2 #include "xbt/sysdep.h"
6 XBT_LOG_NEW_CATEGORY(sd,"Logging specific to SimDag");
7 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel,sd,
8 "Logging specific to SimDag (kernel)");
10 SD_global_t sd_global = NULL;
13 * \brief Initialises SD internal data
15 * This function must be called before any other SD function. Then you
16 * should call SD_create_environment().
18 * \param argc argument number
19 * \param argv argument list
20 * \see SD_create_environment(), SD_exit()
22 void SD_init(int *argc, char **argv) {
23 if (SD_INITIALISED()) {
24 xbt_assert0(0, "SD_init() already called");
27 sd_global = xbt_new0(s_SD_global_t, 1);
28 sd_global->workstations = xbt_dict_new();
29 sd_global->workstation_count = 0;
30 sd_global->workstation_list = NULL;
31 sd_global->links = xbt_dict_new();
32 sd_global->link_count = 0;
33 sd_global->link_list = NULL;
34 sd_global->watch_point_reached = 0;
37 sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
38 sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
39 sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
40 sd_global->in_fifo_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
41 sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
42 sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
43 sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
45 surf_init(argc, argv);
49 * \brief Creates the environment
51 * The environment (i.e. the \ref SD_workstation_management "workstations" and the
52 * \ref SD_link_management "links") is created with the data stored in the given XML
55 * \param platform_file name of an XML file describing the environment to create
56 * \see SD_workstation_management, SD_link_management
58 * The XML file follows this DTD:
60 * \include surfxml.dtd
62 * Here is a small example of such a platform:
64 * \include small_platform.xml
66 void SD_create_environment(const char *platform_file) {
67 xbt_dict_cursor_t cursor = NULL;
69 void *surf_workstation = NULL;
70 void *surf_link = NULL;
74 DEBUG0("SD_create_environment");
76 surf_timer_resource_init(platform_file); /* tell Surf to create the environnement */
78 DEBUG0("Calling surf_workstation_resource_init");
79 surf_workstation_resource_init_KCCFLN05(platform_file);
80 /* surf_workstation_resource_init_CLM03(platform_file); */
82 /* now let's create the SD wrappers for workstations and links */
83 DEBUG0("Creating SimDags hosts and links");
84 xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
85 __SD_workstation_create(surf_workstation, NULL);
88 xbt_dict_foreach(network_link_set, cursor, name, surf_link) {
89 __SD_link_create(surf_link, NULL);
94 * \brief Launches the simulation.
96 * The function will execute the \ref SD_READY ready tasks.
97 * The simulation will be stopped when its time reaches \a how_long,
98 * when a watch point is reached, or when no more task can be executed.
99 * Then you can call SD_simulate() again.
101 * \param how_long maximum duration of the simulation (a negative value means no time limit)
102 * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
103 * \see SD_task_schedule(), SD_task_watch()
105 SD_task_t* SD_simulate(double how_long)
107 double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
108 double elapsed_time = 0.0;
110 SD_dependency_t dependency;
111 surf_action_t action;
112 SD_task_t *changed_tasks = NULL;
113 int changed_task_number = 0;
114 int changed_task_capacity = 16; /* will be increased if necessary */
116 static int first_time = 1;
118 SD_CHECK_INIT_DONE();
120 INFO0("Starting simulation...");
122 /* create the array that will be returned */
123 changed_tasks = xbt_new0(SD_task_t, changed_task_capacity);
124 changed_tasks[0] = NULL;
127 surf_solve(); /* Takes traces into account. Returns 0.0 */
131 sd_global->watch_point_reached = 0;
133 /* explore the ready tasks */
134 xbt_swag_foreach(task, sd_global->ready_task_set) {
135 INFO1("Executing task '%s'", SD_task_get_name(task));
136 if ((task->state_changed = __SD_task_try_to_run(task))) {
137 changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
138 if (changed_task_number == changed_task_capacity) {
139 changed_task_capacity *= 2;
140 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
142 changed_tasks[changed_task_number] = NULL;
148 while (elapsed_time >= 0.0 &&
149 (how_long < 0.0 || total_time < how_long) &&
150 !sd_global->watch_point_reached) {
152 DEBUG1("Total time: %f", total_time);
154 elapsed_time = surf_solve();
155 DEBUG1("surf_solve() returns %f", elapsed_time);
156 if (elapsed_time > 0.0)
157 total_time += elapsed_time;
159 /* let's see which tasks are done */
160 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
162 INFO1("Task '%s' done", SD_task_get_name(task));
163 DEBUG0("Calling __SD_task_just_done");
164 __SD_task_just_done(task);
165 INFO1("__SD_task_just_done called on task '%s'", SD_task_get_name(task));
167 /* the state has changed */
168 if (!task->state_changed) {
169 task->state_changed = 1;
170 changed_tasks[changed_task_number++] = task;
171 if (changed_task_number == changed_task_capacity) {
172 changed_task_capacity *= 2;
173 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
175 changed_tasks[changed_task_number] = NULL;
178 /* remove the dependencies after this task */
179 while (xbt_dynar_length(task->tasks_after) > 0) {
180 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
181 dst = dependency->dst;
182 SD_task_dependency_remove(task, dst);
184 /* is dst ready now? */
185 if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
186 INFO1("Executing task '%s'", SD_task_get_name(dst));
187 if (__SD_task_try_to_run(dst)) {
188 changed_tasks[changed_task_number++] = dst;
189 if (changed_task_number == changed_task_capacity) {
190 changed_task_capacity *= 2;
191 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
193 changed_tasks[changed_task_number] = NULL;
199 /* let's see which tasks have just failed */
200 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
202 INFO1("Task '%s' failed", SD_task_get_name(task));
203 __SD_task_set_state(task, SD_FAILED);
204 surf_workstation_resource->common_public->action_free(action);
205 task->surf_action = NULL;
207 if (!task->state_changed) {
208 task->state_changed = 1;
209 changed_tasks[changed_task_number++] = task;
210 if (changed_task_number == changed_task_capacity) {
211 changed_task_capacity *= 2;
212 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
214 changed_tasks[changed_task_number] = NULL;
219 /* we must reset every task->state_changed */
221 while (changed_tasks[i] != NULL) {
222 changed_tasks[i]->state_changed = 0;
226 INFO0("Simulation finished");
227 DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d", elapsed_time, total_time, sd_global->watch_point_reached);
228 DEBUG1("current time = %f", surf_get_clock());
230 return changed_tasks;
234 * \brief Returns the current clock
236 * \return the current clock, in second
238 double SD_get_clock(void) {
239 SD_CHECK_INIT_DONE();
241 return surf_get_clock();
245 * \brief Destroys all SD internal data
247 * This function should be called when the simulation is over. Don't forget also to destroy
250 * \see SD_init(), SD_task_destroy()
253 if (SD_INITIALISED()) {
254 DEBUG0("Destroying workstation and link dictionaries...");
255 xbt_dict_free(&sd_global->workstations);
256 xbt_dict_free(&sd_global->links);
258 DEBUG0("Destroying workstation and link arrays if necessary...");
259 if (sd_global->workstation_list != NULL)
260 xbt_free(sd_global->workstation_list);
262 if (sd_global->link_list != NULL)
263 xbt_free(sd_global->link_list);
265 DEBUG0("Destroying the swags...");
266 xbt_swag_free(sd_global->not_scheduled_task_set);
267 xbt_swag_free(sd_global->scheduled_task_set);
268 xbt_swag_free(sd_global->ready_task_set);
269 xbt_swag_free(sd_global->in_fifo_task_set);
270 xbt_swag_free(sd_global->running_task_set);
271 xbt_swag_free(sd_global->done_task_set);
272 xbt_swag_free(sd_global->failed_task_set);
277 DEBUG0("Exiting Surf...");
281 fprintf(stderr, "Warning: SD_exit() called while SimDag was not running\n");
282 /* we cannot use exceptions here because xbt is not running! */