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. */
7 #include "smx_private.h"
9 #include "xbt/sysdep.h"
12 #include "xbt/ex.h" /* ex_backtrace_display */
15 XBT_LOG_NEW_CATEGORY(simix, "All SIMIX categories");
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
17 "Logging specific to SIMIX (kernel)");
19 smx_global_t simix_global = NULL;
20 static xbt_heap_t simix_timers = NULL;
22 static void* SIMIX_action_mallocator_new_f(void);
23 static void SIMIX_action_mallocator_free_f(void* action);
24 static void SIMIX_action_mallocator_reset_f(void* action);
26 extern void smx_ctx_raw_new_sr(void);
28 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
31 int _surf_do_verbose_exit = 1;
32 static void _XBT_CALL inthandler(int ignored)
34 if ( _surf_do_verbose_exit ) {
35 XBT_INFO("CTRL-C pressed. Displaying status and bailing out");
36 SIMIX_display_process_status();
39 XBT_INFO("CTRL-C pressed. bailing out without displaying because verbose-exit is disabled");
44 /********************************* SIMIX **************************************/
46 XBT_INLINE double SIMIX_timer_next(void)
48 return xbt_heap_size(simix_timers) > 0 ? xbt_heap_maxkey(simix_timers) : -1.0;
52 * \brief Initialize SIMIX internal data.
57 void SIMIX_global_init(int *argc, char **argv)
62 simix_global = xbt_new0(s_smx_global_t, 1);
64 simix_global->process_to_run = xbt_dynar_new(sizeof(smx_process_t), NULL);
65 simix_global->process_that_ran = xbt_dynar_new(sizeof(smx_process_t), NULL);
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->maestro_process = NULL;
72 simix_global->registered_functions = xbt_dict_new_homogeneous(NULL);
74 simix_global->create_process_function = SIMIX_process_create;
75 simix_global->kill_process_function = SIMIX_process_kill;
76 simix_global->cleanup_process_function = SIMIX_process_cleanup;
77 simix_global->action_mallocator = xbt_mallocator_new(65536,
78 SIMIX_action_mallocator_new_f, SIMIX_action_mallocator_free_f,
79 SIMIX_action_mallocator_reset_f);
81 surf_init(argc, argv); /* Initialize SURF structures */
82 SIMIX_context_mod_init();
83 SIMIX_create_maestro_process();
85 /* context exception handlers */
86 __xbt_running_ctx_fetch = SIMIX_process_get_running_context;
87 __xbt_ex_terminate = SIMIX_process_exception_terminate;
89 /* Initialize the SIMIX network module */
92 /* Prepare to display some more info when dying on Ctrl-C pressing */
93 signal(SIGINT, inthandler);
96 simix_timers = xbt_heap_new(8, &free);
99 XBT_DEBUG("ADD SIMIX LEVELS");
100 SIMIX_HOST_LEVEL = xbt_lib_add_level(host_lib,SIMIX_host_destroy);
104 * \brief Clean the SIMIX simulation
106 * This functions remove the memory used by SIMIX
108 void SIMIX_clean(void)
111 smx_ctx_raw_new_sr();
114 /* Kill everyone (except maestro) */
115 SIMIX_process_killall(simix_global->maestro_process);
117 /* Exit the SIMIX network module */
118 SIMIX_network_exit();
120 xbt_heap_free(simix_timers);
122 /* Free the remaining data structures */
123 xbt_dynar_free(&simix_global->process_to_run);
124 xbt_dynar_free(&simix_global->process_that_ran);
125 xbt_swag_free(simix_global->process_to_destroy);
126 xbt_swag_free(simix_global->process_list);
127 simix_global->process_list = NULL;
128 simix_global->process_to_destroy = NULL;
129 xbt_dict_free(&(simix_global->registered_functions));
131 /* Let's free maestro now */
132 SIMIX_context_free(simix_global->maestro_process->context);
133 xbt_free(simix_global->maestro_process->running_ctx);
134 xbt_free(simix_global->maestro_process);
135 simix_global->maestro_process = NULL;
137 /* Restore the default exception setup */
138 __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
139 __xbt_ex_terminate = &__xbt_ex_terminate_default;
141 /* Finish context module and SURF */
142 SIMIX_context_mod_exit();
146 xbt_mallocator_free(simix_global->action_mallocator);
147 xbt_free(simix_global);
155 * \brief A clock (in second).
157 * \return Return the clock.
159 XBT_INLINE double SIMIX_get_clock(void)
162 return MC_process_clock_get(SIMIX_process_self());
164 return surf_get_clock();
168 static int process_syscall_color(void *p) {
169 e_smx_simcall_t s = (*((smx_process_t *)p))->simcall.call;
171 if (s == SIMCALL_NONE || s == SIMCALL_PROCESS_KILL) return 2;
172 else if (s == SIMCALL_PROCESS_RESUME) return 1;
179 smx_process_t process;
181 surf_action_t action;
187 XBT_DEBUG("New Schedule Round; size(queue)=%lu",
188 xbt_dynar_length(simix_global->process_to_run));
190 smx_ctx_raw_new_sr();
192 while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
193 XBT_DEBUG("New Sub-Schedule Round; size(queue)=%lu",
194 xbt_dynar_length(simix_global->process_to_run));
195 SIMIX_process_runall();
196 xbt_dynar_three_way_partition(simix_global->process_that_ran, process_syscall_color);
197 xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
198 if (process->simcall.call != SIMCALL_NONE) {
199 SIMIX_simcall_pre(&process->simcall, 0);
204 time = SIMIX_timer_next();
205 if (time != -1.0 || xbt_swag_size(simix_global->process_list) != 0)
206 time = surf_solve(time);
208 /* Notify all the hosts that have failed */
209 /* FIXME: iterate through the list of failed host and mark each of them */
210 /* as failed. On each host, signal all the running processes with host_fail */
212 /* Handle any pending timer */
213 while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
214 //FIXME: make the timers being real callbacks
215 // (i.e. provide dispatchers that read and expand the args)
216 timer = xbt_heap_pop(simix_timers);
218 ((void (*)(void*))timer->func)(timer->args);
220 /* Wake up all processes waiting for a Surf action to finish */
221 xbt_dynar_foreach(model_list, iter, model) {
222 set = model->states.failed_action_set;
223 while ((action = xbt_swag_extract(set)))
224 SIMIX_simcall_post((smx_action_t) action->data);
225 set = model->states.done_action_set;
226 while ((action = xbt_swag_extract(set)))
227 SIMIX_simcall_post((smx_action_t) action->data);
230 /* Clean processes to destroy */
231 SIMIX_process_empty_trash();
233 } while (time != -1.0 || !xbt_dynar_is_empty(simix_global->process_to_run));
235 if (xbt_swag_size(simix_global->process_list) != 0) {
241 XBT_WARN("Oops ! Deadlock or code not perfectly clean.");
242 SIMIX_display_process_status();
248 * \brief Set the date to execute a function
250 * Set the date to execute the function on the surf.
251 * \param date Date to execute function
252 * \param function Function to be executed
253 * \param arg Parameters of the function
256 XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
258 smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
261 timer->func = function;
263 xbt_heap_push(simix_timers, timer, date);
267 * \brief Registers a function to create a process.
269 * This function registers a function to be called
270 * when a new process is created. The function has
271 * to call SIMIX_process_create().
272 * \param function create process function
274 XBT_INLINE void SIMIX_function_register_process_create(smx_creation_func_t
277 simix_global->create_process_function = function;
281 * \brief Registers a function to kill a process.
283 * This function registers a function to be called when a
284 * process is killed. The function has to call the SIMIX_process_kill().
286 * \param function Kill process function
288 XBT_INLINE void SIMIX_function_register_process_kill(void_pfn_smxprocess_t
291 simix_global->kill_process_function = function;
295 * \brief Registers a function to cleanup a process.
297 * This function registers a user function to be called when
298 * a process ends properly.
300 * \param function cleanup process function
302 XBT_INLINE void SIMIX_function_register_process_cleanup(void_pfn_smxprocess_t
305 simix_global->cleanup_process_function = function;
309 void SIMIX_display_process_status(void)
311 if (simix_global->process_list == NULL) {
315 smx_process_t process = NULL;
316 int nbprocess = xbt_swag_size(simix_global->process_list);
318 XBT_INFO("%d processes are still running, waiting for something.", nbprocess);
319 /* List the process and their state */
321 ("Legend of the following listing: \"Process <pid> (<name>@<host>): <status>\"");
322 xbt_swag_foreach(process, simix_global->process_list) {
324 if (process->waiting_action) {
326 const char* action_description = "unknown";
327 switch (process->waiting_action->type) {
329 case SIMIX_ACTION_EXECUTE:
330 action_description = "execution";
333 case SIMIX_ACTION_PARALLEL_EXECUTE:
334 action_description = "parallel execution";
337 case SIMIX_ACTION_COMMUNICATE:
338 action_description = "communication";
341 case SIMIX_ACTION_SLEEP:
342 action_description = "sleeping";
345 case SIMIX_ACTION_SYNCHRO:
346 action_description = "synchronization";
349 case SIMIX_ACTION_IO:
350 action_description = "I/O";
353 XBT_INFO("Process %lu (%s@%s): waiting for %s action %p (%s) in state %d to finish",
354 process->pid, process->name, process->smx_host->name,
355 action_description, process->waiting_action,
356 process->waiting_action->name, (int)process->waiting_action->state);
359 XBT_INFO("Process %lu (%s@%s)", process->pid, process->name, process->smx_host->name);
364 static void* SIMIX_action_mallocator_new_f(void) {
365 smx_action_t action = xbt_new(s_smx_action_t, 1);
366 action->simcalls = xbt_fifo_new();
370 static void SIMIX_action_mallocator_free_f(void* action) {
371 xbt_fifo_free(((smx_action_t) action)->simcalls);
375 static void SIMIX_action_mallocator_reset_f(void* action) {
377 // we also recycle the simcall list
378 xbt_fifo_t fifo = ((smx_action_t) action)->simcalls;
379 xbt_fifo_reset(fifo);
380 memset(action, 0, sizeof(s_smx_action_t));
381 ((smx_action_t) action)->simcalls = fifo;