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 #include "xbt/str.h"
  11
  12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  13                                 "Logging specific to the SURF network module");
  14
  15 surf_network_model_t surf_network_model = NULL;
  16 static lmm_system_t network_maxmin_system = NULL;
  17 static void (*network_solve) (lmm_system_t) = NULL;
  18 xbt_dict_t link_set = NULL;
  19
  20 double latency_factor = 1.0;    /* default value */
  21 double bandwidth_factor = 1.0;  /* default value */
  22 double weight_S_parameter = 0.0;        /* default value */
  23
  24 int card_number = 0;
  25 int host_number = 0;
  26 link_CM02_t **routing_table = NULL;
  27 int *routing_table_size = NULL;
  28 static link_CM02_t loopback = NULL;
  29 double sg_tcp_gamma = 0.0;
  30
  31
  32 static void create_routing_table(void)
  33 {
  34   routing_table = xbt_new0(link_CM02_t *,       /*card_number * card_number */
  35                            host_number * host_number);
  36   routing_table_size =
  37     xbt_new0(int, /*card_number * card_number */ host_number * host_number);
  38 }
  39
  40 static void link_free(void *nw_link)
  41 {
  42   free(((link_CM02_t) nw_link)->name);
  43   xbt_dict_free(&(((link_CM02_t) nw_link)->properties));
  44   free(nw_link);
  45 }
  46
  47 static link_CM02_t link_new(char *name,
  48                             double bw_initial,
  49                             tmgr_trace_t bw_trace,
  50                             double lat_initial,
  51                             tmgr_trace_t lat_trace,
  52                             e_surf_link_state_t
  53                             state_initial,
  54                             tmgr_trace_t state_trace,
  55                             e_surf_link_sharing_policy_t
  56                             policy, xbt_dict_t properties)
  57 {
  58   link_CM02_t nw_link = xbt_new0(s_link_CM02_t, 1);
  59   xbt_assert1(!xbt_dict_get_or_null(link_set, name),
  60               "Link '%s' declared several times in the platform file.", name);
  61
  62   nw_link->model = (surf_model_t) surf_network_model;
  63   nw_link->name = name;
  64   nw_link->bw_current = bw_initial;
  65   if (bw_trace)
  66     nw_link->bw_event =
  67       tmgr_history_add_trace(history, bw_trace, 0.0, 0, nw_link);
  68   nw_link->lat_current = lat_initial;
  69   if (lat_trace)
  70     nw_link->lat_event =
  71       tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  72   nw_link->state_current = state_initial;
  73   if (state_trace)
  74     nw_link->state_event =
  75       tmgr_history_add_trace(history, state_trace, 0.0, 0, nw_link);
  76
  77   nw_link->constraint =
  78     lmm_constraint_new(network_maxmin_system, nw_link,
  79                        bandwidth_factor * nw_link->bw_current);
  80
  81   if (policy == SURF_LINK_FATPIPE)
  82     lmm_constraint_shared(nw_link->constraint);
  83
  84   nw_link->properties = properties;
  85
  86   current_property_set = properties;
  87
  88   xbt_dict_set(link_set, name, nw_link, link_free);
  89
  90   return nw_link;
  91 }
  92
  93 static void network_card_free(void *nw_card)
  94 {
  95   free(((network_card_CM02_t) nw_card)->name);
  96   free(nw_card);
  97 }
  98
  99 static int network_card_new(const char *card_name)
 100 {
 101   network_card_CM02_t card =
 102           surf_model_resource_by_name(surf_network_model,card_name);
 103
 104   if (!card) {
 105     card = xbt_new0(s_network_card_CM02_t, 1);
 106     card->name = xbt_strdup(card_name);
 107     card->id = host_number++;
 108     xbt_dict_set(surf_model_resource_set(surf_network_model), card_name, card, network_card_free);
 109   }
 110   return card->id;
 111 }
 112
 113 static void route_new(int src_id, int dst_id,
 114                       link_CM02_t * link_list, int nb_link)
 115 {
 116   ROUTE_SIZE(src_id, dst_id) = nb_link;
 117   ROUTE(src_id, dst_id) = link_list =
 118     xbt_realloc(link_list, sizeof(link_CM02_t) * nb_link);
 119 }
 120
 121 static void parse_link_init(void)
 122 {
 123   char *name_link;
 124   double bw_initial;
 125   tmgr_trace_t bw_trace;
 126   double lat_initial;
 127   tmgr_trace_t lat_trace;
 128   e_surf_link_state_t state_initial_link = SURF_LINK_ON;
 129   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 130   tmgr_trace_t state_trace;
 131
 132   name_link = xbt_strdup(A_surfxml_link_id);
 133   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 134   surf_parse_get_trace(&bw_trace, A_surfxml_link_bandwidth_file);
 135   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 136   surf_parse_get_trace(&lat_trace, A_surfxml_link_latency_file);
 137
 138   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
 139               || (A_surfxml_link_state ==
 140                   A_surfxml_link_state_OFF), "Invalid state");
 141   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 142     state_initial_link = SURF_LINK_ON;
 143   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 144     state_initial_link = SURF_LINK_OFF;
 145
 146   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 147     policy_initial_link = SURF_LINK_SHARED;
 148   else if (A_surfxml_link_sharing_policy ==
 149            A_surfxml_link_sharing_policy_FATPIPE)
 150     policy_initial_link = SURF_LINK_FATPIPE;
 151
 152   surf_parse_get_trace(&state_trace, A_surfxml_link_state_file);
 153
 154   link_new(name_link, bw_initial, bw_trace,
 155            lat_initial, lat_trace, state_initial_link, state_trace,
 156            policy_initial_link, xbt_dict_new());
 157
 158 }
 159
 160 static int src_id = -1;
 161 static int dst_id = -1;
 162
 163 static void parse_route_set_endpoints(void)
 164 {
 165   src_id = network_card_new(A_surfxml_route_src);
 166   dst_id = network_card_new(A_surfxml_route_dst);
 167   route_action = A_surfxml_route_action;
 168 }
 169
 170 static void parse_route_set_route(void)
 171 {
 172   char *name;
 173   if (src_id != -1 && dst_id != -1) {
 174     name = bprintf("%x#%x", src_id, dst_id);
 175     manage_route(route_table, name, route_action, 0);
 176     free(name);
 177   }
 178 }
 179
 180 static void add_loopback(void)
 181 {
 182   int i;
 183   /* Adding loopback if needed */
 184   for (i = 0; i < host_number; i++)
 185     if (!ROUTE_SIZE(i, i)) {
 186       if (!loopback)
 187         loopback = link_new(xbt_strdup("__MSG_loopback__"),
 188                             498000000, NULL, 0.000015, NULL,
 189                             SURF_LINK_ON, NULL, SURF_LINK_FATPIPE, NULL);
 190       ROUTE_SIZE(i, i) = 1;
 191       ROUTE(i, i) = xbt_new0(link_CM02_t, 1);
 192       ROUTE(i, i)[0] = loopback;
 193     }
 194 }
 195
 196 static void add_route(void)
 197 {
 198   xbt_ex_t e;
 199   int nb_link = 0;
 200   unsigned int cpt = 0;
 201   int link_list_capacity = 0;
 202   link_CM02_t *link_list = NULL;
 203   xbt_dict_cursor_t cursor = NULL;
 204   char *key, *data, *end;
 205   const char *sep = "#";
 206   xbt_dynar_t links, keys;
 207
 208   if (routing_table == NULL)
 209     create_routing_table();
 210
 211   xbt_dict_foreach(route_table, cursor, key, data) {
 212     char *link = NULL;
 213     nb_link = 0;
 214     links = (xbt_dynar_t) data;
 215     keys = xbt_str_split_str(key, sep);
 216
 217     link_list_capacity = xbt_dynar_length(links);
 218     link_list = xbt_new(link_CM02_t, link_list_capacity);
 219
 220     src_id = strtol(xbt_dynar_get_as(keys, 0, char *), &end, 16);
 221     dst_id = strtol(xbt_dynar_get_as(keys, 1, char *), &end, 16);
 222     xbt_dynar_free(&keys);
 223
 224     xbt_dynar_foreach(links, cpt, link) {
 225       TRY {
 226         link_list[nb_link++] = xbt_dict_get(link_set, link);
 227       }
 228       CATCH(e) {
 229         RETHROW1("Link %s not found (dict raised this exception: %s)", link);
 230       }
 231     }
 232     route_new(src_id, dst_id, link_list, nb_link);
 233   }
 234 }
 235
 236 static void count_hosts(void)
 237 {
 238   host_number++;
 239 }
 240
 241
 242 static void add_traces(void)
 243 {
 244   xbt_dict_cursor_t cursor = NULL;
 245   char *trace_name, *elm;
 246
 247   static int called = 0;
 248   if (called)
 249     return;
 250   called = 1;
 251
 252   /* connect all traces relative to network */
 253   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 254     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 255     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 256
 257     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 258                 trace_name, elm);
 259     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 260                 trace_name, elm);
 261
 262     link->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 263   }
 264
 265   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 266     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 267     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 268
 269     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 270                 trace_name, elm);
 271     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 272                 trace_name, elm);
 273
 274     link->bw_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 275   }
 276
 277   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 278     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 279     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 280
 281     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 282                 trace_name, elm);
 283     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 284                 trace_name, elm);
 285
 286     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 287   }
 288 }
 289
 290 static void define_callbacks(const char *file)
 291 {
 292   /* Figuring out the network links */
 293   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
 294   surfxml_add_callback(STag_surfxml_link_cb_list, &parse_link_init);
 295   surfxml_add_callback(STag_surfxml_route_cb_list,
 296                        &parse_route_set_endpoints);
 297   surfxml_add_callback(ETag_surfxml_route_cb_list, &parse_route_set_route);
 298   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces);
 299   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_route);
 300   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_loopback);
 301 }
 302
 303 static const char *get_resource_name(void *resource_id)
 304 {
 305   return ((network_card_CM02_t) resource_id)->name;
 306 }
 307
 308 static int resource_used(void *resource_id)
 309 {
 310   return lmm_constraint_used(network_maxmin_system,
 311                              ((link_CM02_t) resource_id)->constraint);
 312 }
 313
 314 static int action_free(surf_action_t action)
 315 {
 316   action->refcount--;
 317   if (!action->refcount) {
 318     xbt_swag_remove(action, action->state_set);
 319     if (((surf_action_network_CM02_t) action)->variable)
 320       lmm_variable_free(network_maxmin_system,
 321                         ((surf_action_network_CM02_t) action)->variable);
 322     free(action);
 323     return 1;
 324   }
 325   return 0;
 326 }
 327
 328 static void action_use(surf_action_t action)
 329 {
 330   action->refcount++;
 331 }
 332
 333 static void action_cancel(surf_action_t action)
 334 {
 335   return;
 336 }
 337
 338 static void action_recycle(surf_action_t action)
 339 {
 340   return;
 341 }
 342
 343 static void action_change_state(surf_action_t action,
 344                                 e_surf_action_state_t state)
 345 {
 346 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 347 /*     if(((surf_action_network_CM02_t)action)->variable) { */
 348 /*       lmm_variable_disable(network_maxmin_system, ((surf_action_network_CM02_t)action)->variable); */
 349 /*       ((surf_action_network_CM02_t)action)->variable = NULL; */
 350 /*     } */
 351
 352   surf_action_change_state(action, state);
 353   return;
 354 }
 355
 356 static double share_resources(double now)
 357 {
 358   s_surf_action_network_CM02_t s_action;
 359   surf_action_network_CM02_t action = NULL;
 360   xbt_swag_t running_actions =
 361     surf_network_model->common_public.states.running_action_set;
 362   double min;
 363
 364   min = generic_maxmin_share_resources(running_actions,
 365                                        xbt_swag_offset(s_action,
 366                                                        variable),
 367                                        network_maxmin_system, network_solve);
 368
 369 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 370
 371   xbt_swag_foreach(action, running_actions) {
 372     if (action->latency > 0) {
 373       if (min < 0)
 374         min = action->latency;
 375       else if (action->latency < min)
 376         min = action->latency;
 377     }
 378   }
 379
 380   return min;
 381 }
 382
 383 static void update_actions_state(double now, double delta)
 384 {
 385   double deltap = 0.0;
 386   surf_action_network_CM02_t action = NULL;
 387   surf_action_network_CM02_t next_action = NULL;
 388   xbt_swag_t running_actions =
 389     surf_network_model->common_public.states.running_action_set;
 390   /*
 391      xbt_swag_t failed_actions =
 392      surf_network_model->common_public.states.failed_action_set;
 393    */
 394
 395   xbt_swag_foreach_safe(action, next_action, running_actions) {
 396     deltap = delta;
 397     if (action->latency > 0) {
 398       if (action->latency > deltap) {
 399         double_update(&(action->latency), deltap);
 400         deltap = 0.0;
 401       } else {
 402         double_update(&(deltap), action->latency);
 403         action->latency = 0.0;
 404       }
 405       if ((action->latency == 0.0) && !(action->suspended))
 406         lmm_update_variable_weight(network_maxmin_system, action->variable,
 407                                    action->weight);
 408     }
 409     double_update(&(action->generic_action.remains),
 410                   lmm_variable_getvalue(action->variable) * deltap);
 411     if (action->generic_action.max_duration != NO_MAX_DURATION)
 412       double_update(&(action->generic_action.max_duration), delta);
 413
 414     if ((action->generic_action.remains <= 0) &&
 415         (lmm_get_variable_weight(action->variable) > 0)) {
 416       action->generic_action.finish = surf_get_clock();
 417       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 418     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 419                (action->generic_action.max_duration <= 0)) {
 420       action->generic_action.finish = surf_get_clock();
 421       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 422     }
 423   }
 424
 425   return;
 426 }
 427
 428 static void update_resource_state(void *id,
 429                                   tmgr_trace_event_t event_type,
 430                                   double value, double date)
 431 {
 432   link_CM02_t nw_link = id;
 433   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 434   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 435   /*     value, event_type); */
 436
 437   if (event_type == nw_link->bw_event) {
 438     double delta =
 439       weight_S_parameter / value - weight_S_parameter / nw_link->bw_current;
 440     lmm_variable_t var = NULL;
 441     lmm_element_t elem = NULL;
 442     surf_action_network_CM02_t action = NULL;
 443
 444     nw_link->bw_current = value;
 445     lmm_update_constraint_bound(network_maxmin_system, nw_link->constraint,
 446                                 bandwidth_factor * nw_link->bw_current);
 447     if (weight_S_parameter > 0) {
 448       while ((var = lmm_get_var_from_cnst
 449               (network_maxmin_system, nw_link->constraint, &elem))) {
 450         action = lmm_variable_id(var);
 451         action->weight += delta;
 452         if (!(action->suspended))
 453           lmm_update_variable_weight(network_maxmin_system, action->variable,
 454                                      action->weight);
 455       }
 456     }
 457   } else if (event_type == nw_link->lat_event) {
 458     double delta = value - nw_link->lat_current;
 459     lmm_variable_t var = NULL;
 460     lmm_element_t elem = NULL;
 461     surf_action_network_CM02_t action = NULL;
 462
 463     nw_link->lat_current = value;
 464     while ((var = lmm_get_var_from_cnst
 465             (network_maxmin_system, nw_link->constraint, &elem))) {
 466       action = lmm_variable_id(var);
 467       action->lat_current += delta;
 468       action->weight += delta;
 469       if (action->rate < 0)
 470         lmm_update_variable_bound(network_maxmin_system, action->variable,
 471                                   sg_tcp_gamma / (2.0 * action->lat_current));
 472       else
 473         lmm_update_variable_bound(network_maxmin_system, action->variable,
 474                                   min(action->rate,
 475                                       sg_tcp_gamma / (2.0 * action->lat_current)));
 476       if (!(action->suspended))
 477         lmm_update_variable_weight(network_maxmin_system, action->variable,
 478                                    action->weight);
 479
 480     }
 481   } else if (event_type == nw_link->state_event) {
 482     if (value > 0)
 483       nw_link->state_current = SURF_LINK_ON;
 484     else {
 485       lmm_constraint_t cnst = nw_link->constraint;
 486       lmm_variable_t var = NULL;
 487       lmm_element_t elem = NULL;
 488
 489       nw_link->state_current = SURF_LINK_OFF;
 490       while ((var = lmm_get_var_from_cnst
 491               (network_maxmin_system, cnst, &elem))) {
 492         surf_action_t action = lmm_variable_id(var);
 493
 494         if (surf_action_get_state(action) == SURF_ACTION_RUNNING ||
 495             surf_action_get_state(action) == SURF_ACTION_READY) {
 496           action->finish = date;
 497           action_change_state(action, SURF_ACTION_FAILED);
 498         }
 499       }
 500     }
 501   } else {
 502     CRITICAL0("Unknown event ! \n");
 503     xbt_abort();
 504   }
 505
 506   return;
 507 }
 508
 509 static surf_action_t communicate(void *src, void *dst, double size,
 510                                  double rate)
 511 {
 512   surf_action_network_CM02_t action = NULL;
 513   /* LARGE PLATFORMS HACK:
 514      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 515      Use the cluster_id for ->id */
 516   network_card_CM02_t card_src = src;
 517   network_card_CM02_t card_dst = dst;
 518   int route_size = ROUTE_SIZE(card_src->id, card_dst->id);
 519   link_CM02_t *route = ROUTE(card_src->id, card_dst->id);
 520   /* LARGE PLATFORMS HACK:
 521      total_route_size = route_size + src->link_nb + dst->nb */
 522   int i;
 523
 524   XBT_IN4("(%s,%s,%g,%g)", card_src->name, card_dst->name, size, rate);
 525   /* LARGE PLATFORMS HACK:
 526      assert on total_route_size */
 527   xbt_assert2(route_size,
 528               "You're trying to send data from %s to %s but there is no connexion between these two cards.",
 529               card_src->name, card_dst->name);
 530
 531   action = xbt_new0(s_surf_action_network_CM02_t, 1);
 532
 533   action->generic_action.refcount = 1;
 534   action->generic_action.cost = size;
 535   action->generic_action.remains = size;
 536   action->generic_action.max_duration = NO_MAX_DURATION;
 537   action->generic_action.start = surf_get_clock();
 538   action->generic_action.finish = -1.0;
 539   action->generic_action.model_type = (surf_model_t) surf_network_model;
 540   action->suspended = 0;        /* Should be useless because of the
 541                                    calloc but it seems to help valgrind... */
 542   action->generic_action.state_set =
 543     surf_network_model->common_public.states.running_action_set;
 544   for (i = 0; i < route_size; i++)
 545     if (route[i]->state_current == SURF_LINK_OFF) {
 546       action->generic_action.state_set =
 547         surf_network_model->common_public.states.failed_action_set;
 548       break;
 549     }
 550
 551   xbt_swag_insert(action, action->generic_action.state_set);
 552   action->rate = rate;
 553
 554   action->latency = 0.0;
 555   action->weight = 0.0;
 556   for (i = 0; i < route_size; i++) {
 557     action->latency += route[i]->lat_current;
 558     action->weight +=
 559       route[i]->lat_current + weight_S_parameter / route[i]->bw_current;
 560   }
 561   /* LARGE PLATFORMS HACK:
 562      Add src->link and dst->link latencies */
 563   action->lat_current = action->latency;
 564   action->latency *= latency_factor;
 565
 566   /* LARGE PLATFORMS HACK:
 567      lmm_variable_new(..., total_route_size) */
 568   if (action->latency > 0)
 569     action->variable =
 570       lmm_variable_new(network_maxmin_system, action, 0.0, -1.0, route_size);
 571   else
 572     action->variable =
 573       lmm_variable_new(network_maxmin_system, action, 1.0, -1.0, route_size);
 574
 575   if (action->rate < 0) {
 576     if (action->lat_current > 0)
 577       lmm_update_variable_bound(network_maxmin_system, action->variable,
 578                                 sg_tcp_gamma / (2.0 * action->lat_current));
 579     else
 580       lmm_update_variable_bound(network_maxmin_system, action->variable,
 581                                 -1.0);
 582   } else {
 583     if (action->lat_current > 0)
 584       lmm_update_variable_bound(network_maxmin_system, action->variable,
 585                                 min(action->rate,
 586                                     sg_tcp_gamma / (2.0 * action->lat_current)));
 587     else
 588       lmm_update_variable_bound(network_maxmin_system, action->variable,
 589                                 action->rate);
 590   }
 591
 592   for (i = 0; i < route_size; i++)
 593     lmm_expand(network_maxmin_system, route[i]->constraint,
 594                action->variable, 1.0);
 595   /* LARGE PLATFORMS HACK:
 596      expand also with src->link and dst->link */
 597
 598   XBT_OUT;
 599
 600   return (surf_action_t) action;
 601 }
 602
 603 /* returns an array of link_CM02_t */
 604 static const void **get_route(void *src, void *dst)
 605 {
 606   network_card_CM02_t card_src = src;
 607   network_card_CM02_t card_dst = dst;
 608   return (const void **) ROUTE(card_src->id, card_dst->id);
 609 }
 610
 611 static int get_route_size(void *src, void *dst)
 612 {
 613   network_card_CM02_t card_src = src;
 614   network_card_CM02_t card_dst = dst;
 615   return ROUTE_SIZE(card_src->id, card_dst->id);
 616 }
 617
 618 static const char *get_link_name(const void *link)
 619 {
 620   return ((link_CM02_t) link)->name;
 621 }
 622
 623 static double get_link_bandwidth(const void *link)
 624 {
 625   return ((link_CM02_t) link)->bw_current;
 626 }
 627
 628 static double get_link_latency(const void *link)
 629 {
 630   return ((link_CM02_t) link)->lat_current;
 631 }
 632
 633 static int link_shared(const void *link)
 634 {
 635   return lmm_constraint_is_shared(((link_CM02_t) link)->constraint);
 636 }
 637
 638 static xbt_dict_t get_properties(void *link)
 639 {
 640   return ((link_CM02_t) link)->properties;
 641 }
 642
 643 static void action_suspend(surf_action_t action)
 644 {
 645   ((surf_action_network_CM02_t) action)->suspended = 1;
 646   lmm_update_variable_weight(network_maxmin_system,
 647                              ((surf_action_network_CM02_t) action)->variable,
 648                              0.0);
 649 }
 650
 651 static void action_resume(surf_action_t action)
 652 {
 653   if (((surf_action_network_CM02_t) action)->suspended) {
 654     lmm_update_variable_weight(network_maxmin_system,
 655                                ((surf_action_network_CM02_t)
 656                                 action)->variable,
 657                                ((surf_action_network_CM02_t) action)->weight);
 658     ((surf_action_network_CM02_t) action)->suspended = 0;
 659   }
 660 }
 661
 662 static int action_is_suspended(surf_action_t action)
 663 {
 664   return ((surf_action_network_CM02_t) action)->suspended;
 665 }
 666
 667 static void action_set_max_duration(surf_action_t action, double duration)
 668 {
 669   action->max_duration = duration;
 670 }
 671
 672 static void finalize(void)
 673 {
 674   int i, j;
 675
 676   xbt_dict_free(&link_set);
 677
 678   surf_model_exit((surf_model_t)surf_network_model);
 679
 680   free(surf_network_model->extension_public);
 681   free(surf_network_model);
 682   surf_network_model = NULL;
 683
 684   loopback = NULL;
 685   for (i = 0; i < host_number; i++)
 686     for (j = 0; j < host_number; j++)
 687       free(ROUTE(i, j));
 688   free(routing_table);
 689   routing_table = NULL;
 690   free(routing_table_size);
 691   routing_table_size = NULL;
 692   host_number = 0;
 693   lmm_system_free(network_maxmin_system);
 694   network_maxmin_system = NULL;
 695 }
 696
 697 static void surf_network_model_init_internal(void)
 698 {
 699   surf_network_model = xbt_new0(s_surf_network_model_t, 1);
 700
 701   surf_model_init((surf_model_t)surf_network_model);
 702
 703   surf_network_model->extension_public =
 704     xbt_new0(s_surf_network_model_extension_public_t, 1);
 705
 706   surf_network_model->common_public.get_resource_name = get_resource_name;
 707   surf_network_model->common_public.action_get_state = surf_action_get_state;
 708   surf_network_model->common_public.action_get_start_time =
 709     surf_action_get_start_time;
 710   surf_network_model->common_public.action_get_finish_time =
 711     surf_action_get_finish_time;
 712   surf_network_model->common_public.action_free = action_free;
 713   surf_network_model->common_public.action_use = action_use;
 714   surf_network_model->common_public.action_cancel = action_cancel;
 715   surf_network_model->common_public.action_recycle = action_recycle;
 716   surf_network_model->common_public.action_change_state =
 717     action_change_state;
 718   surf_network_model->common_public.action_set_data = surf_action_set_data;
 719   surf_network_model->common_public.name = "network";
 720
 721   surf_network_model->common_private->resource_used = resource_used;
 722   surf_network_model->common_private->share_resources = share_resources;
 723   surf_network_model->common_private->update_actions_state =
 724     update_actions_state;
 725   surf_network_model->common_private->update_resource_state =
 726     update_resource_state;
 727   surf_network_model->common_private->finalize = finalize;
 728
 729   surf_network_model->common_public.suspend = action_suspend;
 730   surf_network_model->common_public.resume = action_resume;
 731   surf_network_model->common_public.is_suspended = action_is_suspended;
 732   surf_cpu_model->common_public.set_max_duration = action_set_max_duration;
 733
 734   surf_network_model->extension_public->communicate = communicate;
 735   surf_network_model->extension_public->get_route = get_route;
 736   surf_network_model->extension_public->get_route_size = get_route_size;
 737   surf_network_model->extension_public->get_link_name = get_link_name;
 738   surf_network_model->extension_public->get_link_bandwidth =
 739     get_link_bandwidth;
 740   surf_network_model->extension_public->get_link_latency = get_link_latency;
 741   surf_network_model->extension_public->link_shared = link_shared;
 742
 743   surf_network_model->common_public.get_properties = get_properties;
 744
 745   link_set = xbt_dict_new();
 746
 747   if (!network_maxmin_system)
 748     network_maxmin_system = lmm_system_new();
 749 }
 750
 751 /************************************************************************/
 752 /* New model based on optimizations discussed during this thesis        */
 753 /************************************************************************/
 754 void surf_network_model_init_LegrandVelho(const char *filename)
 755 {
 756
 757   if (surf_network_model)
 758     return;
 759   surf_network_model_init_internal();
 760   define_callbacks(filename);
 761   xbt_dynar_push(model_list, &surf_network_model);
 762   network_solve = lmm_solve;
 763
 764   latency_factor = 10.4;
 765   bandwidth_factor = 0.92;
 766   weight_S_parameter = 8775;
 767
 768   update_model_description(surf_network_model_description,
 769                            "LegrandVelho", (surf_model_t) surf_network_model);
 770 }
 771
 772 /***************************************************************************/
 773 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 774 /***************************************************************************/
 775 /* @TechReport{      rr-lip2002-40, */
 776 /*   author        = {Henri Casanova and Loris Marchal}, */
 777 /*   institution   = {LIP}, */
 778 /*   title         = {A Network Model for Simulation of Grid Application}, */
 779 /*   number        = {2002-40}, */
 780 /*   month         = {oct}, */
 781 /*   year          = {2002} */
 782 /* } */
 783 void surf_network_model_init_CM02(const char *filename)
 784 {
 785
 786   if (surf_network_model)
 787     return;
 788   surf_network_model_init_internal();
 789   define_callbacks(filename);
 790   xbt_dynar_push(model_list, &surf_network_model);
 791   network_solve = lmm_solve;
 792
 793   update_model_description(surf_network_model_description,
 794                            "CM02", (surf_model_t) surf_network_model);
 795 }
 796
 797 void surf_network_model_init_Reno(const char *filename)
 798 {
 799   if (surf_network_model)
 800     return;
 801   surf_network_model_init_internal();
 802   define_callbacks(filename);
 803
 804   xbt_dynar_push(model_list, &surf_network_model);
 805   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 806   network_solve = lagrange_solve;
 807
 808   latency_factor = 10.4;
 809   bandwidth_factor = 0.92;
 810   weight_S_parameter = 8775;
 811
 812   update_model_description(surf_network_model_description,
 813                            "Reno", (surf_model_t) surf_network_model);
 814 }
 815
 816
 817 void surf_network_model_init_Reno2(const char *filename)
 818 {
 819   if (surf_network_model)
 820     return;
 821   surf_network_model_init_internal();
 822   define_callbacks(filename);
 823
 824   xbt_dynar_push(model_list, &surf_network_model);
 825   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 826                                     func_reno2_fpi);
 827   network_solve = lagrange_solve;
 828
 829   latency_factor = 10.4;
 830   bandwidth_factor = 0.92;
 831   weight_S_parameter = 8775;
 832
 833   update_model_description(surf_network_model_description,
 834                            "Reno2", (surf_model_t) surf_network_model);
 835 }
 836
 837 void surf_network_model_init_Vegas(const char *filename)
 838 {
 839   if (surf_network_model)
 840     return;
 841   surf_network_model_init_internal();
 842   define_callbacks(filename);
 843
 844   xbt_dynar_push(model_list, &surf_network_model);
 845   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 846                                     func_vegas_fpi);
 847   network_solve = lagrange_solve;
 848
 849   latency_factor = 10.4;
 850   bandwidth_factor = 0.92;
 851   weight_S_parameter = 8775;
 852
 853   update_model_description(surf_network_model_description,
 854                            "Vegas", (surf_model_t) surf_network_model);
 855 }
 856
 857 #ifdef HAVE_SDP
 858 void surf_network_model_init_SDP(const char *filename)
 859 {
 860   if (surf_network_model)
 861     return;
 862   surf_network_model_init_internal();
 863   define_callbacks(filename);
 864
 865   xbt_dynar_push(model_list, &surf_network_model);
 866   network_solve = sdp_solve;
 867
 868   update_model_description(surf_network_model_description,
 869                            "SDP", (surf_model_t) surf_network_model);
 870 }
 871 #endif