-xbt_dynar_t SD_simulate(double how_long) {
- /* we stop the simulation when total_time >= how_long */
- double total_time = 0.0;
- double elapsed_time = 0.0;
- SD_task_t task, dst;
- SD_dependency_t dependency;
- surf_action_t action;
- unsigned int iter, depcnt;
-
- XBT_VERB("Run simulation for %f seconds", how_long);
- sd_global->watch_point_reached = 0;
-
- xbt_dynar_reset(sd_global->return_set);
-
- /* explore the runnable tasks */
- xbt_dynar_foreach(sd_global->executable_task_set , iter, task) {
- XBT_VERB("Executing task '%s'", SD_task_get_name(task));
- SD_task_run(task);
- xbt_dynar_push(sd_global->return_set, &task);
- iter--;
- }
-
- /* main loop */
- elapsed_time = 0.0;
- while (elapsed_time >= 0.0 && (how_long < 0.0 || 0.00001 < (how_long -total_time)) &&
- !sd_global->watch_point_reached) {
- surf_model_t model = NULL;
-
- XBT_DEBUG("Total time: %f", total_time);
-
- elapsed_time = surf_solve(how_long > 0 ? surf_get_clock() + how_long - total_time: -1.0);
- XBT_DEBUG("surf_solve() returns %f", elapsed_time);
- if (elapsed_time > 0.0)
- total_time += elapsed_time;
-
- /* let's see which tasks are done */
- xbt_dynar_foreach(all_existing_models, iter, model) {
- while ((action = surf_model_extract_done_action_set(model))) {
- task = (SD_task_t) action->getData();
- task->start_time = task->surf_action->getStartTime();
-
- task->finish_time = surf_get_clock();
- XBT_VERB("Task '%s' done", SD_task_get_name(task));
- SD_task_set_state(task, SD_DONE);
- task->surf_action->unref();
- task->surf_action = NULL;
-
- /* the state has changed. Add it only if it's the first change */
- if (!xbt_dynar_member(sd_global->return_set, &task)) {
- xbt_dynar_push(sd_global->return_set, &task);
- }
-
- /* remove the dependencies after this task */
- xbt_dynar_foreach(task->tasks_after, depcnt, dependency) {
- dst = dependency->dst;
- dst->unsatisfied_dependencies--;
- if (dst->is_not_ready > 0)
- dst->is_not_ready--;
-
- XBT_DEBUG("Released a dependency on %s: %d remain(s). Became schedulable if %d=0",
- SD_task_get_name(dst), dst->unsatisfied_dependencies, dst->is_not_ready);
-
- if (!(dst->unsatisfied_dependencies)) {
- if (SD_task_get_state(dst) == SD_SCHEDULED)
- SD_task_set_state(dst, SD_RUNNABLE);
- else
- SD_task_set_state(dst, SD_SCHEDULABLE);
- }
-
- if (SD_task_get_state(dst) == SD_NOT_SCHEDULED && !(dst->is_not_ready)) {
- SD_task_set_state(dst, SD_SCHEDULABLE);
- }
-
- if (SD_task_get_kind(dst) == SD_TASK_COMM_E2E) {
- SD_dependency_t comm_dep;
- SD_task_t comm_dst;
- xbt_dynar_get_cpy(dst->tasks_after, 0, &comm_dep);
- comm_dst = comm_dep->dst;
- if (SD_task_get_state(comm_dst) == SD_NOT_SCHEDULED && comm_dst->is_not_ready > 0) {
- comm_dst->is_not_ready--;
-
- XBT_DEBUG("%s is a transfer, %s may be ready now if %d=0",
- SD_task_get_name(dst), SD_task_get_name(comm_dst), comm_dst->is_not_ready);
-
- if (!(comm_dst->is_not_ready)) {
- SD_task_set_state(comm_dst, SD_SCHEDULABLE);
- }
- }
- }
-
- /* is dst runnable now? */
- if (SD_task_get_state(dst) == SD_RUNNABLE && !sd_global->watch_point_reached) {
- XBT_VERB("Executing task '%s'", SD_task_get_name(dst));
- SD_task_run(dst);
- xbt_dynar_push(sd_global->return_set, &dst);
- }
- }
- }
-
- /* let's see which tasks have just failed */
- while ((action = surf_model_extract_failed_action_set(model))) {
- task = (SD_task_t) action->getData();
- task->start_time = task->surf_action->getStartTime();
- task->finish_time = surf_get_clock();
- XBT_VERB("Task '%s' failed", SD_task_get_name(task));
- SD_task_set_state(task, SD_FAILED);
- action->unref();
- task->surf_action = NULL;
-
- xbt_dynar_push(sd_global->return_set, &task);
- }
- }
- }
-
- if (!sd_global->watch_point_reached && how_long<0){
- if (!xbt_dynar_is_empty(sd_global->initial_task_set)) {
- XBT_WARN("Simulation is finished but %lu tasks are still not done",
- xbt_dynar_length(sd_global->initial_task_set));
- static const char* state_names[] =
- { "SD_NOT_SCHEDULED", "SD_SCHEDULABLE", "SD_SCHEDULED", "SD_RUNNABLE", "SD_RUNNING", "SD_DONE","SD_FAILED" };
- xbt_dynar_foreach(sd_global->initial_task_set, iter, task){
- XBT_WARN("%s is in %s state", SD_task_get_name(task), state_names[SD_task_get_state(task)]);
- }
- }
- }
-
- XBT_DEBUG("elapsed_time = %f, total_time = %f, watch_point_reached = %d",
- elapsed_time, total_time, sd_global->watch_point_reached);
- XBT_DEBUG("current time = %f", surf_get_clock());
-
- return sd_global->return_set;