X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/7cb1f8f04ea7ad3bf6a0eedec6f8e28e3f961970..31b7fa457f9267af8eda2eee06aae74dd78eb412:/src/simix/smx_network.c diff --git a/src/simix/smx_network.c b/src/simix/smx_network.c index 3c3ef25962..11b84c6d64 100644 --- a/src/simix/smx_network.c +++ b/src/simix/smx_network.c @@ -9,47 +9,89 @@ #include "mc/mc.h" #include "xbt/dict.h" -/* Pimple to get an histogram of message sizes in the simulation */ -xbt_dict_t msg_sizes = NULL; -#ifdef HAVE_LATENCY_BOUND_TRACKING -xbt_dict_t latency_limited_dict = NULL; -#endif - XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_network, simix, "Logging specific to SIMIX (network)"); +static xbt_dict_t rdv_points = NULL; + +static XBT_INLINE void SIMIX_comm_start(smx_action_t action); +static void SIMIX_comm_finish(smx_action_t action); +static void SIMIX_waitany_req_remove_from_actions(smx_req_t req); +static void SIMIX_comm_copy_data(smx_action_t comm); +static smx_action_t SIMIX_comm_new(e_smx_comm_type_t type); +static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm); +static XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm); +static smx_action_t SIMIX_rdv_get_request(smx_rdv_t rdv, e_smx_comm_type_t type, + int (*match_fun)(void *, void *), void *); +static void SIMIX_rdv_free(void *data); + +void SIMIX_network_init(void) +{ + rdv_points = xbt_dict_new(); +} + +void SIMIX_network_exit(void) +{ + xbt_dict_free(&rdv_points); +} + /******************************************************************************/ /* Rendez-Vous Points */ -/******************************************************************************/ +/******************************************************************************/ -/** - * \brief Creates a new rendez-vous point - * \param name The name of the rendez-vous point - * \return The created rendez-vous point - */ smx_rdv_t SIMIX_rdv_create(const char *name) { - smx_rdv_t rdv = xbt_new0(s_smx_rvpoint_t, 1); - rdv->name = name ? xbt_strdup(name) : NULL; - rdv->read = SIMIX_mutex_init(); - rdv->write = SIMIX_mutex_init(); - rdv->comm_fifo = xbt_fifo_new(); + /* two processes may have pushed the same rdv_create request at the same time */ + smx_rdv_t rdv = name ? xbt_dict_get_or_null(rdv_points, name) : NULL; + + if (!rdv) { + rdv = xbt_new0(s_smx_rvpoint_t, 1); + rdv->name = name ? xbt_strdup(name) : NULL; + rdv->comm_fifo = xbt_fifo_new(); + if (rdv->name) + xbt_dict_set(rdv_points, rdv->name, rdv, SIMIX_rdv_free); + } return rdv; } -/** - * \brief Destroy a rendez-vous point - * \param name The rendez-vous point to destroy - */ void SIMIX_rdv_destroy(smx_rdv_t rdv) { - if(rdv->name) + if (rdv->name) + xbt_dict_remove(rdv_points, rdv->name); +} + +void SIMIX_rdv_free(void *data) +{ + smx_rdv_t rdv = (smx_rdv_t) data; + if (rdv->name) xbt_free(rdv->name); - SIMIX_mutex_destroy(rdv->read); - SIMIX_mutex_destroy(rdv->write); xbt_fifo_free(rdv->comm_fifo); - xbt_free(rdv); + xbt_free(rdv); +} + +smx_rdv_t SIMIX_rdv_get_by_name(const char *name) +{ + return xbt_dict_get_or_null(rdv_points, name); +} + +int SIMIX_rdv_comm_count_by_host(smx_rdv_t rdv, smx_host_t host) +{ + smx_action_t comm = NULL; + xbt_fifo_item_t item = NULL; + int count = 0; + + xbt_fifo_foreach(rdv->comm_fifo, item, comm, smx_action_t) { + if (comm->comm.src_proc->smx_host == host) + count++; + } + + return count; +} + +smx_action_t SIMIX_rdv_get_head(smx_rdv_t rdv) +{ + return xbt_fifo_get_item_content(xbt_fifo_get_first_item(rdv->comm_fifo)); } /** @@ -57,10 +99,10 @@ void SIMIX_rdv_destroy(smx_rdv_t rdv) * \param rdv The rendez-vous point * \param comm The communication request */ -static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_comm_t comm) +static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm) { xbt_fifo_push(rdv->comm_fifo, comm); - comm->rdv = rdv; + comm->comm.rdv = rdv; } /** @@ -68,602 +110,716 @@ static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_comm_t comm) * \param rdv The rendez-vous point * \param comm The communication request */ -static XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_comm_t comm) +static XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm) { xbt_fifo_remove(rdv->comm_fifo, comm); - comm->rdv = NULL; + comm->comm.rdv = NULL; } - + /** - * \brief Checks if there is a communication request queued in a rendez-vous matching our needs + * \brief Checks if there is a communication action queued in a rendez-vous matching our needs * \param type The type of communication we are looking for (comm_send, comm_recv) - * \return The communication request if found, NULL otherwise. + * \return The communication action if found, NULL otherwise */ -smx_comm_t SIMIX_rdv_get_request(smx_rdv_t rdv, smx_comm_type_t type) { - smx_comm_t comm = (smx_comm_t)xbt_fifo_get_item_content( - xbt_fifo_get_first_item(rdv->comm_fifo)); - - if(comm && comm->type == type){ - DEBUG0("Communication request found!"); - xbt_fifo_shift(rdv->comm_fifo); - SIMIX_communication_use(comm); - comm->rdv = NULL; - return comm; +smx_action_t SIMIX_rdv_get_request(smx_rdv_t rdv, e_smx_comm_type_t type, + int (*match_fun)(void *, void *), void *data) +{ + smx_action_t action; + xbt_fifo_item_t item; + void* req_data = NULL; + + xbt_fifo_foreach(rdv->comm_fifo, item, action, smx_action_t){ + if (action->comm.type == SIMIX_COMM_SEND) { + req_data = action->comm.src_data; + } else if (action->comm.type == SIMIX_COMM_RECEIVE) { + req_data = action->comm.dst_data; + } + if (action->comm.type == type && (!match_fun || match_fun(data, req_data))) { + DEBUG1("Found a matching communication action %p", action); + xbt_fifo_remove_item(rdv->comm_fifo, item); + xbt_fifo_free_item(item); + action->comm.refcount++; + action->comm.rdv = NULL; + return action; + } + DEBUG3("Sorry, communication action %p does not match our needs:" + " its type is %d but we are looking for a comm of type %d", + action, action->comm.type, type); } - - DEBUG0("Communication request not found"); + DEBUG0("No matching communication action found"); return NULL; } +/******************************************************************************/ +/* Comunication Actions */ +/******************************************************************************/ + /** - * \brief counts the number of communication requests of a given host pending - * on a rendez-vous point - * \param rdv The rendez-vous point - * \param host The host to be counted - * \return The number of comm request pending in the rdv + * \brief Creates a new comunicate action + * \param type The type of request (comm_send, comm_recv) + * \return The new comunicate action */ -int -SIMIX_rdv_get_count_waiting_comm(smx_rdv_t rdv, smx_host_t host) +smx_action_t SIMIX_comm_new(e_smx_comm_type_t type) { - smx_comm_t comm = NULL; - xbt_fifo_item_t item = NULL; - int count = 0; + smx_action_t act; - xbt_fifo_foreach(rdv->comm_fifo, item, comm, smx_comm_t) { - if (comm->src_proc->smx_host == host) - count++; - } + /* alloc structures */ + act = xbt_new0(s_smx_action_t, 1); + act->type = SIMIX_ACTION_COMMUNICATE; + act->state = SIMIX_WAITING; + act->request_list = xbt_fifo_new(); - return count; + /* set communication */ + act->comm.type = type; + act->comm.refcount = 1; + +#ifdef HAVE_LATENCY_BOUND_TRACKING + //initialize with unknown value + act->latency_limited = -1; +#endif + +#ifdef HAVE_TRACING + act->category = NULL; +#endif + + DEBUG1("Create communicate action %p", act); + + return act; } /** - * \brief returns the communication at the head of the rendez-vous - * \param rdv The rendez-vous point - * \return The communication or NULL if empty + * \brief Destroy a communicate action + * \param action The communicate action to be destroyed */ -XBT_INLINE smx_comm_t SIMIX_rdv_get_head(smx_rdv_t rdv) +void SIMIX_comm_destroy(smx_action_t action) { - return (smx_comm_t)xbt_fifo_get_item_content(xbt_fifo_get_first_item(rdv->comm_fifo)); -} + DEBUG2("Destroy action %p (refcount:%d)", action, action->comm.refcount); -/** @brief adds some API-related data to the rendez-vous point */ -XBT_INLINE void SIMIX_rdv_set_data(smx_rdv_t rdv,void *data) { - rdv->data=data; -} -/** @brief gets API-related data from the rendez-vous point */ -XBT_INLINE void *SIMIX_rdv_get_data(smx_rdv_t rdv) { - return rdv->data; + if (action->comm.refcount <= 0) + xbt_die(bprintf("the refcount of comm %p is already 0 before decreasing it. That's a bug!",action)); + + action->comm.refcount--; + if (action->comm.refcount > 0) + return; + DEBUG2("Really free communication %p; refcount is now %d", action, + action->comm.refcount); + +#ifdef HAVE_LATENCY_BOUND_TRACKING + action->latency_limited = SIMIX_comm_is_latency_bounded( action ) ; +#endif + +#ifdef HAVE_TRACING + TRACE_smx_action_destroy(action); +#endif + + if (action->name) + xbt_free(action->name); + + xbt_fifo_free(action->request_list); + + SIMIX_comm_destroy_internal_actions(action); + + xbt_free(action); } -/******************************************************************************/ -/* Communication Requests */ -/******************************************************************************/ +void SIMIX_comm_destroy_internal_actions(smx_action_t action) +{ + if (action->comm.surf_comm){ +#ifdef HAVE_LATENCY_BOUND_TRACKING + action->latency_limited = SIMIX_comm_is_latency_bounded(action); +#endif + action->comm.surf_comm->model_type->action_unref(action->comm.surf_comm); + action->comm.surf_comm = NULL; + } -/** - * \brief Creates a new communication request - * \param type The type of communication (comm_send, comm_recv) - * \return The new communication request - */ -smx_comm_t SIMIX_communication_new(smx_comm_type_t type) + if (action->comm.src_timeout){ + action->comm.src_timeout->model_type->action_unref(action->comm.src_timeout); + action->comm.src_timeout = NULL; + } + + if (action->comm.dst_timeout){ + action->comm.dst_timeout->model_type->action_unref(action->comm.dst_timeout); + action->comm.dst_timeout = NULL; + } +} + +smx_action_t SIMIX_comm_isend(smx_process_t src_proc, smx_rdv_t rdv, + double task_size, double rate, + void *src_buff, size_t src_buff_size, + int (*match_fun)(void *, void *), void *data, + int detached) { - /* alloc structures */ - smx_comm_t comm = xbt_new0(s_smx_comm_t, 1); - comm->type = type; - comm->sem = SIMIX_sem_init(0); - comm->refcount = 1; - - return comm; + smx_action_t action; + + /* Look for communication request matching our needs. + If it is not found then create it and push it into the rendez-vous point */ + action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_RECEIVE, match_fun, data); + + if (!action) { + action = SIMIX_comm_new(SIMIX_COMM_SEND); + SIMIX_rdv_push(rdv, action); + } else { + action->state = SIMIX_READY; + action->comm.type = SIMIX_COMM_READY; + } + + /* If the communication action is detached then decrease the refcount + * by one, so it will be eliminated by the receivers destroy call */ + if(detached) + action->comm.refcount--; + + /* Setup the communication request */ + action->comm.src_proc = src_proc; + action->comm.task_size = task_size; + action->comm.rate = rate; + action->comm.src_buff = src_buff; + action->comm.src_buff_size = src_buff_size; + action->comm.src_data = data; + + if (MC_IS_ENABLED) { + action->state = SIMIX_RUNNING; + return action; + } + + SIMIX_comm_start(action); + return action; } -/** - * \brief Destroy a communication request - * \param comm The request to be destroyed - */ -void SIMIX_communication_destroy(smx_comm_t comm) +smx_action_t SIMIX_comm_irecv(smx_process_t dst_proc, smx_rdv_t rdv, + void *dst_buff, size_t *dst_buff_size, + int (*match_fun)(void *, void *), void *data) { - VERB2("Destroy communication %p; refcount initially %d",comm,comm->refcount); + smx_action_t action; -#ifdef HAVE_LATENCY_BOUND_TRACKING - //save is latency limited flag to use afterwards - if (latency_limited_dict == NULL) { - latency_limited_dict = xbt_dict_new(); + /* Look for communication request matching our needs. + * If it is not found then create it and push it into the rendez-vous point + */ + action = SIMIX_rdv_get_request(rdv, SIMIX_COMM_SEND, match_fun, data); + + if (!action) { + action = SIMIX_comm_new(SIMIX_COMM_RECEIVE); + SIMIX_rdv_push(rdv, action); + } else { + action->state = SIMIX_READY; + action->comm.type = SIMIX_COMM_READY; } - if (comm->act){ - DEBUG2("adding key %p with latency limited value %d to the dict", comm, SIMIX_action_is_latency_bounded(comm->act)); - xbt_dicti_set(latency_limited_dict, (uintptr_t)comm, SIMIX_action_is_latency_bounded(comm->act)); + + /* Setup communication request */ + action->comm.dst_proc = dst_proc; + action->comm.dst_buff = dst_buff; + action->comm.dst_buff_size = dst_buff_size; + action->comm.dst_data = data; + + if (MC_IS_ENABLED) { + action->state = SIMIX_RUNNING; + return action; } -#endif - comm->refcount--; - if(comm->refcount > 0) + SIMIX_comm_start(action); + return action; +} + +void SIMIX_pre_comm_wait(smx_req_t req, int idx) +{ + smx_action_t action = req->comm_wait.comm; + double timeout = req->comm_wait.timeout; + surf_action_t sleep; + + /* Associate this request to the action */ + xbt_fifo_push(action->request_list, req); + req->issuer->waiting_action = action; + + if (MC_IS_ENABLED){ + if(idx == 0){ + action->state = SIMIX_DONE; + }else{ + /* If we reached this point, the wait request must have a timeout */ + /* Otherwise it shouldn't be enabled and executed by the MC */ + if(timeout == -1) + THROW_IMPOSSIBLE; + + if(action->comm.src_proc == req->issuer) + action->state = SIMIX_SRC_TIMEOUT; + else + action->state = SIMIX_DST_TIMEOUT; + } + + SIMIX_comm_finish(action); return; + } - if(comm->sem){ - SIMIX_sem_destroy(comm->sem); - comm->sem = NULL; + /* If the action has already finish perform the error handling, */ + /* otherwise set up a waiting timeout on the right side */ + if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) { + SIMIX_comm_finish(action); + } 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 */ + sleep = surf_workstation_model->extension.workstation.sleep(req->issuer->smx_host->host, timeout); + surf_workstation_model->action_data_set(sleep, action); + + if (req->issuer == action->comm.src_proc) + action->comm.src_timeout = sleep; + else + action->comm.dst_timeout = sleep; } - - if(comm->act){ - SIMIX_action_destroy(comm->act); - comm->act = NULL; +} + +void SIMIX_pre_comm_test(smx_req_t req) +{ + smx_action_t action = req->comm_test.comm; + + if(MC_IS_ENABLED){ + req->comm_test.result = action->comm.src_proc && action->comm.dst_proc; + if(req->comm_test.result){ + action->state = SIMIX_DONE; + xbt_fifo_push(action->request_list, req); + SIMIX_comm_finish(action); + }else{ + SIMIX_request_answer(req); + } + return; } - if(comm->src_timeout){ - SIMIX_action_destroy(comm->src_timeout); - comm->src_timeout = NULL; + req->comm_test.result = (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING); + if (req->comm_test.result) { + xbt_fifo_push(action->request_list, req); + SIMIX_comm_finish(action); + } else { + SIMIX_request_answer(req); } +} - if(comm->dst_timeout){ - SIMIX_action_destroy(comm->dst_timeout); - comm->dst_timeout = NULL; +void SIMIX_pre_comm_testany(smx_req_t req, int idx) +{ + unsigned int cursor; + smx_action_t action; + xbt_dynar_t actions = req->comm_testany.comms; + req->comm_testany.result = -1; + + if (MC_IS_ENABLED){ + if(idx == -1){ + SIMIX_request_answer(req); + }else{ + action = xbt_dynar_get_as(actions, idx, smx_action_t); + req->comm_testany.result = idx; + xbt_fifo_push(action->request_list, req); + action->state = SIMIX_DONE; + SIMIX_comm_finish(action); } + return; + } + xbt_dynar_foreach(req->comm_testany.comms,cursor,action) { + if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING) { + req->comm_testany.result = cursor; + xbt_fifo_push(action->request_list, req); + SIMIX_comm_finish(action); + return; + } + } + SIMIX_request_answer(req); +} +void SIMIX_pre_comm_waitany(smx_req_t req, int idx) +{ + smx_action_t action; + unsigned int cursor = 0; + xbt_dynar_t actions = req->comm_waitany.comms; + + if (MC_IS_ENABLED){ + action = xbt_dynar_get_as(actions, idx, smx_action_t); + xbt_fifo_push(action->request_list, req); + req->comm_waitany.result = idx; + action->state = SIMIX_DONE; + SIMIX_comm_finish(action); + return; + } - xbt_free(comm); + xbt_dynar_foreach(actions, cursor, action){ + /* Associate this request to the action */ + xbt_fifo_push(action->request_list, req); + if (action->state != SIMIX_WAITING && action->state != SIMIX_RUNNING){ + SIMIX_comm_finish(action); + break; + } + } } -/** - * \brief Increase the number of users of the communication. - * \param comm The communication request - * Each communication request can be used by more than one process, so it is - * necessary to know number of them at destroy time, to avoid freeing stuff that - * maybe is in use by others. - * \ - */ -static XBT_INLINE void SIMIX_communication_use(smx_comm_t comm) +void SIMIX_waitany_req_remove_from_actions(smx_req_t req) { - comm->refcount++; + smx_action_t action; + unsigned int cursor = 0; + xbt_dynar_t actions = req->comm_waitany.comms; + + xbt_dynar_foreach(actions, cursor, action){ + xbt_fifo_remove(action->request_list, req); + } } /** * \brief Start the simulation of a communication request - * \param comm The communication request + * \param action The communication action */ -static XBT_INLINE void SIMIX_communication_start(smx_comm_t comm) +static XBT_INLINE void SIMIX_comm_start(smx_action_t action) { /* If both the sender and the receiver are already there, start the communication */ - if(comm->src_proc && comm->dst_proc){ - DEBUG1("Starting communication %p", comm); - comm->act = SIMIX_action_communicate(comm->src_proc->smx_host, - comm->dst_proc->smx_host, NULL, - comm->task_size, comm->rate); + if (action->state == SIMIX_READY) { + smx_host_t sender = action->comm.src_proc->smx_host; + smx_host_t receiver = action->comm.dst_proc->smx_host; + + DEBUG3("Starting communication %p from '%s' to '%s'", action, + SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver)); + + action->comm.surf_comm = surf_workstation_model->extension.workstation. + communicate(sender->host, receiver->host, action->comm.task_size, action->comm.rate); + + surf_workstation_model->action_data_set(action->comm.surf_comm, action); + + action->state = SIMIX_RUNNING; + #ifdef HAVE_TRACING - TRACE_smx_action_communicate (comm->act, comm->src_proc); + TRACE_smx_action_communicate(action, action->comm.src_proc); #endif + /* If a link is failed, detect it immediately */ + if (surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) { + DEBUG2("Communication from '%s' to '%s' failed to start because of a link failure", + SIMIX_host_get_name(sender), SIMIX_host_get_name(receiver)); + action->state = SIMIX_LINK_FAILURE; + SIMIX_comm_destroy_internal_actions(action); + } + /* If any of the process is suspend, create the action but stop its execution, it will be restarted when the sender process resume */ - if(SIMIX_process_is_suspended(comm->src_proc) || - SIMIX_process_is_suspended(comm->dst_proc)) { - SIMIX_action_suspend(comm->act); + if (SIMIX_process_is_suspended(action->comm.src_proc) || + SIMIX_process_is_suspended(action->comm.dst_proc)) { + /* FIXME: check what should happen with the action state */ + surf_workstation_model->suspend(action->comm.surf_comm); } - - /* Add the communication as user data of the action */ - comm->act->data = comm; - - /* The semaphore will only get signaled once, but since the first unlocked guy will - * release_forever() the semaphore, that will unlock the second (and any other) - * communication partner */ - SIMIX_register_action_to_semaphore(comm->act, comm->sem); } } -/** - * \brief Performs error checking and cleanup - * \param comm The communication - */ -static XBT_INLINE void SIMIX_communication_cleanup(smx_comm_t comm) -{ - DEBUG1("Checking errors and cleaning communication %p", comm); - - /* Make sure that everyone sleeping on that semaphore is awake, and that nobody will ever block on it */ - SIMIX_sem_release_forever(comm->sem); - - /* Check for errors other than timeouts */ - if (!SIMIX_host_get_state(SIMIX_host_self())){ - if(comm->rdv) - SIMIX_rdv_remove(comm->rdv, comm); - SIMIX_communication_destroy(comm); - THROW0(host_error, 0, "Host failed"); - } else if (SIMIX_action_get_state(comm->act) == SURF_ACTION_FAILED){ - SIMIX_communication_destroy(comm); - THROW0(network_error, 0, "Link failure"); - } else if (!SIMIX_host_get_state(SIMIX_process_get_host(comm->dst_proc)) || - !SIMIX_host_get_state(SIMIX_process_get_host(comm->src_proc))) { - /* We test both src&dst because we dunno who we are today, and we already tested myself above. - * So, at the end, we test the remote peer only - * Moreover, we have to test it because if the remote peer fails, the action comm->act is not done nor failed. - * In that case, we got awaken by the little endless actions created in the SIMIX_sem_acquire(comm->sem) - * at the beginning of this function. */ - SIMIX_communication_destroy(comm); - THROW0(network_error, 0, "Remote peer failed"); +void SIMIX_comm_finish(smx_action_t action) +{ + smx_req_t req; + + while ((req = xbt_fifo_shift(action->request_list))) { + + /* If a waitany request is waiting for this action to finish, then remove + it from the other actions in the waitany list. Afterwards, get the + position of the actual action in the waitany request's actions dynar and + return it as the result of the call */ + if (req->call == REQ_COMM_WAITANY) { + SIMIX_waitany_req_remove_from_actions(req); + if(!MC_IS_ENABLED) + req->comm_waitany.result = xbt_dynar_search(req->comm_waitany.comms, &action); + } - } - /* Copy network data */ - SIMIX_network_copy_data(comm); + /* If the action is still in a rendez-vous point then remove from it */ + if (action->comm.rdv) + SIMIX_rdv_remove(action->comm.rdv, action); + + DEBUG1("SIMIX_comm_finish: action state = %d", action->state); + + /* Check out for errors */ + switch (action->state) { + + case SIMIX_DONE: + DEBUG1("Communication %p complete!", action); + SIMIX_comm_copy_data(action); + break; + + case SIMIX_SRC_TIMEOUT: + TRY { + THROW0(timeout_error, 0, "Communication timeouted because of sender"); + } + CATCH(req->issuer->running_ctx->exception) { + req->issuer->doexception = 1; + } + break; + + case SIMIX_DST_TIMEOUT: + TRY { + THROW0(timeout_error, 0, "Communication timeouted because of receiver"); + } + CATCH(req->issuer->running_ctx->exception) { + req->issuer->doexception = 1; + } + break; + + case SIMIX_SRC_HOST_FAILURE: + TRY { + if (req->issuer == action->comm.src_proc) + THROW0(host_error, 0, "Host failed"); + else + THROW0(network_error, 0, "Remote peer failed"); + } + CATCH(req->issuer->running_ctx->exception) { + req->issuer->doexception = 1; + } + break; + + case SIMIX_DST_HOST_FAILURE: + TRY { + if (req->issuer == action->comm.dst_proc) + THROW0(host_error, 0, "Host failed"); + else + THROW0(network_error, 0, "Remote peer failed"); + } + CATCH(req->issuer->running_ctx->exception) { + req->issuer->doexception = 1; + } + break; + + case SIMIX_LINK_FAILURE: + TRY { + DEBUG5("Link failure in action %p between '%s' and '%s': posting an exception to the issuer: %s (%p)", + action, action->comm.src_proc->smx_host->name, action->comm.dst_proc->smx_host->name, + req->issuer->name, req->issuer); + THROW0(network_error, 0, "Link failure"); + } + CATCH(req->issuer->running_ctx->exception) { + req->issuer->doexception = 1; + } + break; + + default: + THROW_IMPOSSIBLE; + } - SIMIX_communication_destroy(comm); -} + /* if there is an exception during a waitany or a testany, indicate the position of the failed communication */ + if (req->issuer->doexception) { + if (req->call == REQ_COMM_WAITANY) { + req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_waitany.comms, &action); + } + else if (req->call == REQ_COMM_TESTANY) { + req->issuer->running_ctx->exception.value = xbt_dynar_search(req->comm_testany.comms, &action); + } + } -/** - * \brief Waits for communication completion - * \param comm The communication - * \param timeout The max amount of time to wait for the communication to finish - * - * Throws: - * - host_error if local peer failed - * - timeout_error if communication reached the timeout specified (either because of local peer or remote peer) - * - network_error if network failed or remote peer failed - */ -static XBT_INLINE void SIMIX_communication_wait_for_completion(smx_comm_t comm, double timeout) -{ - smx_action_t act_sleep = NULL; - int src_timeout = 0; - int dst_timeout = 0; - - DEBUG1("Waiting for the completion of communication %p", comm); - - if (timeout >= 0) { - act_sleep = SIMIX_action_sleep(SIMIX_host_self(), timeout); - if(SIMIX_process_self()==comm->src_proc) - comm->src_timeout = act_sleep; - else - comm->dst_timeout = act_sleep; - SIMIX_action_set_name(act_sleep,bprintf("Timeout for comm %p and wait on semaphore %p (max_duration:%f)", comm, comm->sem,timeout)); - SIMIX_register_action_to_semaphore(act_sleep, comm->sem); - SIMIX_process_self()->waiting_action = act_sleep; - SIMIX_sem_block_onto(comm->sem); - SIMIX_process_self()->waiting_action = NULL; - SIMIX_unregister_action_to_semaphore(act_sleep, comm->sem); - } else { - SIMIX_sem_acquire(comm->sem); + req->issuer->waiting_action = NULL; + SIMIX_request_answer(req); } +} - /* Check for timeouts */ - if ((src_timeout = ((comm->src_timeout) && (SIMIX_action_get_state(comm->src_timeout) == SURF_ACTION_DONE))) || - (dst_timeout = ((comm->dst_timeout) && (SIMIX_action_get_state(comm->dst_timeout) == SURF_ACTION_DONE))) ) { - /* Somebody did a timeout! */ - if (src_timeout) DEBUG1("Communication timeout from the src! %p", comm); - if (dst_timeout) DEBUG1("Communication timeout from the dst! %p", comm); - - if(comm->act && SIMIX_action_get_state(comm->act) == SURF_ACTION_RUNNING) - SIMIX_communication_cancel(comm); - else if (comm->rdv) - SIMIX_rdv_remove(comm->rdv, comm); - - /* Make sure that everyone sleeping on that semaphore is awake, and that nobody will ever block on it */ - SIMIX_sem_release_forever(comm->sem); - SIMIX_communication_destroy(comm); - - THROW1(timeout_error, 0, "Communication timeouted because of %s",src_timeout?"the source":"the destination"); +void SIMIX_post_comm(smx_action_t action) +{ + /* Update action state */ + if (action->comm.src_timeout && + surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_DONE) + action->state = SIMIX_SRC_TIMEOUT; + else if (action->comm.dst_timeout && + surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_DONE) + action->state = SIMIX_DST_TIMEOUT; + else if (action->comm.src_timeout && + surf_workstation_model->action_state_get(action->comm.src_timeout) == SURF_ACTION_FAILED) + action->state = SIMIX_SRC_HOST_FAILURE; + else if (action->comm.dst_timeout && + surf_workstation_model->action_state_get(action->comm.dst_timeout) == SURF_ACTION_FAILED) + action->state = SIMIX_DST_HOST_FAILURE; + else if (action->comm.surf_comm && + surf_workstation_model->action_state_get(action->comm.surf_comm) == SURF_ACTION_FAILED) + action->state = SIMIX_LINK_FAILURE; + else + action->state = SIMIX_DONE; + + DEBUG1("SIMIX_post_comm: action state = %d", action->state); + + /* After this point the surf actions associated with the simix communicate + action are no longer needed, thus we delete them. */ + SIMIX_comm_destroy_internal_actions(action); + + /* If there are requests associated with the action, then answer them */ + if (xbt_fifo_size(action->request_list)) + SIMIX_comm_finish(action); +} + +void SIMIX_comm_cancel(smx_action_t action) +{ + /* If the action is a waiting state means that it is still in a rdv */ + /* so remove from it and delete it */ + if (action->state == SIMIX_WAITING) { + SIMIX_rdv_remove(action->comm.rdv, action); + action->state = SIMIX_FAILED; + } else { + /* When running the MC there are no surf actions */ + if(!MC_IS_ENABLED) + surf_workstation_model->action_cancel(action->comm.surf_comm); } +} - DEBUG1("Communication %p complete!", comm); - SIMIX_communication_cleanup(comm); +void SIMIX_comm_suspend(smx_action_t action) +{ + /*FIXME: shall we suspend also the timeout actions? */ + surf_workstation_model->suspend(action->comm.surf_comm); } -/** - * \brief Cancels a communication - * \brief comm The communication to cancel - */ -XBT_INLINE void SIMIX_communication_cancel(smx_comm_t comm) +void SIMIX_comm_resume(smx_action_t action) { - if (comm->act) - SIMIX_action_cancel(comm->act); + /*FIXME: check what happen with the timeouts */ + surf_workstation_model->resume(action->comm.surf_comm); } + +/************* Action Getters **************/ + /** * \brief get the amount remaining from the communication - * \param comm The communication + * \param action The communication */ -XBT_INLINE double SIMIX_communication_get_remains(smx_comm_t comm) +double SIMIX_comm_get_remains(smx_action_t action) { - DEBUG1("calling SIMIX_action_get_remains(%p)", comm->act); - return SIMIX_action_get_remains(comm->act); -} - -#ifdef HAVE_LATENCY_BOUND_TRACKING -/** - * \brief verify if communication is latency bounded - * \param comm The communication - */ -XBT_INLINE int SIMIX_communication_is_latency_bounded(smx_comm_t comm) -{ - //try to find comm on the list of finished flows - uintptr_t key = 0; - uintptr_t data = 0; - xbt_dict_cursor_t cursor; - xbt_dict_foreach(latency_limited_dict,cursor,key,data) { - DEBUG2("comparing key=%p with comm=%p", (void*)key, (void*)comm); - if((void*)comm == (void*)key){ - DEBUG2("key %p found, return value latency limited value %d", (void*)key, (int)data); - return (int)data; - } - } + double remains; - DEBUG1("calling SIMIX_action_is_latency_bounded(%p)", comm->act); - return SIMIX_action_is_latency_bounded(comm->act); -} -#endif + switch (action->state) { -/******************************************************************************/ -/* SIMIX_network_copy_data callbacks */ -/******************************************************************************/ -static void (*SIMIX_network_copy_data_callback)(smx_comm_t, size_t) = &SIMIX_network_copy_pointer_callback; + case SIMIX_RUNNING: + remains = surf_workstation_model->get_remains(action->comm.surf_comm); + break; -void SIMIX_network_set_copy_data_callback(void (*callback)(smx_comm_t, size_t)) { - SIMIX_network_copy_data_callback = callback; -} + case SIMIX_WAITING: + case SIMIX_READY: + remains = 0; /*FIXME: check what should be returned */ + break; -void SIMIX_network_copy_pointer_callback(smx_comm_t comm, size_t buff_size) { - xbt_assert1((buff_size == sizeof(void*)), "Cannot copy %zu bytes: must be sizeof(void*)",buff_size); - *(void**)(comm->dst_buff) = comm->src_buff; + default: + remains = 0; /*FIXME: is this correct? */ + break; + } + return remains; } -void SIMIX_network_copy_buffer_callback(smx_comm_t comm, size_t buff_size) { - memcpy(comm->dst_buff, comm->src_buff, buff_size); +e_smx_state_t SIMIX_comm_get_state(smx_action_t action) +{ + return action->state; } /** - * \brief Copy the communication data from the sender's buffer to the receiver's one - * \param comm The communication + * \brief Return the user data associated to the sender of the communication + * \param action The communication + * \return the user data */ -void SIMIX_network_copy_data(smx_comm_t comm) +void* SIMIX_comm_get_src_data(smx_action_t action) { - size_t buff_size = comm->src_buff_size; - uintptr_t casted_size = 0; - uintptr_t amount = 0; - /* If there is no data to be copy then return */ - if(!comm->src_buff || !comm->dst_buff || comm->copied == 1) - return; - - DEBUG6("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)", - comm, - comm->src_proc->smx_host->name, comm->src_buff, - comm->dst_proc->smx_host->name, comm->dst_buff, - buff_size); - - /* Copy at most dst_buff_size bytes of the message to receiver's buffer */ - if (comm->dst_buff_size) - buff_size = MIN(buff_size,*(comm->dst_buff_size)); - - /* Update the receiver's buffer size to the copied amount */ - if (comm->dst_buff_size) - *comm->dst_buff_size = buff_size; - - if(buff_size == 0) - return; - (*SIMIX_network_copy_data_callback)(comm, buff_size); - - /* Set the copied flag so we copy data only once */ - /* (this function might be called from both communication ends)*/ - comm->copied = 1; - - /* pimple to display the message sizes */ - { - if (msg_sizes == NULL) - msg_sizes = xbt_dict_new(); - casted_size = comm->task_size; - amount = xbt_dicti_get(msg_sizes, casted_size); - amount++; - - xbt_dicti_set(msg_sizes,casted_size, amount); - } -} -#include "xbt.h" -/* pimple to display the message sizes */ -void SIMIX_message_sizes_output(const char *filename) { - uintptr_t key = 0; - uintptr_t data = 0; - xbt_dict_cursor_t cursor; - FILE * out = NULL; - out = fopen(filename,"w"); - xbt_assert1(out,"Cannot open file %s",filename); - - xbt_dict_foreach(msg_sizes,cursor,key,data) { - fprintf(out,"%zu %zu\n",key,data); - } - fclose(out); + return action->comm.src_data; } /** - * \brief Return the user data associated to the communication - * \param comm The communication + * \brief Return the user data associated to the receiver of the communication + * \param action The communication * \return the user data */ -XBT_INLINE void *SIMIX_communication_get_data(smx_comm_t comm) +void* SIMIX_comm_get_dst_data(smx_action_t action) { - return comm->data; + return action->comm.dst_data; } -XBT_PUBLIC(void *) SIMIX_communication_get_src_buf(smx_comm_t comm) +void* SIMIX_comm_get_src_buff(smx_action_t action) { - return comm->src_buff; + return action->comm.src_buff; } -XBT_PUBLIC(void *) SIMIX_communication_get_dst_buf(smx_comm_t comm) + +void* SIMIX_comm_get_dst_buff(smx_action_t action) { - return comm->dst_buff; + return action->comm.dst_buff; } -XBT_PUBLIC(size_t) SIMIX_communication_get_src_buf_size(smx_comm_t comm) + +size_t SIMIX_comm_get_src_buff_size(smx_action_t action) { - return comm->src_buff_size; + return action->comm.src_buff_size; } -XBT_PUBLIC(size_t) SIMIX_communication_get_dst_buf_size(smx_comm_t comm) + +size_t SIMIX_comm_get_dst_buff_size(smx_action_t action) { - return *(comm->dst_buff_size); + size_t buff_size; + + if (action->comm.dst_buff_size) + buff_size = *(action->comm.dst_buff_size); + else + buff_size = 0; + + return buff_size; } -/******************************************************************************/ -/* Synchronous Communication */ -/******************************************************************************/ -/** - * \brief Put a send communication request in a rendez-vous point and waits for - * its completion (blocking) - * \param rdv The rendez-vous point - * \param task_size The size of the communication action (for surf simulation) - * \param rate The rate of the communication action (for surf) - * \param timeout The timeout used for the waiting the completion - * \param src_buff The source buffer containing the message to be sent - * \param src_buff_size The size of the source buffer - * \param comm_ref The communication object used for the send (useful if someone else wants to cancel this communication afterward) - * \param data User data associated to the communication object - * Throws: - * - host_error if peer failed - * - timeout_error if communication reached the timeout specified - * - network_error if network failed or peer issued a timeout - */ -XBT_INLINE void SIMIX_network_send(smx_rdv_t rdv, double task_size, double rate, - double timeout, void *src_buff, size_t src_buff_size, - smx_comm_t *comm_ref, void *data) +smx_process_t SIMIX_comm_get_src_proc(smx_action_t action) { - *comm_ref = SIMIX_network_isend(rdv,task_size,rate,src_buff,src_buff_size,data); - SIMIX_network_wait(*comm_ref,timeout); + return action->comm.src_proc; } -/** - * \brief Put a receive communication request in a rendez-vous point and waits - * for its completion (blocking) - * \param rdv The rendez-vous point - * \param timeout The timeout used for the waiting the completion - * \param dst_buff The destination buffer to copy the received message - * \param src_buff_size The size of the destination buffer - * \param comm_ref The communication object used for the send (useful if someone else wants to cancel this communication afterward) - * Throws: - * - host_error if peer failed - * - timeout_error if communication reached the timeout specified - * - network_error if network failed or peer issued a timeout - */ -XBT_INLINE void SIMIX_network_recv(smx_rdv_t rdv, double timeout, void *dst_buff, - size_t *dst_buff_size, smx_comm_t *comm_ref) +smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action) { - *comm_ref = (smx_comm_t) SIMIX_network_irecv(rdv,dst_buff,dst_buff_size); - SIMIX_network_wait(*comm_ref,timeout); + return action->comm.dst_proc; } -/******************************************************************************/ -/* Asynchronous Communication */ -/******************************************************************************/ -smx_comm_t SIMIX_network_isend(smx_rdv_t rdv, double task_size, double rate, - void *src_buff, size_t src_buff_size, void *data) +#ifdef HAVE_LATENCY_BOUND_TRACKING +/** + * \brief verify if communication is latency bounded + * \param comm The communication + */ +XBT_INLINE int SIMIX_comm_is_latency_bounded(smx_action_t action) { - smx_comm_t comm; - - /*If running in model-checking mode then intercept the communication action*/ - #ifdef HAVE_MC - if (_surf_do_model_check) - MC_trans_intercept_isend(rdv); - #endif - /* Look for communication request matching our needs. - If it is not found then create it and push it into the rendez-vous point */ - comm = SIMIX_rdv_get_request(rdv, comm_recv); - - if(!comm){ - comm = SIMIX_communication_new(comm_send); - SIMIX_rdv_push(rdv, comm); + if (action->comm.surf_comm){ + DEBUG1("Getting latency limited for surf_action (%p)", action->comm.surf_comm); + action->latency_limited = surf_workstation_model->get_latency_limited(action->comm.surf_comm); + DEBUG1("Action limited is %d", action->latency_limited); } - - /* Setup the communication request */ - comm->src_proc = SIMIX_process_self(); - comm->task_size = task_size; - comm->rate = rate; - comm->src_buff = src_buff; - comm->src_buff_size = src_buff_size; - comm->data = data; - - SIMIX_communication_start(comm); - return comm; + return action->latency_limited; } - -smx_comm_t SIMIX_network_irecv(smx_rdv_t rdv, void *dst_buff, size_t *dst_buff_size) -{ - smx_comm_t comm; - - /*If running in model-checking mode then intercept the communication action*/ -#ifdef HAVE_MC - if (_surf_do_model_check) - MC_trans_intercept_irecv(rdv); #endif - /* Look for communication request matching our needs. - * If it is not found then create it and push it into the rendez-vous point - */ - comm = SIMIX_rdv_get_request(rdv, comm_send); - if(!comm){ - comm = SIMIX_communication_new(comm_recv); - SIMIX_rdv_push(rdv, comm); - } +/******************************************************************************/ +/* SIMIX_comm_copy_data callbacks */ +/******************************************************************************/ +static void (*SIMIX_comm_copy_data_callback) (smx_action_t, size_t) = + &SIMIX_comm_copy_pointer_callback; - /* Setup communication request */ - comm->dst_proc = SIMIX_process_self(); - comm->dst_buff = dst_buff; - comm->dst_buff_size = dst_buff_size; - - SIMIX_communication_start(comm); - return comm; +void +SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t)) +{ + SIMIX_comm_copy_data_callback = callback; } -/** @brief blocks until the communication terminates or the timeout occurs */ -XBT_INLINE void SIMIX_network_wait(smx_comm_t comm, double timeout) +void SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size) { - /*If running in model-checking mode then intercept the communication action*/ -#ifdef HAVE_MC - if (_surf_do_model_check) - MC_trans_intercept_wait(comm); -#endif - /* Wait for communication completion */ - SIMIX_communication_wait_for_completion(comm, timeout); + xbt_assert1((buff_size == sizeof(void *)), + "Cannot copy %zu bytes: must be sizeof(void*)", buff_size); + *(void **) (comm->comm.dst_buff) = comm->comm.src_buff; } -/** @Returns whether the (asynchronous) communication is done yet or not */ -XBT_INLINE int SIMIX_network_test(smx_comm_t comm) +void SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size) { - /*If running in model-checking mode then intercept the communication action*/ -#ifdef HAVE_MC - if (_surf_do_model_check) - MC_trans_intercept_test(comm); -#endif - - /* Copy data if the communication is done */ - if(comm->sem && !SIMIX_sem_would_block(comm->sem)){ - /* Copy network data */ - SIMIX_network_copy_data(comm); - return TRUE; - } - return FALSE; + memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size); } -/** @brief wait for the completion of any communication of a set - * - * @Returns the rank in the dynar of communication which finished; destroy it after identifying which one it is +/** + * \brief Copy the communication data from the sender's buffer to the receiver's one + * \param comm The communication */ -unsigned int SIMIX_network_waitany(xbt_dynar_t comms) +void SIMIX_comm_copy_data(smx_action_t comm) { - xbt_dynar_t sems = xbt_dynar_new(sizeof(smx_sem_t),NULL); - unsigned int cursor, found_comm=-1; - smx_comm_t comm,comm_finished=NULL; + size_t buff_size = comm->comm.src_buff_size; + /* If there is no data to be copy then return */ + if (!comm->comm.src_buff || !comm->comm.dst_buff || comm->comm.copied == 1) + return; - /*If running in model-checking mode then intercept the communication action*/ -#ifdef HAVE_MC - if (_surf_do_model_check) - MC_trans_intercept_waitany(comms); -#endif - xbt_dynar_foreach(comms,cursor,comm) - xbt_dynar_push(sems,&(comm->sem)); + DEBUG6("Copying comm %p data from %s (%p) -> %s (%p) (%zu bytes)", + comm, + comm->comm.src_proc->smx_host->name, comm->comm.src_buff, + comm->comm.dst_proc->smx_host->name, comm->comm.dst_buff, buff_size); + + /* Copy at most dst_buff_size bytes of the message to receiver's buffer */ + if (comm->comm.dst_buff_size) + buff_size = MIN(buff_size, *(comm->comm.dst_buff_size)); - DEBUG1("Waiting for the completion of communication set %p", comms); + /* Update the receiver's buffer size to the copied amount */ + if (comm->comm.dst_buff_size) + *comm->comm.dst_buff_size = buff_size; - found_comm = SIMIX_sem_acquire_any(sems); - xbt_dynar_free_container(&sems); - xbt_assert0(found_comm!=-1,"Cannot find which communication finished"); - xbt_dynar_get_cpy(comms,found_comm,&comm_finished); + if (buff_size == 0) + return; - DEBUG2("Communication %p of communication set %p finished", comm_finished, comms); + (*SIMIX_comm_copy_data_callback) (comm, buff_size); - /* let the regular code deal with the communication end (errors checking and cleanup). - * A bit of useless work will be done, but that's good for source factorization */ - SIMIX_sem_release_forever(comm_finished->sem); - SIMIX_communication_wait_for_completion(comm_finished, -1); - return found_comm; + /* Set the copied flag so we copy data only once */ + /* (this function might be called from both communication ends) */ + comm->comm.copied = 1; }