src/surf/network.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "network_private.h"
  16 #include "xbt/log.h"
  17 #include "xbt/str.h"
  18
  19 #include "surf_private.h"
  20 #include "xbt/dict.h"
  21 #include "maxmin_private.h"
  22 #include "surf/surfxml_parse_values.h"
  23 #include "surf/surf_resource.h"
  24 #include "surf/surf_resource_lmm.h"
  25
  26 #undef GENERIC_ACTION
  27 #define GENERIC_ACTION(action) action->generic_action
  28
  29
  30 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  31                                 "Logging specific to the SURF network module");
  32
  33 surf_model_t surf_network_model = NULL;
  34 static lmm_system_t network_maxmin_system = NULL;
  35 static void (*network_solve) (lmm_system_t) = NULL;
  36
  37 double sg_sender_gap = 0.0;
  38 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  39 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  40 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  41
  42 double sg_tcp_gamma = 0.0;
  43 int sg_network_crosstraffic = 0;
  44
  45 xbt_dict_t gap_lookup = NULL;
  46
  47 e_UM_t network_update_mechanism = UM_UNDEFINED;
  48 static int selective_update = 0;
  49
  50 static int net_action_is_suspended(surf_action_t action);
  51 static void net_update_actions_state(double now, double delta);
  52 static void update_action_remaining(double now);
  53
  54 static xbt_swag_t net_modified_set = NULL;
  55 static xbt_heap_t net_action_heap = NULL;
  56 xbt_swag_t keep_track = NULL;
  57 extern int sg_maxmin_selective_update;
  58
  59 #ifdef HAVE_SMPI
  60 static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action);
  61 static void gap_unknown(surf_action_network_CM02_t action);
  62 static void gap_remove(surf_action_network_CM02_t action);
  63 #endif
  64
  65 /* added to manage the communication action's heap */
  66 static void net_action_update_index_heap(void *action, int i)
  67 {
  68   ((surf_action_network_CM02_t) action)->index_heap = i;
  69 }
  70
  71 /* insert action on heap using a given key and a hat (heap_action_type)
  72  * a hat can be of three types for communications:
  73  *
  74  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  75  * LATENCY = this is a heap entry to warn us when the latency is payed
  76  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  77  */
  78 static void heap_insert(surf_action_network_CM02_t    action, double key, enum heap_action_type hat){
  79   action->hat = hat;
  80   xbt_heap_push(net_action_heap, action, key);
  81 }
  82
  83 static void heap_remove(surf_action_network_CM02_t action){
  84   action->hat = NONE;
  85   if(((surf_action_network_CM02_t) action)->index_heap >= 0){
  86       xbt_heap_remove(net_action_heap,action->index_heap);
  87   }
  88 }
  89
  90 /******************************************************************************/
  91 /*                           Factors callbacks                                */
  92 /******************************************************************************/
  93 static double constant_latency_factor(double size)
  94 {
  95   return sg_latency_factor;
  96 }
  97
  98 static double constant_bandwidth_factor(double size)
  99 {
 100   return sg_bandwidth_factor;
 101 }
 102
 103 static double constant_bandwidth_constraint(double rate, double bound,
 104                                             double size)
 105 {
 106   return rate;
 107 }
 108
 109
 110 /**********************/
 111 /*   SMPI callbacks   */
 112 /**********************/
 113 static double smpi_latency_factor(double size)
 114 {
 115   /* 1 B <= size <= 1 KiB */
 116   if (size <= 1024.0) {
 117     return 1.0056;
 118   }
 119
 120   /* 2 KiB <= size <= 32 KiB */
 121   if (size <= 32768.0) {
 122     return 1.8805;
 123   }
 124
 125   /* 64 KiB <= size <= 4 MiB */
 126   return 22.7111;
 127 }
 128
 129 static double smpi_bandwidth_factor(double size)
 130 {
 131   /* 1 B <= size <= 1 KiB */
 132   if (size <= 1024.0) {
 133     return 0.2758;
 134   }
 135
 136   /* 2 KiB <= size <= 32 KiB */
 137   if (size <= 32768.0) {
 138     return 0.5477;
 139   }
 140
 141   /* 64 KiB <= size <= 4 MiB */
 142   return 0.9359;
 143 }
 144
 145 static double smpi_bandwidth_constraint(double rate, double bound,
 146                                         double size)
 147 {
 148   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 149 }
 150
 151 static double (*latency_factor_callback) (double) =
 152     &constant_latency_factor;
 153 static double (*bandwidth_factor_callback) (double) =
 154     &constant_bandwidth_factor;
 155 static double (*bandwidth_constraint_callback) (double, double, double) =
 156     &constant_bandwidth_constraint;
 157
 158
 159 static void* net_create_resource(const char *name,
 160                                 double bw_initial,
 161                                 tmgr_trace_t bw_trace,
 162                                 double lat_initial,
 163                                 tmgr_trace_t lat_trace,
 164                                 e_surf_resource_state_t
 165                                 state_initial,
 166                                 tmgr_trace_t state_trace,
 167                                 e_surf_link_sharing_policy_t
 168                                 policy, xbt_dict_t properties)
 169 {
 170   link_CM02_t nw_link = (link_CM02_t)
 171       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 172                             surf_network_model, name, properties,
 173                             network_maxmin_system,
 174                             sg_bandwidth_factor * bw_initial,
 175                             history,
 176                             state_initial, state_trace,
 177                             bw_initial, bw_trace);
 178
 179   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 180               "Link '%s' declared several times in the platform file.",
 181               name);
 182
 183   nw_link->lat_current = lat_initial;
 184   if (lat_trace)
 185     nw_link->lat_event =
 186         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 187
 188   if (policy == SURF_LINK_FATPIPE)
 189     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 190
 191   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 192
 193   return nw_link;
 194 }
 195
 196 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 197 {
 198   if(link->policy == SURF_LINK_FULLDUPLEX){
 199     char *link_id;
 200     link_id = bprintf("%s_UP", link->id);
 201           net_create_resource(link_id,
 202                            link->bandwidth,
 203                            link->bandwidth_trace,
 204                            link->latency,
 205                            link->latency_trace,
 206                            link->state,
 207                            link->state_trace,
 208                            link->policy,
 209                            link->properties);
 210           xbt_free(link_id);
 211     link_id = bprintf("%s_DOWN", link->id);
 212     net_create_resource(link_id,
 213                         link->bandwidth,
 214                         link->bandwidth_trace,
 215                         link->latency,
 216                         link->latency_trace,
 217                         link->state,
 218                         link->state_trace,
 219                         link->policy,
 220                         link->properties);
 221     xbt_free(link_id);
 222   }
 223   else{
 224     net_create_resource(link->id,
 225                         link->bandwidth,
 226                         link->bandwidth_trace,
 227                         link->latency,
 228                         link->latency_trace,
 229                         link->state,
 230                         link->state_trace,
 231                         link->policy,
 232                         link->properties);
 233   }
 234 }
 235
 236 static void net_add_traces(void)
 237 {
 238   xbt_dict_cursor_t cursor = NULL;
 239   char *trace_name, *elm;
 240
 241   static int called = 0;
 242   if (called)
 243     return;
 244   called = 1;
 245
 246   /* connect all traces relative to network */
 247   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 248     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 249     link_CM02_t link =
 250                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 251
 252     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 253                 trace_name, elm);
 254     xbt_assert(trace,
 255                 "Cannot connect trace %s to link %s: trace undefined",
 256                 trace_name, elm);
 257
 258     link->lmm_resource.state_event =
 259         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 260   }
 261
 262   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 263     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 264     link_CM02_t link =
 265                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 266
 267     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 268                 trace_name, elm);
 269     xbt_assert(trace,
 270                 "Cannot connect trace %s to link %s: trace undefined",
 271                 trace_name, elm);
 272
 273     link->lmm_resource.power.event =
 274         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 =
 280                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 281
 282     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 283                 trace_name, elm);
 284     xbt_assert(trace,
 285                 "Cannot connect trace %s to link %s: trace undefined",
 286                 trace_name, elm);
 287
 288     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 289   }
 290 }
 291
 292 static void net_define_callbacks(void)
 293 {
 294   /* Figuring out the network links */
 295   sg_platf_link_add_cb(net_parse_link_init);
 296   sg_platf_postparse_add_cb(net_add_traces);
 297 }
 298
 299 static int net_resource_used(void *resource_id)
 300 {
 301   return lmm_constraint_used(network_maxmin_system,
 302                              ((surf_resource_lmm_t)
 303                               resource_id)->constraint);
 304 }
 305
 306 static int net_action_unref(surf_action_t action)
 307 {
 308   action->refcount--;
 309   if (!action->refcount) {
 310     xbt_swag_remove(action, action->state_set);
 311     if (((surf_action_network_CM02_t) action)->variable){
 312       lmm_variable_free(network_maxmin_system,
 313                         ((surf_action_network_CM02_t) action)->variable);
 314     }
 315     if(network_update_mechanism == UM_LAZY){// remove action from the heap
 316       heap_remove((surf_action_network_CM02_t) action);
 317       xbt_swag_remove(action, net_modified_set);
 318     }
 319 #ifdef HAVE_TRACING
 320     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 321     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 322     xbt_free(action->category);
 323 #endif
 324     surf_action_free(&action);
 325     return 1;
 326   }
 327   return 0;
 328 }
 329
 330
 331
 332 static void net_action_cancel(surf_action_t action)
 333 {
 334   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 335   if(network_update_mechanism == UM_LAZY){// remove action from the heap
 336     xbt_swag_remove(action, net_modified_set);
 337     heap_remove((surf_action_network_CM02_t) action);
 338   }
 339 }
 340
 341 void net_action_recycle(surf_action_t action)
 342 {
 343   return;
 344 }
 345
 346 #ifdef HAVE_LATENCY_BOUND_TRACKING
 347 static int net_get_link_latency_limited(surf_action_t action)
 348 {
 349   return action->latency_limited;
 350 }
 351 #endif
 352
 353 double net_action_get_remains(surf_action_t action)
 354 {
 355   if(network_update_mechanism == UM_LAZY)/* update remains before return it */
 356     update_action_remaining(surf_get_clock());
 357   return action->remains;
 358 }
 359
 360 static void update_action_remaining(double now){
 361   surf_action_network_CM02_t action = NULL;
 362   double delta = 0.0;
 363
 364   xbt_swag_foreach(action, net_modified_set) {
 365
 366     if(action->suspended != 0){
 367         continue;
 368     }
 369
 370     delta = now - action->last_update;
 371
 372     double_update(&(action->generic_action.remains),
 373                   lmm_variable_getvalue(action->variable) * delta);
 374
 375     if (action->generic_action.max_duration != NO_MAX_DURATION)
 376       double_update(&(action->generic_action.max_duration), delta);
 377
 378     if ((action->generic_action.remains <= 0) &&
 379         (lmm_get_variable_weight(action->variable) > 0)) {
 380       action->generic_action.finish = surf_get_clock();
 381       surf_network_model->action_state_set((surf_action_t) action,
 382                                            SURF_ACTION_DONE);
 383       heap_remove(action);
 384     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 385                && (action->generic_action.max_duration <= 0)) {
 386       action->generic_action.finish = surf_get_clock();
 387       surf_network_model->action_state_set((surf_action_t) action,
 388                                            SURF_ACTION_DONE);
 389       heap_remove(action);
 390     }
 391
 392     action->last_update = now;
 393   }
 394 }
 395
 396 static double net_share_resources_full(double now)
 397 {
 398   s_surf_action_network_CM02_t s_action;
 399   surf_action_network_CM02_t action = NULL;
 400   xbt_swag_t running_actions =
 401       surf_network_model->states.running_action_set;
 402   double min;
 403
 404   min = generic_maxmin_share_resources(running_actions,
 405                                        xbt_swag_offset(s_action,
 406                                                        variable),
 407                                        network_maxmin_system,
 408                                        network_solve);
 409
 410 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 411
 412   xbt_swag_foreach(action, running_actions) {
 413 #ifdef HAVE_LATENCY_BOUND_TRACKING
 414     if (lmm_is_variable_limited_by_latency(action->variable)) {
 415       (action->generic_action).latency_limited = 1;
 416     } else {
 417       (action->generic_action).latency_limited = 0;
 418     }
 419 #endif
 420     if (action->latency > 0) {
 421       if (min < 0)
 422         min = action->latency;
 423       else if (action->latency < min)
 424         min = action->latency;
 425     }
 426   }
 427
 428   XBT_DEBUG("Min of share resources %f", min);
 429
 430   return min;
 431 }
 432
 433 static double net_share_resources_lazy(double now)
 434 {
 435   surf_action_network_CM02_t action = NULL;
 436   double min=-1;
 437   double value;
 438
 439   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(net_modified_set));
 440   update_action_remaining(now);
 441
 442   keep_track = net_modified_set;
 443   lmm_solve(network_maxmin_system);
 444   keep_track = NULL;
 445
 446   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(net_modified_set));
 447
 448    xbt_swag_foreach(action, net_modified_set) {
 449      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 450        continue;
 451      }
 452
 453      /* bogus priority, skip it */
 454      if (GENERIC_ACTION(action).priority <= 0){
 455          continue;
 456      }
 457
 458      min = -1;
 459      value = lmm_variable_getvalue(action->variable);
 460      if (value > 0) {
 461          if (GENERIC_ACTION(action).remains > 0) {
 462              value = GENERIC_ACTION(action).remains / value;
 463              min = now + value;
 464          } else {
 465              value = 0.0;
 466              min = now;
 467          }
 468      }
 469
 470      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 471          && (min == -1
 472              || GENERIC_ACTION(action).start +
 473              GENERIC_ACTION(action).max_duration < min)){
 474        min =   GENERIC_ACTION(action).start +
 475                GENERIC_ACTION(action).max_duration;
 476      }
 477
 478      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 479                 GENERIC_ACTION(action).start, now + value,
 480                 GENERIC_ACTION(action).max_duration);
 481
 482
 483
 484      if (action->index_heap >= 0) {
 485          heap_remove((surf_action_network_CM02_t) action);
 486      }
 487
 488      if (min != -1) {
 489          heap_insert((surf_action_network_CM02_t) action, min, NORMAL);
 490          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 491      }
 492    }
 493
 494    //hereafter must have already the min value for this resource model
 495    if(xbt_heap_size(net_action_heap) > 0 ){
 496        min = xbt_heap_maxkey(net_action_heap) - now ;
 497    }else{
 498        min = -1;
 499    }
 500
 501    XBT_DEBUG("The minimum with the HEAP %lf", min);
 502
 503
 504   return min;
 505 }
 506
 507 static void net_update_actions_state_full(double now, double delta)
 508 {
 509   double deltap = 0.0;
 510   surf_action_network_CM02_t action = NULL;
 511   surf_action_network_CM02_t next_action = NULL;
 512   xbt_swag_t running_actions =
 513       surf_network_model->states.running_action_set;
 514   /*
 515      xbt_swag_t failed_actions =
 516      surf_network_model->states.failed_action_set;
 517    */
 518
 519   xbt_swag_foreach_safe(action, next_action, running_actions) {
 520     deltap = delta;
 521     if (action->latency > 0) {
 522       if (action->latency > deltap) {
 523         double_update(&(action->latency), deltap);
 524         deltap = 0.0;
 525       } else {
 526         double_update(&(deltap), action->latency);
 527         action->latency = 0.0;
 528       }
 529       if ((action->latency == 0.0) && !(action->suspended))
 530         lmm_update_variable_weight(network_maxmin_system, action->variable,
 531                                    action->weight);
 532     }
 533 #ifdef HAVE_TRACING
 534     if (TRACE_is_enabled()) {
 535       xbt_dynar_t route=NULL;
 536       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 537       link_CM02_t link;
 538       unsigned int i;
 539       xbt_dynar_foreach(route, i, link) {
 540         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 541                                         action->generic_action.data,
 542                                         (surf_action_t) action,
 543                                         lmm_variable_getvalue
 544                                         (action->variable), now - delta,
 545                                         delta);
 546       }
 547     }
 548 #endif
 549     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 550         /* There is actually no link used, hence an infinite bandwidth.
 551          * This happens often when using models like vivaldi.
 552          * In such case, just make sure that the action completes immediately.
 553          */
 554       double_update(&(action->generic_action.remains),
 555           action->generic_action.remains);
 556     }
 557     double_update(&(action->generic_action.remains),
 558                   lmm_variable_getvalue(action->variable) * deltap);
 559     if (action->generic_action.max_duration != NO_MAX_DURATION)
 560       double_update(&(action->generic_action.max_duration), delta);
 561
 562     if ((action->generic_action.remains <= 0) &&
 563         (lmm_get_variable_weight(action->variable) > 0)) {
 564       action->generic_action.finish = surf_get_clock();
 565       surf_network_model->action_state_set((surf_action_t) action,
 566                                            SURF_ACTION_DONE);
 567 #ifdef HAVE_SMPI
 568       gap_remove(action);
 569 #endif
 570     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 571                && (action->generic_action.max_duration <= 0)) {
 572       action->generic_action.finish = surf_get_clock();
 573       surf_network_model->action_state_set((surf_action_t) action,
 574                                            SURF_ACTION_DONE);
 575 #ifdef HAVE_SMPI
 576       gap_remove(action);
 577 #endif
 578     }
 579   }
 580
 581   return;
 582 }
 583
 584 static void net_update_actions_state_lazy(double now, double delta)
 585 {
 586   surf_action_network_CM02_t action = NULL;
 587
 588   while ((xbt_heap_size(net_action_heap) > 0)
 589          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 590     action = xbt_heap_pop(net_action_heap);
 591     XBT_DEBUG("Action %p: finish", action);
 592     GENERIC_ACTION(action).finish = surf_get_clock();
 593
 594     // if I am wearing a latency heat
 595     if( action->hat ==  LATENCY){
 596         lmm_update_variable_weight(network_maxmin_system, action->variable,
 597                                            action->weight);
 598         heap_remove(action);
 599         action->last_update = surf_get_clock();
 600
 601         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 602 #ifdef HAVE_LATENCY_BOUND_TRACKING
 603           GENERIC_ACTION(action).latency_limited = 0;
 604 #endif
 605
 606     // if I am wearing a max_duration or normal hat
 607     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 608         // no need to communicate anymore
 609         // assume that flows that reached max_duration have remaining of 0
 610         GENERIC_ACTION(action).remains = 0;
 611         action->generic_action.finish = surf_get_clock();
 612               surf_network_model->action_state_set((surf_action_t) action,
 613                                                    SURF_ACTION_DONE);
 614         heap_remove(action);
 615     }
 616   }
 617   return;
 618 }
 619
 620 static void net_update_resource_state(void *id,
 621                                       tmgr_trace_event_t event_type,
 622                                       double value, double date)
 623 {
 624   link_CM02_t nw_link = id;
 625   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 626   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 627   /*     value, event_type); */
 628
 629   if (event_type == nw_link->lmm_resource.power.event) {
 630     double delta =
 631         sg_weight_S_parameter / value - sg_weight_S_parameter /
 632         (nw_link->lmm_resource.power.peak *
 633          nw_link->lmm_resource.power.scale);
 634     lmm_variable_t var = NULL;
 635     lmm_element_t elem = NULL;
 636     surf_action_network_CM02_t action = NULL;
 637
 638     nw_link->lmm_resource.power.peak = value;
 639     lmm_update_constraint_bound(network_maxmin_system,
 640                                 nw_link->lmm_resource.constraint,
 641                                 sg_bandwidth_factor *
 642                                 (nw_link->lmm_resource.power.peak *
 643                                  nw_link->lmm_resource.power.scale));
 644 #ifdef HAVE_TRACING
 645     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 646                                   sg_bandwidth_factor *
 647                                   (nw_link->lmm_resource.power.peak *
 648                                    nw_link->lmm_resource.power.scale));
 649 #endif
 650     if (sg_weight_S_parameter > 0) {
 651       while ((var = lmm_get_var_from_cnst
 652               (network_maxmin_system, nw_link->lmm_resource.constraint,
 653                &elem))) {
 654         action = lmm_variable_id(var);
 655         action->weight += delta;
 656         if (!(action->suspended))
 657           lmm_update_variable_weight(network_maxmin_system,
 658                                      action->variable, action->weight);
 659       }
 660     }
 661     if (tmgr_trace_event_free(event_type))
 662       nw_link->lmm_resource.power.event = NULL;
 663   } else if (event_type == nw_link->lat_event) {
 664     double delta = value - nw_link->lat_current;
 665     lmm_variable_t var = NULL;
 666     lmm_element_t elem = NULL;
 667     surf_action_network_CM02_t action = NULL;
 668
 669     nw_link->lat_current = value;
 670     while ((var = lmm_get_var_from_cnst
 671             (network_maxmin_system, nw_link->lmm_resource.constraint,
 672              &elem))) {
 673       action = lmm_variable_id(var);
 674       action->lat_current += delta;
 675       action->weight += delta;
 676       if (action->rate < 0)
 677         lmm_update_variable_bound(network_maxmin_system, action->variable,
 678                                   sg_tcp_gamma / (2.0 *
 679                                                   action->lat_current));
 680       else {
 681         lmm_update_variable_bound(network_maxmin_system, action->variable,
 682                                   min(action->rate,
 683                                       sg_tcp_gamma / (2.0 *
 684                                                       action->lat_current)));
 685
 686         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 687           XBT_INFO("Flow is limited BYBANDWIDTH");
 688         } else {
 689           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 690                 action->lat_current);
 691         }
 692       }
 693       if (!(action->suspended))
 694         lmm_update_variable_weight(network_maxmin_system, action->variable,
 695                                    action->weight);
 696
 697     }
 698     if (tmgr_trace_event_free(event_type))
 699       nw_link->lat_event = NULL;
 700   } else if (event_type == nw_link->lmm_resource.state_event) {
 701     if (value > 0)
 702       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 703     else {
 704       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 705       lmm_variable_t var = NULL;
 706       lmm_element_t elem = NULL;
 707
 708       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 709       while ((var = lmm_get_var_from_cnst
 710               (network_maxmin_system, cnst, &elem))) {
 711         surf_action_t action = lmm_variable_id(var);
 712
 713         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 714             surf_action_state_get(action) == SURF_ACTION_READY) {
 715           action->finish = date;
 716           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 717         }
 718       }
 719     }
 720     if (tmgr_trace_event_free(event_type))
 721       nw_link->lmm_resource.state_event = NULL;
 722   } else {
 723     XBT_CRITICAL("Unknown event ! \n");
 724     xbt_abort();
 725   }
 726
 727   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 728   return;
 729 }
 730
 731
 732 static surf_action_t net_communicate(const char *src_name,
 733                                      const char *dst_name, double size,
 734                                      double rate)
 735 {
 736   unsigned int i;
 737   link_CM02_t link;
 738   int failed = 0;
 739   surf_action_network_CM02_t action = NULL;
 740   double bandwidth_bound;
 741   double latency=0.0;
 742   /* LARGE PLATFORMS HACK:
 743      Add a link_CM02_t *link and a int link_nb to network_card_CM02_t. It will represent local links for this node
 744      Use the cluster_id for ->id */
 745
 746   xbt_dynar_t back_route = NULL;
 747   int constraints_per_variable = 0;
 748   // I need to have the forward and backward routes at the same time, so allocate "route". That way, the routing wont clean it up
 749   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 750   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 751
 752   if (sg_network_crosstraffic == 1) {
 753     // FIXME: fill route directly (unclear: check with blame who put the FIXME)
 754     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 755   }
 756
 757   /* LARGE PLATFORMS HACK:
 758      total_route_size = route_size + src->link_nb + dst->nb */
 759
 760   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 761   /* LARGE PLATFORMS HACK:
 762      assert on total_route_size */
 763   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 764               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 765               src_name, dst_name);
 766
 767   xbt_dynar_foreach(route, i, link) {
 768     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 769       failed = 1;
 770       break;
 771     }
 772   }
 773   if (sg_network_crosstraffic == 1) {
 774     xbt_dynar_foreach(back_route, i, link) {
 775       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 776         failed = 1;
 777         break;
 778       }
 779     }
 780   }
 781
 782   action =
 783       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 784                       surf_network_model, failed);
 785 #ifdef HAVE_LATENCY_BOUND_TRACKING
 786   (action->generic_action).latency_limited = 0;
 787 #endif
 788   action->weight = action->latency = latency;
 789
 790   xbt_swag_insert(action, action->generic_action.state_set);
 791   action->rate = rate;
 792   if(network_update_mechanism == UM_LAZY){
 793     action->index_heap = -1;
 794     action->latency = 0.0;
 795     action->weight = 0.0;
 796     action->last_update = surf_get_clock();
 797   }
 798
 799   bandwidth_bound = -1.0;
 800   xbt_dynar_foreach(route, i, link) {
 801     action->weight +=
 802         sg_weight_S_parameter /
 803         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 804     if (bandwidth_bound < 0.0)
 805       bandwidth_bound =
 806           bandwidth_factor_callback(size) *
 807           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 808     else
 809       bandwidth_bound =
 810           min(bandwidth_bound,
 811               bandwidth_factor_callback(size) *
 812               (link->lmm_resource.power.peak *
 813                link->lmm_resource.power.scale));
 814   }
 815   /* LARGE PLATFORMS HACK:
 816      Add src->link and dst->link latencies */
 817   action->lat_current = action->latency;
 818   action->latency *= latency_factor_callback(size);
 819   action->rate =
 820       bandwidth_constraint_callback(action->rate, bandwidth_bound,
 821                                         size);
 822 #ifdef HAVE_SMPI
 823   if(!xbt_dynar_is_empty(route)) {
 824     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 825     gap_append(size, link, action);
 826     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 827            action, src_name, dst_name, action->sender.gap, action->latency);
 828   } else {
 829     gap_unknown(action);
 830   }
 831 #endif
 832
 833   /* LARGE PLATFORMS HACK:
 834      lmm_variable_new(..., total_route_size) */
 835   if (back_route != NULL) {
 836     constraints_per_variable =
 837         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 838   } else {
 839     constraints_per_variable = xbt_dynar_length(route);
 840   }
 841
 842   if (action->latency > 0){
 843       action->variable =
 844         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 845                          constraints_per_variable);
 846     if(network_update_mechanism == UM_LAZY){
 847       // add to the heap the event when the latency is payed
 848       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 849       heap_insert(action, action->latency + action->last_update, LATENCY);
 850     }
 851 #ifdef HAVE_LATENCY_BOUND_TRACKING
 852         (action->generic_action).latency_limited = 1;
 853 #endif
 854   }
 855   else
 856     action->variable =
 857         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 858                          constraints_per_variable);
 859
 860   if (action->rate < 0) {
 861     if (action->lat_current > 0)
 862       lmm_update_variable_bound(network_maxmin_system, action->variable,
 863                                 sg_tcp_gamma / (2.0 *
 864                                                 action->lat_current));
 865     else
 866       lmm_update_variable_bound(network_maxmin_system, action->variable,
 867                                 -1.0);
 868   } else {
 869     if (action->lat_current > 0)
 870       lmm_update_variable_bound(network_maxmin_system, action->variable,
 871                                 min(action->rate,
 872                                     sg_tcp_gamma / (2.0 *
 873                                                     action->lat_current)));
 874     else
 875       lmm_update_variable_bound(network_maxmin_system, action->variable,
 876                                 action->rate);
 877   }
 878
 879   xbt_dynar_foreach(route, i, link) {
 880     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 881                action->variable, 1.0);
 882   }
 883
 884   if (sg_network_crosstraffic == 1) {
 885     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 886     xbt_dynar_foreach(back_route, i, link) {
 887       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 888                  action->variable, .05);
 889     }
 890   }
 891
 892   /* LARGE PLATFORMS HACK:
 893      expand also with src->link and dst->link */
 894 #ifdef HAVE_TRACING
 895   if (TRACE_is_enabled()) {
 896     action->src_name = xbt_strdup(src_name);
 897     action->dst_name = xbt_strdup(dst_name);
 898   } else {
 899     action->src_name = action->dst_name = NULL;
 900   }
 901 #endif
 902
 903   xbt_dynar_free(&route);
 904   XBT_OUT();
 905
 906   return (surf_action_t) action;
 907 }
 908
 909 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 910 {
 911   xbt_dynar_t route=NULL;
 912   routing_get_route_and_latency(src, dst,&route,NULL);
 913   return route;
 914 }
 915
 916 static double net_get_link_bandwidth(const void *link)
 917 {
 918   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 919   return lmm->power.peak * lmm->power.scale;
 920 }
 921
 922 static double net_get_link_latency(const void *link)
 923 {
 924   return ((link_CM02_t) link)->lat_current;
 925 }
 926
 927 static int net_link_shared(const void *link)
 928 {
 929   return
 930       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 931 }
 932
 933 static void net_action_suspend(surf_action_t action)
 934 {
 935   ((surf_action_network_CM02_t) action)->suspended = 1;
 936   lmm_update_variable_weight(network_maxmin_system,
 937                              ((surf_action_network_CM02_t)
 938                               action)->variable, 0.0);
 939
 940   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 941     heap_remove((surf_action_network_CM02_t) action);
 942 }
 943
 944 static void net_action_resume(surf_action_t action)
 945 {
 946   if (((surf_action_network_CM02_t) action)->suspended) {
 947     lmm_update_variable_weight(network_maxmin_system,
 948                                ((surf_action_network_CM02_t)
 949                                 action)->variable,
 950                                ((surf_action_network_CM02_t)
 951                                 action)->weight);
 952     ((surf_action_network_CM02_t) action)->suspended = 0;
 953     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 954       heap_remove((surf_action_network_CM02_t) action);
 955   }
 956 }
 957
 958 static int net_action_is_suspended(surf_action_t action)
 959 {
 960   return ((surf_action_network_CM02_t) action)->suspended;
 961 }
 962
 963 void net_action_set_max_duration(surf_action_t action, double duration)
 964 {
 965   action->max_duration = duration;
 966   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 967     heap_remove((surf_action_network_CM02_t) action);
 968 }
 969
 970 #ifdef HAVE_TRACING
 971 static void net_action_set_category(surf_action_t action, const char *category)
 972 {
 973   action->category = xbt_strdup (category);
 974 }
 975 #endif
 976
 977 static void net_finalize(void)
 978 {
 979   surf_model_exit(surf_network_model);
 980   surf_network_model = NULL;
 981
 982   lmm_system_free(network_maxmin_system);
 983   network_maxmin_system = NULL;
 984
 985   if(network_update_mechanism == UM_LAZY){
 986     xbt_heap_free(net_action_heap);
 987     xbt_swag_free(net_modified_set);
 988   }
 989 }
 990
 991 #ifdef HAVE_SMPI
 992 static void gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
 993    const char* src = link->lmm_resource.generic_resource.name;
 994    xbt_fifo_t fifo;
 995    surf_action_network_CM02_t last_action;
 996    double bw;
 997
 998    if(sg_sender_gap > 0.0) {
 999       if(!gap_lookup) {
1000          gap_lookup = xbt_dict_new();
1001       }
1002       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
1003       action->sender.gap = 0.0;
1004       if(fifo && xbt_fifo_size(fifo) > 0) {
1005          /* Compute gap from last send */
1006          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1007          bw = net_get_link_bandwidth(link);
1008          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
1009          action->latency += action->sender.gap;
1010       }
1011       /* Append action as last send */
1012       action->sender.link_name = link->lmm_resource.generic_resource.name;
1013       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1014       if(!fifo) {
1015          fifo = xbt_fifo_new();
1016          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1017       }
1018       action->sender.fifo_item = xbt_fifo_push(fifo, action);
1019       action->sender.size = size;
1020    }
1021 }
1022
1023 static void gap_unknown(surf_action_network_CM02_t action) {
1024    action->sender.gap = 0.0;
1025    action->sender.link_name = NULL;
1026    action->sender.fifo_item = NULL;
1027    action->sender.size = 0.0;
1028 }
1029
1030 static void gap_remove(surf_action_network_CM02_t action) {
1031    xbt_fifo_t fifo;
1032    size_t size;
1033
1034    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1035       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1036       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1037       size = xbt_fifo_size(fifo);
1038       if(size == 0) {
1039          xbt_fifo_free(fifo);
1040          xbt_dict_remove(gap_lookup, action->sender.link_name);
1041          size = xbt_dict_length(gap_lookup);
1042          if(size == 0) {
1043             xbt_dict_free(&gap_lookup);
1044          }
1045       }
1046    }
1047 }
1048 #endif
1049
1050 static void surf_network_model_init_internal(void)
1051 {
1052   s_surf_action_network_CM02_t comm;
1053   surf_network_model = surf_model_init();
1054
1055   surf_network_model->name = "network";
1056   surf_network_model->action_unref = net_action_unref;
1057   surf_network_model->action_cancel = net_action_cancel;
1058   surf_network_model->action_recycle = net_action_recycle;
1059   surf_network_model->get_remains = net_action_get_remains;
1060 #ifdef HAVE_LATENCY_BOUND_TRACKING
1061   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1062 #endif
1063
1064   surf_network_model->model_private->resource_used = net_resource_used;
1065   if(network_update_mechanism == UM_LAZY) {
1066     surf_network_model->model_private->share_resources = net_share_resources_lazy;
1067     surf_network_model->model_private->update_actions_state = net_update_actions_state_lazy;
1068   } else if(network_update_mechanism == UM_FULL) {
1069     surf_network_model->model_private->share_resources = net_share_resources_full;
1070     surf_network_model->model_private->update_actions_state = net_update_actions_state_full;
1071   }
1072
1073   surf_network_model->model_private->update_resource_state =
1074                   net_update_resource_state;
1075   surf_network_model->model_private->finalize = net_finalize;
1076
1077   surf_network_model->suspend = net_action_suspend;
1078   surf_network_model->resume = net_action_resume;
1079   surf_network_model->is_suspended = net_action_is_suspended;
1080   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1081
1082   surf_network_model->extension.network.communicate = net_communicate;
1083   surf_network_model->extension.network.get_route = net_get_route;
1084   surf_network_model->extension.network.get_link_bandwidth =
1085                   net_get_link_bandwidth;
1086   surf_network_model->extension.network.get_link_latency =
1087                   net_get_link_latency;
1088   surf_network_model->extension.network.link_shared = net_link_shared;
1089   surf_network_model->extension.network.add_traces = net_add_traces;
1090   surf_network_model->extension.network.create_resource =
1091                   net_create_resource;
1092
1093  if (!network_maxmin_system)
1094     network_maxmin_system = lmm_system_new(selective_update);
1095
1096  routing_model_create(sizeof(link_CM02_t),
1097       net_create_resource("__loopback__",
1098           498000000, NULL, 0.000015, NULL,
1099           SURF_RESOURCE_ON, NULL,
1100           SURF_LINK_FATPIPE, NULL));
1101
1102   if(network_update_mechanism == UM_LAZY){
1103     net_action_heap = xbt_heap_new(8,NULL);
1104     xbt_heap_set_update_callback(net_action_heap, net_action_update_index_heap);
1105     net_modified_set =
1106         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1107   }
1108 }
1109
1110 static void set_update_mechanism(void) {
1111   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1112   int select = xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1113
1114   if(!strcmp(optim,"Full")) {
1115     network_update_mechanism = UM_FULL;
1116     selective_update = select;
1117   } else if (!strcmp(optim,"Lazy")) {
1118     network_update_mechanism = UM_LAZY;
1119     selective_update = 1;
1120     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"network/maxmin_selective_update")),
1121         "Disabling selective update while using the lazy update mechanism is dumb!");
1122   } else {
1123     xbt_die("Unsupported optimization (%s) for this model",optim);
1124   }
1125 }
1126
1127 /************************************************************************/
1128 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1129 /************************************************************************/
1130 /* @Inproceedings{smpi_ipdps, */
1131 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1132 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1133 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1134 /*  address={Anchorage (Alaska) USA}, */
1135 /*  month=may, */
1136 /*  year={2011} */
1137 /*  } */
1138 void surf_network_model_init_SMPI(void)
1139 {
1140
1141   if (surf_network_model)
1142     return;
1143   set_update_mechanism();
1144
1145   surf_network_model_init_internal();
1146   latency_factor_callback = &smpi_latency_factor;
1147   bandwidth_factor_callback = &smpi_bandwidth_factor;
1148   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1149   net_define_callbacks();
1150   xbt_dynar_push(model_list, &surf_network_model);
1151   network_solve = lmm_solve;
1152
1153   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1154   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1155 }
1156
1157 /************************************************************************/
1158 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1159 /************************************************************************/
1160 /* @techreport{VELHO:2011:HAL-00646896:1, */
1161 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1162 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1163 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1164 /*      type = {Rapport de recherche}, */
1165 /*      institution = {INRIA}, */
1166 /*      number = {RR-7821}, */
1167 /*      year = {2011}, */
1168 /*      month = Nov, */
1169 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1170 /*  } */
1171 void surf_network_model_init_LegrandVelho(void)
1172 {
1173   char *model = xbt_cfg_get_string(_surf_cfg_set, "network/model");
1174
1175   if (surf_network_model)
1176     return;
1177
1178   if(!strcmp(model,"LV08_fullupdate")) {
1179     XBT_WARN("[*Deprecated*. Use --cfg=network/model:LV08 with option --cfg=network/optim:Full instead.]");
1180   }
1181   set_update_mechanism();
1182
1183   surf_network_model_init_internal();
1184   net_define_callbacks();
1185   xbt_dynar_push(model_list, &surf_network_model);
1186   network_solve = lmm_solve;
1187
1188   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4); // 13.01 when callibration is done without phase effects
1189   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.92);// 0.97 when callibration is done without phase effects
1190   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);       // 20537 when callibration is done without phase effects
1191 }
1192
1193 /***************************************************************************/
1194 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1195 /***************************************************************************/
1196 /* @TechReport{      rr-lip2002-40, */
1197 /*   author        = {Henri Casanova and Loris Marchal}, */
1198 /*   institution   = {LIP}, */
1199 /*   title         = {A Network Model for Simulation of Grid Application}, */
1200 /*   number        = {2002-40}, */
1201 /*   month         = {oct}, */
1202 /*   year          = {2002} */
1203 /* } */
1204 void surf_network_model_init_CM02(void)
1205 {
1206
1207   if (surf_network_model)
1208     return;
1209
1210   set_update_mechanism();
1211   surf_network_model_init_internal();
1212   net_define_callbacks();
1213   xbt_dynar_push(model_list, &surf_network_model);
1214   network_solve = lmm_solve;
1215
1216   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1217   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1218   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1219 }
1220
1221 /***************************************************************************/
1222 /* The models from Steven H. Low                                           */
1223 /***************************************************************************/
1224 /* @article{Low03,                                                         */
1225 /*   author={Steven H. Low},                                               */
1226 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1227 /*   year={2003},                                                          */
1228 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1229 /*    volume={11}, number={4},                                             */
1230 /*  }                                                                      */
1231 void surf_network_model_init_Reno(void)
1232 {
1233   if (surf_network_model)
1234     return;
1235
1236   set_update_mechanism();
1237   surf_network_model_init_internal();
1238   net_define_callbacks();
1239
1240   xbt_dynar_push(model_list, &surf_network_model);
1241   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1242                                     func_reno_fpi);
1243   network_solve = lagrange_solve;
1244
1245   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1246   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1247                             0.92);
1248   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1249 }
1250
1251
1252 void surf_network_model_init_Reno2(void)
1253 {
1254   if (surf_network_model)
1255     return;
1256
1257   set_update_mechanism();
1258   surf_network_model_init_internal();
1259   net_define_callbacks();
1260
1261   xbt_dynar_push(model_list, &surf_network_model);
1262   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1263                                     func_reno2_fpi);
1264   network_solve = lagrange_solve;
1265
1266   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1267   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1268                             0.92);
1269   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1270                             8775);
1271 }
1272
1273 void surf_network_model_init_Vegas(void)
1274 {
1275   if (surf_network_model)
1276     return;
1277
1278   set_update_mechanism();
1279   surf_network_model_init_internal();
1280   net_define_callbacks();
1281
1282   xbt_dynar_push(model_list, &surf_network_model);
1283   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1284                                     func_vegas_fpi);
1285   network_solve = lagrange_solve;
1286
1287   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1288   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1289                             0.92);
1290   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1291 }