2 #include "simdag/simdag.h"
3 #include "xbt/sysdep.h"
6 static void __SD_task_remove_dependencies(SD_task_t task);
9 * \brief Creates a new task.
11 * \param name the name of the task (can be \c NULL)
12 * \param data the user data you want to associate with the task (can be \c NULL)
13 * \return the new task
14 * \see SD_task_destroy()
16 SD_task_t SD_task_create(const char *name, void *data, double amount) {
19 SD_task_t task = xbt_new0(s_SD_task_t, 1);
21 /* general information */
22 task->data = data; /* user data */
24 task->name = xbt_strdup(name);
28 task->state_set = sd_global->not_scheduled_task_set;
29 xbt_swag_insert(task,task->state_set);
31 task->amount = amount;
32 task->surf_action = NULL;
33 task->watch_points = 0;
34 task->state_changed = 0;
37 task->tasks_before = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
38 task->tasks_after = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
40 /* scheduling parameters */
41 task->workstation_nb = 0;
42 task->workstation_list = NULL;
43 task->computation_amount = NULL;
44 task->communication_amount = NULL;
51 * \brief Returns the user data of a task
54 * \return the user data associated with this task (can be \c NULL)
55 * \see SD_task_set_data()
57 void* SD_task_get_data(SD_task_t task) {
59 xbt_assert0(task != NULL, "Invalid parameter");
64 * \brief Sets the user data of a task
66 * The new data can be \c NULL. The old data should have been freed first
67 * if it was not \c NULL.
70 * \param data the new data you want to associate with this task
71 * \see SD_task_get_data()
73 void SD_task_set_data(SD_task_t task, void *data) {
75 xbt_assert0(task != NULL, "Invalid parameter");
80 * \brief Returns the state of a task
83 * \return the current \ref e_SD_task_state_t "state" of this task:
84 * #SD_NOT_SCHEDULED, #SD_SCHEDULED, #SD_READY, #SD_RUNNING, #SD_DONE or #SD_FAILED
85 * \see e_SD_task_state_t
87 e_SD_task_state_t SD_task_get_state(SD_task_t task) {
89 xbt_assert0(task != NULL, "Invalid parameter");
91 if (task->state_set == sd_global->scheduled_task_set)
93 if (task->state_set == sd_global->done_task_set)
95 if (task->state_set == sd_global->running_task_set)
97 if (task->state_set == sd_global->ready_task_set)
99 if (task->state_set == sd_global->not_scheduled_task_set)
100 return SD_NOT_SCHEDULED;
104 /* Changes the state of a task. Updates the swags and the flag sd_global->watch_point_reached.
106 void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state) {
107 xbt_swag_remove(task, task->state_set);
109 case SD_NOT_SCHEDULED:
110 task->state_set = sd_global->not_scheduled_task_set;
113 task->state_set = sd_global->scheduled_task_set;
116 task->state_set = sd_global->ready_task_set;
119 task->state_set = sd_global->running_task_set;
122 task->state_set = sd_global->done_task_set;
125 task->state_set = sd_global->failed_task_set;
128 xbt_assert0(0, "Invalid state");
130 xbt_swag_insert(task, task->state_set);
132 if (task->watch_points & new_state) {
133 printf("Watch point reached with task '%s'!\n", SD_task_get_name(task));
134 sd_global->watch_point_reached = 1;
135 SD_task_unwatch(task, new_state); /* remove the watch point */
140 * \brief Returns the name of a task
143 * \return the name of this task (can be \c NULL)
145 const char* SD_task_get_name(SD_task_t task) {
146 SD_CHECK_INIT_DONE();
147 xbt_assert0(task != NULL, "Invalid parameter");
152 * \brief Returns the total amount of a task
155 * \return the total amount of this task
156 * \see SD_task_get_remaining_amount()
158 double SD_task_get_amount(SD_task_t task) {
159 SD_CHECK_INIT_DONE();
160 xbt_assert0(task != NULL, "Invalid parameter");
165 * \brief Returns the remaining amount of a task
168 * \return the remaining amount of this task
169 * \see SD_task_get_amount()
171 double SD_task_get_remaining_amount(SD_task_t task) {
172 SD_CHECK_INIT_DONE();
173 xbt_assert0(task != NULL, "Invalid parameter");
175 if (task->surf_action)
176 return task->surf_action->remains;
181 /* temporary function for debbuging */
182 static void __SD_print_dependencies(SD_task_t task) {
183 printf("The following tasks must be executed before %s:", SD_task_get_name(task));
184 xbt_dynar_t dynar = task->tasks_before;
185 int length = xbt_dynar_length(dynar);
187 SD_dependency_t dependency;
188 for (i = 0; i < length; i++) {
189 xbt_dynar_get_cpy(dynar, i, &dependency);
190 printf(" %s", SD_task_get_name(dependency->src));
193 printf("\nThe following tasks must be executed after %s:", SD_task_get_name(task));
195 dynar = task->tasks_after;
196 length = xbt_dynar_length(dynar);
197 for (i = 0; i < length; i++) {
198 xbt_dynar_get_cpy(dynar, i, &dependency);
199 printf(" %s", SD_task_get_name(dependency->dst));
201 printf("\n----------------------------\n");
204 /* Destroys a dependency between two tasks.
206 static void __SD_task_dependency_destroy(void *dependency) {
207 if (((SD_dependency_t) dependency)->name != NULL)
208 xbt_free(((SD_dependency_t) dependency)->name);
209 xbt_free(dependency);
213 * \brief Adds a dependency between two tasks
215 * \a dst will depend on \a src, ie \a dst will not start before \a src is finished.
216 * Their \ref e_SD_task_state_t "state" must be #SD_NOT_SCHEDULED, #SD_SCHEDULED or #SD_READY.
218 * \param name the name of the new dependency (can be \c NULL)
219 * \param data the user data you want to associate with this dependency (can be \c NULL)
220 * \param src the task which must be executed first
221 * \param dst the task you want to make depend on \a src
222 * \see SD_task_dependency_remove()
224 void SD_task_dependency_add(const char *name, void *data, SD_task_t src, SD_task_t dst) {
225 SD_CHECK_INIT_DONE();
226 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
227 xbt_assert1(src != dst, "Cannot add a dependency between task '%s' and itself", SD_task_get_name(src));
228 xbt_assert1(__SD_task_is_not_scheduled(src) || __SD_task_is_scheduled_or_ready(src),
229 "Task '%s' must be SD_NOT_SCHEDULED, SD_SCHEDULED or SD_READY", SD_task_get_name(src));
230 xbt_assert1(__SD_task_is_not_scheduled(dst) || __SD_task_is_scheduled_or_ready(dst),
231 "Task '%s' must be SD_NOT_SCHEDULED, SD_SCHEDULED or SD_READY", SD_task_get_name(dst));
233 xbt_dynar_t dynar = src->tasks_after;
234 int length = xbt_dynar_length(dynar);
237 SD_dependency_t dependency;
238 for (i = 0; i < length && !found; i++) {
239 xbt_dynar_get_cpy(dynar, i, &dependency);
240 found = (dependency->dst == dst);
242 xbt_assert2(!found, "A dependency already exists between task '%s' and task '%s'",
243 SD_task_get_name(src), SD_task_get_name(dst));
245 dependency = xbt_new0(s_SD_dependency_t, 1);
248 dependency->name = xbt_strdup(name);
249 dependency->data = data;
250 dependency->src = src;
251 dependency->dst = dst;
253 /* src must be executed before dst */
254 xbt_dynar_push(src->tasks_after, &dependency);
255 xbt_dynar_push(dst->tasks_before, &dependency);
257 /* if the task was ready, then dst->tasks_before is not empty anymore,
258 so we must go back to state SD_SCHEDULED */
259 if (__SD_task_is_ready(dst)) {
260 printf("SD_task_dependency_add: %s was ready and becomes scheduled!\n", SD_task_get_name(dst));
261 __SD_task_set_state(dst, SD_SCHEDULED);
264 /* __SD_print_dependencies(src);
265 __SD_print_dependencies(dst); */
269 * \brief Remove a dependency between two tasks
272 * \param dst a task depending on \a src
273 * \see SD_task_dependency_add()
275 void SD_task_dependency_remove(SD_task_t src, SD_task_t dst) {
276 SD_CHECK_INIT_DONE();
277 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
279 /* remove the dependency from src->tasks_after */
280 xbt_dynar_t dynar = src->tasks_after;
281 int length = xbt_dynar_length(dynar);
284 SD_dependency_t dependency;
285 for (i = 0; i < length && !found; i++) {
286 xbt_dynar_get_cpy(dynar, i, &dependency);
287 if (dependency->dst == dst) {
288 xbt_dynar_remove_at(dynar, i, NULL);
292 xbt_assert4(found, "No dependency found between task '%s' and '%s': task '%s' is not a successor of task '%s'",
293 SD_task_get_name(src), SD_task_get_name(dst), SD_task_get_name(dst), SD_task_get_name(src));
295 /* remove the dependency from dst->tasks_before */
296 dynar = dst->tasks_before;
297 length = xbt_dynar_length(dynar);
300 for (i = 0; i < length && !found; i++) {
301 xbt_dynar_get_cpy(dynar, i, &dependency);
302 if (dependency->src == src) {
303 xbt_dynar_remove_at(dynar, i, NULL);
304 __SD_task_dependency_destroy(dependency);
308 xbt_assert4(found, "SimDag error: task '%s' is a successor of '%s' but task '%s' is not a predecessor of task '%s'",
309 SD_task_get_name(dst), SD_task_get_name(src), SD_task_get_name(src), SD_task_get_name(dst)); /* should never happen... */
311 /* if the task was scheduled and dst->tasks_before is empty now, we can make it ready */
312 if (xbt_dynar_length(dst->tasks_before) == 0 && __SD_task_is_scheduled(dst))
313 __SD_task_set_state(dst, SD_READY);
315 /* __SD_print_dependencies(src);
316 __SD_print_dependencies(dst);*/
320 * \brief Returns the user data associated with a dependency between two tasks
323 * \param dst a task depending on \a src
324 * \return the user data associated with this dependency (can be \c NULL)
325 * \see SD_task_dependency_add()
327 void *SD_task_dependency_get_data(SD_task_t src, SD_task_t dst) {
328 SD_CHECK_INIT_DONE();
329 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
331 xbt_dynar_t dynar = src->tasks_after;
332 int length = xbt_dynar_length(dynar);
335 SD_dependency_t dependency;
336 for (i = 0; i < length && !found; i++) {
337 xbt_dynar_get_cpy(dynar, i, &dependency);
338 found = (dependency->dst == dst);
340 xbt_assert2(found, "No dependency found between task '%s' and '%s'", SD_task_get_name(src), SD_task_get_name(dst));
341 return dependency->data;
344 /* temporary function for debugging */
345 static void __SD_print_watch_points(SD_task_t task) {
346 static const int state_masks[] = {SD_SCHEDULED, SD_RUNNING, SD_READY, SD_DONE, SD_FAILED};
347 static const char* state_names[] = {"scheduled", "running", "ready", "done", "failed"};
349 printf("Task '%s' watch points (%x): ", SD_task_get_name(task), task->watch_points);
352 for (i = 0; i < 5; i++) {
353 if (task->watch_points & state_masks[i])
354 printf("%s ", state_names[i]);
360 * \brief Adds a watch point to a task
362 * SD_simulate() will stop as soon as the \ref e_SD_task_state_t "state" of this task becomes the one given in argument. The
363 * watch point is then automatically removed.
366 * \param state the \ref e_SD_task_state_t "state" you want to watch (cannot be #SD_NOT_SCHEDULED)
367 * \see SD_task_unwatch()
369 void SD_task_watch(SD_task_t task, e_SD_task_state_t state) {
370 SD_CHECK_INIT_DONE();
371 xbt_assert0(task != NULL, "Invalid parameter");
372 xbt_assert0(state != SD_NOT_SCHEDULED, "Cannot add a watch point for state SD_NOT_SCHEDULED");
374 task->watch_points = task->watch_points | state;
375 /* __SD_print_watch_points(task);*/
379 * \brief Removes a watch point from a task
382 * \param state the \ref e_SD_task_state_t "state" you no longer want to watch
383 * \see SD_task_watch()
385 void SD_task_unwatch(SD_task_t task, e_SD_task_state_t state) {
386 SD_CHECK_INIT_DONE();
387 xbt_assert0(task != NULL, "Invalid parameter");
388 xbt_assert0(state != SD_NOT_SCHEDULED, "Cannot have a watch point for state SD_NOT_SCHEDULED");
390 task->watch_points = task->watch_points & ~state;
391 /* __SD_print_watch_points(task);*/
394 /* Destroys the data memorised by SD_task_schedule. Task state must be SD_SCHEDULED or SD_READY.
396 static void __SD_task_destroy_scheduling_data(SD_task_t task) {
397 SD_CHECK_INIT_DONE();
398 xbt_assert1(__SD_task_is_scheduled_or_ready(task),
399 "Task '%s' must be SD_SCHEDULED or SD_READY", SD_task_get_name(task));
400 xbt_free(task->workstation_list);
401 xbt_free(task->computation_amount);
402 xbt_free(task->communication_amount);
406 * \brief Schedules a task
408 * The task state must be #SD_NOT_SCHEDULED.
409 * Once scheduled, a task will be executed as soon as possible in SD_simulate(),
410 * i.e. when its dependencies are satisfied.
412 * \param task the task you want to schedule
413 * \param workstation_nb number of workstations on which the task will be executed
414 * \param workstation_list the workstations on which the task will be executed
415 * \param computation_amount computation amount for each workstation
416 * \param communication_amount communication amount between each pair of workstations
417 * \param rate task execution speed rate
418 * \see SD_task_unschedule()
420 void SD_task_schedule(SD_task_t task, int workstation_nb,
421 const SD_workstation_t *workstation_list, const double *computation_amount,
422 const double *communication_amount, double rate) {
423 SD_CHECK_INIT_DONE();
424 xbt_assert0(task, "Invalid parameter");
425 xbt_assert1(__SD_task_is_not_scheduled(task), "Task '%s' has already been scheduled.", SD_task_get_name(task));
426 xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
428 task->workstation_nb = workstation_nb;
431 task->computation_amount = xbt_new0(double, workstation_nb);
432 memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
434 int communication_nb = workstation_nb * workstation_nb;
435 task->communication_amount = xbt_new0(double, communication_nb);
436 memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
438 /* we have to create a Surf workstation array instead of the SimDag workstation array */
439 task->workstation_list = xbt_new0(void*, workstation_nb);
441 for (i = 0; i < workstation_nb; i++) {
442 task->workstation_list[i] = workstation_list[i]->surf_workstation;
445 /* update the task state */
446 if (xbt_dynar_length(task->tasks_before) == 0)
447 __SD_task_set_state(task, SD_READY);
449 __SD_task_set_state(task, SD_SCHEDULED);
453 * \brief Unschedules a task
455 * The task state must be #SD_SCHEDULED, #SD_READY, #SD_RUNNING or #SD_FAILED.
456 * If you call this function, the task state becomes #SD_NOT_SCHEDULED.
457 * Call SD_task_schedule() to schedule it again.
459 * \param task the task you want to unschedule
460 * \see SD_task_schedule()
462 void SD_task_unschedule(SD_task_t task) {
463 SD_CHECK_INIT_DONE();
464 xbt_assert0(task != NULL, "Invalid parameter");
465 xbt_assert1(task->state_set == sd_global->scheduled_task_set ||
466 task->state_set == sd_global->ready_task_set ||
467 task->state_set == sd_global->running_task_set ||
468 task->state_set == sd_global->failed_task_set,
469 "Task %s: the state must be SD_SCHEDULED, SD_READY, SD_RUNNING or SD_FAILED",
470 SD_task_get_name(task));
472 if (__SD_task_is_scheduled_or_ready(task)) /* if the task is scheduled or ready */
473 __SD_task_destroy_scheduling_data(task);
475 if (__SD_task_is_running(task)) /* the task should become SD_FAILED */
476 surf_workstation_resource->common_public->action_cancel(task->surf_action);
478 __SD_task_set_state(task, SD_NOT_SCHEDULED);
481 /* Runs a task. This function is called by SD_simulate when a scheduled task can start
482 * (ie when its dependencies are satisfied).
484 surf_action_t __SD_task_run(SD_task_t task) {
485 SD_CHECK_INIT_DONE();
486 xbt_assert0(task != NULL, "Invalid parameter");
487 xbt_assert2(__SD_task_is_ready(task), "Task '%s' is not ready! Task state: %d",
488 SD_task_get_name(task), SD_task_get_state(task));
490 surf_action_t surf_action = surf_workstation_resource->extension_public->
491 execute_parallel_task(task->workstation_nb,
492 task->workstation_list,
493 task->computation_amount,
494 task->communication_amount,
498 __SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
499 __SD_task_set_state(task, SD_RUNNING);
503 /* Remove all dependencies associated with a task. This function is called when the task is destroyed.
505 static void __SD_task_remove_dependencies(SD_task_t task) {
506 /* we must destroy the dependencies carefuly (with SD_dependency_remove)
507 because each one is stored twice */
508 SD_dependency_t dependency;
509 while (xbt_dynar_length(task->tasks_before) > 0) {
510 xbt_dynar_get_cpy(task->tasks_before, 0, &dependency);
511 SD_task_dependency_remove(dependency->src, dependency->dst);
514 while (xbt_dynar_length(task->tasks_after) > 0) {
515 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
516 SD_task_dependency_remove(dependency->src, dependency->dst);
521 * \brief Destroys a task.
523 * The user data (if any) should have been destroyed first.
525 * \param task the task you want to destroy
526 * \see SD_task_create()
528 void SD_task_destroy(SD_task_t task) {
529 SD_CHECK_INIT_DONE();
530 xbt_assert0(task != NULL, "Invalid parameter");
532 /*printf("Destroying task %s...\n", SD_task_get_name(task));*/
534 __SD_task_remove_dependencies(task);
536 /* if the task was scheduled or ready we have to free the scheduling parameters */
537 if (__SD_task_is_scheduled_or_ready(task))
538 __SD_task_destroy_scheduling_data(task);
540 if (task->name != NULL)
541 xbt_free(task->name);
543 xbt_dynar_free(&task->tasks_before);
544 xbt_dynar_free(&task->tasks_after);
547 /*printf("Task destroyed.\n");*/