src/surf/workstation.c

   1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. 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 "xbt/ex.h"
   8 #include "xbt/dict.h"
   9 #include "portable.h"
  10 #include "surf_private.h"
  11 #include "storage_private.h"
  12 #include "surf/surf_resource.h"
  13 #include "simgrid/sg_config.h"
  14 #include "workstation_private.h"
  15 #include "vm_workstation_private.h"
  16 #include "cpu_cas01_private.h"
  17 #include "maxmin_private.h"
  18
  19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_workstation, surf,
  20                                 "Logging specific to the SURF workstation module");
  21
  22 surf_model_t surf_workstation_model = NULL;
  23
  24
  25 static void workstation_new(sg_platf_host_cbarg_t host)
  26 {
  27   const char *name = host->id;
  28
  29   /* NOTE: The properties object is NULL, because the current code uses that of
  30    * that of a cpu resource. */
  31   workstation_CLM03_t ws = (workstation_CLM03_t) surf_resource_new(sizeof(s_workstation_CLM03_t), surf_workstation_model, name, NULL);
  32
  33   ws->storage = xbt_lib_get_or_null(storage_lib, name, ROUTING_STORAGE_HOST_LEVEL);
  34   ws->net_elm = xbt_lib_get_or_null(host_lib, name, ROUTING_HOST_LEVEL);
  35
  36   XBT_DEBUG("Create ws %s with %ld mounted disks", name, xbt_dynar_length(ws->storage));
  37   xbt_lib_set(host_lib, name, SURF_WKS_LEVEL, ws);
  38 }
  39
  40
  41 static void ws_parallel_action_cancel(surf_action_t action)
  42 {
  43   THROW_UNIMPLEMENTED;          /* This model does not implement parallel tasks */
  44 }
  45
  46 static int ws_parallel_action_free(surf_action_t action)
  47 {
  48   THROW_UNIMPLEMENTED;          /* This model does not implement parallel tasks */
  49   return -1;
  50 }
  51
  52 int ws_action_unref(surf_action_t action)
  53 {
  54   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
  55     return surf_network_model->action_unref(action);
  56   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
  57     return action->model_obj->action_unref(action);
  58       // previously was: Adrien/Arnaud 6 feb
  59           // surf_cpu_model->action_unref(action);
  60   else if (action->model_obj->type == SURF_MODEL_TYPE_WORKSTATION)
  61     return ws_parallel_action_free(action);
  62   else
  63     DIE_IMPOSSIBLE;
  64   return 0;
  65 }
  66
  67 void ws_action_cancel(surf_action_t action)
  68 {
  69   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
  70     surf_network_model->action_cancel(action);
  71   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
  72     action->model_obj->action_cancel(action);
  73   else if (action->model_obj->type == SURF_MODEL_TYPE_WORKSTATION)
  74     ws_parallel_action_cancel(action);
  75   else
  76     DIE_IMPOSSIBLE;
  77   return;
  78 }
  79
  80 static void ws_action_state_set(surf_action_t action,
  81                                 e_surf_action_state_t state)
  82 {
  83   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
  84     surf_network_model->action_state_set(action, state);
  85   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
  86     action->model_obj->action_state_set(action, state);
  87   else if (action->model_obj->type == SURF_MODEL_TYPE_WORKSTATION)
  88     surf_action_state_set(action, state);
  89   else
  90     DIE_IMPOSSIBLE;
  91   return;
  92 }
  93
  94
  95 /* -- The callback functions at model_private -- */
  96 /* These callbacks are also used for the vm workstation model. */
  97 int ws_resource_used(void *resource_id)
  98 {
  99   /* This model does not implement parallel tasks */
 100   THROW_IMPOSSIBLE;
 101   return -1;
 102 }
 103
 104
 105 /* TODO: The current code would be slow due to the iteration. Later, we can
 106  * make it faster. */
 107 static int constraint_is_active(cpu_Cas01_t cpu_cas01)
 108 {
 109   surf_model_t cpu_model = cpu_cas01->generic_resource.model;
 110   lmm_system_t sys = cpu_model->model_private->maxmin_system;
 111   int found = 0;
 112   lmm_constraint_t cnst_tmp;
 113
 114   xbt_swag_foreach(cnst_tmp, &sys->active_constraint_set) {
 115     if (cnst_tmp == cpu_cas01->constraint) {
 116       found = 1;
 117       break;
 118     }
 119   }
 120
 121   return found;
 122 }
 123
 124 static void adjust_weight_of_dummy_cpu_actions(void)
 125 {
 126   /* iterate for all hosts including virtual machines */
 127   xbt_lib_cursor_t cursor;
 128   char *key;
 129   void **ind_host;
 130
 131   xbt_lib_foreach(host_lib, cursor, key, ind_host) {
 132     workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
 133     cpu_Cas01_t cpu_cas01 = ind_host[SURF_CPU_LEVEL];
 134
 135     if (!ws_clm03)
 136       continue;
 137     /* skip if it is not a virtual machine */
 138     if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
 139       continue;
 140     xbt_assert(cpu_cas01, "cpu-less workstation");
 141
 142     /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
 143     workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
 144
 145     if (constraint_is_active(cpu_cas01)) {
 146       /* some tasks exist on this VM */
 147       XBT_DEBUG("set the weight of the dummy CPU action on PM to 1");
 148
 149       /* FIXME: we shoud use lmm_update_variable_weight() ? */
 150       /* FIXME: If we assgign 1.05 and 0.05, the system makes apparently wrong values. */
 151       surf_action_set_priority(ws_vm2013->cpu_action, 1);
 152
 153     } else {
 154       /* no task exits on this VM */
 155       XBT_DEBUG("set the weight of the dummy CPU action on PM to 0");
 156
 157       surf_action_set_priority(ws_vm2013->cpu_action, 0);
 158     }
 159   }
 160 }
 161
 162
 163 double ws_share_resources(surf_model_t workstation_model, double now)
 164 {
 165   if (workstation_model->type == SURF_MODEL_TYPE_WORKSTATION)
 166     adjust_weight_of_dummy_cpu_actions();
 167
 168   /* Invoke the share_resources() callback of the physical cpu model object and
 169    * the network model objects. */
 170   surf_model_t cpu_model = workstation_model->extension.workstation.cpu_model;
 171   surf_model_t net_model = surf_network_model;
 172
 173   double min_by_cpu = cpu_model->model_private->share_resources(cpu_model, now);
 174   double min_by_net = net_model->model_private->share_resources(net_model, now);
 175
 176   XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f",
 177       workstation_model, cpu_model->name, min_by_cpu, net_model->name, min_by_net);
 178
 179   if (min_by_cpu >= 0.0 && min_by_net >= 0.0)
 180     return min(min_by_cpu, min_by_net);
 181   else if (min_by_cpu >= 0.0)
 182     return min_by_cpu;
 183   else if (min_by_net >= 0.0)
 184     return min_by_net;
 185   else
 186     return min_by_cpu;  /* probably min_by_cpu == min_by_net == -1 */
 187 }
 188
 189 void ws_update_actions_state(surf_model_t workstation_model, double now, double delta)
 190 {
 191   return;
 192 }
 193
 194 void ws_update_resource_state(void *id, tmgr_trace_event_t event_type, double value, double date)
 195 {
 196   /* This model does not implement parallel tasks */
 197   THROW_IMPOSSIBLE;
 198 }
 199
 200 void ws_finalize(surf_model_t workstation_model)
 201 {
 202   surf_model_exit(workstation_model);
 203   workstation_model = NULL;
 204 }
 205
 206
 207
 208 surf_action_t ws_execute(void *workstation, double size)
 209 {
 210   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 211   return cpu->model->extension.cpu.execute(workstation, size);
 212 }
 213
 214 surf_action_t ws_action_sleep(void *workstation, double duration)
 215 {
 216   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 217   return cpu->model->extension.cpu.sleep(workstation, duration);
 218 }
 219
 220 void ws_action_suspend(surf_action_t action)
 221 {
 222   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 223     surf_network_model->suspend(action);
 224   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 225     action->model_obj->suspend(action);
 226   else
 227     DIE_IMPOSSIBLE;
 228 }
 229
 230 void ws_action_resume(surf_action_t action)
 231 {
 232   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 233     surf_network_model->resume(action);
 234   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 235     action->model_obj->resume(action);
 236   else
 237     DIE_IMPOSSIBLE;
 238 }
 239
 240 static int ws_action_is_suspended(surf_action_t action)
 241 {
 242   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 243     return surf_network_model->is_suspended(action);
 244   if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 245     return action->model_obj->is_suspended(action);
 246   DIE_IMPOSSIBLE;
 247   return -1;
 248 }
 249
 250 static void ws_action_set_max_duration(surf_action_t action,
 251                                        double duration)
 252 {
 253   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 254     surf_network_model->set_max_duration(action, duration);
 255   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 256     action->model_obj->set_max_duration(action, duration);
 257   else
 258     DIE_IMPOSSIBLE;
 259 }
 260
 261 void ws_action_set_priority(surf_action_t action, double priority)
 262 {
 263   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 264     surf_network_model->set_priority(action, priority);
 265   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 266     action->model_obj->set_priority(action, priority);
 267   else
 268     DIE_IMPOSSIBLE;
 269 }
 270
 271 void ws_action_set_bound(surf_action_t action, double bound)
 272 {
 273   /* FIXME: only for CPU model object? */
 274   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 275     surf_network_model->set_bound(action, bound);
 276   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 277     action->model_obj->set_bound(action, bound);
 278   else
 279     DIE_IMPOSSIBLE;
 280 }
 281
 282 #ifdef HAVE_TRACING
 283 static void ws_action_set_category(surf_action_t action, const char *category)
 284 {
 285   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 286     surf_network_model->set_category(action, category);
 287   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 288     action->model_obj->set_category(action, category);
 289   else
 290     DIE_IMPOSSIBLE;
 291 }
 292 #endif
 293
 294 #ifdef HAVE_LATENCY_BOUND_TRACKING
 295 static int ws_get_latency_limited(surf_action_t action)
 296 {
 297   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 298     return surf_network_model->get_latency_limited(action);
 299   else
 300     return 0;
 301 }
 302 #endif
 303
 304 double ws_action_get_remains(surf_action_t action)
 305 {
 306   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 307     return surf_network_model->get_remains(action);
 308   if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 309     return action->model_obj->get_remains(action);
 310   DIE_IMPOSSIBLE;
 311   return -1.0;
 312 }
 313
 314 static surf_action_t ws_communicate(void *workstation_src,
 315                                     void *workstation_dst, double size,
 316                                     double rate)
 317 {
 318   workstation_CLM03_t src = surf_workstation_resource_priv(workstation_src);
 319   workstation_CLM03_t dst = surf_workstation_resource_priv(workstation_dst);
 320   return surf_network_model->extension.network.
 321       communicate(src->net_elm,
 322                   dst->net_elm, size, rate);
 323 }
 324
 325 e_surf_resource_state_t ws_get_state(void *workstation)
 326 {
 327   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 328   return cpu->model->extension.cpu.get_state(workstation);
 329 }
 330
 331 double ws_get_speed(void *workstation, double load)
 332 {
 333   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 334   return cpu->model->extension.cpu.get_speed(workstation, load);
 335 }
 336
 337 static double ws_get_available_speed(void *workstation)
 338 {
 339   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 340   return cpu->model->extension.cpu.get_available_speed(workstation);
 341 }
 342
 343 static surf_action_t ws_execute_parallel_task(int workstation_nb,
 344                                               void **workstation_list,
 345                                               double *computation_amount,
 346                                               double *communication_amount,
 347                                               double rate)
 348 {
 349 #define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
 350   if ((workstation_nb == 1)
 351       && (cost_or_zero(communication_amount, 0) == 0.0))
 352     return ws_execute(workstation_list[0], computation_amount[0]);
 353   else if ((workstation_nb == 1)
 354            && (cost_or_zero(computation_amount, 0) == 0.0))
 355     return ws_communicate(workstation_list[0], workstation_list[0],communication_amount[0], rate);
 356   else if ((workstation_nb == 2)
 357              && (cost_or_zero(computation_amount, 0) == 0.0)
 358              && (cost_or_zero(computation_amount, 1) == 0.0)) {
 359     int i,nb = 0;
 360     double value = 0.0;
 361
 362     for (i = 0; i < workstation_nb * workstation_nb; i++) {
 363       if (cost_or_zero(communication_amount, i) > 0.0) {
 364         nb++;
 365         value = cost_or_zero(communication_amount, i);
 366       }
 367     }
 368     if (nb == 1)
 369       return ws_communicate(workstation_list[0], workstation_list[1],value, rate);
 370   }
 371 #undef cost_or_zero
 372
 373   THROW_UNIMPLEMENTED;          /* This model does not implement parallel tasks */
 374   return NULL;
 375 }
 376
 377
 378 /* returns an array of network_link_CM02_t */
 379 static xbt_dynar_t ws_get_route(void *workstation_src, void *workstation_dst)
 380 {
 381   XBT_DEBUG("ws_get_route");
 382   workstation_CLM03_t src = surf_workstation_resource_priv(workstation_src);
 383   workstation_CLM03_t dst = surf_workstation_resource_priv(workstation_dst);
 384   return surf_network_model->extension.
 385       network.get_route(src->net_elm,
 386                   dst->net_elm);
 387 }
 388
 389 static double ws_get_link_bandwidth(const void *link)
 390 {
 391   return surf_network_model->extension.network.get_link_bandwidth(link);
 392 }
 393
 394 static double ws_get_link_latency(const void *link)
 395 {
 396   return surf_network_model->extension.network.get_link_latency(link);
 397 }
 398
 399 static int ws_link_shared(const void *link)
 400 {
 401   return surf_network_model->extension.network.link_shared(link);
 402 }
 403
 404 static xbt_dict_t ws_get_properties(const void *ws)
 405 {
 406   return surf_resource_properties(surf_cpu_resource_priv(ws));
 407 }
 408
 409 static storage_t find_storage_on_mount_list(void *workstation,const char* storage)
 410 {
 411   storage_t st = NULL;
 412   s_mount_t mnt;
 413   unsigned int cursor;
 414   workstation_CLM03_t ws = (workstation_CLM03_t) surf_workstation_resource_priv(workstation);
 415   xbt_dynar_t storage_list = ws->storage;
 416
 417   XBT_DEBUG("Search for storage name '%s' on '%s'",storage,ws->generic_resource.name);
 418   xbt_dynar_foreach(storage_list,cursor,mnt)
 419   {
 420     XBT_DEBUG("See '%s'",mnt.name);
 421     if(!strcmp(storage,mnt.name)){
 422       st = mnt.id;
 423       break;
 424     }
 425   }
 426   if(!st) xbt_die("Can't find mount '%s' for '%s'",storage,ws->generic_resource.name);
 427   return st;
 428 }
 429
 430 static surf_action_t ws_action_open(void *workstation, const char* mount, const char* path, const char* mode)
 431 {
 432   storage_t st = find_storage_on_mount_list(workstation, mount);
 433   XBT_DEBUG("OPEN on disk '%s'",st->generic_resource.name);
 434   surf_model_t model = st->generic_resource.model;
 435   return model->extension.storage.open(st, mount, path, mode);
 436 }
 437
 438 static surf_action_t ws_action_close(void *workstation, surf_file_t fp)
 439 {
 440   storage_t st = find_storage_on_mount_list(workstation, fp->storage);
 441   XBT_DEBUG("CLOSE on disk '%s'",st->generic_resource.name);
 442   surf_model_t model = st->generic_resource.model;
 443   return model->extension.storage.close(st, fp);
 444 }
 445
 446 static surf_action_t ws_action_read(void *workstation, void* ptr, size_t size, size_t nmemb, surf_file_t stream)
 447 {
 448   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 449   XBT_DEBUG("READ on disk '%s'",st->generic_resource.name);
 450   surf_model_t model = st->generic_resource.model;
 451   return model->extension.storage.read(st, ptr, (double)size, nmemb, stream);
 452 }
 453
 454 static surf_action_t ws_action_write(void *workstation, const void* ptr, size_t size, size_t nmemb, surf_file_t stream)
 455 {
 456   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 457   XBT_DEBUG("WRITE on disk '%s'",st->generic_resource.name);
 458   surf_model_t model = st->generic_resource.model;
 459   return model->extension.storage.write(st,  ptr, size, nmemb, stream);
 460 }
 461
 462 static surf_action_t ws_action_stat(void *workstation, surf_file_t stream)
 463 {
 464   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 465   XBT_DEBUG("STAT on disk '%s'",st->generic_resource.name);
 466   surf_model_t model = st->generic_resource.model;
 467   return model->extension.storage.stat(st,  stream);
 468 }
 469
 470 static surf_action_t ws_action_unlink(void *workstation, surf_file_t stream)
 471 {
 472   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 473   XBT_DEBUG("UNLINK on disk '%s'",st->generic_resource.name);
 474   surf_model_t model = st->generic_resource.model;
 475   return model->extension.storage.unlink(st,  stream);
 476 }
 477
 478 static surf_action_t ws_action_ls(void *workstation, const char* mount, const char *path)
 479 {
 480   XBT_DEBUG("LS on mount '%s' and file '%s'",mount, path);
 481   storage_t st = find_storage_on_mount_list(workstation, mount);
 482   surf_model_t model = st->generic_resource.model;
 483   return model->extension.storage.ls(st, path);
 484 }
 485
 486 void ws_get_params(void *ws, ws_params_t params)
 487 {
 488   workstation_CLM03_t ws_clm03 = surf_workstation_resource_priv(ws);
 489   memcpy(params, &ws_clm03->params, sizeof(s_ws_params_t));
 490 }
 491
 492 void ws_set_params(void *ws, ws_params_t params)
 493 {
 494   workstation_CLM03_t ws_clm03 = surf_workstation_resource_priv(ws);
 495   /* may check something here. */
 496   memcpy(&ws_clm03->params, params, sizeof(s_ws_params_t));
 497 }
 498
 499 static xbt_dynar_t ws_get_vms(void *pm)
 500 {
 501   xbt_dynar_t dyn = xbt_dynar_new(sizeof(smx_host_t), NULL);
 502
 503   /* iterate for all hosts including virtual machines */
 504   xbt_lib_cursor_t cursor;
 505   char *key;
 506   void **ind_host;
 507   xbt_lib_foreach(host_lib, cursor, key, ind_host) {
 508     workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
 509     if (!ws_clm03)
 510       continue;
 511     /* skip if it is not a virtual machine */
 512     if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
 513       continue;
 514
 515     /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
 516     workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
 517     if (pm == ws_vm2013->sub_ws)
 518       xbt_dynar_push(dyn, &ws_vm2013->sub_ws);
 519   }
 520
 521   return dyn;
 522 }
 523
 524
 525 static void surf_workstation_model_init_internal(void)
 526 {
 527   surf_model_t model = surf_model_init();
 528
 529   model->name = "Workstation";
 530   model->type = SURF_MODEL_TYPE_WORKSTATION;
 531   model->action_unref     = ws_action_unref;
 532   model->action_cancel    = ws_action_cancel;
 533   model->action_state_set = ws_action_state_set;
 534
 535   model->model_private->resource_used         = ws_resource_used;
 536   model->model_private->share_resources       = ws_share_resources;
 537   model->model_private->update_actions_state  = ws_update_actions_state;
 538   model->model_private->update_resource_state = ws_update_resource_state;
 539   model->model_private->finalize              = ws_finalize;
 540
 541   model->suspend          = ws_action_suspend;
 542   model->resume           = ws_action_resume;
 543   model->is_suspended     = ws_action_is_suspended;
 544   model->set_max_duration = ws_action_set_max_duration;
 545   model->set_priority     = ws_action_set_priority;
 546   model->set_bound        = ws_action_set_bound;
 547   #ifdef HAVE_TRACING
 548   model->set_category     = ws_action_set_category;
 549   #endif
 550   model->get_remains      = ws_action_get_remains;
 551   #ifdef HAVE_LATENCY_BOUND_TRACKING
 552   model->get_latency_limited = ws_get_latency_limited;
 553   #endif
 554
 555   /* For VM support, we have a surf cpu model object for each workstation model
 556    * object. The physical workstation model object has the cpu model object of
 557    * the physical machine layer. */
 558   xbt_assert(surf_cpu_model_pm);
 559   model->extension.workstation.cpu_model = surf_cpu_model_pm;
 560
 561   model->extension.workstation.execute   = ws_execute;
 562   model->extension.workstation.sleep     = ws_action_sleep;
 563   model->extension.workstation.get_state = ws_get_state;
 564   model->extension.workstation.get_speed = ws_get_speed;
 565   model->extension.workstation.get_available_speed = ws_get_available_speed;
 566
 567   model->extension.workstation.communicate           = ws_communicate;
 568   model->extension.workstation.get_route             = ws_get_route;
 569   model->extension.workstation.execute_parallel_task = ws_execute_parallel_task;
 570   model->extension.workstation.get_link_bandwidth    = ws_get_link_bandwidth;
 571   model->extension.workstation.get_link_latency      = ws_get_link_latency;
 572   model->extension.workstation.link_shared           = ws_link_shared;
 573   model->extension.workstation.get_properties        = ws_get_properties;
 574
 575   model->extension.workstation.open   = ws_action_open;
 576   model->extension.workstation.close  = ws_action_close;
 577   model->extension.workstation.read   = ws_action_read;
 578   model->extension.workstation.write  = ws_action_write;
 579   model->extension.workstation.stat   = ws_action_stat;
 580   model->extension.workstation.unlink = ws_action_unlink;
 581   model->extension.workstation.ls     = ws_action_ls;
 582
 583   model->extension.workstation.get_params = ws_get_params;
 584   model->extension.workstation.set_params = ws_set_params;
 585   model->extension.workstation.get_vms    = ws_get_vms;
 586
 587   surf_workstation_model = model;
 588 }
 589
 590 void surf_workstation_model_init_current_default(void)
 591 {
 592   xbt_cfg_setdefault_int(_sg_cfg_set, "network/crosstraffic", 1);
 593   surf_cpu_model_init_Cas01();
 594   surf_network_model_init_LegrandVelho();
 595
 596   /* surf_cpu_mode_pm and surf_network_model must be initialized in advance. */
 597   xbt_assert(surf_cpu_model_pm);
 598   xbt_assert(surf_network_model);
 599   surf_workstation_model_init_internal();
 600
 601   xbt_dynar_push(model_list, &surf_workstation_model);
 602   xbt_dynar_push(model_list_invoke, &surf_workstation_model);
 603   sg_platf_host_add_cb(workstation_new);
 604 }
 605
 606 void surf_workstation_model_init_compound()
 607 {
 608   xbt_assert(surf_cpu_model_pm, "No CPU model defined yet!");
 609   xbt_assert(surf_network_model, "No network model defined yet!");
 610
 611   surf_workstation_model_init_internal();
 612   xbt_dynar_push(model_list, &surf_workstation_model);
 613   xbt_dynar_push(model_list_invoke, &surf_workstation_model);
 614   sg_platf_host_add_cb(workstation_new);
 615 }