src/simix/smx_host.c

   1 /* Copyright (c) 2007-2012. 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 "smx_private.h"
   8 #include "xbt/sysdep.h"
   9 #include "xbt/log.h"
  10 #include "xbt/dict.h"
  11 #include "mc/mc.h"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix,
  14                                 "Logging specific to SIMIX (hosts)");
  15
  16 static void SIMIX_execution_finish(smx_action_t action);
  17
  18 /**
  19  * \brief Internal function to create a SIMIX host.
  20  * \param name name of the host to create
  21  * \param workstation the SURF workstation to encapsulate
  22  * \param data some user data (may be NULL)
  23  */
  24 smx_host_t SIMIX_host_create(const char *name,
  25                                void *workstation, void *data)
  26 {
  27   smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
  28   s_smx_process_t proc;
  29
  30   /* Host structure */
  31   smx_host->data = data;
  32   smx_host->process_list =
  33       xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
  34
  35   /* Update global variables */
  36   xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
  37
  38   return xbt_lib_get_elm_or_null(host_lib, name);
  39 }
  40
  41 void SIMIX_pre_host_on(smx_host_t h)
  42 {
  43   SIMIX_host_on(h);
  44 }
  45
  46 /**
  47  * \brief Start the host if it is off
  48  *
  49  */
  50 void SIMIX_host_on(smx_host_t h)
  51 {
  52   smx_host_priv_t host = (smx_host_priv_t) h;
  53
  54   xbt_assert((host != NULL), "Invalid parameters");
  55
  56   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
  57   ws_model->extension.workstation.set_state(host, SURF_RESOURCE_ON);
  58
  59   SIMIX_host_restart_processes(h);
  60 }
  61
  62 void SIMIX_pre_host_off(smx_host_t h)
  63 {
  64   SIMIX_host_off(h);
  65 }
  66
  67 /**
  68  * \brief Stop the host if it is on
  69  *
  70  */
  71 void SIMIX_host_off(smx_host_t h)
  72 {
  73   smx_host_priv_t host = (smx_host_priv_t) h;
  74
  75   xbt_assert((host != NULL), "Invalid parameters");
  76
  77   /* Clean Simulator data */
  78   if (xbt_swag_size(host->process_list) != 0) {
  79     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
  80     char *tmp;
  81     smx_process_t process = NULL;
  82
  83     xbt_swag_foreach(process, host->process_list) {
  84       tmp = bprintf("%s\n\t%s", msg, process->name);
  85       free(msg);
  86       msg = tmp;
  87     }
  88     SIMIX_display_process_status();
  89     THROWF(arg_error, 0, "%s", msg);
  90   }
  91   xbt_swag_free(host->process_list);
  92
  93   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
  94   ws_model->extension.workstation.set_state(host, SURF_RESOURCE_OFF);
  95 }
  96
  97 /**
  98  * \brief Internal function to destroy a SIMIX host.
  99  *
 100  * \param h the host to destroy (a smx_host_t)
 101  */
 102 void SIMIX_host_destroy(void *h)
 103 {
 104   smx_host_priv_t host = (smx_host_priv_t) h;
 105
 106   xbt_assert((host != NULL), "Invalid parameters");
 107
 108   /* Clean Simulator data */
 109   if (xbt_swag_size(host->process_list) != 0) {
 110     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
 111     char *tmp;
 112     smx_process_t process = NULL;
 113
 114     xbt_swag_foreach(process, host->process_list) {
 115       tmp = bprintf("%s\n\t%s", msg, process->name);
 116       free(msg);
 117       msg = tmp;
 118     }
 119     SIMIX_display_process_status();
 120     THROWF(arg_error, 0, "%s", msg);
 121   }
 122   xbt_dynar_free(&host->auto_restart_processes);
 123   xbt_swag_free(host->process_list);
 124
 125   /* Clean host structure */
 126   free(host);
 127   return;
 128 }
 129
 130 ///**
 131 // * \brief Returns a dict of all hosts.
 132 // *
 133 // * \return List of all hosts (as a #xbt_dict_t)
 134 // */
 135 //xbt_dict_t SIMIX_host_get_dict(void)
 136 //{
 137 //  xbt_dict_t host_dict = xbt_dict_new_homogeneous(NULL);
 138 //  xbt_lib_cursor_t cursor = NULL;
 139 //  char *name = NULL;
 140 //  void **host = NULL;
 141 //
 142 //  xbt_lib_foreach(host_lib, cursor, name, host){
 143 //    if(host[SIMIX_HOST_LEVEL])
 144 //            xbt_dict_set(host_dict,name,host[SIMIX_HOST_LEVEL], NULL);
 145 //  }
 146 //  return host_dict;
 147 //}
 148 smx_host_t SIMIX_pre_host_get_by_name(smx_simcall_t simcall, const char *name){
 149    return SIMIX_host_get_by_name(name);
 150 }
 151 smx_host_t SIMIX_host_get_by_name(const char *name){
 152   xbt_assert(((simix_global != NULL)
 153                && (host_lib != NULL)),
 154               "Environment not set yet");
 155
 156   return xbt_lib_get_elm_or_null(host_lib, name);
 157 }
 158
 159 smx_host_t SIMIX_host_self(void)
 160 {
 161   smx_process_t process = SIMIX_process_self();
 162   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 163 }
 164
 165 const char* SIMIX_pre_host_self_get_name(smx_simcall_t simcall){
 166    return SIMIX_host_self_get_name();
 167 }
 168 /* needs to be public and without simcall because it is called
 169    by exceptions and logging events */
 170 const char* SIMIX_host_self_get_name(void)
 171 {
 172   smx_host_t host = SIMIX_host_self();
 173   if (host == NULL || SIMIX_process_self() == simix_global->maestro_process)
 174     return "";
 175
 176   return SIMIX_host_get_name(host);
 177 }
 178
 179 const char* SIMIX_pre_host_get_name(smx_simcall_t simcall, smx_host_t host){
 180    return SIMIX_host_get_name(host);
 181 }
 182 const char* SIMIX_host_get_name(smx_host_t host){
 183   xbt_assert((host != NULL), "Invalid parameters");
 184
 185   return sg_host_name(host);
 186 }
 187
 188 xbt_dict_t SIMIX_pre_host_get_properties(smx_simcall_t simcall, smx_host_t host){
 189   return SIMIX_host_get_properties(host);
 190 }
 191 xbt_dict_t SIMIX_host_get_properties(smx_host_t host){
 192   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 193
 194   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 195   return ws_model->extension.workstation.get_properties(host);
 196 }
 197
 198 double SIMIX_pre_host_get_speed(smx_simcall_t simcall, smx_host_t host){
 199   return SIMIX_host_get_speed(host);
 200 }
 201 double SIMIX_host_get_speed(smx_host_t host){
 202   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 203
 204   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 205   return ws_model->extension.workstation.get_speed(host, 1.0);
 206 }
 207
 208 double SIMIX_pre_host_get_available_speed(smx_simcall_t simcall, smx_host_t host){
 209   return SIMIX_host_get_available_speed(host);
 210 }
 211 double SIMIX_host_get_available_speed(smx_host_t host){
 212   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 213
 214   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 215   return ws_model->extension.workstation.get_available_speed(host);
 216 }
 217
 218 int SIMIX_pre_host_get_state(smx_simcall_t simcall, smx_host_t host){
 219   return SIMIX_host_get_state(host);
 220 }
 221 int SIMIX_host_get_state(smx_host_t host){
 222   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 223
 224   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 225   return ws_model->extension.workstation.get_state(host);
 226 }
 227
 228 void* SIMIX_pre_host_self_get_data(smx_simcall_t simcall){
 229   return SIMIX_host_self_get_data();
 230 }
 231 void* SIMIX_host_self_get_data(void)
 232 {
 233   smx_host_t self = SIMIX_host_self();
 234   return SIMIX_host_get_data(self);
 235 }
 236
 237 void SIMIX_host_self_set_data(void *data)
 238 {
 239   smx_host_t self = SIMIX_host_self();
 240   SIMIX_host_set_data(self, data);
 241 }
 242
 243 void* SIMIX_pre_host_get_data(smx_simcall_t simcall,smx_host_t host){
 244   return SIMIX_host_get_data(host);
 245 }
 246 void* SIMIX_host_get_data(smx_host_t host){
 247   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 248
 249   return SIMIX_host_priv(host)->data;
 250 }
 251 void _SIMIX_host_free_process_arg(void *);
 252 void _SIMIX_host_free_process_arg(void *data)
 253 {
 254   smx_process_arg_t arg = *(void**)data;
 255   xbt_free(arg->name);
 256   xbt_free(arg);
 257 }
 258 /**
 259  * \brief Add a process to the list of the processes that the host will restart when it comes back
 260  * This function add a process to the list of the processes that will be restarted when the host comes
 261  * back. It is expected that this function is called when the host is down.
 262  * The processes will only be restarted once, meaning that you will have to register the process
 263  * again to restart the process again.
 264  */
 265 void SIMIX_host_add_auto_restart_process(smx_host_t host,
 266                                          const char *name,
 267                                          xbt_main_func_t code,
 268                                          void *data,
 269                                          const char *hostname,
 270                                          double kill_time,
 271                                          int argc, char **argv,
 272                                          xbt_dict_t properties,
 273                                          int auto_restart)
 274 {
 275   if (!SIMIX_host_priv(host)->auto_restart_processes) {
 276     SIMIX_host_priv(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 277   }
 278   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 279   arg->name = xbt_strdup(name);
 280   arg->code = code;
 281   arg->data = data;
 282   arg->hostname = hostname;
 283   arg->kill_time = kill_time;
 284   arg->argc = argc;
 285
 286   arg->argv = xbt_new(char*,argc + 1);
 287
 288   int i;
 289   for (i = 0; i < argc; i++) {
 290     arg->argv[i] = xbt_strdup(argv[i]);
 291   }
 292   arg->argv[argc] = NULL;
 293
 294   arg->properties = properties;
 295   arg->auto_restart = auto_restart;
 296
 297   if( SIMIX_host_get_state(host) == SURF_RESOURCE_OFF
 298       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_name(host))){
 299     xbt_dict_set(watched_hosts_lib,sg_host_name(host),host,NULL);
 300     XBT_DEBUG("Have push host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_name(host));
 301   }
 302   xbt_dynar_push_as(SIMIX_host_priv(host)->auto_restart_processes,smx_process_arg_t,arg);
 303 }
 304 /**
 305  * \brief Restart the list of processes that have been registered to the host
 306  */
 307 void SIMIX_host_restart_processes(smx_host_t host)
 308 {
 309   unsigned int cpt;
 310   smx_process_arg_t arg;
 311   xbt_dynar_foreach(SIMIX_host_priv(host)->auto_restart_processes,cpt,arg) {
 312
 313     smx_process_t process;
 314
 315     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 316     if (simix_global->create_process_function) {
 317       simix_global->create_process_function(&process,
 318                                             arg->argv[0],
 319                                             arg->code,
 320                                             NULL,
 321                                             arg->hostname,
 322                                             arg->kill_time,
 323                                             arg->argc,
 324                                             arg->argv,
 325                                             arg->properties,
 326                                             arg->auto_restart);
 327     }
 328     else {
 329       simcall_process_create(&process,
 330                                             arg->argv[0],
 331                                             arg->code,
 332                                             NULL,
 333                                             arg->hostname,
 334                                             arg->kill_time,
 335                                             arg->argc,
 336                                             arg->argv,
 337                                             arg->properties,
 338                                             arg->auto_restart);
 339
 340     }
 341   }
 342   xbt_dynar_reset(SIMIX_host_priv(host)->auto_restart_processes);
 343 }
 344
 345 void SIMIX_host_autorestart(smx_host_t host)
 346 {
 347   if(simix_global->autorestart)
 348     simix_global->autorestart(host);
 349   else
 350     xbt_die("No function for simix_global->autorestart");
 351 }
 352
 353 void SIMIX_pre_host_set_data(smx_simcall_t simcall, smx_host_t host, void *data) {
 354   SIMIX_host_set_data(host, data);
 355 }
 356 void SIMIX_host_set_data(smx_host_t host, void *data){
 357   xbt_assert((host != NULL), "Invalid parameters");
 358   xbt_assert((SIMIX_host_priv(host)->data == NULL), "Data already set");
 359
 360   SIMIX_host_priv(host)->data = data;
 361 }
 362
 363 smx_action_t SIMIX_pre_host_execute(smx_simcall_t simcall,const char *name,
 364     smx_host_t host, double computation_amount, double priority, double bound){
 365   return SIMIX_host_execute(name, host, computation_amount, priority, bound);
 366 }
 367 smx_action_t SIMIX_host_execute(const char *name,
 368     smx_host_t host, double computation_amount, double priority, double bound){
 369
 370   /* alloc structures and initialize */
 371   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 372   action->type = SIMIX_ACTION_EXECUTE;
 373   action->name = xbt_strdup(name);
 374   action->state = SIMIX_RUNNING;
 375   action->execution.host = host;
 376
 377 #ifdef HAVE_TRACING
 378   action->category = NULL;
 379 #endif
 380
 381   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 382   /* set surf's action */
 383   if (!MC_is_active()) {
 384     action->execution.surf_exec = ws_model->extension.workstation.execute(host, computation_amount);
 385     ws_model->action_data_set(action->execution.surf_exec, action);
 386     ws_model->set_priority(action->execution.surf_exec, priority);
 387     ws_model->set_bound(action->execution.surf_exec, bound);
 388   }
 389
 390   XBT_DEBUG("Create execute action %p", action);
 391
 392   return action;
 393 }
 394
 395 smx_action_t SIMIX_pre_host_parallel_execute(smx_simcall_t simcall, const char *name,
 396     int host_nb, smx_host_t *host_list,
 397     double *computation_amount, double *communication_amount,
 398     double amount, double rate){
 399   return SIMIX_host_parallel_execute(name, host_nb, host_list, computation_amount,
 400                                      communication_amount, amount, rate);
 401 }
 402 smx_action_t SIMIX_host_parallel_execute(const char *name,
 403     int host_nb, smx_host_t *host_list,
 404     double *computation_amount, double *communication_amount,
 405     double amount, double rate){
 406
 407   void **workstation_list = NULL;
 408   int i;
 409
 410   /* alloc structures and initialize */
 411   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 412   action->type = SIMIX_ACTION_PARALLEL_EXECUTE;
 413   action->name = xbt_strdup(name);
 414   action->state = SIMIX_RUNNING;
 415   action->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 416
 417 #ifdef HAVE_TRACING
 418   action->category = NULL;
 419 #endif
 420
 421   /* set surf's action */
 422   workstation_list = xbt_new0(void *, host_nb);
 423   for (i = 0; i < host_nb; i++)
 424     workstation_list[i] = host_list[i];
 425
 426
 427   /* FIXME: what happens if host_list contains VMs and PMs. If
 428    * execute_parallel_task() does not change the state of the model, we can mix
 429    * them. */
 430   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_WKS_LEVEL);
 431   for (i = 1; i < host_nb; i++) {
 432     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_WKS_LEVEL);
 433     if (ws_model_tmp != ws_model) {
 434       XBT_CRITICAL("mixing VMs and PMs is not supported");
 435       DIE_IMPOSSIBLE;
 436     }
 437   }
 438
 439   /* set surf's action */
 440   if (!MC_is_active()) {
 441     action->execution.surf_exec =
 442       ws_model->extension.workstation.
 443       execute_parallel_task(host_nb, workstation_list, computation_amount,
 444                       communication_amount, rate);
 445
 446     ws_model->action_data_set(action->execution.surf_exec, action);
 447   }
 448   XBT_DEBUG("Create parallel execute action %p", action);
 449
 450   return action;
 451 }
 452
 453 static surf_model_t get_ws_model_from_action(smx_action_t action)
 454 {
 455   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 456   smx_host_t host = action->execution.host;
 457   surf_model_t model = surf_resource_model(host, SURF_WKS_LEVEL);
 458
 459   xbt_assert((model == surf_workstation_model) || (model == surf_vm_workstation_model));
 460
 461   return model;
 462 }
 463
 464 void SIMIX_pre_host_execution_destroy(smx_simcall_t simcall, smx_action_t action){
 465   SIMIX_host_execution_destroy(action);
 466 }
 467 void SIMIX_host_execution_destroy(smx_action_t action){
 468   XBT_DEBUG("Destroy action %p", action);
 469
 470   surf_model_t ws_model = get_ws_model_from_action(action);
 471
 472   if (action->execution.surf_exec) {
 473     ws_model->action_unref(action->execution.surf_exec);
 474     action->execution.surf_exec = NULL;
 475   }
 476   xbt_free(action->name);
 477   xbt_mallocator_release(simix_global->action_mallocator, action);
 478 }
 479
 480 void SIMIX_pre_host_execution_cancel(smx_simcall_t simcall, smx_action_t action){
 481   SIMIX_host_execution_cancel(action);
 482 }
 483 void SIMIX_host_execution_cancel(smx_action_t action){
 484   XBT_DEBUG("Cancel action %p", action);
 485
 486   surf_model_t ws_model = get_ws_model_from_action(action);
 487
 488   if (action->execution.surf_exec)
 489     ws_model->action_cancel(action->execution.surf_exec);
 490 }
 491
 492 double SIMIX_pre_host_execution_get_remains(smx_simcall_t simcall, smx_action_t action){
 493   return SIMIX_host_execution_get_remains(action);
 494 }
 495 double SIMIX_host_execution_get_remains(smx_action_t action){
 496   double result = 0.0;
 497   surf_model_t ws_model = get_ws_model_from_action(action);
 498
 499   if (action->state == SIMIX_RUNNING)
 500     result = ws_model->get_remains(action->execution.surf_exec);
 501
 502   return result;
 503 }
 504
 505 e_smx_state_t SIMIX_pre_host_execution_get_state(smx_simcall_t simcall, smx_action_t action){
 506   return SIMIX_host_execution_get_state(action);
 507 }
 508 e_smx_state_t SIMIX_host_execution_get_state(smx_action_t action){
 509   return action->state;
 510 }
 511
 512 void SIMIX_pre_host_execution_set_priority(smx_simcall_t simcall, smx_action_t action,
 513                                         double priority){
 514   SIMIX_host_execution_set_priority(action, priority);
 515 }
 516 void SIMIX_host_execution_set_priority(smx_action_t action, double priority){
 517   surf_model_t ws_model = get_ws_model_from_action(action);
 518
 519   if(action->execution.surf_exec)
 520     ws_model->set_priority(action->execution.surf_exec, priority);
 521 }
 522
 523 void SIMIX_pre_host_execution_set_bound(smx_simcall_t simcall, smx_action_t action,
 524                                         double bound){
 525   SIMIX_host_execution_set_bound(action, bound);
 526 }
 527 void SIMIX_host_execution_set_bound(smx_action_t action, double bound){
 528   surf_model_t ws_model = get_ws_model_from_action(action);
 529
 530   if(action->execution.surf_exec)
 531     ws_model->set_bound(action->execution.surf_exec, bound);
 532 }
 533
 534 void SIMIX_pre_host_execution_wait(smx_simcall_t simcall, smx_action_t action){
 535
 536   XBT_DEBUG("Wait for execution of action %p, state %d", action, (int)action->state);
 537
 538   /* Associate this simcall to the action */
 539   xbt_fifo_push(action->simcalls, simcall);
 540   simcall->issuer->waiting_action = action;
 541
 542   /* set surf's action */
 543   if (MC_is_active()) {
 544     action->state = SIMIX_DONE;
 545     SIMIX_execution_finish(action);
 546     return;
 547   }
 548
 549   /* If the action is already finished then perform the error handling */
 550   if (action->state != SIMIX_RUNNING)
 551     SIMIX_execution_finish(action);
 552 }
 553
 554 void SIMIX_host_execution_suspend(smx_action_t action)
 555 {
 556   surf_model_t ws_model = get_ws_model_from_action(action);
 557
 558   if(action->execution.surf_exec)
 559     ws_model->suspend(action->execution.surf_exec);
 560 }
 561
 562 void SIMIX_host_execution_resume(smx_action_t action)
 563 {
 564   surf_model_t ws_model = get_ws_model_from_action(action);
 565
 566   if(action->execution.surf_exec)
 567     ws_model->resume(action->execution.surf_exec);
 568 }
 569
 570 void SIMIX_execution_finish(smx_action_t action)
 571 {
 572   xbt_fifo_item_t item;
 573   smx_simcall_t simcall;
 574   surf_model_t ws_model = get_ws_model_from_action(action);
 575
 576   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 577
 578     switch (action->state) {
 579
 580       case SIMIX_DONE:
 581         /* do nothing, action done */
 582   XBT_DEBUG("SIMIX_execution_finished: execution successful");
 583         break;
 584
 585       case SIMIX_FAILED:
 586         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_name(simcall->issuer->smx_host));
 587         simcall->issuer->context->iwannadie = 1;
 588         //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 589         break;
 590
 591       case SIMIX_CANCELED:
 592         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 593         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 594         break;
 595
 596       default:
 597         xbt_die("Internal error in SIMIX_execution_finish: unexpected action state %d",
 598             (int)action->state);
 599     }
 600     /* check if the host is down */
 601     if (ws_model->extension.workstation.get_state(simcall->issuer->smx_host) != SURF_RESOURCE_ON) {
 602       simcall->issuer->context->iwannadie = 1;
 603     }
 604
 605     simcall->issuer->waiting_action =    NULL;
 606     simcall_host_execution_wait__set__result(simcall, action->state);
 607     SIMIX_simcall_answer(simcall);
 608   }
 609
 610   /* We no longer need it */
 611   SIMIX_host_execution_destroy(action);
 612 }
 613
 614
 615 void SIMIX_post_host_execute(smx_action_t action)
 616 {
 617   surf_model_t ws_model = get_ws_model_from_action(action);
 618
 619   if (action->type == SIMIX_ACTION_EXECUTE && /* FIMXE: handle resource failure
 620                                                * for parallel tasks too */
 621       ws_model->extension.workstation.get_state(action->execution.host) == SURF_RESOURCE_OFF) {
 622     /* If the host running the action failed, notice it so that the asking
 623      * process can be killed if it runs on that host itself */
 624     action->state = SIMIX_FAILED;
 625   } else if (ws_model->action_state_get(action->execution.surf_exec) == SURF_ACTION_FAILED) {
 626     /* If the host running the action didn't fail, then the action was
 627      * canceled */
 628     action->state = SIMIX_CANCELED;
 629   } else {
 630     action->state = SIMIX_DONE;
 631   }
 632
 633   if (action->execution.surf_exec) {
 634     ws_model->action_unref(action->execution.surf_exec);
 635     action->execution.surf_exec = NULL;
 636   }
 637
 638   /* If there are simcalls associated with the action, then answer them */
 639   if (xbt_fifo_size(action->simcalls)) {
 640     SIMIX_execution_finish(action);
 641   }
 642 }
 643
 644
 645 #ifdef HAVE_TRACING
 646 void SIMIX_pre_set_category(smx_simcall_t simcall, smx_action_t action,
 647                             const char *category){
 648   SIMIX_set_category(action, category);
 649 }
 650 void SIMIX_set_category(smx_action_t action, const char *category)
 651 {
 652   surf_model_t ws_model = get_ws_model_from_action(action);
 653
 654   if (action->state != SIMIX_RUNNING) return;
 655   if (action->type == SIMIX_ACTION_EXECUTE){
 656     ws_model->set_category(action->execution.surf_exec, category);
 657   }else if (action->type == SIMIX_ACTION_COMMUNICATE){
 658     ws_model->set_category(action->comm.surf_comm, category);
 659   }
 660 }
 661 #endif
 662
 663
 664 /**
 665  * \brief Function to get the parameters of the given the SIMIX host.
 666  *
 667  * \param host the host to get_phys_host (a smx_host_t)
 668  * \param param the parameter object space to be overwritten (a ws_params_t)
 669  */
 670 void SIMIX_host_get_params(smx_host_t ind_vm, ws_params_t params)
 671 {
 672   /* jump to ws_get_params(). */
 673   surf_workstation_model->extension.workstation.get_params(ind_vm, params);
 674 }
 675
 676 void SIMIX_pre_host_get_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 677 {
 678   SIMIX_host_get_params(ind_vm, params);
 679   SIMIX_simcall_answer(simcall);
 680 }
 681
 682 void SIMIX_host_set_params(smx_host_t ind_vm, ws_params_t params)
 683 {
 684   /* jump to ws_set_params(). */
 685   surf_workstation_model->extension.workstation.set_params(ind_vm, params);
 686 }
 687
 688 void SIMIX_pre_host_set_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 689 {
 690   SIMIX_host_set_params(ind_vm, params);
 691   SIMIX_simcall_answer(simcall);
 692 }