src/simix/smx_global.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2007 Arnaud Legrand, Bruno Donassolo.
   4    All rights reserved.                                          */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the license (GNU LGPL) which comes with this package. */
   8
   9 #include "private.h"
  10 #include "xbt/sysdep.h"
  11 #include "xbt/log.h"
  12 #include "xbt/ex.h" /* ex_backtrace_display */
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_kernel, simix,
  14                                 "Logging specific to SIMIX (kernel)");
  15
  16 SIMIX_Global_t simix_global = NULL;
  17
  18 /********************************* SIMIX **************************************/
  19
  20 /**
  21  * \brief Initialize some SIMIX internal data.
  22  *
  23  * \param argc Argc
  24  * \param argv Argv
  25  */
  26 void SIMIX_global_init(int *argc, char **argv)
  27 {
  28         s_smx_process_t proc;
  29
  30         if (!simix_global) {
  31                 surf_init(argc, argv);  /* Initialize some common structures. Warning, it sets simix_global=NULL */
  32
  33                 simix_global = xbt_new0(s_SIMIX_Global_t,1);
  34
  35                 simix_global->host = xbt_fifo_new();
  36                 simix_global->process_to_run = xbt_swag_new(xbt_swag_offset(proc,synchro_hookup));
  37                 simix_global->process_list = xbt_swag_new(xbt_swag_offset(proc,process_hookup));
  38                 simix_global->current_process = NULL;
  39                 simix_global->registered_functions = xbt_dict_new();
  40
  41                 simix_global->create_process_function = NULL;
  42                 simix_global->kill_process_function = NULL;
  43         }
  44 }
  45
  46 /* Debug purpose, incomplete */
  47 void __SIMIX_display_process_status(void)
  48 {
  49    smx_process_t process = NULL;
  50    xbt_fifo_item_t item = NULL;
  51          smx_action_t act;
  52    int nbprocess=xbt_swag_size(simix_global->process_list);
  53
  54    INFO1("%d processes are still running, waiting for something.",
  55          nbprocess);
  56    /*  List the process and their state */
  57    INFO0("Legend of the following listing: \"<process> on <host>: <status>.\"");
  58    xbt_swag_foreach(process, simix_global->process_list) {
  59       smx_simdata_process_t p_simdata = (smx_simdata_process_t) process->simdata;
  60      // simdata_host_t h_simdata=(simdata_host_t)p_simdata->host->simdata;
  61       char *who, *who2;
  62
  63       asprintf(&who,"%s on %s: %s",
  64                process->name,
  65                p_simdata->s_host->name,
  66                (process->simdata->blocked)?"[BLOCKED] "
  67                :((process->simdata->suspended)?"[SUSPENDED] ":""));
  68
  69       if (p_simdata->mutex) {
  70          who2=bprintf("%s Blocked on mutex %p",who,p_simdata->mutex);
  71          free(who); who=who2;
  72       } else if (p_simdata->cond) {
  73          who2=bprintf("%s Blocked on condition %p; Waiting for the following actions:",who,p_simdata->cond);
  74          free(who); who=who2;
  75          xbt_fifo_foreach(p_simdata->cond->actions,item, act, smx_action_t) {
  76             who2=bprintf("%s '%s'",who,act->name);
  77             free(who); who=who2;
  78          }
  79       } else {
  80          who2=bprintf("%s Blocked in an unknown status (please report this bug)",who);
  81          free(who); who=who2;
  82       }
  83       INFO1("%s.",who);
  84       free(who);
  85    }
  86 }
  87
  88 /* FIXME: Yeah, I'll do it in a portable maner one day [Mt] */
  89 #include <signal.h>
  90
  91 static void _XBT_CALL inthandler(int ignored)
  92 {
  93    INFO0("CTRL-C pressed. Displaying status and bailing out");
  94    __SIMIX_display_process_status();
  95    exit(1);
  96 }
  97
  98 /**
  99  * \brief Launch the SIMIX simulation, debug purpose
 100  */
 101 void __SIMIX_main(void)
 102 {
 103         smx_process_t process = NULL;
 104         smx_cond_t cond = NULL;
 105         smx_action_t smx_action;
 106         xbt_fifo_t actions_done = xbt_fifo_new();
 107         xbt_fifo_t actions_failed = xbt_fifo_new();
 108
 109         /* Prepare to display some more info when dying on Ctrl-C pressing */
 110         signal(SIGINT,inthandler);
 111
 112         /* Clean IO before the run */
 113         fflush(stdout);
 114         fflush(stderr);
 115
 116         //surf_solve(); /* Takes traces into account. Returns 0.0 */
 117         /* xbt_fifo_size(msg_global->process_to_run) */
 118
 119         while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
 120
 121                 while ( (smx_action = xbt_fifo_pop(actions_failed)) ) {
 122
 123                         xbt_fifo_item_t _cursor;
 124
 125                         DEBUG1("** %s failed **",smx_action->name);
 126                         xbt_fifo_foreach(smx_action->cond_list,_cursor,cond,smx_cond_t) {
 127                                 xbt_swag_foreach(process,cond->sleeping) {
 128                                         DEBUG2("\t preparing to wake up %s on %s",
 129                                                         process->name,  process->simdata->s_host->name);
 130                                 }
 131                                 SIMIX_cond_broadcast(cond);
 132                                 /* remove conditional from action */
 133                                 xbt_fifo_remove(smx_action->cond_list,cond);
 134                         }
 135                 }
 136
 137                 while ( (smx_action = xbt_fifo_pop(actions_done)) ) {
 138                         xbt_fifo_item_t _cursor;
 139
 140                         DEBUG1("** %s done **",smx_action->name);
 141                         xbt_fifo_foreach(smx_action->cond_list,_cursor,cond,smx_cond_t) {
 142                                 xbt_swag_foreach(process,cond->sleeping) {
 143                                         DEBUG2("\t preparing to wake up %s on %s",
 144                                                         process->name,  process->simdata->s_host->name);
 145                                 }
 146                                 SIMIX_cond_broadcast(cond);
 147                                 /* remove conditional from action */
 148                                 xbt_fifo_remove(smx_action->cond_list,cond);
 149                         }
 150                 }
 151         }
 152         return;
 153 }
 154
 155 /**
 156  * \brief Kill all running process
 157  *
 158  */
 159 void SIMIX_process_killall()
 160 {
 161   smx_process_t p = NULL;
 162   smx_process_t self = SIMIX_process_self();
 163
 164   while((p=xbt_swag_extract(simix_global->process_list))) {
 165     if(p!=self) SIMIX_process_kill(p);
 166   }
 167
 168   xbt_context_empty_trash();
 169
 170   if(self) {
 171     xbt_context_yield();
 172   }
 173
 174   return;
 175 }
 176
 177 /**
 178  * \brief Clean the SIMIX simulation
 179  *
 180  * This functions remove all memories needed to the SIMIX execution
 181  */
 182 void SIMIX_clean(void)
 183 {
 184   xbt_fifo_item_t i = NULL;
 185   smx_host_t h = NULL;
 186   smx_process_t p = NULL;
 187
 188
 189   while((p=xbt_swag_extract(simix_global->process_list))) {
 190     SIMIX_process_kill(p);
 191   }
 192
 193   xbt_fifo_foreach(simix_global->host,i,h,smx_host_t) {
 194     __SIMIX_host_destroy(h);
 195   }
 196   xbt_fifo_free(simix_global->host);
 197   xbt_swag_free(simix_global->process_to_run);
 198   xbt_swag_free(simix_global->process_list);
 199   xbt_dict_free(&(simix_global->registered_functions));
 200   simix_config_finalize();
 201   free(simix_global);
 202   surf_exit();
 203
 204   return ;
 205 }
 206
 207
 208 /**
 209  * \brief A clock (in second).
 210  *
 211  * \return Return the clock.
 212  */
 213 double SIMIX_get_clock(void)
 214 {
 215   return surf_get_clock();
 216 }
 217
 218 /**
 219  *      \brief Does a turn of the simulation
 220  *
 221  *      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.
 222  *      \param actions_done List of actions done
 223  *      \param actions_failed List of actions failed
 224  *      \return The time spent to execute the simulation or -1 if the simulation ended
 225  */
 226 double SIMIX_solve(xbt_fifo_t actions_done, xbt_fifo_t actions_failed)
 227 {
 228
 229         smx_process_t process = NULL;
 230         int i;
 231         double elapsed_time = 0.0;
 232         static int state_modifications = 1;
 233         static int first = 1;
 234
 235         xbt_context_empty_trash();
 236         if(xbt_swag_size(simix_global->process_to_run) && (elapsed_time>0)) {
 237                 DEBUG0("**************************************************");
 238         }
 239         if (first) {
 240                 surf_solve();/* Takes traces into account. Returns 0.0 */
 241                 first=0;
 242         }
 243         while ((process = xbt_swag_extract(simix_global->process_to_run))) {
 244                 DEBUG2("Scheduling %s on %s",
 245                                 process->name,
 246                                 process->simdata->s_host->name);
 247                 simix_global->current_process = process;
 248                 xbt_context_schedule(process->simdata->context);
 249                 /*       fflush(NULL); */
 250                 simix_global->current_process = NULL;
 251         }
 252
 253         {
 254                 surf_action_t action = NULL;
 255                 surf_resource_t resource = NULL;
 256                 smx_action_t smx_action = NULL;
 257
 258                 void *fun = NULL;
 259                 void *arg = NULL;
 260
 261                 xbt_dynar_foreach(resource_list, i, resource) {
 262                         if(xbt_swag_size(resource->common_public->states.failed_action_set) ||
 263                                         xbt_swag_size(resource->common_public->states.done_action_set)) {
 264                                 state_modifications = 1;
 265                                 }
 266                 }
 267
 268                 if(!state_modifications) {
 269                         DEBUG1("%f : Calling surf_solve",SIMIX_get_clock());
 270                         elapsed_time = surf_solve();
 271                         DEBUG1("Elapsed_time %f",elapsed_time);
 272                 }
 273
 274                 while (surf_timer_resource->extension_public->get(&fun,(void*)&arg)) {
 275                         DEBUG2("got %p %p", fun, arg);
 276                         if(fun==SIMIX_process_create) {
 277                                 smx_process_arg_t args = arg;
 278                                 DEBUG2("Launching %s on %s", args->name, args->hostname);
 279                                 process = SIMIX_process_create(args->name, args->code,
 280                                                 args->data, args->hostname,
 281                                                 args->argc,args->argv,NULL);
 282                                 if(args->kill_time > SIMIX_get_clock()) {
 283                                         surf_timer_resource->extension_public->set(args->kill_time,
 284                                                         (void*) &SIMIX_process_kill,
 285                                                         (void*) process);
 286                                 }
 287                                 xbt_free(args);
 288                         }
 289                         if(fun==SIMIX_process_kill) {
 290                                 process = arg;
 291                                 DEBUG2("Killing %s on %s", process->name,
 292                                                 process->simdata->s_host->name);
 293                                 SIMIX_process_kill(process);
 294                         }
 295                 }
 296
 297                 /* Wake up all process waiting for the action finish */
 298                 xbt_dynar_foreach(resource_list, i, resource) {
 299                         while ((action = xbt_swag_extract(resource->common_public->states.failed_action_set))) {
 300                                 smx_action = action->data;
 301                                 if (smx_action) {
 302                                         xbt_fifo_unshift(actions_failed,smx_action);
 303                                 }
 304                         }
 305                         while ((action =xbt_swag_extract(resource->common_public->states.done_action_set))) {
 306                                 smx_action = action->data;
 307                                 if (smx_action) {
 308                                         xbt_fifo_unshift(actions_done,smx_action);
 309                                 }
 310                         }
 311                 }
 312         }
 313         state_modifications = 0;
 314
 315         if (elapsed_time == -1) {
 316                 if (xbt_swag_size(simix_global->process_list) == 0) {
 317 /*                      INFO0("Congratulations ! Simulation terminated : all processes are over"); */
 318                 } else {
 319                         INFO0("Oops ! Deadlock or code not perfectly clean.");
 320                         __SIMIX_display_process_status();
 321                         if(XBT_LOG_ISENABLED(simix, xbt_log_priority_debug) ||
 322                                         XBT_LOG_ISENABLED(simix_kernel, xbt_log_priority_debug)) {
 323                                 DEBUG0("Aborting!");
 324                                 xbt_abort();
 325                         }
 326                         INFO0("Return a Warning.");
 327                 }
 328         }
 329         return elapsed_time;
 330 }
 331
 332 /**
 333  *      \brief Set the date to execute a function
 334  *
 335  * Set the date to execute the function on the surf.
 336  *      \param date Date to execute function
 337  *      \param function Function to be executed
 338  *      \param arg Parameters of the function
 339  *
 340  */
 341 void SIMIX_timer_set (double date, void *function, void *arg)
 342 {
 343         surf_timer_resource->extension_public->set(date, function, arg);
 344 }
 345
 346 int SIMIX_timer_get(void **function, void **arg)
 347 {
 348         return surf_timer_resource->extension_public->get(function, arg);
 349 }
 350
 351 /**
 352  *      \brief Registers a function to create a process.
 353  *
 354  *      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.
 355  *      \param function Create process function
 356  *
 357  */
 358 void SIMIX_function_register_process_create(void * function)
 359 {
 360   xbt_assert0((simix_global->create_process_function == NULL), "Data already set");
 361
 362   /* Assign create process */
 363   simix_global->create_process_function = function;
 364
 365   return ;
 366 }
 367
 368 /**
 369  *      \brief Registers a function to kill a process.
 370  *
 371  *      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.
 372  *      \param function Kill process function
 373  *
 374  */
 375 void SIMIX_function_register_process_kill(void * function)
 376 {
 377   xbt_assert0((simix_global->kill_process_function == NULL), "Data already set");
 378
 379   /* Assign kill process */
 380   simix_global->kill_process_function = function;
 381
 382   return ;
 383 }