2 #include "xbt/sysdep.h"
7 #include "xbt/config.h"
9 XBT_LOG_NEW_CATEGORY(sd,"Logging specific to SimDag");
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel,sd,
11 "Logging specific to SimDag (kernel)");
13 SD_global_t sd_global = NULL;
17 /* Copyright (c) 2007 Arnaud Legrand.
18 All rights reserved. */
20 /* This program is free software; you can redistribute it and/or modify it
21 * under the terms of the license (GNU LGPL) which comes with this package. */
23 static int _sd_init_status = 0; /* 0: beginning of time;
24 1: pre-inited (cfg_set created);
25 2: inited (running) */
26 static xbt_cfg_t _sd_cfg_set = NULL;
28 /* callback of the workstation_model variable */
29 static void _sd_cfg_cb__workstation_model(const char *name, int pos)
33 xbt_assert0(_sd_init_status < 2,
34 "Cannot change the model after the initialization");
36 val = xbt_cfg_get_string(_sd_cfg_set, name);
37 find_resource_description(surf_workstation_resource_description,
38 surf_workstation_resource_description_size,
42 /* callback of the cpu_model variable */
43 static void _sd_cfg_cb__cpu_model(const char *name, int pos)
47 xbt_assert0(_sd_init_status < 2,
48 "Cannot change the model after the initialization");
50 val = xbt_cfg_get_string(_sd_cfg_set, name);
51 find_resource_description(surf_cpu_resource_description,
52 surf_cpu_resource_description_size, val);
55 /* callback of the workstation_model variable */
56 static void _sd_cfg_cb__network_model(const char *name, int pos)
60 xbt_assert0(_sd_init_status < 2,
61 "Cannot change the model after the initialization");
63 val = xbt_cfg_get_string(_sd_cfg_set, name);
64 find_resource_description(surf_network_resource_description,
65 surf_network_resource_description_size, val);
68 /* create the config set and register what should be */
69 static void sd_config_init(void)
73 return; /* Already inited, nothing to do */
76 _sd_cfg_set = xbt_cfg_new();
78 xbt_cfg_register(_sd_cfg_set,
79 "workstation_model", xbt_cfgelm_string, 1, 1,
80 &_sd_cfg_cb__workstation_model, NULL);
82 xbt_cfg_register(_sd_cfg_set,
83 "cpu_model", xbt_cfgelm_string, 1, 1,
84 &_sd_cfg_cb__cpu_model, NULL);
85 xbt_cfg_register(_sd_cfg_set,
86 "network_model", xbt_cfgelm_string, 1, 1,
87 &_sd_cfg_cb__network_model, NULL);
89 xbt_cfg_set_string(_sd_cfg_set, "workstation_model", "ptask_L07");
92 static void sd_config_finalize(void)
96 return; /* Not initialized yet. Nothing to do */
98 xbt_cfg_free(&_sd_cfg_set);
102 static void sd_config(const char *name, va_list pa)
104 if (!_sd_init_status) {
107 xbt_cfg_set_vargs(_sd_cfg_set, name, pa);
111 static void __sd_config_helper(const char *name, ...)
121 static void sd_cfg_control_set(const char *control_string)
123 /* To split the string in commands, and the cursors */
124 xbt_dynar_t set_strings;
130 DEBUG1("Parse log settings '%s'", control_string);
132 /* split the string, and remove empty entries */
133 set_strings = xbt_str_split_quoted(control_string);
135 if (xbt_dynar_length(set_strings) == 0) { /* vicious user! */
136 xbt_dynar_free(&set_strings);
139 /* Parse each entry and either use it right now (if the category was already
140 created), or store it for further use */
141 xbt_dynar_foreach(set_strings, cpt, str) {
142 char *control_string, *control_string_sav, *name, *value;
145 control_string = control_string_sav = strdup(str);
146 control_string += strspn(control_string, " ");
147 name = control_string;
148 control_string += strcspn(str, ":=");
149 value = control_string;
153 xbt_assert1(strlen(name) != 0, "Invalid name for configuration: '%s'",
155 xbt_assert1(strlen(value) != 0,
156 "Invalid value for configuration: '%s'", value);
157 INFO2("setting '%s' to '%s'", name, value);
159 __sd_config_helper(name, value);
161 free(control_string_sav);
163 xbt_dynar_free(&set_strings);
166 static void sd_cfg_init(int *argc, char **argv)
171 for (i = 1; i < *argc; i++) {
172 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
173 opt = strchr(argv[i], '=');
176 sd_cfg_control_set(opt);
177 DEBUG1("Did apply '%s' as config setting", opt);
178 /*remove this from argv */
180 for (j = i + 1; j < *argc; j++) {
181 argv[j - 1] = argv[j];
186 i--; /* compensate effect of next loop incrementation */
192 * \brief Initialises SD internal data
194 * This function must be called before any other SD function. Then you
195 * should call SD_create_environment().
197 * \param argc argument number
198 * \param argv argument list
199 * \see SD_create_environment(), SD_exit()
201 void SD_init(int *argc, char **argv) {
205 xbt_assert0( !SD_INITIALISED() , "SD_init() already called");
207 sd_global = xbt_new(s_SD_global_t, 1);
208 sd_global->workstations = xbt_dict_new();
209 sd_global->workstation_count = 0;
210 sd_global->workstation_list = NULL;
211 sd_global->links = xbt_dict_new();
212 sd_global->link_count = 0;
213 sd_global->link_list = NULL;
214 sd_global->recyclable_route = NULL;
215 sd_global->watch_point_reached = 0;
217 sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
218 sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
219 sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
220 sd_global->in_fifo_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
221 sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
222 sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
223 sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
224 sd_global->task_number = 0;
226 surf_init(argc, argv);
227 sd_cfg_init(argc, argv);
231 * \brief Reinits the application part of the simulation (experimental feature)
233 * This function allows you to run several simulations on the same platform
234 * by resetting the part describing the application.
236 * @warning: this function is still experimental and not perfect. For example,
237 * the simulation clock (and traces usage) is not reset. So, do not use it if
238 * you use traces in your simulation, and do not use absolute timing after using it.
239 * That being said, this function is still precious if you want to compare a bunch of
240 * heuristics on the same platforms.
242 void SD_application_reinit(void) {
246 if (SD_INITIALISED()) {
247 DEBUG0("Recreating the swags...");
248 xbt_swag_free(sd_global->not_scheduled_task_set);
249 xbt_swag_free(sd_global->scheduled_task_set);
250 xbt_swag_free(sd_global->ready_task_set);
251 xbt_swag_free(sd_global->in_fifo_task_set);
252 xbt_swag_free(sd_global->running_task_set);
253 xbt_swag_free(sd_global->done_task_set);
254 xbt_swag_free(sd_global->failed_task_set);
256 sd_global->not_scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
257 sd_global->scheduled_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
258 sd_global->ready_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
259 sd_global->in_fifo_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
260 sd_global->running_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
261 sd_global->done_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
262 sd_global->failed_task_set = xbt_swag_new(xbt_swag_offset(task, state_hookup));
263 sd_global->task_number = 0;
265 WARN0("SD_application_reinit called before initialization of SimDag");
266 /* we cannot use exceptions here because xbt is not running! */
272 * \brief Creates the environment
274 * The environment (i.e. the \ref SD_workstation_management "workstations" and the
275 * \ref SD_link_management "links") is created with the data stored in the given XML
278 * \param platform_file name of an XML file describing the environment to create
279 * \see SD_workstation_management, SD_link_management
281 * The XML file follows this DTD:
283 * \include surfxml.dtd
285 * Here is a small example of such a platform:
287 * \include small_platform.xml
289 void SD_create_environment(const char *platform_file) {
290 xbt_dict_cursor_t cursor = NULL;
292 void *surf_workstation = NULL;
293 void *surf_link = NULL;
294 char *workstation_model_name;
295 int workstation_id = -1;
297 SD_CHECK_INIT_DONE();
299 DEBUG0("SD_create_environment");
302 surf_timer_resource_init(platform_file);
304 workstation_model_name =
305 xbt_cfg_get_string(_sd_cfg_set, "workstation_model");
307 DEBUG1("Model : %s", workstation_model_name);
309 find_resource_description(surf_workstation_resource_description,
310 surf_workstation_resource_description_size,
311 workstation_model_name);
312 if (!strcmp(workstation_model_name, "compound")) {
314 char *network_model_name = NULL;
315 char *cpu_model_name = NULL;
320 cpu_model_name = xbt_cfg_get_string(_sd_cfg_set, "cpu_model");
322 if (e.category == bound_error) {
324 "Set a cpu model to use with the 'compound' workstation model");
333 xbt_cfg_get_string(_sd_cfg_set, "network_model");
336 if (e.category == bound_error) {
338 "Set a network model to use with the 'compound' workstation model");
346 find_resource_description(surf_network_resource_description,
347 surf_network_resource_description_size,
350 find_resource_description(surf_cpu_resource_description,
351 surf_cpu_resource_description_size,
354 surf_cpu_resource_description[cpu_id].resource_init(platform_file);
355 surf_network_resource_description[network_id].resource_init(platform_file);
358 DEBUG0("Call workstation_resource_init");
359 surf_workstation_resource_description[workstation_id].
360 resource_init(platform_file);
364 /* now let's create the SD wrappers for workstations and links */
365 xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
366 __SD_workstation_create(surf_workstation, NULL);
369 xbt_dict_foreach(network_link_set, cursor, name, surf_link) {
370 __SD_link_create(surf_link, NULL);
373 DEBUG2("Workstation number: %d, link number: %d", SD_workstation_get_number(), SD_link_get_number());
377 * \brief Launches the simulation.
379 * The function will execute the \ref SD_READY ready tasks.
380 * The simulation will be stopped when its time reaches \a how_long,
381 * when a watch point is reached, or when no more task can be executed.
382 * Then you can call SD_simulate() again.
384 * \param how_long maximum duration of the simulation (a negative value means no time limit)
385 * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
386 * \see SD_task_schedule(), SD_task_watch()
388 SD_task_t* SD_simulate(double how_long)
390 double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
391 double elapsed_time = 0.0;
393 SD_dependency_t dependency;
394 surf_action_t action;
395 SD_task_t *changed_tasks = NULL;
396 int changed_task_number = 0;
397 int changed_task_capacity = sd_global->task_number + 1;
399 static int first_time = 1;
401 SD_CHECK_INIT_DONE();
403 INFO0("Starting simulation...");
405 /* create the array that will be returned */
406 changed_tasks = xbt_new(SD_task_t, changed_task_capacity);
407 changed_tasks[0] = NULL;
410 surf_solve(); /* Takes traces into account. Returns 0.0 */
415 surf_timer_resource->extension_public->set(surf_get_clock()+how_long,
418 sd_global->watch_point_reached = 0;
420 /* explore the ready tasks */
421 xbt_swag_foreach(task, sd_global->ready_task_set) {
422 INFO1("Executing task '%s'", SD_task_get_name(task));
423 if ((task->state_changed = __SD_task_try_to_run(task))) {
424 changed_tasks[changed_task_number++] = task; /* replace NULL by the task */
426 if (changed_task_number == changed_task_capacity) {
427 changed_task_capacity *= 2;
428 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
431 changed_tasks[changed_task_number] = NULL;
437 while (elapsed_time >= 0.0 &&
438 (how_long < 0.0 || total_time < how_long) &&
439 !sd_global->watch_point_reached) {
445 DEBUG1("Total time: %f", total_time);
447 elapsed_time = surf_solve();
448 DEBUG1("surf_solve() returns %f", elapsed_time);
449 if (elapsed_time > 0.0)
450 total_time += elapsed_time;
452 /* let's see which tasks are done */
453 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.done_action_set))) {
455 INFO1("Task '%s' done", SD_task_get_name(task));
456 DEBUG0("Calling __SD_task_just_done");
457 __SD_task_just_done(task);
458 DEBUG1("__SD_task_just_done called on task '%s'", SD_task_get_name(task));
460 /* the state has changed */
461 if (!task->state_changed) {
462 task->state_changed = 1;
463 changed_tasks[changed_task_number++] = task;
465 if (changed_task_number == changed_task_capacity) {
466 changed_task_capacity *= 2;
467 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
470 changed_tasks[changed_task_number] = NULL;
473 /* remove the dependencies after this task */
474 while (xbt_dynar_length(task->tasks_after) > 0) {
475 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
476 dst = dependency->dst;
477 SD_task_dependency_remove(task, dst);
479 /* is dst ready now? */
480 if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
481 INFO1("Executing task '%s'", SD_task_get_name(dst));
482 if (__SD_task_try_to_run(dst)) {
483 changed_tasks[changed_task_number++] = dst;
485 if (changed_task_number == changed_task_capacity) {
486 changed_task_capacity *= 2;
487 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
490 changed_tasks[changed_task_number] = NULL;
496 /* let's see which tasks have just failed */
497 while ((action = xbt_swag_extract(surf_workstation_resource->common_public->states.failed_action_set))) {
499 INFO1("Task '%s' failed", SD_task_get_name(task));
500 __SD_task_set_state(task, SD_FAILED);
501 surf_workstation_resource->common_public->action_free(action);
502 task->surf_action = NULL;
504 if (!task->state_changed) {
505 task->state_changed = 1;
506 changed_tasks[changed_task_number++] = task;
508 if (changed_task_number == changed_task_capacity) {
509 changed_task_capacity *= 2;
510 changed_tasks = xbt_realloc(changed_tasks, sizeof(SD_task_t) * changed_task_capacity);
513 changed_tasks[changed_task_number] = NULL;
517 while (surf_timer_resource->extension_public->get(&fun,(void*)&arg)) {
521 /* we must reset every task->state_changed */
523 while (changed_tasks[i] != NULL) {
524 changed_tasks[i]->state_changed = 0;
528 INFO0("Simulation finished");
529 DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d", elapsed_time, total_time, sd_global->watch_point_reached);
530 DEBUG1("current time = %f", surf_get_clock());
532 return changed_tasks;
536 * \brief Returns the current clock
538 * \return the current clock, in second
540 double SD_get_clock(void) {
541 SD_CHECK_INIT_DONE();
543 return surf_get_clock();
547 * \brief Destroys all SD internal data
549 * This function should be called when the simulation is over. Don't forget also to destroy
552 * \see SD_init(), SD_task_destroy()
555 if (SD_INITIALISED()) {
556 DEBUG0("Destroying workstation and link dictionaries...");
557 xbt_dict_free(&sd_global->workstations);
558 xbt_dict_free(&sd_global->links);
560 DEBUG0("Destroying workstation and link arrays if necessary...");
561 if (sd_global->workstation_list != NULL)
562 xbt_free(sd_global->workstation_list);
564 if (sd_global->link_list != NULL)
565 xbt_free(sd_global->link_list);
567 if (sd_global->recyclable_route != NULL)
568 xbt_free(sd_global->recyclable_route);
570 DEBUG0("Destroying the swags...");
571 xbt_swag_free(sd_global->not_scheduled_task_set);
572 xbt_swag_free(sd_global->scheduled_task_set);
573 xbt_swag_free(sd_global->ready_task_set);
574 xbt_swag_free(sd_global->in_fifo_task_set);
575 xbt_swag_free(sd_global->running_task_set);
576 xbt_swag_free(sd_global->done_task_set);
577 xbt_swag_free(sd_global->failed_task_set);
582 DEBUG0("Exiting Surf...");
586 WARN0("SD_exit() called, but SimDag is not running");
587 /* we cannot use exceptions here because xbt is not running! */