizeof(msg_task_t*))
252 *task = static_cast<msg_task_t>(payload);
253 XBT_DEBUG("Got task %s from %s", (*task)->name, alias);
254 (*task)->simdata->set_not_used();
255 } catch (simgrid::HostFailureException& e) {
256 ret = MSG_HOST_FAILURE;
257 } catch (simgrid::TimeoutError& e) {
259 } catch (simgrid::CancelException& e) {
260 ret = MSG_TASK_CANCELED;
261 } catch (xbt_ex& e) {
262 if (e.category == network_error)
263 ret = MSG_TRANSFER_FAILURE;
268 if (TRACE_actor_is_enabled() && ret != MSG_HOST_FAILURE && ret != MSG_TRANSFER_FAILURE && ret != MSG_TIMEOUT) {
269 container_t process_container = simgrid::instr::Container::by_name(instr_pid(MSG_process_self()));
271 std::string key = std::string("p") + std::to_string((*task)->counter);
272 simgrid::instr::Container::get_root()->get_link("ACTOR_TASK_LINK")->end_event(process_container, "SR", key);
277 /* Internal function used to factorize code between MSG_task_isend(), MSG_task_isend_bounded(), and MSG_task_dsend(). */
278 static inline msg_comm_t MSG_task_isend_internal(msg_task_t task, const char* alias, void_f_pvoid_t cleanup,
281 simdata_task_t t_simdata = nullptr;
282 msg_process_t myself = MSG_process_self();
283 simgrid::s4u::MailboxPtr mailbox = simgrid::s4u::Mailbox::by_name(alias);
284 TRACE_msg_task_put_start(task);
286 /* Prepare the task to send */
287 t_simdata = task->simdata;
288 t_simdata->sender = myself;
289 t_simdata->set_used();
290 t_simdata->comm = nullptr;
291 msg_global->sent_msg++;
293 simgrid::s4u::CommPtr comm = mailbox->put_init(task, t_simdata->bytes_amount)->set_rate(t_simdata->rate);
294 t_simdata->comm = comm;
296 comm->detach(cleanup);
300 msg_comm_t msg_comm = nullptr;
302 msg_comm = new simgrid::msg::Comm(task, nullptr, comm);
305 if (TRACE_is_enabled() && task->category != nullptr)
306 simgrid::simix::simcall([comm, task] { comm->get_impl()->set_category(task->category); });
312 * @brief Sends a task on a mailbox.
314 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
316 * @param task a #msg_task_t to send on another location.
317 * @param alias name of the mailbox to sent the task to
318 * @return the msg_comm_t communication created
320 msg_comm_t MSG_task_isend(msg_task_t task, const char *alias)
322 return MSG_task_isend_internal(task, alias, nullptr, false);
326 * @brief Sends a task on a mailbox with a maximum rate
328 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication. The maxrate
329 * parameter allows the application to limit the bandwidth utilization of network links when sending the task.
331 * @param task a #msg_task_t to send on another location.
332 * @param alias name of the mailbox to sent the task to
333 * @param maxrate the maximum communication rate for sending this task (byte/sec).
334 * @return the msg_comm_t communication created
336 msg_comm_t MSG_task_isend_bounded(msg_task_t task, const char *alias, double maxrate)
338 task->simdata->rate = maxrate;
339 return MSG_task_isend_internal(task, alias, nullptr, false);
343 * @brief Sends a task on a mailbox.
345 * This is a non blocking detached send function.
346 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
347 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
348 * usual. More details on this can be obtained on
349 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
350 * in the SimGrid-user mailing list archive.
352 * @param task a #msg_task_t to send on another location.
353 * @param alias name of the mailbox to sent the task to
354 * @param cleanup a function to destroy the task if the communication fails, e.g. MSG_task_destroy
355 * (if nullptr, no function will be called)
357 void MSG_task_dsend(msg_task_t task, const char *alias, void_f_pvoid_t cleanup)
359 msg_comm_t XBT_ATTRIB_UNUSED comm = MSG_task_isend_internal(task, alias, cleanup, true);
360 xbt_assert(comm == nullptr);
364 * @brief Sends a task on a mailbox with a maximal rate.
366 * This is a non blocking detached send function.
367 * Think of it as a best effort send. Keep in mind that the third parameter is only called if the communication fails.
368 * If the communication does work, it is responsibility of the receiver code to free anything related to the task, as
369 * usual. More details on this can be obtained on
370 * <a href="http://lists.gforge.inria.fr/pipermail/simgrid-user/2011-November/002649.html">this thread</a>
371 * in the SimGrid-user mailing list archive.
373 * The rate parameter can be used to send a task with a limited
374 * bandwidth (smaller than the physical available value). Use
375 * MSG_task_dsend() if you don't limit the rate (or pass -1 as a rate
376 * value do disable this feature).
378 * @param task a #msg_task_t to send on another location.
379 * @param alias name of the mailbox to sent the task to
380 * @param cleanup a function to destroy the task if the
381 * communication fails, e.g. MSG_task_destroy
382 * (if nullptr, no function will be called)
383 * @param maxrate the maximum communication rate for sending this task (byte/sec)
386 void MSG_task_dsend_bounded(msg_task_t task, const char *alias, void_f_pvoid_t cleanup, double maxrate)
388 task->simdata->rate = maxrate;
389 MSG_task_dsend(task, alias, cleanup);
393 * @brief Starts listening for receiving a task from an asynchronous communication.
395 * This is a non blocking function: use MSG_comm_wait() or MSG_comm_test() to end the communication.
397 * @param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
398 * @param name of the mailbox to receive the task on
399 * @return the msg_comm_t communication created
401 msg_comm_t MSG_task_irecv(msg_task_t *task, const char *name)
403 return MSG_task_irecv_bounded(task, name, -1.0);
407 * @brief Starts listening for receiving a task from an asynchronous communication at a given rate.
409 * The rate parameter can be used to receive a task with a limited
410 * bandwidth (smaller than the physical available value). Use
411 * MSG_task_irecv() if you don't limit the rate (or pass -1 as a rate
412 * value do disable this feature).
414 * @param task a memory location for storing a #msg_task_t. has to be valid until the end of the communication.
415 * @param name of the mailbox to receive the task on
416 * @param rate limit the bandwidth to the given rate (byte/sec)
417 * @return the msg_comm_t communication created
419 msg_comm_t MSG_task_irecv_bounded(msg_task_t *task, const char *name, double rate)
421 simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::by_name(name);
423 /* FIXME: these functions are not traceable */
425 xbt_assert(task, "Null pointer for the task storage");
428 XBT_CRITICAL("MSG_task_irecv() was asked to write in a non empty task struct.");
430 /* Try to receive it by calling SIMIX network layer */
431 msg_comm_t comm = new simgrid::msg::Comm(
432 nullptr, task, mbox->get_init()->set_dst_data((void**)task, sizeof(msg_task_t*))->set_rate(rate)->start());
438 * @brief Checks whether a communication is done, and if yes, finalizes it.
439 * @param comm the communication to test
440 * @return 'true' if the communication is finished
441 * (but it may have failed, use MSG_comm_get_status() to know its status)
442 * or 'false' if the communication is not finished yet
443 * If the status is 'false', don't forget to use MSG_process_sleep() after the test.
445 int MSG_comm_test(msg_comm_t comm)
447 bool finished = false;
450 finished = comm->s_comm->test();
451 if (finished && comm->task_received != nullptr) {
452 /* I am the receiver */
453 (*comm->task_received)->simdata->set_not_used();
455 } catch (simgrid::TimeoutError& e) {
456 comm->status = MSG_TIMEOUT;
458 } catch (simgrid::CancelException& e) {
459 comm->status = MSG_TASK_CANCELED;
463 if (e.category == network_error) {
464 comm->status = MSG_TRANSFER_FAILURE;
475 * @brief This function checks if a communication is finished.
476 * @param comms a vector of communications
477 * @return the position of the finished communication if any
478 * (but it may have failed, use MSG_comm_get_status() to know its status),
479 * or -1 if none is finished
481 int MSG_comm_testany(xbt_dynar_t comms)
483 int finished_index = -1;
485 /* Create the equivalent array with SIMIX objects: */
486 std::vector<simgrid::kernel::activity::CommImpl*> s_comms;
487 s_comms.reserve(xbt_dynar_length(comms));
490 xbt_dynar_foreach(comms, cursor, comm) {
491 s_comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(comm->s_comm->get_impl().get()));
494 msg_error_t status = MSG_OK;
496 finished_index = simcall_comm_testany(s_comms.data(), s_comms.size());
497 } catch (simgrid::TimeoutError& e) {
498 finished_index = e.value;
499 status = MSG_TIMEOUT;
500 } catch (simgrid::CancelException& e) {
501 finished_index = e.value;
502 status = MSG_TASK_CANCELED;
505 if (e.category != network_error)
507 finished_index = e.value;
508 status = MSG_TRANSFER_FAILURE;
511 if (finished_index != -1) {
512 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
513 /* the communication is finished */
514 comm->status = status;
516 if (status == MSG_OK && comm->task_received != nullptr) {
517 /* I am the receiver */
518 (*comm->task_received)->simdata->set_not_used();
522 return finished_index;
525 /** @brief Destroys the provided communication. */
526 void MSG_comm_destroy(msg_comm_t comm)
531 /** @brief Wait for the completion of a communication.
533 * It takes two parameters.
534 * @param comm the communication to wait.
535 * @param timeout Wait until the communication terminates or the timeout occurs.
536 * You can provide a -1 timeout to obtain an infinite timeout.
537 * @return msg_error_t
539 msg_error_t MSG_comm_wait(msg_comm_t comm, double timeout)
542 comm->s_comm->wait_for(timeout);
544 if (comm->task_received != nullptr) {
545 /* I am the receiver */
546 (*comm->task_received)->simdata->set_not_used();
549 /* FIXME: these functions are not traceable */
550 } catch (simgrid::TimeoutError& e) {
551 comm->status = MSG_TIMEOUT;
552 } catch (simgrid::CancelException& e) {
553 comm->status = MSG_TASK_CANCELED;
556 if (e.category == network_error)
557 comm->status = MSG_TRANSFER_FAILURE;
565 /** @brief This function is called by a sender and permit to wait for each communication
567 * @param comm a vector of communication
568 * @param nb_elem is the size of the comm vector
569 * @param timeout for each call of MSG_comm_wait
571 void MSG_comm_waitall(msg_comm_t * comm, int nb_elem, double timeout)
573 for (int i = 0; i < nb_elem; i++)
574 MSG_comm_wait(comm[i], timeout);
577 /** @brief This function waits for the first communication finished in a list.
578 * @param comms a vector of communications
579 * @return the position of the first finished communication
580 * (but it may have failed, use MSG_comm_get_status() to know its status)
582 int MSG_comm_waitany(xbt_dynar_t comms)
584 int finished_index = -1;
586 /* Create the equivalent array with SIMIX objects: */
587 std::vector<simgrid::kernel::activity::CommImpl*> s_comms;
588 s_comms.reserve(xbt_dynar_length(comms));
591 xbt_dynar_foreach(comms, cursor, comm) {
592 s_comms.push_back(static_cast<simgrid::kernel::activity::CommImpl*>(comm->s_comm->get_impl().get()));
595 msg_error_t status = MSG_OK;
597 finished_index = simcall_comm_waitany(s_comms.data(), s_comms.size(), -1);
598 } catch (simgrid::TimeoutError& e) {
599 finished_index = e.value;
600 status = MSG_TIMEOUT;
601 } catch (simgrid::CancelException& e) {
602 finished_index = e.value;
603 status = MSG_TASK_CANCELED;
606 if (e.category == network_error) {
607 finished_index = e.value;
608 status = MSG_TRANSFER_FAILURE;
614 xbt_assert(finished_index != -1, "WaitAny returned -1");
616 comm = xbt_dynar_get_as(comms, finished_index, msg_comm_t);
617 /* the communication is finished */
618 comm->status = status;
620 if (comm->task_received != nullptr) {
621 /* I am the receiver */
622 (*comm->task_received)->simdata->set_not_used();
625 return finished_index;
629 * @brief Returns the error (if any) that occurred during a finished communication.
630 * @param comm a finished communication
631 * @return the status of the communication, or #MSG_OK if no error occurred
632 * during the communication
634 msg_error_t MSG_comm_get_status(msg_comm_t comm) {
639 /** @brief Get a task (#msg_task_t) from a communication
641 * @param comm the communication where to get the task
642 * @return the task from the communication
644 msg_task_t MSG_comm_get_task(msg_comm_t comm)
646 xbt_assert(comm, "Invalid parameter");
648 return comm->task_received ? *comm->task_received : comm->task_sent;
652 * @brief This function is called by SIMIX in kernel mode to copy the data of a comm.
653 * @param comm the comm
654 * @param buff the data copied
655 * @param buff_size size of the buffer
657 void MSG_comm_copy_data_from_SIMIX(simgrid::kernel::activity::CommImpl* comm, void* buff, size_t buff_size)
659 SIMIX_comm_copy_pointer_callback(comm, buff, buff_size);
661 // notify the user callback if any
662 if (msg_global->task_copy_callback) {
663 msg_task_t task = static_cast<msg_task_t>(buff);
664 msg_global->task_copy_callback(task, comm->src_actor_->ciface(), comm->dst_actor_->ciface());
669 * @brief Sends a task to a mailbox
671 * This is a blocking function, the execution flow will be blocked until the task is sent (and received on the other
672 * side if #MSG_task_receive is used).
673 * See #MSG_task_isend for sending tasks asynchronously.
675 * @param task the task to be sent
676 * @param alias the mailbox name to where the task is sent
678 * @return Returns #MSG_OK if the task was successfully sent,
679 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
681 msg_error_t MSG_task_send(msg_task_t task, const char *alias)
683 XBT_DEBUG("MSG_task_send: Trying to send a message on mailbox '%s'", alias);
684 return MSG_task_send_with_timeout(task, alias, -1);
688 * @brief Sends a task to a mailbox with a maximum rate
690 * This is a blocking function, the execution flow will be blocked until the task is sent. The maxrate parameter allows
691 * the application to limit the bandwidth utilization of network links when sending the task.
693 * The maxrate parameter can be used to send a task with a limited
694 * bandwidth (smaller than the physical available value). Use
695 * MSG_task_send() if you don't limit the rate (or pass -1 as a rate
696 * value do disable this feature).
698 * @param task the task to be sent
699 * @param alias the mailbox name to where the task is sent
700 * @param maxrate the maximum communication rate for sending this task (byte/sec)
702 * @return Returns #MSG_OK if the task was successfully sent,
703 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
705 msg_error_t MSG_task_send_bounded(msg_task_t task, const char *alias, double maxrate)
707 task->simdata->rate = maxrate;
708 return MSG_task_send(task, alias);
712 * @brief Sends a task to a mailbox with a timeout
714 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
716 * @param task the task to be sent
717 * @param alias the mailbox name to where the task is sent
718 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
720 * @return Returns #MSG_OK if the task was successfully sent,
721 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
723 msg_error_t MSG_task_send_with_timeout(msg_task_t task, const char *alias, double timeout)
725 msg_error_t ret = MSG_OK;
727 TRACE_msg_task_put_start(task);
729 /* Prepare the task to send */
730 simdata_task_t t_simdata = task->simdata;
731 t_simdata->sender = MSG_process_self();
732 t_simdata->set_used();
734 msg_global->sent_msg++;
738 simgrid::s4u::CommPtr comm =
739 simgrid::s4u::Mailbox::by_name(alias)->put_init(task, t_simdata->bytes_amount)->set_rate(t_simdata->rate);
740 t_simdata->comm = comm;
742 if (TRACE_is_enabled() && task->category != nullptr)
743 simgrid::simix::simcall([comm, task] { comm->get_impl()->set_category(task->category); });
744 comm->wait_for(timeout);
745 } catch (simgrid::TimeoutError& e) {
747 } catch (simgrid::CancelException& e) {
748 ret = MSG_HOST_FAILURE;
749 } catch (xbt_ex& e) {
750 if (e.category == network_error)
751 ret = MSG_TRANSFER_FAILURE;
755 /* If the send failed, it is not used anymore */
756 t_simdata->set_not_used();
763 * @brief Sends a task to a mailbox with a timeout and with a maximum rate
765 * This is a blocking function, the execution flow will be blocked until the task is sent or the timeout is achieved.
767 * The maxrate parameter can be used to send a task with a limited
768 * bandwidth (smaller than the physical available value). Use
769 * MSG_task_send_with_timeout() if you don't limit the rate (or pass -1 as a rate
770 * value do disable this feature).
772 * @param task the task to be sent
773 * @param alias the mailbox name to where the task is sent
774 * @param timeout is the maximum wait time for completion (if -1, this call is the same as #MSG_task_send)
775 * @param maxrate the maximum communication rate for sending this task (byte/sec)
777 * @return Returns #MSG_OK if the task was successfully sent,
778 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE, or #MSG_TIMEOUT otherwise.
780 msg_error_t MSG_task_send_with_timeout_bounded(msg_task_t task, const char *alias, double timeout, double maxrate)
782 task->simdata->rate = maxrate;
783 return MSG_task_send_with_timeout(task, alias, timeout);
787 * @brief Look if there is a communication on a mailbox and return the PID of the sender process.
789 * @param alias the name of the mailbox to be considered
791 * @return Returns the PID of sender process,
792 * -1 if there is no communication in the mailbox.
794 int MSG_task_listen_from(const char *alias)
796 simgrid::kernel::activity::CommImplPtr comm = simgrid::s4u::Mailbox::by_name(alias)->front();
798 return comm ? MSG_process_get_PID(static_cast<msg_task_t>(comm->src_buff_)->simdata->sender) : -1;
802 * @brief Sets the tracing category of a task.
804 * This function should be called after the creation of a MSG task, to define the category of that task. The
805 * first parameter task must contain a task that was created with the function #MSG_task_create. The second
806 * parameter category must contain a category that was previously declared with the function #TRACE_category
807 * (or with #TRACE_category_with_color).
809 * See @ref outcomes_vizu for details on how to trace the (categorized) resource utilization.
811 * @param task the task that is going to be categorized
812 * @param category the name of the category to be associated to the task
814 * @see MSG_task_get_category, TRACE_category, TRACE_category_with_color
816 void MSG_task_set_category (msg_task_t task, const char *category)
818 xbt_assert(task->category == nullptr, "Task %p(%s) already has a category (%s).", task, task->name, task->category);
820 // if user provides a nullptr category, task is no longer traced
821 if (category == nullptr) {
822 xbt_free(task->category);
823 task->category = nullptr;
824 XBT_DEBUG("MSG task %p(%s), category removed", task, task->name);
827 task->category = xbt_strdup(category);
828 XBT_DEBUG("MSG task %p(%s), category %s", task, task->name, task->category);
833 * @brief Gets the current tracing category of a task.
835 * @param task the task to be considered
837 * @see MSG_task_set_category
839 * @return Returns the name of the tracing category of the given task, nullptr otherwise
841 const char *MSG_task_get_category (msg_task_t task)
843 return task->category;