src/simix/smx_host.c

   1 /* Copyright (c) 2007-2014. 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->process_list =
  32       xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
  33
  34   /* Update global variables */
  35   xbt_lib_set(host_lib,name,SIMIX_HOST_LEVEL,smx_host);
  36
  37   return xbt_lib_get_elm_or_null(host_lib, name);
  38 }
  39
  40 void SIMIX_pre_host_on(smx_simcall_t simcall, smx_host_t h)
  41 {
  42   SIMIX_host_on(h);
  43 }
  44
  45 /**
  46  * \brief Start the host if it is off
  47  *
  48  */
  49 void SIMIX_host_on(smx_host_t h)
  50 {
  51   smx_host_priv_t host = SIMIX_host_priv(h);
  52
  53   xbt_assert((host != NULL), "Invalid parameters");
  54
  55   if (surf_resource_get_state(surf_workstation_resource_priv(h))==SURF_RESOURCE_OFF) {
  56         surf_resource_set_state(surf_workstation_resource_priv(h), SURF_RESOURCE_ON);
  57     unsigned int cpt;
  58     smx_process_arg_t arg;
  59     xbt_dynar_foreach(host->boot_processes,cpt,arg) {
  60       smx_process_t process;
  61
  62       XBT_DEBUG("Booting Process %s(%s) right now", arg->argv[0], arg->hostname);
  63       if (simix_global->create_process_function) {
  64         simix_global->create_process_function(&process,
  65                                               arg->argv[0],
  66                                               arg->code,
  67                                               NULL,
  68                                               arg->hostname,
  69                                               arg->kill_time,
  70                                               arg->argc,
  71                                               arg->argv,
  72                                               arg->properties,
  73                                               arg->auto_restart);
  74       }
  75       else {
  76         simcall_process_create(&process,
  77                                               arg->argv[0],
  78                                               arg->code,
  79                                               NULL,
  80                                               arg->hostname,
  81                                               arg->kill_time,
  82                                               arg->argc,
  83                                               arg->argv,
  84                                               arg->properties,
  85                                               arg->auto_restart);
  86       }
  87     }
  88   }
  89 }
  90
  91 void SIMIX_pre_host_off(smx_simcall_t simcall, smx_host_t h)
  92 {
  93   SIMIX_host_off(h, simcall->issuer);
  94 }
  95
  96 /**
  97  * \brief Stop the host if it is on
  98  *
  99  */
 100 void SIMIX_host_off(smx_host_t h, smx_process_t issuer)
 101 {
 102   smx_host_priv_t host = SIMIX_host_priv(h);
 103
 104   xbt_assert((host != NULL), "Invalid parameters");
 105
 106   if (surf_resource_get_state(surf_workstation_resource_priv(h))==SURF_RESOURCE_ON) {
 107         surf_resource_set_state(surf_workstation_resource_priv(h), SURF_RESOURCE_OFF);
 108
 109     /* Clean Simulator data */
 110     if (xbt_swag_size(host->process_list) != 0) {
 111       smx_process_t process = NULL;
 112       xbt_swag_foreach(process, host->process_list) {
 113         SIMIX_process_kill(process, issuer);
 114         XBT_DEBUG("Killing %s on %s by %s", process->name,  sg_host_name(process->smx_host), issuer->name);
 115       }
 116     }
 117   }
 118 }
 119
 120 /**
 121  * \brief Internal function to destroy a SIMIX host.
 122  *
 123  * \param h the host to destroy (a smx_host_t)
 124  */
 125 void SIMIX_host_destroy(void *h)
 126 {
 127   smx_host_priv_t host = (smx_host_priv_t) h;
 128
 129   xbt_assert((host != NULL), "Invalid parameters");
 130
 131   /* Clean Simulator data */
 132   if (xbt_swag_size(host->process_list) != 0) {
 133     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
 134     char *tmp;
 135     smx_process_t process = NULL;
 136
 137     xbt_swag_foreach(process, host->process_list) {
 138       tmp = bprintf("%s\n\t%s", msg, process->name);
 139       free(msg);
 140       msg = tmp;
 141     }
 142     SIMIX_display_process_status();
 143     THROWF(arg_error, 0, "%s", msg);
 144   }
 145   xbt_dynar_free(&host->auto_restart_processes);
 146   xbt_dynar_free(&host->boot_processes);
 147   xbt_swag_free(host->process_list);
 148
 149   /* Clean host structure */
 150   free(host);
 151   return;
 152 }
 153
 154 ///**
 155 // * \brief Returns a dict of all hosts.
 156 // *
 157 // * \return List of all hosts (as a #xbt_dict_t)
 158 // */
 159 //xbt_dict_t SIMIX_host_get_dict(void)
 160 //{
 161 //  xbt_dict_t host_dict = xbt_dict_new_homogeneous(NULL);
 162 //  xbt_lib_cursor_t cursor = NULL;
 163 //  char *name = NULL;
 164 //  void **host = NULL;
 165 //
 166 //  xbt_lib_foreach(host_lib, cursor, name, host){
 167 //    if(host[SIMIX_HOST_LEVEL])
 168 //            xbt_dict_set(host_dict,name,host[SIMIX_HOST_LEVEL], NULL);
 169 //  }
 170 //  return host_dict;
 171 //}
 172 smx_host_t SIMIX_pre_host_get_by_name(smx_simcall_t simcall, const char *name){
 173    return SIMIX_host_get_by_name(name);
 174 }
 175 smx_host_t SIMIX_host_get_by_name(const char *name){
 176   xbt_assert(((simix_global != NULL)
 177                && (host_lib != NULL)),
 178               "Environment not set yet");
 179
 180   return xbt_lib_get_elm_or_null(host_lib, name);
 181 }
 182
 183 smx_host_t SIMIX_host_self(void)
 184 {
 185   smx_process_t process = SIMIX_process_self();
 186   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 187 }
 188
 189 const char* SIMIX_pre_host_self_get_name(smx_simcall_t simcall){
 190    return SIMIX_host_self_get_name();
 191 }
 192 /* needs to be public and without simcall because it is called
 193    by exceptions and logging events */
 194 const char* SIMIX_host_self_get_name(void)
 195 {
 196   smx_host_t host = SIMIX_host_self();
 197   if (host == NULL || SIMIX_process_self() == simix_global->maestro_process)
 198     return "";
 199
 200   return SIMIX_host_get_name(host);
 201 }
 202
 203 const char* SIMIX_pre_host_get_name(smx_simcall_t simcall, smx_host_t host){
 204    return SIMIX_host_get_name(host);
 205 }
 206 const char* SIMIX_host_get_name(smx_host_t host){
 207   xbt_assert((host != NULL), "Invalid parameters");
 208
 209   return sg_host_name(host);
 210 }
 211
 212 xbt_dict_t SIMIX_pre_host_get_properties(smx_simcall_t simcall, smx_host_t host){
 213   return SIMIX_host_get_properties(host);
 214 }
 215 xbt_dict_t SIMIX_host_get_properties(smx_host_t host){
 216   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 217
 218   return surf_resource_get_properties(surf_workstation_resource_priv(host));
 219 }
 220
 221 double SIMIX_pre_host_get_speed(smx_simcall_t simcall, smx_host_t host){
 222   return SIMIX_host_get_speed(host);
 223 }
 224 double SIMIX_host_get_speed(smx_host_t host){
 225   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 226   return surf_workstation_get_speed(host, 1.0);
 227 }
 228
 229 int SIMIX_pre_host_get_core(smx_simcall_t simcall, smx_host_t host){
 230   return SIMIX_host_get_core(host);
 231 }
 232 int SIMIX_host_get_core(smx_host_t host){
 233   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 234
 235   return surf_workstation_get_core(host);
 236 }
 237
 238 xbt_swag_t SIMIX_pre_host_get_process_list(smx_simcall_t simcall, smx_host_t host){
 239   return SIMIX_host_get_process_list(host);
 240 }
 241
 242 xbt_swag_t SIMIX_host_get_process_list(smx_host_t host){
 243   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 244   smx_host_priv_t host_priv = SIMIX_host_priv(host);
 245
 246   return host_priv->process_list;
 247 }
 248
 249
 250 double SIMIX_pre_host_get_available_speed(smx_simcall_t simcall, smx_host_t host){
 251   return SIMIX_host_get_available_speed(host);
 252 }
 253 double SIMIX_host_get_available_speed(smx_host_t host){
 254   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 255
 256   return surf_workstation_get_available_speed(host);
 257 }
 258
 259 double SIMIX_pre_host_get_current_power_peak(smx_simcall_t simcall, smx_host_t host){
 260   return SIMIX_host_get_current_power_peak(host);
 261 }
 262 double SIMIX_host_get_current_power_peak(smx_host_t host) {
 263           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 264           return surf_workstation_get_current_power_peak(host);
 265 }
 266
 267 double SIMIX_pre_host_get_power_peak_at(smx_simcall_t simcall, smx_host_t host, int pstate_index){
 268   return SIMIX_host_get_power_peak_at(host, pstate_index);
 269 }
 270 double SIMIX_host_get_power_peak_at(smx_host_t host, int pstate_index) {
 271           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 272
 273           return surf_workstation_get_power_peak_at(host, pstate_index);
 274 }
 275
 276 int SIMIX_pre_host_get_nb_pstates(smx_simcall_t simcall, smx_host_t host){
 277   return SIMIX_host_get_nb_pstates(host);
 278 }
 279 int SIMIX_host_get_nb_pstates(smx_host_t host) {
 280           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 281
 282           return surf_workstation_get_nb_pstates(host);
 283 }
 284
 285
 286 void SIMIX_pre_host_set_power_peak_at(smx_simcall_t simcall, smx_host_t host, int pstate_index){
 287   SIMIX_host_set_power_peak_at(host, pstate_index);
 288 }
 289 void SIMIX_host_set_power_peak_at(smx_host_t host, int pstate_index) {
 290           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 291
 292           surf_workstation_set_power_peak_at(host, pstate_index);
 293 }
 294
 295 double SIMIX_pre_host_get_consumed_energy(smx_simcall_t simcall, smx_host_t host){
 296   return SIMIX_host_get_consumed_energy(host);
 297 }
 298 double SIMIX_host_get_consumed_energy(smx_host_t host) {
 299           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 300           return surf_workstation_get_consumed_energy(host);
 301 }
 302
 303 int SIMIX_pre_host_get_state(smx_simcall_t simcall, smx_host_t host){
 304   return SIMIX_host_get_state(host);
 305 }
 306 int SIMIX_host_get_state(smx_host_t host){
 307   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 308
 309   return surf_resource_get_state(surf_workstation_resource_priv(host));
 310 }
 311
 312 void _SIMIX_host_free_process_arg(void *data)
 313 {
 314   smx_process_arg_t arg = *(void**)data;
 315   int i;
 316   for (i = 0; i < arg->argc; i++)
 317     xbt_free(arg->argv[i]);
 318   xbt_free(arg->argv);
 319   xbt_free(arg->name);
 320   xbt_free(arg);
 321 }
 322 /**
 323  * \brief Add a process to the list of the processes that the host will restart when it comes back
 324  * This function add a process to the list of the processes that will be restarted when the host comes
 325  * back. It is expected that this function is called when the host is down.
 326  * The processes will only be restarted once, meaning that you will have to register the process
 327  * again to restart the process again.
 328  */
 329 void SIMIX_host_add_auto_restart_process(smx_host_t host,
 330                                          const char *name,
 331                                          xbt_main_func_t code,
 332                                          void *data,
 333                                          const char *hostname,
 334                                          double kill_time,
 335                                          int argc, char **argv,
 336                                          xbt_dict_t properties,
 337                                          int auto_restart)
 338 {
 339   if (!SIMIX_host_priv(host)->auto_restart_processes) {
 340     SIMIX_host_priv(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 341   }
 342   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 343   arg->name = xbt_strdup(name);
 344   arg->code = code;
 345   arg->data = data;
 346   arg->hostname = hostname;
 347   arg->kill_time = kill_time;
 348   arg->argc = argc;
 349
 350   arg->argv = xbt_new(char*,argc + 1);
 351
 352   int i;
 353   for (i = 0; i < argc; i++) {
 354     arg->argv[i] = xbt_strdup(argv[i]);
 355   }
 356   arg->argv[argc] = NULL;
 357
 358   arg->properties = properties;
 359   arg->auto_restart = auto_restart;
 360
 361   if( SIMIX_host_get_state(host) == SURF_RESOURCE_OFF
 362       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_name(host))){
 363     xbt_dict_set(watched_hosts_lib,sg_host_name(host),host,NULL);
 364     XBT_DEBUG("Have pushed host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_name(host));
 365   }
 366   xbt_dynar_push_as(SIMIX_host_priv(host)->auto_restart_processes,smx_process_arg_t,arg);
 367 }
 368 /**
 369  * \brief Restart the list of processes that have been registered to the host
 370  */
 371 void SIMIX_host_restart_processes(smx_host_t host)
 372 {
 373   unsigned int cpt;
 374   smx_process_arg_t arg;
 375   xbt_dynar_t process_list = SIMIX_host_priv(host)->auto_restart_processes;
 376   if (!process_list)
 377     return;
 378
 379   xbt_dynar_foreach (process_list, cpt, arg) {
 380
 381     smx_process_t process;
 382
 383     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 384     if (simix_global->create_process_function) {
 385       simix_global->create_process_function(&process,
 386                                             arg->argv[0],
 387                                             arg->code,
 388                                             NULL,
 389                                             arg->hostname,
 390                                             arg->kill_time,
 391                                             arg->argc,
 392                                             arg->argv,
 393                                             arg->properties,
 394                                             arg->auto_restart);
 395     } else {
 396       simcall_process_create(&process,
 397                              arg->argv[0],
 398                              arg->code,
 399                              NULL,
 400                              arg->hostname,
 401                              arg->kill_time,
 402                              arg->argc,
 403                              arg->argv,
 404                              arg->properties,
 405                              arg->auto_restart);
 406
 407     }
 408     /* arg->argv is used by the process created above.  Hide it to
 409      * _SIMIX_host_free_process_arg() which is called by xbt_dynar_reset()
 410      * below. */
 411     arg->argc = 0;
 412     arg->argv = NULL;
 413   }
 414   xbt_dynar_reset(process_list);
 415 }
 416
 417 void SIMIX_host_autorestart(smx_host_t host)
 418 {
 419   if(simix_global->autorestart)
 420     simix_global->autorestart(host);
 421   else
 422     xbt_die("No function for simix_global->autorestart");
 423 }
 424
 425 smx_action_t SIMIX_pre_host_execute(smx_simcall_t simcall,const char *name,
 426     smx_host_t host, double computation_amount, double priority, double bound, unsigned long affinity_mask){
 427   return SIMIX_host_execute(name, host, computation_amount, priority, bound, affinity_mask);
 428 }
 429 smx_action_t SIMIX_host_execute(const char *name,
 430     smx_host_t host, double computation_amount, double priority, double bound, unsigned long affinity_mask){
 431
 432   /* alloc structures and initialize */
 433   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 434   action->type = SIMIX_ACTION_EXECUTE;
 435   action->name = xbt_strdup(name);
 436   action->state = SIMIX_RUNNING;
 437   action->execution.host = host;
 438
 439 #ifdef HAVE_TRACING
 440   action->category = NULL;
 441 #endif
 442
 443   /* set surf's action */
 444   if (!MC_is_active()) {
 445
 446     action->execution.surf_exec = surf_workstation_execute(host, computation_amount);
 447     surf_action_set_data(action->execution.surf_exec, action);
 448     surf_action_set_priority(action->execution.surf_exec, priority);
 449
 450     /* Note (hypervisor): for multicore, the bound value being passed to the
 451      * surf layer should not be zero (i.e., unlimited). It should be the
 452      * capacity of a CPU core. */
 453     if (bound == 0)
 454       surf_cpu_action_set_bound(action->execution.surf_exec, SIMIX_host_get_speed(host));
 455     else
 456       surf_cpu_action_set_bound(action->execution.surf_exec, bound);
 457
 458     if (affinity_mask != 0) {
 459       /* just a double check to confirm that this host is the host where this task is running. */
 460       xbt_assert(action->execution.host == host);
 461       surf_cpu_action_set_affinity(action->execution.surf_exec, host, affinity_mask);
 462     }
 463   }
 464
 465   XBT_DEBUG("Create execute action %p", action);
 466
 467   return action;
 468 }
 469
 470 smx_action_t SIMIX_pre_host_parallel_execute(smx_simcall_t simcall, const char *name,
 471     int host_nb, smx_host_t *host_list,
 472     double *computation_amount, double *communication_amount,
 473     double amount, double rate){
 474   return SIMIX_host_parallel_execute(name, host_nb, host_list, computation_amount,
 475                                      communication_amount, amount, rate);
 476 }
 477 smx_action_t SIMIX_host_parallel_execute(const char *name,
 478     int host_nb, smx_host_t *host_list,
 479     double *computation_amount, double *communication_amount,
 480     double amount, double rate){
 481
 482   void **workstation_list = NULL;
 483   int i;
 484
 485   /* alloc structures and initialize */
 486   smx_action_t action = xbt_mallocator_get(simix_global->action_mallocator);
 487   action->type = SIMIX_ACTION_PARALLEL_EXECUTE;
 488   action->name = xbt_strdup(name);
 489   action->state = SIMIX_RUNNING;
 490   action->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 491
 492 #ifdef HAVE_TRACING
 493   action->category = NULL;
 494 #endif
 495
 496   /* set surf's action */
 497   workstation_list = xbt_new0(void *, host_nb);
 498   for (i = 0; i < host_nb; i++)
 499     workstation_list[i] = surf_workstation_resource_priv(host_list[i]);
 500
 501
 502   /* FIXME: what happens if host_list contains VMs and PMs. If
 503    * execute_parallel_task() does not change the state of the model, we can mix
 504    * them. */
 505   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_WKS_LEVEL);
 506   for (i = 1; i < host_nb; i++) {
 507     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_WKS_LEVEL);
 508     if (ws_model_tmp != ws_model) {
 509       XBT_CRITICAL("mixing VMs and PMs is not supported");
 510       DIE_IMPOSSIBLE;
 511     }
 512   }
 513
 514   /* set surf's action */
 515   if (!MC_is_active()) {
 516     action->execution.surf_exec =
 517       surf_workstation_model_execute_parallel_task((surf_workstation_model_t)surf_workstation_model,
 518                   host_nb, workstation_list, computation_amount, communication_amount, rate);
 519
 520     surf_action_set_data(action->execution.surf_exec, action);
 521   }
 522   XBT_DEBUG("Create parallel execute action %p", action);
 523
 524   return action;
 525 }
 526
 527 //FIXME: REMOVE not used
 528 static surf_model_t get_ws_model_from_action(smx_action_t action)
 529 {
 530   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 531   smx_host_t host = action->execution.host;
 532   surf_model_t model = surf_resource_model(host, SURF_WKS_LEVEL);
 533   return model;
 534 }
 535
 536 void SIMIX_pre_host_execution_destroy(smx_simcall_t simcall, smx_action_t action){
 537   SIMIX_host_execution_destroy(action);
 538 }
 539 void SIMIX_host_execution_destroy(smx_action_t action){
 540   XBT_DEBUG("Destroy action %p", action);
 541
 542   if (action->execution.surf_exec) {
 543     surf_action_unref(action->execution.surf_exec);
 544     action->execution.surf_exec = NULL;
 545   }
 546   xbt_free(action->name);
 547   xbt_mallocator_release(simix_global->action_mallocator, action);
 548 }
 549
 550 void SIMIX_pre_host_execution_cancel(smx_simcall_t simcall, smx_action_t action){
 551   SIMIX_host_execution_cancel(action);
 552 }
 553 void SIMIX_host_execution_cancel(smx_action_t action){
 554   XBT_DEBUG("Cancel action %p", action);
 555
 556   if (action->execution.surf_exec)
 557     surf_action_cancel(action->execution.surf_exec);
 558 }
 559
 560 double SIMIX_pre_host_execution_get_remains(smx_simcall_t simcall, smx_action_t action){
 561   return SIMIX_host_execution_get_remains(action);
 562 }
 563 double SIMIX_host_execution_get_remains(smx_action_t action){
 564   double result = 0.0;
 565
 566   if (action->state == SIMIX_RUNNING)
 567     result = surf_action_get_remains(action->execution.surf_exec);
 568
 569   return result;
 570 }
 571
 572 e_smx_state_t SIMIX_pre_host_execution_get_state(smx_simcall_t simcall, smx_action_t action){
 573   return SIMIX_host_execution_get_state(action);
 574 }
 575 e_smx_state_t SIMIX_host_execution_get_state(smx_action_t action){
 576   return action->state;
 577 }
 578
 579 void SIMIX_pre_host_execution_set_priority(smx_simcall_t simcall, smx_action_t action,
 580                                         double priority){
 581   SIMIX_host_execution_set_priority(action, priority);
 582 }
 583 void SIMIX_host_execution_set_priority(smx_action_t action, double priority){
 584
 585   if(action->execution.surf_exec)
 586         surf_action_set_priority(action->execution.surf_exec, priority);
 587 }
 588
 589 void SIMIX_pre_host_execution_set_bound(smx_simcall_t simcall, smx_action_t action,
 590                                         double bound){
 591   SIMIX_host_execution_set_bound(action, bound);
 592 }
 593 void SIMIX_host_execution_set_bound(smx_action_t action, double bound){
 594
 595   if(action->execution.surf_exec)
 596         surf_cpu_action_set_bound(action->execution.surf_exec, bound);
 597 }
 598
 599 void SIMIX_pre_host_execution_set_affinity(smx_simcall_t simcall,
 600     smx_action_t action, smx_host_t host, unsigned long mask){
 601   SIMIX_host_execution_set_affinity(action, host, mask);
 602 }
 603 void SIMIX_host_execution_set_affinity(smx_action_t action, smx_host_t host, unsigned long mask){
 604   xbt_assert(action->type == SIMIX_ACTION_EXECUTE);
 605
 606   if (action->execution.surf_exec) {
 607     /* just a double check to confirm that this host is the host where this task is running. */
 608     xbt_assert(action->execution.host == host);
 609     surf_cpu_action_set_affinity(action->execution.surf_exec, host, mask);
 610   }
 611 }
 612
 613 void SIMIX_pre_host_execution_wait(smx_simcall_t simcall, smx_action_t action){
 614
 615   XBT_DEBUG("Wait for execution of action %p, state %d", action, (int)action->state);
 616
 617   /* Associate this simcall to the action */
 618   xbt_fifo_push(action->simcalls, simcall);
 619   simcall->issuer->waiting_action = action;
 620
 621   /* set surf's action */
 622   if (MC_is_active()) {
 623     action->state = SIMIX_DONE;
 624     SIMIX_execution_finish(action);
 625     return;
 626   }
 627
 628   /* If the action is already finished then perform the error handling */
 629   if (action->state != SIMIX_RUNNING)
 630     SIMIX_execution_finish(action);
 631 }
 632
 633 void SIMIX_host_execution_suspend(smx_action_t action)
 634 {
 635   if(action->execution.surf_exec)
 636     surf_action_suspend(action->execution.surf_exec);
 637 }
 638
 639 void SIMIX_host_execution_resume(smx_action_t action)
 640 {
 641   if(action->execution.surf_exec)
 642     surf_action_resume(action->execution.surf_exec);
 643 }
 644
 645 void SIMIX_execution_finish(smx_action_t action)
 646 {
 647   xbt_fifo_item_t item;
 648   smx_simcall_t simcall;
 649
 650   xbt_fifo_foreach(action->simcalls, item, simcall, smx_simcall_t) {
 651
 652     switch (action->state) {
 653
 654       case SIMIX_DONE:
 655         /* do nothing, action done */
 656   XBT_DEBUG("SIMIX_execution_finished: execution successful");
 657         break;
 658
 659       case SIMIX_FAILED:
 660         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_name(simcall->issuer->smx_host));
 661         simcall->issuer->context->iwannadie = 1;
 662         SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 663         break;
 664
 665       case SIMIX_CANCELED:
 666         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 667         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 668         break;
 669
 670       default:
 671         xbt_die("Internal error in SIMIX_execution_finish: unexpected action state %d",
 672             (int)action->state);
 673     }
 674     /* check if the host is down */
 675     if (surf_resource_get_state(surf_workstation_resource_priv(simcall->issuer->smx_host)) != SURF_RESOURCE_ON) {
 676       simcall->issuer->context->iwannadie = 1;
 677     }
 678
 679     simcall->issuer->waiting_action =    NULL;
 680     simcall_host_execution_wait__set__result(simcall, action->state);
 681     SIMIX_simcall_answer(simcall);
 682   }
 683
 684   /* We no longer need it */
 685   SIMIX_host_execution_destroy(action);
 686 }
 687
 688
 689 void SIMIX_post_host_execute(smx_action_t action)
 690 {
 691   if (action->type == SIMIX_ACTION_EXECUTE && /* FIMXE: handle resource failure
 692                                                * for parallel tasks too */
 693       surf_resource_get_state(surf_workstation_resource_priv(action->execution.host)) == SURF_RESOURCE_OFF) {
 694     /* If the host running the action failed, notice it so that the asking
 695      * process can be killed if it runs on that host itself */
 696     action->state = SIMIX_FAILED;
 697   } else if (surf_action_get_state(action->execution.surf_exec) == SURF_ACTION_FAILED) {
 698     /* If the host running the action didn't fail, then the action was
 699      * canceled */
 700     action->state = SIMIX_CANCELED;
 701   } else {
 702     action->state = SIMIX_DONE;
 703   }
 704
 705   if (action->execution.surf_exec) {
 706     surf_action_unref(action->execution.surf_exec);
 707     action->execution.surf_exec = NULL;
 708   }
 709
 710   /* If there are simcalls associated with the action, then answer them */
 711   if (xbt_fifo_size(action->simcalls)) {
 712     SIMIX_execution_finish(action);
 713   }
 714 }
 715
 716
 717 #ifdef HAVE_TRACING
 718 void SIMIX_pre_set_category(smx_simcall_t simcall, smx_action_t action,
 719                             const char *category){
 720   SIMIX_set_category(action, category);
 721 }
 722 void SIMIX_set_category(smx_action_t action, const char *category)
 723 {
 724   if (action->state != SIMIX_RUNNING) return;
 725   if (action->type == SIMIX_ACTION_EXECUTE){
 726     surf_action_set_category(action->execution.surf_exec, category);
 727   }else if (action->type == SIMIX_ACTION_COMMUNICATE){
 728     surf_action_set_category(action->comm.surf_comm, category);
 729   }
 730 }
 731 #endif
 732
 733 /**
 734  * \brief Function to get the parameters of the given the SIMIX host.
 735  *
 736  * \param host the host to get_phys_host (a smx_host_t)
 737  * \param param the parameter object space to be overwritten (a ws_params_t)
 738  */
 739 void SIMIX_host_get_params(smx_host_t ind_vm, ws_params_t params)
 740 {
 741   /* jump to ws_get_params(). */
 742   surf_workstation_get_params(ind_vm, params);
 743 }
 744
 745 void SIMIX_pre_host_get_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 746 {
 747   SIMIX_host_get_params(ind_vm, params);
 748 }
 749
 750 void SIMIX_host_set_params(smx_host_t ind_vm, ws_params_t params)
 751 {
 752   /* jump to ws_set_params(). */
 753   surf_workstation_set_params(ind_vm, params);
 754 }
 755
 756 void SIMIX_pre_host_set_params(smx_simcall_t simcall, smx_host_t ind_vm, ws_params_t params)
 757 {
 758   SIMIX_host_set_params(ind_vm, params);
 759 }
 760
 761 xbt_dict_t SIMIX_pre_host_get_mounted_storage_list(smx_simcall_t simcall, smx_host_t host){
 762   return SIMIX_host_get_mounted_storage_list(host);
 763 }
 764
 765 xbt_dict_t SIMIX_host_get_mounted_storage_list(smx_host_t host){
 766   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 767
 768   return surf_workstation_get_mounted_storage_list(host);
 769 }
 770
 771 xbt_dict_t SIMIX_pre_host_get_attached_storage_list(smx_simcall_t simcall, smx_host_t host){
 772   return SIMIX_host_get_attached_storage_list(host);
 773 }
 774
 775 xbt_dict_t SIMIX_host_get_attached_storage_list(smx_host_t host){
 776   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 777
 778   return surf_workstation_get_attached_storage_list(host);
 779 }