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 /* Each VM has a dummy CPU action on the PM layer. This CPU action works as the
 125  * constraint (capacity) of the VM in the PM layer. If the VM does not have any
 126  * active task, the dummy CPU action must be deactivated, so that the VM does
 127  * not get any CPU share in the PM layer. */
 128 static void adjust_weight_of_dummy_cpu_actions(void)
 129 {
 130   /* iterate for all hosts including virtual machines */
 131   xbt_lib_cursor_t cursor;
 132   char *key;
 133   void **ind_host;
 134
 135   xbt_lib_foreach(host_lib, cursor, key, ind_host) {
 136     workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
 137     cpu_Cas01_t cpu_cas01 = ind_host[SURF_CPU_LEVEL];
 138
 139     if (!ws_clm03)
 140       continue;
 141     /* skip if it is not a virtual machine */
 142     if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
 143       continue;
 144     xbt_assert(cpu_cas01, "cpu-less workstation");
 145
 146     /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
 147     workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
 148
 149     if (constraint_is_active(cpu_cas01)) {
 150       /* some tasks exist on this VM */
 151       XBT_DEBUG("set the weight of the dummy CPU action on PM to 1");
 152
 153       /* FIXME: we shoud use lmm_update_variable_weight() ? */
 154       /* FIXME: If we assgign 1.05 and 0.05, the system makes apparently wrong values. */
 155       surf_action_set_priority(ws_vm2013->cpu_action, 1);
 156
 157     } else {
 158       /* no task exits on this VM */
 159       XBT_DEBUG("set the weight of the dummy CPU action on PM to 0");
 160
 161       surf_action_set_priority(ws_vm2013->cpu_action, 0);
 162     }
 163   }
 164 }
 165
 166
 167 double ws_share_resources(surf_model_t workstation_model, double now)
 168 {
 169   if (workstation_model->type == SURF_MODEL_TYPE_WORKSTATION)
 170     adjust_weight_of_dummy_cpu_actions();
 171
 172   /* Invoke the share_resources() callback of the physical cpu model object and
 173    * the network model objects. */
 174   surf_model_t cpu_model = workstation_model->extension.workstation.cpu_model;
 175   surf_model_t net_model = surf_network_model;
 176
 177   double min_by_cpu = cpu_model->model_private->share_resources(cpu_model, now);
 178   double min_by_net = net_model->model_private->share_resources(net_model, now);
 179
 180   XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f",
 181       workstation_model, cpu_model->name, min_by_cpu, net_model->name, min_by_net);
 182
 183   if (min_by_cpu >= 0.0 && min_by_net >= 0.0)
 184     return min(min_by_cpu, min_by_net);
 185   else if (min_by_cpu >= 0.0)
 186     return min_by_cpu;
 187   else if (min_by_net >= 0.0)
 188     return min_by_net;
 189   else
 190     return min_by_cpu;  /* probably min_by_cpu == min_by_net == -1 */
 191 }
 192
 193 void ws_update_actions_state(surf_model_t workstation_model, double now, double delta)
 194 {
 195   return;
 196 }
 197
 198 void ws_update_resource_state(void *id, tmgr_trace_event_t event_type, double value, double date)
 199 {
 200   /* This model does not implement parallel tasks */
 201   THROW_IMPOSSIBLE;
 202 }
 203
 204 void ws_finalize(surf_model_t workstation_model)
 205 {
 206   surf_model_exit(workstation_model);
 207   workstation_model = NULL;
 208 }
 209
 210
 211
 212 surf_action_t ws_execute(void *workstation, double size)
 213 {
 214   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 215   return cpu->model->extension.cpu.execute(workstation, size);
 216 }
 217
 218 surf_action_t ws_action_sleep(void *workstation, double duration)
 219 {
 220   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 221   return cpu->model->extension.cpu.sleep(workstation, duration);
 222 }
 223
 224 void ws_action_suspend(surf_action_t action)
 225 {
 226   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 227     surf_network_model->suspend(action);
 228   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 229     action->model_obj->suspend(action);
 230   else
 231     DIE_IMPOSSIBLE;
 232 }
 233
 234 void ws_action_resume(surf_action_t action)
 235 {
 236   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 237     surf_network_model->resume(action);
 238   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 239     action->model_obj->resume(action);
 240   else
 241     DIE_IMPOSSIBLE;
 242 }
 243
 244 static int ws_action_is_suspended(surf_action_t action)
 245 {
 246   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 247     return surf_network_model->is_suspended(action);
 248   if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 249     return action->model_obj->is_suspended(action);
 250   DIE_IMPOSSIBLE;
 251   return -1;
 252 }
 253
 254 static void ws_action_set_max_duration(surf_action_t action,
 255                                        double duration)
 256 {
 257   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 258     surf_network_model->set_max_duration(action, duration);
 259   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 260     action->model_obj->set_max_duration(action, duration);
 261   else
 262     DIE_IMPOSSIBLE;
 263 }
 264
 265 void ws_action_set_priority(surf_action_t action, double priority)
 266 {
 267   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 268     surf_network_model->set_priority(action, priority);
 269   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 270     action->model_obj->set_priority(action, priority);
 271   else
 272     DIE_IMPOSSIBLE;
 273 }
 274
 275 void ws_action_set_bound(surf_action_t action, double bound)
 276 {
 277   /* FIXME: only for CPU model object? */
 278   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 279     surf_network_model->set_bound(action, bound);
 280   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 281     action->model_obj->set_bound(action, bound);
 282   else
 283     DIE_IMPOSSIBLE;
 284 }
 285
 286 #ifdef HAVE_TRACING
 287 static void ws_action_set_category(surf_action_t action, const char *category)
 288 {
 289   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 290     surf_network_model->set_category(action, category);
 291   else if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 292     action->model_obj->set_category(action, category);
 293   else
 294     DIE_IMPOSSIBLE;
 295 }
 296 #endif
 297
 298 #ifdef HAVE_LATENCY_BOUND_TRACKING
 299 static int ws_get_latency_limited(surf_action_t action)
 300 {
 301   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 302     return surf_network_model->get_latency_limited(action);
 303   else
 304     return 0;
 305 }
 306 #endif
 307
 308 double ws_action_get_remains(surf_action_t action)
 309 {
 310   if (action->model_obj->type == SURF_MODEL_TYPE_NETWORK)
 311     return surf_network_model->get_remains(action);
 312   if (action->model_obj->type == SURF_MODEL_TYPE_CPU)
 313     return action->model_obj->get_remains(action);
 314   DIE_IMPOSSIBLE;
 315   return -1.0;
 316 }
 317
 318 static surf_action_t ws_communicate(void *workstation_src,
 319                                     void *workstation_dst, double size,
 320                                     double rate)
 321 {
 322   workstation_CLM03_t src = surf_workstation_resource_priv(workstation_src);
 323   workstation_CLM03_t dst = surf_workstation_resource_priv(workstation_dst);
 324   return surf_network_model->extension.network.
 325       communicate(src->net_elm,
 326                   dst->net_elm, size, rate);
 327 }
 328
 329 e_surf_resource_state_t ws_get_state(void *workstation)
 330 {
 331   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 332   return cpu->model->extension.cpu.get_state(workstation);
 333 }
 334
 335 void ws_set_state(void *workstation, e_surf_resource_state_t state)
 336 {
 337   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 338   cpu->model->extension.cpu.set_state(workstation, state);
 339 }
 340
 341 double ws_get_speed(void *workstation, double load)
 342 {
 343   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 344   return cpu->model->extension.cpu.get_speed(workstation, load);
 345 }
 346
 347 static double ws_get_available_speed(void *workstation)
 348 {
 349   surf_resource_t cpu = ((surf_resource_t) surf_cpu_resource_priv(workstation));
 350   return cpu->model->extension.cpu.get_available_speed(workstation);
 351 }
 352
 353 static surf_action_t ws_execute_parallel_task(int workstation_nb,
 354                                               void **workstation_list,
 355                                               double *computation_amount,
 356                                               double *communication_amount,
 357                                               double rate)
 358 {
 359 #define cost_or_zero(array,pos) ((array)?(array)[pos]:0.0)
 360   if ((workstation_nb == 1)
 361       && (cost_or_zero(communication_amount, 0) == 0.0))
 362     return ws_execute(workstation_list[0], computation_amount[0]);
 363   else if ((workstation_nb == 1)
 364            && (cost_or_zero(computation_amount, 0) == 0.0))
 365     return ws_communicate(workstation_list[0], workstation_list[0],communication_amount[0], rate);
 366   else if ((workstation_nb == 2)
 367              && (cost_or_zero(computation_amount, 0) == 0.0)
 368              && (cost_or_zero(computation_amount, 1) == 0.0)) {
 369     int i,nb = 0;
 370     double value = 0.0;
 371
 372     for (i = 0; i < workstation_nb * workstation_nb; i++) {
 373       if (cost_or_zero(communication_amount, i) > 0.0) {
 374         nb++;
 375         value = cost_or_zero(communication_amount, i);
 376       }
 377     }
 378     if (nb == 1)
 379       return ws_communicate(workstation_list[0], workstation_list[1],value, rate);
 380   }
 381 #undef cost_or_zero
 382
 383   THROW_UNIMPLEMENTED;          /* This model does not implement parallel tasks */
 384   return NULL;
 385 }
 386
 387
 388 /* returns an array of network_link_CM02_t */
 389 static xbt_dynar_t ws_get_route(void *workstation_src, void *workstation_dst)
 390 {
 391   XBT_DEBUG("ws_get_route");
 392   workstation_CLM03_t src = surf_workstation_resource_priv(workstation_src);
 393   workstation_CLM03_t dst = surf_workstation_resource_priv(workstation_dst);
 394   return surf_network_model->extension.
 395       network.get_route(src->net_elm,
 396                   dst->net_elm);
 397 }
 398
 399 static double ws_get_link_bandwidth(const void *link)
 400 {
 401   return surf_network_model->extension.network.get_link_bandwidth(link);
 402 }
 403
 404 static double ws_get_link_latency(const void *link)
 405 {
 406   return surf_network_model->extension.network.get_link_latency(link);
 407 }
 408
 409 static int ws_link_shared(const void *link)
 410 {
 411   return surf_network_model->extension.network.link_shared(link);
 412 }
 413
 414 static xbt_dict_t ws_get_properties(const void *ws)
 415 {
 416   return surf_resource_properties(surf_cpu_resource_priv(ws));
 417 }
 418
 419 static storage_t find_storage_on_mount_list(void *workstation,const char* storage)
 420 {
 421   storage_t st = NULL;
 422   s_mount_t mnt;
 423   unsigned int cursor;
 424   workstation_CLM03_t ws = (workstation_CLM03_t) surf_workstation_resource_priv(workstation);
 425   xbt_dynar_t storage_list = ws->storage;
 426
 427   XBT_DEBUG("Search for storage name '%s' on '%s'",storage,ws->generic_resource.name);
 428   xbt_dynar_foreach(storage_list,cursor,mnt)
 429   {
 430     XBT_DEBUG("See '%s'",mnt.name);
 431     if(!strcmp(storage,mnt.name)){
 432       st = mnt.id;
 433       break;
 434     }
 435   }
 436   if(!st) xbt_die("Can't find mount '%s' for '%s'",storage,ws->generic_resource.name);
 437   return st;
 438 }
 439
 440 static surf_action_t ws_action_open(void *workstation, const char* mount, const char* path, const char* mode)
 441 {
 442   storage_t st = find_storage_on_mount_list(workstation, mount);
 443   XBT_DEBUG("OPEN on disk '%s'",st->generic_resource.name);
 444   surf_model_t model = st->generic_resource.model;
 445   return model->extension.storage.open(st, mount, path, mode);
 446 }
 447
 448 static surf_action_t ws_action_close(void *workstation, surf_file_t fp)
 449 {
 450   storage_t st = find_storage_on_mount_list(workstation, fp->storage);
 451   XBT_DEBUG("CLOSE on disk '%s'",st->generic_resource.name);
 452   surf_model_t model = st->generic_resource.model;
 453   return model->extension.storage.close(st, fp);
 454 }
 455
 456 static surf_action_t ws_action_read(void *workstation, void* ptr, size_t size, size_t nmemb, surf_file_t stream)
 457 {
 458   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 459   XBT_DEBUG("READ on disk '%s'",st->generic_resource.name);
 460   surf_model_t model = st->generic_resource.model;
 461   return model->extension.storage.read(st, ptr, (double)size, nmemb, stream);
 462 }
 463
 464 static surf_action_t ws_action_write(void *workstation, const void* ptr, size_t size, size_t nmemb, surf_file_t stream)
 465 {
 466   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 467   XBT_DEBUG("WRITE on disk '%s'",st->generic_resource.name);
 468   surf_model_t model = st->generic_resource.model;
 469   return model->extension.storage.write(st,  ptr, size, nmemb, stream);
 470 }
 471
 472 static surf_action_t ws_action_stat(void *workstation, surf_file_t stream)
 473 {
 474   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 475   XBT_DEBUG("STAT on disk '%s'",st->generic_resource.name);
 476   surf_model_t model = st->generic_resource.model;
 477   return model->extension.storage.stat(st,  stream);
 478 }
 479
 480 static surf_action_t ws_action_unlink(void *workstation, surf_file_t stream)
 481 {
 482   storage_t st = find_storage_on_mount_list(workstation, stream->storage);
 483   XBT_DEBUG("UNLINK on disk '%s'",st->generic_resource.name);
 484   surf_model_t model = st->generic_resource.model;
 485   return model->extension.storage.unlink(st,  stream);
 486 }
 487
 488 static surf_action_t ws_action_ls(void *workstation, const char* mount, const char *path)
 489 {
 490   XBT_DEBUG("LS on mount '%s' and file '%s'",mount, path);
 491   storage_t st = find_storage_on_mount_list(workstation, mount);
 492   surf_model_t model = st->generic_resource.model;
 493   return model->extension.storage.ls(st, path);
 494 }
 495
 496 void ws_get_params(void *ws, ws_params_t params)
 497 {
 498   workstation_CLM03_t ws_clm03 = surf_workstation_resource_priv(ws);
 499   memcpy(params, &ws_clm03->params, sizeof(s_ws_params_t));
 500 }
 501
 502 void ws_set_params(void *ws, ws_params_t params)
 503 {
 504   workstation_CLM03_t ws_clm03 = surf_workstation_resource_priv(ws);
 505   /* may check something here. */
 506   memcpy(&ws_clm03->params, params, sizeof(s_ws_params_t));
 507 }
 508
 509 static xbt_dynar_t ws_get_vms(void *pm)
 510 {
 511   xbt_dynar_t dyn = xbt_dynar_new(sizeof(smx_host_t), NULL);
 512
 513   /* iterate for all hosts including virtual machines */
 514   xbt_lib_cursor_t cursor;
 515   char *key;
 516   void **ind_host;
 517   xbt_lib_foreach(host_lib, cursor, key, ind_host) {
 518     workstation_CLM03_t ws_clm03 = ind_host[SURF_WKS_LEVEL];
 519     if (!ws_clm03)
 520       continue;
 521     /* skip if it is not a virtual machine */
 522     if (ws_clm03->generic_resource.model != surf_vm_workstation_model)
 523       continue;
 524
 525     /* It is a virtual machine, so we can cast it to workstation_VM2013_t */
 526     workstation_VM2013_t ws_vm2013 = (workstation_VM2013_t) ws_clm03;
 527     if (pm == ws_vm2013->sub_ws)
 528       xbt_dynar_push(dyn, &ws_vm2013->sub_ws);
 529   }
 530
 531   return dyn;
 532 }
 533
 534
 535 static void surf_workstation_model_init_internal(void)
 536 {
 537   surf_model_t model = surf_model_init();
 538
 539   model->name = "Workstation";
 540   model->type = SURF_MODEL_TYPE_WORKSTATION;
 541   model->action_unref     = ws_action_unref;
 542   model->action_cancel    = ws_action_cancel;
 543   model->action_state_set = ws_action_state_set;
 544
 545   model->model_private->resource_used         = ws_resource_used;
 546   model->model_private->share_resources       = ws_share_resources;
 547   model->model_private->update_actions_state  = ws_update_actions_state;
 548   model->model_private->update_resource_state = ws_update_resource_state;
 549   model->model_private->finalize              = ws_finalize;
 550
 551   model->suspend          = ws_action_suspend;
 552   model->resume           = ws_action_resume;
 553   model->is_suspended     = ws_action_is_suspended;
 554   model->set_max_duration = ws_action_set_max_duration;
 555   model->set_priority     = ws_action_set_priority;
 556   model->set_bound        = ws_action_set_bound;
 557   #ifdef HAVE_TRACING
 558   model->set_category     = ws_action_set_category;
 559   #endif
 560   model->get_remains      = ws_action_get_remains;
 561   #ifdef HAVE_LATENCY_BOUND_TRACKING
 562   model->get_latency_limited = ws_get_latency_limited;
 563   #endif
 564
 565   /* For VM support, we have a surf cpu model object for each workstation model
 566    * object. The physical workstation model object has the cpu model object of
 567    * the physical machine layer. */
 568   xbt_assert(surf_cpu_model_pm);
 569   model->extension.workstation.cpu_model = surf_cpu_model_pm;
 570
 571   model->extension.workstation.execute   = ws_execute;
 572   model->extension.workstation.sleep     = ws_action_sleep;
 573   model->extension.workstation.get_state = ws_get_state;
 574   model->extension.workstation.set_state = ws_set_state;
 575   model->extension.workstation.get_speed = ws_get_speed;
 576   model->extension.workstation.get_available_speed = ws_get_available_speed;
 577
 578   model->extension.workstation.communicate           = ws_communicate;
 579   model->extension.workstation.get_route             = ws_get_route;
 580   model->extension.workstation.execute_parallel_task = ws_execute_parallel_task;
 581   model->extension.workstation.get_link_bandwidth    = ws_get_link_bandwidth;
 582   model->extension.workstation.get_link_latency      = ws_get_link_latency;
 583   model->extension.workstation.link_shared           = ws_link_shared;
 584   model->extension.workstation.get_properties        = ws_get_properties;
 585
 586   model->extension.workstation.open   = ws_action_open;
 587   model->extension.workstation.close  = ws_action_close;
 588   model->extension.workstation.read   = ws_action_read;
 589   model->extension.workstation.write  = ws_action_write;
 590   model->extension.workstation.stat   = ws_action_stat;
 591   model->extension.workstation.unlink = ws_action_unlink;
 592   model->extension.workstation.ls     = ws_action_ls;
 593
 594   model->extension.workstation.get_params = ws_get_params;
 595   model->extension.workstation.set_params = ws_set_params;
 596   model->extension.workstation.get_vms    = ws_get_vms;
 597
 598   surf_workstation_model = model;
 599 }
 600
 601 void surf_workstation_model_init_current_default(void)
 602 {
 603   xbt_cfg_setdefault_int(_sg_cfg_set, "network/crosstraffic", 1);
 604   surf_cpu_model_init_Cas01();
 605   surf_network_model_init_LegrandVelho();
 606
 607   /* surf_cpu_mode_pm and surf_network_model must be initialized in advance. */
 608   xbt_assert(surf_cpu_model_pm);
 609   xbt_assert(surf_network_model);
 610   surf_workstation_model_init_internal();
 611
 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 }
 616
 617 void surf_workstation_model_init_compound()
 618 {
 619   xbt_assert(surf_cpu_model_pm, "No CPU model defined yet!");
 620   xbt_assert(surf_network_model, "No network model defined yet!");
 621
 622   surf_workstation_model_init_internal();
 623   xbt_dynar_push(model_list, &surf_workstation_model);
 624   xbt_dynar_push(model_list_invoke, &surf_workstation_model);
 625   sg_platf_host_add_cb(workstation_new);
 626 }