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();
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, SIMIX_rdv_free);
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 xbt_assert(action->comm.refcount > 0,
249 "The refcount of comm %p is already 0 before decreasing it. "
250 "That's a bug!", action);
252 action->comm.refcount--;
253 if (action->comm.refcount > 0)
255 XBT_DEBUG("Really free communication %p; refcount is now %d", action,
256 action->comm.refcount);
258 #ifdef HAVE_LATENCY_BOUND_TRACKING
259 action->latency_limited = SIMIX_comm_is_latency_bounded( action ) ;
262 xbt_free(action->name);
263 SIMIX_comm_destroy_internal_actions(action);
265 if (action->comm.detached && action->state != SIMIX_DONE) {
266 /* the communication has failed and was detached:
267 * we have to free the buffer */
268 ((void_f_pvoid_t) action->comm.src_data)(action->comm.src_buff);
271 xbt_mallocator_release(simix_global->action_mallocator, action);
274 void SIMIX_comm_destroy_internal_actions(smx_action_t action)
276 if (action->comm.surf_comm){
277 #ifdef HAVE_LATENCY_BOUND_TRACKING
278 action->latency_limited = SIMIX_comm_is_latency_bounded(action);
280 action->comm.surf_comm->model_type->action_unref(action->comm.surf_comm);
281 action->comm.surf_comm = NULL;
284 if (action->comm.src_timeout){
285 action->comm.src_timeout->model_type->action_unref(action->comm.src_timeout);
286 action->comm.src_timeout = NULL;
289 if (action->comm.dst_timeout){
290 action->comm.dst_timeout->model_type->action_unref(action->comm.dst_timeout);
291 action->comm.dst_timeout = NULL;
295 smx_action_t SIMIX_comm_isend(smx_process_t src_proc, smx_rdv_t rdv,
296 double task_size, double rate,
297 void *src_buff, size_t src_buff_size,
298 int (*match_fun)(void *, void *), void *data,
303 /* Look for communication request matching our needs.
304 If it is not found then create it and push it into the rendez-vous point */
305 action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_RECEIVE, match_fun, data);
308 action = SIMIX_comm_new(SIMIX_COMM_SEND);
309 SIMIX_rdv_push(rdv, action);
311 action->state = SIMIX_READY;
312 action->comm.type = SIMIX_COMM_READY;
314 xbt_fifo_push(src_proc->comms, action);
316 /* if the communication action is detached then decrease the refcount
317 * by one, so it will be eliminated by the receiver's destroy call */
319 action->comm.detached = 1;
320 action->comm.refcount--;
323 /* Setup the communication request */
324 action->comm.src_proc = src_proc;
325 action->comm.task_size = task_size;
326 action->comm.rate = rate;
327 action->comm.src_buff = src_buff;
328 action->comm.src_buff_size = src_buff_size;
329 action->comm.src_data = data;
332 action->state = SIMIX_RUNNING;
336 SIMIX_comm_start(action);
340 smx_action_t SIMIX_comm_irecv(smx_process_t dst_proc, smx_rdv_t rdv,
341 void *dst_buff, size_t *dst_buff_size,
342 int (*match_fun)(void *, void *), void *data)
346 /* Look for communication request matching our needs.
347 * If it is not found then create it and push it into the rendez-vous point
349 action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_SEND, match_fun, data);
352 action = SIMIX_comm_new(SIMIX_COMM_RECEIVE);
353 SIMIX_rdv_push(rdv, action);
355 action->state = SIMIX_READY;
356 action->comm.type = SIMIX_COMM_READY;
358 xbt_fifo_push(dst_proc->comms, action);
360 /* Setup communication request */
361 action->comm.dst_proc = dst_proc;
362 action->comm.dst_buff = dst_buff;
363 action->comm.dst_buff_size = dst_buff_size;
364 action->comm.dst_data = data;
367 action->state = SIMIX_RUNNING;
371 SIMIX_comm_start(action);
375 void SIMIX_pre_comm_wait(smx_req_t req, smx_action_t action, double timeout, int idx)
377 /* the request may be a wait, a send or a recv */
380 /* Associate this request to the action */
381 xbt_fifo_push(action->request_list, req);
382 req->issuer->waiting_action = action;
386 action->state = SIMIX_DONE;
388 /* If we reached this point, the wait request must have a timeout */
389 /* Otherwise it shouldn't be enabled and executed by the MC */
393 if (action->comm.src_proc == req->issuer)
394 action->state = SIMIX_SRC_TIMEOUT;
396 action->state = SIMIX_DST_TIMEOUT;
399 SIMIX_comm_finish(action);
403 /* If the action has already finish perform the error handling, */
404 /* otherwise set up a waiting timeout on the right side */
405 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
406 SIMIX_comm_finish(action);
407 } 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 */
408 sleep = surf_workstation_model->extension.workstation.sleep(req->issuer->smx_host->host, timeout);
409 surf_workstation_model->action_data_set(sleep, action);
411 if (req->issuer == action->comm.src_proc)
412 action->comm.src_timeout = sleep;
414 action->comm.dst_timeout = sleep;
418 void SIMIX_pre_comm_test(smx_req_t req)
420 smx_action_t action = req->comm_test.comm;
423 req->comm_test.result = action->comm.src_proc && action->comm.dst_proc;
424 if(req->comm_test.result){
425 action->state = SIMIX_DONE;
426 xbt_fifo_push(action->request_list, req);
427 SIMIX_comm_finish(action);
429 SIMIX_request_answer(req);
434 req->comm_test.result = (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING);
435 if (req->comm_test.result) {
436 xbt_fifo_push(action->request_list, req);
437 SIMIX_comm_finish(action);
439 SIMIX_request_answer(req);
443 void SIMIX_pre_comm_testany(smx_req_t req, int idx)
447 xbt_dynar_t actions = req->comm_testany.comms;
448 req->comm_testany.result = -1;
452 SIMIX_request_answer(req);
454 action = xbt_dynar_get_as(actions, idx, smx_action_t);
455 req->comm_testany.result = idx;
456 xbt_fifo_push(action->request_list, req);
457 action->state = SIMIX_DONE;
458 SIMIX_comm_finish(action);
463 xbt_dynar_foreach(req->comm_testany.comms,cursor,action) {
464 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) {
465 req->comm_testany.result = cursor;
466 xbt_fifo_push(action->request_list, req);
467 SIMIX_comm_finish(action);
471 SIMIX_request_answer(req);
474 void SIMIX_pre_comm_waitany(smx_req_t req, int idx)
477 unsigned int cursor = 0;
478 xbt_dynar_t actions = req->comm_waitany.comms;
481 action = xbt_dynar_get_as(actions, idx, smx_action_t);
482 xbt_fifo_push(action->request_list, req);
483 req->comm_waitany.result = idx;
484 action->state = SIMIX_DONE;
485 SIMIX_comm_finish(action);
489 xbt_dynar_foreach(actions, cursor, action){
490 /* Associate this request to the action */
491 xbt_fifo_push(action->request_list, req);
492 if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING){
493 SIMIX_comm_finish(action);
499 void SIMIX_waitany_req_remove_from_actions(smx_req_t req)
502 unsigned int cursor = 0;
503 xbt_dynar_t actions = req->comm_waitany.comms;
505 xbt_dynar_foreach(actions, cursor, action){
506 xbt_fifo_remove(action->request_list, req);
511 * \brief Start the simulation of a communication request
512 * \param action The communication action
515 XBT_INLINE void SIMIX_comm_start(smx_action_t action)
517 /* If both the sender and the receiver are already there, start the communication */
518 if (action->state == SIMIX_READY) {
520 smx_host_t sender = action->comm.src_proc->smx_host;
521 smx_host_t receiver = action->comm.dst_proc->smx_host;
523 XBT_DEBUG("Starting communication %p from '%s' to '%s'", action,
524 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
526 action->comm.surf_comm = surf_workstation_model->extension.workstation.
527 communicate(sender->host, receiver->host, action->comm.task_size, action->comm.rate);
529 surf_workstation_model->action_data_set(action->comm.surf_comm, action);
531 action->state = SIMIX_RUNNING;
533 /* If a link is failed, detect it immediately */
534 if (surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) {
535 XBT_DEBUG("Communication from '%s' to '%s' failed to start because of a link failure",
536 SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver));
537 action->state = SIMIX_LINK_FAILURE;
538 SIMIX_comm_destroy_internal_actions(action);
541 /* If any of the process is suspend, create the action but stop its execution,
542 it will be restarted when the sender process resume */
543 if (SIMIX_process_is_suspended(action->comm.src_proc) ||
544 SIMIX_process_is_suspended(action->comm.dst_proc)) {
545 /* FIXME: check what should happen with the action state */
546 surf_workstation_model->suspend(action->comm.surf_comm);
552 * \brief Answers the SIMIX requests associated to a communication action.
553 * \param action a finished communication action
555 void SIMIX_comm_finish(smx_action_t action)
557 unsigned int destroy_count = 0;
560 while ((req = xbt_fifo_shift(action->request_list))) {
562 /* If a waitany request is waiting for this action to finish, then remove
563 it from the other actions in the waitany list. Afterwards, get the
564 position of the actual action in the waitany request's actions dynar and
565 return it as the result of the call */
566 if (req->call == REQ_COMM_WAITANY) {
567 SIMIX_waitany_req_remove_from_actions(req);
569 req->comm_waitany.result = xbt_dynar_search(req->comm_waitany.comms, &action);
572 /* If the action is still in a rendez-vous point then remove from it */
573 if (action->comm.rdv)
574 SIMIX_rdv_remove(action->comm.rdv, action);
576 XBT_DEBUG("SIMIX_comm_finish: action state = %d", action->state);
578 /* Check out for errors */
579 switch (action->state) {
582 XBT_DEBUG("Communication %p complete!", action);
583 SIMIX_comm_copy_data(action);
586 case SIMIX_SRC_TIMEOUT:
588 THROWF(timeout_error, 0, "Communication timeouted because of sender");
590 CATCH(req->issuer->running_ctx->exception) {
591 req->issuer->doexception = 1;
595 case SIMIX_DST_TIMEOUT:
597 THROWF(timeout_error, 0, "Communication timeouted because of receiver");
599 CATCH(req->issuer->running_ctx->exception) {
600 req->issuer->doexception = 1;
604 case SIMIX_SRC_HOST_FAILURE:
606 if (req->issuer == action->comm.src_proc)
607 THROWF(host_error, 0, "Host failed");
609 THROWF(network_error, 0, "Remote peer failed");
611 CATCH(req->issuer->running_ctx->exception) {
612 req->issuer->doexception = 1;
616 case SIMIX_DST_HOST_FAILURE:
618 if (req->issuer == action->comm.dst_proc)
619 THROWF(host_error, 0, "Host failed");
621 THROWF(network_error, 0, "Remote peer failed");
623 CATCH(req->issuer->running_ctx->exception) {
624 req->issuer->doexception = 1;
628 case SIMIX_LINK_FAILURE:
630 XBT_DEBUG("Link failure in action %p between '%s' and '%s': posting an exception to the issuer: %s (%p)",
632 action->comm.src_proc ? action->comm.src_proc->smx_host->name : NULL,
633 action->comm.dst_proc ? action->comm.dst_proc->smx_host->name : NULL,
634 req->issuer->name, req->issuer);
635 THROWF(network_error, 0, "Link failure");
637 CATCH(req->issuer->running_ctx->exception) {
638 req->issuer->doexception = 1;
644 if (req->issuer == action->comm.dst_proc) {
645 THROWF(cancel_error, 0, "Communication canceled by the sender");
648 THROWF(cancel_error, 0, "Communication canceled by the receiver");
651 CATCH(req->issuer->running_ctx->exception) {
652 req->issuer->doexception = 1;
657 xbt_die("Unexpected action state in SIMIX_comm_finish: %d", action->state);
660 /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */
661 if (req->issuer->doexception) {
662 if (req->call == REQ_COMM_WAITANY) {
663 req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_waitany.comms, &action);
665 else if (req->call == REQ_COMM_TESTANY) {
666 req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_testany.comms, &action);
670 req->issuer->waiting_action = NULL;
671 SIMIX_request_answer(req);
675 while (destroy_count-- > 0)
676 SIMIX_comm_destroy(action);
680 * \brief This function is called when a Surf communication action is finished.
681 * \param action the corresponding Simix communication
683 void SIMIX_post_comm(smx_action_t action)
685 /* Update action state */
686 if (action->comm.src_timeout &&
687 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_DONE)
688 action->state = SIMIX_SRC_TIMEOUT;
689 else if (action->comm.dst_timeout &&
690 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_DONE)
691 action->state = SIMIX_DST_TIMEOUT;
692 else if (action->comm.src_timeout &&
693 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_FAILED)
694 action->state = SIMIX_SRC_HOST_FAILURE;
695 else if (action->comm.dst_timeout &&
696 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_FAILED)
697 action->state = SIMIX_DST_HOST_FAILURE;
698 else if (action->comm.surf_comm &&
699 surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED)
700 action->state = SIMIX_LINK_FAILURE;
702 action->state = SIMIX_DONE;
704 XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d",
705 action, action->state, action->comm.src_proc, action->comm.dst_proc, action->comm.detached);
707 /* destroy the surf actions associated with the Simix communication */
708 SIMIX_comm_destroy_internal_actions(action);
710 /* remove the communication action from the list of pending communications
711 * of both processes (if they still exist) */
712 if (action->comm.src_proc) {
713 xbt_fifo_remove(action->comm.src_proc->comms, action);
715 if (action->comm.dst_proc) {
716 xbt_fifo_remove(action->comm.dst_proc->comms, action);
719 /* if there are requests associated with the action, then answer them */
720 if (xbt_fifo_size(action->request_list)) {
721 SIMIX_comm_finish(action);
725 void SIMIX_comm_cancel(smx_action_t action)
727 /* if the action is a waiting state means that it is still in a rdv */
728 /* so remove from it and delete it */
729 if (action->state == SIMIX_WAITING) {
730 SIMIX_rdv_remove(action->comm.rdv, action);
731 action->state = SIMIX_CANCELED;
733 else if (!MC_IS_ENABLED /* when running the MC there are no surf actions */
734 && (action->state == SIMIX_READY || action->state == SIMIX_RUNNING)) {
736 surf_workstation_model->action_cancel(action->comm.surf_comm);
740 void SIMIX_comm_suspend(smx_action_t action)
742 /*FIXME: shall we suspend also the timeout actions? */
743 surf_workstation_model->suspend(action->comm.surf_comm);
746 void SIMIX_comm_resume(smx_action_t action)
748 /*FIXME: check what happen with the timeouts */
749 surf_workstation_model->resume(action->comm.surf_comm);
753 /************* Action Getters **************/
756 * \brief get the amount remaining from the communication
757 * \param action The communication
759 double SIMIX_comm_get_remains(smx_action_t action)
767 switch (action->state) {
770 remains = surf_workstation_model->get_remains(action->comm.surf_comm);
775 remains = 0; /*FIXME: check what should be returned */
779 remains = 0; /*FIXME: is this correct? */
785 e_smx_state_t SIMIX_comm_get_state(smx_action_t action)
787 return action->state;
791 * \brief Return the user data associated to the sender of the communication
792 * \param action The communication
793 * \return the user data
795 void* SIMIX_comm_get_src_data(smx_action_t action)
797 return action->comm.src_data;
801 * \brief Return the user data associated to the receiver of the communication
802 * \param action The communication
803 * \return the user data
805 void* SIMIX_comm_get_dst_data(smx_action_t action)
807 return action->comm.dst_data;
810 smx_process_t SIMIX_comm_get_src_proc(smx_action_t action)
812 return action->comm.src_proc;
815 smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action)
817 return action->comm.dst_proc;
820 #ifdef HAVE_LATENCY_BOUND_TRACKING
822 * \brief verify if communication is latency bounded
823 * \param comm The communication
825 XBT_INLINE int SIMIX_comm_is_latency_bounded(smx_action_t action)
830 if (action->comm.surf_comm){
831 XBT_DEBUG("Getting latency limited for surf_action (%p)", action->comm.surf_comm);
832 action->latency_limited = surf_workstation_model->get_latency_limited(action->comm.surf_comm);
833 XBT_DEBUG("Action limited is %d", action->latency_limited);
835 return action->latency_limited;
839 /******************************************************************************/
840 /* SIMIX_comm_copy_data callbacks */
841 /******************************************************************************/
842 static void (*SIMIX_comm_copy_data_callback) (smx_action_t, size_t) =
843 &SIMIX_comm_copy_pointer_callback;
846 SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t))
848 SIMIX_comm_copy_data_callback = callback;
851 void SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size)
853 xbt_assert((buff_size == sizeof(void *)),
854 "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
855 *(void **) (comm->comm.dst_buff) = comm->comm.src_buff;
858 void SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size)
860 memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size);
864 * \brief Copy the communication data from the sender's buffer to the receiver's one
865 * \param comm The communication
867 void SIMIX_comm_copy_data(smx_action_t comm)
869 size_t buff_size = comm->comm.src_buff_size;
870 /* If there is no data to be copy then return */
871 if (!comm->comm.src_buff || !comm->comm.dst_buff || comm->comm.copied == 1)
874 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)",
876 comm->comm.src_proc->smx_host->name, comm->comm.src_buff,
877 comm->comm.dst_proc->smx_host->name, comm->comm.dst_buff, buff_size);
879 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
880 if (comm->comm.dst_buff_size)
881 buff_size = MIN(buff_size, *(comm->comm.dst_buff_size));
883 /* Update the receiver's buffer size to the copied amount */
884 if (comm->comm.dst_buff_size)
885 *comm->comm.dst_buff_size = buff_size;
890 (*SIMIX_comm_copy_data_callback) (comm, buff_size);
892 /* Set the copied flag so we copy data only once */
893 /* (this function might be called from both communication ends) */
894 comm->comm.copied = 1;