2 #include "simdag/simdag.h"
3 #include "xbt/sysdep.h"
6 static void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state);
10 SD_task_t SD_task_create(const char *name, void *data, double amount) {
12 xbt_assert0(amount > 0, "amount must be positive");
14 SD_task_t task = xbt_new0(s_SD_task_t, 1);
16 /* general information */
17 task->data = data; /* user data */
19 task->name = xbt_strdup(name);
23 task->state_set = sd_global->not_scheduled_task_set;
24 xbt_swag_insert(task,task->state_set);
26 task->amount = amount;
27 task->surf_action = NULL;
28 task->watch_points = 0;
31 task->tasks_before = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
32 task->tasks_after = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
34 /* scheduling parameters */
35 task->workstation_nb = 0;
36 task->workstation_list = NULL;
37 task->computation_amount = NULL;
38 task->communication_amount = NULL;
41 xbt_dynar_push(sd_global->tasks, &task);
46 /* Returns the data of a task.
48 void* SD_task_get_data(SD_task_t task) {
50 xbt_assert0(task != NULL, "Invalid parameter");
54 /* Returns the state of a task: SD_NOT_SCHEDULED, SD_SCHEDULED, SD_RUNNING, SD_DONE or SD_FAILED.
56 e_SD_task_state_t SD_task_get_state(SD_task_t task) {
58 xbt_assert0(task != NULL, "Invalid parameter");
60 if (task->state_set == sd_global->not_scheduled_task_set)
61 return SD_NOT_SCHEDULED;
62 if (task->state_set == sd_global->scheduled_task_set)
64 if (task->state_set == sd_global->running_task_set)
66 if (task->state_set == sd_global->done_task_set)
71 /* Changes the state of a task. Update the swags and the flag sd_global->watch_point_reached.
73 static void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state) {
74 xbt_swag_remove(task, task->state_set);
76 case SD_NOT_SCHEDULED:
77 task->state_set = sd_global->not_scheduled_task_set;
80 task->state_set = sd_global->scheduled_task_set;
83 task->state_set = sd_global->running_task_set;
86 task->state_set = sd_global->done_task_set;
88 default: /* SD_FAILED */
89 task->state_set = sd_global->failed_task_set;
91 xbt_swag_insert(task,task->state_set);
93 if (task->watch_points & new_state) {
94 printf("Watch point reached with task '%s' in state %d!\n", SD_task_get_name(task), new_state);
95 sd_global->watch_point_reached = 1;
99 /* Sets the data of a task.
101 void SD_task_set_data(SD_task_t task, void *data) {
102 SD_CHECK_INIT_DONE();
103 xbt_assert0(task != NULL, "Invalid parameter");
107 /* Returns the name of a task. The name can be NULL.
109 const char* SD_task_get_name(SD_task_t task) {
110 SD_CHECK_INIT_DONE();
111 xbt_assert0(task != NULL, "Invalid parameter");
115 /* Returns the computing amount of a task.
117 double SD_task_get_amount(SD_task_t task) {
118 SD_CHECK_INIT_DONE();
119 xbt_assert0(task != NULL, "Invalid parameter");
123 /* Returns the remaining computing amount of a task.
125 double SD_task_get_remaining_amount(SD_task_t task) {
126 SD_CHECK_INIT_DONE();
127 xbt_assert0(task != NULL, "Invalid parameter");
129 if (task->surf_action)
132 return task->surf_action->remains;
135 /* temporary function for debbuging
136 void __SD_print_dependencies(SD_task_t task) {
137 printf("The following tasks must be executed before %s:", SD_task_get_name(task));
138 xbt_dynar_t dynar = task->tasks_before;
139 int length = xbt_dynar_length(dynar);
141 SD_dependency_t dependency;
142 for (i = 0; i < length; i++) {
143 xbt_dynar_get_cpy(dynar, i, &dependency);
144 printf(" %s", SD_task_get_name(dependency->src));
147 printf("\nThe following tasks must be executed after %s:", SD_task_get_name(task));
149 dynar = task->tasks_after;
150 length = xbt_dynar_length(dynar);
151 for (i = 0; i < length; i++) {
152 xbt_dynar_get_cpy(dynar, i, &dependency);
153 printf(" %s", SD_task_get_name(dependency->dst));
155 printf("\n----------------------------\n");
158 /* Destroys a dependency between two tasks.
160 void __SD_task_destroy_dependency(void *dependency) {
161 if (((SD_dependency_t) dependency)->name != NULL)
162 xbt_free(((SD_dependency_t) dependency)->name);
163 xbt_free(dependency);
166 /* Adds a dependency between two tasks.
168 void SD_task_dependency_add(const char *name, void *data, SD_task_t src, SD_task_t dst) {
169 SD_CHECK_INIT_DONE();
170 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
171 xbt_assert1(src != dst, "Cannot add a dependency between task '%s' and itself", SD_task_get_name(src));
173 xbt_dynar_t dynar = src->tasks_after;
174 int length = xbt_dynar_length(dynar);
177 SD_dependency_t dependency;
178 for (i = 0; i < length && !found; i++) {
179 xbt_dynar_get_cpy(dynar, i, &dependency);
180 found = (dependency->dst == dst);
182 xbt_assert2(!found, "A dependency already exists between task '%s' and task '%s'", SD_task_get_name(src), SD_task_get_name(dst));
184 dependency = xbt_new0(s_SD_dependency_t, 1);
187 dependency->name = xbt_strdup(name);
188 dependency->data = data;
189 dependency->src = src;
190 dependency->dst = dst;
192 /* src must be executed before dst */
193 xbt_dynar_push(src->tasks_after, &dependency);
194 xbt_dynar_push(dst->tasks_before, &dependency);
196 /* __SD_print_dependencies(src);
197 __SD_print_dependencies(dst); */
200 /* Removes a dependency between two tasks.
202 void SD_task_dependency_remove(SD_task_t src, SD_task_t dst) {
203 SD_CHECK_INIT_DONE();
204 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
205 xbt_assert1(src != dst, "Cannot remove a dependency between task '%s' and itself", SD_task_get_name(src));
207 xbt_dynar_t dynar = src->tasks_after;
208 int length = xbt_dynar_length(dynar);
211 SD_dependency_t dependency;
212 for (i = 0; i < length && !found; i++) {
213 xbt_dynar_get_cpy(dynar, i, &dependency);
214 if (dependency->dst == dst) {
215 xbt_dynar_remove_at(dynar, i, NULL);
219 xbt_assert4(found, "No dependency found between task '%s' and '%s': task '%s' is not a successor of task '%s'",
220 SD_task_get_name(src), SD_task_get_name(dst), SD_task_get_name(dst), SD_task_get_name(src));
222 dynar = dst->tasks_before;
223 length = xbt_dynar_length(dynar);
226 for (i = 0; i < length && !found; i++) {
227 xbt_dynar_get_cpy(dynar, i, &dependency);
228 if (dependency->src == src) {
229 xbt_dynar_remove_at(dynar, i, NULL);
230 __SD_task_destroy_dependency(dependency);
234 xbt_assert4(found, "SimDag error: task '%s' is a successor of '%s' but task '%s' is not a predecessor of task '%s'",
235 SD_task_get_name(dst), SD_task_get_name(src), SD_task_get_name(src), SD_task_get_name(dst)); /* should never happen... */
237 /* __SD_print_dependencies(src);
238 __SD_print_dependencies(dst); */
241 /* Returns the data associated to a dependency between two tasks. This data can be NULL.
243 void *SD_task_dependency_get_data(SD_task_t src, SD_task_t dst) {
244 SD_CHECK_INIT_DONE();
245 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
246 xbt_assert1(src != dst, "Cannot have a dependency between task '%s' and itself", SD_task_get_name(src));
248 xbt_dynar_t dynar = src->tasks_after;
249 int length = xbt_dynar_length(dynar);
252 SD_dependency_t dependency;
253 for (i = 0; i < length && !found; i++) {
254 xbt_dynar_get_cpy(dynar, i, &dependency);
255 found = (dependency->dst == dst);
257 xbt_assert2(found, "No dependency found between task '%s' and '%s'", SD_task_get_name(src), SD_task_get_name(dst));
258 return dependency->data;
261 /* temporary function for debugging */
262 static void __SD_print_watch_points(SD_task_t task) {
263 static const int state_masks[] = {SD_SCHEDULED, SD_RUNNING, SD_DONE, SD_FAILED};
264 static const char* state_names[] = {"scheduled", "running", "done", "failed"};
266 printf("Task '%s' watch points (%x): ", SD_task_get_name(task), task->watch_points);
269 for (i = 0; i < 4; i++) {
270 if (task->watch_points & state_masks[i])
271 printf("%s ", state_names[i]);
276 /* Adds a watch point to a task.
277 SD_simulate will stop as soon as the state of this task is the one given in argument.
278 Watch point is then automatically removed.
280 void SD_task_watch(SD_task_t task, e_SD_task_state_t state) {
281 SD_CHECK_INIT_DONE();
282 xbt_assert0(task != NULL, "Invalid parameter");
284 task->watch_points = task->watch_points | state;
285 __SD_print_watch_points(task);
288 /* Removes a watch point from a task.
290 void SD_task_unwatch(SD_task_t task, e_SD_task_state_t state) {
291 SD_CHECK_INIT_DONE();
292 xbt_assert0(task != NULL, "Invalid parameter");
294 task->watch_points = task->watch_points & ~state;
295 __SD_print_watch_points(task);
298 /* Destroys the data memorised by SD_task_schedule. Task state must be SD_SCHEDULED.
300 static void __SD_task_destroy_scheduling_data(SD_task_t task) {
301 xbt_free(task->workstation_list);
302 xbt_free(task->computation_amount);
303 xbt_free(task->communication_amount);
307 * task: the task to schedule
308 * workstation_nb: number of workstations where the task will be executed
309 * workstation_list: workstations where the task will be executed
310 * computation_amount: computation amount for each workstation
311 * communication_amount: communication amount between each pair of workstations
312 * rate: task execution speed rate
314 void SD_task_schedule(SD_task_t task, int workstation_nb,
315 const SD_workstation_t *workstation_list, double *computation_amount,
316 double *communication_amount, double rate) {
317 SD_CHECK_INIT_DONE();
318 xbt_assert0(task, "Invalid parameter");
319 xbt_assert1(SD_task_get_state(task) == SD_NOT_SCHEDULED, "Task '%s' has already been scheduled.", SD_task_get_name(task));
320 xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
322 task->workstation_nb = workstation_nb;
325 task->computation_amount = xbt_new0(double, workstation_nb);
326 memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
328 int communication_nb = workstation_nb * workstation_nb;
329 task->communication_amount = xbt_new0(double, communication_nb);
330 memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
332 /* we have to create a Surf workstation array instead of the SimDag workstation array */
333 task->workstation_list = xbt_new0(void*, workstation_nb);
335 for (i = 0; i < workstation_nb; i++) {
336 task->workstation_list[i] = workstation_list[i]->surf_workstation;
339 __SD_task_set_state(task, SD_SCHEDULED);
342 /* Unschedules a task. The state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED.
343 * The task is reinitialised and its state becomes SD_NOT_SCHEDULED.
344 * Call SD_task_schedule to schedule it again.
346 void SD_task_unschedule(SD_task_t task) {
347 SD_CHECK_INIT_DONE();
348 xbt_assert0(task != NULL, "Invalid parameter");
349 e_SD_task_state_t state = SD_task_get_state(task);
350 xbt_assert1(state == SD_SCHEDULED ||
351 state == SD_RUNNING ||
353 "Task %s: the state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED", SD_task_get_name(task));
355 if (state == SD_SCHEDULED)
356 __SD_task_destroy_scheduling_data(task);
358 __SD_task_set_state(task, SD_NOT_SCHEDULED);
361 /* Runs a task. This function is called by SD_simulate when a scheduled task can start
362 * (ie when its dependencies are satisfied).
364 surf_action_t __SD_task_run(SD_task_t task) {
365 SD_CHECK_INIT_DONE();
366 xbt_assert0(task != NULL, "Invalid parameter");
369 surf_action_t surf_action = surf_workstation_resource->extension_public->
370 execute_parallel_task(task->workstation_nb,
371 task->workstation_list,
372 task->computation_amount,
373 task->communication_amount,
376 __SD_task_set_state(task, SD_RUNNING);
378 __SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
383 /* Destroys a task. The user data (if any) should have been destroyed first.
385 void SD_task_destroy(SD_task_t task) {
386 SD_CHECK_INIT_DONE();
387 xbt_assert0(task != NULL, "Invalid parameter");
389 /*printf("Destroying task %s...\n", SD_task_get_name(task));*/
391 /* remove the task from SimDag task list */
392 int index = xbt_dynar_search(sd_global->tasks, &task);
393 xbt_dynar_remove_at(sd_global->tasks, index, NULL);
395 /* we must destroy the dependencies carefuly (with SD_dependency_remove)
396 because each one is stored twice */
397 SD_dependency_t dependency;
398 while (xbt_dynar_length(task->tasks_before) > 0) {
399 xbt_dynar_get_cpy(task->tasks_before, 0, &dependency);
400 SD_task_dependency_remove(dependency->src, dependency->dst);
403 while (xbt_dynar_length(task->tasks_after) > 0) {
404 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
405 SD_task_dependency_remove(dependency->src, dependency->dst);
408 /* if the task was scheduled we have to free the scheduling parameters */
409 if (SD_task_get_state(task) == SD_SCHEDULED)
410 __SD_task_destroy_scheduling_data(task);
412 if (task->name != NULL)
413 xbt_free(task->name);
415 xbt_dynar_free(&task->tasks_before);
416 xbt_dynar_free(&task->tasks_after);
419 /*printf("Task destroyed.\n");*/