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_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_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,
 109                  network_card_free);
 110   }
 111   return card->id;
 112 }
 113
 114 static void route_new(int src_id, int dst_id,
 115                       link_CM02_t * link_list, int nb_link)
 116 {
 117   ROUTE_SIZE(src_id, dst_id) = nb_link;
 118   ROUTE(src_id, dst_id) = link_list =
 119     xbt_realloc(link_list, sizeof(link_CM02_t) * nb_link);
 120 }
 121
 122 static void parse_link_init(void)
 123 {
 124   char *name_link;
 125   double bw_initial;
 126   tmgr_trace_t bw_trace;
 127   double lat_initial;
 128   tmgr_trace_t lat_trace;
 129   e_surf_link_state_t state_initial_link = SURF_LINK_ON;
 130   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
 131   tmgr_trace_t state_trace;
 132
 133   name_link = xbt_strdup(A_surfxml_link_id);
 134   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
 135   surf_parse_get_trace(&bw_trace, A_surfxml_link_bandwidth_file);
 136   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
 137   surf_parse_get_trace(&lat_trace, A_surfxml_link_latency_file);
 138
 139   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
 140               || (A_surfxml_link_state ==
 141                   A_surfxml_link_state_OFF), "Invalid state");
 142   if (A_surfxml_link_state == A_surfxml_link_state_ON)
 143     state_initial_link = SURF_LINK_ON;
 144   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
 145     state_initial_link = SURF_LINK_OFF;
 146
 147   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
 148     policy_initial_link = SURF_LINK_SHARED;
 149   else if (A_surfxml_link_sharing_policy ==
 150            A_surfxml_link_sharing_policy_FATPIPE)
 151     policy_initial_link = SURF_LINK_FATPIPE;
 152
 153   surf_parse_get_trace(&state_trace, A_surfxml_link_state_file);
 154
 155   link_new(name_link, bw_initial, bw_trace,
 156            lat_initial, lat_trace, state_initial_link, state_trace,
 157            policy_initial_link, xbt_dict_new());
 158
 159 }
 160
 161 static int src_id = -1;
 162 static int dst_id = -1;
 163
 164 static void parse_route_set_endpoints(void)
 165 {
 166   src_id = network_card_new(A_surfxml_route_src);
 167   dst_id = network_card_new(A_surfxml_route_dst);
 168   route_action = A_surfxml_route_action;
 169 }
 170
 171 static void parse_route_set_route(void)
 172 {
 173   char *name;
 174   if (src_id != -1 && dst_id != -1) {
 175     name = bprintf("%x#%x", src_id, dst_id);
 176     manage_route(route_table, name, route_action, 0);
 177     free(name);
 178   }
 179 }
 180
 181 static void add_loopback(void)
 182 {
 183   int i;
 184   /* Adding loopback if needed */
 185   for (i = 0; i < host_number; i++)
 186     if (!ROUTE_SIZE(i, i)) {
 187       if (!loopback)
 188         loopback = link_new(xbt_strdup("__MSG_loopback__"),
 189                             498000000, NULL, 0.000015, NULL,
 190                             SURF_LINK_ON, NULL, SURF_LINK_FATPIPE, NULL);
 191       ROUTE_SIZE(i, i) = 1;
 192       ROUTE(i, i) = xbt_new0(link_CM02_t, 1);
 193       ROUTE(i, i)[0] = loopback;
 194     }
 195 }
 196
 197 static void add_route(void)
 198 {
 199   xbt_ex_t e;
 200   int nb_link = 0;
 201   unsigned int cpt = 0;
 202   int link_list_capacity = 0;
 203   link_CM02_t *link_list = NULL;
 204   xbt_dict_cursor_t cursor = NULL;
 205   char *key, *data, *end;
 206   const char *sep = "#";
 207   xbt_dynar_t links, keys;
 208
 209   if (routing_table == NULL)
 210     create_routing_table();
 211
 212   xbt_dict_foreach(route_table, cursor, key, data) {
 213     char *link = NULL;
 214     nb_link = 0;
 215     links = (xbt_dynar_t) data;
 216     keys = xbt_str_split_str(key, sep);
 217
 218     link_list_capacity = xbt_dynar_length(links);
 219     link_list = xbt_new(link_CM02_t, link_list_capacity);
 220
 221     src_id = strtol(xbt_dynar_get_as(keys, 0, char *), &end, 16);
 222     dst_id = strtol(xbt_dynar_get_as(keys, 1, char *), &end, 16);
 223     xbt_dynar_free(&keys);
 224
 225     xbt_dynar_foreach(links, cpt, link) {
 226       TRY {
 227         link_list[nb_link++] = xbt_dict_get(link_set, link);
 228       }
 229       CATCH(e) {
 230         RETHROW1("Link %s not found (dict raised this exception: %s)", link);
 231       }
 232     }
 233     route_new(src_id, dst_id, link_list, nb_link);
 234   }
 235 }
 236
 237 static void count_hosts(void)
 238 {
 239   host_number++;
 240 }
 241
 242
 243 static void add_traces(void)
 244 {
 245   xbt_dict_cursor_t cursor = NULL;
 246   char *trace_name, *elm;
 247
 248   static int called = 0;
 249   if (called)
 250     return;
 251   called = 1;
 252
 253   /* connect all traces relative to network */
 254   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 255     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 256     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 257
 258     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 259                 trace_name, elm);
 260     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 261                 trace_name, elm);
 262
 263     link->state_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 264   }
 265
 266   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 267     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 268     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 269
 270     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 271                 trace_name, elm);
 272     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 273                 trace_name, elm);
 274
 275     link->bw_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 276   }
 277
 278   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 279     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 280     link_CM02_t link = xbt_dict_get_or_null(link_set, elm);
 281
 282     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 283                 trace_name, elm);
 284     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 285                 trace_name, elm);
 286
 287     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 288   }
 289 }
 290
 291 static void define_callbacks(const char *file)
 292 {
 293   /* Figuring out the network links */
 294   surfxml_add_callback(STag_surfxml_host_cb_list, &count_hosts);
 295   surfxml_add_callback(STag_surfxml_link_cb_list, &parse_link_init);
 296   surfxml_add_callback(STag_surfxml_route_cb_list,
 297                        &parse_route_set_endpoints);
 298   surfxml_add_callback(ETag_surfxml_route_cb_list, &parse_route_set_route);
 299   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_traces);
 300   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_route);
 301   surfxml_add_callback(ETag_surfxml_platform_cb_list, &add_loopback);
 302 }
 303
 304 static const char *get_resource_name(void *resource_id)
 305 {
 306   return ((network_card_CM02_t) resource_id)->name;
 307 }
 308
 309 static int resource_used(void *resource_id)
 310 {
 311   return lmm_constraint_used(network_maxmin_system,
 312                              ((link_CM02_t) resource_id)->constraint);
 313 }
 314
 315 static int action_free(surf_action_t action)
 316 {
 317   action->refcount--;
 318   if (!action->refcount) {
 319     xbt_swag_remove(action, action->state_set);
 320     if (((surf_action_network_CM02_t) action)->variable)
 321       lmm_variable_free(network_maxmin_system,
 322                         ((surf_action_network_CM02_t) action)->variable);
 323     free(action);
 324     return 1;
 325   }
 326   return 0;
 327 }
 328
 329 static void action_use(surf_action_t action)
 330 {
 331   action->refcount++;
 332 }
 333
 334 static void action_cancel(surf_action_t action)
 335 {
 336   return;
 337 }
 338
 339 static void action_recycle(surf_action_t action)
 340 {
 341   return;
 342 }
 343
 344 static void action_change_state(surf_action_t action,
 345                                 e_surf_action_state_t state)
 346 {
 347 /*   if((state==SURF_ACTION_DONE) || (state==SURF_ACTION_FAILED)) */
 348 /*     if(((surf_action_network_CM02_t)action)->variable) { */
 349 /*       lmm_variable_disable(network_maxmin_system, ((surf_action_network_CM02_t)action)->variable); */
 350 /*       ((surf_action_network_CM02_t)action)->variable = NULL; */
 351 /*     } */
 352
 353   surf_action_change_state(action, state);
 354   return;
 355 }
 356
 357 static double share_resources(double now)
 358 {
 359   s_surf_action_network_CM02_t s_action;
 360   surf_action_network_CM02_t action = NULL;
 361   xbt_swag_t running_actions = surf_network_model->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 = surf_network_model->states.running_action_set;
 389   /*
 390      xbt_swag_t failed_actions =
 391      surf_network_model->states.failed_action_set;
 392    */
 393
 394   xbt_swag_foreach_safe(action, next_action, running_actions) {
 395     deltap = delta;
 396     if (action->latency > 0) {
 397       if (action->latency > deltap) {
 398         double_update(&(action->latency), deltap);
 399         deltap = 0.0;
 400       } else {
 401         double_update(&(deltap), action->latency);
 402         action->latency = 0.0;
 403       }
 404       if ((action->latency == 0.0) && !(action->suspended))
 405         lmm_update_variable_weight(network_maxmin_system, action->variable,
 406                                    action->weight);
 407     }
 408     double_update(&(action->generic_action.remains),
 409                   lmm_variable_getvalue(action->variable) * deltap);
 410     if (action->generic_action.max_duration != NO_MAX_DURATION)
 411       double_update(&(action->generic_action.max_duration), delta);
 412
 413     if ((action->generic_action.remains <= 0) &&
 414         (lmm_get_variable_weight(action->variable) > 0)) {
 415       action->generic_action.finish = surf_get_clock();
 416       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 417     } else if ((action->generic_action.max_duration != NO_MAX_DURATION) &&
 418                (action->generic_action.max_duration <= 0)) {
 419       action->generic_action.finish = surf_get_clock();
 420       action_change_state((surf_action_t) action, SURF_ACTION_DONE);
 421     }
 422   }
 423
 424   return;
 425 }
 426
 427 static void update_resource_state(void *id,
 428                                   tmgr_trace_event_t event_type,
 429                                   double value, double date)
 430 {
 431   link_CM02_t nw_link = id;
 432   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 433   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 434   /*     value, event_type); */
 435
 436   if (event_type == nw_link->bw_event) {
 437     double delta =
 438       weight_S_parameter / value - weight_S_parameter / nw_link->bw_current;
 439     lmm_variable_t var = NULL;
 440     lmm_element_t elem = NULL;
 441     surf_action_network_CM02_t action = NULL;
 442
 443     nw_link->bw_current = value;
 444     lmm_update_constraint_bound(network_maxmin_system, nw_link->constraint,
 445                                 bandwidth_factor * nw_link->bw_current);
 446     if (weight_S_parameter > 0) {
 447       while ((var = lmm_get_var_from_cnst
 448               (network_maxmin_system, nw_link->constraint, &elem))) {
 449         action = lmm_variable_id(var);
 450         action->weight += delta;
 451         if (!(action->suspended))
 452           lmm_update_variable_weight(network_maxmin_system, action->variable,
 453                                      action->weight);
 454       }
 455     }
 456   } else if (event_type == nw_link->lat_event) {
 457     double delta = value - nw_link->lat_current;
 458     lmm_variable_t var = NULL;
 459     lmm_element_t elem = NULL;
 460     surf_action_network_CM02_t action = NULL;
 461
 462     nw_link->lat_current = value;
 463     while ((var = lmm_get_var_from_cnst
 464             (network_maxmin_system, nw_link->constraint, &elem))) {
 465       action = lmm_variable_id(var);
 466       action->lat_current += delta;
 467       action->weight += delta;
 468       if (action->rate < 0)
 469         lmm_update_variable_bound(network_maxmin_system, action->variable,
 470                                   sg_tcp_gamma / (2.0 * action->lat_current));
 471       else
 472         lmm_update_variable_bound(network_maxmin_system, action->variable,
 473                                   min(action->rate,
 474                                       sg_tcp_gamma / (2.0 *
 475                                                       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_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->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->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 *
 587                                                     action->lat_current)));
 588     else
 589       lmm_update_variable_bound(network_maxmin_system, action->variable,
 590                                 action->rate);
 591   }
 592
 593   for (i = 0; i < route_size; i++)
 594     lmm_expand(network_maxmin_system, route[i]->constraint,
 595                action->variable, 1.0);
 596   /* LARGE PLATFORMS HACK:
 597      expand also with src->link and dst->link */
 598
 599   XBT_OUT;
 600
 601   return (surf_action_t) action;
 602 }
 603
 604 /* returns an array of link_CM02_t */
 605 static const void **get_route(void *src, void *dst)
 606 {
 607   network_card_CM02_t card_src = src;
 608   network_card_CM02_t card_dst = dst;
 609   return (const void **) ROUTE(card_src->id, card_dst->id);
 610 }
 611
 612 static int get_route_size(void *src, void *dst)
 613 {
 614   network_card_CM02_t card_src = src;
 615   network_card_CM02_t card_dst = dst;
 616   return ROUTE_SIZE(card_src->id, card_dst->id);
 617 }
 618
 619 static const char *get_link_name(const void *link)
 620 {
 621   return ((link_CM02_t) link)->name;
 622 }
 623
 624 static double get_link_bandwidth(const void *link)
 625 {
 626   return ((link_CM02_t) link)->bw_current;
 627 }
 628
 629 static double get_link_latency(const void *link)
 630 {
 631   return ((link_CM02_t) link)->lat_current;
 632 }
 633
 634 static int link_shared(const void *link)
 635 {
 636   return lmm_constraint_is_shared(((link_CM02_t) link)->constraint);
 637 }
 638
 639 static xbt_dict_t get_properties(void *link)
 640 {
 641   return ((link_CM02_t) link)->properties;
 642 }
 643
 644 static void action_suspend(surf_action_t action)
 645 {
 646   ((surf_action_network_CM02_t) action)->suspended = 1;
 647   lmm_update_variable_weight(network_maxmin_system,
 648                              ((surf_action_network_CM02_t) action)->variable,
 649                              0.0);
 650 }
 651
 652 static void action_resume(surf_action_t action)
 653 {
 654   if (((surf_action_network_CM02_t) action)->suspended) {
 655     lmm_update_variable_weight(network_maxmin_system,
 656                                ((surf_action_network_CM02_t)
 657                                 action)->variable,
 658                                ((surf_action_network_CM02_t) action)->weight);
 659     ((surf_action_network_CM02_t) action)->suspended = 0;
 660   }
 661 }
 662
 663 static int action_is_suspended(surf_action_t action)
 664 {
 665   return ((surf_action_network_CM02_t) action)->suspended;
 666 }
 667
 668 static void action_set_max_duration(surf_action_t action, double duration)
 669 {
 670   action->max_duration = duration;
 671 }
 672
 673 static void finalize(void)
 674 {
 675   int i, j;
 676
 677   xbt_dict_free(&link_set);
 678
 679   surf_model_exit(surf_network_model);
 680
 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_model_t, 1);
 700
 701   surf_model_init(surf_network_model);
 702
 703   surf_network_model->get_resource_name = get_resource_name;
 704   surf_network_model->action_get_state = surf_action_get_state;
 705   surf_network_model->action_get_start_time = surf_action_get_start_time;
 706   surf_network_model->action_get_finish_time = surf_action_get_finish_time;
 707   surf_network_model->action_free = action_free;
 708   surf_network_model->action_use = action_use;
 709   surf_network_model->action_cancel = action_cancel;
 710   surf_network_model->action_recycle = action_recycle;
 711   surf_network_model->action_change_state = action_change_state;
 712   surf_network_model->action_set_data = surf_action_set_data;
 713   surf_network_model->name = "network";
 714
 715   surf_network_model->model_private->resource_used = resource_used;
 716   surf_network_model->model_private->share_resources = share_resources;
 717   surf_network_model->model_private->update_actions_state =
 718     update_actions_state;
 719   surf_network_model->model_private->update_resource_state =
 720     update_resource_state;
 721   surf_network_model->model_private->finalize = finalize;
 722
 723   surf_network_model->suspend = action_suspend;
 724   surf_network_model->resume = action_resume;
 725   surf_network_model->is_suspended = action_is_suspended;
 726   surf_cpu_model->set_max_duration = action_set_max_duration;
 727
 728   surf_network_model->extension.network.communicate = communicate;
 729   surf_network_model->extension.network.get_route = get_route;
 730   surf_network_model->extension.network.get_route_size = get_route_size;
 731   surf_network_model->extension.network.get_link_name = get_link_name;
 732   surf_network_model->extension.network.get_link_bandwidth =
 733     get_link_bandwidth;
 734   surf_network_model->extension.network.get_link_latency = get_link_latency;
 735   surf_network_model->extension.network.link_shared = link_shared;
 736
 737   surf_network_model->get_properties = get_properties;
 738
 739   link_set = xbt_dict_new();
 740
 741   if (!network_maxmin_system)
 742     network_maxmin_system = lmm_system_new();
 743 }
 744
 745 /************************************************************************/
 746 /* New model based on optimizations discussed during this thesis        */
 747 /************************************************************************/
 748 void surf_network_model_init_LegrandVelho(const char *filename)
 749 {
 750
 751   if (surf_network_model)
 752     return;
 753   surf_network_model_init_internal();
 754   define_callbacks(filename);
 755   xbt_dynar_push(model_list, &surf_network_model);
 756   network_solve = lmm_solve;
 757
 758   latency_factor = 10.4;
 759   bandwidth_factor = 0.92;
 760   weight_S_parameter = 8775;
 761
 762   update_model_description(surf_network_model_description,
 763                            "LegrandVelho", surf_network_model);
 764 }
 765
 766 /***************************************************************************/
 767 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 768 /***************************************************************************/
 769 /* @TechReport{      rr-lip2002-40, */
 770 /*   author        = {Henri Casanova and Loris Marchal}, */
 771 /*   institution   = {LIP}, */
 772 /*   title         = {A Network Model for Simulation of Grid Application}, */
 773 /*   number        = {2002-40}, */
 774 /*   month         = {oct}, */
 775 /*   year          = {2002} */
 776 /* } */
 777 void surf_network_model_init_CM02(const char *filename)
 778 {
 779
 780   if (surf_network_model)
 781     return;
 782   surf_network_model_init_internal();
 783   define_callbacks(filename);
 784   xbt_dynar_push(model_list, &surf_network_model);
 785   network_solve = lmm_solve;
 786
 787   update_model_description(surf_network_model_description,
 788                            "CM02", surf_network_model);
 789 }
 790
 791 void surf_network_model_init_Reno(const char *filename)
 792 {
 793   if (surf_network_model)
 794     return;
 795   surf_network_model_init_internal();
 796   define_callbacks(filename);
 797
 798   xbt_dynar_push(model_list, &surf_network_model);
 799   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 800   network_solve = lagrange_solve;
 801
 802   latency_factor = 10.4;
 803   bandwidth_factor = 0.92;
 804   weight_S_parameter = 8775;
 805
 806   update_model_description(surf_network_model_description,
 807                            "Reno", surf_network_model);
 808 }
 809
 810
 811 void surf_network_model_init_Reno2(const char *filename)
 812 {
 813   if (surf_network_model)
 814     return;
 815   surf_network_model_init_internal();
 816   define_callbacks(filename);
 817
 818   xbt_dynar_push(model_list, &surf_network_model);
 819   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 820                                     func_reno2_fpi);
 821   network_solve = lagrange_solve;
 822
 823   latency_factor = 10.4;
 824   bandwidth_factor = 0.92;
 825   weight_S_parameter = 8775;
 826
 827   update_model_description(surf_network_model_description,
 828                            "Reno2", surf_network_model);
 829 }
 830
 831 void surf_network_model_init_Vegas(const char *filename)
 832 {
 833   if (surf_network_model)
 834     return;
 835   surf_network_model_init_internal();
 836   define_callbacks(filename);
 837
 838   xbt_dynar_push(model_list, &surf_network_model);
 839   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 840                                     func_vegas_fpi);
 841   network_solve = lagrange_solve;
 842
 843   latency_factor = 10.4;
 844   bandwidth_factor = 0.92;
 845   weight_S_parameter = 8775;
 846
 847   update_model_description(surf_network_model_description,
 848                            "Vegas", surf_network_model);
 849 }
 850
 851 #ifdef HAVE_SDP
 852 void surf_network_model_init_SDP(const char *filename)
 853 {
 854   if (surf_network_model)
 855     return;
 856   surf_network_model_init_internal();
 857   define_callbacks(filename);
 858
 859   xbt_dynar_push(model_list, &surf_network_model);
 860   network_solve = sdp_solve;
 861
 862   update_model_description(surf_network_model_description,
 863                            "SDP", surf_network_model);
 864 }
 865 #endif