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
  19 double sg_latency_factor = 1.0;    /* default value; can be set by model or from command line */
  20 double sg_bandwidth_factor = 1.0;  /* default value; can be set by model or from command line */
  21 double sg_weight_S_parameter = 0.0;/* default value; can be set by model or from command line */
  22
  23 double sg_tcp_gamma = 0.0;
  24
  25
  26 static link_CM02_t net_link_new(char *name,
  27                             double bw_initial,
  28                             tmgr_trace_t bw_trace,
  29                             double lat_initial,
  30                             tmgr_trace_t lat_trace,
  31                             e_surf_resource_state_t
  32                             state_initial,
  33                             tmgr_trace_t state_trace,
  34                             e_surf_link_sharing_policy_t
  35                             policy, xbt_dict_t properties)
  36 {
  37   link_CM02_t nw_link = (link_CM02_t)
  38     surf_resource_lmm_new(sizeof(s_link_CM02_t),
  39                           surf_network_model, name, properties,
  40                           network_maxmin_system,
  41                           sg_bandwidth_factor * bw_initial,
  42                           history,
  43                           state_initial, state_trace,
  44                           bw_initial, bw_trace);
  45
  46   xbt_assert1(!xbt_dict_get_or_null(surf_network_model->resource_set, name),
  47               "Link '%s' declared several times in the platform file.", name);
  48
  49   nw_link->lat_current = lat_initial;
  50   if (lat_trace)
  51     nw_link->lat_event =
  52       tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
  53
  54   if (policy == SURF_LINK_FATPIPE)
  55     lmm_constraint_shared(nw_link->lmm_resource.constraint);
  56
  57   xbt_dict_set(surf_network_model->resource_set, name, nw_link,
  58                surf_resource_free);
  59 #ifdef HAVE_TRACING
  60   TRACE_surf_net_link_new (name, bw_initial, lat_initial);
  61 #endif
  62
  63   return nw_link;
  64 }
  65
  66 static void net_parse_link_init(void)
  67 {
  68   char *name_link;
  69   double bw_initial;
  70   tmgr_trace_t bw_trace;
  71   double lat_initial;
  72   tmgr_trace_t lat_trace;
  73   e_surf_resource_state_t state_initial_link = SURF_RESOURCE_ON;
  74   e_surf_link_sharing_policy_t policy_initial_link = SURF_LINK_SHARED;
  75   tmgr_trace_t state_trace;
  76
  77   name_link = xbt_strdup(A_surfxml_link_id);
  78   surf_parse_get_double(&bw_initial, A_surfxml_link_bandwidth);
  79   bw_trace = tmgr_trace_new(A_surfxml_link_bandwidth_file);
  80   surf_parse_get_double(&lat_initial, A_surfxml_link_latency);
  81   lat_trace = tmgr_trace_new(A_surfxml_link_latency_file);
  82
  83   xbt_assert0((A_surfxml_link_state == A_surfxml_link_state_ON)
  84               || (A_surfxml_link_state ==
  85                   A_surfxml_link_state_OFF), "Invalid state");
  86   if (A_surfxml_link_state == A_surfxml_link_state_ON)
  87     state_initial_link = SURF_RESOURCE_ON;
  88   else if (A_surfxml_link_state == A_surfxml_link_state_OFF)
  89     state_initial_link = SURF_RESOURCE_OFF;
  90
  91   if (A_surfxml_link_sharing_policy == A_surfxml_link_sharing_policy_SHARED)
  92     policy_initial_link = SURF_LINK_SHARED;
  93   else if (A_surfxml_link_sharing_policy ==
  94            A_surfxml_link_sharing_policy_FATPIPE)
  95     policy_initial_link = SURF_LINK_FATPIPE;
  96
  97   state_trace = tmgr_trace_new(A_surfxml_link_state_file);
  98
  99   net_link_new(name_link, bw_initial, bw_trace,
 100            lat_initial, lat_trace, state_initial_link, state_trace,
 101            policy_initial_link, xbt_dict_new());
 102
 103 }
 104
 105 static void net_add_traces(void)
 106 {
 107   xbt_dict_cursor_t cursor = NULL;
 108   char *trace_name, *elm;
 109
 110   static int called = 0;
 111   if (called)
 112     return;
 113   called = 1;
 114
 115   /* connect all traces relative to network */
 116   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 117     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 118     link_CM02_t link =
 119       xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 120
 121     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 122                 trace_name, elm);
 123     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 124                 trace_name, elm);
 125
 126     link->lmm_resource.state_event =
 127       tmgr_history_add_trace(history, trace, 0.0, 0, link);
 128   }
 129
 130   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 131     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 132     link_CM02_t link =
 133       xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 134
 135     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 136                 trace_name, elm);
 137     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 138                 trace_name, elm);
 139
 140     link->lmm_resource.power.event =
 141       tmgr_history_add_trace(history, trace, 0.0, 0, link);
 142   }
 143
 144   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 145     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 146     link_CM02_t link =
 147       xbt_dict_get_or_null(surf_network_model->resource_set, elm);
 148
 149     xbt_assert2(link, "Cannot connect trace %s to link %s: link undefined",
 150                 trace_name, elm);
 151     xbt_assert2(trace, "Cannot connect trace %s to link %s: trace undefined",
 152                 trace_name, elm);
 153
 154     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 155   }
 156 }
 157
 158 static void net_define_callbacks(const char *file)
 159 {
 160   /* Figuring out the network links */
 161   surfxml_add_callback(STag_surfxml_link_cb_list, &net_parse_link_init);
 162   surfxml_add_callback(ETag_surfxml_platform_cb_list, &net_add_traces);
 163 }
 164
 165 static int net_resource_used(void *resource_id)
 166 {
 167   return lmm_constraint_used(network_maxmin_system,
 168                              ((surf_resource_lmm_t) resource_id)->constraint);
 169 }
 170
 171 static int net_action_unref(surf_action_t action)
 172 {
 173   action->refcount--;
 174   if (!action->refcount) {
 175     xbt_swag_remove(action, action->state_set);
 176     if (((surf_action_network_CM02_t) action)->variable)
 177       lmm_variable_free(network_maxmin_system,
 178                         ((surf_action_network_CM02_t) action)->variable);
 179     free(action);
 180     return 1;
 181   }
 182   return 0;
 183 }
 184
 185 static void net_action_cancel(surf_action_t action)
 186 {
 187   surf_network_model->action_state_set((surf_action_t) action,
 188                                        SURF_ACTION_FAILED);
 189   return;
 190 }
 191
 192 static void net_action_recycle(surf_action_t action)
 193 {
 194   return;
 195 }
 196
 197 static double net_action_get_remains(surf_action_t action)
 198 {
 199   return action->remains;
 200 }
 201
 202 static double net_share_resources(double now)
 203 {
 204   s_surf_action_network_CM02_t s_action;
 205   surf_action_network_CM02_t action = NULL;
 206   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 207   double min;
 208
 209   min = generic_maxmin_share_resources(running_actions,
 210                                        xbt_swag_offset(s_action,
 211                                                        variable),
 212                                        network_maxmin_system, network_solve);
 213
 214 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 215
 216   xbt_swag_foreach(action, running_actions) {
 217     if (action->latency > 0) {
 218       if (min < 0)
 219         min = action->latency;
 220       else if (action->latency < min)
 221         min = action->latency;
 222     }
 223   }
 224
 225   return min;
 226 }
 227
 228 static void net_update_actions_state(double now, double delta)
 229 {
 230   double deltap = 0.0;
 231   surf_action_network_CM02_t action = NULL;
 232   surf_action_network_CM02_t next_action = NULL;
 233   xbt_swag_t running_actions = surf_network_model->states.running_action_set;
 234   /*
 235      xbt_swag_t failed_actions =
 236      surf_network_model->states.failed_action_set;
 237    */
 238
 239   xbt_swag_foreach_safe(action, next_action, running_actions) {
 240
 241 #ifdef HAVE_TRACING
 242     TRACE_surf_update_action_state (action, action->generic_action.data,
 243         lmm_variable_getvalue(action->variable), "BandwidthUsed", now-delta, delta);
 244
 245     xbt_dynar_t route = used_routing->get_route(action->src, action->dst);
 246     link_CM02_t link;
 247     unsigned int i;
 248     xbt_dynar_foreach(route, i, link) {
 249       TRACE_surf_update_action_state_net_resource (link->lmm_resource.generic_resource.name,
 250           action->generic_action.data, lmm_variable_getvalue(action->variable), now-delta, delta);
 251     }
 252 #endif
 253
 254     deltap = delta;
 255     if (action->latency > 0) {
 256       if (action->latency > deltap) {
 257         double_update(&(action->latency), deltap);
 258         deltap = 0.0;
 259       } else {
 260         double_update(&(deltap), action->latency);
 261         action->latency = 0.0;
 262       }
 263       if ((action->latency == 0.0) && !(action->suspended))
 264         lmm_update_variable_weight(network_maxmin_system, action->variable,
 265                                    action->weight);
 266     }
 267     double_update(&(action->generic_action.remains),
 268                   lmm_variable_getvalue(action->variable) * deltap);
 269     if (action->generic_action.max_duration != NO_MAX_DURATION)
 270       double_update(&(action->generic_action.max_duration), delta);
 271
 272     if ((action->generic_action.remains <= 0) &&
 273         (lmm_get_variable_weight(action->variable) > 0)) {
 274       action->generic_action.finish = surf_get_clock();
 275       surf_network_model->action_state_set((surf_action_t) action,
 276                                            SURF_ACTION_DONE);
 277     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 278                && (action->generic_action.max_duration <= 0)) {
 279       action->generic_action.finish = surf_get_clock();
 280       surf_network_model->action_state_set((surf_action_t) action,
 281                                            SURF_ACTION_DONE);
 282     }
 283   }
 284
 285   return;
 286 }
 287
 288 static void net_update_resource_state(void *id,
 289                                   tmgr_trace_event_t event_type,
 290                                   double value, double date)
 291 {
 292   link_CM02_t nw_link = id;
 293   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 294   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 295   /*     value, event_type); */
 296
 297   if (event_type == nw_link->lmm_resource.power.event) {
 298     double delta =
 299       sg_weight_S_parameter / value - sg_weight_S_parameter /
 300       (nw_link->lmm_resource.power.peak * nw_link->lmm_resource.power.scale);
 301     lmm_variable_t var = NULL;
 302     lmm_element_t elem = NULL;
 303     surf_action_network_CM02_t action = NULL;
 304
 305     nw_link->lmm_resource.power.peak = value;
 306     lmm_update_constraint_bound(network_maxmin_system,
 307                                 nw_link->lmm_resource.constraint,
 308                                 sg_bandwidth_factor *
 309                                 (nw_link->lmm_resource.power.peak *
 310                                  nw_link->lmm_resource.power.scale));
 311 #ifdef HAVE_TRACING
 312     TRACE_surf_link_set_bandwidth (date, nw_link->lmm_resource.generic_resource.name, sg_bandwidth_factor * (nw_link->lmm_resource.power.peak * nw_link->lmm_resource.power.scale));
 313 #endif
 314     if (sg_weight_S_parameter > 0) {
 315       while ((var = lmm_get_var_from_cnst
 316               (network_maxmin_system, nw_link->lmm_resource.constraint,
 317                &elem))) {
 318         action = lmm_variable_id(var);
 319         action->weight += delta;
 320         if (!(action->suspended))
 321           lmm_update_variable_weight(network_maxmin_system, action->variable,
 322                                      action->weight);
 323       }
 324     }
 325     if (tmgr_trace_event_free(event_type))
 326       nw_link->lmm_resource.power.event = NULL;
 327   } else if (event_type == nw_link->lat_event) {
 328     double delta = value - nw_link->lat_current;
 329     lmm_variable_t var = NULL;
 330     lmm_element_t elem = NULL;
 331     surf_action_network_CM02_t action = NULL;
 332
 333     nw_link->lat_current = value;
 334     while ((var = lmm_get_var_from_cnst
 335             (network_maxmin_system, nw_link->lmm_resource.constraint,
 336              &elem))) {
 337       action = lmm_variable_id(var);
 338       action->lat_current += delta;
 339       action->weight += delta;
 340       if (action->rate < 0)
 341         lmm_update_variable_bound(network_maxmin_system, action->variable,
 342                                   sg_tcp_gamma / (2.0 * action->lat_current));
 343       else
 344         lmm_update_variable_bound(network_maxmin_system, action->variable,
 345                                   min(action->rate,
 346                                       sg_tcp_gamma / (2.0 *
 347                                                       action->lat_current)));
 348       if (!(action->suspended))
 349         lmm_update_variable_weight(network_maxmin_system, action->variable,
 350                                    action->weight);
 351
 352     }
 353     if (tmgr_trace_event_free(event_type))
 354       nw_link->lat_event = NULL;
 355   } else if (event_type == nw_link->lmm_resource.state_event) {
 356     if (value > 0)
 357       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 358     else {
 359       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 360       lmm_variable_t var = NULL;
 361       lmm_element_t elem = NULL;
 362
 363       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 364       while ((var = lmm_get_var_from_cnst
 365               (network_maxmin_system, cnst, &elem))) {
 366         surf_action_t action = lmm_variable_id(var);
 367
 368         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 369             surf_action_state_get(action) == SURF_ACTION_READY) {
 370           action->finish = date;
 371           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 372         }
 373       }
 374     }
 375     if (tmgr_trace_event_free(event_type))
 376       nw_link->lmm_resource.state_event = NULL;
 377   } else {
 378     CRITICAL0("Unknown event ! \n");
 379     xbt_abort();
 380   }
 381
 382   return;
 383 }
 384
 385 static surf_action_t net_communicate(const char *src_name, const char *dst_name,
 386                                  int src, int dst, double size, double rate)
 387 {
 388   surf_action_network_CM02_t action = NULL;
 389   /* LARGE PLATFORMS HACK:
 390      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 391      Use the cluster_id for ->id */
 392   xbt_dynar_t route = used_routing->get_route(src, dst);
 393   /* LARGE PLATFORMS HACK:
 394      total_route_size = route_size + src->link_nb + dst->nb */
 395   unsigned int i;
 396
 397   XBT_IN4("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 398   /* LARGE PLATFORMS HACK:
 399      assert on total_route_size */
 400   xbt_assert2(xbt_dynar_length(route),
 401               "You're trying to send data from %s to %s but there is no connection between these two hosts.",
 402               src_name, dst_name);
 403
 404   link_CM02_t link;
 405   int failed = 0;
 406   xbt_dynar_foreach(route, i, link) {
 407     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 408       failed = 1;
 409       break;
 410     }
 411   }
 412   action =
 413     surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 414                     surf_network_model, failed);
 415
 416   xbt_swag_insert(action, action->generic_action.state_set);
 417   action->rate = rate;
 418
 419   action->latency = 0.0;
 420   action->weight = 0.0;
 421   xbt_dynar_foreach(route, i, link) {
 422     action->latency += link->lat_current;
 423     action->weight +=
 424       link->lat_current +
 425       sg_weight_S_parameter /
 426       (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 427   }
 428   /* LARGE PLATFORMS HACK:
 429      Add src->link and dst->link latencies */
 430   action->lat_current = action->latency;
 431   action->latency *= sg_latency_factor;
 432
 433   /* LARGE PLATFORMS HACK:
 434      lmm_variable_new(..., total_route_size) */
 435   if (action->latency > 0)
 436     action->variable =
 437       lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 438                        xbt_dynar_length(route));
 439   else
 440     action->variable =
 441       lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 442                        xbt_dynar_length(route));
 443
 444   if (action->rate < 0) {
 445     if (action->lat_current > 0)
 446       lmm_update_variable_bound(network_maxmin_system, action->variable,
 447                                 sg_tcp_gamma / (2.0 * action->lat_current));
 448     else
 449       lmm_update_variable_bound(network_maxmin_system, action->variable,
 450                                 -1.0);
 451   } else {
 452     if (action->lat_current > 0)
 453       lmm_update_variable_bound(network_maxmin_system, action->variable,
 454                                 min(action->rate,
 455                                     sg_tcp_gamma / (2.0 *
 456                                                     action->lat_current)));
 457     else
 458       lmm_update_variable_bound(network_maxmin_system, action->variable,
 459                                 action->rate);
 460   }
 461
 462   xbt_dynar_foreach(route, i, link) {
 463     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 464                action->variable, 1.0);
 465   }
 466   /* LARGE PLATFORMS HACK:
 467      expand also with src->link and dst->link */
 468
 469   /* saving the src and dst of this communication */
 470   action->src = src;
 471   action->dst = dst;
 472
 473   XBT_OUT;
 474
 475   return (surf_action_t) action;
 476 }
 477
 478 static double net_get_link_bandwidth(const void *link)
 479 {
 480   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 481   return lmm->power.peak * lmm->power.scale;
 482 }
 483
 484 static double net_get_link_latency(const void *link)
 485 {
 486   return ((link_CM02_t) link)->lat_current;
 487 }
 488
 489 static int net_link_shared(const void *link)
 490 {
 491   return lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 492 }
 493
 494 static void net_action_suspend(surf_action_t action)
 495 {
 496   ((surf_action_network_CM02_t) action)->suspended = 1;
 497   lmm_update_variable_weight(network_maxmin_system,
 498                              ((surf_action_network_CM02_t) action)->variable,
 499                              0.0);
 500 }
 501
 502 static void net_action_resume(surf_action_t action)
 503 {
 504   if (((surf_action_network_CM02_t) action)->suspended) {
 505     lmm_update_variable_weight(network_maxmin_system,
 506                                ((surf_action_network_CM02_t)
 507                                 action)->variable,
 508                                ((surf_action_network_CM02_t) action)->weight);
 509     ((surf_action_network_CM02_t) action)->suspended = 0;
 510   }
 511 }
 512
 513 static int net_action_is_suspended(surf_action_t action)
 514 {
 515   return ((surf_action_network_CM02_t) action)->suspended;
 516 }
 517
 518 static void net_action_set_max_duration(surf_action_t action, double duration)
 519 {
 520   action->max_duration = duration;
 521 }
 522
 523 static void net_finalize(void)
 524 {
 525   surf_model_exit(surf_network_model);
 526   surf_network_model = NULL;
 527
 528   used_routing->finalize();
 529   lmm_system_free(network_maxmin_system);
 530   network_maxmin_system = NULL;
 531 }
 532
 533 static void surf_network_model_init_internal(void)
 534 {
 535   surf_network_model = surf_model_init();
 536
 537   surf_network_model->name = "network";
 538   surf_network_model->action_unref = net_action_unref;
 539   surf_network_model->action_cancel = net_action_cancel;
 540   surf_network_model->action_recycle = net_action_recycle;
 541   surf_network_model->get_remains = net_action_get_remains;
 542
 543   surf_network_model->model_private->resource_used = net_resource_used;
 544   surf_network_model->model_private->share_resources = net_share_resources;
 545   surf_network_model->model_private->update_actions_state =
 546     net_update_actions_state;
 547   surf_network_model->model_private->update_resource_state =
 548     net_update_resource_state;
 549   surf_network_model->model_private->finalize = net_finalize;
 550
 551   surf_network_model->suspend = net_action_suspend;
 552   surf_network_model->resume = net_action_resume;
 553   surf_network_model->is_suspended = net_action_is_suspended;
 554   surf_cpu_model->set_max_duration = net_action_set_max_duration;
 555
 556   surf_network_model->extension.network.communicate = net_communicate;
 557   surf_network_model->extension.network.get_link_bandwidth =
 558     net_get_link_bandwidth;
 559   surf_network_model->extension.network.get_link_latency = net_get_link_latency;
 560   surf_network_model->extension.network.link_shared = net_link_shared;
 561
 562   if (!network_maxmin_system)
 563     network_maxmin_system = lmm_system_new();
 564
 565   routing_model_create(sizeof(link_CM02_t),
 566                        net_link_new(xbt_strdup("__loopback__"),
 567                                 498000000, NULL, 0.000015, NULL,
 568                                 SURF_RESOURCE_ON, NULL, SURF_LINK_FATPIPE,
 569                                 NULL));
 570 }
 571
 572 /************************************************************************/
 573 /* New model based on optimizations discussed during this thesis        */
 574 /************************************************************************/
 575 void surf_network_model_init_LegrandVelho(const char *filename)
 576 {
 577
 578   if (surf_network_model)
 579     return;
 580   surf_network_model_init_internal();
 581   net_define_callbacks(filename);
 582   xbt_dynar_push(model_list, &surf_network_model);
 583   network_solve = lmm_solve;
 584
 585   xbt_cfg_setdefault_double(_surf_cfg_set,"network/latency_factor",10.4);
 586   xbt_cfg_setdefault_double(_surf_cfg_set,"network/bandwidth_factor", 0.92);
 587   xbt_cfg_setdefault_double(_surf_cfg_set,"network/weight_S", 8775);
 588
 589   update_model_description(surf_network_model_description,
 590                            "LV08", surf_network_model);
 591 }
 592
 593 /***************************************************************************/
 594 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 595 /***************************************************************************/
 596 /* @TechReport{      rr-lip2002-40, */
 597 /*   author        = {Henri Casanova and Loris Marchal}, */
 598 /*   institution   = {LIP}, */
 599 /*   title         = {A Network Model for Simulation of Grid Application}, */
 600 /*   number        = {2002-40}, */
 601 /*   month         = {oct}, */
 602 /*   year          = {2002} */
 603 /* } */
 604 void surf_network_model_init_CM02(const char *filename)
 605 {
 606
 607   if (surf_network_model)
 608     return;
 609   surf_network_model_init_internal();
 610   net_define_callbacks(filename);
 611   xbt_dynar_push(model_list, &surf_network_model);
 612   network_solve = lmm_solve;
 613
 614   update_model_description(surf_network_model_description,
 615                            "CM02", surf_network_model);
 616 }
 617
 618 void surf_network_model_init_Reno(const char *filename)
 619 {
 620   if (surf_network_model)
 621     return;
 622   surf_network_model_init_internal();
 623   net_define_callbacks(filename);
 624
 625   xbt_dynar_push(model_list, &surf_network_model);
 626   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 627   network_solve = lagrange_solve;
 628
 629   xbt_cfg_setdefault_double(_surf_cfg_set,"network/latency_factor", 10.4);
 630   xbt_cfg_setdefault_double(_surf_cfg_set,"network/bandwidth_factor", 0.92);
 631   xbt_cfg_setdefault_double(_surf_cfg_set,"network/weight_S", 8775);
 632
 633   update_model_description(surf_network_model_description,
 634                            "Reno", surf_network_model);
 635 }
 636
 637
 638 void surf_network_model_init_Reno2(const char *filename)
 639 {
 640   if (surf_network_model)
 641     return;
 642   surf_network_model_init_internal();
 643   net_define_callbacks(filename);
 644
 645   xbt_dynar_push(model_list, &surf_network_model);
 646   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 647                                     func_reno2_fpi);
 648   network_solve = lagrange_solve;
 649
 650   xbt_cfg_setdefault_double(_surf_cfg_set,"network/latency_factor", 10.4);
 651   xbt_cfg_setdefault_double(_surf_cfg_set,"network/bandwidth_factor", 0.92);
 652   xbt_cfg_setdefault_double(_surf_cfg_set,"network/weight_S_parameter", 8775);
 653
 654   update_model_description(surf_network_model_description,
 655                            "Reno2", surf_network_model);
 656 }
 657
 658 void surf_network_model_init_Vegas(const char *filename)
 659 {
 660   if (surf_network_model)
 661     return;
 662   surf_network_model_init_internal();
 663   net_define_callbacks(filename);
 664
 665   xbt_dynar_push(model_list, &surf_network_model);
 666   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 667                                     func_vegas_fpi);
 668   network_solve = lagrange_solve;
 669
 670   xbt_cfg_setdefault_double(_surf_cfg_set,"network/latency_factor", 10.4);
 671   xbt_cfg_setdefault_double(_surf_cfg_set,"network/bandwidth_factor", 0.92);
 672   xbt_cfg_setdefault_double(_surf_cfg_set,"network/weight_S", 8775);
 673
 674   update_model_description(surf_network_model_description,
 675                            "Vegas", surf_network_model);
 676 }