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
  16 xbt_dict_t network_link_set = NULL;
  17 xbt_dict_t network_card_set = NULL;
  18
  19 int card_number = 0;
  20 network_link_CM02_t **routing_table = NULL;
  21 int *routing_table_size = NULL;
  22 static network_link_CM02_t loopback = NULL;
  23
  24 static void create_routing_table(void)
  25 {
  26   routing_table = xbt_new0(network_link_CM02_t *, card_number * card_number);
  27   routing_table_size = xbt_new0(int, card_number * card_number);
  28 }
  29
  30 static void network_link_free(void *nw_link)
  31 {
  32   free(((network_link_CM02_t)nw_link)->name);
  33   free(nw_link);
  34 }
  35
  36 static network_link_CM02_t network_link_new(char *name,
  37                                        double bw_initial,
  38                                        tmgr_trace_t bw_trace,
  39                                        double lat_initial,
  40                                        tmgr_trace_t lat_trace,
  41                                        e_surf_network_link_state_t
  42                                        state_initial,
  43                                        tmgr_trace_t state_trace,
  44                                        e_surf_network_link_sharing_policy_t policy)
  45 {
  46   network_link_CM02_t nw_link = xbt_new0(s_network_link_CM02_t, 1);
  47
  48
  49   nw_link->resource = (surf_resource_t) surf_network_resource;
  50   nw_link->name = name;
  51   nw_link->bw_current = bw_initial;
  52   if (bw_trace)
  53     nw_link->bw_event =
  54         tmgr_history_add_trace(history, bw_trace, 0.0, 0, nw_link);
  55   nw_link->lat_current = lat_initial;
  56   if (lat_trace)
  57     nw_link->lat_event =
  58         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  59   nw_link->state_current = state_initial;
  60   if (state_trace)
  61     nw_link->state_event =
  62         tmgr_history_add_trace(history, state_trace, 0.0, 0, nw_link);
  63
  64   nw_link->constraint =
  65       lmm_constraint_new(maxmin_system, nw_link, nw_link->bw_current);
  66
  67   if(policy == SURF_NETWORK_LINK_FATPIPE)
  68     lmm_constraint_shared(nw_link->constraint);
  69
  70   xbt_dict_set(network_link_set, name, nw_link, network_link_free);
  71
  72   return nw_link;
  73 }
  74
  75 static void network_card_free(void *nw_card)
  76 {
  77   free(((network_card_CM02_t)nw_card)->name);
  78   free(nw_card);
  79 }
  80
  81 static int network_card_new(const char *card_name)
  82 {
  83   network_card_CM02_t card = xbt_dict_get_or_null(network_card_set, card_name);
  84
  85   if (!card) {
  86     card = xbt_new0(s_network_card_CM02_t, 1);
  87     card->name = xbt_strdup(card_name);
  88     card->id = card_number++;
  89     xbt_dict_set(network_card_set, card_name, card, network_card_free);
  90   }
  91   return card->id;
  92 }
  93
  94 static void route_new(int src_id, int dst_id, char **links, int nb_link)
  95 {
  96   network_link_CM02_t *link_list = NULL;
  97   int i;
  98
  99   ROUTE_SIZE(src_id, dst_id) = nb_link;
 100   link_list = (ROUTE(src_id, dst_id) = xbt_new0(network_link_CM02_t, nb_link));
 101   for (i = 0; i < nb_link; i++) {
 102     link_list[i] = xbt_dict_get_or_null(network_link_set, links[i]);
 103     xbt_assert1(link_list[i],"Invalid link name \"%s\"",links[i]);
 104     free(links[i]);
 105   }
 106   free(links);
 107 }
 108
 109 static void parse_network_link(void)
 110 {
 111   char *name;
 112   double bw_initial;
 113   tmgr_trace_t bw_trace;
 114   double lat_initial;
 115   tmgr_trace_t lat_trace;
 116   e_surf_network_link_state_t state_initial = SURF_NETWORK_LINK_ON;
 117   e_surf_network_link_sharing_policy_t policy_initial = SURF_NETWORK_LINK_SHARED;
 118   tmgr_trace_t state_trace;
 119
 120   name = xbt_strdup(A_surfxml_network_link_name);
 121   surf_parse_get_double(&bw_initial,A_surfxml_network_link_bandwidth);
 122   surf_parse_get_trace(&bw_trace, A_surfxml_network_link_bandwidth_file);
 123   surf_parse_get_double(&lat_initial,A_surfxml_network_link_latency);
 124   surf_parse_get_trace(&lat_trace, A_surfxml_network_link_latency_file);
 125
 126   xbt_assert0((A_surfxml_network_link_state==A_surfxml_network_link_state_ON)||
 127               (A_surfxml_network_link_state==A_surfxml_network_link_state_OFF),
 128               "Invalid state");
 129   if (A_surfxml_network_link_state==A_surfxml_network_link_state_ON)
 130     state_initial = SURF_NETWORK_LINK_ON;
 131   else if (A_surfxml_network_link_state==A_surfxml_network_link_state_OFF)
 132     state_initial = SURF_NETWORK_LINK_OFF;
 133
 134   if (A_surfxml_network_link_sharing_policy==A_surfxml_network_link_sharing_policy_SHARED)
 135     policy_initial = SURF_NETWORK_LINK_SHARED;
 136   else if (A_surfxml_network_link_sharing_policy==A_surfxml_network_link_sharing_policy_FATPIPE)
 137     policy_initial = SURF_NETWORK_LINK_FATPIPE;
 138
 139   surf_parse_get_trace(&state_trace,A_surfxml_network_link_state_file);
 140
 141   network_link_new(name, bw_initial, bw_trace,
 142                    lat_initial, lat_trace, state_initial, state_trace,
 143                    policy_initial);
 144 }
 145
 146 static int nb_link;
 147 static int link_name_capacity;
 148 static char **link_name = NULL;
 149 static int src_id = -1;
 150 static int dst_id = -1;
 151
 152 static void parse_route_set_endpoints(void)
 153 {
 154   src_id = network_card_new(A_surfxml_route_src);
 155   dst_id = network_card_new(A_surfxml_route_dst);
 156   nb_link = 0;
 157   link_name_capacity = 16;
 158   link_name = xbt_new(char*, link_name_capacity);
 159 }
 160
 161 static void parse_route_elem(void)
 162 {
 163   if (nb_link == link_name_capacity) {
 164     link_name_capacity *= 2;
 165     link_name = xbt_realloc(link_name, (link_name_capacity) * sizeof(char *));
 166   }
 167   link_name[nb_link++] = xbt_strdup(A_surfxml_route_element_name);
 168 }
 169
 170 static void parse_route_set_route(void)
 171 {
 172   route_new(src_id, dst_id, link_name, nb_link);
 173 }
 174
 175 static void parse_file(const char *file)
 176 {
 177   int i;
 178
 179   /* Figuring out the network links */
 180   surf_parse_reset_parser();
 181   ETag_surfxml_network_link_fun=parse_network_link;
 182   surf_parse_open(file);
 183   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 184   surf_parse_close();
 185
 186   /* Figuring out the network cards used */
 187   surf_parse_reset_parser();
 188   STag_surfxml_route_fun=parse_route_set_endpoints;
 189   surf_parse_open(file);
 190   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 191   surf_parse_close();
 192
 193   create_routing_table();
 194
 195   /* Building the routes */
 196   surf_parse_reset_parser();
 197   STag_surfxml_route_fun=parse_route_set_endpoints;
 198   ETag_surfxml_route_element_fun=parse_route_elem;
 199   ETag_surfxml_route_fun=parse_route_set_route;
 200   surf_parse_open(file);
 201   xbt_assert1((!surf_parse()),"Parse error in %s",file);
 202   surf_parse_close();
 203
 204   /* Adding loopback if needed */
 205
 206   for (i = 0; i < card_number; i++)
 207     if(!ROUTE_SIZE(i,i)) {
 208       if(!loopback)
 209         loopback = network_link_new(xbt_strdup("__MSG_loopback__"),
 210                                    498.00, NULL, 0.000015, NULL,
 211                                    SURF_NETWORK_LINK_ON, NULL,
 212                                    SURF_NETWORK_LINK_FATPIPE);
 213       ROUTE_SIZE(i,i)=1;
 214       ROUTE(i,i) = xbt_new0(network_link_CM02_t, 1);
 215       ROUTE(i,i)[0] = loopback;
 216     }
 217 }
 218
 219 static void *name_service(const char *name)
 220 {
 221   network_card_CM02_t card = xbt_dict_get_or_null(network_card_set, name);
 222   return card;
 223 }
 224
 225 static const char *get_resource_name(void *resource_id)
 226 {
 227   return ((network_card_CM02_t) resource_id)->name;
 228 }
 229
 230 static int resource_used(void *resource_id)
 231 {
 232   return lmm_constraint_used(maxmin_system,
 233                              ((network_link_CM02_t) resource_id)->constraint);
 234 }
 235
 236 static int action_free(surf_action_t action)
 237 {
 238   action->using--;
 239   if(!action->using) {
 240     xbt_swag_remove(action, action->state_set);
 241     if(((surf_action_network_CM02_t)action)->variable)
 242       lmm_variable_free(maxmin_system, ((surf_action_network_CM02_t)action)->variable);
 243     free(action);
 244     return 1;
 245   }
 246   return 0;
 247 }
 248
 249 static void action_use(surf_action_t action)
 250 {
 251   action->using++;
 252 }
 253
 254 static void action_cancel(surf_action_t action)
 255 {
 256   return;
 257 }
 258
 259 static void action_recycle(surf_action_t action)
 260 {
 261   return;
 262 }
 263
 264 static void action_change_state(surf_action_t action,
 265                                 e_surf_action_state_t state)
 266 {
 267 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 268 /*     if(((surf_action_network_CM02_t)action)->variable) { */
 269 /*       lmm_variable_disable(maxmin_system, ((surf_action_network_CM02_t)action)->variable); */
 270 /*       ((surf_action_network_CM02_t)action)->variable = NULL; */
 271 /*     } */
 272
 273   surf_action_change_state(action, state);
 274   return;
 275 }
 276
 277 static double share_resources(double now)
 278 {
 279   s_surf_action_network_CM02_t s_action;
 280   surf_action_network_CM02_t action = NULL;
 281   xbt_swag_t running_actions = surf_network_resource->common_public->states.running_action_set;
 282   double min = generic_maxmin_share_resources(running_actions,
 283                                               xbt_swag_offset(s_action, variable));
 284
 285   xbt_swag_foreach(action, running_actions) {
 286     if(action->latency>0) {
 287       if(min<0) min = action->latency;
 288       else if (action->latency<min) min = action->latency;
 289     }
 290   }
 291
 292   return min;
 293 }
 294
 295 static void update_actions_state(double now, double delta)
 296 {
 297   double deltap = 0.0;
 298   surf_action_network_CM02_t action = NULL;
 299   surf_action_network_CM02_t next_action = NULL;
 300   xbt_swag_t running_actions =
 301       surf_network_resource->common_public->states.running_action_set;
 302   /*
 303   xbt_swag_t failed_actions =
 304       surf_network_resource->common_public->states.failed_action_set;
 305   */
 306
 307   xbt_swag_foreach_safe(action, next_action, running_actions) {
 308     deltap = delta;
 309     if (action->latency > 0) {
 310       if (action->latency > deltap) {
 311         surf_double_update(&(action->latency),deltap);
 312         deltap = 0.0;
 313       } else {
 314         surf_double_update(&(deltap), action->latency);
 315         action->latency = 0.0;
 316       }
 317       if ((action->latency == 0.0) && !(action->suspended))
 318         lmm_update_variable_weight(maxmin_system, action->variable,
 319                                    action->lat_current);
 320     }
 321     surf_double_update(&(action->generic_action.remains),
 322         lmm_variable_getvalue(action->variable) * deltap);
 323     if (action->generic_action.max_duration != NO_MAX_DURATION)
 324       surf_double_update(&(action->generic_action.max_duration), delta);
 325
 326     /*   if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 327
 328     if ((action->generic_action.remains <= 0) &&
 329         (lmm_get_variable_weight(action->variable)>0)) {
 330       action->generic_action.finish = surf_get_clock();
 331       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 332     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 333                (action->generic_action.max_duration <= 0)) {
 334       action->generic_action.finish = surf_get_clock();
 335       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 336     } else {                    /* Need to check that none of the resource has failed */
 337       lmm_constraint_t cnst = NULL;
 338       int i = 0;
 339       network_link_CM02_t nw_link = NULL;
 340
 341       while ((cnst =
 342               lmm_get_cnst_from_var(maxmin_system, action->variable,
 343                                     i++))) {
 344         nw_link = lmm_constraint_id(cnst);
 345         if (nw_link->state_current == SURF_NETWORK_LINK_OFF) {
 346           action->generic_action.finish = surf_get_clock();
 347           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 348           break;
 349         }
 350       }
 351     }
 352   }
 353
 354   return;
 355 }
 356
 357 static void update_resource_state(void *id,
 358                                   tmgr_trace_event_t event_type,
 359                                   double value)
 360 {
 361   network_link_CM02_t nw_link = id;
 362   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 363   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 364   /*     value, event_type); */
 365
 366   if (event_type == nw_link->bw_event) {
 367     nw_link->bw_current = value;
 368     lmm_update_constraint_bound(maxmin_system, nw_link->constraint,
 369                                 nw_link->bw_current);
 370   } else if (event_type == nw_link->lat_event) {
 371     double delta = value - nw_link->lat_current;
 372     lmm_variable_t var = NULL;
 373     surf_action_network_CM02_t action = NULL;
 374
 375     nw_link->lat_current = value;
 376     while (lmm_get_var_from_cnst(maxmin_system, nw_link->constraint, &var)) {
 377       action = lmm_variable_id(var);
 378       action->lat_current += delta;
 379       if(action->rate<0)
 380         lmm_update_variable_bound(maxmin_system, action->variable,
 381                                   SG_TCP_CTE_GAMMA / (2.0 * action->lat_current));
 382       else
 383         lmm_update_variable_bound(maxmin_system, action->variable,
 384                                   min(action->rate,SG_TCP_CTE_GAMMA / (2.0 * action->lat_current)));
 385       if(!(action->suspended))
 386         lmm_update_variable_weight(maxmin_system, action->variable,
 387                                    action->lat_current);
 388     }
 389   } else if (event_type == nw_link->state_event) {
 390     if (value > 0)
 391       nw_link->state_current = SURF_NETWORK_LINK_ON;
 392     else
 393       nw_link->state_current = SURF_NETWORK_LINK_OFF;
 394   } else {
 395     CRITICAL0("Unknown event ! \n");
 396     xbt_abort();
 397   }
 398
 399   return;
 400 }
 401
 402 static surf_action_t communicate(void *src, void *dst, double size, double rate)
 403 {
 404   surf_action_network_CM02_t action = NULL;
 405   network_card_CM02_t card_src = src;
 406   network_card_CM02_t card_dst = dst;
 407   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 408   network_link_CM02_t *route = ROUTE(card_src->id, card_dst->id);
 409   int i;
 410
 411   XBT_IN4("(%s,%s,%g,%g)",card_src->name,card_dst->name,size,rate);
 412   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);
 413
 414   action = xbt_new0(s_surf_action_network_CM02_t, 1);
 415
 416   action->generic_action.using = 1;
 417   action->generic_action.cost = size;
 418   action->generic_action.remains = size;
 419   action->generic_action.max_duration = NO_MAX_DURATION;
 420   action->generic_action.start = surf_get_clock();
 421   action->generic_action.finish = -1.0;
 422   action->generic_action.resource_type =
 423       (surf_resource_t) surf_network_resource;
 424   action->suspended = 0;  /* Should be useless because of the
 425                              calloc but it seems to help valgrind... */
 426   action->generic_action.state_set =
 427       surf_network_resource->common_public->states.running_action_set;
 428
 429   xbt_swag_insert(action, action->generic_action.state_set);
 430   action->rate = rate;
 431
 432   action->latency = 0.0;
 433   for (i = 0; i < route_size; i++)
 434     action->latency += route[i]->lat_current;
 435   action->lat_current = action->latency;
 436
 437   if(action->latency>0)
 438     action->variable = lmm_variable_new(maxmin_system, action, 0.0, -1.0,
 439                                         route_size);
 440   else
 441     action->variable = lmm_variable_new(maxmin_system, action, 1.0, -1.0,
 442                                         route_size);
 443
 444   if(action->rate<0) {
 445     if(action->lat_current>0)
 446       lmm_update_variable_bound(maxmin_system, action->variable,
 447                                 SG_TCP_CTE_GAMMA / (2.0 * action->lat_current));
 448     else
 449       lmm_update_variable_bound(maxmin_system, action->variable, -1.0);
 450   } else {
 451     if(action->lat_current>0)
 452       lmm_update_variable_bound(maxmin_system, action->variable,
 453                                 min(action->rate,SG_TCP_CTE_GAMMA / (2.0 * action->lat_current)));
 454     else
 455       lmm_update_variable_bound(maxmin_system, action->variable, action->rate);
 456   }
 457
 458   for (i = 0; i < route_size; i++)
 459     lmm_expand(maxmin_system, route[i]->constraint, action->variable, 1.0);
 460   XBT_OUT;
 461
 462   return (surf_action_t) action;
 463 }
 464
 465 /* returns an array of network_link_CM02_t */
 466 static const void** get_route(void *src, void *dst) {
 467   network_card_CM02_t card_src = src;
 468   network_card_CM02_t card_dst = dst;
 469   return (const void**) ROUTE(card_src->id, card_dst->id);
 470 }
 471
 472 static int get_route_size(void *src, void *dst) {
 473   network_card_CM02_t card_src = src;
 474   network_card_CM02_t card_dst = dst;
 475   return ROUTE_SIZE(card_src->id, card_dst->id);
 476 }
 477
 478 static const char *get_link_name(const void *link) {
 479   return ((network_link_CM02_t) link)->name;
 480 }
 481
 482 static double get_link_bandwidth(const void *link) {
 483   return ((network_link_CM02_t) link)->bw_current;
 484 }
 485
 486 static double get_link_latency(const void *link) {
 487   return ((network_link_CM02_t) link)->lat_current;
 488 }
 489
 490 static void action_suspend(surf_action_t action)
 491 {
 492   ((surf_action_network_CM02_t) action)->suspended = 1;
 493   lmm_update_variable_weight(maxmin_system,
 494                              ((surf_action_network_CM02_t) action)->variable, 0.0);
 495 }
 496
 497 static void action_resume(surf_action_t action)
 498 {
 499   lmm_update_variable_weight(maxmin_system,
 500                              ((surf_action_network_CM02_t) action)->variable,
 501                              ((surf_action_network_CM02_t) action)->lat_current);
 502   ((surf_action_network_CM02_t) action)->suspended = 0;
 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   xbt_assert0(maxmin_system, "surf_init has to be called first!");
 611 }
 612
 613 /***************************************************************************/
 614 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 615 /***************************************************************************/
 616 /* @TechReport{      rr-lip2002-40, */
 617 /*   author        = {Henri Casanova and Loris Marchal}, */
 618 /*   institution   = {LIP}, */
 619 /*   title         = {A Network Model for Simulation of Grid Application}, */
 620 /*   number        = {2002-40}, */
 621 /*   month         = {oct}, */
 622 /*   year          = {2002} */
 623 /* } */
 624 void surf_network_resource_init_CM02(const char *filename)
 625 {
 626   if (surf_network_resource)
 627     return;
 628   surf_network_resource_init_internal();
 629   parse_file(filename);
 630   xbt_dynar_push(resource_list, &surf_network_resource);
 631 }