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 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  30                                 "Logging specific to the SURF network module");
  31
  32 surf_model_t surf_network_model = NULL;
  33 static lmm_system_t network_maxmin_system = NULL;
  34 static void (*network_solve) (lmm_system_t) = NULL;
  35
  36 xbt_dynar_t smpi_bw_factor = NULL;
  37 xbt_dynar_t smpi_lat_factor = NULL;
  38
  39 typedef struct s_smpi_factor *smpi_factor_t;
  40 typedef struct s_smpi_factor {
  41         long factor;
  42         double value;
  43 } s_smpi_factor_t;
  44
  45 double sg_sender_gap = 0.0;
  46 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  47 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  48 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  49
  50 double sg_tcp_gamma = 0.0;
  51 int sg_network_crosstraffic = 0;
  52
  53 xbt_dict_t gap_lookup = NULL;
  54
  55 e_UM_t network_update_mechanism = UM_UNDEFINED;
  56 static int net_selective_update = 0;
  57
  58 static int net_action_is_suspended(surf_action_t action);
  59 static void update_action_remaining(double now);
  60
  61 static xbt_swag_t net_modified_set = NULL;
  62 static xbt_heap_t net_action_heap = NULL;
  63 xbt_swag_t keep_track = NULL;
  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 /*   SMPI callbacks   */
 111 /**********************/
 112 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 113 {
 114         char *value = NULL;
 115         unsigned int iter = 0;
 116         s_smpi_factor_t fact;
 117         xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 118
 119         smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 120         radical_elements = xbt_str_split(smpi_coef_string, ";");
 121         xbt_dynar_foreach(radical_elements, iter, value) {
 122
 123                 radical_elements2 = xbt_str_split(value, ":");
 124                 if(xbt_dynar_length(radical_elements2) != 2)
 125                         xbt_die("Malformed radical for smpi factor!");
 126                 fact.factor = atol(xbt_dynar_get_as(radical_elements2,0,char*));
 127                 fact.value = atof(xbt_dynar_get_as(radical_elements2,1,char*));
 128                 xbt_dynar_push_as(smpi_factor,s_smpi_factor_t,fact);
 129                 XBT_DEBUG("smpi_factor:\t%ld : %f",fact.factor,fact.value);
 130                 xbt_dynar_free(&radical_elements2);
 131         }
 132         xbt_dynar_free(&radical_elements);
 133         return smpi_factor;
 134 }
 135
 136 static double smpi_bandwidth_factor(double size)
 137 {
 138         if(!smpi_bw_factor)
 139                 smpi_bw_factor = parse_factor( xbt_cfg_get_string(_surf_cfg_set,"smpi/bw_factor") );
 140
 141         unsigned int iter = 0;
 142         s_smpi_factor_t fact;
 143         xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 144                 if(size >= fact.factor){
 145                         XBT_DEBUG("%lf >= %ld return %f",size,fact.factor,fact.value);
 146                         return fact.value;
 147                 }
 148         }
 149
 150     return 1.0;
 151 }
 152
 153 static double smpi_latency_factor(double size)
 154 {
 155         if(!smpi_lat_factor)
 156                 smpi_lat_factor = parse_factor( xbt_cfg_get_string(_surf_cfg_set,"smpi/lat_factor") );
 157
 158         unsigned int iter = 0;
 159         s_smpi_factor_t fact;
 160         xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 161                 if(size >= fact.factor){
 162                         XBT_DEBUG("%lf >= %ld return %f",size,fact.factor,fact.value);
 163                         return fact.value;
 164                 }
 165         }
 166
 167     return 1.0;
 168 }
 169 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 170
 171 static double smpi_bandwidth_constraint(double rate, double bound,
 172                                         double size)
 173 {
 174   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 175 }
 176
 177 static double (*latency_factor_callback) (double) =
 178     &constant_latency_factor;
 179 static double (*bandwidth_factor_callback) (double) =
 180     &constant_bandwidth_factor;
 181 static double (*bandwidth_constraint_callback) (double, double, double) =
 182     &constant_bandwidth_constraint;
 183
 184 static void (*gap_append) (double, const link_CM02_t, surf_action_network_CM02_t) = NULL;
 185 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 186
 187 static void* net_create_resource(const char *name,
 188                                 double bw_initial,
 189                                 tmgr_trace_t bw_trace,
 190                                 double lat_initial,
 191                                 tmgr_trace_t lat_trace,
 192                                 e_surf_resource_state_t
 193                                 state_initial,
 194                                 tmgr_trace_t state_trace,
 195                                 e_surf_link_sharing_policy_t
 196                                 policy, xbt_dict_t properties)
 197 {
 198   link_CM02_t nw_link = (link_CM02_t)
 199       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 200                             surf_network_model, name, properties,
 201                             network_maxmin_system,
 202                             sg_bandwidth_factor * bw_initial,
 203                             history,
 204                             state_initial, state_trace,
 205                             bw_initial, bw_trace);
 206
 207   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 208               "Link '%s' declared several times in the platform file.",
 209               name);
 210
 211   nw_link->lat_current = lat_initial;
 212   if (lat_trace)
 213     nw_link->lat_event =
 214         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 215
 216   if (policy == SURF_LINK_FATPIPE)
 217     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 218
 219   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 220
 221   return nw_link;
 222 }
 223
 224 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 225 {
 226   if(link->policy == SURF_LINK_FULLDUPLEX){
 227     char *link_id;
 228     link_id = bprintf("%s_UP", link->id);
 229           net_create_resource(link_id,
 230                            link->bandwidth,
 231                            link->bandwidth_trace,
 232                            link->latency,
 233                            link->latency_trace,
 234                            link->state,
 235                            link->state_trace,
 236                            link->policy,
 237                            link->properties);
 238           xbt_free(link_id);
 239     link_id = bprintf("%s_DOWN", link->id);
 240     net_create_resource(link_id,
 241                         link->bandwidth,
 242                         link->bandwidth_trace,
 243                         link->latency,
 244                         link->latency_trace,
 245                         link->state,
 246                         link->state_trace,
 247                         link->policy,
 248                         link->properties);
 249     xbt_free(link_id);
 250   }
 251   else{
 252     net_create_resource(link->id,
 253                         link->bandwidth,
 254                         link->bandwidth_trace,
 255                         link->latency,
 256                         link->latency_trace,
 257                         link->state,
 258                         link->state_trace,
 259                         link->policy,
 260                         link->properties);
 261   }
 262 }
 263
 264 static void net_add_traces(void)
 265 {
 266   xbt_dict_cursor_t cursor = NULL;
 267   char *trace_name, *elm;
 268
 269   static int called = 0;
 270   if (called)
 271     return;
 272   called = 1;
 273
 274   /* connect all traces relative to network */
 275   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 276     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 277     link_CM02_t link =
 278                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 279
 280     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 281                 trace_name, elm);
 282     xbt_assert(trace,
 283                 "Cannot connect trace %s to link %s: trace undefined",
 284                 trace_name, elm);
 285
 286     link->lmm_resource.state_event =
 287         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 288   }
 289
 290   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 291     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 292     link_CM02_t link =
 293                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 294
 295     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 296                 trace_name, elm);
 297     xbt_assert(trace,
 298                 "Cannot connect trace %s to link %s: trace undefined",
 299                 trace_name, elm);
 300
 301     link->lmm_resource.power.event =
 302         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 303   }
 304
 305   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 306     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 307     link_CM02_t link =
 308                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 309
 310     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 311                 trace_name, elm);
 312     xbt_assert(trace,
 313                 "Cannot connect trace %s to link %s: trace undefined",
 314                 trace_name, elm);
 315
 316     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 317   }
 318 }
 319
 320 static void net_define_callbacks(void)
 321 {
 322   /* Figuring out the network links */
 323   sg_platf_link_add_cb(net_parse_link_init);
 324   sg_platf_postparse_add_cb(net_add_traces);
 325 }
 326
 327 static int net_resource_used(void *resource_id)
 328 {
 329   return lmm_constraint_used(network_maxmin_system,
 330                              ((surf_resource_lmm_t)
 331                               resource_id)->constraint);
 332 }
 333
 334 static int net_action_unref(surf_action_t action)
 335 {
 336   action->refcount--;
 337   if (!action->refcount) {
 338     xbt_swag_remove(action, action->state_set);
 339     if (((surf_action_network_CM02_t) action)->variable){
 340       lmm_variable_free(network_maxmin_system,
 341                         ((surf_action_network_CM02_t) action)->variable);
 342     }
 343     if(network_update_mechanism == UM_LAZY){// remove action from the heap
 344       heap_remove((surf_action_network_CM02_t) action);
 345       xbt_swag_remove(action, net_modified_set);
 346     }
 347 #ifdef HAVE_TRACING
 348     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 349     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 350     xbt_free(action->category);
 351 #endif
 352     surf_action_free(&action);
 353     return 1;
 354   }
 355   return 0;
 356 }
 357
 358
 359
 360 static void net_action_cancel(surf_action_t action)
 361 {
 362         XBT_DEBUG("cancel action %p",action);
 363   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 364   if(network_update_mechanism == UM_LAZY){// remove action from the heap
 365     xbt_swag_remove(action, net_modified_set);
 366     heap_remove((surf_action_network_CM02_t) action);
 367   }
 368 }
 369
 370 void net_action_recycle(surf_action_t action)
 371 {
 372   return;
 373 }
 374
 375 #ifdef HAVE_LATENCY_BOUND_TRACKING
 376 int net_get_link_latency_limited(surf_action_t action)
 377 {
 378   return action->latency_limited;
 379 }
 380 #endif
 381
 382 double net_action_get_remains(surf_action_t action)
 383 {
 384   if(network_update_mechanism == UM_LAZY)/* update remains before return it */
 385     update_action_remaining(surf_get_clock());
 386   return action->remains;
 387 }
 388
 389 static void update_action_remaining(double now){
 390   surf_action_network_CM02_t action = NULL;
 391   double delta = 0.0;
 392
 393   xbt_swag_foreach(action, net_modified_set) {
 394
 395     if(action->suspended != 0){
 396         continue;
 397     }
 398
 399     delta = now - action->last_update;
 400
 401     double_update(&(action->generic_action.remains),
 402                   lmm_variable_getvalue(action->variable) * delta);
 403
 404     if (action->generic_action.max_duration != NO_MAX_DURATION)
 405       double_update(&(action->generic_action.max_duration), delta);
 406
 407     if ((action->generic_action.remains <= 0) &&
 408         (lmm_get_variable_weight(action->variable) > 0)) {
 409       action->generic_action.finish = surf_get_clock();
 410       surf_network_model->action_state_set((surf_action_t) action,
 411                                            SURF_ACTION_DONE);
 412       heap_remove(action);
 413     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 414                && (action->generic_action.max_duration <= 0)) {
 415       action->generic_action.finish = surf_get_clock();
 416       surf_network_model->action_state_set((surf_action_t) action,
 417                                            SURF_ACTION_DONE);
 418       heap_remove(action);
 419     }
 420
 421     action->last_update = now;
 422   }
 423 }
 424
 425 static double net_share_resources_full(double now)
 426 {
 427   s_surf_action_network_CM02_t s_action;
 428   surf_action_network_CM02_t action = NULL;
 429   xbt_swag_t running_actions =
 430       surf_network_model->states.running_action_set;
 431   double min;
 432
 433   min = generic_maxmin_share_resources(running_actions,
 434                                        xbt_swag_offset(s_action,
 435                                                        variable),
 436                                        network_maxmin_system,
 437                                        network_solve);
 438
 439 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 440
 441   xbt_swag_foreach(action, running_actions) {
 442 #ifdef HAVE_LATENCY_BOUND_TRACKING
 443     if (lmm_is_variable_limited_by_latency(action->variable)) {
 444       (action->generic_action).latency_limited = 1;
 445     } else {
 446       (action->generic_action).latency_limited = 0;
 447     }
 448 #endif
 449     if (action->latency > 0) {
 450       min = (min<0)?action->latency:min(min,action->latency);
 451     }
 452   }
 453
 454   XBT_DEBUG("Min of share resources %f", min);
 455
 456   return min;
 457 }
 458
 459 static double net_share_resources_lazy(double now)
 460 {
 461   surf_action_network_CM02_t action = NULL;
 462   double min=-1;
 463   double value;
 464
 465   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(net_modified_set));
 466   update_action_remaining(now);
 467
 468   keep_track = net_modified_set;
 469   lmm_solve(network_maxmin_system);
 470   keep_track = NULL;
 471
 472   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(net_modified_set));
 473
 474   xbt_swag_foreach(action, net_modified_set) {
 475     int max_dur_flag = 0;
 476
 477     if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 478       continue;
 479     }
 480
 481     /* bogus priority, skip it */
 482     if (GENERIC_ACTION(action).priority <= 0){
 483       continue;
 484     }
 485
 486     min = -1;
 487     value = lmm_variable_getvalue(action->variable);
 488     if (value > 0) {
 489       if (GENERIC_ACTION(action).remains > 0) {
 490         value = GENERIC_ACTION(action).remains / value;
 491         min = now + value;
 492       } else {
 493         value = 0.0;
 494         min = now;
 495       }
 496     }
 497
 498     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 499         && (min == -1
 500             || GENERIC_ACTION(action).start +
 501             GENERIC_ACTION(action).max_duration < min)){
 502       min =   GENERIC_ACTION(action).start +
 503           GENERIC_ACTION(action).max_duration;
 504       max_dur_flag = 1;
 505     }
 506
 507     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 508         GENERIC_ACTION(action).start, now + value,
 509         GENERIC_ACTION(action).max_duration);
 510
 511     if (action->index_heap >= 0) {
 512       heap_remove((surf_action_network_CM02_t) action);
 513     }
 514
 515     if (min != -1) {
 516       heap_insert((surf_action_network_CM02_t) action, min, max_dur_flag?MAX_DURATION:NORMAL);
 517       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 518     }
 519   }
 520
 521   //hereafter must have already the min value for this resource model
 522   if(xbt_heap_size(net_action_heap) > 0 ){
 523     min = xbt_heap_maxkey(net_action_heap) - now ;
 524   }else{
 525     min = -1;
 526   }
 527
 528   XBT_DEBUG("The minimum with the HEAP %lf", min);
 529
 530   return min;
 531 }
 532
 533 static void net_update_actions_state_full(double now, double delta)
 534 {
 535   double deltap = 0.0;
 536   surf_action_network_CM02_t action = NULL;
 537   surf_action_network_CM02_t next_action = NULL;
 538   xbt_swag_t running_actions =
 539       surf_network_model->states.running_action_set;
 540   /*
 541      xbt_swag_t failed_actions =
 542      surf_network_model->states.failed_action_set;
 543    */
 544
 545   xbt_swag_foreach_safe(action, next_action, running_actions) {
 546     deltap = delta;
 547     if (action->latency > 0) {
 548       if (action->latency > deltap) {
 549         double_update(&(action->latency), deltap);
 550         deltap = 0.0;
 551       } else {
 552         double_update(&(deltap), action->latency);
 553         action->latency = 0.0;
 554       }
 555       if ((action->latency == 0.0) && !(action->suspended))
 556         lmm_update_variable_weight(network_maxmin_system, action->variable,
 557                                    action->weight);
 558     }
 559 #ifdef HAVE_TRACING
 560     if (TRACE_is_enabled()) {
 561       xbt_dynar_t route=NULL;
 562       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 563       link_CM02_t link;
 564       unsigned int i;
 565       xbt_dynar_foreach(route, i, link) {
 566         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 567                                         action->generic_action.data,
 568                                         (surf_action_t) action,
 569                                         lmm_variable_getvalue
 570                                         (action->variable), now - delta,
 571                                         delta);
 572       }
 573     }
 574 #endif
 575     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 576         /* There is actually no link used, hence an infinite bandwidth.
 577          * This happens often when using models like vivaldi.
 578          * In such case, just make sure that the action completes immediately.
 579          */
 580       double_update(&(action->generic_action.remains),
 581           action->generic_action.remains);
 582     }
 583     double_update(&(action->generic_action.remains),
 584                   lmm_variable_getvalue(action->variable) * deltap);
 585     if (action->generic_action.max_duration != NO_MAX_DURATION)
 586       double_update(&(action->generic_action.max_duration), delta);
 587
 588     if ((action->generic_action.remains <= 0) &&
 589         (lmm_get_variable_weight(action->variable) > 0)) {
 590       action->generic_action.finish = surf_get_clock();
 591       surf_network_model->action_state_set((surf_action_t) action,
 592                                            SURF_ACTION_DONE);
 593
 594       if(gap_remove) gap_remove(action);
 595     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 596                && (action->generic_action.max_duration <= 0)) {
 597       action->generic_action.finish = surf_get_clock();
 598       surf_network_model->action_state_set((surf_action_t) action,
 599                                            SURF_ACTION_DONE);
 600       if(gap_remove) gap_remove(action);
 601     }
 602   }
 603
 604   return;
 605 }
 606
 607 static void net_update_actions_state_lazy(double now, double delta)
 608 {
 609   surf_action_network_CM02_t action = NULL;
 610
 611   while ((xbt_heap_size(net_action_heap) > 0)
 612          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 613     action = xbt_heap_pop(net_action_heap);
 614     XBT_DEBUG("Action %p: finish", action);
 615     GENERIC_ACTION(action).finish = surf_get_clock();
 616
 617     // if I am wearing a latency hat
 618     if( action->hat ==  LATENCY){
 619         lmm_update_variable_weight(network_maxmin_system, action->variable,
 620                                            action->weight);
 621         heap_remove(action);
 622         action->last_update = surf_get_clock();
 623
 624     // if I am wearing a max_duration or normal hat
 625     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 626         // no need to communicate anymore
 627         // assume that flows that reached max_duration have remaining of 0
 628         GENERIC_ACTION(action).remains = 0;
 629         action->generic_action.finish = surf_get_clock();
 630               surf_network_model->action_state_set((surf_action_t) action,
 631                                                    SURF_ACTION_DONE);
 632         heap_remove(action);
 633     }
 634   }
 635   return;
 636 }
 637
 638 static void net_update_resource_state(void *id,
 639                                       tmgr_trace_event_t event_type,
 640                                       double value, double date)
 641 {
 642   link_CM02_t nw_link = id;
 643   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 644   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 645   /*     value, event_type); */
 646
 647   if (event_type == nw_link->lmm_resource.power.event) {
 648     double delta =
 649         sg_weight_S_parameter / value - sg_weight_S_parameter /
 650         (nw_link->lmm_resource.power.peak *
 651          nw_link->lmm_resource.power.scale);
 652     lmm_variable_t var = NULL;
 653     lmm_element_t elem = NULL;
 654     surf_action_network_CM02_t action = NULL;
 655
 656     nw_link->lmm_resource.power.peak = value;
 657     lmm_update_constraint_bound(network_maxmin_system,
 658                                 nw_link->lmm_resource.constraint,
 659                                 sg_bandwidth_factor *
 660                                 (nw_link->lmm_resource.power.peak *
 661                                  nw_link->lmm_resource.power.scale));
 662 #ifdef HAVE_TRACING
 663     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 664                                   sg_bandwidth_factor *
 665                                   (nw_link->lmm_resource.power.peak *
 666                                    nw_link->lmm_resource.power.scale));
 667 #endif
 668     if (sg_weight_S_parameter > 0) {
 669       while ((var = lmm_get_var_from_cnst
 670               (network_maxmin_system, nw_link->lmm_resource.constraint,
 671                &elem))) {
 672         action = lmm_variable_id(var);
 673         action->weight += delta;
 674         if (!(action->suspended))
 675           lmm_update_variable_weight(network_maxmin_system,
 676                                      action->variable, action->weight);
 677       }
 678     }
 679     if (tmgr_trace_event_free(event_type))
 680       nw_link->lmm_resource.power.event = NULL;
 681   } else if (event_type == nw_link->lat_event) {
 682     double delta = value - nw_link->lat_current;
 683     lmm_variable_t var = NULL;
 684     lmm_element_t elem = NULL;
 685     surf_action_network_CM02_t action = NULL;
 686
 687     nw_link->lat_current = value;
 688     while ((var = lmm_get_var_from_cnst
 689             (network_maxmin_system, nw_link->lmm_resource.constraint,
 690              &elem))) {
 691       action = lmm_variable_id(var);
 692       action->lat_current += delta;
 693       action->weight += delta;
 694       if (action->rate < 0)
 695         lmm_update_variable_bound(network_maxmin_system, action->variable,
 696                                   sg_tcp_gamma / (2.0 *
 697                                                   action->lat_current));
 698       else {
 699         lmm_update_variable_bound(network_maxmin_system, action->variable,
 700                                   min(action->rate,
 701                                       sg_tcp_gamma / (2.0 *
 702                                                       action->lat_current)));
 703
 704         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 705           XBT_INFO("Flow is limited BYBANDWIDTH");
 706         } else {
 707           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 708                 action->lat_current);
 709         }
 710       }
 711       if (!(action->suspended))
 712         lmm_update_variable_weight(network_maxmin_system, action->variable,
 713                                    action->weight);
 714
 715     }
 716     if (tmgr_trace_event_free(event_type))
 717       nw_link->lat_event = NULL;
 718   } else if (event_type == nw_link->lmm_resource.state_event) {
 719     if (value > 0)
 720       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 721     else {
 722       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 723       lmm_variable_t var = NULL;
 724       lmm_element_t elem = NULL;
 725
 726       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 727       while ((var = lmm_get_var_from_cnst
 728               (network_maxmin_system, cnst, &elem))) {
 729         surf_action_t action = lmm_variable_id(var);
 730
 731         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 732             surf_action_state_get(action) == SURF_ACTION_READY) {
 733           action->finish = date;
 734           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 735         }
 736       }
 737     }
 738     if (tmgr_trace_event_free(event_type))
 739       nw_link->lmm_resource.state_event = NULL;
 740   } else {
 741     XBT_CRITICAL("Unknown event ! \n");
 742     xbt_abort();
 743   }
 744
 745   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 746   return;
 747 }
 748
 749
 750 static surf_action_t net_communicate(const char *src_name,
 751                                      const char *dst_name, double size,
 752                                      double rate)
 753 {
 754   unsigned int i;
 755   link_CM02_t link;
 756   int failed = 0;
 757   surf_action_network_CM02_t action = NULL;
 758   double bandwidth_bound;
 759   double latency=0.0;
 760   xbt_dynar_t back_route = NULL;
 761   int constraints_per_variable = 0;
 762
 763   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 764
 765   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 766
 767   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 768   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 769               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 770               src_name, dst_name);
 771
 772   xbt_dynar_foreach(route, i, link) {
 773     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 774       failed = 1;
 775       break;
 776     }
 777   }
 778   if (sg_network_crosstraffic == 1) {
 779     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 780     xbt_dynar_foreach(back_route, i, link) {
 781       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 782         failed = 1;
 783         break;
 784       }
 785     }
 786   }
 787
 788   action =
 789       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 790                       surf_network_model, failed);
 791 #ifdef HAVE_LATENCY_BOUND_TRACKING
 792   (action->generic_action).latency_limited = 0;
 793 #endif
 794   action->weight = action->latency = latency;
 795
 796   xbt_swag_insert(action, action->generic_action.state_set);
 797   action->rate = rate;
 798   if(network_update_mechanism == UM_LAZY){
 799     action->index_heap = -1;
 800     action->last_update = surf_get_clock();
 801   }
 802
 803   bandwidth_bound = -1.0;
 804   if(sg_weight_S_parameter>0) {
 805     xbt_dynar_foreach(route, i, link) {
 806       action->weight +=
 807           sg_weight_S_parameter /
 808           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 809     }
 810   }
 811   xbt_dynar_foreach(route, i, link) {
 812     double bb = bandwidth_factor_callback(size) *
 813         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 814     bandwidth_bound = (bandwidth_bound < 0.0)?bb:min(bandwidth_bound,bb);
 815   }
 816
 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   if(gap_append) {
 823     xbt_assert(!xbt_dynar_is_empty(route),"Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 824
 825     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 826     gap_append(size, link, action);
 827     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 828            action, src_name, dst_name, action->sender.gap, action->latency);
 829   }
 830
 831   constraints_per_variable = xbt_dynar_length(route);
 832   if (back_route != NULL)
 833     constraints_per_variable += xbt_dynar_length(back_route);
 834
 835   if (action->latency > 0){
 836       action->variable =
 837         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 838                          constraints_per_variable);
 839     if(network_update_mechanism == UM_LAZY){
 840       // add to the heap the event when the latency is payed
 841       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 842       heap_insert(action, action->latency + action->last_update, xbt_dynar_is_empty(route)?NORMAL:LATENCY);
 843     }
 844   } else
 845     action->variable =
 846         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 847                          constraints_per_variable);
 848
 849   if (action->rate < 0) {
 850     lmm_update_variable_bound(network_maxmin_system, action->variable,
 851         (action->lat_current > 0)?
 852             sg_tcp_gamma / (2.0 * action->lat_current)  :-1.0);
 853   } else {
 854     lmm_update_variable_bound(network_maxmin_system, action->variable,
 855         (action->lat_current > 0)?
 856             min(action->rate, sg_tcp_gamma / (2.0 * action->lat_current))
 857             :action->rate);
 858   }
 859
 860   xbt_dynar_foreach(route, i, link) {
 861     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 862                action->variable, 1.0);
 863   }
 864
 865   if (sg_network_crosstraffic == 1) {
 866     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 867     xbt_dynar_foreach(back_route, i, link) {
 868       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 869                  action->variable, .05);
 870     }
 871   }
 872
 873 #ifdef HAVE_TRACING
 874   if (TRACE_is_enabled()) {
 875     action->src_name = xbt_strdup(src_name);
 876     action->dst_name = xbt_strdup(dst_name);
 877   } else {
 878     action->src_name = action->dst_name = NULL;
 879   }
 880 #endif
 881
 882   xbt_dynar_free(&route);
 883   XBT_OUT();
 884
 885   return (surf_action_t) action;
 886 }
 887
 888 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 889 {
 890   xbt_dynar_t route=NULL;
 891   routing_get_route_and_latency(src, dst,&route,NULL);
 892   return route;
 893 }
 894
 895 static double net_get_link_bandwidth(const void *link)
 896 {
 897   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 898   return lmm->power.peak * lmm->power.scale;
 899 }
 900
 901 static double net_get_link_latency(const void *link)
 902 {
 903   return ((link_CM02_t) link)->lat_current;
 904 }
 905
 906 static int net_link_shared(const void *link)
 907 {
 908   return
 909       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 910 }
 911
 912 static void net_action_suspend(surf_action_t action)
 913 {
 914   ((surf_action_network_CM02_t) action)->suspended = 1;
 915   lmm_update_variable_weight(network_maxmin_system,
 916                              ((surf_action_network_CM02_t)
 917                               action)->variable, 0.0);
 918
 919   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 920     heap_remove((surf_action_network_CM02_t) action);
 921 }
 922
 923 static void net_action_resume(surf_action_t action)
 924 {
 925   if (((surf_action_network_CM02_t) action)->suspended) {
 926     lmm_update_variable_weight(network_maxmin_system,
 927                                ((surf_action_network_CM02_t)
 928                                 action)->variable,
 929                                ((surf_action_network_CM02_t)
 930                                 action)->weight);
 931     ((surf_action_network_CM02_t) action)->suspended = 0;
 932     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 933       heap_remove((surf_action_network_CM02_t) action);
 934   }
 935 }
 936
 937 static int net_action_is_suspended(surf_action_t action)
 938 {
 939   return ((surf_action_network_CM02_t) action)->suspended;
 940 }
 941
 942 void net_action_set_max_duration(surf_action_t action, double duration)
 943 {
 944   action->max_duration = duration;
 945   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 946     heap_remove((surf_action_network_CM02_t) action);
 947 }
 948
 949 #ifdef HAVE_TRACING
 950 static void net_action_set_category(surf_action_t action, const char *category)
 951 {
 952   action->category = xbt_strdup (category);
 953 }
 954 #endif
 955
 956 static void net_finalize(void)
 957 {
 958   surf_model_exit(surf_network_model);
 959   surf_network_model = NULL;
 960
 961   lmm_system_free(network_maxmin_system);
 962   network_maxmin_system = NULL;
 963
 964   if(network_update_mechanism == UM_LAZY){
 965     xbt_heap_free(net_action_heap);
 966     xbt_swag_free(net_modified_set);
 967   }
 968
 969   if(smpi_bw_factor)
 970           xbt_dynar_free(&smpi_bw_factor);
 971   if(smpi_lat_factor)
 972           xbt_dynar_free(&smpi_lat_factor);
 973 }
 974
 975 static void smpi_gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
 976    const char* src = link->lmm_resource.generic_resource.name;
 977    xbt_fifo_t fifo;
 978    surf_action_network_CM02_t last_action;
 979    double bw;
 980
 981    if(sg_sender_gap > 0.0) {
 982       if(!gap_lookup) {
 983          gap_lookup = xbt_dict_new();
 984       }
 985       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
 986       action->sender.gap = 0.0;
 987       if(fifo && xbt_fifo_size(fifo) > 0) {
 988          /* Compute gap from last send */
 989          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 990          bw = net_get_link_bandwidth(link);
 991          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
 992          action->latency += action->sender.gap;
 993       }
 994       /* Append action as last send */
 995       action->sender.link_name = link->lmm_resource.generic_resource.name;
 996       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
 997       if(!fifo) {
 998          fifo = xbt_fifo_new();
 999          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1000       }
1001       action->sender.fifo_item = xbt_fifo_push(fifo, action);
1002       action->sender.size = size;
1003    }
1004 }
1005
1006 static void smpi_gap_remove(surf_action_network_CM02_t action) {
1007    xbt_fifo_t fifo;
1008    size_t size;
1009
1010    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1011       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1012       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1013       size = xbt_fifo_size(fifo);
1014       if(size == 0) {
1015          xbt_fifo_free(fifo);
1016          xbt_dict_remove(gap_lookup, action->sender.link_name);
1017          size = xbt_dict_length(gap_lookup);
1018          if(size == 0) {
1019             xbt_dict_free(&gap_lookup);
1020          }
1021       }
1022    }
1023 }
1024
1025 static void surf_network_model_init_internal(void)
1026 {
1027   s_surf_action_network_CM02_t comm;
1028   surf_network_model = surf_model_init();
1029
1030   surf_network_model->name = "network";
1031   surf_network_model->action_unref = net_action_unref;
1032   surf_network_model->action_cancel = net_action_cancel;
1033   surf_network_model->action_recycle = net_action_recycle;
1034   surf_network_model->get_remains = net_action_get_remains;
1035 #ifdef HAVE_LATENCY_BOUND_TRACKING
1036   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1037 #endif
1038 #ifdef HAVE_TRACING
1039   surf_network_model->set_category = net_action_set_category;
1040 #endif
1041
1042   surf_network_model->model_private->resource_used = net_resource_used;
1043   if(network_update_mechanism == UM_LAZY) {
1044     surf_network_model->model_private->share_resources = net_share_resources_lazy;
1045     surf_network_model->model_private->update_actions_state = net_update_actions_state_lazy;
1046   } else if(network_update_mechanism == UM_FULL) {
1047     surf_network_model->model_private->share_resources = net_share_resources_full;
1048     surf_network_model->model_private->update_actions_state = net_update_actions_state_full;
1049   }
1050
1051   surf_network_model->model_private->update_resource_state =
1052                   net_update_resource_state;
1053   surf_network_model->model_private->finalize = net_finalize;
1054
1055   surf_network_model->suspend = net_action_suspend;
1056   surf_network_model->resume = net_action_resume;
1057   surf_network_model->is_suspended = net_action_is_suspended;
1058   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1059
1060   surf_network_model->extension.network.communicate = net_communicate;
1061   surf_network_model->extension.network.get_route = net_get_route;
1062   surf_network_model->extension.network.get_link_bandwidth =
1063                   net_get_link_bandwidth;
1064   surf_network_model->extension.network.get_link_latency =
1065                   net_get_link_latency;
1066   surf_network_model->extension.network.link_shared = net_link_shared;
1067   surf_network_model->extension.network.add_traces = net_add_traces;
1068   surf_network_model->extension.network.create_resource =
1069                   net_create_resource;
1070
1071  if (!network_maxmin_system)
1072     network_maxmin_system = lmm_system_new(net_selective_update);
1073
1074  routing_model_create(sizeof(link_CM02_t),
1075       net_create_resource("__loopback__",
1076           498000000, NULL, 0.000015, NULL,
1077           SURF_RESOURCE_ON, NULL,
1078           SURF_LINK_FATPIPE, NULL));
1079
1080   if(network_update_mechanism == UM_LAZY){
1081     net_action_heap = xbt_heap_new(8,NULL);
1082     xbt_heap_set_update_callback(net_action_heap, net_action_update_index_heap);
1083     net_modified_set =
1084         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1085   }
1086 }
1087
1088 static void set_update_mechanism(void) {
1089 #ifdef HAVE_TRACING
1090   TRACE_set_network_update_mechanism ();
1091 #endif
1092
1093   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1094   int select = xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1095
1096   if(!strcmp(optim,"Full")) {
1097     network_update_mechanism = UM_FULL;
1098     net_selective_update = select;
1099   } else if (!strcmp(optim,"Lazy")) {
1100     network_update_mechanism = UM_LAZY;
1101     net_selective_update = 1;
1102     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"network/maxmin_selective_update")),
1103         "Disabling selective update while using the lazy update mechanism is dumb!");
1104   } else {
1105     xbt_die("Unsupported optimization (%s) for this model",optim);
1106   }
1107 }
1108
1109 /************************************************************************/
1110 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1111 /************************************************************************/
1112 /* @Inproceedings{smpi_ipdps, */
1113 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1114 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1115 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1116 /*  address={Anchorage (Alaska) USA}, */
1117 /*  month=may, */
1118 /*  year={2011} */
1119 /*  } */
1120 void surf_network_model_init_SMPI(void)
1121 {
1122
1123   if (surf_network_model)
1124     return;
1125   set_update_mechanism();
1126
1127   surf_network_model_init_internal();
1128   latency_factor_callback = &smpi_latency_factor;
1129   bandwidth_factor_callback = &smpi_bandwidth_factor;
1130   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1131   gap_append = &smpi_gap_append;
1132   gap_remove = &smpi_gap_remove;
1133   net_define_callbacks();
1134   xbt_dynar_push(model_list, &surf_network_model);
1135   network_solve = lmm_solve;
1136
1137   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1138   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1139 }
1140
1141 /************************************************************************/
1142 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1143 /************************************************************************/
1144 /* @techreport{VELHO:2011:HAL-00646896:1, */
1145 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1146 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1147 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1148 /*      type = {Rapport de recherche}, */
1149 /*      institution = {INRIA}, */
1150 /*      number = {RR-7821}, */
1151 /*      year = {2011}, */
1152 /*      month = Nov, */
1153 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1154 /*  } */
1155 void surf_network_model_init_LegrandVelho(void)
1156 {
1157   if (surf_network_model)
1158     return;
1159
1160   set_update_mechanism();
1161
1162   surf_network_model_init_internal();
1163   net_define_callbacks();
1164   xbt_dynar_push(model_list, &surf_network_model);
1165   network_solve = lmm_solve;
1166
1167   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 13.01);
1168   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.97);
1169   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1170 }
1171
1172 /***************************************************************************/
1173 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1174 /***************************************************************************/
1175 /* @TechReport{      rr-lip2002-40, */
1176 /*   author        = {Henri Casanova and Loris Marchal}, */
1177 /*   institution   = {LIP}, */
1178 /*   title         = {A Network Model for Simulation of Grid Application}, */
1179 /*   number        = {2002-40}, */
1180 /*   month         = {oct}, */
1181 /*   year          = {2002} */
1182 /* } */
1183 void surf_network_model_init_CM02(void)
1184 {
1185
1186   if (surf_network_model)
1187     return;
1188
1189   set_update_mechanism();
1190   surf_network_model_init_internal();
1191   net_define_callbacks();
1192   xbt_dynar_push(model_list, &surf_network_model);
1193   network_solve = lmm_solve;
1194
1195   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1196   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1197   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1198 }
1199
1200 /***************************************************************************/
1201 /* The models from Steven H. Low                                           */
1202 /***************************************************************************/
1203 /* @article{Low03,                                                         */
1204 /*   author={Steven H. Low},                                               */
1205 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1206 /*   year={2003},                                                          */
1207 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1208 /*    volume={11}, number={4},                                             */
1209 /*  }                                                                      */
1210 void surf_network_model_init_Reno(void)
1211 {
1212   if (surf_network_model)
1213     return;
1214
1215   set_update_mechanism();
1216   surf_network_model_init_internal();
1217   net_define_callbacks();
1218
1219   xbt_dynar_push(model_list, &surf_network_model);
1220   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1221                                     func_reno_fpi);
1222   network_solve = lagrange_solve;
1223
1224   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1225   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1226                             0.92);
1227   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1228 }
1229
1230
1231 void surf_network_model_init_Reno2(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_reno2_f, func_reno2_fp,
1242                                     func_reno2_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_parameter",
1249                             8775);
1250 }
1251
1252 void surf_network_model_init_Vegas(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_vegas_f, func_vegas_fp,
1263                                     func_vegas_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", 8775);
1270 }