SD_task_t SD_task_create(const char *name, void *data, double amount) {
SD_CHECK_INIT_DONE();
- SD_task_t task = xbt_new0(s_SD_task_t, 1);
+ SD_task_t task = xbt_new(s_SD_task_t, 1);
/* general information */
task->data = data; /* user data */
task->name = NULL;
task->state_set = sd_global->not_scheduled_task_set;
+ task->state = SD_NOT_SCHEDULED;
xbt_swag_insert(task,task->state_set);
task->amount = amount;
task->communication_amount = NULL;
task->rate = 0;
+ sd_global->task_number++;
+
return task;
}
e_SD_task_state_t SD_task_get_state(SD_task_t task) {
SD_CHECK_INIT_DONE();
xbt_assert0(task != NULL, "Invalid parameter");
-
- if (task->state_set == sd_global->scheduled_task_set)
- return SD_SCHEDULED;
- if (task->state_set == sd_global->done_task_set)
- return SD_DONE;
- if (task->state_set == sd_global->running_task_set)
- return SD_RUNNING;
- if (task->state_set == sd_global->ready_task_set)
- return SD_READY;
- if (task->state_set == sd_global->not_scheduled_task_set)
- return SD_NOT_SCHEDULED;
- return SD_FAILED;
+ return task->state;
}
/* Changes the state of a task. Updates the swags and the flag sd_global->watch_point_reached.
case SD_READY:
task->state_set = sd_global->ready_task_set;
break;
+ case SD_IN_FIFO:
+ task->state_set = sd_global->in_fifo_task_set;
+ break;
case SD_RUNNING:
task->state_set = sd_global->running_task_set;
task->start_time = surf_workstation_resource->common_public->
xbt_assert0(0, "Invalid state");
}
xbt_swag_insert(task, task->state_set);
+ task->state = new_state;
if (task->watch_points & new_state) {
INFO1("Watch point reached with task '%s'!", SD_task_get_name(task));
THROW2(arg_error, 0, "A dependency already exists between task '%s' and task '%s'",
SD_task_get_name(src), SD_task_get_name(dst));
- dependency = xbt_new0(s_SD_dependency_t, 1);
+ dependency = xbt_new(s_SD_dependency_t, 1);
if (name != NULL)
dependency->name = xbt_strdup(name);
task->workstation_nb = workstation_nb;
task->rate = rate;
- task->computation_amount = xbt_new0(double, workstation_nb);
+ task->computation_amount = xbt_new(double, workstation_nb);
memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
int communication_nb = workstation_nb * workstation_nb;
- task->communication_amount = xbt_new0(double, communication_nb);
+ task->communication_amount = xbt_new(double, communication_nb);
memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
- /* we have to create a Surf workstation array instead of the SimDag workstation array */
- task->workstation_list = xbt_new0(void*, workstation_nb);
- int i;
- for (i = 0; i < workstation_nb; i++) {
- task->workstation_list[i] = workstation_list[i]->surf_workstation;
- }
+ task->workstation_list = xbt_new(SD_workstation_t, workstation_nb);
+ memcpy(task->workstation_list, workstation_list, sizeof(SD_workstation_t) * workstation_nb);
/* update the task state */
if (xbt_dynar_length(task->tasks_before) == 0)
*/
static void __SD_task_destroy_scheduling_data(SD_task_t task) {
SD_CHECK_INIT_DONE();
- if (!__SD_task_is_scheduled_or_ready(task))
- THROW1(arg_error, 0, "Task '%s' must be SD_SCHEDULED or SD_READY", SD_task_get_name(task));
+ if (!__SD_task_is_scheduled_or_ready(task) && !__SD_task_is_in_fifo(task))
+ THROW1(arg_error, 0, "Task '%s' must be SD_SCHEDULED, SD_READY or SD_IN_FIFO", SD_task_get_name(task));
- xbt_free(task->workstation_list);
xbt_free(task->computation_amount);
xbt_free(task->communication_amount);
}
-/* Runs a task. This function is called by SD_simulate() when a scheduled task can start
- * (ie when its dependencies are satisfied).
+/* Runs a task. This function is directly called by __SD_task_try_to_run if the task
+ * doesn't have to wait in fifos. Otherwise, it is called by __SD_task_just_done when
+ * the task gets out of its fifos.
*/
-surf_action_t __SD_task_run(SD_task_t task) {
+void __SD_task_really_run(SD_task_t task) {
SD_CHECK_INIT_DONE();
xbt_assert0(task != NULL, "Invalid parameter");
-
- if (!__SD_task_is_ready(task))
- THROW2(arg_error, 0, "Task '%s' is not ready! Task state: %d",
+ xbt_assert2(__SD_task_is_ready_or_in_fifo(task), "Task '%s' is not ready or in a fifo! Task state: %d",
SD_task_get_name(task), SD_task_get_state(task));
+ xbt_assert1(task->workstation_list != NULL, "Task '%s': workstation_list is NULL!", SD_task_get_name(task));
+
+ int i;
+ void **surf_workstations;
+
+ DEBUG1("Really running task '%s'", SD_task_get_name(task));
+
+ /* set this task as current task for the workstations in sequential mode */
+ for (i = 0; i < task->workstation_nb; i++) {
+ if (SD_workstation_get_access_mode(task->workstation_list[i]) == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ task->workstation_list[i]->current_task = task;
+ xbt_assert0(__SD_workstation_is_busy(task->workstation_list[i]), "The workstation should be busy now");
+ }
+ }
+
+ DEBUG1("Task '%s' set as current task for its workstations", SD_task_get_name(task));
+ /* start the task */
+
+ /* we have to create a Surf workstation array instead of the SimDag workstation array */
+ surf_workstations = xbt_new(void*, task->workstation_nb);
+
+ for (i = 0; i < task->workstation_nb; i++) {
+ surf_workstations[i] = task->workstation_list[i]->surf_workstation;
+ }
+
task->surf_action = surf_workstation_resource->extension_public->
execute_parallel_task(task->workstation_nb,
- task->workstation_list,
+ surf_workstations,
task->computation_amount,
task->communication_amount,
task->amount,
task->rate);
+ surf_workstation_resource->common_public->action_set_data(task->surf_action, task);
+ task->state_changed = 1;
DEBUG1("surf_action = %p", task->surf_action);
+ xbt_free(surf_workstations);
__SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
__SD_task_set_state(task, SD_RUNNING);
+ xbt_assert2(__SD_task_is_running(task), "Bad state of task '%s': %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+
+}
+
+/* Tries to run a task. This function is called by SD_simulate() when a scheduled task becomes SD_READY
+ * (ie when its dependencies are satisfied).
+ * If one of the workstations where the task is scheduled on is busy (in sequential mode),
+ * the task doesn't start.
+ * Returns whether the task has started.
+ */
+int __SD_task_try_to_run(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert2(__SD_task_is_ready(task), "Task '%s' is not ready! Task state: %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+
+ int can_start = 1;
+ int i;
+ SD_workstation_t workstation;
+
+ for (i = 0; i < task->workstation_nb; i++) {
+ can_start = !__SD_workstation_is_busy(task->workstation_list[i]);
+ }
+
+ DEBUG2("Task '%s' can start: %d", SD_task_get_name(task), can_start);
+
+ if (!can_start) { /* if the task cannot start and is not in the fifos yet*/
+ for (i = 0; i < task->workstation_nb; i++) {
+ workstation = task->workstation_list[i];
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ DEBUG2("Pushing task '%s' in the fifo of workstation '%s'", SD_task_get_name(task),
+ SD_workstation_get_name(workstation));
+ xbt_fifo_push(workstation->task_fifo, task);
+ }
+ }
+ __SD_task_set_state(task, SD_IN_FIFO);
+ xbt_assert2(__SD_task_is_in_fifo(task), "Bad state of task '%s': %d",
+ SD_task_get_name(task), SD_task_get_state(task));
+ DEBUG1("Task '%s' state is now SD_IN_FIFO", SD_task_get_name(task));
+ }
+ else {
+ __SD_task_really_run(task);
+ }
+
+ return can_start;
+}
+
+/* This function is called by SD_simulate when a task is done.
+ * It updates task->state and task->action and executes if necessary the tasks
+ * which were waiting in fifos for the end of `task'
+ */
+void __SD_task_just_done(SD_task_t task) {
+ SD_CHECK_INIT_DONE();
+ xbt_assert0(task != NULL, "Invalid parameter");
+ xbt_assert1(__SD_task_is_running(task), "The task must be running! Task state: %d", SD_task_get_state(task));
+ xbt_assert1(task->workstation_list != NULL, "Task '%s': workstation_list is NULL!", SD_task_get_name(task));
+
+ int i, j;
+ SD_workstation_t workstation;
+
+ SD_task_t candidate;
+ int candidate_nb = 0;
+ int candidate_capacity = 8;
+ SD_task_t *candidates = xbt_new(SD_task_t, 8);
+ int can_start = 1;
+
+ __SD_task_set_state(task, SD_DONE);
+ surf_workstation_resource->common_public->action_free(task->surf_action);
+ task->surf_action = NULL;
+
+ DEBUG0("Looking for candidates");
+
+ /* if the task was executed on sequential workstations,
+ maybe we can execute the next task of the fifo for each workstation */
+ for (i = 0; i < task->workstation_nb; i++) {
+ workstation = task->workstation_list[i];
+ DEBUG2("Workstation '%s': access_mode = %d", SD_workstation_get_name(workstation), workstation->access_mode);
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ xbt_assert1(workstation->task_fifo != NULL, "Workstation '%s' has sequential access but no fifo!",
+ SD_workstation_get_name(workstation));
+ xbt_assert2(workstation->current_task = task, "Workstation '%s': current task should be '%s'",
+ SD_workstation_get_name(workstation), SD_task_get_name(task));
+
+ /* the task is over so we can release the workstation */
+ workstation->current_task = NULL;
+
+ DEBUG0("Getting candidate in fifo");
+ candidate = xbt_fifo_get_item_content(xbt_fifo_get_first_item(workstation->task_fifo));
+
+ if (candidate != NULL) {
+ DEBUG1("Candidate: '%s'", SD_task_get_name(candidate));
+ xbt_assert2(__SD_task_is_in_fifo(candidate), "Bad state of candidate '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+ }
+
+ DEBUG1("Candidate in fifo: %p", candidate);
+
+ /* if there was a task waiting for my place */
+ if (candidate != NULL) {
+ /* Unfortunately, we are not sure yet that we can execute the task now,
+ because the task can be waiting more deeply in some other workstation's fifos...
+ So we memorize all candidate tasks, and then we will check for each candidate
+ whether or not all its workstations are available. */
+
+ /* realloc if necessary */
+ if (candidate_nb == candidate_capacity) {
+ candidate_capacity *= 2;
+ candidates = xbt_realloc(candidates, sizeof(SD_task_t) * candidate_capacity);
+ }
+
+ /* register the candidate */
+ candidates[candidate_nb++] = candidate;
+ candidate->fifo_checked = 0;
+ }
+ }
+ }
+
+ DEBUG1("Candidates found: %d", candidate_nb);
+
+ /* now we check every candidate task */
+ for (i = 0; i < candidate_nb; i++) {
+ candidate = candidates[i];
+
+ if (candidate->fifo_checked) {
+ continue; /* we have already evaluated that task*/
+ }
- return task->surf_action;
+ xbt_assert2(__SD_task_is_in_fifo(candidate), "Bad state of candidate '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+
+ for (j = 0; j < candidate->workstation_nb && can_start; j++) {
+ workstation = candidate->workstation_list[j];
+
+ /* I can start on this workstation if the workstation is shared
+ or if I am the first task in the fifo */
+ can_start = workstation->access_mode == SD_WORKSTATION_SHARED_ACCESS ||
+ candidate == xbt_fifo_get_item_content(xbt_fifo_get_first_item(workstation->task_fifo));
+ }
+
+ DEBUG2("Candidate '%s' can start: %d", SD_task_get_name(candidate), can_start);
+
+ /* now we are sure that I can start! */
+ if (can_start) {
+ for (j = 0; j < candidate->workstation_nb && can_start; j++) {
+ workstation = candidate->workstation_list[j];
+
+ /* update the fifo */
+ if (workstation->access_mode == SD_WORKSTATION_SEQUENTIAL_ACCESS) {
+ candidate = xbt_fifo_shift(workstation->task_fifo); /* the return value is stored just for debugging */
+ DEBUG1("Head of the fifo: '%s'", (candidate != NULL) ? SD_task_get_name(candidate) : "NULL");
+ xbt_assert0(candidate == candidates[i], "Error in __SD_task_just_done: bad first task in the fifo");
+ }
+ } /* for each workstation */
+
+ /* finally execute the task */
+ DEBUG2("Task '%s' state: %d", SD_task_get_name(candidate), SD_task_get_state(candidate));
+ __SD_task_really_run(candidate);
+
+ DEBUG4("Calling __SD_task_is_running: task '%s', state set: %p, running_task_set: %p, is running: %d",
+ SD_task_get_name(candidate), candidate->state_set, sd_global->running_task_set, __SD_task_is_running(candidate));
+ xbt_assert2(__SD_task_is_running(candidate), "Bad state of task '%s': %d",
+ SD_task_get_name(candidate), SD_task_get_state(candidate));
+ DEBUG0("Okay, the task is running.");
+
+ } /* can start */
+ candidate->fifo_checked = 1;
+ } /* for each candidate */
+
+ xbt_free(candidates);
}
+
/* Remove all dependencies associated with a task. This function is called when the task is destroyed.
*/
static void __SD_task_remove_dependencies(SD_task_t task) {
if (task->surf_action != NULL)
surf_workstation_resource->common_public->action_free(task->surf_action);
+ if (task->workstation_list != NULL)
+ xbt_free(task->workstation_list);
+
xbt_dynar_free(&task->tasks_before);
xbt_dynar_free(&task->tasks_after);
xbt_free(task);
+ sd_global->task_number--;
+
DEBUG0("Task destroyed.");
}
