src/surf/network_constant.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 "surf_private.h"
   9 #include "xbt/dict.h"
  10 #include "xbt/str.h"
  11 #include "xbt/log.h"
  12
  13 typedef struct network_card_Constant {
  14   char *name;
  15   int id;
  16 } s_network_card_Constant_t, *network_card_Constant_t;
  17
  18 typedef struct network_link_Constant {
  19   surf_model_t model;   /* Any such object, added in a trace
  20                                    should start by this field!!! */
  21   xbt_dict_t properties;
  22   /* Using this object with the public part of
  23      model does not make sense */
  24   char *name;
  25   double bw_current;
  26   tmgr_trace_event_t bw_event;
  27   double lat_current;
  28   tmgr_trace_event_t lat_event;
  29   e_surf_link_state_t state_current;
  30   tmgr_trace_event_t state_event;
  31   lmm_constraint_t constraint;
  32 } s_link_Constant_t, *link_Constant_t;
  33
  34 typedef struct surf_action_network_Constant {
  35   s_surf_action_t generic_action;
  36   double latency;
  37   double lat_current;
  38   lmm_variable_t variable;
  39   double rate;
  40   int suspended;
  41   network_card_Constant_t src;
  42   network_card_Constant_t dst;
  43 } s_surf_action_network_Constant_t, *surf_action_network_Constant_t;
  44
  45 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  46
  47 static lmm_system_t network_maxmin_system = NULL;
  48 static void (*network_solve) (lmm_system_t) = NULL;
  49
  50 static xbt_dict_t network_card_set = NULL;
  51
  52 static int card_number = 0;
  53 static int host_number = 0;
  54 static link_Constant_t **routing_table = NULL;
  55 static int *routing_table_size = NULL;
  56 static link_Constant_t loopback = NULL;
  57
  58 #define ROUTE(i,j) routing_table[(i)+(j)*card_number]
  59 #define ROUTE_SIZE(i,j) routing_table_size[(i)+(j)*card_number]
  60
  61 static void create_routing_table(void)
  62 {
  63   routing_table =
  64       xbt_new0(link_Constant_t *, /*card_number * card_number */ host_number * host_number);
  65   routing_table_size = xbt_new0(int, /*card_number * card_number*/ host_number * host_number);
  66 }
  67
  68 static void link_free(void *nw_link)
  69 {
  70   free(((link_Constant_t) nw_link)->name);
  71   free(nw_link);
  72 }
  73
  74 static link_Constant_t link_new(char *name,
  75                             double bw_initial,
  76                             tmgr_trace_t bw_trace,
  77                             double lat_initial,
  78                             tmgr_trace_t lat_trace,
  79                             e_surf_link_state_t
  80                             state_initial,
  81                             tmgr_trace_t state_trace,
  82                             e_surf_link_sharing_policy_t
  83                             policy, xbt_dict_t properties)
  84 {
  85   link_Constant_t nw_link = xbt_new0(s_link_Constant_t, 1);
  86   xbt_assert1(!xbt_dict_get_or_null(link_set, name),
  87               "Link '%s' declared several times in the platform file.", name);
  88
  89   nw_link->model = (surf_model_t) surf_network_model;
  90   nw_link->name = name;
  91   nw_link->bw_current = bw_initial;
  92   if (bw_trace)
  93     nw_link->bw_event =
  94         tmgr_history_add_trace(history, bw_trace, 0.0, 0, nw_link);
  95   nw_link->lat_current = lat_initial;
  96   if (lat_trace)
  97     nw_link->lat_event =
  98         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  99   nw_link->state_current = state_initial;
 100   if (state_trace)
 101     nw_link->state_event =
 102         tmgr_history_add_trace(history, state_trace, 0.0, 0, nw_link);
 103
 104   nw_link->constraint =
 105       lmm_constraint_new(network_maxmin_system, nw_link,
 106                          nw_link->bw_current);
 107
 108   if (policy == SURF_LINK_FATPIPE)
 109     lmm_constraint_shared(nw_link->constraint);
 110
 111   nw_link->properties = properties;
 112
 113   current_property_set = properties;
 114
 115   xbt_dict_set(link_set, name, nw_link, link_free);
 116
 117   return nw_link;
 118 }
 119
 120 static void network_card_free(void *nw_card)
 121 {
 122   free(((network_card_Constant_t) nw_card)->name);
 123   free(nw_card);
 124 }
 125
 126 static int network_card_new(const char *card_name)
 127 {
 128   network_card_Constant_t card =
 129       xbt_dict_get_or_null(network_card_set, card_name);
 130
 131   if (!card) {
 132     card = xbt_new0(s_network_card_Constant_t, 1);
 133     card->name = xbt_strdup(card_name);
 134     card->id = card_number++;
 135     xbt_dict_set(network_card_set, card_name, card, network_card_free);
 136   }
 137   return card->id;
 138 }
 139
 140 static void route_new(int src_id, int dst_id,
 141                       link_Constant_t * link_list, int nb_link)
 142 {
 143   ROUTE_SIZE(src_id, dst_id) = nb_link;
 144   ROUTE(src_id, dst_id) = link_list =
 145       xbt_realloc(link_list, sizeof(link_Constant_t) * nb_link);
 146 }
 147
 148 static void parse_link_init(void)
 149 {
 150   char *name_link;
 151   double bw_initial;
 152   tmgr_trace_t bw_trace;
 153   double lat_initial;
 154   tmgr_trace_t lat_trace;
 155   e_surf_link_state_t state_initial_link = SURF_LINK_ON;
 156   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 157   tmgr_trace_t state_trace;
 158
 159   name_link = xbt_strdup(A_surfxml_link_id);
 160   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 161   surf_parse_get_trace(&bw_trace, A_surfxml_link_bandwidth_file);
 162   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 163   surf_parse_get_trace(&lat_trace, A_surfxml_link_latency_file);
 164
 165   xbt_assert0((A_surfxml_link_state ==
 166                A_surfxml_link_state_ON)
 167               || (A_surfxml_link_state ==
 168                   A_surfxml_link_state_OFF), "Invalid state");
 169   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 170     state_initial_link = SURF_LINK_ON;
 171   else if (A_surfxml_link_state ==
 172            A_surfxml_link_state_OFF)
 173     state_initial_link = SURF_LINK_OFF;
 174
 175   if (A_surfxml_link_sharing_policy ==
 176       A_surfxml_link_sharing_policy_SHARED)
 177     policy_initial_link = SURF_LINK_SHARED;
 178   else if (A_surfxml_link_sharing_policy ==
 179            A_surfxml_link_sharing_policy_FATPIPE)
 180     policy_initial_link = SURF_LINK_FATPIPE;
 181
 182   surf_parse_get_trace(&state_trace, A_surfxml_link_state_file);
 183
 184   link_new(name_link, bw_initial, bw_trace,
 185                    lat_initial, lat_trace, state_initial_link, state_trace,
 186                    policy_initial_link, xbt_dict_new());
 187
 188 }
 189
 190 static int src_id = -1;
 191 static int dst_id = -1;
 192
 193 static void parse_route_set_endpoints(void)
 194 {
 195   src_id = network_card_new(A_surfxml_route_src);
 196   dst_id = network_card_new(A_surfxml_route_dst);
 197   route_action = A_surfxml_route_action;
 198   route_link_list = xbt_dynar_new(sizeof(char *), &free_string);
 199 }
 200
 201 static void parse_route_set_route(void)
 202 {
 203   char *name;
 204   if (src_id != -1 && dst_id != -1) {
 205     name = bprintf("%x#%x",src_id, dst_id);
 206     manage_route(route_table, name, route_action, 0);
 207     free(name);
 208   }
 209 }
 210
 211 static void add_loopback(void)
 212 {
 213   int i;
 214   /* Adding loopback if needed */
 215   for (i = 0; i < host_number; i++)
 216     if (!ROUTE_SIZE(i, i)) {
 217       if (!loopback)
 218         loopback = link_new(xbt_strdup("__MSG_loopback__"),
 219                                     498000000, NULL, 0.000015, NULL,
 220                                     SURF_LINK_ON, NULL,
 221                                     SURF_LINK_FATPIPE,NULL);
 222       ROUTE_SIZE(i, i) = 1;
 223       ROUTE(i, i) = xbt_new0(link_Constant_t, 1);
 224       ROUTE(i, i)[0] = loopback;
 225     }
 226 }
 227
 228 static void add_route(void)
 229 {
 230   xbt_ex_t e;
 231   int nb_link = 0;
 232   unsigned int cpt = 0;
 233   int link_list_capacity = 0;
 234   link_Constant_t *link_list = NULL;
 235   xbt_dict_cursor_t cursor = NULL;
 236   char *key,*data, *end;
 237   const char *sep = "#";
 238   xbt_dynar_t links, keys;
 239
 240   if (routing_table == NULL) create_routing_table();
 241
 242   xbt_dict_foreach(route_table, cursor, key, data) {
 243           char* link = NULL;
 244     nb_link = 0;
 245     links = (xbt_dynar_t)data;
 246     keys = xbt_str_split_str(key, sep);
 247
 248     link_list_capacity = xbt_dynar_length(links);
 249     link_list = xbt_new(link_Constant_t, link_list_capacity);
 250
 251     src_id = strtol(xbt_dynar_get_as(keys, 0, char*), &end, 16);
 252     dst_id = strtol(xbt_dynar_get_as(keys, 1, char*), &end, 16);
 253
 254     xbt_dynar_foreach (links, cpt, link) {
 255       TRY {
 256         link_list[nb_link++] = xbt_dict_get(link_set, link);
 257       }
 258       CATCH(e) {
 259         RETHROW1("Link %s not found (dict raised this exception: %s)", link);
 260       }
 261     }
 262     route_new(src_id, dst_id, link_list, nb_link);
 263    }
 264
 265    xbt_dict_free(&route_table);
 266
 267 }
 268
 269 static void count_hosts(void)
 270 {
 271    host_number++;
 272 }
 273
 274
 275 static void add_traces(void) {
 276    xbt_dict_cursor_t cursor=NULL;
 277    char *trace_name,*elm;
 278
 279    static int called = 0;
 280    if (called) return;
 281    called = 1;
 282
 283    /* connect all traces relative to network */
 284    xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 285       tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 286       link_Constant_t link = xbt_dict_get_or_null(link_set, elm);
 287
 288       xbt_assert1(link, "Link %s undefined", elm);
 289       xbt_assert1(trace, "Trace %s undefined", trace_name);
 290
 291       link->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 292    }
 293
 294    xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 295       tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 296       link_Constant_t link = xbt_dict_get_or_null(link_set, elm);
 297
 298       xbt_assert1(link, "Link %s undefined", elm);
 299       xbt_assert1(trace, "Trace %s undefined", trace_name);
 300
 301       link->bw_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 302    }
 303
 304    xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 305       tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 306       link_Constant_t link = xbt_dict_get_or_null(link_set, elm);
 307
 308       xbt_assert1(link, "Link %s undefined", elm);
 309       xbt_assert1(trace, "Trace %s undefined", trace_name);
 310
 311       link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 312    }
 313
 314    xbt_dict_free(&trace_connect_list_host_avail);
 315    xbt_dict_free(&trace_connect_list_power);
 316    xbt_dict_free(&trace_connect_list_link_avail);
 317    xbt_dict_free(&trace_connect_list_bandwidth);
 318    xbt_dict_free(&trace_connect_list_latency);
 319
 320    xbt_dict_free(&traces_set_list);
 321 }
 322
 323 static void define_callbacks(const char *file)
 324 {
 325   /* Figuring out the network links */
 326   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
 327   surfxml_add_callback(STag_surfxml_link_cb_list, &parse_link_init);
 328   surfxml_add_callback(STag_surfxml_prop_cb_list, &parse_properties);
 329   surfxml_add_callback(STag_surfxml_route_cb_list, &parse_route_set_endpoints);
 330   surfxml_add_callback(ETag_surfxml_link_c_ctn_cb_list, &parse_route_elem);
 331   surfxml_add_callback(ETag_surfxml_route_cb_list, &parse_route_set_route);
 332   surfxml_add_callback(STag_surfxml_platform_cb_list, &init_data);
 333   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces);
 334   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_route);
 335   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_loopback);
 336   surfxml_add_callback(STag_surfxml_set_cb_list, &parse_sets);
 337   surfxml_add_callback(STag_surfxml_route_c_multi_cb_list, &parse_route_multi_set_endpoints);
 338   surfxml_add_callback(ETag_surfxml_route_c_multi_cb_list, &parse_route_multi_set_route);
 339   surfxml_add_callback(STag_surfxml_foreach_cb_list, &parse_foreach);
 340   surfxml_add_callback(STag_surfxml_cluster_cb_list, &parse_cluster);
 341   surfxml_add_callback(STag_surfxml_trace_cb_list, &parse_trace_init);
 342   surfxml_add_callback(ETag_surfxml_trace_cb_list, &parse_trace_finalize);
 343   surfxml_add_callback(STag_surfxml_trace_c_connect_cb_list, &parse_trace_c_connect);
 344 }
 345
 346 static void *name_service(const char *name)
 347 {
 348   network_card_Constant_t card = xbt_dict_get_or_null(network_card_set, name);
 349   return card;
 350 }
 351
 352 static const char *get_resource_name(void *resource_id)
 353 {
 354   return ((network_card_Constant_t) resource_id)->name;
 355 }
 356
 357 static int resource_used(void *resource_id)
 358 {
 359   return lmm_constraint_used(network_maxmin_system,
 360                              ((link_Constant_t) resource_id)->
 361                              constraint);
 362 }
 363
 364 static int action_free(surf_action_t action)
 365 {
 366   action->using--;
 367   if (!action->using) {
 368     xbt_swag_remove(action, action->state_set);
 369     if (((surf_action_network_Constant_t) action)->variable)
 370       lmm_variable_free(network_maxmin_system,
 371                         ((surf_action_network_Constant_t) action)->variable);
 372     free(action);
 373     return 1;
 374   }
 375   return 0;
 376 }
 377
 378 static void action_use(surf_action_t action)
 379 {
 380   action->using++;
 381 }
 382
 383 static void action_cancel(surf_action_t action)
 384 {
 385   return;
 386 }
 387
 388 static void action_recycle(surf_action_t action)
 389 {
 390   return;
 391 }
 392
 393 static void action_change_state(surf_action_t action,
 394                                 e_surf_action_state_t state)
 395 {
 396 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 397 /*     if(((surf_action_network_Constant_t)action)->variable) { */
 398 /*       lmm_variable_disable(network_maxmin_system, ((surf_action_network_Constant_t)action)->variable); */
 399 /*       ((surf_action_network_Constant_t)action)->variable = NULL; */
 400 /*     } */
 401
 402   surf_action_change_state(action, state);
 403   return;
 404 }
 405
 406 static double share_resources(double now)
 407 {
 408   s_surf_action_network_Constant_t s_action;
 409   surf_action_network_Constant_t action = NULL;
 410   xbt_swag_t running_actions =
 411       surf_network_model->common_public->states.running_action_set;
 412   double min;
 413
 414   min = generic_maxmin_share_resources(running_actions,
 415                                        xbt_swag_offset(s_action,
 416                                                        variable),
 417                                        network_maxmin_system,
 418                                        network_solve);
 419
 420   xbt_swag_foreach(action, running_actions) {
 421     if (action->latency > 0) {
 422       if (min < 0)
 423         min = action->latency;
 424       else if (action->latency < min)
 425         min = action->latency;
 426     }
 427   }
 428
 429   return min;
 430 }
 431
 432 static void update_actions_state(double now, double delta)
 433 {
 434   double deltap = 0.0;
 435   surf_action_network_Constant_t action = NULL;
 436   surf_action_network_Constant_t next_action = NULL;
 437   xbt_swag_t running_actions =
 438       surf_network_model->common_public->states.running_action_set;
 439   /*
 440      xbt_swag_t failed_actions =
 441      surf_network_model->common_public->states.failed_action_set;
 442    */
 443
 444   xbt_swag_foreach_safe(action, next_action, running_actions) {
 445     deltap = delta;
 446     if (action->latency > 0) {
 447       if (action->latency > deltap) {
 448         double_update(&(action->latency), deltap);
 449         deltap = 0.0;
 450       } else {
 451         double_update(&(deltap), action->latency);
 452         action->latency = 0.0;
 453       }
 454       if ((action->latency == 0.0) && !(action->suspended))
 455         lmm_update_variable_weight(network_maxmin_system, action->variable,
 456                                    action->lat_current);
 457     }
 458     double_update(&(action->generic_action.remains),
 459                   lmm_variable_getvalue(action->variable) * deltap);
 460     if (action->generic_action.max_duration != NO_MAX_DURATION)
 461       double_update(&(action->generic_action.max_duration), delta);
 462
 463     /*   if(action->generic_action.remains<.00001) action->generic_action.remains=0; */
 464
 465     if ((action->generic_action.remains <= 0) &&
 466         (lmm_get_variable_weight(action->variable) > 0)) {
 467       action->generic_action.finish = surf_get_clock();
 468       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 469     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 470                (action->generic_action.max_duration <= 0)) {
 471       action->generic_action.finish = surf_get_clock();
 472       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 473     } else {                    /* Need to check that none of the model has failed */
 474       lmm_constraint_t cnst = NULL;
 475       int i = 0;
 476       link_Constant_t nw_link = NULL;
 477
 478       while ((cnst =
 479               lmm_get_cnst_from_var(network_maxmin_system,
 480                                     action->variable, i++))) {
 481         nw_link = lmm_constraint_id(cnst);
 482         if (nw_link->state_current == SURF_LINK_OFF) {
 483           action->generic_action.finish = surf_get_clock();
 484           action_change_state((surf_action_t) action, SURF_ACTION_FAILED);
 485           break;
 486         }
 487       }
 488     }
 489   }
 490
 491   return;
 492 }
 493
 494 static void update_resource_state(void *id,
 495                                   tmgr_trace_event_t event_type,
 496                                   double value)
 497 {
 498   link_Constant_t nw_link = id;
 499   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 500   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 501   /*     value, event_type); */
 502
 503   if (event_type == nw_link->bw_event) {
 504     nw_link->bw_current = value;
 505     lmm_update_constraint_bound(network_maxmin_system, nw_link->constraint,
 506                                 nw_link->bw_current);
 507   } else if (event_type == nw_link->lat_event) {
 508     double delta = value - nw_link->lat_current;
 509     lmm_variable_t var = NULL;
 510     surf_action_network_Constant_t action = NULL;
 511
 512     nw_link->lat_current = value;
 513     while (lmm_get_var_from_cnst
 514            (network_maxmin_system, nw_link->constraint, &var)) {
 515       action = lmm_variable_id(var);
 516       action->lat_current += delta;
 517       if (action->rate < 0)
 518         lmm_update_variable_bound(network_maxmin_system, action->variable,
 519                                   SG_TCP_CTE_GAMMA / (2.0 *
 520                                                       action->
 521                                                       lat_current));
 522       else
 523         lmm_update_variable_bound(network_maxmin_system, action->variable,
 524                                   min(action->rate,
 525                                       SG_TCP_CTE_GAMMA / (2.0 *
 526                                                           action->
 527                                                           lat_current)));
 528       if (!(action->suspended))
 529         lmm_update_variable_weight(network_maxmin_system, action->variable,
 530                                    action->lat_current);
 531       lmm_update_variable_latency(network_maxmin_system, action->variable,
 532                                   delta);
 533     }
 534   } else if (event_type == nw_link->state_event) {
 535     if (value > 0)
 536       nw_link->state_current = SURF_LINK_ON;
 537     else
 538       nw_link->state_current = SURF_LINK_OFF;
 539   } else {
 540     CRITICAL0("Unknown event ! \n");
 541     xbt_abort();
 542   }
 543
 544   return;
 545 }
 546
 547 static surf_action_t communicate(void *src, void *dst, double size,
 548                                  double rate)
 549 {
 550   surf_action_network_Constant_t action = NULL;
 551   /* LARGE PLATFORMS HACK:
 552      Add a link_Constant_t *link and a int link_nb to network_card_Constant_t. It will represent local links for this node
 553      Use the cluster_id for ->id */
 554   network_card_Constant_t card_src = src;
 555   network_card_Constant_t card_dst = dst;
 556   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 557   link_Constant_t *route = ROUTE(card_src->id, card_dst->id);
 558   /* LARGE PLATFORMS HACK:
 559      total_route_size = route_size + src->link_nb + dst->nb */
 560   int i;
 561
 562   XBT_IN4("(%s,%s,%g,%g)", card_src->name, card_dst->name, size, rate);
 563   /* LARGE PLATFORMS HACK:
 564      assert on total_route_size */
 565   xbt_assert2(route_size,
 566               "You're trying to send data from %s to %s but there is no connexion between these two cards.",
 567               card_src->name, card_dst->name);
 568
 569   action = xbt_new0(s_surf_action_network_Constant_t, 1);
 570
 571   action->generic_action.using = 1;
 572   action->generic_action.cost = size;
 573   action->generic_action.remains = size;
 574   action->generic_action.max_duration = NO_MAX_DURATION;
 575   action->generic_action.start = surf_get_clock();
 576   action->generic_action.finish = -1.0;
 577   action->generic_action.model_type =
 578       (surf_model_t) surf_network_model;
 579   action->suspended = 0;
 580   action->generic_action.state_set =
 581       surf_network_model->common_public->states.running_action_set;
 582
 583   xbt_swag_insert(action, action->generic_action.state_set);
 584   action->rate = rate;
 585
 586   action->latency = 0.0;
 587   for (i = 0; i < route_size; i++)
 588     action->latency += route[i]->lat_current;
 589   /* LARGE PLATFORMS HACK:
 590      Add src->link and dst->link latencies */
 591   action->lat_current = action->latency;
 592
 593   /* LARGE PLATFORMS HACK:
 594      lmm_variable_new(..., total_route_size)*/
 595   if (action->latency > 0)
 596     action->variable =
 597         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 598                          route_size);
 599   else
 600     action->variable =
 601         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 602                          route_size);
 603
 604   if (action->rate < 0) {
 605     if (action->lat_current > 0)
 606       lmm_update_variable_bound(network_maxmin_system, action->variable,
 607                                 SG_TCP_CTE_GAMMA / (2.0 *
 608                                                     action->lat_current));
 609     else
 610       lmm_update_variable_bound(network_maxmin_system, action->variable,
 611                                 -1.0);
 612   } else {
 613     if (action->lat_current > 0)
 614       lmm_update_variable_bound(network_maxmin_system, action->variable,
 615                                 min(action->rate,
 616                                     SG_TCP_CTE_GAMMA / (2.0 *
 617                                                         action->
 618                                                         lat_current)));
 619     else
 620       lmm_update_variable_bound(network_maxmin_system, action->variable,
 621                                 action->rate);
 622   }
 623   lmm_update_variable_latency(network_maxmin_system, action->variable,
 624                               action->latency);
 625
 626   for (i = 0; i < route_size; i++)
 627     lmm_expand(network_maxmin_system, route[i]->constraint,
 628                action->variable, 1.0);
 629   /* LARGE PLATFORMS HACK:
 630      expand also with src->link and dst->link */
 631
 632   XBT_OUT;
 633
 634   return (surf_action_t) action;
 635 }
 636
 637 /* returns an array of link_Constant_t */
 638 static const void **get_route(void *src, void *dst)
 639 {
 640   network_card_Constant_t card_src = src;
 641   network_card_Constant_t card_dst = dst;
 642   return (const void **) ROUTE(card_src->id, card_dst->id);
 643 }
 644
 645 static int get_route_size(void *src, void *dst)
 646 {
 647   network_card_Constant_t card_src = src;
 648   network_card_Constant_t card_dst = dst;
 649   return ROUTE_SIZE(card_src->id, card_dst->id);
 650 }
 651
 652 static const char *get_link_name(const void *link)
 653 {
 654   return ((link_Constant_t) link)->name;
 655 }
 656
 657 static double get_link_bandwidth(const void *link)
 658 {
 659   return ((link_Constant_t) link)->bw_current;
 660 }
 661
 662 static double get_link_latency(const void *link)
 663 {
 664   return ((link_Constant_t) link)->lat_current;
 665 }
 666
 667 static xbt_dict_t get_properties(void *link)
 668 {
 669  return ((link_Constant_t) link)->properties;
 670 }
 671
 672 static void action_suspend(surf_action_t action)
 673 {
 674   ((surf_action_network_Constant_t) action)->suspended = 1;
 675   lmm_update_variable_weight(network_maxmin_system,
 676                              ((surf_action_network_Constant_t) action)->
 677                              variable, 0.0);
 678 }
 679
 680 static void action_resume(surf_action_t action)
 681 {
 682   if (((surf_action_network_Constant_t) action)->suspended) {
 683     lmm_update_variable_weight(network_maxmin_system,
 684                                ((surf_action_network_Constant_t) action)->
 685                                variable,
 686                                ((surf_action_network_Constant_t) action)->
 687                                lat_current);
 688     ((surf_action_network_Constant_t) action)->suspended = 0;
 689   }
 690 }
 691
 692 static int action_is_suspended(surf_action_t action)
 693 {
 694   return ((surf_action_network_Constant_t) action)->suspended;
 695 }
 696
 697 static void action_set_max_duration(surf_action_t action, double duration)
 698 {
 699   action->max_duration = duration;
 700 }
 701
 702 static void finalize(void)
 703 {
 704   int i, j;
 705
 706   xbt_dict_free(&network_card_set);
 707   xbt_dict_free(&link_set);
 708   xbt_swag_free(surf_network_model->common_public->states.
 709                 ready_action_set);
 710   xbt_swag_free(surf_network_model->common_public->states.
 711                 running_action_set);
 712   xbt_swag_free(surf_network_model->common_public->states.
 713                 failed_action_set);
 714   xbt_swag_free(surf_network_model->common_public->states.
 715                 done_action_set);
 716   free(surf_network_model->common_public);
 717   free(surf_network_model->common_private);
 718   free(surf_network_model->extension_public);
 719
 720   free(surf_network_model);
 721   surf_network_model = NULL;
 722
 723   loopback = NULL;
 724   for (i = 0; i < card_number; i++)
 725     for (j = 0; j < card_number; j++)
 726       free(ROUTE(i, j));
 727   free(routing_table);
 728   routing_table = NULL;
 729   free(routing_table_size);
 730   routing_table_size = NULL;
 731   card_number = 0;
 732 }
 733
 734 static void surf_network_model_init_internal(void)
 735 {
 736   s_surf_action_t action;
 737
 738   surf_network_model = xbt_new0(s_surf_network_model_t, 1);
 739
 740   surf_network_model->common_private =
 741       xbt_new0(s_surf_model_private_t, 1);
 742   surf_network_model->common_public =
 743       xbt_new0(s_surf_model_public_t, 1);
 744   surf_network_model->extension_public =
 745       xbt_new0(s_surf_network_model_extension_public_t, 1);
 746
 747   surf_network_model->common_public->states.ready_action_set =
 748       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 749   surf_network_model->common_public->states.running_action_set =
 750       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 751   surf_network_model->common_public->states.failed_action_set =
 752       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 753   surf_network_model->common_public->states.done_action_set =
 754       xbt_swag_new(xbt_swag_offset(action, state_hookup));
 755
 756   surf_network_model->common_public->name_service = name_service;
 757   surf_network_model->common_public->get_resource_name =
 758       get_resource_name;
 759   surf_network_model->common_public->action_get_state =
 760       surf_action_get_state;
 761   surf_network_model->common_public->action_get_start_time =
 762       surf_action_get_start_time;
 763   surf_network_model->common_public->action_get_finish_time =
 764       surf_action_get_finish_time;
 765   surf_network_model->common_public->action_free = action_free;
 766   surf_network_model->common_public->action_use = action_use;
 767   surf_network_model->common_public->action_cancel = action_cancel;
 768   surf_network_model->common_public->action_recycle = action_recycle;
 769   surf_network_model->common_public->action_change_state =
 770       action_change_state;
 771   surf_network_model->common_public->action_set_data =
 772       surf_action_set_data;
 773   surf_network_model->common_public->name = "network";
 774
 775   surf_network_model->common_private->resource_used = resource_used;
 776   surf_network_model->common_private->share_resources = share_resources;
 777   surf_network_model->common_private->update_actions_state =
 778       update_actions_state;
 779   surf_network_model->common_private->update_resource_state =
 780       update_resource_state;
 781   surf_network_model->common_private->finalize = finalize;
 782
 783   surf_network_model->common_public->suspend = action_suspend;
 784   surf_network_model->common_public->resume = action_resume;
 785   surf_network_model->common_public->is_suspended = action_is_suspended;
 786   surf_cpu_model->common_public->set_max_duration =
 787       action_set_max_duration;
 788
 789   surf_network_model->extension_public->communicate = communicate;
 790   surf_network_model->extension_public->get_route = get_route;
 791   surf_network_model->extension_public->get_route_size = get_route_size;
 792   surf_network_model->extension_public->get_link_name = get_link_name;
 793   surf_network_model->extension_public->get_link_bandwidth =
 794       get_link_bandwidth;
 795   surf_network_model->extension_public->get_link_latency =
 796       get_link_latency;
 797
 798   surf_network_model->common_public->get_properties =  get_properties;
 799
 800   link_set = xbt_dict_new();
 801   network_card_set = xbt_dict_new();
 802
 803   if (!network_maxmin_system)
 804     network_maxmin_system = lmm_system_new();
 805 }
 806
 807 void surf_network_model_init_Constant(const char *filename)
 808 {
 809
 810   if (surf_network_model)
 811     return;
 812   surf_network_model_init_internal();
 813   define_callbacks(filename);
 814   xbt_dynar_push(model_list, &surf_network_model);
 815   network_solve = lmm_solve;
 816
 817   update_model_description(surf_network_model_description,
 818                               surf_network_model_description_size,
 819                               "Constant",
 820                               (surf_model_t) surf_network_model);
 821 }