2 #include "xbt/sysdep.h"
8 #include "xbt/config.h"
10 XBT_LOG_NEW_CATEGORY(sd, "Logging specific to SimDag");
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sd_kernel, sd,
12 "Logging specific to SimDag (kernel)");
14 SD_global_t sd_global = NULL;
18 /* Copyright (c) 2007 Arnaud Legrand.
19 All rights reserved. */
21 /* This program is free software; you can redistribute it and/or modify it
22 * under the terms of the license (GNU LGPL) which comes with this package. */
24 static int _sd_init_status = 0; /* 0: beginning of time;
25 1: pre-inited (cfg_set created);
26 2: inited (running) */
27 static xbt_cfg_t _sd_cfg_set = NULL;
29 /* callback of the workstation_model variable */
30 static void _sd_cfg_cb__workstation_model(const char *name, int pos)
34 xbt_assert0(_sd_init_status < 2,
35 "Cannot change the model after the initialization");
37 val = xbt_cfg_get_string(_sd_cfg_set, name);
38 find_model_description(surf_workstation_model_description, val);
41 /* callback of the cpu_model variable */
42 static void _sd_cfg_cb__cpu_model(const char *name, int pos)
46 xbt_assert0(_sd_init_status < 2,
47 "Cannot change the model after the initialization");
49 val = xbt_cfg_get_string(_sd_cfg_set, name);
50 find_model_description(surf_cpu_model_description, val);
53 /* callback of the workstation_model variable */
54 static void _sd_cfg_cb__network_model(const char *name, int pos)
58 xbt_assert0(_sd_init_status < 2,
59 "Cannot change the model after the initialization");
61 val = xbt_cfg_get_string(_sd_cfg_set, name);
62 find_model_description(surf_network_model_description, val);
65 XBT_LOG_EXTERNAL_CATEGORY(sd_kernel);
66 XBT_LOG_EXTERNAL_CATEGORY(sd_task);
67 XBT_LOG_EXTERNAL_CATEGORY(sd_workstation);
69 /* create the config set and register what should be */
70 static void sd_config_init(void)
74 return; /* Already inited, nothing to do */
76 /* Connect our log channels: that must be done manually under windows */
77 XBT_LOG_CONNECT(sd_kernel, sd);
78 XBT_LOG_CONNECT(sd_task, sd);
79 XBT_LOG_CONNECT(sd_workstation, sd);
82 _sd_cfg_set = xbt_cfg_new();
84 xbt_cfg_register(_sd_cfg_set,
85 "workstation_model", xbt_cfgelm_string, 1, 1,
86 &_sd_cfg_cb__workstation_model, NULL);
88 xbt_cfg_register(_sd_cfg_set,
89 "cpu_model", xbt_cfgelm_string, 1, 1,
90 &_sd_cfg_cb__cpu_model, NULL);
91 xbt_cfg_register(_sd_cfg_set,
92 "network_model", xbt_cfgelm_string, 1, 1,
93 &_sd_cfg_cb__network_model, NULL);
95 xbt_cfg_set_string(_sd_cfg_set, "workstation_model", "ptask_L07");
98 static void sd_config_finalize(void)
101 if (!_sd_init_status)
102 return; /* Not initialized yet. Nothing to do */
104 xbt_cfg_free(&_sd_cfg_set);
108 static void sd_config(const char *name, va_list pa)
110 if (!_sd_init_status) {
113 xbt_cfg_set_vargs(_sd_cfg_set, name, pa);
117 static void __sd_config_helper(const char *name, ...)
127 static void sd_cfg_control_set(const char *control_string)
129 /* To split the string in commands, and the cursors */
130 xbt_dynar_t set_strings;
136 DEBUG1("Parse log settings '%s'", control_string);
138 /* split the string, and remove empty entries */
139 set_strings = xbt_str_split_quoted(control_string);
141 if (xbt_dynar_length(set_strings) == 0) { /* vicious user! */
142 xbt_dynar_free(&set_strings);
145 /* Parse each entry and either use it right now (if the category was already
146 created), or store it for further use */
147 xbt_dynar_foreach(set_strings, cpt, str) {
148 char *control_string, *control_string_sav, *name, *value;
151 control_string = control_string_sav = strdup(str);
152 control_string += strspn(control_string, " ");
153 name = control_string;
154 control_string += strcspn(str, ":=");
155 value = control_string;
159 xbt_assert1(strlen(name) != 0, "Invalid name for configuration: '%s'",
161 xbt_assert1(strlen(value) != 0,
162 "Invalid value for configuration: '%s'", value);
163 INFO2("setting '%s' to '%s'", name, value);
165 __sd_config_helper(name, value);
167 free(control_string_sav);
169 xbt_dynar_free(&set_strings);
172 static void sd_cfg_init(int *argc, char **argv)
177 for (i = 1; i < *argc; i++) {
178 if (!strncmp(argv[i], "--cfg=", strlen("--cfg="))) {
179 opt = strchr(argv[i], '=');
182 sd_cfg_control_set(opt);
183 DEBUG1("Did apply '%s' as config setting", opt);
184 /*remove this from argv */
186 for (j = i + 1; j < *argc; j++) {
187 argv[j - 1] = argv[j];
192 i--; /* compensate effect of next loop incrementation */
198 * \brief Initialises SD internal data
200 * This function must be called before any other SD function. Then you
201 * should call SD_create_environment().
203 * \param argc argument number
204 * \param argv argument list
205 * \see SD_create_environment(), SD_exit()
207 void SD_init(int *argc, char **argv)
212 xbt_assert0(!SD_INITIALISED(), "SD_init() already called");
214 sd_global = xbt_new(s_SD_global_t, 1);
215 sd_global->workstations = xbt_dict_new();
216 sd_global->workstation_count = 0;
217 sd_global->workstation_list = NULL;
218 sd_global->links = xbt_dict_new();
219 sd_global->link_count = 0;
220 sd_global->link_list = NULL;
221 sd_global->recyclable_route = NULL;
222 sd_global->watch_point_reached = 0;
224 sd_global->not_scheduled_task_set =
225 xbt_swag_new(xbt_swag_offset(task, state_hookup));
226 sd_global->scheduled_task_set =
227 xbt_swag_new(xbt_swag_offset(task, state_hookup));
228 sd_global->ready_task_set =
229 xbt_swag_new(xbt_swag_offset(task, state_hookup));
230 sd_global->in_fifo_task_set =
231 xbt_swag_new(xbt_swag_offset(task, state_hookup));
232 sd_global->running_task_set =
233 xbt_swag_new(xbt_swag_offset(task, state_hookup));
234 sd_global->done_task_set =
235 xbt_swag_new(xbt_swag_offset(task, state_hookup));
236 sd_global->failed_task_set =
237 xbt_swag_new(xbt_swag_offset(task, state_hookup));
238 sd_global->task_number = 0;
240 surf_init(argc, argv);
241 sd_cfg_init(argc, argv);
245 * \brief Reinits the application part of the simulation (experimental feature)
247 * This function allows you to run several simulations on the same platform
248 * by resetting the part describing the application.
250 * @warning: this function is still experimental and not perfect. For example,
251 * the simulation clock (and traces usage) is not reset. So, do not use it if
252 * you use traces in your simulation, and do not use absolute timing after using it.
253 * That being said, this function is still precious if you want to compare a bunch of
254 * heuristics on the same platforms.
256 void SD_application_reinit(void)
261 if (SD_INITIALISED()) {
262 DEBUG0("Recreating the swags...");
263 xbt_swag_free(sd_global->not_scheduled_task_set);
264 xbt_swag_free(sd_global->scheduled_task_set);
265 xbt_swag_free(sd_global->ready_task_set);
266 xbt_swag_free(sd_global->in_fifo_task_set);
267 xbt_swag_free(sd_global->running_task_set);
268 xbt_swag_free(sd_global->done_task_set);
269 xbt_swag_free(sd_global->failed_task_set);
271 sd_global->not_scheduled_task_set =
272 xbt_swag_new(xbt_swag_offset(task, state_hookup));
273 sd_global->scheduled_task_set =
274 xbt_swag_new(xbt_swag_offset(task, state_hookup));
275 sd_global->ready_task_set =
276 xbt_swag_new(xbt_swag_offset(task, state_hookup));
277 sd_global->in_fifo_task_set =
278 xbt_swag_new(xbt_swag_offset(task, state_hookup));
279 sd_global->running_task_set =
280 xbt_swag_new(xbt_swag_offset(task, state_hookup));
281 sd_global->done_task_set =
282 xbt_swag_new(xbt_swag_offset(task, state_hookup));
283 sd_global->failed_task_set =
284 xbt_swag_new(xbt_swag_offset(task, state_hookup));
285 sd_global->task_number = 0;
287 WARN0("SD_application_reinit called before initialization of SimDag");
288 /* we cannot use exceptions here because xbt is not running! */
294 * \brief Creates the environment
296 * The environment (i.e. the \ref SD_workstation_management "workstations" and the
297 * \ref SD_link_management "links") is created with the data stored in the given XML
300 * \param platform_file name of an XML file describing the environment to create
301 * \see SD_workstation_management, SD_link_management
303 * The XML file follows this DTD:
305 * \include simgrid.dtd
307 * Here is a small example of such a platform:
309 * \include small_platform.xml
311 void SD_create_environment(const char *platform_file)
313 xbt_dict_cursor_t cursor = NULL;
315 void *surf_workstation = NULL;
316 void *surf_link = NULL;
317 char *workstation_model_name;
318 int workstation_id = -1;
320 SD_CHECK_INIT_DONE();
322 DEBUG0("SD_create_environment");
325 surf_timer_model_init(platform_file);
327 workstation_model_name =
328 xbt_cfg_get_string(_sd_cfg_set, "workstation_model");
330 DEBUG1("Model : %s", workstation_model_name);
332 find_model_description(surf_workstation_model_description,
333 workstation_model_name);
334 if (!strcmp(workstation_model_name, "compound")) {
336 char *network_model_name = NULL;
337 char *cpu_model_name = NULL;
342 cpu_model_name = xbt_cfg_get_string(_sd_cfg_set, "cpu_model");
344 if (e.category == bound_error) {
346 "Set a cpu model to use with the 'compound' workstation model");
354 network_model_name = xbt_cfg_get_string(_sd_cfg_set, "network_model");
357 if (e.category == bound_error) {
359 "Set a network model to use with the 'compound' workstation model");
367 find_model_description(surf_network_model_description,
370 find_model_description(surf_cpu_model_description, cpu_model_name);
372 surf_cpu_model_description[cpu_id].model_init(platform_file);
373 surf_network_model_description[network_id].model_init(platform_file);
376 DEBUG0("Call workstation_model_init");
377 surf_workstation_model_description[workstation_id].model_init
380 parse_platform_file(platform_file);
384 /* now let's create the SD wrappers for workstations and links */
385 xbt_dict_foreach(workstation_set, cursor, name, surf_workstation) {
386 __SD_workstation_create(surf_workstation, NULL);
389 xbt_dict_foreach(link_set, cursor, name, surf_link) {
390 __SD_link_create(surf_link, NULL);
393 DEBUG2("Workstation number: %d, link number: %d",
394 SD_workstation_get_number(), SD_link_get_number());
398 * \brief Launches the simulation.
400 * The function will execute the \ref SD_READY ready tasks.
401 * The simulation will be stopped when its time reaches \a how_long,
402 * when a watch point is reached, or when no more task can be executed.
403 * Then you can call SD_simulate() again.
405 * \param how_long maximum duration of the simulation (a negative value means no time limit)
406 * \return a NULL-terminated array of \ref SD_task_t whose state has changed.
407 * \see SD_task_schedule(), SD_task_watch()
409 SD_task_t *SD_simulate(double how_long)
411 double total_time = 0.0; /* we stop the simulation when total_time >= how_long */
412 double elapsed_time = 0.0;
413 SD_task_t task, task_safe, dst;
414 SD_dependency_t dependency;
415 surf_action_t action;
416 SD_task_t *res = NULL;
417 xbt_dynar_t changed_tasks = xbt_dynar_new(sizeof(SD_task_t), NULL);
419 static int first_time = 1;
421 SD_CHECK_INIT_DONE();
423 INFO0("Starting simulation...");
426 surf_presolve(); /* Takes traces into account */
431 surf_timer_model->extension_public->set(surf_get_clock() + how_long,
434 sd_global->watch_point_reached = 0;
436 /* explore the ready tasks */
437 xbt_swag_foreach_safe(task, task_safe, sd_global->ready_task_set) {
438 INFO1("Executing task '%s'", SD_task_get_name(task));
439 if (__SD_task_try_to_run(task) && !xbt_dynar_member(changed_tasks, &task))
440 xbt_dynar_push(changed_tasks, &task);
445 while (elapsed_time >= 0.0 &&
446 (how_long < 0.0 || total_time < how_long) &&
447 !sd_global->watch_point_reached) {
448 surf_model_t model = NULL;
454 DEBUG1("Total time: %f", total_time);
456 elapsed_time = surf_solve();
457 DEBUG1("surf_solve() returns %f", elapsed_time);
458 if (elapsed_time > 0.0)
459 total_time += elapsed_time;
461 /* let's see which tasks are done */
462 xbt_dynar_foreach(model_list, iter, model) {
464 xbt_swag_extract(model->common_public->states.
467 INFO1("Task '%s' done", SD_task_get_name(task));
468 DEBUG0("Calling __SD_task_just_done");
469 __SD_task_just_done(task);
470 DEBUG1("__SD_task_just_done called on task '%s'",
471 SD_task_get_name(task));
473 /* the state has changed */
474 if (!xbt_dynar_member(changed_tasks, &task))
475 xbt_dynar_push(changed_tasks, &task);
477 /* remove the dependencies after this task */
478 while (xbt_dynar_length(task->tasks_after) > 0) {
479 xbt_dynar_get_cpy(task->tasks_after, 0, &dependency);
480 dst = dependency->dst;
481 SD_task_dependency_remove(task, dst);
483 /* is dst ready now? */
484 if (__SD_task_is_ready(dst) && !sd_global->watch_point_reached) {
485 INFO1("Executing task '%s'", SD_task_get_name(dst));
486 if (__SD_task_try_to_run(dst) &&
487 !xbt_dynar_member(changed_tasks, &task))
488 xbt_dynar_push(changed_tasks, &task);
493 /* let's see which tasks have just failed */
495 xbt_swag_extract(model->common_public->states.
496 failed_action_set))) {
498 INFO1("Task '%s' failed", SD_task_get_name(task));
499 __SD_task_set_state(task, SD_FAILED);
500 surf_workstation_model->common_public->action_free(action);
501 task->surf_action = NULL;
503 if (!xbt_dynar_member(changed_tasks, &task))
504 xbt_dynar_push(changed_tasks, &task);
508 while (surf_timer_model->extension_public->get(&fun, (void *) &arg)) {
512 res = xbt_new0(SD_task_t, (xbt_dynar_length(changed_tasks) + 1));
514 xbt_dynar_foreach(changed_tasks, iter, task) {
517 xbt_dynar_free(&changed_tasks);
519 INFO0("Simulation finished");
520 DEBUG3("elapsed_time = %f, total_time = %f, watch_point_reached = %d",
521 elapsed_time, total_time, sd_global->watch_point_reached);
522 DEBUG1("current time = %f", surf_get_clock());
528 * \brief Returns the current clock
530 * \return the current clock, in second
532 double SD_get_clock(void)
534 SD_CHECK_INIT_DONE();
536 return surf_get_clock();
540 * \brief Destroys all SD internal data
542 * This function should be called when the simulation is over. Don't forget also to destroy
545 * \see SD_init(), SD_task_destroy()
549 if (SD_INITIALISED()) {
550 DEBUG0("Destroying workstation and link dictionaries...");
551 xbt_dict_free(&sd_global->workstations);
552 xbt_dict_free(&sd_global->links);
554 DEBUG0("Destroying workstation and link arrays if necessary...");
555 if (sd_global->workstation_list != NULL)
556 xbt_free(sd_global->workstation_list);
558 if (sd_global->link_list != NULL)
559 xbt_free(sd_global->link_list);
561 if (sd_global->recyclable_route != NULL)
562 xbt_free(sd_global->recyclable_route);
564 DEBUG0("Destroying the swags...");
565 xbt_swag_free(sd_global->not_scheduled_task_set);
566 xbt_swag_free(sd_global->scheduled_task_set);
567 xbt_swag_free(sd_global->ready_task_set);
568 xbt_swag_free(sd_global->in_fifo_task_set);
569 xbt_swag_free(sd_global->running_task_set);
570 xbt_swag_free(sd_global->done_task_set);
571 xbt_swag_free(sd_global->failed_task_set);
576 DEBUG0("Exiting Surf...");
579 WARN0("SD_exit() called, but SimDag is not running");
580 /* we cannot use exceptions here because xbt is not running! */