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                                 "SIMIX hosts");
  15
  16 static void SIMIX_execution_finish(smx_synchro_t synchro);
  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 /**
  41  * \brief Start the host if it is off
  42  *
  43  */
  44 void SIMIX_host_on(smx_host_t h)
  45 {
  46   smx_host_priv_t host = SIMIX_host_priv(h);
  47
  48   xbt_assert((host != NULL), "Invalid parameters");
  49
  50   if (surf_resource_get_state(surf_workstation_resource_priv(h))==SURF_RESOURCE_OFF) {
  51     surf_resource_set_state(surf_workstation_resource_priv(h), SURF_RESOURCE_ON);
  52
  53     unsigned int cpt;
  54     smx_process_arg_t arg;
  55     xbt_dynar_foreach(host->boot_processes,cpt,arg) {
  56       smx_process_t process;
  57
  58       char** argv = xbt_new(char*, arg->argc);
  59       for (int i=0; i<arg->argc; i++)
  60         argv[i] = xbt_strdup(arg->argv[i]);
  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                                               argv[0],
  66                                               arg->code,
  67                                               NULL,
  68                                               arg->hostname,
  69                                               arg->kill_time,
  70                                               arg->argc,
  71                                               argv,
  72                                               arg->properties,
  73                                               arg->auto_restart,
  74                                               NULL);
  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                                argv,
  84                                arg->properties,
  85                                arg->auto_restart);
  86       }
  87     }
  88   }
  89 }
  90
  91 void simcall_HANDLER_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 smx_host_t SIMIX_host_get_by_name(const char *name){
 155   xbt_assert(((simix_global != NULL)
 156                && (host_lib != NULL)),
 157               "Environment not set yet");
 158
 159   return xbt_lib_get_elm_or_null(host_lib, name);
 160 }
 161
 162 smx_host_t SIMIX_host_self(void)
 163 {
 164   smx_process_t process = SIMIX_process_self();
 165   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 166 }
 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_host_get_name(smx_host_t host){
 180   xbt_assert((host != NULL), "Invalid parameters");
 181
 182   return sg_host_name(host);
 183 }
 184
 185 xbt_dict_t SIMIX_host_get_properties(smx_host_t host){
 186   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 187
 188   return surf_resource_get_properties(surf_workstation_resource_priv(host));
 189 }
 190
 191 double SIMIX_host_get_speed(smx_host_t host){
 192   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 193   return surf_workstation_get_speed(host, 1.0);
 194 }
 195
 196 int SIMIX_host_get_core(smx_host_t host){
 197   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 198
 199   return surf_workstation_get_core(host);
 200 }
 201
 202 xbt_swag_t SIMIX_host_get_process_list(smx_host_t host){
 203   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 204   smx_host_priv_t host_priv = SIMIX_host_priv(host);
 205
 206   return host_priv->process_list;
 207 }
 208
 209
 210 double SIMIX_host_get_available_speed(smx_host_t host){
 211   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 212
 213   return surf_workstation_get_available_speed(host);
 214 }
 215
 216 double SIMIX_host_get_current_power_peak(smx_host_t host) {
 217           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 218           return surf_workstation_get_current_power_peak(host);
 219 }
 220
 221 double SIMIX_host_get_power_peak_at(smx_host_t host, int pstate_index) {
 222           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 223
 224           return surf_workstation_get_power_peak_at(host, pstate_index);
 225 }
 226
 227 int SIMIX_host_get_nb_pstates(smx_host_t host) {
 228           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 229
 230           return surf_workstation_get_nb_pstates(host);
 231 }
 232
 233
 234 void SIMIX_host_set_power_peak_at(smx_host_t host, int pstate_index) {
 235           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 236
 237           surf_workstation_set_power_peak_at(host, pstate_index);
 238 }
 239
 240 double SIMIX_host_get_consumed_energy(smx_host_t host) {
 241           xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 242           return surf_workstation_get_consumed_energy(host);
 243 }
 244
 245 int SIMIX_host_get_state(smx_host_t host){
 246   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 247
 248   return surf_resource_get_state(surf_workstation_resource_priv(host));
 249 }
 250
 251 void _SIMIX_host_free_process_arg(void *data)
 252 {
 253   smx_process_arg_t arg = *(void**)data;
 254   int i;
 255   for (i = 0; i < arg->argc; i++)
 256     xbt_free(arg->argv[i]);
 257   xbt_free(arg->argv);
 258   xbt_free(arg->name);
 259   xbt_free(arg);
 260 }
 261 /**
 262  * \brief Add a process to the list of the processes that the host will restart when it comes back
 263  * This function add a process to the list of the processes that will be restarted when the host comes
 264  * back. It is expected that this function is called when the host is down.
 265  * The processes will only be restarted once, meaning that you will have to register the process
 266  * again to restart the process again.
 267  */
 268 void SIMIX_host_add_auto_restart_process(smx_host_t host,
 269                                          const char *name,
 270                                          xbt_main_func_t code,
 271                                          void *data,
 272                                          const char *hostname,
 273                                          double kill_time,
 274                                          int argc, char **argv,
 275                                          xbt_dict_t properties,
 276                                          int auto_restart)
 277 {
 278   if (!SIMIX_host_priv(host)->auto_restart_processes) {
 279     SIMIX_host_priv(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 280   }
 281   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 282   arg->name = xbt_strdup(name);
 283   arg->code = code;
 284   arg->data = data;
 285   arg->hostname = hostname;
 286   arg->kill_time = kill_time;
 287   arg->argc = argc;
 288
 289   arg->argv = xbt_new(char*,argc + 1);
 290
 291   int i;
 292   for (i = 0; i < argc; i++) {
 293     arg->argv[i] = xbt_strdup(argv[i]);
 294   }
 295   arg->argv[argc] = NULL;
 296
 297   arg->properties = properties;
 298   arg->auto_restart = auto_restart;
 299
 300   if( SIMIX_host_get_state(host) == SURF_RESOURCE_OFF
 301       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_name(host))){
 302     xbt_dict_set(watched_hosts_lib,sg_host_name(host),host,NULL);
 303     XBT_DEBUG("Have pushed host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_name(host));
 304   }
 305   xbt_dynar_push_as(SIMIX_host_priv(host)->auto_restart_processes,smx_process_arg_t,arg);
 306 }
 307 /**
 308  * \brief Restart the list of processes that have been registered to the host
 309  */
 310 void SIMIX_host_restart_processes(smx_host_t host)
 311 {
 312   unsigned int cpt;
 313   smx_process_arg_t arg;
 314   xbt_dynar_t process_list = SIMIX_host_priv(host)->auto_restart_processes;
 315   if (!process_list)
 316     return;
 317
 318   xbt_dynar_foreach (process_list, cpt, arg) {
 319
 320     smx_process_t process;
 321
 322     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 323     if (simix_global->create_process_function) {
 324       simix_global->create_process_function(&process,
 325                                             arg->argv[0],
 326                                             arg->code,
 327                                             NULL,
 328                                             arg->hostname,
 329                                             arg->kill_time,
 330                                             arg->argc,
 331                                             arg->argv,
 332                                             arg->properties,
 333                                             arg->auto_restart,
 334                                             NULL);
 335     } else {
 336       simcall_process_create(&process,
 337                              arg->argv[0],
 338                              arg->code,
 339                              NULL,
 340                              arg->hostname,
 341                              arg->kill_time,
 342                              arg->argc,
 343                              arg->argv,
 344                              arg->properties,
 345                              arg->auto_restart);
 346
 347     }
 348     /* arg->argv is used by the process created above.  Hide it to
 349      * _SIMIX_host_free_process_arg() which is called by xbt_dynar_reset()
 350      * below. */
 351     arg->argc = 0;
 352     arg->argv = NULL;
 353   }
 354   xbt_dynar_reset(process_list);
 355 }
 356
 357 void SIMIX_host_autorestart(smx_host_t host)
 358 {
 359   if(simix_global->autorestart)
 360     simix_global->autorestart(host);
 361   else
 362     xbt_die("No function for simix_global->autorestart");
 363 }
 364
 365 smx_synchro_t SIMIX_host_execute(const char *name,
 366     smx_host_t host, double flops_amount, double priority, double bound, unsigned long affinity_mask){
 367
 368   /* alloc structures and initialize */
 369   smx_synchro_t synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
 370   synchro->type = SIMIX_SYNC_EXECUTE;
 371   synchro->name = xbt_strdup(name);
 372   synchro->state = SIMIX_RUNNING;
 373   synchro->execution.host = host;
 374
 375 #ifdef HAVE_TRACING
 376   synchro->category = NULL;
 377 #endif
 378
 379   /* set surf's action */
 380   if (!MC_is_active() && !MC_record_replay_is_active()) {
 381
 382     synchro->execution.surf_exec = surf_workstation_execute(host, flops_amount);
 383     surf_action_set_data(synchro->execution.surf_exec, synchro);
 384     surf_action_set_priority(synchro->execution.surf_exec, priority);
 385
 386     /* Note (hypervisor): for multicore, the bound value being passed to the
 387      * surf layer should not be zero (i.e., unlimited). It should be the
 388      * capacity of a CPU core. */
 389     if (bound == 0)
 390       surf_cpu_action_set_bound(synchro->execution.surf_exec, SIMIX_host_get_speed(host));
 391     else
 392       surf_cpu_action_set_bound(synchro->execution.surf_exec, bound);
 393
 394     if (affinity_mask != 0) {
 395       /* just a double check to confirm that this host is the host where this task is running. */
 396       xbt_assert(synchro->execution.host == host);
 397       surf_cpu_action_set_affinity(synchro->execution.surf_exec, host, affinity_mask);
 398     }
 399   }
 400
 401   XBT_DEBUG("Create execute synchro %p: %s", synchro, synchro->name);
 402
 403   return synchro;
 404 }
 405
 406 smx_synchro_t SIMIX_host_parallel_execute(const char *name,
 407     int host_nb, smx_host_t *host_list,
 408     double *flops_amount, double *bytes_amount,
 409     double amount, double rate){
 410
 411   void **workstation_list = NULL;
 412   int i;
 413
 414   /* alloc structures and initialize */
 415   smx_synchro_t synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
 416   synchro->type = SIMIX_SYNC_PARALLEL_EXECUTE;
 417   synchro->name = xbt_strdup(name);
 418   synchro->state = SIMIX_RUNNING;
 419   synchro->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 420
 421 #ifdef HAVE_TRACING
 422   synchro->category = NULL;
 423 #endif
 424
 425   /* set surf's synchro */
 426   workstation_list = xbt_new0(void *, host_nb);
 427   for (i = 0; i < host_nb; i++)
 428     workstation_list[i] = surf_workstation_resource_priv(host_list[i]);
 429
 430
 431   /* FIXME: what happens if host_list contains VMs and PMs. If
 432    * execute_parallel_task() does not change the state of the model, we can mix
 433    * them. */
 434   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_WKS_LEVEL);
 435   for (i = 1; i < host_nb; i++) {
 436     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_WKS_LEVEL);
 437     if (ws_model_tmp != ws_model) {
 438       XBT_CRITICAL("mixing VMs and PMs is not supported");
 439       DIE_IMPOSSIBLE;
 440     }
 441   }
 442
 443   /* set surf's synchro */
 444   if (!MC_is_active() && !MC_record_replay_is_active()) {
 445     synchro->execution.surf_exec =
 446       surf_workstation_model_execute_parallel_task((surf_workstation_model_t)surf_workstation_model,
 447                   host_nb, workstation_list, flops_amount, bytes_amount, rate);
 448
 449     surf_action_set_data(synchro->execution.surf_exec, synchro);
 450   }
 451   XBT_DEBUG("Create parallel execute synchro %p", synchro);
 452
 453   return synchro;
 454 }
 455
 456 void SIMIX_host_execution_destroy(smx_synchro_t synchro){
 457   XBT_DEBUG("Destroy synchro %p", synchro);
 458
 459   if (synchro->execution.surf_exec) {
 460     surf_action_unref(synchro->execution.surf_exec);
 461     synchro->execution.surf_exec = NULL;
 462   }
 463   xbt_free(synchro->name);
 464   xbt_mallocator_release(simix_global->synchro_mallocator, synchro);
 465 }
 466
 467 void SIMIX_host_execution_cancel(smx_synchro_t synchro){
 468   XBT_DEBUG("Cancel synchro %p", synchro);
 469
 470   if (synchro->execution.surf_exec)
 471     surf_action_cancel(synchro->execution.surf_exec);
 472 }
 473
 474 double SIMIX_host_execution_get_remains(smx_synchro_t synchro){
 475   double result = 0.0;
 476
 477   if (synchro->state == SIMIX_RUNNING)
 478     result = surf_action_get_remains(synchro->execution.surf_exec);
 479
 480   return result;
 481 }
 482
 483 e_smx_state_t SIMIX_host_execution_get_state(smx_synchro_t synchro){
 484   return synchro->state;
 485 }
 486
 487 void SIMIX_host_execution_set_priority(smx_synchro_t synchro, double priority){
 488
 489   if(synchro->execution.surf_exec)
 490         surf_action_set_priority(synchro->execution.surf_exec, priority);
 491 }
 492
 493 void SIMIX_host_execution_set_bound(smx_synchro_t synchro, double bound){
 494
 495   if(synchro->execution.surf_exec)
 496         surf_cpu_action_set_bound(synchro->execution.surf_exec, bound);
 497 }
 498
 499 void SIMIX_host_execution_set_affinity(smx_synchro_t synchro, smx_host_t host, unsigned long mask){
 500   xbt_assert(synchro->type == SIMIX_SYNC_EXECUTE);
 501
 502   if (synchro->execution.surf_exec) {
 503     /* just a double check to confirm that this host is the host where this task is running. */
 504     xbt_assert(synchro->execution.host == host);
 505     surf_cpu_action_set_affinity(synchro->execution.surf_exec, host, mask);
 506   }
 507 }
 508
 509 void simcall_HANDLER_host_execution_wait(smx_simcall_t simcall, smx_synchro_t synchro){
 510
 511   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro, (int)synchro->state);
 512
 513   /* Associate this simcall to the synchro */
 514   xbt_fifo_push(synchro->simcalls, simcall);
 515   simcall->issuer->waiting_synchro = synchro;
 516
 517   /* set surf's synchro */
 518   if (MC_is_active() || MC_record_replay_is_active()) {
 519     synchro->state = SIMIX_DONE;
 520     SIMIX_execution_finish(synchro);
 521     return;
 522   }
 523
 524   /* If the synchro is already finished then perform the error handling */
 525   if (synchro->state != SIMIX_RUNNING)
 526     SIMIX_execution_finish(synchro);
 527 }
 528
 529 void SIMIX_host_execution_suspend(smx_synchro_t synchro)
 530 {
 531   if(synchro->execution.surf_exec)
 532     surf_action_suspend(synchro->execution.surf_exec);
 533 }
 534
 535 void SIMIX_host_execution_resume(smx_synchro_t synchro)
 536 {
 537   if(synchro->execution.surf_exec)
 538     surf_action_resume(synchro->execution.surf_exec);
 539 }
 540
 541 void SIMIX_execution_finish(smx_synchro_t synchro)
 542 {
 543   xbt_fifo_item_t item;
 544   smx_simcall_t simcall;
 545
 546   xbt_fifo_foreach(synchro->simcalls, item, simcall, smx_simcall_t) {
 547
 548     switch (synchro->state) {
 549
 550       case SIMIX_DONE:
 551         /* do nothing, synchro done */
 552         XBT_DEBUG("SIMIX_execution_finished: execution successful");
 553         break;
 554
 555       case SIMIX_FAILED:
 556         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_name(simcall->issuer->smx_host));
 557         simcall->issuer->context->iwannadie = 1;
 558         SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 559         break;
 560
 561       case SIMIX_CANCELED:
 562         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 563         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 564         break;
 565
 566       default:
 567         xbt_die("Internal error in SIMIX_execution_finish: unexpected synchro state %d",
 568             (int)synchro->state);
 569     }
 570     /* check if the host is down */
 571     if (surf_resource_get_state(surf_workstation_resource_priv(simcall->issuer->smx_host)) != SURF_RESOURCE_ON) {
 572       simcall->issuer->context->iwannadie = 1;
 573     }
 574
 575     simcall->issuer->waiting_synchro =    NULL;
 576     simcall_host_execution_wait__set__result(simcall, synchro->state);
 577     SIMIX_simcall_answer(simcall);
 578   }
 579
 580   /* We no longer need it */
 581   SIMIX_host_execution_destroy(synchro);
 582 }
 583
 584
 585 void SIMIX_post_host_execute(smx_synchro_t synchro)
 586 {
 587   if (synchro->type == SIMIX_SYNC_EXECUTE && /* FIMXE: handle resource failure
 588                                                * for parallel tasks too */
 589       surf_resource_get_state(surf_workstation_resource_priv(synchro->execution.host)) == SURF_RESOURCE_OFF) {
 590     /* If the host running the synchro failed, notice it so that the asking
 591      * process can be killed if it runs on that host itself */
 592     synchro->state = SIMIX_FAILED;
 593   } else if (surf_action_get_state(synchro->execution.surf_exec) == SURF_ACTION_FAILED) {
 594     /* If the host running the synchro didn't fail, then the synchro was
 595      * canceled */
 596     synchro->state = SIMIX_CANCELED;
 597   } else {
 598     synchro->state = SIMIX_DONE;
 599   }
 600
 601   if (synchro->execution.surf_exec) {
 602     surf_action_unref(synchro->execution.surf_exec);
 603     synchro->execution.surf_exec = NULL;
 604   }
 605
 606   /* If there are simcalls associated with the synchro, then answer them */
 607   if (xbt_fifo_size(synchro->simcalls)) {
 608     SIMIX_execution_finish(synchro);
 609   }
 610 }
 611
 612
 613 #ifdef HAVE_TRACING
 614 void SIMIX_set_category(smx_synchro_t synchro, const char *category)
 615 {
 616   if (synchro->state != SIMIX_RUNNING) return;
 617   if (synchro->type == SIMIX_SYNC_EXECUTE){
 618     surf_action_set_category(synchro->execution.surf_exec, category);
 619   }else if (synchro->type == SIMIX_SYNC_COMMUNICATE){
 620     surf_action_set_category(synchro->comm.surf_comm, category);
 621   }
 622 }
 623 #endif
 624
 625 /**
 626  * \brief Function to get the parameters of the given the SIMIX host.
 627  *
 628  * \param host the host to get_phys_host (a smx_host_t)
 629  * \param param the parameter object space to be overwritten (a ws_params_t)
 630  */
 631 void SIMIX_host_get_params(smx_host_t ind_vm, ws_params_t params)
 632 {
 633   /* jump to ws_get_params(). */
 634   surf_workstation_get_params(ind_vm, params);
 635 }
 636
 637 void SIMIX_host_set_params(smx_host_t ind_vm, ws_params_t params)
 638 {
 639   /* jump to ws_set_params(). */
 640   surf_workstation_set_params(ind_vm, params);
 641 }
 642
 643 xbt_dict_t SIMIX_host_get_mounted_storage_list(smx_host_t host){
 644   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 645
 646   return surf_workstation_get_mounted_storage_list(host);
 647 }
 648
 649 xbt_dynar_t SIMIX_host_get_attached_storage_list(smx_host_t host){
 650   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 651
 652   return surf_workstation_get_attached_storage_list(host);
 653 }