src/surf/network.c

   1 /*      $Id$     */
   2
   3 /* Copyright (c) 2004 Arnaud Legrand. All rights reserved.                  */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "network_private.h"
   9 #include "xbt/log.h"
  10
  11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  12                                 "Logging specific to the SURF network module");
  13
  14 surf_network_resource_t surf_network_resource = NULL;
  15 static lmm_system_t network_maxmin_system = NULL;
  16 static void (*network_solve)(lmm_system_t) = NULL;
  17
  18 xbt_dict_t network_link_set = NULL;
  19 xbt_dict_t network_card_set = NULL;
  20
  21 int card_number = 0;
  22 network_link_CM02_t **routing_table = NULL;
  23 int *routing_table_size = NULL;
  24 static network_link_CM02_t loopback = NULL;
  25
  26 static void create_routing_table(void)
  27 {
  28   routing_table = xbt_new0(network_link_CM02_t *, card_number * card_number);
  29   routing_table_size = xbt_new0(int, card_number * card_number);
  30 }
  31
  32 static void network_link_free(void *nw_link)
  33 {
  34   free(((network_link_CM02_t)nw_link)->name);
  35   free(nw_link);
  36 }
  37
  38 static network_link_CM02_t network_link_new(char *name,
  39                                        double bw_initial,
  40                                        tmgr_trace_t bw_trace,
  41                                        double lat_initial,
  42                                        tmgr_trace_t lat_trace,
  43                                        e_surf_network_link_state_t
  44                                        state_initial,
  45                                        tmgr_trace_t state_trace,
  46                                        e_surf_network_link_sharing_policy_t policy)
  47 {
  48   network_link_CM02_t nw_link = xbt_new0(s_network_link_CM02_t, 1);
  49
  50
  51   nw_link->resource = (surf_resource_t) surf_network_resource;
  52   nw_link->name = name;
  53   nw_link->bw_current = bw_initial;
  54   if (bw_trace)
  55     nw_link->bw_event =
  56         tmgr_history_add_trace(history, bw_trace, 0.0, 0, nw_link);
  57   nw_link->lat_current = lat_initial;
  58   if (lat_trace)
  59     nw_link->lat_event =
  60         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  61   nw_link->state_current = state_initial;
  62   if (state_trace)
  63     nw_link->state_event =
  64         tmgr_history_add_trace(history, state_trace, 0.0, 0, nw_link);
  65
  66   nw_link->constraint =
  67       lmm_constraint_new(network_maxmin_system, nw_link, nw_link->bw_current);
  68
  69   if(policy == SURF_NETWORK_LINK_FATPIPE)
  70     lmm_constraint_shared(nw_link->constraint);
  71
  72   xbt_dict_set(network_link_set, name, nw_link, network_link_free);
  73
  74   return nw_link;
  75 }
  76
  77 static void network_card_free(void *nw_card)
  78 {
  79   free(((network_card_CM02_t)nw_card)->name);
  80   free(nw_card);
  81 }
  82
  83 static int network_card_new(const char *card_name)
  84 {
  85   network_card_CM02_t card = xbt_dict_get_or_null(network_card_set, card_name);
  86
  87   if (!card) {
  88     card = xbt_new0(s_network_card_CM02_t, 1);
  89     card->name = xbt_strdup(card_name);
  90     card->id = card_number++;
  91     xbt_dict_set(network_card_set, card_name, card, network_card_free);
  92   }
  93   return card->id;
  94 }
  95
  96 static void route_new(int src_id, int dst_id, network_link_CM02_t *link_list, int nb_link)
  97 {
  98   ROUTE_SIZE(src_id, dst_id) = nb_link;
  99   ROUTE(src_id, dst_id) = link_list = xbt_realloc(link_list, sizeof(network_link_CM02_t) * nb_link);
 100 }
 101
 102 static void parse_network_link(void)
 103 {
 104   char *name;
 105   double bw_initial;
 106   tmgr_trace_t bw_trace;
 107   double lat_initial;
 108   tmgr_trace_t lat_trace;
 109   e_surf_network_link_state_t state_initial = SURF_NETWORK_LINK_ON;
 110   e_surf_network_link_sharing_policy_t policy_initial = SURF_NETWORK_LINK_SHARED;
 111   tmgr_trace_t state_trace;
 112
 113   name = xbt_strdup(A_surfxml_network_link_name);
 114   surf_parse_get_double(&bw_initial,A_surfxml_network_link_bandwidth);
 115   surf_parse_get_trace(&bw_trace, A_surfxml_network_link_bandwidth_file);
 116   surf_parse_get_double(&lat_initial,A_surfxml_network_link_latency);
 117   surf_parse_get_trace(&lat_trace, A_surfxml_network_link_latency_file);
 118
 119   xbt_assert0((A_surfxml_network_link_state==A_surfxml_network_link_state_ON)||
 120               (A_surfxml_network_link_state==A_surfxml_network_link_state_OFF),
 121               "Invalid state");
 122   if (A_surfxml_network_link_state==A_surfxml_network_link_state_ON)
 123     state_initial = SURF_NETWORK_LINK_ON;
 124   else if (A_surfxml_network_link_state==A_surfxml_network_link_state_OFF)
 125     state_initial = SURF_NETWORK_LINK_OFF;
 126
 127   if (A_surfxml_network_link_sharing_policy==A_surfxml_network_link_sharing_policy_SHARED)
 128     policy_initial = SURF_NETWORK_LINK_SHARED;
 129   else if (A_surfxml_network_link_sharing_policy==A_surfxml_network_link_sharing_policy_FATPIPE)
 130     policy_initial = SURF_NETWORK_LINK_FATPIPE;
 131
 132   surf_parse_get_trace(&state_trace,A_surfxml_network_link_state_file);
 133
 134   network_link_new(name, bw_initial, bw_trace,
 135                    lat_initial, lat_trace, state_initial, state_trace,
 136                    policy_initial);
 137 }
 138
 139 static int nb_link;
 140 static int link_list_capacity;
 141 static network_link_CM02_t *link_list = NULL;
 142 static int src_id = -1;
 143 static int dst_id = -1;
 144
 145 static void parse_route_set_endpoints(void)
 146 {
 147   src_id = network_card_new(A_surfxml_route_src);
 148   dst_id = network_card_new(A_surfxml_route_dst);
 149   nb_link = 0;
 150   link_list_capacity = 20;
 151   link_list = xbt_new(network_link_CM02_t, link_list_capacity);
 152 }
 153
 154 static void parse_route_elem(void)
 155 {
 156   if (nb_link == link_list_capacity) {
 157     link_list_capacity *= 2;
 158     link_list = xbt_realloc(link_list, (link_list_capacity) * sizeof(network_link_CM02_t));
 159   }
 160   link_list[nb_link++] = xbt_dict_get_or_null(network_link_set, A_surfxml_route_element_name);
 161 }
 162
 163 static void parse_route_set_route(void)
 164 {
 165   route_new(src_id, dst_id, link_list, nb_link);
 166 }
 167
 168 static void parse_file(const char *file)
 169 {
 170   int i;
 171
 172   /* Figuring out the network links */
 173   surf_parse_reset_parser();
 174   ETag_surfxml_network_link_fun=parse_network_link;
 175   surf_parse_open(file);
 176   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 177   surf_parse_close();
 178
 179   /* Figuring out the network cards used */
 180   surf_parse_reset_parser();
 181   STag_surfxml_route_fun=parse_route_set_endpoints;
 182   surf_parse_open(file);
 183   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 184   surf_parse_close();
 185
 186   create_routing_table();
 187
 188   /* Building the routes */
 189   surf_parse_reset_parser();
 190   STag_surfxml_route_fun=parse_route_set_endpoints;
 191   ETag_surfxml_route_element_fun=parse_route_elem;
 192   ETag_surfxml_route_fun=parse_route_set_route;
 193   surf_parse_open(file);
 194   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 195   surf_parse_close();
 196
 197   /* Adding loopback if needed */
 198
 199   for (i = 0; i < card_number; i++)
 200     if(!ROUTE_SIZE(i,i)) {
 201       if(!loopback)
 202         loopback = network_link_new(xbt_strdup("__MSG_loopback__"),
 203                                    498000000, NULL, 0.000015, NULL,
 204                                    SURF_NETWORK_LINK_ON, NULL,
 205                                    SURF_NETWORK_LINK_FATPIPE);
 206       ROUTE_SIZE(i,i)=1;
 207       ROUTE(i,i) = xbt_new0(network_link_CM02_t, 1);
 208       ROUTE(i,i)[0] = loopback;
 209     }
 210 }
 211
 212 static void *name_service(const char *name)
 213 {
 214   network_card_CM02_t card = xbt_dict_get_or_null(network_card_set, name);
 215   return card;
 216 }
 217
 218 static const char *get_resource_name(void *resource_id)
 219 {
 220   return ((network_card_CM02_t) resource_id)->name;
 221 }
 222
 223 static int resource_used(void *resource_id)
 224 {
 225   return lmm_constraint_used(network_maxmin_system,
 226                              ((network_link_CM02_t) resource_id)->constraint);
 227 }
 228
 229 static int action_free(surf_action_t action)
 230 {
 231   action->using--;
 232   if(!action->using) {
 233     xbt_swag_remove(action, action->state_set);
 234     if(((surf_action_network_CM02_t)action)->variable)
 235       lmm_variable_free(network_maxmin_system, ((surf_action_network_CM02_t)action)->variable);
 236     free(action);
 237     return 1;
 238   }
 239   return 0;
 240 }
 241
 242 static void action_use(surf_action_t action)
 243 {
 244   action->using++;
 245 }
 246
 247 static void action_cancel(surf_action_t action)
 248 {
 249   return;
 250 }
 251
 252 static void action_recycle(surf_action_t action)
 253 {
 254   return;
 255 }
 256
 257 static void action_change_state(surf_action_t action,
 258                                 e_surf_action_state_t state)
 259 {
 260 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 261 /*     if(((surf_action_network_CM02_t)action)->variable) { */
 262 /*       lmm_variable_disable(network_maxmin_system, ((surf_action_network_CM02_t)action)->variable); */
 263 /*       ((surf_action_network_CM02_t)action)->variable = NULL; */
 264 /*     } */
 265
 266   surf_action_change_state(action, state);
 267   return;
 268 }
 269
 270 static double share_resources(double now)
 271 {
 272   s_surf_action_network_CM02_t s_action;
 273   surf_action_network_CM02_t action = NULL;
 274   xbt_swag_t running_actions = surf_network_resource->common_public->states.running_action_set;
 275   double min;
 276
 277   min = generic_maxmin_share_resources2(running_actions,
 278                                         xbt_swag_offset(s_action, variable),
 279                                         network_maxmin_system, network_solve);
 280
 281   xbt_swag_foreach(action, running_actions) {
 282     if(action->latency>0) {
 283       if(min<0) min = action->latency;
 284       else if (action->latency<min) min = action->latency;
 285     }
 286   }
 287
 288   return min;
 289 }
 290
 291 static void update_actions_state(double now, double delta)
 292 {
 293   double deltap = 0.0;
 294   surf_action_network_CM02_t action = NULL;
 295   surf_action_network_CM02_t next_action = NULL;
 296   xbt_swag_t running_actions =
 297       surf_network_resource->common_public->states.running_action_set;
 298   /*
 299   xbt_swag_t failed_actions =
 300       surf_network_resource->common_public->states.failed_action_set;
 301   */
 302
 303   xbt_swag_foreach_safe(action, next_action, running_actions) {
 304     deltap = delta;
 305     if (action->latency > 0) {
 306       if (action->latency > deltap) {
 307         double_update(&(action->latency),deltap);
 308         deltap = 0.0;
 309       } else {
 310         double_update(&(deltap), action->latency);
 311         action->latency = 0.0;
 312       }
 313       if ((action->latency == 0.0) && !(action->suspended))
 314         lmm_update_variable_weight(network_maxmin_system, action->variable,
 315                                    action->lat_current);
 316     }
 317     double_update(&(action->generic_action.remains),
 318         lmm_variable_getvalue(action->variable) * deltap);
 319     if (action->generic_action.max_duration != NO_MAX_DURATION)
 320       double_update(&(action->generic_action.max_duration), delta);
 321
 322     /*   if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 323
 324     if ((action->generic_action.remains <= 0) &&
 325         (lmm_get_variable_weight(action->variable)>0)) {
 326       action->generic_action.finish = surf_get_clock();
 327       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 328     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 329                (action->generic_action.max_duration <= 0)) {
 330       action->generic_action.finish = surf_get_clock();
 331       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 332     } else {                    /* Need to check that none of the resource has failed */
 333       lmm_constraint_t cnst = NULL;
 334       int i = 0;
 335       network_link_CM02_t nw_link = NULL;
 336
 337       while ((cnst =
 338               lmm_get_cnst_from_var(network_maxmin_system, action->variable,
 339                                     i++))) {
 340         nw_link = lmm_constraint_id(cnst);
 341         if (nw_link->state_current == SURF_NETWORK_LINK_OFF) {
 342           action->generic_action.finish = surf_get_clock();
 343           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 344           break;
 345         }
 346       }
 347     }
 348   }
 349
 350   return;
 351 }
 352
 353 static void update_resource_state(void *id,
 354                                   tmgr_trace_event_t event_type,
 355                                   double value)
 356 {
 357   network_link_CM02_t nw_link = id;
 358   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 359   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 360   /*     value, event_type); */
 361
 362   if (event_type == nw_link->bw_event) {
 363     nw_link->bw_current = value;
 364     lmm_update_constraint_bound(network_maxmin_system, nw_link->constraint,
 365                                 nw_link->bw_current);
 366   } else if (event_type == nw_link->lat_event) {
 367     double delta = value - nw_link->lat_current;
 368     lmm_variable_t var = NULL;
 369     surf_action_network_CM02_t action = NULL;
 370
 371     nw_link->lat_current = value;
 372     while (lmm_get_var_from_cnst(network_maxmin_system, nw_link->constraint, &var)) {
 373       action = lmm_variable_id(var);
 374       action->lat_current += delta;
 375       if(action->rate<0)
 376         lmm_update_variable_bound(network_maxmin_system, action->variable,
 377                                   SG_TCP_CTE_GAMMA / (2.0 * action->lat_current));
 378       else
 379         lmm_update_variable_bound(network_maxmin_system, action->variable,
 380                                   min(action->rate,SG_TCP_CTE_GAMMA / (2.0 * action->lat_current)));
 381       if(!(action->suspended))
 382         lmm_update_variable_weight(network_maxmin_system, action->variable,
 383                                    action->lat_current);
 384         lmm_update_variable_latency(network_maxmin_system, action->variable, delta);
 385     }
 386   } else if (event_type == nw_link->state_event) {
 387     if (value > 0)
 388       nw_link->state_current = SURF_NETWORK_LINK_ON;
 389     else
 390       nw_link->state_current = SURF_NETWORK_LINK_OFF;
 391   } else {
 392     CRITICAL0("Unknown event ! \n");
 393     xbt_abort();
 394   }
 395
 396   return;
 397 }
 398
 399 static surf_action_t communicate(void *src, void *dst, double size, double rate)
 400 {
 401   surf_action_network_CM02_t action = NULL;
 402   network_card_CM02_t card_src = src;
 403   network_card_CM02_t card_dst = dst;
 404   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 405   network_link_CM02_t *route = ROUTE(card_src->id, card_dst->id);
 406   int i;
 407
 408   XBT_IN4("(%s,%s,%g,%g)",card_src->name,card_dst->name,size,rate);
 409   xbt_assert2(route_size,"You're trying to send data from %s to %s but there is no connexion between these two cards.", card_src->name, card_dst->name);
 410
 411   action = xbt_new0(s_surf_action_network_CM02_t, 1);
 412
 413   action->generic_action.using = 1;
 414   action->generic_action.cost = size;
 415   action->generic_action.remains = size;
 416   action->generic_action.max_duration = NO_MAX_DURATION;
 417   action->generic_action.start = surf_get_clock();
 418   action->generic_action.finish = -1.0;
 419   action->generic_action.resource_type =
 420       (surf_resource_t) surf_network_resource;
 421   action->suspended = 0;  /* Should be useless because of the
 422                              calloc but it seems to help valgrind... */
 423   action->generic_action.state_set =
 424       surf_network_resource->common_public->states.running_action_set;
 425
 426   xbt_swag_insert(action, action->generic_action.state_set);
 427   action->rate = rate;
 428
 429   action->latency = 0.0;
 430   for (i = 0; i < route_size; i++)
 431     action->latency += route[i]->lat_current;
 432   action->lat_current = action->latency;
 433
 434   if(action->latency>0)
 435     action->variable = lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 436                                         route_size);
 437   else
 438     action->variable = lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 439                                         route_size);
 440
 441   if(action->rate<0) {
 442     if(action->lat_current>0)
 443       lmm_update_variable_bound(network_maxmin_system, action->variable,
 444                                 SG_TCP_CTE_GAMMA / (2.0 * action->lat_current));
 445     else
 446       lmm_update_variable_bound(network_maxmin_system, action->variable, -1.0);
 447   } else {
 448     if(action->lat_current>0)
 449       lmm_update_variable_bound(network_maxmin_system, action->variable,
 450                                 min(action->rate,SG_TCP_CTE_GAMMA / (2.0 * action->lat_current)));
 451     else
 452       lmm_update_variable_bound(network_maxmin_system, action->variable, action->rate);
 453   }
 454   lmm_update_variable_latency(maxmin_system, action->variable, action->latency);
 455
 456   for (i = 0; i < route_size; i++)
 457     lmm_expand(network_maxmin_system, route[i]->constraint, action->variable, 1.0);
 458   XBT_OUT;
 459
 460   return (surf_action_t) action;
 461 }
 462
 463 /* returns an array of network_link_CM02_t */
 464 static const void** get_route(void *src, void *dst) {
 465   network_card_CM02_t card_src = src;
 466   network_card_CM02_t card_dst = dst;
 467   return (const void**) ROUTE(card_src->id, card_dst->id);
 468 }
 469
 470 static int get_route_size(void *src, void *dst) {
 471   network_card_CM02_t card_src = src;
 472   network_card_CM02_t card_dst = dst;
 473   return ROUTE_SIZE(card_src->id, card_dst->id);
 474 }
 475
 476 static const char *get_link_name(const void *link) {
 477   return ((network_link_CM02_t) link)->name;
 478 }
 479
 480 static double get_link_bandwidth(const void *link) {
 481   return ((network_link_CM02_t) link)->bw_current;
 482 }
 483
 484 static double get_link_latency(const void *link) {
 485   return ((network_link_CM02_t) link)->lat_current;
 486 }
 487
 488 static void action_suspend(surf_action_t action)
 489 {
 490   ((surf_action_network_CM02_t) action)->suspended = 1;
 491   lmm_update_variable_weight(network_maxmin_system,
 492                              ((surf_action_network_CM02_t) action)->variable, 0.0);
 493 }
 494
 495 static void action_resume(surf_action_t action)
 496 {
 497   if(((surf_action_network_CM02_t) action)->suspended) {
 498     lmm_update_variable_weight(network_maxmin_system,
 499                                ((surf_action_network_CM02_t) action)->variable,
 500                                ((surf_action_network_CM02_t) action)->lat_current);
 501     ((surf_action_network_CM02_t) action)->suspended = 0;
 502   }
 503 }
 504
 505 static int action_is_suspended(surf_action_t action)
 506 {
 507   return ((surf_action_network_CM02_t) action)->suspended;
 508 }
 509
 510 static void action_set_max_duration(surf_action_t action, double duration)
 511 {
 512   action->max_duration = duration;
 513 }
 514
 515 static void finalize(void)
 516 {
 517   int i,j;
 518
 519   xbt_dict_free(&network_card_set);
 520   xbt_dict_free(&network_link_set);
 521   xbt_swag_free(surf_network_resource->common_public->states.
 522                 ready_action_set);
 523   xbt_swag_free(surf_network_resource->common_public->states.
 524                 running_action_set);
 525   xbt_swag_free(surf_network_resource->common_public->states.
 526                 failed_action_set);
 527   xbt_swag_free(surf_network_resource->common_public->states.
 528                 done_action_set);
 529   free(surf_network_resource->common_public);
 530   free(surf_network_resource->common_private);
 531   free(surf_network_resource->extension_public);
 532
 533   free(surf_network_resource);
 534   surf_network_resource = NULL;
 535
 536   loopback = NULL;
 537   for (i = 0; i < card_number; i++)
 538     for (j = 0; j < card_number; j++)
 539       free(ROUTE(i,j));
 540   free(routing_table);
 541   routing_table = NULL;
 542   free(routing_table_size);
 543   routing_table_size = NULL;
 544   card_number = 0;
 545 }
 546
 547 static void surf_network_resource_init_internal(void)
 548 {
 549   s_surf_action_t action;
 550
 551   surf_network_resource = xbt_new0(s_surf_network_resource_t, 1);
 552
 553   surf_network_resource->common_private =
 554       xbt_new0(s_surf_resource_private_t, 1);
 555   surf_network_resource->common_public =
 556       xbt_new0(s_surf_resource_public_t, 1);
 557   surf_network_resource->extension_public =
 558       xbt_new0(s_surf_network_resource_extension_public_t, 1);
 559
 560   surf_network_resource->common_public->states.ready_action_set =
 561       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 562   surf_network_resource->common_public->states.running_action_set =
 563       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 564   surf_network_resource->common_public->states.failed_action_set =
 565       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 566   surf_network_resource->common_public->states.done_action_set =
 567       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 568
 569   surf_network_resource->common_public->name_service = name_service;
 570   surf_network_resource->common_public->get_resource_name =
 571       get_resource_name;
 572   surf_network_resource->common_public->action_get_state =
 573       surf_action_get_state;
 574   surf_network_resource->common_public->action_get_start_time =
 575       surf_action_get_start_time;
 576   surf_network_resource->common_public->action_get_finish_time =
 577       surf_action_get_finish_time;
 578   surf_network_resource->common_public->action_free = action_free;
 579   surf_network_resource->common_public->action_use = action_use;
 580   surf_network_resource->common_public->action_cancel = action_cancel;
 581   surf_network_resource->common_public->action_recycle = action_recycle;
 582   surf_network_resource->common_public->action_change_state =
 583       action_change_state;
 584   surf_network_resource->common_public->action_set_data = surf_action_set_data;
 585   surf_network_resource->common_public->name = "network";
 586
 587   surf_network_resource->common_private->resource_used = resource_used;
 588   surf_network_resource->common_private->share_resources = share_resources;
 589   surf_network_resource->common_private->update_actions_state =
 590       update_actions_state;
 591   surf_network_resource->common_private->update_resource_state =
 592       update_resource_state;
 593   surf_network_resource->common_private->finalize = finalize;
 594
 595   surf_network_resource->common_public->suspend = action_suspend;
 596   surf_network_resource->common_public->resume = action_resume;
 597   surf_network_resource->common_public->is_suspended = action_is_suspended;
 598   surf_cpu_resource->common_public->set_max_duration = action_set_max_duration;
 599
 600   surf_network_resource->extension_public->communicate = communicate;
 601   surf_network_resource->extension_public->get_route = get_route;
 602   surf_network_resource->extension_public->get_route_size = get_route_size;
 603   surf_network_resource->extension_public->get_link_name = get_link_name;
 604   surf_network_resource->extension_public->get_link_bandwidth = get_link_bandwidth;
 605   surf_network_resource->extension_public->get_link_latency = get_link_latency;
 606
 607   network_link_set = xbt_dict_new();
 608   network_card_set = xbt_dict_new();
 609
 610   if(!network_maxmin_system)
 611     network_maxmin_system = lmm_system_new();
 612 }
 613
 614 /***************************************************************************/
 615 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 616 /***************************************************************************/
 617 /* @TechReport{      rr-lip2002-40, */
 618 /*   author        = {Henri Casanova and Loris Marchal}, */
 619 /*   institution   = {LIP}, */
 620 /*   title         = {A Network Model for Simulation of Grid Application}, */
 621 /*   number        = {2002-40}, */
 622 /*   month         = {oct}, */
 623 /*   year          = {2002} */
 624 /* } */
 625 void surf_network_resource_init_CM02(const char *filename)
 626 {
 627
 628   if (surf_network_resource)
 629     return;
 630   surf_network_resource_init_internal();
 631   parse_file(filename);
 632   xbt_dynar_push(resource_list, &surf_network_resource);
 633   network_solve = lmm_solve;
 634
 635   update_resource_description(surf_network_resource_description,
 636                               surf_network_resource_description_size,
 637                               "CM02",
 638                               (surf_resource_t) surf_network_resource);
 639 }
 640
 641 void surf_network_resource_init_Reno(const char *filename)
 642 {
 643   if (surf_network_resource)
 644     return;
 645   surf_network_resource_init_internal();
 646   parse_file(filename);
 647
 648   xbt_dynar_push(resource_list, &surf_network_resource);
 649   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 650   network_solve = lagrange_solve;
 651
 652   update_resource_description(surf_network_resource_description,
 653                               surf_network_resource_description_size,
 654                               "Reno",
 655                               (surf_resource_t) surf_network_resource);
 656 }
 657
 658 void surf_network_resource_init_Vegas(const char *filename)
 659 {
 660   if (surf_network_resource)
 661     return;
 662   surf_network_resource_init_internal();
 663   parse_file(filename);
 664
 665   xbt_dynar_push(resource_list, &surf_network_resource);
 666   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp, func_vegas_fpi);
 667   network_solve = lagrange_solve;
 668
 669   update_resource_description(surf_network_resource_description,
 670                               surf_network_resource_description_size,
 671                               "Vegas",
 672                               (surf_resource_t) surf_network_resource);
 673 }
 674
 675 #ifdef HAVE_SDP
 676 void surf_network_resource_init_SDP(const char *filename)
 677 {
 678   if (surf_network_resource)
 679     return;
 680   surf_network_resource_init_internal();
 681   parse_file(filename);
 682
 683   xbt_dynar_push(resource_list, &surf_network_resource);
 684   network_solve = sdp_solve;
 685
 686   update_resource_description(surf_network_resource_description,
 687                               surf_network_resource_description_size,
 688                               "SDP",
 689                               (surf_resource_t) surf_network_resource);
 690 }
 691 #endif