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_simcall_t simcall, 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 = SIMIX_host_priv(h);
  53
  54   xbt_assert((host != NULL), "Invalid parameters");
  55
  56   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
  57   if (ws_model->extension.workstation.get_state(h)==SURF_RESOURCE_OFF) {
  58     ws_model->extension.workstation.set_state(h, SURF_RESOURCE_ON);
  59     unsigned int cpt;
  60     smx_process_arg_t arg;
  61     xbt_dynar_foreach(host->boot_processes,cpt,arg) {
  62       smx_process_t process;
  63
  64       XBT_DEBUG("Booting Process %s(%s) right now", arg->argv[0], arg->hostname);
  65       if (simix_global->create_process_function) {
  66         simix_global->create_process_function(&process,
  67                                               arg->argv[0],
  68                                               arg->code,
  69                                               NULL,
  70                                               arg->hostname,
  71                                               arg->kill_time,
  72                                               arg->argc,
  73                                               arg->argv,
  74                                               arg->properties,
  75                                               arg->auto_restart);
  76       }
  77       else {
  78         simcall_process_create(&process,
  79                                               arg->argv[0],
  80                                               arg->code,
  81                                               NULL,
  82                                               arg->hostname,
  83                                               arg->kill_time,
  84                                               arg->argc,
  85                                               arg->argv,
  86                                               arg->properties,
  87                                               arg->auto_restart);
  88       }
  89     }
  90   }
  91 }
  92
  93 void SIMIX_pre_host_off(smx_simcall_t simcall, smx_host_t h)
  94 {
  95   SIMIX_host_off(h, simcall->issuer);
  96 }
  97
  98 /**
  99  * \brief Stop the host if it is on
 100  *
 101  */
 102 void SIMIX_host_off(smx_host_t h, smx_process_t issuer)
 103 {
 104   smx_host_priv_t host = SIMIX_host_priv(h);
 105
 106   xbt_assert((host != NULL), "Invalid parameters");
 107
 108   surf_model_t ws_model = surf_resource_model(h, SURF_WKS_LEVEL);
 109   if (ws_model->extension.workstation.get_state(h)==SURF_RESOURCE_ON) {
 110     ws_model->extension.workstation.set_state(h, SURF_RESOURCE_OFF);
 111
 112     /* Clean Simulator data */
 113     if (xbt_swag_size(host->process_list) != 0) {
 114       smx_process_t process = NULL;
 115       xbt_swag_foreach(process, host->process_list) {
 116         SIMIX_process_kill(process, issuer);
 117         XBT_DEBUG("Killing %s on %s by %s", process->name,  sg_host_name(process->smx_host), issuer->name);
 118       }
 119     }
 120   }
 121 }
 122
 123 /**
 124  * \brief Internal function to destroy a SIMIX host.
 125  *
 126  * \param h the host to destroy (a smx_host_t)
 127  */
 128 void SIMIX_host_destroy(void *h)
 129 {
 130   smx_host_priv_t host = (smx_host_priv_t) h;
 131
 132   xbt_assert((host != NULL), "Invalid parameters");
 133
 134   /* Clean Simulator data */
 135   if (xbt_swag_size(host->process_list) != 0) {
 136     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
 137     char *tmp;
 138     smx_process_t process = NULL;
 139
 140     xbt_swag_foreach(process, host->process_list) {
 141       tmp = bprintf("%s\n\t%s", msg, process->name);
 142       free(msg);
 143       msg = tmp;
 144     }
 145     SIMIX_display_process_status();
 146     THROWF(arg_error, 0, "%s", msg);
 147   }
 148   xbt_dynar_free(&host->auto_restart_processes);
 149   xbt_dynar_free(&host->boot_processes);
 150   xbt_swag_free(host->process_list);
 151
 152   /* Clean host structure */
 153   free(host);
 154   return;
 155 }
 156
 157 ///**
 158 // * \brief Returns a dict of all hosts.
 159 // *
 160 // * \return List of all hosts (as a #xbt_dict_t)
 161 // */
 162 //xbt_dict_t SIMIX_host_get_dict(void)
 163 //{
 164 //  xbt_dict_t host_dict = xbt_dict_new_homogeneous(NULL);
 165 //  xbt_lib_cursor_t cursor = NULL;
 166 //  char *name = NULL;
 167 //  void **host = NULL;
 168 //
 169 //  xbt_lib_foreach(host_lib, cursor, name, host){
 170 //    if(host[SIMIX_HOST_LEVEL])
 171 //            xbt_dict_set(host_dict,name,host[SIMIX_HOST_LEVEL], NULL);
 172 //  }
 173 //  return host_dict;
 174 //}
 175 smx_host_t SIMIX_pre_host_get_by_name(smx_simcall_t simcall, const char *name){
 176    return SIMIX_host_get_by_name(name);
 177 }
 178 smx_host_t SIMIX_host_get_by_name(const char *name){
 179   xbt_assert(((simix_global != NULL)
 180                && (host_lib != NULL)),
 181               "Environment not set yet");
 182
 183   return xbt_lib_get_elm_or_null(host_lib, name);
 184 }
 185
 186 smx_host_t SIMIX_host_self(void)
 187 {
 188   smx_process_t process = SIMIX_process_self();
 189   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 190 }
 191
 192 const char* SIMIX_pre_host_self_get_name(smx_simcall_t simcall){
 193    return SIMIX_host_self_get_name();
 194 }
 195 /* needs to be public and without simcall because it is called
 196    by exceptions and logging events */
 197 const char* SIMIX_host_self_get_name(void)
 198 {
 199   smx_host_t host = SIMIX_host_self();
 200   if (host == NULL || SIMIX_process_self() == simix_global->maestro_process)
 201     return "";
 202
 203   return SIMIX_host_get_name(host);
 204 }
 205
 206 const char* SIMIX_pre_host_get_name(smx_simcall_t simcall, smx_host_t host){
 207    return SIMIX_host_get_name(host);
 208 }
 209 const char* SIMIX_host_get_name(smx_host_t host){
 210   xbt_assert((host != NULL), "Invalid parameters");
 211
 212   return sg_host_name(host);
 213 }
 214
 215 xbt_dict_t SIMIX_pre_host_get_properties(smx_simcall_t simcall, smx_host_t host){
 216   return SIMIX_host_get_properties(host);
 217 }
 218 xbt_dict_t SIMIX_host_get_properties(smx_host_t host){
 219   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 220
 221   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 222   return ws_model->extension.workstation.get_properties(host);
 223 }
 224
 225 double SIMIX_pre_host_get_speed(smx_simcall_t simcall, smx_host_t host){
 226   return SIMIX_host_get_speed(host);
 227 }
 228 double SIMIX_host_get_speed(smx_host_t host){
 229   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 230
 231   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 232   return ws_model->extension.workstation.get_speed(host, 1.0);
 233 }
 234
 235 int SIMIX_pre_host_get_core(smx_simcall_t simcall, smx_host_t host){
 236   return SIMIX_host_get_core(host);
 237 }
 238 int SIMIX_host_get_core(smx_host_t host){
 239   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 240
 241   return surf_workstation_model->extension.workstation.
 242       get_core(host);
 243 }
 244
 245
 246
 247 double SIMIX_pre_host_get_available_speed(smx_simcall_t simcall, smx_host_t host){
 248   return SIMIX_host_get_available_speed(host);
 249 }
 250 double SIMIX_host_get_available_speed(smx_host_t host){
 251   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 252
 253   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 254   return ws_model->extension.workstation.get_available_speed(host);
 255 }
 256
 257 int SIMIX_pre_host_get_state(smx_simcall_t simcall, smx_host_t host){
 258   return SIMIX_host_get_state(host);
 259 }
 260 int SIMIX_host_get_state(smx_host_t host){
 261   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 262
 263   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 264   return ws_model->extension.workstation.get_state(host);
 265 }
 266
 267 void* SIMIX_pre_host_self_get_data(smx_simcall_t simcall){
 268   return SIMIX_host_self_get_data();
 269 }
 270 void* SIMIX_host_self_get_data(void)
 271 {
 272   smx_host_t self = SIMIX_host_self();
 273   return SIMIX_host_get_data(self);
 274 }
 275
 276 void SIMIX_host_self_set_data(void *data)
 277 {
 278   smx_host_t self = SIMIX_host_self();
 279   SIMIX_host_set_data(self, data);
 280 }
 281
 282 void* SIMIX_pre_host_get_data(smx_simcall_t simcall,smx_host_t host){
 283   return SIMIX_host_get_data(host);
 284 }
 285 void* SIMIX_host_get_data(smx_host_t host){
 286   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 287
 288   return SIMIX_host_priv(host)->data;
 289 }
 290
 291 void _SIMIX_host_free_process_arg(void *data)
 292 {
 293   smx_process_arg_t arg = *(void**)data;
 294   xbt_free(arg->name);
 295   xbt_free(arg);
 296 }
 297 /**
 298  * \brief Add a process to the list of the processes that the host will restart when it comes back
 299  * This function add a process to the list of the processes that will be restarted when the host comes
 300  * back. It is expected that this function is called when the host is down.
 301  * The processes will only be restarted once, meaning that you will have to register the process
 302  * again to restart the process again.
 303  */
 304 void SIMIX_host_add_auto_restart_process(smx_host_t host,
 305                                          const char *name,
 306                                          xbt_main_func_t code,
 307                                          void *data,
 308                                          const char *hostname,
 309                                          double kill_time,
 310                                          int argc, char **argv,
 311                                          xbt_dict_t properties,
 312                                          int auto_restart)
 313 {
 314   if (!SIMIX_host_priv(host)->auto_restart_processes) {
 315     SIMIX_host_priv(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 316   }
 317   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 318   arg->name = xbt_strdup(name);
 319   arg->code = code;
 320   arg->data = data;
 321   arg->hostname = hostname;
 322   arg->kill_time = kill_time;
 323   arg->argc = argc;
 324
 325   arg->argv = xbt_new(char*,argc + 1);
 326
 327   int i;
 328   for (i = 0; i < argc; i++) {
 329     arg->argv[i] = xbt_strdup(argv[i]);
 330   }
 331   arg->argv[argc] = NULL;
 332
 333   arg->properties = properties;
 334   arg->auto_restart = auto_restart;
 335
 336   if( SIMIX_host_get_state(host) == SURF_RESOURCE_OFF
 337       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_name(host))){
 338     xbt_dict_set(watched_hosts_lib,sg_host_name(host),host,NULL);
 339     XBT_DEBUG("Have push host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_name(host));
 340   }
 341   xbt_dynar_push_as(SIMIX_host_priv(host)->auto_restart_processes,smx_process_arg_t,arg);
 342 }
 343 /**
 344  * \brief Restart the list of processes that have been registered to the host
 345  */
 346 void SIMIX_host_restart_processes(smx_host_t host)
 347 {
 348   unsigned int cpt;
 349   smx_process_arg_t arg;
 350   xbt_dynar_foreach(SIMIX_host_priv(host)->auto_restart_processes,cpt,arg) {
 351
 352     smx_process_t process;
 353
 354     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 355     if (simix_global->create_process_function) {
 356       simix_global->create_process_function(&process,
 357                                             arg->argv[0],
 358                                             arg->code,
 359                                             NULL,
 360                                             arg->hostname,
 361                                             arg->kill_time,
 362                                             arg->argc,
 363                                             arg->argv,
 364                                             arg->properties,
 365                                             arg->auto_restart);
 366     }
 367     else {
 368       simcall_process_create(&process,
 369                                             arg->argv[0],
 370                                             arg->code,
 371                                             NULL,
 372                                             arg->hostname,
 373                                             arg->kill_time,
 374                                             arg->argc,
 375                                             arg->argv,
 376                                             arg->properties,
 377                                             arg->auto_restart);
 378
 379     }
 380   }
 381   xbt_dynar_reset(SIMIX_host_priv(host)->auto_restart_processes);
 382 }
 383
 384 void SIMIX_host_autorestart(smx_host_t host)
 385 {
 386   if(simix_global->autorestart)
 387     simix_global->autorestart(host);
 388   else
 389     xbt_die("No function for simix_global->autorestart");
 390 }
 391
 392 void SIMIX_pre_host_set_data(smx_simcall_t simcall, smx_host_t host, void *data) {
 393   SIMIX_host_set_data(host, data);
 394 }
 395 void SIMIX_host_set_data(smx_host_t host, void *data){
 396   xbt_assert((host != NULL), "Invalid parameters");
 397   xbt_assert((SIMIX_host_priv(host)->data == NULL), "Data already set");
 398
 399   SIMIX_host_priv(host)->data = data;
 400 }
 401
 402 smx_action_t SIMIX_pre_host_execute(smx_simcall_t simcall,const char *name,
 403     smx_host_t host, double computation_amount, double priority, double bound, unsigned long affinity_mask){
 404   return SIMIX_host_execute(name, host, computation_amount, priority, bound, affinity_mask);
 405 }
 406 smx_action_t SIMIX_host_execute(const char *name,
 407     smx_host_t host, double computation_amount, double priority, double bound, unsigned long affinity_mask){
 408
 409   /* alloc structures and initialize */
 410   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 411   action->type = SIMIX_ACTION_EXECUTE;
 412   action->name = xbt_strdup(name);
 413   action->state = SIMIX_RUNNING;
 414   action->execution.host = host;
 415
 416 #ifdef HAVE_TRACING
 417   action->category = NULL;
 418 #endif
 419
 420   surf_model_t ws_model = surf_resource_model(host, SURF_WKS_LEVEL);
 421   /* set surf's action */
 422   if (!MC_is_active()) {
 423     action->execution.surf_exec = ws_model->extension.workstation.execute(host, computation_amount);
 424     ws_model->action_data_set(action->execution.surf_exec, action);
 425     ws_model->set_priority(action->execution.surf_exec, priority);
 426
 427     /* Note (hypervisor): for multicore, the bound value being passed to the
 428      * surf layer should not be zero (i.e., unlimited). It should be the
 429      * capacity of a CPU core. */
 430     if (bound == 0)
 431       ws_model->set_bound(action->execution.surf_exec, SIMIX_host_get_speed(host));
 432     else
 433       ws_model->set_bound(action->execution.surf_exec, bound);
 434
 435     if (affinity_mask != 0) {
 436       /* just a double check to confirm that this host is the host where this task is running. */
 437       xbt_assert(action->execution.host == host);
 438       ws_model->set_affinity(action->execution.surf_exec, host, affinity_mask);
 439     }
 440   }
 441
 442   XBT_DEBUG("Create execute action %p", action);
 443
 444   return action;
 445 }
 446
 447 smx_action_t SIMIX_pre_host_parallel_execute(smx_simcall_t simcall, const char *name,
 448     int host_nb, smx_host_t *host_list,
 449     double *computation_amount, double *communication_amount,
 450     double amount, double rate){
 451   return SIMIX_host_parallel_execute(name, host_nb, host_list, computation_amount,
 452                                      communication_amount, amount, rate);
 453 }
 454 smx_action_t SIMIX_host_parallel_execute(const char *name,
 455     int host_nb, smx_host_t *host_list,
 456     double *computation_amount, double *communication_amount,
 457     double amount, double rate){
 458
 459   void **workstation_list = NULL;
 460   int i;
 461
 462   /* alloc structures and initialize */
 463   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 464   action->type = SIMIX_ACTION_PARALLEL_EXECUTE;
 465   action->name = xbt_strdup(name);
 466   action->state = SIMIX_RUNNING;
 467   action->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 468
 469 #ifdef HAVE_TRACING
 470   action->category = NULL;
 471 #endif
 472
 473   /* set surf's action */
 474   workstation_list = xbt_new0(void *, host_nb);
 475   for (i = 0; i < host_nb; i++)
 476     workstation_list[i] = host_list[i];
 477
 478
 479   /* FIXME: what happens if host_list contains VMs and PMs. If
 480    * execute_parallel_task() does not change the state of the model, we can mix
 481    * them. */
 482   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_WKS_LEVEL);
 483   for (i = 1; i < host_nb; i++) {
 484     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_WKS_LEVEL);
 485     if (ws_model_tmp != ws_model) {
 486       XBT_CRITICAL("mixing VMs and PMs is not supported");
 487       DIE_IMPOSSIBLE;
 488     }
 489   }
 490
 491   /* set surf's action */
 492   if (!MC_is_active()) {
 493     action->execution.surf_exec =
 494       ws_model->extension.workstation.
 495       execute_parallel_task(host_nb, workstation_list, computation_amount,
 496                       communication_amount, rate);
 497
 498     ws_model->action_data_set(action->execution.surf_exec, action);
 499   }
 500   XBT_DEBUG("Create parallel execute action %p", action);
 501
 502   return action;
 503 }
 504
 505 static surf_model_t get_ws_model_from_action(smx_action_t action)
 506 {
 507   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 508   smx_host_t host = action->execution.host;
 509   surf_model_t model = surf_resource_model(host, SURF_WKS_LEVEL);
 510
 511   xbt_assert((model == surf_workstation_model) || (model == surf_vm_workstation_model));
 512
 513   return model;
 514 }
 515
 516 void SIMIX_pre_host_execution_destroy(smx_simcall_t simcall, smx_action_t action){
 517   SIMIX_host_execution_destroy(action);
 518 }
 519 void SIMIX_host_execution_destroy(smx_action_t action){
 520   XBT_DEBUG("Destroy action %p", action);
 521
 522   surf_model_t ws_model = get_ws_model_from_action(action);
 523
 524   if (action->execution.surf_exec) {
 525     ws_model->action_unref(action->execution.surf_exec);
 526     action->execution.surf_exec = NULL;
 527   }
 528   xbt_free(action->name);
 529   xbt_mallocator_release(simix_global->action_mallocator, action);
 530 }
 531
 532 void SIMIX_pre_host_execution_cancel(smx_simcall_t simcall, smx_action_t action){
 533   SIMIX_host_execution_cancel(action);
 534 }
 535 void SIMIX_host_execution_cancel(smx_action_t action){
 536   XBT_DEBUG("Cancel action %p", action);
 537
 538   surf_model_t ws_model = get_ws_model_from_action(action);
 539
 540   if (action->execution.surf_exec)
 541     ws_model->action_cancel(action->execution.surf_exec);
 542 }
 543
 544 double SIMIX_pre_host_execution_get_remains(smx_simcall_t simcall, smx_action_t action){
 545   return SIMIX_host_execution_get_remains(action);
 546 }
 547 double SIMIX_host_execution_get_remains(smx_action_t action){
 548   double result = 0.0;
 549   surf_model_t ws_model = get_ws_model_from_action(action);
 550
 551   if (action->state == SIMIX_RUNNING)
 552     result = ws_model->get_remains(action->execution.surf_exec);
 553
 554   return result;
 555 }
 556
 557 e_smx_state_t SIMIX_pre_host_execution_get_state(smx_simcall_t simcall, smx_action_t action){
 558   return SIMIX_host_execution_get_state(action);
 559 }
 560 e_smx_state_t SIMIX_host_execution_get_state(smx_action_t action){
 561   return action->state;
 562 }
 563
 564 void SIMIX_pre_host_execution_set_priority(smx_simcall_t simcall, smx_action_t action,
 565                                         double priority){
 566   SIMIX_host_execution_set_priority(action, priority);
 567 }
 568 void SIMIX_host_execution_set_priority(smx_action_t action, double priority){
 569   surf_model_t ws_model = get_ws_model_from_action(action);
 570
 571   if(action->execution.surf_exec)
 572     ws_model->set_priority(action->execution.surf_exec, priority);
 573 }
 574
 575 void SIMIX_pre_host_execution_set_bound(smx_simcall_t simcall, smx_action_t action,
 576                                         double bound){
 577   SIMIX_host_execution_set_bound(action, bound);
 578 }
 579 void SIMIX_host_execution_set_bound(smx_action_t action, double bound){
 580   surf_model_t ws_model = get_ws_model_from_action(action);
 581
 582   if(action->execution.surf_exec)
 583     ws_model->set_bound(action->execution.surf_exec, bound);
 584 }
 585
 586 void SIMIX_pre_host_execution_set_affinity(smx_simcall_t simcall,
 587     smx_action_t action, smx_host_t host, unsigned long mask){
 588   SIMIX_host_execution_set_affinity(action, host, mask);
 589 }
 590 void SIMIX_host_execution_set_affinity(smx_action_t action, smx_host_t host, unsigned long mask){
 591   surf_model_t ws_model = get_ws_model_from_action(action);
 592
 593   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 594
 595   if (action->execution.surf_exec) {
 596     /* just a double check to confirm that this host is the host where this task is running. */
 597     xbt_assert(action->execution.host == host);
 598     ws_model->set_affinity(action->execution.surf_exec, host, mask);
 599   }
 600 }
 601
 602 void SIMIX_pre_host_execution_wait(smx_simcall_t simcall, smx_action_t action){
 603
 604   XBT_DEBUG("Wait for execution of action %p, state %d", action, (int)action->state);
 605
 606   /* Associate this simcall to the action */
 607   xbt_fifo_push(action->simcalls, simcall);
 608   simcall->issuer->waiting_action = action;
 609
 610   /* set surf's action */
 611   if (MC_is_active()) {
 612     action->state = SIMIX_DONE;
 613     SIMIX_execution_finish(action);
 614     return;
 615   }
 616
 617   /* If the action is already finished then perform the error handling */
 618   if (action->state != SIMIX_RUNNING)
 619     SIMIX_execution_finish(action);
 620 }
 621
 622 void SIMIX_host_execution_suspend(smx_action_t action)
 623 {
 624   surf_model_t ws_model = get_ws_model_from_action(action);
 625
 626   if(action->execution.surf_exec)
 627     ws_model->suspend(action->execution.surf_exec);
 628 }
 629
 630 void SIMIX_host_execution_resume(smx_action_t action)
 631 {
 632   surf_model_t ws_model = get_ws_model_from_action(action);
 633
 634   if(action->execution.surf_exec)
 635     ws_model->resume(action->execution.surf_exec);
 636 }
 637
 638 void SIMIX_execution_finish(smx_action_t action)
 639 {
 640   xbt_fifo_item_t item;
 641   smx_simcall_t simcall;
 642   surf_model_t ws_model = get_ws_model_from_action(action);
 643
 644   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 645
 646     switch (action->state) {
 647
 648       case SIMIX_DONE:
 649         /* do nothing, action done */
 650   XBT_DEBUG("SIMIX_execution_finished: execution successful");
 651         break;
 652
 653       case SIMIX_FAILED:
 654         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_name(simcall->issuer->smx_host));
 655         simcall->issuer->context->iwannadie = 1;
 656         //SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 657         break;
 658
 659       case SIMIX_CANCELED:
 660         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 661         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 662         break;
 663
 664       default:
 665         xbt_die("Internal error in SIMIX_execution_finish: unexpected action state %d",
 666             (int)action->state);
 667     }
 668     /* check if the host is down */
 669     if (ws_model->extension.workstation.get_state(simcall->issuer->smx_host) != SURF_RESOURCE_ON) {
 670       simcall->issuer->context->iwannadie = 1;
 671     }
 672
 673     simcall->issuer->waiting_action =    NULL;
 674     simcall_host_execution_wait__set__result(simcall, action->state);
 675     SIMIX_simcall_answer(simcall);
 676   }
 677
 678   /* We no longer need it */
 679   SIMIX_host_execution_destroy(action);
 680 }
 681
 682
 683 void SIMIX_post_host_execute(smx_action_t action)
 684 {
 685   surf_model_t ws_model = get_ws_model_from_action(action);
 686
 687   if (action->type == SIMIX_ACTION_EXECUTE && /* FIMXE: handle resource failure
 688                                                * for parallel tasks too */
 689       ws_model->extension.workstation.get_state(action->execution.host) == SURF_RESOURCE_OFF) {
 690     /* If the host running the action failed, notice it so that the asking
 691      * process can be killed if it runs on that host itself */
 692     action->state = SIMIX_FAILED;
 693   } else if (ws_model->action_state_get(action->execution.surf_exec) == SURF_ACTION_FAILED) {
 694     /* If the host running the action didn't fail, then the action was
 695      * canceled */
 696     action->state = SIMIX_CANCELED;
 697   } else {
 698     action->state = SIMIX_DONE;
 699   }
 700
 701   if (action->execution.surf_exec) {
 702     ws_model->action_unref(action->execution.surf_exec);
 703     action->execution.surf_exec = NULL;
 704   }
 705
 706   /* If there are simcalls associated with the action, then answer them */
 707   if (xbt_fifo_size(action->simcalls)) {
 708     SIMIX_execution_finish(action);
 709   }
 710 }
 711
 712
 713 #ifdef HAVE_TRACING
 714 void SIMIX_pre_set_category(smx_simcall_t simcall, smx_action_t action,
 715                             const char *category){
 716   SIMIX_set_category(action, category);
 717 }
 718 void SIMIX_set_category(smx_action_t action, const char *category)
 719 {
 720   surf_model_t ws_model = get_ws_model_from_action(action);
 721
 722   if (action->state != SIMIX_RUNNING) return;
 723   if (action->type == SIMIX_ACTION_EXECUTE){
 724     ws_model->set_category(action->execution.surf_exec, category);
 725   }else if (action->type == SIMIX_ACTION_COMMUNICATE){
 726     ws_model->set_category(action->comm.surf_comm, category);
 727   }
 728 }
 729 #endif
 730
 731
 732 /**
 733  * \brief Function to get the parameters of the given the SIMIX host.
 734  *
 735  * \param host the host to get_phys_host (a smx_host_t)
 736  * \param param the parameter object space to be overwritten (a ws_params_t)
 737  */
 738 void SIMIX_host_get_params(smx_host_t ind_vm, ws_params_t params)
 739 {
 740   /* jump to ws_get_params(). */
 741   surf_workstation_model->extension.workstation.get_params(ind_vm, params);
 742 }
 743
 744 void SIMIX_pre_host_get_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 745 {
 746   SIMIX_host_get_params(ind_vm, params);
 747 }
 748
 749 void SIMIX_host_set_params(smx_host_t ind_vm, ws_params_t params)
 750 {
 751   /* jump to ws_set_params(). */
 752   surf_workstation_model->extension.workstation.set_params(ind_vm, params);
 753 }
 754
 755 void SIMIX_pre_host_set_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 756 {
 757   SIMIX_host_set_params(ind_vm, params);
 758 }