2 #include "simdag/simdag.h"
3 #include "xbt/sysdep.h"
8 SD_task_t SD_task_create(const char *name, void *data, double amount) {
10 xbt_assert0(amount > 0, "amount must be positive");
12 SD_task_t task = xbt_new0(s_SD_task_t, 1);
14 /* general information */
15 task->data = data; /* user data */
17 task->name = xbt_strdup(name);
21 task->state_set = sd_global->not_scheduled_task_set;
22 xbt_swag_insert(task,task->state_set);
24 task->amount = amount;
25 task->surf_action = NULL;
26 task->watch_points = 0;
27 task->state_changed = 0;
30 task->tasks_before = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
31 task->tasks_after = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
33 /* scheduling parameters */
34 task->workstation_nb = 0;
35 task->workstation_list = NULL;
36 task->computation_amount = NULL;
37 task->communication_amount = NULL;
43 /* Returns the data of a task.
45 void* SD_task_get_data(SD_task_t task) {
47 xbt_assert0(task != NULL, "Invalid parameter");
51 /* Returns the state of a task: SD_NOT_SCHEDULED, SD_SCHEDULED, SD_RUNNING, SD_DONE or SD_FAILED.
53 e_SD_task_state_t SD_task_get_state(SD_task_t task) {
55 xbt_assert0(task != NULL, "Invalid parameter");
57 if (task->state_set == sd_global->not_scheduled_task_set)
58 return SD_NOT_SCHEDULED;
59 if (task->state_set == sd_global->scheduled_task_set)
61 if (task->state_set == sd_global->running_task_set)
63 if (task->state_set == sd_global->done_task_set)
68 /* Changes the state of a task. Update the swags and the flag sd_global->watch_point_reached.
70 void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state) {
71 xbt_swag_remove(task, task->state_set);
73 case SD_NOT_SCHEDULED:
74 task->state_set = sd_global->not_scheduled_task_set;
77 task->state_set = sd_global->scheduled_task_set;
80 task->state_set = sd_global->running_task_set;
83 task->state_set = sd_global->done_task_set;
85 default: /* SD_FAILED */
86 task->state_set = sd_global->failed_task_set;
88 xbt_swag_insert(task,task->state_set);
90 if (task->watch_points & new_state) {
91 printf("Watch point reached with task '%s' in state %d!\n", SD_task_get_name(task), new_state);
92 sd_global->watch_point_reached = 1;
96 /* Sets the data of a task.
98 void SD_task_set_data(SD_task_t task, void *data) {
100 xbt_assert0(task != NULL, "Invalid parameter");
104 /* Returns the name of a task. The name can be NULL.
106 const char* SD_task_get_name(SD_task_t task) {
107 SD_CHECK_INIT_DONE();
108 xbt_assert0(task != NULL, "Invalid parameter");
112 /* Returns the computing amount of a task.
114 double SD_task_get_amount(SD_task_t task) {
115 SD_CHECK_INIT_DONE();
116 xbt_assert0(task != NULL, "Invalid parameter");
120 /* Returns the remaining computing amount of a task.
122 double SD_task_get_remaining_amount(SD_task_t task) {
123 SD_CHECK_INIT_DONE();
124 xbt_assert0(task != NULL, "Invalid parameter");
126 if (task->surf_action)
129 return task->surf_action->remains;
132 /* temporary function for debbuging
133 void __SD_print_dependencies(SD_task_t task) {
134 printf("The following tasks must be executed before %s:", SD_task_get_name(task));
135 xbt_dynar_t dynar = task->tasks_before;
136 int length = xbt_dynar_length(dynar);
138 SD_dependency_t dependency;
139 for (i = 0; i < length; i++) {
140 xbt_dynar_get_cpy(dynar, i, &dependency);
141 printf(" %s", SD_task_get_name(dependency->src));
144 printf("\nThe following tasks must be executed after %s:", SD_task_get_name(task));
146 dynar = task->tasks_after;
147 length = xbt_dynar_length(dynar);
148 for (i = 0; i < length; i++) {
149 xbt_dynar_get_cpy(dynar, i, &dependency);
150 printf(" %s", SD_task_get_name(dependency->dst));
152 printf("\n----------------------------\n");
155 /* Destroys a dependency between two tasks.
157 static void __SD_task_dependency_destroy(void *dependency) {
158 if (((SD_dependency_t) dependency)->name != NULL)
159 xbt_free(((SD_dependency_t) dependency)->name);
160 xbt_free(dependency);
163 /* Adds a dependency between two tasks.
165 void SD_task_dependency_add(const char *name, void *data, SD_task_t src, SD_task_t dst) {
166 SD_CHECK_INIT_DONE();
167 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
168 xbt_assert1(src != dst, "Cannot add a dependency between task '%s' and itself", SD_task_get_name(src));
170 xbt_dynar_t dynar = src->tasks_after;
171 int length = xbt_dynar_length(dynar);
174 SD_dependency_t dependency;
175 for (i = 0; i < length && !found; i++) {
176 xbt_dynar_get_cpy(dynar, i, &dependency);
177 found = (dependency->dst == dst);
179 xbt_assert2(!found, "A dependency already exists between task '%s' and task '%s'", SD_task_get_name(src), SD_task_get_name(dst));
181 dependency = xbt_new0(s_SD_dependency_t, 1);
184 dependency->name = xbt_strdup(name);
185 dependency->data = data;
186 dependency->src = src;
187 dependency->dst = dst;
189 /* src must be executed before dst */
190 xbt_dynar_push(src->tasks_after, &dependency);
191 xbt_dynar_push(dst->tasks_before, &dependency);
193 /* __SD_print_dependencies(src);
194 __SD_print_dependencies(dst); */
197 /* Removes a dependency between two tasks.
199 void SD_task_dependency_remove(SD_task_t src, SD_task_t dst) {
200 SD_CHECK_INIT_DONE();
201 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
202 xbt_assert1(src != dst, "Cannot remove a dependency between task '%s' and itself", SD_task_get_name(src));
204 xbt_dynar_t dynar = src->tasks_after;
205 int length = xbt_dynar_length(dynar);
208 SD_dependency_t dependency;
209 for (i = 0; i < length && !found; i++) {
210 xbt_dynar_get_cpy(dynar, i, &dependency);
211 if (dependency->dst == dst) {
212 xbt_dynar_remove_at(dynar, i, NULL);
216 xbt_assert4(found, "No dependency found between task '%s' and '%s': task '%s' is not a successor of task '%s'",
217 SD_task_get_name(src), SD_task_get_name(dst), SD_task_get_name(dst), SD_task_get_name(src));
219 dynar = dst->tasks_before;
220 length = xbt_dynar_length(dynar);
223 for (i = 0; i < length && !found; i++) {
224 xbt_dynar_get_cpy(dynar, i, &dependency);
225 if (dependency->src == src) {
226 xbt_dynar_remove_at(dynar, i, NULL);
227 __SD_task_dependency_destroy(dependency);
231 xbt_assert4(found, "SimDag error: task '%s' is a successor of '%s' but task '%s' is not a predecessor of task '%s'",
232 SD_task_get_name(dst), SD_task_get_name(src), SD_task_get_name(src), SD_task_get_name(dst)); /* should never happen... */
234 /* __SD_print_dependencies(src);
235 __SD_print_dependencies(dst); */
238 /* Returns the data associated to a dependency between two tasks. This data can be NULL.
240 void *SD_task_dependency_get_data(SD_task_t src, SD_task_t dst) {
241 SD_CHECK_INIT_DONE();
242 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
243 xbt_assert1(src != dst, "Cannot have a dependency between task '%s' and itself", SD_task_get_name(src));
245 xbt_dynar_t dynar = src->tasks_after;
246 int length = xbt_dynar_length(dynar);
249 SD_dependency_t dependency;
250 for (i = 0; i < length && !found; i++) {
251 xbt_dynar_get_cpy(dynar, i, &dependency);
252 found = (dependency->dst == dst);
254 xbt_assert2(found, "No dependency found between task '%s' and '%s'", SD_task_get_name(src), SD_task_get_name(dst));
255 return dependency->data;
258 /* temporary function for debugging */
259 static void __SD_print_watch_points(SD_task_t task) {
260 static const int state_masks[] = {SD_SCHEDULED, SD_RUNNING, SD_DONE, SD_FAILED};
261 static const char* state_names[] = {"scheduled", "running", "done", "failed"};
263 printf("Task '%s' watch points (%x): ", SD_task_get_name(task), task->watch_points);
266 for (i = 0; i < 4; i++) {
267 if (task->watch_points & state_masks[i])
268 printf("%s ", state_names[i]);
273 /* Adds a watch point to a task.
274 SD_simulate will stop as soon as the state of this task is the one given in argument.
275 Watch point is then automatically removed.
277 void SD_task_watch(SD_task_t task, e_SD_task_state_t state) {
278 SD_CHECK_INIT_DONE();
279 xbt_assert0(task != NULL, "Invalid parameter");
281 task->watch_points = task->watch_points | state;
282 __SD_print_watch_points(task);
285 /* Removes a watch point from a task.
287 void SD_task_unwatch(SD_task_t task, e_SD_task_state_t state) {
288 SD_CHECK_INIT_DONE();
289 xbt_assert0(task != NULL, "Invalid parameter");
291 task->watch_points = task->watch_points & ~state;
292 __SD_print_watch_points(task);
295 /* Destroys the data memorised by SD_task_schedule. Task state must be SD_SCHEDULED.
297 static void __SD_task_destroy_scheduling_data(SD_task_t task) {
298 xbt_free(task->workstation_list);
299 xbt_free(task->computation_amount);
300 xbt_free(task->communication_amount);
304 * task: the task to schedule
305 * workstation_nb: number of workstations where the task will be executed
306 * workstation_list: workstations where the task will be executed
307 * computation_amount: computation amount for each workstation
308 * communication_amount: communication amount between each pair of workstations
309 * rate: task execution speed rate
311 void SD_task_schedule(SD_task_t task, int workstation_nb,
312 const SD_workstation_t *workstation_list, double *computation_amount,
313 double *communication_amount, double rate) {
314 SD_CHECK_INIT_DONE();
315 xbt_assert0(task, "Invalid parameter");
316 xbt_assert1(SD_task_get_state(task) == SD_NOT_SCHEDULED, "Task '%s' has already been scheduled.", SD_task_get_name(task));
317 xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
319 task->workstation_nb = workstation_nb;
322 task->computation_amount = xbt_new0(double, workstation_nb);
323 memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
325 int communication_nb = workstation_nb * workstation_nb;
326 task->communication_amount = xbt_new0(double, communication_nb);
327 memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
329 /* we have to create a Surf workstation array instead of the SimDag workstation array */
330 task->workstation_list = xbt_new0(void*, workstation_nb);
332 for (i = 0; i < workstation_nb; i++) {
333 task->workstation_list[i] = workstation_list[i]->surf_workstation;
336 __SD_task_set_state(task, SD_SCHEDULED);
339 /* Unschedules a task. The state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED.
340 * The task is reinitialised and its state becomes SD_NOT_SCHEDULED.
341 * Call SD_task_schedule to schedule it again.
343 void SD_task_unschedule(SD_task_t task) {
344 SD_CHECK_INIT_DONE();
345 xbt_assert0(task != NULL, "Invalid parameter");
346 e_SD_task_state_t state = SD_task_get_state(task);
347 xbt_assert1(state == SD_SCHEDULED ||
348 state == SD_RUNNING ||
350 "Task %s: the state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED", SD_task_get_name(task));
352 if (state == SD_SCHEDULED)
353 __SD_task_destroy_scheduling_data(task);
355 __SD_task_set_state(task, SD_NOT_SCHEDULED);
358 /* Runs a task. This function is called by SD_simulate when a scheduled task can start
359 * (ie when its dependencies are satisfied).
361 surf_action_t __SD_task_run(SD_task_t task) {
362 SD_CHECK_INIT_DONE();
363 xbt_assert0(task != NULL, "Invalid parameter");
366 surf_action_t surf_action = surf_workstation_resource->extension_public->
367 execute_parallel_task(task->workstation_nb,
368 task->workstation_list,
369 task->computation_amount,
370 task->communication_amount,
373 __SD_task_set_state(task, SD_RUNNING);
375 __SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
379 /* Remove all dependencies associated with a task. This function is called when the task is done.
381 void __SD_task_remove_dependencies(SD_task_t task) {
382 /* we must destroy the dependencies carefuly (with SD_dependency_remove)
383 because each one is stored twice */
384 SD_dependency_t dependency;
385 while (xbt_dynar_length(task->tasks_before) > 0) {
386 xbt_dynar_get_cpy(task->tasks_before, 0, &dependency);
387 SD_task_dependency_remove(dependency->src, dependency->dst);
390 while (xbt_dynar_length(task->tasks_after) > 0) {
391 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
392 SD_task_dependency_remove(dependency->src, dependency->dst);
396 /* Destroys a task. The user data (if any) should have been destroyed first.
398 void SD_task_destroy(SD_task_t task) {
399 SD_CHECK_INIT_DONE();
400 xbt_assert0(task != NULL, "Invalid parameter");
402 /*printf("Destroying task %s...\n", SD_task_get_name(task));*/
404 __SD_task_remove_dependencies(task);
406 /* if the task was scheduled we have to free the scheduling parameters */
407 if (SD_task_get_state(task) == SD_SCHEDULED)
408 __SD_task_destroy_scheduling_data(task);
410 if (task->name != NULL)
411 xbt_free(task->name);
413 xbt_dynar_free(&task->tasks_before);
414 xbt_dynar_free(&task->tasks_after);
417 /*printf("Task destroyed.\n");*/