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. */
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_req_remove_from_actions(smx_req_t req);
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 XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm);
23 static smx_action_t SIMIX_rdv_get_request(smx_rdv_t rdv, e_smx_comm_type_t type,
24 int (*match_fun)(void *, void *), void *);
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 request 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 smx_rdv_t SIMIX_rdv_get_by_name(const char *name)
73 return xbt_dict_get_or_null(rdv_points, name);
76 int SIMIX_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host)
78 smx_action_t comm = NULL;
79 xbt_fifo_item_t item = NULL;
82 xbt_fifo_foreach(rdv->comm_fifo, item, comm, smx_action_t) {
83 if (comm->comm.src_proc->smx_host == host)
90 smx_action_t SIMIX_rdv_get_head(smx_rdv_t rdv)
92 return xbt_fifo_get_item_content(xbt_fifo_get_first_item(rdv->comm_fifo));
96 * \brief Push a communication request into a rendez-vous point
97 * \param rdv The rendez-vous point
98 * \param comm The communication request
100 static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm)
102 xbt_fifo_push(rdv->comm_fifo, comm);
103 comm->comm.rdv = rdv;
107 * \brief Remove a communication request from a rendez-vous point
108 * \param rdv The rendez-vous point
109 * \param comm The communication request
111 static XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm)
113 xbt_fifo_remove(rdv->comm_fifo, comm);
114 comm->comm.rdv = NULL;
118 * \brief Wrapper to SIMIX_rdv_get_request
120 smx_action_t SIMIX_comm_get_send_match(smx_rdv_t rdv, int (*match_fun)(void*, void*), void* data) {
121 return SIMIX_rdv_get_request(rdv, SIMIX_COMM_SEND, match_fun, data);
125 * \brief Checks if there is a communication action queued in a rendez-vous matching our needs
126 * \param type The type of communication we are looking for (comm_send, comm_recv)
127 * \return The communication action if found, NULL otherwise
129 smx_action_t SIMIX_rdv_get_request(smx_rdv_t rdv, e_smx_comm_type_t type,
130 int (*match_fun)(void *, void *), void *data)
132 // FIXME rewrite this function by using SIMIX_rdv_has_send/recv_match
134 xbt_fifo_item_t item;
135 void* req_data = NULL;
137 xbt_fifo_foreach(rdv->comm_fifo, item, action, smx_action_t) {
138 if (action->comm.type == SIMIX_COMM_SEND) {
139 req_data = action->comm.src_data;
140 } else if (action->comm.type == SIMIX_COMM_RECEIVE) {
141 req_data = action->comm.dst_data;
143 if (action->comm.type == type && (!match_fun || match_fun(data, req_data))) {
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",
153 action, action->comm.type, type);
155 XBT_DEBUG("No matching communication action found");
160 * \brief Checks if there is a send communication action
161 * queued in a rendez-vous matching our needs.
162 * \return 1 if found, 0 otherwise
164 int SIMIX_comm_has_send_match(smx_rdv_t rdv, int (*match_fun)(void*, void*), void* data) {
167 xbt_fifo_item_t item;
169 xbt_fifo_foreach(rdv->comm_fifo, item, action, smx_action_t){
170 if (action->comm.type == SIMIX_COMM_SEND
171 && (!match_fun || match_fun(data, action->comm.src_data))) {
172 XBT_DEBUG("Found a matching communication action %p", action);
176 XBT_DEBUG("No matching communication action found");
181 * \brief Checks if there is a recv communication action
182 * queued in a rendez-vous matching our needs.
183 * \return 1 if found, 0 otherwise
185 int SIMIX_comm_has_recv_match(smx_rdv_t rdv, int (*match_fun)(void*, void*), void* data) {
188 xbt_fifo_item_t item;
190 xbt_fifo_foreach(rdv->comm_fifo, item, action, smx_action_t) {
191 if (action->comm.type == SIMIX_COMM_RECEIVE
192 && (!match_fun || match_fun(data, action->comm.dst_data))) {
193 XBT_DEBUG("Found a matching communication action %p", action);
197 XBT_DEBUG("No matching communication action found");
201 /******************************************************************************/
202 /* Comunication Actions */
203 /******************************************************************************/
206 * \brief Creates a new comunicate action
207 * \param type The type of request (comm_send, comm_recv)
208 * \return The new comunicate action
210 smx_action_t SIMIX_comm_new(e_smx_comm_type_t type)
214 /* alloc structures */
215 act = xbt_mallocator_get(simix_global->action_mallocator);
217 act->type = SIMIX_ACTION_COMMUNICATE;
218 act->state = SIMIX_WAITING;
220 /* set communication */
221 act->comm.type = type;
222 act->comm.refcount = 1;
224 #ifdef HAVE_LATENCY_BOUND_TRACKING
225 //initialize with unknown value
226 act->latency_limited = -1;
230 act->category = NULL;
233 XBT_DEBUG("Create communicate action %p", act);
240 * \brief Destroy a communicate action
241 * \param action The communicate action to be destroyed
243 void SIMIX_comm_destroy(smx_action_t action)
245 XBT_DEBUG("Destroy action %p (refcount: %d), state: %d",
246 action, action->comm.refcount, action->state);
248 if (action->comm.refcount <= 0) {
249 xbt_backtrace_display_current();
250 xbt_die("the refcount of comm %p is already 0 before decreasing it. "
251 "That's a bug!", action);
253 action->comm.refcount--;
254 if (action->comm.refcount > 0)
256 XBT_DEBUG("Really free communication %p; refcount is now %d", action,
257 action->comm.refcount);
259 #ifdef HAVE_LATENCY_BOUND_TRACKING
260 action->latency_limited = SIMIX_comm_is_latency_bounded( action ) ;
263 xbt_free(action->name);
264 SIMIX_comm_destroy_internal_actions(action);
266 if (action->comm.detached && action->state != SIMIX_DONE) {
267 /* the communication has failed and was detached:
268 * we have to free the buffer */
269 ((void_f_pvoid_t) action->comm.src_data)(action->comm.src_buff);
272 xbt_mallocator_release(simix_global->action_mallocator, action);
275 void SIMIX_comm_destroy_internal_actions(smx_action_t action)
277 if (action->comm.surf_comm){
278 #ifdef HAVE_LATENCY_BOUND_TRACKING
279 action->latency_limited = SIMIX_comm_is_latency_bounded(action);
281 action->comm.surf_comm->model_type->action_unref(action->comm.surf_comm);
282 action->comm.surf_comm = NULL;
285 if (action->comm.src_timeout){
286 action->comm.src_timeout->model_type->action_unref(action->comm.src_timeout);
287 action->comm.src_timeout = NULL;
290 if (action->comm.dst_timeout){
291 action->comm.dst_timeout->model_type->action_unref(action->comm.dst_timeout);
292 action->comm.dst_timeout = NULL;
296 smx_action_t SIMIX_comm_isend(smx_process_t src_proc, smx_rdv_t rdv,
297 double task_size, double rate,
298 void *src_buff, size_t src_buff_size,
299 int (*match_fun)(void *, void *), void *data,
304 /* Look for communication request matching our needs.
305 If it is not found then create it and push it into the rendez-vous point */
306 action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_RECEIVE, match_fun, data);
309 action = SIMIX_comm_new(SIMIX_COMM_SEND);
310 SIMIX_rdv_push(rdv, action);
312 action->state = SIMIX_READY;
313 action->comm.type = SIMIX_COMM_READY;
315 xbt_fifo_push(src_proc->comms, action);
317 /* if the communication action is detached then decrease the refcount
318 * by one, so it will be eliminated by the receiver's destroy call */
320 action->comm.detached = 1;
321 action->comm.refcount--;
324 /* Setup the communication request */
325 action->comm.src_proc = src_proc;
326 action->comm.task_size = task_size;
327 action->comm.rate = rate;
328 action->comm.src_buff = src_buff;
329 action->comm.src_buff_size = src_buff_size;
330 action->comm.src_data = data;
333 action->state = SIMIX_RUNNING;
337 SIMIX_comm_start(action);
338 return (detached ? NULL : action);
341 smx_action_t SIMIX_comm_irecv(smx_process_t dst_proc, smx_rdv_t rdv,
342 void *dst_buff, size_t *dst_buff_size,
343 int (*match_fun)(void *, void *), void *data)
347 /* Look for communication request matching our needs.
348 * If it is not found then create it and push it into the rendez-vous point
350 action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_SEND, match_fun, data);
353 action = SIMIX_comm_new(SIMIX_COMM_RECEIVE);
354 SIMIX_rdv_push(rdv, action);
356 action->state = SIMIX_READY;
357 action->comm.type = SIMIX_COMM_READY;
359 xbt_fifo_push(dst_proc->comms, action);
361 /* Setup communication request */
362 action->comm.dst_proc = dst_proc;
363 action->comm.dst_buff = dst_buff;
364 action->comm.dst_buff_size = dst_buff_size;
365 action->comm.dst_data = data;
368 action->state = SIMIX_RUNNING;
372 SIMIX_comm_start(action);
376 void SIMIX_pre_comm_wait(smx_req_t req, smx_action_t action, double timeout, int idx)
378 /* the request may be a wait, a send or a recv */
381 /* Associate this request to the action */
382 xbt_fifo_push(action->request_list, req);
383 req->issuer->waiting_action = action;
387 action->state = SIMIX_DONE;
389 /* If we reached this point, the wait request must have a timeout */
390 /* Otherwise it shouldn't be enabled and executed by the MC */
394 if (action->comm.src_proc == req->issuer)
395 action->state = SIMIX_SRC_TIMEOUT;
397 action->state = SIMIX_DST_TIMEOUT;
400 SIMIX_comm_finish(action);
404 /* If the action has already finish perform the error handling, */
405 /* otherwise set up a waiting timeout on the right side */
406 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
407 SIMIX_comm_finish(action);
408 } 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 */
409 sleep = surf_workstation_model->extension.workstation.sleep(req->issuer->smx_host->host, timeout);
410 surf_workstation_model->action_data_set(sleep, action);
412 if (req->issuer == action->comm.src_proc)
413 action->comm.src_timeout = sleep;
415 action->comm.dst_timeout = sleep;
419 void SIMIX_pre_comm_test(smx_req_t req)
421 smx_action_t action = req->comm_test.comm;
424 req->comm_test.result = action->comm.src_proc && action->comm.dst_proc;
425 if(req->comm_test.result){
426 action->state = SIMIX_DONE;
427 xbt_fifo_push(action->request_list, req);
428 SIMIX_comm_finish(action);
430 SIMIX_request_answer(req);
435 req->comm_test.result = (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING);
436 if (req->comm_test.result) {
437 xbt_fifo_push(action->request_list, req);
438 SIMIX_comm_finish(action);
440 SIMIX_request_answer(req);
444 void SIMIX_pre_comm_testany(smx_req_t req, int idx)
448 xbt_dynar_t actions = req->comm_testany.comms;
449 req->comm_testany.result = -1;
453 SIMIX_request_answer(req);
455 action = xbt_dynar_get_as(actions, idx, smx_action_t);
456 req->comm_testany.result = idx;
457 xbt_fifo_push(action->request_list, req);
458 action->state = SIMIX_DONE;
459 SIMIX_comm_finish(action);
464 xbt_dynar_foreach(req->comm_testany.comms,cursor,action) {
465 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
466 req->comm_testany.result = cursor;
467 xbt_fifo_push(action->request_list, req);
468 SIMIX_comm_finish(action);
472 SIMIX_request_answer(req);
475 void SIMIX_pre_comm_waitany(smx_req_t req, int idx)
478 unsigned int cursor = 0;
479 xbt_dynar_t actions = req->comm_waitany.comms;
482 action = xbt_dynar_get_as(actions, idx, smx_action_t);
483 xbt_fifo_push(action->request_list, req);
484 req->comm_waitany.result = idx;
485 action->state = SIMIX_DONE;
486 SIMIX_comm_finish(action);
490 xbt_dynar_foreach(actions, cursor, action){
491 /* Associate this request to the action */
492 xbt_fifo_push(action->request_list, req);
493 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING){
494 SIMIX_comm_finish(action);
500 void SIMIX_waitany_req_remove_from_actions(smx_req_t req)
503 unsigned int cursor = 0;
504 xbt_dynar_t actions = req->comm_waitany.comms;
506 xbt_dynar_foreach(actions, cursor, action){
507 xbt_fifo_remove(action->request_list, req);
512 * \brief Start the simulation of a communication request
513 * \param action The communication action
516 XBT_INLINE void SIMIX_comm_start(smx_action_t action)
518 /* If both the sender and the receiver are already there, start the communication */
519 if (action->state == SIMIX_READY) {
521 smx_host_t sender = action->comm.src_proc->smx_host;
522 smx_host_t receiver = action->comm.dst_proc->smx_host;
524 XBT_DEBUG("Starting communication %p from '%s' to '%s'", action,
525 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
527 action->comm.surf_comm = surf_workstation_model->extension.workstation.
528 communicate(sender->host, receiver->host, action->comm.task_size, action->comm.rate);
530 surf_workstation_model->action_data_set(action->comm.surf_comm, action);
532 action->state = SIMIX_RUNNING;
534 /* If a link is failed, detect it immediately */
535 if (surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) {
536 XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure",
537 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
538 action->state = SIMIX_LINK_FAILURE;
539 SIMIX_comm_destroy_internal_actions(action);
542 /* If any of the process is suspend, create the action but stop its execution,
543 it will be restarted when the sender process resume */
544 if (SIMIX_process_is_suspended(action->comm.src_proc) ||
545 SIMIX_process_is_suspended(action->comm.dst_proc)) {
546 /* FIXME: check what should happen with the action state */
547 surf_workstation_model->suspend(action->comm.surf_comm);
553 * \brief Answers the SIMIX requests associated to a communication action.
554 * \param action a finished communication action
556 void SIMIX_comm_finish(smx_action_t action)
558 volatile unsigned int destroy_count = 0;
561 while ((req = xbt_fifo_shift(action->request_list))) {
563 /* If a waitany request is waiting for this action to finish, then remove
564 it from the other actions in the waitany list. Afterwards, get the
565 position of the actual action in the waitany request's actions dynar and
566 return it as the result of the call */
567 if (req->call == REQ_COMM_WAITANY) {
568 SIMIX_waitany_req_remove_from_actions(req);
570 req->comm_waitany.result = xbt_dynar_search(req->comm_waitany.comms, &action);
573 /* If the action is still in a rendez-vous point then remove from it */
574 if (action->comm.rdv)
575 SIMIX_rdv_remove(action->comm.rdv, action);
577 XBT_DEBUG("SIMIX_comm_finish: action state = %d", action->state);
579 /* Check out for errors */
580 switch (action->state) {
583 XBT_DEBUG("Communication %p complete!", action);
584 SIMIX_comm_copy_data(action);
587 case SIMIX_SRC_TIMEOUT:
589 THROWF(timeout_error, 0, "Communication timeouted because of sender");
591 CATCH(req->issuer->running_ctx->exception) {
592 req->issuer->doexception = 1;
596 case SIMIX_DST_TIMEOUT:
598 THROWF(timeout_error, 0, "Communication timeouted because of receiver");
600 CATCH(req->issuer->running_ctx->exception) {
601 req->issuer->doexception = 1;
605 case SIMIX_SRC_HOST_FAILURE:
607 if (req->issuer == action->comm.src_proc)
608 THROWF(host_error, 0, "Host failed");
610 THROWF(network_error, 0, "Remote peer failed");
612 CATCH(req->issuer->running_ctx->exception) {
613 req->issuer->doexception = 1;
617 case SIMIX_DST_HOST_FAILURE:
619 if (req->issuer == action->comm.dst_proc)
620 THROWF(host_error, 0, "Host failed");
622 THROWF(network_error, 0, "Remote peer failed");
624 CATCH(req->issuer->running_ctx->exception) {
625 req->issuer->doexception = 1;
629 case SIMIX_LINK_FAILURE:
631 XBT_DEBUG("Link failure in action %p between '%s' and '%s': posting an exception to the issuer: %s (%p)",
633 action->comm.src_proc ? action->comm.src_proc->smx_host->name : NULL,
634 action->comm.dst_proc ? action->comm.dst_proc->smx_host->name : NULL,
635 req->issuer->name, req->issuer);
636 THROWF(network_error, 0, "Link failure");
638 CATCH(req->issuer->running_ctx->exception) {
639 req->issuer->doexception = 1;
645 if (req->issuer == action->comm.dst_proc) {
646 THROWF(cancel_error, 0, "Communication canceled by the sender");
649 THROWF(cancel_error, 0, "Communication canceled by the receiver");
652 CATCH(req->issuer->running_ctx->exception) {
653 req->issuer->doexception = 1;
658 xbt_die("Unexpected action state in SIMIX_comm_finish: %d", action->state);
661 /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */
662 if (req->issuer->doexception) {
663 if (req->call == REQ_COMM_WAITANY) {
664 req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_waitany.comms, &action);
666 else if (req->call == REQ_COMM_TESTANY) {
667 req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_testany.comms, &action);
671 req->issuer->waiting_action = NULL;
672 xbt_fifo_remove(req->issuer->comms, action);
673 SIMIX_request_answer(req);
677 while (destroy_count-- > 0)
678 SIMIX_comm_destroy(action);
682 * \brief This function is called when a Surf communication action is finished.
683 * \param action the corresponding Simix communication
685 void SIMIX_post_comm(smx_action_t action)
687 /* Update action state */
688 if (action->comm.src_timeout &&
689 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_DONE)
690 action->state = SIMIX_SRC_TIMEOUT;
691 else if (action->comm.dst_timeout &&
692 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_DONE)
693 action->state = SIMIX_DST_TIMEOUT;
694 else if (action->comm.src_timeout &&
695 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_FAILED)
696 action->state = SIMIX_SRC_HOST_FAILURE;
697 else if (action->comm.dst_timeout &&
698 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_FAILED)
699 action->state = SIMIX_DST_HOST_FAILURE;
700 else if (action->comm.surf_comm &&
701 surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED)
702 action->state = SIMIX_LINK_FAILURE;
704 action->state = SIMIX_DONE;
706 XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d",
707 action, action->state, action->comm.src_proc, action->comm.dst_proc, action->comm.detached);
709 /* destroy the surf actions associated with the Simix communication */
710 SIMIX_comm_destroy_internal_actions(action);
712 /* remove the communication action from the list of pending communications
713 * of both processes (if they still exist) */
714 if (action->comm.src_proc) {
715 xbt_fifo_remove(action->comm.src_proc->comms, action);
717 if (action->comm.dst_proc) {
718 xbt_fifo_remove(action->comm.dst_proc->comms, action);
721 /* if there are requests associated with the action, then answer them */
722 if (xbt_fifo_size(action->request_list)) {
723 SIMIX_comm_finish(action);
727 void SIMIX_comm_cancel(smx_action_t action)
729 /* if the action is a waiting state means that it is still in a rdv */
730 /* so remove from it and delete it */
731 if (action->state == SIMIX_WAITING) {
732 SIMIX_rdv_remove(action->comm.rdv, action);
733 action->state = SIMIX_CANCELED;
735 else if (!MC_IS_ENABLED /* when running the MC there are no surf actions */
736 && (action->state == SIMIX_READY || action->state == SIMIX_RUNNING)) {
738 surf_workstation_model->action_cancel(action->comm.surf_comm);
742 void SIMIX_comm_suspend(smx_action_t action)
744 /*FIXME: shall we suspend also the timeout actions? */
745 surf_workstation_model->suspend(action->comm.surf_comm);
748 void SIMIX_comm_resume(smx_action_t action)
750 /*FIXME: check what happen with the timeouts */
751 surf_workstation_model->resume(action->comm.surf_comm);
755 /************* Action Getters **************/
758 * \brief get the amount remaining from the communication
759 * \param action The communication
761 double SIMIX_comm_get_remains(smx_action_t action)
769 switch (action->state) {
772 remains = surf_workstation_model->get_remains(action->comm.surf_comm);
777 remains = 0; /*FIXME: check what should be returned */
781 remains = 0; /*FIXME: is this correct? */
787 e_smx_state_t SIMIX_comm_get_state(smx_action_t action)
789 return action->state;
793 * \brief Return the user data associated to the sender of the communication
794 * \param action The communication
795 * \return the user data
797 void* SIMIX_comm_get_src_data(smx_action_t action)
799 return action->comm.src_data;
803 * \brief Return the user data associated to the receiver of the communication
804 * \param action The communication
805 * \return the user data
807 void* SIMIX_comm_get_dst_data(smx_action_t action)
809 return action->comm.dst_data;
812 smx_process_t SIMIX_comm_get_src_proc(smx_action_t action)
814 return action->comm.src_proc;
817 smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action)
819 return action->comm.dst_proc;
822 #ifdef HAVE_LATENCY_BOUND_TRACKING
824 * \brief verify if communication is latency bounded
825 * \param comm The communication
827 XBT_INLINE int SIMIX_comm_is_latency_bounded(smx_action_t action)
832 if (action->comm.surf_comm){
833 XBT_DEBUG("Getting latency limited for surf_action (%p)", action->comm.surf_comm);
834 action->latency_limited = surf_workstation_model->get_latency_limited(action->comm.surf_comm);
835 XBT_DEBUG("Action limited is %d", action->latency_limited);
837 return action->latency_limited;
841 /******************************************************************************/
842 /* SIMIX_comm_copy_data callbacks */
843 /******************************************************************************/
844 static void (*SIMIX_comm_copy_data_callback) (smx_action_t, size_t) =
845 &SIMIX_comm_copy_pointer_callback;
848 SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t))
850 SIMIX_comm_copy_data_callback = callback;
853 void SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size)
855 xbt_assert((buff_size == sizeof(void *)),
856 "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
857 *(void **) (comm->comm.dst_buff) = comm->comm.src_buff;
860 void SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size)
862 memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size);
865 void smpi_comm_copy_data_callback(smx_action_t comm, size_t buff_size)
867 memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size);
868 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
869 free(comm->comm.src_buff);
873 * \brief Copy the communication data from the sender's buffer to the receiver's one
874 * \param comm The communication
876 void SIMIX_comm_copy_data(smx_action_t comm)
878 size_t buff_size = comm->comm.src_buff_size;
879 /* If there is no data to be copy then return */
880 if (!comm->comm.src_buff || !comm->comm.dst_buff || comm->comm.copied == 1)
883 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)",
885 comm->comm.src_proc->smx_host->name, comm->comm.src_buff,
886 comm->comm.dst_proc->smx_host->name, comm->comm.dst_buff, buff_size);
888 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
889 if (comm->comm.dst_buff_size)
890 buff_size = MIN(buff_size, *(comm->comm.dst_buff_size));
892 /* Update the receiver's buffer size to the copied amount */
893 if (comm->comm.dst_buff_size)
894 *comm->comm.dst_buff_size = buff_size;
898 (*SIMIX_comm_copy_data_callback) (comm, buff_size);
903 SIMIX_comm_copy_data_callback(comm, buff_size);
906 /* Set the copied flag so we copy data only once */
907 /* (this function might be called from both communication ends) */
908 comm->comm.copied = 1;