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 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 volatile 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 xbt_fifo_remove(req->issuer->comms, action);
672 SIMIX_request_answer(req);
676 while (destroy_count-- > 0)
677 SIMIX_comm_destroy(action);
681 * \brief This function is called when a Surf communication action is finished.
682 * \param action the corresponding Simix communication
684 void SIMIX_post_comm(smx_action_t action)
686 /* Update action state */
687 if (action->comm.src_timeout &&
688 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_DONE)
689 action->state = SIMIX_SRC_TIMEOUT;
690 else if (action->comm.dst_timeout &&
691 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_DONE)
692 action->state = SIMIX_DST_TIMEOUT;
693 else if (action->comm.src_timeout &&
694 surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_FAILED)
695 action->state = SIMIX_SRC_HOST_FAILURE;
696 else if (action->comm.dst_timeout &&
697 surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_FAILED)
698 action->state = SIMIX_DST_HOST_FAILURE;
699 else if (action->comm.surf_comm &&
700 surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED)
701 action->state = SIMIX_LINK_FAILURE;
703 action->state = SIMIX_DONE;
705 XBT_DEBUG("SIMIX_post_comm: comm %p, state %d, src_proc %p, dst_proc %p, detached: %d",
706 action, action->state, action->comm.src_proc, action->comm.dst_proc, action->comm.detached);
708 /* destroy the surf actions associated with the Simix communication */
709 SIMIX_comm_destroy_internal_actions(action);
711 /* remove the communication action from the list of pending communications
712 * of both processes (if they still exist) */
713 if (action->comm.src_proc) {
714 xbt_fifo_remove(action->comm.src_proc->comms, action);
716 if (action->comm.dst_proc) {
717 xbt_fifo_remove(action->comm.dst_proc->comms, action);
720 /* if there are requests associated with the action, then answer them */
721 if (xbt_fifo_size(action->request_list)) {
722 SIMIX_comm_finish(action);
726 void SIMIX_comm_cancel(smx_action_t action)
728 /* if the action is a waiting state means that it is still in a rdv */
729 /* so remove from it and delete it */
730 if (action->state == SIMIX_WAITING) {
731 SIMIX_rdv_remove(action->comm.rdv, action);
732 action->state = SIMIX_CANCELED;
734 else if (!MC_IS_ENABLED /* when running the MC there are no surf actions */
735 && (action->state == SIMIX_READY || action->state == SIMIX_RUNNING)) {
737 surf_workstation_model->action_cancel(action->comm.surf_comm);
741 void SIMIX_comm_suspend(smx_action_t action)
743 /*FIXME: shall we suspend also the timeout actions? */
744 surf_workstation_model->suspend(action->comm.surf_comm);
747 void SIMIX_comm_resume(smx_action_t action)
749 /*FIXME: check what happen with the timeouts */
750 surf_workstation_model->resume(action->comm.surf_comm);
754 /************* Action Getters **************/
757 * \brief get the amount remaining from the communication
758 * \param action The communication
760 double SIMIX_comm_get_remains(smx_action_t action)
768 switch (action->state) {
771 remains = surf_workstation_model->get_remains(action->comm.surf_comm);
776 remains = 0; /*FIXME: check what should be returned */
780 remains = 0; /*FIXME: is this correct? */
786 e_smx_state_t SIMIX_comm_get_state(smx_action_t action)
788 return action->state;
792 * \brief Return the user data associated to the sender of the communication
793 * \param action The communication
794 * \return the user data
796 void* SIMIX_comm_get_src_data(smx_action_t action)
798 return action->comm.src_data;
802 * \brief Return the user data associated to the receiver of the communication
803 * \param action The communication
804 * \return the user data
806 void* SIMIX_comm_get_dst_data(smx_action_t action)
808 return action->comm.dst_data;
811 smx_process_t SIMIX_comm_get_src_proc(smx_action_t action)
813 return action->comm.src_proc;
816 smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action)
818 return action->comm.dst_proc;
821 #ifdef HAVE_LATENCY_BOUND_TRACKING
823 * \brief verify if communication is latency bounded
824 * \param comm The communication
826 XBT_INLINE int SIMIX_comm_is_latency_bounded(smx_action_t action)
831 if (action->comm.surf_comm){
832 XBT_DEBUG("Getting latency limited for surf_action (%p)", action->comm.surf_comm);
833 action->latency_limited = surf_workstation_model->get_latency_limited(action->comm.surf_comm);
834 XBT_DEBUG("Action limited is %d", action->latency_limited);
836 return action->latency_limited;
840 /******************************************************************************/
841 /* SIMIX_comm_copy_data callbacks */
842 /******************************************************************************/
843 static void (*SIMIX_comm_copy_data_callback) (smx_action_t, size_t) =
844 &SIMIX_comm_copy_pointer_callback;
847 SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t))
849 SIMIX_comm_copy_data_callback = callback;
852 void SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size)
854 xbt_assert((buff_size == sizeof(void *)),
855 "Cannot copy %zu bytes: must be sizeof(void*)", buff_size);
856 *(void **) (comm->comm.dst_buff) = comm->comm.src_buff;
859 void SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size)
861 memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size);
865 * \brief Copy the communication data from the sender's buffer to the receiver's one
866 * \param comm The communication
868 void SIMIX_comm_copy_data(smx_action_t comm)
870 size_t buff_size = comm->comm.src_buff_size;
871 /* If there is no data to be copy then return */
872 if (!comm->comm.src_buff || !comm->comm.dst_buff || comm->comm.copied == 1)
875 XBT_DEBUG("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)",
877 comm->comm.src_proc->smx_host->name, comm->comm.src_buff,
878 comm->comm.dst_proc->smx_host->name, comm->comm.dst_buff, buff_size);
880 /* Copy at most dst_buff_size bytes of the message to receiver's buffer */
881 if (comm->comm.dst_buff_size)
882 buff_size = MIN(buff_size, *(comm->comm.dst_buff_size));
884 /* Update the receiver's buffer size to the copied amount */
885 if (comm->comm.dst_buff_size)
886 *comm->comm.dst_buff_size = buff_size;
891 SIMIX_comm_copy_data_callback(comm, buff_size);
893 /* Set the copied flag so we copy data only once */
894 /* (this function might be called from both communication ends) */
895 comm->comm.copied = 1;