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->recyclable_route = NULL;
35 sd_global->watch_point_reached = 0;
38 sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
39 sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
40 sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
41 sd_global->in_fifo_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
42 sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
43 sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
44 sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
46 surf_init(argc, argv);
50 * \brief Creates the environment
52 * The environment (i.e. the \ref SD_workstation_management "workstations" and the
53 * \ref SD_link_management "links") is created with the data stored in the given XML
56 * \param platform_file name of an XML file describing the environment to create
57 * \see SD_workstation_management, SD_link_management
59 * The XML file follows this DTD:
61 * \include surfxml.dtd
63 * Here is a small example of such a platform:
65 * \include small_platform.xml
67 void SD_create_environment(const char *platform_file) {
68 xbt_dict_cursor_t cursor = NULL;
70 void *surf_workstation = NULL;
71 void *surf_link = NULL;
75 DEBUG0("SD_create_environment");
77 surf_timer_resource_init(platform_file); /* tell Surf to create the environnement */
79 DEBUG0("Calling surf_workstation_resource_init");
80 surf_workstation_resource_init_KCCFLN05(platform_file);
81 /* surf_workstation_resource_init_CLM03(platform_file); */
83 /* now let's create the SD wrappers for workstations and links */
84 DEBUG0("Creating SimDags hosts and links");
85 xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
86 __SD_workstation_create(surf_workstation, NULL);
89 xbt_dict_foreach(network_link_set, cursor, name, surf_link) {
90 __SD_link_create(surf_link, NULL);
95 * \brief Launches the simulation.
97 * The function will execute the \ref SD_READY ready tasks.
98 * The simulation will be stopped when its time reaches \a how_long,
99 * when a watch point is reached, or when no more task can be executed.
100 * Then you can call SD_simulate() again.
102 * \param how_long maximum duration of the simulation (a negative value means no time limit)
103 * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
104 * \see SD_task_schedule(), SD_task_watch()
106 SD_task_t* SD_simulate(double how_long)
108 double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
109 double elapsed_time = 0.0;
111 SD_dependency_t dependency;
112 surf_action_t action;
113 SD_task_t *changed_tasks = NULL;
114 int changed_task_number = 0;
115 int changed_task_capacity = 16; /* will be increased if necessary */
117 static int first_time = 1;
119 SD_CHECK_INIT_DONE();
121 INFO0("Starting simulation...");
123 /* create the array that will be returned */
124 changed_tasks = xbt_new0(SD_task_t, changed_task_capacity);
125 changed_tasks[0] = NULL;
128 surf_solve(); /* Takes traces into account. Returns 0.0 */
132 sd_global->watch_point_reached = 0;
134 /* explore the ready tasks */
135 xbt_swag_foreach(task, sd_global->ready_task_set) {
136 INFO1("Executing task '%s'", SD_task_get_name(task));
137 if ((task->state_changed = __SD_task_try_to_run(task))) {
138 changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
139 if (changed_task_number == changed_task_capacity) {
140 changed_task_capacity *= 2;
141 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
143 changed_tasks[changed_task_number] = NULL;
149 while (elapsed_time >= 0.0 &&
150 (how_long < 0.0 || total_time < how_long) &&
151 !sd_global->watch_point_reached) {
153 DEBUG1("Total time: %f", total_time);
155 elapsed_time = surf_solve();
156 DEBUG1("surf_solve() returns %f", elapsed_time);
157 if (elapsed_time > 0.0)
158 total_time += elapsed_time;
160 /* let's see which tasks are done */
161 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
163 INFO1("Task '%s' done", SD_task_get_name(task));
164 DEBUG0("Calling __SD_task_just_done");
165 __SD_task_just_done(task);
166 DEBUG1("__SD_task_just_done called on task '%s'", SD_task_get_name(task));
168 /* the state has changed */
169 if (!task->state_changed) {
170 task->state_changed = 1;
171 changed_tasks[changed_task_number++] = task;
172 if (changed_task_number == changed_task_capacity) {
173 changed_task_capacity *= 2;
174 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
176 changed_tasks[changed_task_number] = NULL;
179 /* remove the dependencies after this task */
180 while (xbt_dynar_length(task->tasks_after) > 0) {
181 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
182 dst = dependency->dst;
183 SD_task_dependency_remove(task, dst);
185 /* is dst ready now? */
186 if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
187 INFO1("Executing task '%s'", SD_task_get_name(dst));
188 if (__SD_task_try_to_run(dst)) {
189 changed_tasks[changed_task_number++] = dst;
190 if (changed_task_number == changed_task_capacity) {
191 changed_task_capacity *= 2;
192 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
194 changed_tasks[changed_task_number] = NULL;
200 /* let's see which tasks have just failed */
201 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
203 INFO1("Task '%s' failed", SD_task_get_name(task));
204 __SD_task_set_state(task, SD_FAILED);
205 surf_workstation_resource->common_public->action_free(action);
206 task->surf_action = NULL;
208 if (!task->state_changed) {
209 task->state_changed = 1;
210 changed_tasks[changed_task_number++] = task;
211 if (changed_task_number == changed_task_capacity) {
212 changed_task_capacity *= 2;
213 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
215 changed_tasks[changed_task_number] = NULL;
220 /* we must reset every task->state_changed */
222 while (changed_tasks[i] != NULL) {
223 changed_tasks[i]->state_changed = 0;
227 INFO0("Simulation finished");
228 DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d", elapsed_time, total_time, sd_global->watch_point_reached);
229 DEBUG1("current time = %f", surf_get_clock());
231 return changed_tasks;
235 * \brief Returns the current clock
237 * \return the current clock, in second
239 double SD_get_clock(void) {
240 SD_CHECK_INIT_DONE();
242 return surf_get_clock();
246 * \brief Destroys all SD internal data
248 * This function should be called when the simulation is over. Don't forget also to destroy
251 * \see SD_init(), SD_task_destroy()
254 if (SD_INITIALISED()) {
255 DEBUG0("Destroying workstation and link dictionaries...");
256 xbt_dict_free(&sd_global->workstations);
257 xbt_dict_free(&sd_global->links);
259 DEBUG0("Destroying workstation and link arrays if necessary...");
260 if (sd_global->workstation_list != NULL)
261 xbt_free(sd_global->workstation_list);
263 if (sd_global->link_list != NULL)
264 xbt_free(sd_global->link_list);
266 if (sd_global->recyclable_route != NULL)
267 xbt_free(sd_global->recyclable_route);
269 DEBUG0("Destroying the swags...");
270 xbt_swag_free(sd_global->not_scheduled_task_set);
271 xbt_swag_free(sd_global->scheduled_task_set);
272 xbt_swag_free(sd_global->ready_task_set);
273 xbt_swag_free(sd_global->in_fifo_task_set);
274 xbt_swag_free(sd_global->running_task_set);
275 xbt_swag_free(sd_global->done_task_set);
276 xbt_swag_free(sd_global->failed_task_set);
281 DEBUG0("Exiting Surf...");
285 fprintf(stderr, "Warning: SD_exit() called while SimDag was not running\n");
286 /* we cannot use exceptions here because xbt is not running! */