-/* $Id$ */
-
-/* Copyright (c) 2009 Cristian Rosa.
- All rights reserved. */
+/* Copyright (c) 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "private.h"
#include "xbt/log.h"
+#include "mc/mc.h"
+#include "xbt/dict.h"
+
+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 rvp = xbt_new0(s_smx_rvpoint_t, 1);
- rvp->name = name ? xbt_strdup(name) : NULL;
- rvp->read = SIMIX_mutex_init();
- rvp->write = SIMIX_mutex_init();
- rvp->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;
+}
+
+void SIMIX_rdv_destroy(smx_rdv_t rdv)
+{
+ 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);
+ xbt_fifo_free(rdv->comm_fifo);
+ 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;
- return rvp;
+ 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));
}
/**
- * \brief Destroy a rendez-vous point
- * \param name The rendez-vous point to destroy
+ * \brief Push a communication request into a rendez-vous point
+ * \param rdv The rendez-vous point
+ * \param comm The communication request
*/
-void SIMIX_rdv_destroy(smx_rdv_t rvp)
+static XBT_INLINE void SIMIX_rdv_push(smx_rdv_t rdv, smx_action_t comm)
{
- if(rvp->name)
- xbt_free(rvp->name);
- SIMIX_mutex_destroy(rvp->read);
- SIMIX_mutex_destroy(rvp->write);
- xbt_fifo_free(rvp->comm_fifo);
- xbt_free(rvp);
+ xbt_fifo_push(rdv->comm_fifo, comm);
+ comm->comm.rdv = rdv;
}
/**
- * \brief Push a communication request into a rendez-vous point
- * The communications request are dequeued by the two functions below
- * \param rvp The rendez-vous point
+ * \brief Remove a communication request from a rendez-vous point
+ * \param rdv The rendez-vous point
* \param comm The communication request
*/
-static inline void SIMIX_rdv_push(smx_rdv_t rvp, smx_comm_t comm)
+static XBT_INLINE void SIMIX_rdv_remove(smx_rdv_t rdv, smx_action_t comm)
{
- xbt_fifo_push(rvp->comm_fifo, comm);
+ xbt_fifo_remove(rdv->comm_fifo, comm);
+ comm->comm.rdv = NULL;
}
/**
- * \brief Checks if there is a communication request queued in a rendez-vous matching our needs
- * \param rvp The rendez-vous with the queue
- * \param look_for_src boolean. True: we are receiver looking for sender; False: other way round
- * \return The communication request if found, or a newly created one otherwise.
+ * \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 action if found, NULL otherwise
*/
-smx_comm_t SIMIX_rdv_get_request(smx_rdv_t rvp, int (filter)(smx_comm_t, void*), void *arg) {
- smx_comm_t 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;
- /* Traverse the rendez-vous queue looking for a comm request matching the
- filter conditions. If found return it and remove it from the list. */
- xbt_fifo_foreach(rvp->comm_fifo, item, comm, smx_comm_t) {
- if(filter(comm, arg)){
- SIMIX_communication_use(comm);
- xbt_fifo_remove_item(rvp->comm_fifo, item);
- return comm;
+ 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);
}
-
- /* no relevant request found. Return NULL */
+ DEBUG0("No matching communication action found");
return NULL;
}
/******************************************************************************/
-/* Communication Requests */
-/******************************************************************************/
+/* Comunication Actions */
+/******************************************************************************/
/**
- * \brief Creates a new communication request
- * \param sender The process starting the communication (by send)
- * \param receiver The process receiving the communication (by recv)
- * \return the communication request
- */
-smx_comm_t SIMIX_communication_new(smx_comm_type_t type, smx_rdv_t rdv)
+ * \brief Creates a new comunicate action
+ * \param type The type of request (comm_send, comm_recv)
+ * \return The new comunicate action
+ */
+smx_action_t SIMIX_comm_new(e_smx_comm_type_t type)
{
+ smx_action_t act;
+
/* alloc structures */
- smx_comm_t comm = xbt_new0(s_smx_comm_t, 1);
- comm->type = type;
- comm->cond = SIMIX_cond_init();
- comm->rdv = rdv;
- comm->refcount = 1;
-
- return comm;
+ act = xbt_new0(s_smx_action_t, 1);
+ act->type = SIMIX_ACTION_COMMUNICATE;
+ act->state = SIMIX_WAITING;
+ act->request_list = xbt_fifo_new();
+
+ /* 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 Destroy a communication request
- * \param comm The request to be destroyed
+ * \brief Destroy a communicate action
+ * \param action The communicate action to be destroyed
*/
-void SIMIX_communication_destroy(smx_comm_t comm)
+void SIMIX_comm_destroy(smx_action_t action)
+{
+ DEBUG2("Destroy action %p (refcount:%d)", action, action->comm.refcount);
+
+ 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);
+}
+
+void SIMIX_comm_destroy_internal_actions(smx_action_t action)
{
- comm->refcount--;
- if(comm->refcount == 0){
- if(comm->act != NULL)
- SIMIX_action_destroy(comm->act);
+ 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;
+ }
+
+ if (action->comm.src_timeout){
+ action->comm.src_timeout->model_type->action_unref(action->comm.src_timeout);
+ action->comm.src_timeout = NULL;
+ }
- xbt_free(comm->cond);
- xbt_free(comm);
+ if (action->comm.dst_timeout){
+ action->comm.dst_timeout->model_type->action_unref(action->comm.dst_timeout);
+ action->comm.dst_timeout = NULL;
}
}
-/**
- * \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 inline void SIMIX_communication_use(smx_comm_t comm)
+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)
{
- comm->refcount++;
+ 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 Start the simulation of a communication request
- * \param comm The communication request
- */
-static inline void SIMIX_communication_start(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)
{
- /* If both the sender and the receiver are already there, start the communication */
- if(comm->src_host != NULL && comm->dst_host != NULL){
- comm->act = SIMIX_action_communicate(comm->src_host, comm->dst_host, NULL,
- comm->task_size, comm->rate);
- /* Add the communication as user data into the action, so it can be reached from it later */
- comm->act->data = comm;
-
- SIMIX_register_action_to_condition(comm->act, comm->cond);
+ 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_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;
+ }
+
+ /* 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;
}
+
+ SIMIX_comm_start(action);
+ return action;
}
-/**
- * \brief Waits for communication completion and performs error checking
- * \param comm The communication
- * \param timeout The max amount of time to wait for the communication to finish
- *
- * Throws:
- * - host_error if peer failed
- * - timeout_error if communication reached the timeout specified
- * - network_error if network failed or peer issued a timeout
- */
-static inline void SIMIX_communication_wait_for_completion(smx_comm_t comm, double timeout)
+void SIMIX_pre_comm_wait(smx_req_t req, int idx)
{
- xbt_ex_t e;
-
- if(timeout > 0){
- TRY{
- SIMIX_cond_wait_timeout(comm->cond, NULL, timeout);
+ 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;
}
- CATCH(e){
- /* If it's a timeout then cancel the communication and signal the other peer */
- if(e.category == timeout_error)
- SIMIX_action_cancel(comm->act);
- SIMIX_cond_signal(comm->cond);
- RETHROW;
+
+ SIMIX_comm_finish(action);
+ return;
+ }
+
+ /* 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;
+ }
+}
+
+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);
}
- }else{
- SIMIX_cond_wait(comm->cond, NULL);
+ return;
}
- SIMIX_unregister_action_to_condition(comm->act, comm->cond);
-
- /* Check for errors */
- if (SIMIX_host_get_state(comm->dst_host) == 0){
- THROW1(host_error, 0, "Destination host %s failed", comm->dst_host->name);
- } else if (SIMIX_host_get_state(comm->src_host) == 0){
- THROW1(host_error, 0, "Source host %s failed", comm->src_host->name);
- } else if (SIMIX_action_get_state(comm->act) == SURF_ACTION_FAILED){
- THROW0(network_error, 0, "Link failure");
+ 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);
}
}
-/**
- * \brief Copy the communication data from the sender's buffer to the receiver's one
- * \param comm The communication
- */
-void SIMIX_network_copy_data(smx_comm_t comm)
+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)
{
- /* Copy the minimum between the size of the sender's message and the size of the
- receiver's buffer */
- *comm->dest_buff_size = *comm->dest_buff_size < comm->data_size ?
- *comm->dest_buff_size : comm->data_size;
+ 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;
+ }
- memcpy(comm->dest_buff, comm->data, *comm->dest_buff_size);
+ 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 Checks if a communication is a send request
- * \param comm The communication
- * \return Boolean value
- */
-int SIMIX_communication_isSend(smx_comm_t comm)
+void SIMIX_waitany_req_remove_from_actions(smx_req_t req)
{
- return comm->type == comm_send ? TRUE : FALSE;
+ 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 Checks if a communication is a recv request
- * \param comm The communication
- * \return Boolean value
+ * \brief Start the simulation of a communication request
+ * \param action The communication action
*/
-int SIMIX_communication_isRecv(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 (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(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(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);
+ }
+ }
+}
+
+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);
+ }
+
+ /* 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;
+ }
+
+ /* 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);
+ }
+ }
+
+ req->issuer->waiting_action = NULL;
+ SIMIX_request_answer(req);
+ }
+}
+
+void SIMIX_post_comm(smx_action_t action)
{
- return comm->type == comm_recv ? TRUE : FALSE;
+ /* 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);
}
-/* FIXME: move to some other place */
-int comm_filter_get(smx_comm_t comm, void *arg)
+void SIMIX_comm_cancel(smx_action_t action)
{
- if(comm->type == comm_send){
- if(arg && comm->src_host != (smx_host_t)arg)
- return FALSE;
- else
- return TRUE;
- }else{
- return FALSE;
+ /* 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);
}
}
-int comm_filter_put(smx_comm_t comm, void *arg)
+void SIMIX_comm_suspend(smx_action_t action)
{
- return comm->type == comm_recv ? TRUE : FALSE;
+ /*FIXME: shall we suspend also the timeout actions? */
+ surf_workstation_model->suspend(action->comm.surf_comm);
}
-/******************************************************************************/
-/* Synchronous Communication */
-/******************************************************************************/
-/* Throws:
- * - host_error if peer failed
- * - timeout_error if communication reached the timeout specified
- * - network_error if network failed or peer issued a timeout
+
+void SIMIX_comm_resume(smx_action_t action)
+{
+ /*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 action The communication
*/
-void SIMIX_network_send(smx_rdv_t rdv, double task_size, double rate,
- double timeout, void *data, size_t data_size,
- int (filter)(smx_comm_t, void *), void *arg)
+double SIMIX_comm_get_remains(smx_action_t action)
{
- smx_comm_t comm;
+ double remains;
- /* 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, filter, arg);
+ switch (action->state) {
- if(comm == NULL){
- comm = SIMIX_communication_new(comm_send, rdv);
- SIMIX_rdv_push(rdv, comm);
- }
+ case SIMIX_RUNNING:
+ remains = surf_workstation_model->get_remains(action->comm.surf_comm);
+ break;
- /* Setup the communication request */
- comm->src_host = SIMIX_host_self();
- comm->task_size = task_size;
- comm->rate = rate;
- comm->data = data;
- comm->data_size = data_size;
+ case SIMIX_WAITING:
+ case SIMIX_READY:
+ remains = 0; /*FIXME: check what should be returned */
+ break;
- SIMIX_communication_start(comm);
+ default:
+ remains = 0; /*FIXME: is this correct? */
+ break;
+ }
+ return remains;
+}
- /* Wait for communication completion */
- /* FIXME: if the semantic is non blocking, it shouldn't wait on the condition here */
- /* FIXME: add timeout checking stuff */
- SIMIX_communication_wait_for_completion(comm, timeout);
+e_smx_state_t SIMIX_comm_get_state(smx_action_t action)
+{
+ return action->state;
+}
- SIMIX_communication_destroy(comm);
+/**
+ * \brief Return the user data associated to the sender of the communication
+ * \param action The communication
+ * \return the user data
+ */
+void* SIMIX_comm_get_src_data(smx_action_t action)
+{
+ return action->comm.src_data;
}
-/* Throws:
- * - host_error if peer failed
- * - timeout_error if communication reached the timeout specified
- * - network_error if network failed or peer issued a timeout
+/**
+ * \brief Return the user data associated to the receiver of the communication
+ * \param action The communication
+ * \return the user data
*/
-void SIMIX_network_recv(smx_rdv_t rdv, double timeout, void *data,
- size_t *data_size, int (filter)(smx_comm_t, void *), void *arg)
+void* SIMIX_comm_get_dst_data(smx_action_t action)
{
- smx_comm_t comm;
+ return action->comm.dst_data;
+}
- /* 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, filter, arg);
+void* SIMIX_comm_get_src_buff(smx_action_t action)
+{
+ return action->comm.src_buff;
+}
- if(comm == NULL){
- comm = SIMIX_communication_new(comm_send, rdv);
- SIMIX_rdv_push(rdv, comm);
- }
+void* SIMIX_comm_get_dst_buff(smx_action_t action)
+{
+ return action->comm.dst_buff;
+}
- /* Setup communication request */
- comm->dst_host = SIMIX_host_self();
- comm->dest_buff = data;
- comm->dest_buff_size = data_size;
+size_t SIMIX_comm_get_src_buff_size(smx_action_t action)
+{
+ return action->comm.src_buff_size;
+}
- SIMIX_communication_start(comm);
+size_t SIMIX_comm_get_dst_buff_size(smx_action_t action)
+{
+ size_t buff_size;
- /* Wait for communication completion */
- /* FIXME: if the semantic is non blocking, it shouldn't wait on the condition here */
- /* FIXME: add timeout checking stuff */
- SIMIX_communication_wait_for_completion(comm, timeout);
+ if (action->comm.dst_buff_size)
+ buff_size = *(action->comm.dst_buff_size);
+ else
+ buff_size = 0;
- SIMIX_communication_destroy(comm);
+ return buff_size;
}
-/******************************************************************************/
-/* Asynchronous Communication */
-/******************************************************************************/
+smx_process_t SIMIX_comm_get_src_proc(smx_action_t action)
+{
+ return action->comm.src_proc;
+}
-/*
-void SIMIX_network_wait(smx_action_t comm, double timeout)
+smx_process_t SIMIX_comm_get_dst_proc(smx_action_t action)
{
- if (timeout > 0)
- SIMIX_cond_wait_timeout(rvp_cond, rvp_comm_mutex, timeout - start_time);
- else
- SIMIX_cond_wait(rvp_cond, rvp_comm_mutex);
+ return action->comm.dst_proc;
+}
+#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)
+{
+ 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);
+ }
+ return action->latency_limited;
}
+#endif
+
+/******************************************************************************/
+/* SIMIX_comm_copy_data callbacks */
+/******************************************************************************/
+static void (*SIMIX_comm_copy_data_callback) (smx_action_t, size_t) =
+ &SIMIX_comm_copy_pointer_callback;
+void
+SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t))
+{
+ SIMIX_comm_copy_data_callback = callback;
+}
-XBT_PUBLIC(int) SIMIX_network_test(smx_action_t comm)
+void SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size)
{
- if(SIMIX_action_get_state (comm) == SURF_ACTION_DONE){
- memcpy(comm->data
+ 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;
+}
- return SIMIX_action_get_state (comm) == SURF_ACTION_DONE ? TRUE : FALSE;
-}*/
+void SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size)
+{
+ memcpy(comm->comm.dst_buff, comm->comm.src_buff, buff_size);
+}
+/**
+ * \brief Copy the communication data from the sender's buffer to the receiver's one
+ * \param comm The communication
+ */
+void SIMIX_comm_copy_data(smx_action_t comm)
+{
+ 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;
+ 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));
+ /* Update the receiver's buffer size to the copied amount */
+ if (comm->comm.dst_buff_size)
+ *comm->comm.dst_buff_size = buff_size;
+ if (buff_size == 0)
+ return;
+ (*SIMIX_comm_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->comm.copied = 1;
+}
