-#include "simdag/simdag.h"
#include "private.h"
#include "xbt/sysdep.h"
#include "xbt/dynar.h"
#include "surf/surf.h"
+XBT_LOG_NEW_CATEGORY(sd,"Logging specific to SimDag");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel,sd,
+ "Logging specific to SimDag (kernel)");
+
SD_global_t sd_global = NULL;
-/* Initialises SD internal data. This function should be called before any other SD function.
+/**
+ * \brief Initialises SD internal data
+ *
+ * This function must be called before any other SD function. Then you
+ * should call SD_create_environment().
+ *
+ * \param argc argument number
+ * \param argv argument list
+ * \see SD_create_environment(), SD_exit()
*/
void SD_init(int *argc, char **argv) {
xbt_assert0(sd_global == NULL, "SD_init already called");
sd_global->workstations = xbt_dict_new();
sd_global->workstation_count = 0;
sd_global->links = xbt_dict_new();
- sd_global->tasks = xbt_dynar_new(sizeof(SD_task_t), NULL);
+ sd_global->watch_point_reached = 0;
s_SD_task_t task;
sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
+ sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
surf_init(argc, argv);
}
-/* Creates the environnement described in a xml file of a platform description.
+/**
+ * \brief Creates the environment
+ *
+ * The environment (i.e. the \ref SD_workstation_management "workstations" and the
+ * \ref SD_link_management "links") is created with the data stored in the given XML
+ * platform file.
+ *
+ * \param platform_file name of an XML file describing the environment to create
+ * \see SD_workstation_management, SD_link_management
+ *
+ * The XML file follows this DTD:
+ *
+ * \include surfxml.dtd
+ *
+ * Here is a small example of such a platform:
+ *
+ * \include small_platform.xml
*/
void SD_create_environment(const char *platform_file) {
xbt_dict_cursor_t cursor = NULL;
}
}
-/* Launches the simulation. Returns a NULL-terminated array of SD_task_t whose state has changed.
+/**
+ * \brief Launches the simulation.
+ *
+ * The function will execute the \ref SD_READY ready tasks.
+ * The simulation will be stopped when its time reaches \a how_long,
+ * when a watch point is reached, or when no more task can be executed.
+ * Then you can call SD_simulate() again.
+ *
+ * \param how_long maximum duration of the simulation
+ * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
+ * \see SD_task_schedule(), SD_task_watch()
*/
SD_task_t* SD_simulate(double how_long)
{
- /* TODO */
-
double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
double elapsed_time = 0.0;
- int watch_point_reached = 0;
+ SD_task_t task, dst;
+ SD_dependency_t dependency;
+ surf_action_t action;
+ SD_task_t *changed_tasks = NULL;
+ int changed_task_number = 0;
+ int changed_task_capacity = 16; /* will be increased if necessary */
int i;
- SD_task_t task;
- surf_action_t surf_action;
+ static int first_time = 1;
- surf_solve(); /* Takes traces into account. Returns 0.0 */
+ INFO0("Starting simulation...");
- /* main loop */
- while (elapsed_time >= 0.0 && total_time < how_long && !watch_point_reached) {
- for (i = 0 ; i < xbt_dynar_length(sd_global->tasks); i++) {
- xbt_dynar_get_cpy(sd_global->tasks, i, &task);
- printf("Examining task '%s'...\n", SD_task_get_name(task));
-
- /* if the task is scheduled and the dependencies are satisfied,
- we can execute the task */
- if (SD_task_get_state(task) == SD_SCHEDULED) {
- printf("Task '%s' is scheduled.\n", SD_task_get_name(task));
-
- if (xbt_dynar_length(task->tasks_before) == 0) {
- printf("The dependencies are satisfied. Executing task '%s'\n", SD_task_get_name(task));
- surf_action = __SD_task_run(task);
- }
- else {
- printf("Cannot execute task '%s' because some depencies are not satisfied.\n", SD_task_get_name(task));
- }
- }
- else {
- printf("Task '%s' is not scheduled. Nothing to do.\n", SD_task_get_name(task));
- }
+ /* create the array that will be returned */
+ changed_tasks = xbt_new0(SD_task_t, changed_task_capacity);
+ changed_tasks[0] = NULL;
+
+ if (first_time) {
+ surf_solve(); /* Takes traces into account. Returns 0.0 */
+ first_time = 0;
+ }
+
+ sd_global->watch_point_reached = 0;
+
+ /* explore the ready tasks */
+ xbt_swag_foreach(task, sd_global->ready_task_set) {
+ INFO1("Executing task '%s'", SD_task_get_name(task));
+ action = __SD_task_run(task);
+ surf_workstation_resource->common_public->action_set_data(action, task);
+ task->state_changed = 1;
+
+ changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
+ if (changed_task_number == changed_task_capacity) {
+ changed_task_capacity *= 2;
+ changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
}
+ changed_tasks[changed_task_number] = NULL;
+ }
+
+ /* main loop */
+ elapsed_time = 0.0;
+ while (elapsed_time >= 0.0 && total_time < how_long && !sd_global->watch_point_reached) {
+
elapsed_time = surf_solve();
if (elapsed_time > 0.0)
total_time += elapsed_time;
- printf("Total time: %f\n", total_time);
- }
- return NULL;
-}
-
-void SD_test() {
- /* temporary test to explore the workstations and the links */
- xbt_dict_cursor_t cursor = NULL;
- char *name = NULL;
- SD_workstation_t workstation = NULL;
- double power, available_power, bandwidth, latency;
- SD_link_t link = NULL;
+ /* let's see which tasks are done */
+ while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
+ task = action->data;
+ INFO1("Task '%s' done", SD_task_get_name(task));
+ __SD_task_set_state(task, SD_DONE);
+
+ /* the state has changed */
+ if (!task->state_changed) {
+ task->state_changed = 1;
+ changed_tasks[changed_task_number++] = task;
+ if (changed_task_number == changed_task_capacity) {
+ changed_task_capacity *= 2;
+ changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
+ }
+ changed_tasks[changed_task_number] = NULL;
+ }
- surf_solve();
+ /* remove the dependencies after this task */
+ while (xbt_dynar_length(task->tasks_after) > 0) {
+ xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
+ dst = dependency->dst;
+ SD_task_dependency_remove(task, dst);
+
+ /* is dst ready now? */
+ if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
+ INFO1("Executing task '%s'", SD_task_get_name(dst));
+ action = __SD_task_run(dst);
+ surf_workstation_resource->common_public->action_set_data(action, dst);
+ dst->state_changed = 1;
+
+ changed_tasks[changed_task_number++] = dst;
+ if (changed_task_number == changed_task_capacity) {
+ changed_task_capacity *= 2;
+ changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
+ }
+ changed_tasks[changed_task_number] = NULL;
+ }
+ }
+ }
- xbt_dict_foreach(sd_global->workstations, cursor, name, workstation) {
- power = SD_workstation_get_power(workstation);
- available_power = SD_workstation_get_available_power(workstation);
- printf("Workstation name: %s, power: %f Mflop/s, available power: %f%%\n", name, power, (available_power*100));
+ /* let's see which tasks have just failed */
+ while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
+ task = action->data;
+ INFO1("Task '%s' failed", SD_task_get_name(task));
+ __SD_task_set_state(task, SD_FAILED);
+ if (!task->state_changed) {
+ task->state_changed = 1;
+ changed_tasks[changed_task_number++] = task;
+ if (changed_task_number == changed_task_capacity) {
+ changed_task_capacity *= 2;
+ changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
+ }
+ changed_tasks[changed_task_number] = NULL;
+ }
+ }
}
- xbt_dict_foreach(sd_global->links, cursor, name, link) {
- bandwidth = SD_link_get_current_bandwidth(link);
- latency = SD_link_get_current_latency(link);
- printf("Link name: %s, bandwidth: %f, latency: %f\n", name, bandwidth, latency);
+ /* we must reset every task->state_changed */
+ i = 0;
+ while (changed_tasks[i] != NULL) {
+ changed_tasks[i]->state_changed = 0;
+ i++;
}
- /* test the route between two workstations */
- SD_workstation_t src, dst;
- xbt_dict_cursor_first(sd_global->workstations, &cursor);
- xbt_dict_cursor_get_or_free(&cursor, &name, (void**) &src);
- xbt_dict_cursor_step(cursor);
- xbt_dict_cursor_get_or_free(&cursor, &name, (void**) &dst);
- xbt_dict_cursor_free(&cursor);
+ INFO0("Simulation finished");
+ /* printf("elapsed_time = %f, total_time = %f, watch_point_reached = %d\n", elapsed_time, total_time, sd_global->watch_point_reached);*/
- SD_link_t *route = SD_workstation_route_get_list(src, dst);
- int route_size = SD_workstation_route_get_size(src, dst);
-
- printf("Route between %s and %s (%d links) : ", SD_workstation_get_name(src), SD_workstation_get_name(dst), route_size);
- int i;
- for (i = 0; i < route_size; i++) {
- printf("%s ", SD_link_get_name(route[i]));
- }
- printf("\n");
+ return changed_tasks;
}
-/* Destroys all SD internal data. This function should be called when the simulation is over.
- * The tasks should have been destroyed first.
+/**
+ * \brief Destroys all SD internal data.
+ *
+ * This function should be called when the simulation is over. Don't forget also to destroy
+ * the tasks.
+ *
+ * \see SD_init(), SD_task_destroy()
*/
-void SD_exit() {
+void SD_exit(void) {
if (sd_global != NULL) {
xbt_dict_free(&sd_global->workstations);
xbt_dict_free(&sd_global->links);
- xbt_dynar_free(&sd_global->tasks);
xbt_free(sd_global);
xbt_swag_free(sd_global->not_scheduled_task_set);
xbt_swag_free(sd_global->scheduled_task_set);
+ xbt_swag_free(sd_global->ready_task_set);
xbt_swag_free(sd_global->running_task_set);
xbt_swag_free(sd_global->done_task_set);
xbt_swag_free(sd_global->failed_task_set);
