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 task->amount = amount;
25 task->surf_action = NULL;
26 task->watch_points = 0;
29 task->tasks_before = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
30 task->tasks_after = xbt_dynar_new(sizeof(SD_dependency_t), NULL);
32 /* scheduling parameters */
33 task->workstation_nb = 0;
34 task->workstation_list = NULL;
35 task->computation_amount = NULL;
36 task->communication_amount = NULL;
39 xbt_dynar_push(sd_global->tasks, &task);
44 /* Returns the data of a task.
46 void* SD_task_get_data(SD_task_t task) {
48 xbt_assert0(task != NULL, "Invalid parameter");
52 /* Returns the state of a task: SD_NOT_SCHEDULED, SD_SCHEDULED, SD_RUNNING, SD_DONE or SD_FAILED.
54 e_SD_task_state_t SD_task_get_state(SD_task_t task) {
56 xbt_assert0(task != NULL, "Invalid parameter");
58 if (task->state_set == sd_global->not_scheduled_task_set)
59 return SD_NOT_SCHEDULED;
60 if (task->state_set == sd_global->scheduled_task_set)
62 if (task->state_set == sd_global->running_task_set)
64 if (task->state_set == sd_global->done_task_set)
69 /* Changes the state of a task and update the swags.
71 static void __SD_task_set_state(SD_task_t task, e_SD_task_state_t new_state) {
72 xbt_swag_remove(task, task->state_set);
74 case SD_NOT_SCHEDULED:
75 task->state_set = sd_global->not_scheduled_task_set;
78 task->state_set = sd_global->scheduled_task_set;
81 task->state_set = sd_global->running_task_set;
84 task->state_set = sd_global->done_task_set;
86 default: /* SD_FAILED */
87 task->state_set = sd_global->failed_task_set;
91 /* Sets the data of a task.
93 void SD_task_set_data(SD_task_t task, void *data) {
95 xbt_assert0(task != NULL, "Invalid parameter");
99 /* Returns the name of a task. The name can be NULL.
101 const char* SD_task_get_name(SD_task_t task) {
102 SD_CHECK_INIT_DONE();
103 xbt_assert0(task != NULL, "Invalid parameter");
107 /* Returns the computing amount of a task.
109 double SD_task_get_amount(SD_task_t task) {
110 SD_CHECK_INIT_DONE();
111 xbt_assert0(task != NULL, "Invalid parameter");
115 /* Returns the remaining computing amount of a task.
117 double SD_task_get_remaining_amount(SD_task_t task) {
118 SD_CHECK_INIT_DONE();
119 xbt_assert0(task != NULL, "Invalid parameter");
121 if (task->surf_action)
124 return task->surf_action->remains;
127 /* temporary function for debbuging
128 void __SD_print_dependencies(SD_task_t task) {
129 printf("The following tasks must be executed before %s:", SD_task_get_name(task));
130 xbt_dynar_t dynar = task->tasks_before;
131 int length = xbt_dynar_length(dynar);
133 SD_dependency_t dependency;
134 for (i = 0; i < length; i++) {
135 xbt_dynar_get_cpy(dynar, i, &dependency);
136 printf(" %s", SD_task_get_name(dependency->src));
139 printf("\nThe following tasks must be executed after %s:", SD_task_get_name(task));
141 dynar = task->tasks_after;
142 length = xbt_dynar_length(dynar);
143 for (i = 0; i < length; i++) {
144 xbt_dynar_get_cpy(dynar, i, &dependency);
145 printf(" %s", SD_task_get_name(dependency->dst));
147 printf("\n----------------------------\n");
150 /* Destroys a dependency between two tasks.
152 void __SD_task_destroy_dependency(void *dependency) {
153 if (((SD_dependency_t) dependency)->name != NULL)
154 xbt_free(((SD_dependency_t) dependency)->name);
155 xbt_free(dependency);
158 /* Adds a dependency between two tasks.
160 void SD_task_dependency_add(const char *name, void *data, SD_task_t src, SD_task_t dst) {
161 SD_CHECK_INIT_DONE();
162 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
163 xbt_assert1(src != dst, "Cannot add a dependency between task '%s' and itself", SD_task_get_name(src));
165 xbt_dynar_t dynar = src->tasks_after;
166 int length = xbt_dynar_length(dynar);
169 SD_dependency_t dependency;
170 for (i = 0; i < length && !found; i++) {
171 xbt_dynar_get_cpy(dynar, i, &dependency);
172 found = (dependency->dst == dst);
174 xbt_assert2(!found, "A dependency already exists between task '%s' and task '%s'", SD_task_get_name(src), SD_task_get_name(dst));
176 dependency = xbt_new0(s_SD_dependency_t, 1);
179 dependency->name = xbt_strdup(name);
180 dependency->data = data;
181 dependency->src = src;
182 dependency->dst = dst;
184 /* src must be executed before dst */
185 xbt_dynar_push(src->tasks_after, &dependency);
186 xbt_dynar_push(dst->tasks_before, &dependency);
188 /* __SD_print_dependencies(src);
189 __SD_print_dependencies(dst); */
192 /* Removes a dependency between two tasks.
194 void SD_task_dependency_remove(SD_task_t src, SD_task_t dst) {
195 SD_CHECK_INIT_DONE();
196 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
197 xbt_assert1(src != dst, "Cannot remove a dependency between task '%s' and itself", SD_task_get_name(src));
199 xbt_dynar_t dynar = src->tasks_after;
200 int length = xbt_dynar_length(dynar);
203 SD_dependency_t dependency;
204 for (i = 0; i < length && !found; i++) {
205 xbt_dynar_get_cpy(dynar, i, &dependency);
206 if (dependency->dst == dst) {
207 xbt_dynar_remove_at(dynar, i, NULL);
211 xbt_assert4(found, "No dependency found between task '%s' and '%s': task '%s' is not a successor of task '%s'",
212 SD_task_get_name(src), SD_task_get_name(dst), SD_task_get_name(dst), SD_task_get_name(src));
214 dynar = dst->tasks_before;
215 length = xbt_dynar_length(dynar);
218 for (i = 0; i < length && !found; i++) {
219 xbt_dynar_get_cpy(dynar, i, &dependency);
220 if (dependency->src == src) {
221 xbt_dynar_remove_at(dynar, i, NULL);
222 __SD_task_destroy_dependency(dependency);
226 xbt_assert4(found, "SimDag error: task '%s' is a successor of '%s' but task '%s' is not a predecessor of task '%s'",
227 SD_task_get_name(dst), SD_task_get_name(src), SD_task_get_name(src), SD_task_get_name(dst)); /* should never happen... */
229 /* __SD_print_dependencies(src);
230 __SD_print_dependencies(dst); */
233 /* Returns the data associated to a dependency between two tasks. This data can be NULL.
235 void *SD_task_dependency_get_data(SD_task_t src, SD_task_t dst) {
236 SD_CHECK_INIT_DONE();
237 xbt_assert0(src != NULL && dst != NULL, "Invalid parameter");
238 xbt_assert1(src != dst, "Cannot have a dependency between task '%s' and itself", SD_task_get_name(src));
240 xbt_dynar_t dynar = src->tasks_after;
241 int length = xbt_dynar_length(dynar);
244 SD_dependency_t dependency;
245 for (i = 0; i < length && !found; i++) {
246 xbt_dynar_get_cpy(dynar, i, &dependency);
247 found = (dependency->dst == dst);
249 xbt_assert2(found, "No dependency found between task '%s' and '%s'", SD_task_get_name(src), SD_task_get_name(dst));
250 return dependency->data;
253 /* temporary function for debugging */
254 static void __SD_print_watch_points(SD_task_t task) {
255 static const int state_masks[] = {SD_SCHEDULED, SD_RUNNING, SD_DONE, SD_FAILED};
256 static const char* state_names[] = {"scheduled", "running", "done", "failed"};
258 printf("Task '%s' watch points (%x): ", SD_task_get_name(task), task->watch_points);
261 for (i = 0; i < 4; i++) {
262 if (task->watch_points & state_masks[i])
263 printf("%s ", state_names[i]);
268 /* Adds a watch point to a task.
269 SD_simulate will stop as soon as the state of this task is the one given in argument.
270 Watch point is then automatically removed.
272 void SD_task_watch(SD_task_t task, e_SD_task_state_t state) {
273 SD_CHECK_INIT_DONE();
274 xbt_assert0(task != NULL, "Invalid parameter");
276 task->watch_points = task->watch_points | state;
277 __SD_print_watch_points(task);
280 /* Removes a watch point from a task.
282 void SD_task_unwatch(SD_task_t task, e_SD_task_state_t state) {
283 SD_CHECK_INIT_DONE();
284 xbt_assert0(task != NULL, "Invalid parameter");
286 task->watch_points = task->watch_points & ~state;
287 __SD_print_watch_points(task);
290 /* Destroys the data memorised by SD_task_schedule. Task state must be SD_SCHEDULED.
292 static void __SD_task_destroy_scheduling_data(SD_task_t task) {
293 xbt_free(task->workstation_list);
294 xbt_free(task->computation_amount);
295 xbt_free(task->communication_amount);
299 * task: the task to schedule
300 * workstation_nb: number of workstations where the task will be executed
301 * workstation_list: workstations where the task will be executed
302 * computation_amount: computation amount for each workstation
303 * communication_amount: communication amount between each pair of workstations
304 * rate: task execution speed rate
306 void SD_task_schedule(SD_task_t task, int workstation_nb,
307 const SD_workstation_t *workstation_list, double *computation_amount,
308 double *communication_amount, double rate) {
309 SD_CHECK_INIT_DONE();
310 xbt_assert0(task, "Invalid parameter");
311 xbt_assert1(SD_task_get_state(task) == SD_NOT_SCHEDULED, "Task '%s' has already been scheduled.", SD_task_get_name(task));
312 xbt_assert0(workstation_nb > 0, "workstation_nb must be positive");
314 task->workstation_nb = workstation_nb;
317 task->computation_amount = xbt_new0(double, workstation_nb);
318 memcpy(task->computation_amount, computation_amount, sizeof(double) * workstation_nb);
320 int communication_nb = workstation_nb * workstation_nb;
321 task->communication_amount = xbt_new0(double, communication_nb);
322 memcpy(task->communication_amount, communication_amount, sizeof(double) * communication_nb);
324 /* we have to create a Surf workstation array instead of the SimDag workstation array */
325 task->workstation_list = xbt_new0(void*, workstation_nb);
327 for (i = 0; i < workstation_nb; i++) {
328 task->workstation_list[i] = workstation_list[i]->surf_workstation;
331 __SD_task_set_state(task, SD_SCHEDULED);
334 /* Unschedules a task. The state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED.
335 * The task is reinitialised and its state becomes SD_NOT_SCHEDULED.
336 * Call SD_task_schedule to schedule it again.
338 void SD_task_unschedule(SD_task_t task) {
339 SD_CHECK_INIT_DONE();
340 xbt_assert0(task != NULL, "Invalid parameter");
341 e_SD_task_state_t state = SD_task_get_state(task);
342 xbt_assert1(state == SD_SCHEDULED ||
343 state == SD_RUNNING ||
345 "Task %s: the state must be SD_SCHEDULED, SD_RUNNING or SD_FAILED", SD_task_get_name(task));
347 if (state == SD_SCHEDULED)
348 __SD_task_destroy_scheduling_data(task);
350 __SD_task_set_state(task, SD_NOT_SCHEDULED);
353 /* Runs a task. This function is called by SD_simulate when a scheduled task can start
354 * (ie when its dependencies are satisfied).
356 surf_action_t __SD_task_run(SD_task_t task) {
357 SD_CHECK_INIT_DONE();
358 xbt_assert0(task != NULL, "Invalid parameter");
361 surf_action_t surf_action = surf_workstation_resource->extension_public->
362 execute_parallel_task(task->workstation_nb,
363 task->workstation_list,
364 task->computation_amount,
365 task->communication_amount,
368 __SD_task_set_state(task, SD_RUNNING);
370 __SD_task_destroy_scheduling_data(task); /* now the scheduling data are not useful anymore */
375 /* Destroys a task. The user data (if any) should have been destroyed first.
377 void SD_task_destroy(SD_task_t task) {
378 SD_CHECK_INIT_DONE();
379 xbt_assert0(task != NULL, "Invalid parameter");
381 /*printf("Destroying task %s...\n", SD_task_get_name(task));*/
383 /* remove the task from SimDag task list */
384 int index = xbt_dynar_search(sd_global->tasks, &task);
385 xbt_dynar_remove_at(sd_global->tasks, index, NULL);
387 /* we must destroy the dependencies carefuly (with SD_dependency_remove)
388 because each one is stored twice */
389 SD_dependency_t dependency;
390 while (xbt_dynar_length(task->tasks_before) > 0) {
391 xbt_dynar_get_cpy(task->tasks_before, 0, &dependency);
392 SD_task_dependency_remove(dependency->src, dependency->dst);
395 while (xbt_dynar_length(task->tasks_after) > 0) {
396 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
397 SD_task_dependency_remove(dependency->src, dependency->dst);
400 /* if the task was scheduled we have to free the scheduling parameters */
401 if (SD_task_get_state(task) == SD_SCHEDULED)
402 __SD_task_destroy_scheduling_data(task);
404 if (task->name != NULL)
405 xbt_free(task->name);
407 xbt_dynar_free(&task->tasks_before);
408 xbt_dynar_free(&task->tasks_after);
411 /*printf("Task destroyed.\n");*/