1 /* Copyright (c) 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "smx_private.h"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_network, simix,
13 "Logging specific to SIMIX (network)");
15 static xbt_dict_t rdv_points = NULL;
16 unsigned long int smx_total_comms = 0;
18 static void SIMIX_waitany_remove_simcall_from_actions(smx_simcall_t simcall);
19 static void SIMIX_comm_copy_data(smx_action_t comm);
20 static smx_action_t SIMIX_comm_new(e_smx_comm_type_t type);
21 static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm);
22 static smx_action_t SIMIX_rdv_get_comm(smx_rdv_t rdv, e_smx_comm_type_t type,
23 int (*match_fun)(void *, void *,smx_action_t),
24 void *user_data, smx_action_t my_action);
25 static void SIMIX_rdv_free(void *data);
27 void SIMIX_network_init(void)
29 rdv_points = xbt_dict_new_homogeneous(SIMIX_rdv_free);
32 void SIMIX_network_exit(void)
34 xbt_dict_free(&rdv_points);
37 /******************************************************************************/
38 /* Rendez-Vous Points */
39 /******************************************************************************/
41 smx_rdv_t SIMIX_rdv_create(const char *name)
43 /* two processes may have pushed the same rdv_create simcall at the same time */
44 smx_rdv_t rdv = name ? xbt_dict_get_or_null(rdv_points, name) : NULL;
47 rdv = xbt_new0(s_smx_rvpoint_t, 1);
48 rdv->name = name ? xbt_strdup(name) : NULL;
49 rdv->comm_fifo = xbt_fifo_new();
52 xbt_dict_set(rdv_points, rdv->name, rdv, NULL);
57 void SIMIX_rdv_destroy(smx_rdv_t rdv)
60 xbt_dict_remove(rdv_points, rdv->name);
63 void SIMIX_rdv_free(void *data)
65 smx_rdv_t rdv = (smx_rdv_t) data;
67 xbt_fifo_free(rdv->comm_fifo);
71 xbt_dict_t SIMIX_get_rdv_points()
76 smx_rdv_t SIMIX_rdv_get_by_name(const char *name)
78 return xbt_dict_get_or_null(rdv_points, name);
81 int SIMIX_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
83 smx_action_t comm = NULL;
84 xbt_fifo_item_t item = NULL;
87 xbt_fifo_foreach(rdv->comm_fifo, item, comm, smx_action_t) {
88 if (comm->comm.src_proc->smx_host == host)
95 smx_action_t SIMIX_rdv_get_head(smx_rdv_t rdv)
97 return xbt_fifo_get_item_content(xbt_fifo_get_first_item(rdv->comm_fifo));
101 * \brief Pushes a communication action into a rendez-vous point
102 * \param rdv The rendez-vous point
103 * \param comm The communication action
105 static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm)
107 xbt_fifo_push(rdv->comm_fifo, comm);
108 comm->comm.rdv = rdv;
112 * \brief Removes a communication action from a rendez-vous point
113 * \param rdv The rendez-vous point
114 * \param comm The communication action
116 XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm)
118 xbt_fifo_remove(rdv->comm_fifo, comm);
119 comm->comm.rdv = NULL;
123 * \brief Checks if there is a communication action queued in a rendez-vous matching our needs
124 * \param type The type of communication we are looking for (comm_send, comm_recv)
125 * \return The communication action if found, NULL otherwise
127 smx_action_t SIMIX_rdv_get_comm(smx_rdv_t rdv, e_smx_comm_type_t type,
128 int (*match_fun)(void *, void *,smx_action_t),
129 void *this_user_data, smx_action_t my_action)
132 xbt_fifo_item_t item;
133 void* other_user_data = NULL;
135 xbt_fifo_foreach(rdv->comm_fifo, item, action, smx_action_t) {
136 if (action->comm.type == SIMIX_COMM_SEND) {
137 other_user_data = action->comm.src_data;
138 } else if (action->comm.type == SIMIX_COMM_RECEIVE) {
139 other_user_data = action->comm.dst_data;
141 if (action->comm.type == type &&
142 (!match_fun || match_fun(this_user_data, other_user_data, action)) &&
143 (!action->comm.match_fun || action->comm.match_fun(other_user_data, this_user_data, my_action))) {
144 XBT_DEBUG("Found a matching communication action %p", action);
145 xbt_fifo_remove_item(rdv->comm_fifo, item);
146 xbt_fifo_free_item(item);
147 action->comm.refcount++;
148 action->comm.rdv = NULL;
151 XBT_DEBUG("Sorry, communication action %p does not match our needs:"
152 " its type is %d but we are looking for a comm of type %d (or maybe the filtering didn't match)",
153 action, (int)action->comm.type, (int)type);
155 XBT_DEBUG("No matching communication action found");
160 /******************************************************************************/
161 /* Communication Actions */
162 /******************************************************************************/
165 * \brief Creates a new communicate action
166 * \param type The direction of communication (comm_send, comm_recv)
167 * \return The new communicate action
169 smx_action_t SIMIX_comm_new(e_smx_comm_type_t type)
173 /* alloc structures */
174 act = xbt_mallocator_get(simix_global->action_mallocator);
176 act->type = SIMIX_ACTION_COMMUNICATE;
177 act->state = SIMIX_WAITING;
179 /* set communication */
180 act->comm.type = type;
181 act->comm.refcount = 1;
183 #ifdef HAVE_LATENCY_BOUND_TRACKING
184 //initialize with unknown value
185 act->latency_limited = -1;
189 act->category = NULL;
192 XBT_DEBUG("Create communicate action %p", act);
199 * \brief Destroy a communicate action
200 * \param action The communicate action to be destroyed
202 void SIMIX_comm_destroy(smx_action_t action)
204 XBT_DEBUG("Destroy action %p (refcount: %d), state: %d",
205 action, action->comm.refcount, (int)action->state);
207 if (action->comm.refcount <= 0) {
208 xbt_backtrace_display_current();
209 xbt_die("the refcount of comm %p is already 0 before decreasing it. "
210 "That's a bug!", action);
212 action->comm.refcount--;
213 if (action->comm.refcount > 0)
215 XBT_DEBUG("Really free communication %p; refcount is now %d", action,
216 action->comm.refcount);
218 #ifdef HAVE_LATENCY_BOUND_TRACKING
219 action->latency_limited = SIMIX_comm_is_latency_bounded( action ) ;
222 xbt_free(action->name);
223 SIMIX_comm_destroy_internal_actions(action);
225 if (action->comm.detached && action->state != SIMIX_DONE) {
226 /* the communication has failed and was detached:
227 * we have to free the buffer */
228 if (action->comm.clean_fun) {
229 action->comm.clean_fun(action->comm.src_buff);
231 action->comm.src_buff = NULL;
234 xbt_mallocator_release(simix_global->action_mallocator, action);
237 void SIMIX_comm_destroy_internal_actions(smx_action_t action)
239 if (action->comm.surf_comm){
240 #ifdef HAVE_LATENCY_BOUND_TRACKING
241 action->latency_limited = SIMIX_comm_is_latency_bounded(action);
243 action->comm.surf_comm->model_type->action_unref(action->comm.surf_comm);
244 action->comm.surf_comm = NULL;
247 if (action->comm.src_timeout){
248 action->comm.src_timeout->model_type->action_unref(action->comm.src_timeout);
249 action->comm.src_timeout = NULL;
252 if (action->comm.dst_timeout){
253 action->comm.dst_timeout->model_type->action_unref(action->comm.dst_timeout);
254 action->comm.dst_timeout = NULL;
258 smx_action_t SIMIX_comm_isend(smx_process_t src_proc, smx_rdv_t rdv,
259 double task_size, double rate,
260 void *src_buff, size_t src_buff_size,
261 int (*match_fun)(void *, void *,smx_action_t),
262 void (*clean_fun)(void *), // used to free the action in case of problem after a detached send
266 /* Prepare an action describing us, so that it gets passed to the user-provided filter of other side */
267 smx_action_t this_action = SIMIX_comm_new(SIMIX_COMM_SEND);
269 /* Look for communication action matching our needs. We also provide a description of
270 * ourself so that the other side also gets a chance of choosing if it wants to match with us.
272 * If it is not found then push our communication into the rendez-vous point */
273 smx_action_t other_action = SIMIX_rdv_get_comm(rdv, SIMIX_COMM_RECEIVE, match_fun, data, this_action);
276 other_action = this_action;
277 SIMIX_rdv_push(rdv, this_action);
279 SIMIX_comm_destroy(this_action);
280 --smx_total_comms; // this creation was a pure waste
282 other_action->state = SIMIX_READY;
283 other_action->comm.type = SIMIX_COMM_READY;
285 xbt_fifo_push(src_proc->comms, other_action);
287 /* if the communication action is detached then decrease the refcount
288 * by one, so it will be eliminated by the receiver's destroy call */
290 other_action->comm.detached = 1;
291 other_action->comm.refcount--;
292 other_action->comm.clean_fun = clean_fun;
294 other_action->comm.clean_fun = NULL;
297 /* Setup the communication action */
298 other_action->comm.src_proc = src_proc;
299 other_action->comm.task_size = task_size;
300 other_action->comm.rate = rate;
301 other_action->comm.src_buff = src_buff;
302 other_action->comm.src_buff_size = src_buff_size;
303 other_action->comm.src_data = data;
305 other_action->comm.match_fun = match_fun;
308 other_action->state = SIMIX_RUNNING;
312 SIMIX_comm_start(other_action);
313 return (detached ? NULL : other_action);
316 smx_action_t SIMIX_comm_irecv(smx_process_t dst_proc, smx_rdv_t rdv,
317 void *dst_buff, size_t *dst_buff_size,
318 int (*match_fun)(void *, void *, smx_action_t), void *data)
320 /* Prepare an action describing us, so that it gets passed to the user-provided filter of other side */
321 smx_action_t this_action = SIMIX_comm_new(SIMIX_COMM_RECEIVE);
323 /* Look for communication action matching our needs. We also provide a description of
324 * ourself so that the other side also gets a chance of choosing if it wants to match with us.
326 * If it is not found then push our communication into the rendez-vous point */
327 smx_action_t other_action = SIMIX_rdv_get_comm(rdv, SIMIX_COMM_SEND, match_fun, data, this_action);
330 other_action = this_action;
331 SIMIX_rdv_push(rdv, this_action);
333 SIMIX_comm_destroy(this_action);
334 --smx_total_comms; // this creation was a pure waste
336 other_action->state = SIMIX_READY;
337 other_action->comm.type = SIMIX_COMM_READY;
339 xbt_fifo_push(dst_proc->comms, other_action);
341 /* Setup communication action */
342 other_action->comm.dst_proc = dst_proc;
343 other_action->comm.dst_buff = dst_buff;
344 other_action->comm.dst_buff_size = dst_buff_size;
345 other_action->comm.dst_data = data;
347 other_action->comm.match_fun = match_fun;
350 other_action->state = SIMIX_RUNNING;
354 SIMIX_comm_start(other_action);
358 void SIMIX_pre_comm_wait(smx_simcall_t simcall, smx_action_t action, double timeout, int idx)
361 /* the simcall may be a wait, a send or a recv */
364 /* Associate this simcall to the wait action */
365 xbt_fifo_push(action->simcalls, simcall);
366 simcall->issuer->waiting_action = action;
370 action->state = SIMIX_DONE;
372 /* If we reached this point, the wait simcall must have a timeout */
373 /* Otherwise it shouldn't be enabled and executed by the MC */
377 if (action->comm.src_proc == simcall->issuer)
378 action->state = SIMIX_SRC_TIMEOUT;
380 action->state = SIMIX_DST_TIMEOUT;
383 SIMIX_comm_finish(action);
387 /* If the action has already finish perform the error handling, */
388 /* otherwise set up a waiting timeout on the right side */
389 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
390 SIMIX_comm_finish(action);
391 } else { /* if (timeout >= 0) { we need a surf sleep action even when there is no timeout, otherwise surf won't tell us when the host fails */
392 sleep = surf_workstation_model->extension.workstation.sleep(simcall->issuer->smx_host->host, timeout);
393 surf_workstation_model->action_data_set(sleep, action);
395 if (simcall->issuer == action->comm.src_proc)
396 action->comm.src_timeout = sleep;
398 action->comm.dst_timeout = sleep;
402 void SIMIX_pre_comm_test(smx_simcall_t simcall)
404 smx_action_t action = simcall->comm_test.comm;
407 simcall->comm_test.result = action->comm.src_proc && action->comm.dst_proc;
408 if(simcall->comm_test.result){
409 action->state = SIMIX_DONE;
410 xbt_fifo_push(action->simcalls, simcall);
411 SIMIX_comm_finish(action);
413 SIMIX_simcall_answer(simcall);
418 simcall->comm_test.result = (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING);
419 if (simcall->comm_test.result) {
420 xbt_fifo_push(action->simcalls, simcall);
421 SIMIX_comm_finish(action);
423 SIMIX_simcall_answer(simcall);
427 void SIMIX_pre_comm_testany(smx_simcall_t simcall, int idx)
431 xbt_dynar_t actions = simcall->comm_testany.comms;
432 simcall->comm_testany.result = -1;
436 SIMIX_simcall_answer(simcall);
438 action = xbt_dynar_get_as(actions, idx, smx_action_t);
439 simcall->comm_testany.result = idx;
440 xbt_fifo_push(action->simcalls, simcall);
441 action->state = SIMIX_DONE;
442 SIMIX_comm_finish(action);
447 xbt_dynar_foreach(simcall->comm_testany.comms,cursor,action) {
448 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
449 simcall->comm_testany.result = cursor;
450 xbt_fifo_push(action->simcalls, simcall);
451 SIMIX_comm_finish(action);
455 SIMIX_simcall_answer(simcall);
458 void SIMIX_pre_comm_waitany(smx_simcall_t simcall, int idx)
461 unsigned int cursor = 0;
462 xbt_dynar_t actions = simcall->comm_waitany.comms;
465 action = xbt_dynar_get_as(actions, idx, smx_action_t);
466 xbt_fifo_push(action->simcalls, simcall);
467 simcall->comm_waitany.result = idx;
468 action->state = SIMIX_DONE;
469 SIMIX_comm_finish(action);
473 xbt_dynar_foreach(actions, cursor, action){
474 /* associate this simcall to the the action */
475 xbt_fifo_push(action->simcalls, simcall);
477 /* see if the action is already finished */
478 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING){
479 SIMIX_comm_finish(action);
485 void SIMIX_waitany_remove_simcall_from_actions(smx_simcall_t simcall)
488 unsigned int cursor = 0;
489 xbt_dynar_t actions = simcall->comm_waitany.comms;
491 xbt_dynar_foreach(actions, cursor, action) {
492 xbt_fifo_remove(action->simcalls, simcall);
497 * \brief Starts the simulation of a communication action.
498 * \param action the communication action
500 XBT_INLINE void SIMIX_comm_start(smx_action_t action)
502 /* If both the sender and the receiver are already there, start the communication */
503 if (action->state == SIMIX_READY) {
505 smx_host_t sender = action->comm.src_proc->smx_host;
506 smx_host_t receiver = action->comm.dst_proc->smx_host;
508 XBT_DEBUG("Starting communication %p from '%s' to '%s'", action,
509 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
511 action->comm.surf_comm = surf_workstation_model->extension.workstation.
512 communicate(sender->host, receiver->host, action->comm.task_size, action->comm.rate);
514 surf_workstation_model->action_data_set(action->comm.surf_comm, action);
516 action->state = SIMIX_RUNNING;
518 /* If a link is failed, detect it immediately */
519 if (surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) {
520 XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure",
521 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
522 action->state = SIMIX_LINK_FAILURE;
523 SIMIX_comm_destroy_internal_actions(action);
526 /* If any of the process is suspend, create the action but stop its execution,
527 it will be restarted when the sender process resume */
528 if (SIMIX_process_is_suspended(action->comm.src_proc) ||
529 SIMIX_process_is_suspended(action->comm.dst_proc)) {
530 /* FIXME: check what should happen with the action state */
531 surf_workstation_model->suspend(action->comm.surf_comm);
537 * \brief Answers the SIMIX simcalls associated to a communication action.
538 * \param action a finished communication action
540 void SIMIX_comm_finish(smx_action_t action)
542 unsigned int destroy_count = 0;
543 smx_simcall_t simcall;
545 while ((simcall = xbt_fifo_shift(action->simcalls))) {
547 /* If a waitany simcall is waiting for this action to finish, then remove
548 it from the other actions in the waitany list. Afterwards, get the
549 position of the actual action in the waitany dynar and
550 return it as the result of the simcall */
551 if (simcall->call == SIMCALL_COMM_WAITANY) {
552 SIMIX_waitany_remove_simcall_from_actions(simcall);
554 simcall->comm_waitany.result = xbt_dynar_search(simcall->comm_waitany.comms, &action);
557 /* If the action is still in a rendez-vous point then remove from it */
558 if (action->comm.rdv)
559 SIMIX_rdv_remove(action->comm.rdv, action);
561 XBT_DEBUG("SIMIX_comm_finish: action state = %d", (int)action->state);
563 /* Check out for errors */
564 switch (action->state) {
567 XBT_DEBUG("Communication %p complete!", action);
568 SIMIX_comm_copy_data(action);
571 case SIMIX_SRC_TIMEOUT:
572 SMX_EXCEPTION(simcall->issuer, timeout_error, 0,
573 "Communication timeouted because of sender");
576 case SIMIX_DST_TIMEOUT:
577 SMX_EXCEPTION(simcall->issuer, timeout_error, 0,
578 "Communication timeouted because of receiver");
581 case SIMIX_SRC_HOST_FAILURE:
582 if (simcall->issuer == action->comm.src_proc)
583 SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
585 SMX_EXCEPTION(simcall->issuer, network_error, 0, "Remote peer failed");
588 case SIMIX_DST_HOST_FAILURE:
589 if (simcall->issuer == action->comm.dst_proc)
590 SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
592 SMX_EXCEPTION(simcall->issuer, network_error, 0, "Remote peer failed");
595 case SIMIX_LINK_FAILURE:
596 XBT_DEBUG("Link failure in action %p between '%s' and '%s': posting an exception to the issuer: %s (%p) detached:%d",
598 action->comm.src_proc ? action->comm.src_proc->smx_host->name : NULL,
599 action->comm.dst_proc ? action->comm.dst_proc->smx_host->name : NULL,
600 simcall->issuer->name, simcall->issuer, action->comm.detached);
601 if (action->comm.src_proc == simcall->issuer) {
602 XBT_DEBUG("I'm source");
603 } else if (action->comm.dst_proc == simcall->issuer) {
604 XBT_DEBUG("I'm dest");
606 XBT_DEBUG("I'm neither source nor dest");
608 SMX_EXCEPTION(simcall->issuer, network_error, 0, "Link failure");
612 if (simcall->issuer == action->comm.dst_proc)
613 SMX_EXCEPTION(simcall->issuer, cancel_error, 0,
614 "Communication canceled by the sender");
616 SMX_EXCEPTION(simcall->issuer, cancel_error, 0,
617 "Communication canceled by the receiver");
621 xbt_die("Unexpected action state in SIMIX_comm_finish: %d", (int)action->state);
624 /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */
625 if (simcall->issuer->doexception) {
626 if (simcall->call == SIMCALL_COMM_WAITANY) {
627 simcall->issuer->running_ctx->exception.value = xbt_dynar_search(simcall->comm_waitany.comms, &action);
629 else if (simcall->call == SIMCALL_COMM_TESTANY) {
630 simcall->issuer->running_ctx->exception.value = xbt_dynar_search(simcall->comm_testany.comms, &action);
634 simcall->issuer->waiting_action = NULL;
635 xbt_fifo_remove(simcall->issuer->comms, action);
636 SIMIX_simcall_answer(simcall);
640 while (destroy_count-- > 0)
641 SIMIX_comm_destroy(action);
645 * \brief This function is called when a Surf communication action is finished.
646 * \param action the corresponding Simix communication
648 void SIMIX_post_comm(smx_action_t action)
650 /* Update action state */
651 if (action->comm.src_timeout &&
652 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_DONE)
653 action->state = SIMIX_SRC_TIMEOUT;
654 else if (action->comm.dst_timeout &&
655 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_DONE)
656 action->state = SIMIX_DST_TIMEOUT;
657 else if (action->comm.src_timeout &&
658 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_FAILED)
659 action->state = SIMIX_SRC_HOST_FAILURE;
660 else if (action->comm.dst_timeout &&
661 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_FAILED)
662 action->state = SIMIX_DST_HOST_FAILURE;
663 else if (action->comm.surf_comm &&
664 surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) {
665 XBT_DEBUG("Puta madre. Surf says that the link broke");
666 action->state = SIMIX_LINK_FAILURE;
668 action->state = SIMIX_DONE;
670 XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d",
671 action, (int)action->state, action->comm.src_proc, action->comm.dst_proc, action->comm.detached);
673 /* destroy the surf actions associated with the Simix communication */
674 SIMIX_comm_destroy_internal_actions(action);
676 /* remove the communication action from the list of pending communications
677 * of both processes (if they still exist) */
678 if (action->comm.src_proc) {
679 xbt_fifo_remove(action->comm.src_proc->comms, action);
681 if (action->comm.dst_proc) {
682 xbt_fifo_remove(action->comm.dst_proc->comms, action);
685 /* if there are simcalls associated with the action, then answer them */
686 if (xbt_fifo_size(action->simcalls)) {
687 SIMIX_comm_finish(action);
691 void SIMIX_comm_cancel(smx_action_t action)
693 /* if the action is a waiting state means that it is still in a rdv */
694 /* so remove from it and delete it */
695 if (action->state == SIMIX_WAITING) {
696 SIMIX_rdv_remove(action->comm.rdv, action);
697 action->state = SIMIX_CANCELED;
699 else if (!MC_IS_ENABLED /* when running the MC there are no surf actions */
700 && (action->state == SIMIX_READY || action->state == SIMIX_RUNNING)) {
702 surf_workstation_model->action_cancel(action->comm.surf_comm);
706 void SIMIX_comm_suspend(smx_action_t action)
708 /*FIXME: shall we suspend also the timeout actions? */
709 surf_workstation_model->suspend(action->comm.surf_comm);
712 void SIMIX_comm_resume(smx_action_t action)
714 /*FIXME: check what happen with the timeouts */
715 surf_workstation_model->resume(action->comm.surf_comm);
719 /************* Action Getters **************/
722 * \brief get the amount remaining from the communication
723 * \param action The communication
725 double SIMIX_comm_get_remains(smx_action_t action)
733 switch (action->state) {
736 remains = surf_workstation_model->get_remains(action->comm.surf_comm);
741 remains = 0; /*FIXME: check what should be returned */
745 remains = 0; /*FIXME: is this correct? */
751 e_smx_state_t SIMIX_comm_get_state(smx_action_t action)
753 return action->state;
757 * \brief Return the user data associated to the sender of the communication
758 * \param action The communication
759 * \return the user data
761 void* SIMIX_comm_get_src_data(smx_action_t action)
763 return action->comm.src_data;
767 * \brief Return the user data associated to the receiver of the communication
768 * \param action The communication
769 * \return the user data
771 void* SIMIX_comm_get_dst_data(smx_action_t action)
773 return action->comm.dst_data;
776 smx_process_t SIMIX_comm_get_src_proc(smx_action_t action)
778 return action->comm.src_proc;
781 smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action)
783 return action->comm.dst_proc;
786 #ifdef HAVE_LATENCY_BOUND_TRACKING
788 * \brief verify if communication is latency bounded
789 * \param comm The communication
791 XBT_INLINE int SIMIX_comm_is_latency_bounded(smx_action_t action)
796 if (action->comm.surf_comm){
797 XBT_DEBUG("Getting latency limited for surf_action (%p)", action->comm.surf_comm);
798 action->latency_limited = surf_workstation_model->get_latency_limited(action->comm.surf_comm);
799 XBT_DEBUG("Action limited is %d", action->latency_limited);
801 return action->latency_limited;
805 /******************************************************************************/
806 /* SIMIX_comm_copy_data callbacks */
807 /******************************************************************************/
808 static void (*SIMIX_comm_copy_data_callback) (smx_action_t, void*, size_t) =
809 &SIMIX_comm_copy_pointer_callback;
812 SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, void*, size_t))
814 SIMIX_comm_copy_data_callback = callback;
817 void SIMIX_comm_copy_pointer_callback(smx_action_t comm, void* buff, size_t buff_size)
819 xbt_assert((buff_size == sizeof(void *)),
820 "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
821 *(void **) (comm->comm.dst_buff) = buff;
824 void SIMIX_comm_copy_buffer_callback(smx_action_t comm, void* buff, size_t buff_size)
826 XBT_DEBUG("Copy the data over");
827 memcpy(comm->comm.dst_buff, buff, buff_size);
830 void smpi_comm_copy_data_callback(smx_action_t comm, void* buff, size_t buff_size)
832 XBT_DEBUG("Copy the data over");
833 memcpy(comm->comm.dst_buff, buff, buff_size);
834 if (comm->comm.detached) { // if this is a detached send, the source buffer was duplicated by SMPI sender to make the original buffer available to the application ASAP
836 comm->comm.src_buff = NULL;
841 * \brief Copy the communication data from the sender's buffer to the receiver's one
842 * \param comm The communication
844 void SIMIX_comm_copy_data(smx_action_t comm)
846 size_t buff_size = comm->comm.src_buff_size;
847 /* If there is no data to be copy then return */
848 if (!comm->comm.src_buff || !comm->comm.dst_buff || comm->comm.copied == 1)
851 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)",
853 comm->comm.src_proc ? comm->comm.src_proc->smx_host->name : "a finished process",
855 comm->comm.dst_proc ? comm->comm.dst_proc->smx_host->name : "a finished process",
856 comm->comm.dst_buff, buff_size);
858 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
859 if (comm->comm.dst_buff_size)
860 buff_size = MIN(buff_size, *(comm->comm.dst_buff_size));
862 /* Update the receiver's buffer size to the copied amount */
863 if (comm->comm.dst_buff_size)
864 *comm->comm.dst_buff_size = buff_size;
867 SIMIX_comm_copy_data_callback (comm, comm->comm.src_buff, buff_size);
869 /* Set the copied flag so we copy data only once */
870 /* (this function might be called from both communication ends) */
871 comm->comm.copied = 1;