1 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "xbt/sysdep.h"
12 #include "xbt/ex.h" /* ex_backtrace_display */
14 XBT_LOG_EXTERNAL_CATEGORY(simix);
15 XBT_LOG_EXTERNAL_CATEGORY(simix_action);
16 XBT_LOG_EXTERNAL_CATEGORY(simix_deployment);
17 XBT_LOG_EXTERNAL_CATEGORY(simix_environment);
18 XBT_LOG_EXTERNAL_CATEGORY(simix_host);
19 XBT_LOG_EXTERNAL_CATEGORY(simix_process);
20 XBT_LOG_EXTERNAL_CATEGORY(simix_synchro);
21 XBT_LOG_EXTERNAL_CATEGORY(simix_context);
22 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
23 "Logging specific to SIMIX (kernel)");
25 SIMIX_Global_t simix_global = NULL;
26 static xbt_heap_t simix_timers = NULL;
28 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
31 static void _XBT_CALL inthandler(int ignored)
33 INFO0("CTRL-C pressed. Displaying status and bailing out");
34 SIMIX_display_process_status();
38 /********************************* SIMIX **************************************/
41 * \brief Initialize SIMIX internal data.
46 void SIMIX_global_init(int *argc, char **argv)
51 /* Connect our log channels: that must be done manually under windows */
52 XBT_LOG_CONNECT(simix_action, simix);
53 XBT_LOG_CONNECT(simix_deployment, simix);
54 XBT_LOG_CONNECT(simix_environment, simix);
55 XBT_LOG_CONNECT(simix_host, simix);
56 XBT_LOG_CONNECT(simix_kernel, simix);
57 XBT_LOG_CONNECT(simix_process, simix);
58 XBT_LOG_CONNECT(simix_synchro, simix);
59 XBT_LOG_CONNECT(simix_context, simix);
61 simix_global = xbt_new0(s_SIMIX_Global_t, 1);
63 simix_global->host = xbt_dict_new();
64 simix_global->process_to_run =
65 xbt_swag_new(xbt_swag_offset(proc, synchro_hookup));
66 simix_global->process_list =
67 xbt_swag_new(xbt_swag_offset(proc, process_hookup));
68 simix_global->process_to_destroy =
69 xbt_swag_new(xbt_swag_offset(proc, destroy_hookup));
71 simix_global->current_process = NULL;
72 simix_global->maestro_process = NULL;
73 simix_global->registered_functions = xbt_dict_new();
75 simix_global->create_process_function = NULL;
76 simix_global->kill_process_function = NULL;
77 simix_global->cleanup_process_function = SIMIX_process_cleanup;
79 #ifdef HAVE_LATENCY_BOUND_TRACKING
80 simix_global->latency_limited_dict = xbt_dict_new();
83 SIMIX_context_mod_init();
84 SIMIX_create_maestro_process();
86 /* context exception handlers */
87 __xbt_running_ctx_fetch = SIMIX_process_get_running_context;
88 __xbt_ex_terminate = SIMIX_process_exception_terminate;
90 /* Initialize request mechanism */
93 /* Initialize the SIMIX network module */
96 /* Prepare to display some more info when dying on Ctrl-C pressing */
97 signal(SIGINT, inthandler);
98 surf_init(argc, argv); /* Initialize SURF structures */
101 simix_timers = xbt_heap_new(8, &free);
106 * \brief Clean the SIMIX simulation
108 * This functions remove the memory used by SIMIX
110 void SIMIX_clean(void)
112 /* Kill everyone (except maestro) */
113 SIMIX_process_killall();
115 /* Exit the SIMIX network module */
116 SIMIX_network_exit();
118 /* Exit request mechanism */
119 SIMIX_request_destroy();
121 xbt_heap_free(simix_timers);
122 /* Free the remaining data structures */
123 xbt_swag_free(simix_global->process_to_run);
124 xbt_swag_free(simix_global->process_to_destroy);
125 xbt_swag_free(simix_global->process_list);
126 simix_global->process_list = NULL;
127 simix_global->process_to_destroy = NULL;
128 xbt_dict_free(&(simix_global->registered_functions));
129 xbt_dict_free(&(simix_global->host));
131 #ifdef HAVE_LATENCY_BOUND_TRACKING
132 xbt_dict_free(&(simix_global->latency_limited_dict));
135 /* Let's free maestro now */
136 SIMIX_context_free(simix_global->maestro_process->context);
137 xbt_free(simix_global->maestro_process->running_ctx);
138 xbt_free(simix_global->maestro_process);
139 simix_global->maestro_process = NULL;
141 /* Restore the default exception setup */
142 __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
143 __xbt_ex_terminate = &__xbt_ex_terminate_default;
145 /* Finish context module and SURF */
146 SIMIX_context_mod_exit();
150 xbt_free(simix_global);
158 * \brief A clock (in second).
160 * \return Return the clock.
162 XBT_INLINE double SIMIX_get_clock(void)
164 return surf_get_clock();
172 surf_action_t action;
179 DEBUG0("New Schedule Round");
180 SIMIX_context_runall(simix_global->process_to_run);
181 while((req = SIMIX_request_pop())){
182 DEBUG1("Handling request %p", req);
183 SIMIX_request_pre(req);
185 } while (xbt_swag_size(simix_global->process_to_run));
187 time = surf_solve(SIMIX_timer_next());
189 /* Notify all the hosts that have failed */
190 /* FIXME: iterate through the list of failed host and mark each of them */
191 /* as failed. On each host, signal all the running processes with host_fail */
193 /* Handle any pending timer */
194 while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
195 //FIXME: make the timers being real callbacks
196 // (i.e. provide dispatchers that read and expand the args)
197 timer = xbt_heap_pop(simix_timers);
199 ((void (*)(void*))timer->func)(timer->args);
201 /* Wake up all process waiting for the action finish */
202 xbt_dynar_foreach(model_list, iter, model) {
203 for(set = model->states.failed_action_set;
205 set = (set == model->states.failed_action_set)
206 ? model->states.done_action_set
208 while ((action = xbt_swag_extract(set)))
209 SIMIX_request_post((smx_action_t)action->data);
212 } while(time != -1.0);
218 * \brief Does a turn of the simulation
220 * Executes a step in the surf simulation, adding to the two lists all the actions that finished on this turn. Schedules all processus in the process_to_run list.
221 * \param actions_done List of actions done
222 * \param actions_failed List of actions failed
223 * \return The time spent to execute the simulation or -1 if the simulation ended
225 /* FIXME: this function is now deprecated, remove it */
227 double SIMIX_solve(xbt_fifo_t actions_done, xbt_fifo_t actions_failed)
230 smx_process_t process = NULL;
232 double elapsed_time = 0.0;
233 static int state_modifications = 1;
234 int actions_on_system = 0;
237 SIMIX_process_empty_trash();
238 if (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug) &&
239 xbt_swag_size(simix_global->process_to_run) && (elapsed_time > 0)) {
240 DEBUG0("**************************************************");
243 while ((process = xbt_swag_extract(simix_global->process_to_run))) {
244 DEBUG2("Scheduling %s on %s", process->name, process->smx_host->name);
245 /*SIMIX_process_schedule(process);*/
249 surf_action_t action = NULL;
250 surf_model_t model = NULL;
251 smx_action_t smx_action = NULL;
256 xbt_dynar_foreach(model_list, iter, model) {
257 if (xbt_swag_size(model->states.failed_action_set)
258 || xbt_swag_size(model->states.done_action_set)) {
259 state_modifications = 1;
262 if (xbt_swag_size(model->states.running_action_set)
263 || xbt_swag_size(model->states.ready_action_set)) {
264 actions_on_system = 1;
267 if (xbt_heap_size(simix_timers) > 0) {
268 actions_on_system = 1;
271 /* only calls surf_solve if there are actions to run */
272 if (!state_modifications && actions_on_system) {
273 DEBUG1("Calling surf_solve(%f)", SIMIX_timer_next());
274 elapsed_time = surf_solve(SIMIX_timer_next());
275 DEBUG1("Elapsed time %f", elapsed_time);
278 actions_on_system = 0;
279 while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
280 timer = xbt_heap_pop(simix_timers);
284 /* change in process, don't quit */
285 actions_on_system = 1;
286 DEBUG3("got %p %p at %f", fun, arg, timer->date);
287 if (fun == SIMIX_process_create) {
288 smx_process_arg_t args = arg;
289 DEBUG2("Launching %s on %s", args->name, args->hostname);
290 process = SIMIX_process_create(args->name, args->code,
291 args->data, args->hostname,
292 args->argc, args->argv,
294 /* verify if process has been created */
300 if (args->kill_time > SIMIX_get_clock()) {
301 SIMIX_timer_set(args->kill_time, &SIMIX_process_kill, process);
304 } else if (fun == simix_global->create_process_function) {
305 smx_process_arg_t args = arg;
306 DEBUG2("Launching %s on %s", args->name, args->hostname);
308 (*simix_global->create_process_function) (args->name,
315 /* verify if process has been created */
320 if (args->kill_time > SIMIX_get_clock()) {
321 if (simix_global->kill_process_function)
322 SIMIX_timer_set(args->kill_time, simix_global->kill_process_function, process);
324 SIMIX_timer_set(args->kill_time, &SIMIX_process_kill, process);
327 } else if (fun == SIMIX_process_kill) {
329 DEBUG2("Killing %s on %s", process->name, process->smx_host->name);
330 SIMIX_process_kill(process, SIMIX_process_self());
331 } else if (fun == simix_global->kill_process_function) {
333 (*simix_global->kill_process_function) (process);
335 //FIXME: ((void (*)(void*))fun)(arg);
340 /* Wake up all process waiting for the action finish */
341 xbt_dynar_foreach(model_list, iter, model) {
342 /* stop simulation case there are no actions to run */
343 if ((xbt_swag_size(model->states.running_action_set)) ||
344 (xbt_swag_size(model->states.ready_action_set)) ||
345 (xbt_swag_size(model->states.done_action_set)) ||
346 (xbt_swag_size(model->states.failed_action_set)))
347 actions_on_system = 1;
349 while ((action = xbt_swag_extract(model->states.failed_action_set))) {
350 smx_action = action->data;
352 // SIMIX_action_signal_all(smx_action);
355 while ((action = xbt_swag_extract(model->states.done_action_set))) {
356 smx_action = action->data;
358 // SIMIX_action_signal_all(smx_action);
364 if (xbt_heap_size(simix_timers) > 0) {
365 actions_on_system = 1;
368 state_modifications = 0;
369 if (!actions_on_system)
372 if (elapsed_time == -1) {
373 if (xbt_swag_size(simix_global->process_list) == 0) {
374 /* INFO0("Congratulations ! Simulation terminated : all processes are over"); */
376 INFO0("Oops ! Deadlock or code not perfectly clean.");
377 SIMIX_display_process_status();
378 if (XBT_LOG_ISENABLED(simix, xbt_log_priority_debug) ||
379 XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug)) {
383 INFO0("Return a Warning.");
387 DEBUG1("SIMIX_solve() finished, elapsed_time = %f", elapsed_time);
393 * \brief Set the date to execute a function
395 * Set the date to execute the function on the surf.
396 * \param date Date to execute function
397 * \param function Function to be executed
398 * \param arg Parameters of the function
401 XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
403 smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
406 timer->func = function;
408 xbt_heap_push(simix_timers, timer, date);
411 XBT_INLINE double SIMIX_timer_next(void)
413 return xbt_heap_size(simix_timers) > 0 ? xbt_heap_maxkey(simix_timers) : -1.0;
417 * \brief Registers a function to create a process.
419 * This function registers an user function to be called when a new process is created. The user function have to call the SIMIX_create_process function.
420 * \param function Create process function
423 XBT_INLINE void SIMIX_function_register_process_create(smx_creation_func_t
426 xbt_assert0((simix_global->create_process_function == NULL),
429 simix_global->create_process_function = function;
433 * \brief Registers a function to kill a process.
435 * This function registers an user function to be called when a new process is killed. The user function have to call the SIMIX_kill_process function.
436 * \param function Kill process function
439 XBT_INLINE void SIMIX_function_register_process_kill(void_f_pvoid_t
442 xbt_assert0((simix_global->kill_process_function == NULL),
445 simix_global->kill_process_function = function;
449 * \brief Registers a function to cleanup a process.
451 * This function registers an user function to be called when a new process ends properly.
452 * \param function cleanup process function
455 XBT_INLINE void SIMIX_function_register_process_cleanup(void_pfn_smxprocess_t
458 simix_global->cleanup_process_function = function;
462 void SIMIX_display_process_status(void)
464 if (simix_global->process_list == NULL) {
468 smx_process_t process = NULL;
469 /*xbt_fifo_item_t item = NULL;
471 int nbprocess = xbt_swag_size(simix_global->process_list);
473 INFO1("%d processes are still running, waiting for something.", nbprocess);
474 /* List the process and their state */
476 ("Legend of the following listing: \"<process> on <host>: <status>.\"");
477 xbt_swag_foreach(process, simix_global->process_list) {
480 asprintf(&who, "%s on %s: %s",
482 process->smx_host->name,
483 (process->blocked) ? "[BLOCKED] "
484 : ((process->suspended) ? "[SUSPENDED] " : ""));
486 if (process->waiting_action) {
487 who2 = bprintf("Waiting for action %p to finish", process->waiting_action);
491 if (process->mutex) {
493 bprintf("%s Blocked on mutex %p", who,
494 (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_verbose)) ?
495 process->mutex : (void *) 0xdead);
498 } else if (process->cond) {
501 ("%s Blocked on condition %p; Waiting for the following actions:",
503 (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_verbose)) ?
504 process->cond : (void *) 0xdead);
507 xbt_fifo_foreach(process->cond->actions, item, act, smx_action_t) {
509 bprintf("%s '%s'(%p)", who, act->name,
510 (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_verbose))
511 ? act : (void *) 0xdead);
515 } else if (process->sem) {
518 ("%s Blocked on semaphore %p; Waiting for the following actions:",
520 (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_verbose)) ?
521 process->sem : (void *) 0xdead);
524 xbt_fifo_foreach(process->sem->actions, item, act, smx_action_t) {
526 bprintf("%s '%s'(%p)", who, act->name,
527 (XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_verbose))
528 ? act : (void *) 0xdead);
536 ("%s Blocked in an unknown status (please report this bug)", who);