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[simgrid.git] / src / simix / smx_global.c
1 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
2  * All rights reserved.                                                     */
3
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. */
6
7 #include "private.h"
8 #include "xbt/heap.h"
9 #include "xbt/sysdep.h"
10 #include "xbt/log.h"
11 #include "xbt/str.h"
12 #include "xbt/ex.h"             /* ex_backtrace_display */
13 #include "mc/mc.h"
14
15 XBT_LOG_EXTERNAL_CATEGORY(simix);
16 XBT_LOG_EXTERNAL_CATEGORY(simix_action);
17 XBT_LOG_EXTERNAL_CATEGORY(simix_deployment);
18 XBT_LOG_EXTERNAL_CATEGORY(simix_environment);
19 XBT_LOG_EXTERNAL_CATEGORY(simix_host);
20 XBT_LOG_EXTERNAL_CATEGORY(simix_process);
21 XBT_LOG_EXTERNAL_CATEGORY(simix_synchro);
22 XBT_LOG_EXTERNAL_CATEGORY(simix_context);
23 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
24                                 "Logging specific to SIMIX (kernel)");
25
26 smx_global_t simix_global = NULL;
27 static xbt_heap_t simix_timers = NULL;
28
29 static void* SIMIX_action_mallocator_new_f(void);
30 static void SIMIX_action_mallocator_free_f(void* action);
31 static void SIMIX_action_mallocator_reset_f(void* action);
32
33 extern void smx_ctx_raw_new_sr(void);
34
35 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
36 #include <signal.h>
37
38 static void _XBT_CALL inthandler(int ignored)
39 {
40   XBT_INFO("CTRL-C pressed. Displaying status and bailing out");
41   SIMIX_display_process_status();
42   exit(1);
43 }
44
45 /********************************* SIMIX **************************************/
46
47 XBT_INLINE double SIMIX_timer_next(void)
48 {
49   return xbt_heap_size(simix_timers) > 0 ? xbt_heap_maxkey(simix_timers) : -1.0;
50 }
51
52 /**
53  * \brief Initialize SIMIX internal data.
54  *
55  * \param argc Argc
56  * \param argv Argv
57  */
58 void SIMIX_global_init(int *argc, char **argv)
59 {
60   s_smx_process_t proc;
61
62   if (!simix_global) {
63     /* Connect our log channels: that must be done manually under windows */
64     XBT_LOG_CONNECT(simix_action, simix);
65     XBT_LOG_CONNECT(simix_deployment, simix);
66     XBT_LOG_CONNECT(simix_environment, simix);
67     XBT_LOG_CONNECT(simix_host, simix);
68     XBT_LOG_CONNECT(simix_kernel, simix);
69     XBT_LOG_CONNECT(simix_process, simix);
70     XBT_LOG_CONNECT(simix_synchro, simix);
71     XBT_LOG_CONNECT(simix_context, simix);
72
73     simix_global = xbt_new0(s_smx_global_t, 1);
74
75     simix_global->process_to_run = xbt_dynar_new(sizeof(void *), NULL);
76     simix_global->process_list =
77         xbt_swag_new(xbt_swag_offset(proc, process_hookup));
78     simix_global->process_to_destroy =
79         xbt_swag_new(xbt_swag_offset(proc, destroy_hookup));
80
81     simix_global->maestro_process = NULL;
82     simix_global->registered_functions = xbt_dict_new();
83
84     simix_global->create_process_function = SIMIX_process_create;
85     simix_global->kill_process_function = SIMIX_process_kill;
86     simix_global->cleanup_process_function = SIMIX_process_cleanup;
87     simix_global->action_mallocator = xbt_mallocator_new(65536,
88         SIMIX_action_mallocator_new_f, SIMIX_action_mallocator_free_f,
89         SIMIX_action_mallocator_reset_f);
90
91     surf_init(argc, argv);      /* Initialize SURF structures */
92     SIMIX_context_mod_init();
93     SIMIX_create_maestro_process();
94
95     /* context exception handlers */
96     __xbt_running_ctx_fetch = SIMIX_process_get_running_context;
97     __xbt_ex_terminate = SIMIX_process_exception_terminate;
98
99     /* Initialize request mechanism */
100     SIMIX_request_init();
101
102     /* Initialize the SIMIX network module */
103     SIMIX_network_init();
104
105     /* Prepare to display some more info when dying on Ctrl-C pressing */
106     signal(SIGINT, inthandler);
107   }
108   if (!simix_timers) {
109     simix_timers = xbt_heap_new(8, &free);
110   }
111
112   XBT_DEBUG("ADD SIMIX LEVELS");
113   SIMIX_HOST_LEVEL = xbt_lib_add_level(host_lib,SIMIX_host_destroy);
114 }
115
116 /**
117  * \brief Clean the SIMIX simulation
118  *
119  * This functions remove the memory used by SIMIX
120  */
121 void SIMIX_clean(void)
122 {
123 #ifdef TIME_BENCH
124   smx_ctx_raw_new_sr();
125 #endif
126
127   /* Kill everyone (except maestro) */
128   SIMIX_process_killall(simix_global->maestro_process);
129
130   /* Exit the SIMIX network module */
131   SIMIX_network_exit();
132
133   /* Exit request mechanism */
134   SIMIX_request_destroy();
135
136   xbt_heap_free(simix_timers);
137   /* Free the remaining data structures */
138   xbt_dynar_free(&simix_global->process_to_run);
139   xbt_swag_free(simix_global->process_to_destroy);
140   xbt_swag_free(simix_global->process_list);
141   simix_global->process_list = NULL;
142   simix_global->process_to_destroy = NULL;
143   xbt_dict_free(&(simix_global->registered_functions));
144
145   /* Let's free maestro now */
146   SIMIX_context_free(simix_global->maestro_process->context);
147   xbt_free(simix_global->maestro_process->running_ctx);
148   xbt_free(simix_global->maestro_process);
149   simix_global->maestro_process = NULL;
150
151   /* Restore the default exception setup */
152   __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
153   __xbt_ex_terminate = &__xbt_ex_terminate_default;
154
155   /* Finish context module and SURF */
156   SIMIX_context_mod_exit();
157
158   surf_exit();
159
160   xbt_mallocator_free(simix_global->action_mallocator);
161   xbt_free(simix_global);
162   simix_global = NULL;
163
164   return;
165 }
166
167
168 /**
169  * \brief A clock (in second).
170  *
171  * \return Return the clock.
172  */
173 XBT_INLINE double SIMIX_get_clock(void)
174 {
175   if(MC_IS_ENABLED){
176     return MC_process_clock_get(SIMIX_process_self());
177   }else{
178     return surf_get_clock();
179   }
180 }
181
182 void SIMIX_run(void)
183 {
184   double time = 0;
185   smx_req_t req;
186   xbt_swag_t set;
187   surf_action_t action;
188   smx_timer_t timer;
189   surf_model_t model;
190   unsigned int iter;
191
192   do {
193     XBT_DEBUG("New Schedule Round; size(queue)=%lu",
194         xbt_dynar_length(simix_global->process_to_run));
195 #ifdef TIME_BENCH
196     smx_ctx_raw_new_sr();
197 #endif
198     do {
199       XBT_DEBUG("New Sub-Schedule Round; size(queue)=%lu",
200               xbt_dynar_length(simix_global->process_to_run));
201       SIMIX_context_runall(simix_global->process_to_run);
202       while ((req = SIMIX_request_pop())) {
203         XBT_DEBUG("Handling request %p", req);
204         SIMIX_request_pre(req, 0);
205       }
206     } while (xbt_dynar_length(simix_global->process_to_run));
207
208     time = surf_solve(SIMIX_timer_next());
209
210     /* Notify all the hosts that have failed */
211     /* FIXME: iterate through the list of failed host and mark each of them */
212     /* as failed. On each host, signal all the running processes with host_fail */
213
214     /* Handle any pending timer */
215     while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
216        //FIXME: make the timers being real callbacks
217        // (i.e. provide dispatchers that read and expand the args) 
218        timer = xbt_heap_pop(simix_timers);
219        if (timer->func)
220          ((void (*)(void*))timer->func)(timer->args);
221     }
222     /* Wake up all process waiting for the action finish */
223     xbt_dynar_foreach(model_list, iter, model) {
224       for (set = model->states.failed_action_set;
225            set;
226            set = (set == model->states.failed_action_set)
227                  ? model->states.done_action_set
228                  : NULL) {
229         while ((action = xbt_swag_extract(set)))
230           SIMIX_request_post((smx_action_t) action->data);
231       }
232     }
233   } while (time != -1.0);
234
235   if (xbt_swag_size(simix_global->process_list) != 0) {
236
237     XBT_WARN("Oops ! Deadlock or code not perfectly clean.");
238     SIMIX_display_process_status();
239     xbt_abort();
240   }
241 }
242
243 /**
244  *      \brief Set the date to execute a function
245  *
246  * Set the date to execute the function on the surf.
247  *      \param date Date to execute function
248  *      \param function Function to be executed
249  *      \param arg Parameters of the function
250  *
251  */
252 XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
253 {
254   smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
255
256   timer->date = date;
257   timer->func = function;
258   timer->args = arg;
259   xbt_heap_push(simix_timers, timer, date);
260 }
261
262 /**
263  * \brief Registers a function to create a process.
264  *
265  * This function registers a function to be called
266  * when a new process is created. The function has
267  * to call SIMIX_process_create().
268  * \param function create process function
269  */
270 XBT_INLINE void SIMIX_function_register_process_create(smx_creation_func_t
271                                                        function)
272 {
273   simix_global->create_process_function = function;
274 }
275
276 /**
277  * \brief Registers a function to kill a process.
278  *
279  * This function registers a function to be called when a
280  * process is killed. The function has to call the SIMIX_process_kill().
281  *
282  * \param function Kill process function
283  */
284 XBT_INLINE void SIMIX_function_register_process_kill(void_pfn_smxprocess_t
285                                                      function)
286 {
287   simix_global->kill_process_function = function;
288 }
289
290 /**
291  * \brief Registers a function to cleanup a process.
292  *
293  * This function registers a user function to be called when
294  * a process ends properly.
295  *
296  * \param function cleanup process function
297  */
298 XBT_INLINE void SIMIX_function_register_process_cleanup(void_pfn_smxprocess_t
299                                                         function)
300 {
301   simix_global->cleanup_process_function = function;
302 }
303
304
305 void SIMIX_display_process_status(void)
306 {
307   if (simix_global->process_list == NULL) {
308     return;
309   }
310
311   smx_process_t process = NULL;
312   int nbprocess = xbt_swag_size(simix_global->process_list);
313
314   XBT_INFO("%d processes are still running, waiting for something.", nbprocess);
315   /*  List the process and their state */
316   XBT_INFO
317     ("Legend of the following listing: \"<process> on <host>: <status>.\"");
318   xbt_swag_foreach(process, simix_global->process_list) {
319
320     if (process->waiting_action) {
321
322       const char* action_description = "unknown";
323       switch (process->waiting_action->type) {
324
325         case SIMIX_ACTION_EXECUTE:
326           action_description = "execution";
327           break;
328
329         case SIMIX_ACTION_PARALLEL_EXECUTE:
330           action_description = "parallel execution";
331           break;
332
333         case SIMIX_ACTION_COMMUNICATE:
334           action_description = "communication";
335           break;
336
337         case SIMIX_ACTION_SLEEP:
338           action_description = "sleeping";
339           break;
340
341         case SIMIX_ACTION_SYNCHRO:
342           action_description = "synchronization";
343           break;
344
345         case SIMIX_ACTION_IO:
346           action_description = "I/O";
347           break;
348       }
349       XBT_INFO("Waiting for %s action %p to finish", action_description, process->waiting_action);
350     }
351   }
352 }
353
354 static void* SIMIX_action_mallocator_new_f(void) {
355   smx_action_t action = xbt_new(s_smx_action_t, 1);
356   action->request_list = xbt_fifo_new();
357   return action;
358 }
359
360 static void SIMIX_action_mallocator_free_f(void* action) {
361   xbt_fifo_free(((smx_action_t) action)->request_list);
362   xbt_free(action);
363 }
364
365 static void SIMIX_action_mallocator_reset_f(void* action) {
366
367   // we also recycle the request list
368   xbt_fifo_t fifo = ((smx_action_t) action)->request_list;
369   xbt_fifo_reset(fifo);
370   memset(action, 0, sizeof(s_smx_action_t));
371   ((smx_action_t) action)->request_list = fifo;
372 }