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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->host = xbt_dict_new();
76     simix_global->process_to_run = xbt_dynar_new(sizeof(void *), NULL);
77     simix_global->process_list =
78         xbt_swag_new(xbt_swag_offset(proc, process_hookup));
79     simix_global->process_to_destroy =
80         xbt_swag_new(xbt_swag_offset(proc, destroy_hookup));
81
82     simix_global->maestro_process = NULL;
83     simix_global->registered_functions = xbt_dict_new();
84
85     simix_global->create_process_function = SIMIX_process_create;
86     simix_global->kill_process_function = SIMIX_process_kill;
87     simix_global->cleanup_process_function = SIMIX_process_cleanup;
88     simix_global->action_mallocator = xbt_mallocator_new(65536,
89         SIMIX_action_mallocator_new_f, SIMIX_action_mallocator_free_f,
90         SIMIX_action_mallocator_reset_f);
91
92     surf_init(argc, argv);      /* Initialize SURF structures */
93     SIMIX_context_mod_init();
94     SIMIX_create_maestro_process();
95
96     /* context exception handlers */
97     __xbt_running_ctx_fetch = SIMIX_process_get_running_context;
98     __xbt_ex_terminate = SIMIX_process_exception_terminate;
99
100     /* Initialize request mechanism */
101     SIMIX_request_init();
102
103     /* Initialize the SIMIX network module */
104     SIMIX_network_init();
105
106     /* Prepare to display some more info when dying on Ctrl-C pressing */
107     signal(SIGINT, inthandler);
108   }
109   if (!simix_timers) {
110     simix_timers = xbt_heap_new(8, &free);
111   }
112
113   XBT_DEBUG("ADD SIMIX LEVELS");
114   SIMIX_HOST_LEVEL = xbt_lib_add_level(host_lib,free);
115 }
116
117 /**
118  * \brief Clean the SIMIX simulation
119  *
120  * This functions remove the memory used by SIMIX
121  */
122 void SIMIX_clean(void)
123 {
124 #ifdef TIME_BENCH
125   smx_ctx_raw_new_sr();
126 #endif
127
128   /* Kill everyone (except maestro) */
129   SIMIX_process_killall(simix_global->maestro_process);
130
131   /* Exit the SIMIX network module */
132   SIMIX_network_exit();
133
134   /* Exit request mechanism */
135   SIMIX_request_destroy();
136
137   xbt_heap_free(simix_timers);
138   /* Free the remaining data structures */
139   xbt_dynar_free(&simix_global->process_to_run);
140   xbt_swag_free(simix_global->process_to_destroy);
141   xbt_swag_free(simix_global->process_list);
142   simix_global->process_list = NULL;
143   simix_global->process_to_destroy = NULL;
144   xbt_dict_free(&(simix_global->registered_functions));
145   xbt_dict_free(&(simix_global->host));
146
147   /* Let's free maestro now */
148   SIMIX_context_free(simix_global->maestro_process->context);
149   xbt_free(simix_global->maestro_process->running_ctx);
150   xbt_free(simix_global->maestro_process);
151   simix_global->maestro_process = NULL;
152
153   /* Restore the default exception setup */
154   __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
155   __xbt_ex_terminate = &__xbt_ex_terminate_default;
156
157   /* Finish context module and SURF */
158   SIMIX_context_mod_exit();
159
160   surf_exit();
161
162   xbt_mallocator_free(simix_global->action_mallocator);
163   xbt_free(simix_global);
164   simix_global = NULL;
165
166   return;
167 }
168
169
170 /**
171  * \brief A clock (in second).
172  *
173  * \return Return the clock.
174  */
175 XBT_INLINE double SIMIX_get_clock(void)
176 {
177   if(MC_IS_ENABLED){
178     return MC_process_clock_get(SIMIX_process_self());
179   }else{
180     return surf_get_clock();
181   }
182 }
183
184 void SIMIX_run(void)
185 {
186   double time = 0;
187   smx_req_t req;
188   xbt_swag_t set;
189   surf_action_t action;
190   smx_timer_t timer;
191   surf_model_t model;
192   unsigned int iter;
193
194   do {
195     XBT_DEBUG("New Schedule Round; size(queue)=%lu",
196         xbt_dynar_length(simix_global->process_to_run));
197 #ifdef TIME_BENCH
198     smx_ctx_raw_new_sr();
199 #endif
200     do {
201       XBT_DEBUG("New Sub-Schedule Round; size(queue)=%lu",
202               xbt_dynar_length(simix_global->process_to_run));
203       SIMIX_context_runall(simix_global->process_to_run);
204       while ((req = SIMIX_request_pop())) {
205         XBT_DEBUG("Handling request %p", req);
206         SIMIX_request_pre(req, 0);
207       }
208     } while (xbt_dynar_length(simix_global->process_to_run));
209
210     time = surf_solve(SIMIX_timer_next());
211
212     /* Notify all the hosts that have failed */
213     /* FIXME: iterate through the list of failed host and mark each of them */
214     /* as failed. On each host, signal all the running processes with host_fail */
215
216     /* Handle any pending timer */
217     while (xbt_heap_size(simix_timers) > 0 && SIMIX_get_clock() >= SIMIX_timer_next()) {
218        //FIXME: make the timers being real callbacks
219        // (i.e. provide dispatchers that read and expand the args) 
220        timer = xbt_heap_pop(simix_timers);
221        if (timer->func)
222          ((void (*)(void*))timer->func)(timer->args);
223     }
224     /* Wake up all process waiting for the action finish */
225     xbt_dynar_foreach(model_list, iter, model) {
226       for (set = model->states.failed_action_set;
227            set;
228            set = (set == model->states.failed_action_set)
229                  ? model->states.done_action_set
230                  : NULL) {
231         while ((action = xbt_swag_extract(set)))
232           SIMIX_request_post((smx_action_t) action->data);
233       }
234     }
235   } while (time != -1.0);
236
237   if (xbt_swag_size(simix_global->process_list) != 0) {
238
239     XBT_WARN("Oops ! Deadlock or code not perfectly clean.");
240     SIMIX_display_process_status();
241     xbt_abort();
242   }
243 }
244
245 /**
246  *      \brief Set the date to execute a function
247  *
248  * Set the date to execute the function on the surf.
249  *      \param date Date to execute function
250  *      \param function Function to be executed
251  *      \param arg Parameters of the function
252  *
253  */
254 XBT_INLINE void SIMIX_timer_set(double date, void *function, void *arg)
255 {
256   smx_timer_t timer = xbt_new0(s_smx_timer_t, 1);
257
258   timer->date = date;
259   timer->func = function;
260   timer->args = arg;
261   xbt_heap_push(simix_timers, timer, date);
262 }
263
264 /**
265  * \brief Registers a function to create a process.
266  *
267  * This function registers a function to be called
268  * when a new process is created. The function has
269  * to call SIMIX_process_create().
270  * \param function create process function
271  */
272 XBT_INLINE void SIMIX_function_register_process_create(smx_creation_func_t
273                                                        function)
274 {
275   simix_global->create_process_function = function;
276 }
277
278 /**
279  * \brief Registers a function to kill a process.
280  *
281  * This function registers a function to be called when a
282  * process is killed. The function has to call the SIMIX_process_kill().
283  *
284  * \param function Kill process function
285  */
286 XBT_INLINE void SIMIX_function_register_process_kill(void_pfn_smxprocess_t
287                                                      function)
288 {
289   simix_global->kill_process_function = function;
290 }
291
292 /**
293  * \brief Registers a function to cleanup a process.
294  *
295  * This function registers a user function to be called when
296  * a process ends properly.
297  *
298  * \param function cleanup process function
299  */
300 XBT_INLINE void SIMIX_function_register_process_cleanup(void_pfn_smxprocess_t
301                                                         function)
302 {
303   simix_global->cleanup_process_function = function;
304 }
305
306
307 void SIMIX_display_process_status(void)
308 {
309   if (simix_global->process_list == NULL) {
310     return;
311   }
312
313   smx_process_t process = NULL;
314   int nbprocess = xbt_swag_size(simix_global->process_list);
315
316   XBT_INFO("%d processes are still running, waiting for something.", nbprocess);
317   /*  List the process and their state */
318   XBT_INFO
319     ("Legend of the following listing: \"<process> on <host>: <status>.\"");
320   xbt_swag_foreach(process, simix_global->process_list) {
321
322     if (process->waiting_action) {
323
324       const char* action_description = "unknown";
325       switch (process->waiting_action->type) {
326
327         case SIMIX_ACTION_EXECUTE:
328           action_description = "execution";
329           break;
330
331         case SIMIX_ACTION_PARALLEL_EXECUTE:
332           action_description = "parallel execution";
333           break;
334
335         case SIMIX_ACTION_COMMUNICATE:
336           action_description = "communication";
337           break;
338
339         case SIMIX_ACTION_SLEEP:
340           action_description = "sleeping";
341           break;
342
343         case SIMIX_ACTION_SYNCHRO:
344           action_description = "synchronization";
345           break;
346
347         case SIMIX_ACTION_IO:
348           action_description = "I/O";
349           break;
350       }
351       XBT_INFO("Waiting for %s action %p to finish", action_description, process->waiting_action);
352     }
353   }
354 }
355
356 static void* SIMIX_action_mallocator_new_f(void) {
357   smx_action_t action = xbt_new(s_smx_action_t, 1);
358   action->request_list = xbt_fifo_new();
359   return action;
360 }
361
362 static void SIMIX_action_mallocator_free_f(void* action) {
363   xbt_fifo_free(((smx_action_t) action)->request_list);
364   xbt_free(action);
365 }
366
367 static void SIMIX_action_mallocator_reset_f(void* action) {
368
369   // we also recycle the request list
370   xbt_fifo_t fifo = ((smx_action_t) action)->request_list;
371   xbt_fifo_reset(fifo);
372   memset(action, 0, sizeof(s_smx_action_t));
373   ((smx_action_t) action)->request_list = fifo;
374 }