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
  64 /* added to manage the communication action's heap */
  65 static void net_action_update_index_heap(void *action, int i)
  66 {
  67   ((surf_action_network_CM02_t) action)->index_heap = i;
  68 }
  69
  70 /* insert action on heap using a given key and a hat (heap_action_type)
  71  * a hat can be of three types for communications:
  72  *
  73  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  74  * LATENCY = this is a heap entry to warn us when the latency is payed
  75  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  76  */
  77 static void heap_insert(surf_action_network_CM02_t    action, double key, enum heap_action_type hat){
  78   action->hat = hat;
  79   xbt_heap_push(net_action_heap, action, key);
  80 }
  81
  82 static void heap_remove(surf_action_network_CM02_t action){
  83   action->hat = NOTSET;
  84   if(((surf_action_network_CM02_t) action)->index_heap >= 0){
  85       xbt_heap_remove(net_action_heap,action->index_heap);
  86   }
  87 }
  88
  89 /******************************************************************************/
  90 /*                           Factors callbacks                                */
  91 /******************************************************************************/
  92 static double constant_latency_factor(double size)
  93 {
  94   return sg_latency_factor;
  95 }
  96
  97 static double constant_bandwidth_factor(double size)
  98 {
  99   return sg_bandwidth_factor;
 100 }
 101
 102 static double constant_bandwidth_constraint(double rate, double bound,
 103                                             double size)
 104 {
 105   return rate;
 106 }
 107
 108 /**********************/
 109 /*   SMPI callbacks   */
 110 /**********************/
 111 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 112 {
 113         char *value = NULL;
 114         unsigned int iter = 0;
 115         s_smpi_factor_t fact;
 116         xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 117
 118         smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 119         radical_elements = xbt_str_split(smpi_coef_string, ";");
 120         xbt_dynar_foreach(radical_elements, iter, value) {
 121
 122                 radical_elements2 = xbt_str_split(value, ":");
 123                 if(xbt_dynar_length(radical_elements2) != 2)
 124                         xbt_die("Malformed radical for smpi factor!");
 125                 fact.factor = atol(xbt_dynar_get_as(radical_elements2,0,char*));
 126                 fact.value = atof(xbt_dynar_get_as(radical_elements2,1,char*));
 127                 xbt_dynar_push_as(smpi_factor,s_smpi_factor_t,fact);
 128                 XBT_DEBUG("smpi_factor:\t%ld : %f",fact.factor,fact.value);
 129                 xbt_dynar_free(&radical_elements2);
 130         }
 131         xbt_dynar_free(&radical_elements);
 132         return smpi_factor;
 133 }
 134
 135 static double smpi_bandwidth_factor(double size)
 136 {
 137         if(!smpi_bw_factor)
 138                 smpi_bw_factor = parse_factor( xbt_cfg_get_string(_surf_cfg_set,"smpi/bw_factor") );
 139
 140         unsigned int iter = 0;
 141         s_smpi_factor_t fact;
 142         xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 143                 if(size >= fact.factor){
 144                         XBT_DEBUG("%lf >= %ld return %f",size,fact.factor,fact.value);
 145                         return fact.value;
 146                 }
 147         }
 148
 149     return 1.0;
 150 }
 151
 152 static double smpi_latency_factor(double size)
 153 {
 154         if(!smpi_lat_factor)
 155                 smpi_lat_factor = parse_factor( xbt_cfg_get_string(_surf_cfg_set,"smpi/lat_factor") );
 156
 157         unsigned int iter = 0;
 158         s_smpi_factor_t fact;
 159         xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 160                 if(size >= fact.factor){
 161                         XBT_DEBUG("%lf >= %ld return %f",size,fact.factor,fact.value);
 162                         return fact.value;
 163                 }
 164         }
 165
 166     return 1.0;
 167 }
 168 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 169
 170 static double smpi_bandwidth_constraint(double rate, double bound,
 171                                         double size)
 172 {
 173   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 174 }
 175
 176 static double (*latency_factor_callback) (double) =
 177     &constant_latency_factor;
 178 static double (*bandwidth_factor_callback) (double) =
 179     &constant_bandwidth_factor;
 180 static double (*bandwidth_constraint_callback) (double, double, double) =
 181     &constant_bandwidth_constraint;
 182
 183 static void (*gap_append) (double, const link_CM02_t, surf_action_network_CM02_t) = NULL;
 184 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 185
 186 static void* net_create_resource(const char *name,
 187                                 double bw_initial,
 188                                 tmgr_trace_t bw_trace,
 189                                 double lat_initial,
 190                                 tmgr_trace_t lat_trace,
 191                                 e_surf_resource_state_t
 192                                 state_initial,
 193                                 tmgr_trace_t state_trace,
 194                                 e_surf_link_sharing_policy_t
 195                                 policy, xbt_dict_t properties)
 196 {
 197   link_CM02_t nw_link = (link_CM02_t)
 198       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 199                             surf_network_model, name, properties,
 200                             network_maxmin_system,
 201                             sg_bandwidth_factor * bw_initial,
 202                             history,
 203                             state_initial, state_trace,
 204                             bw_initial, bw_trace);
 205
 206   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 207               "Link '%s' declared several times in the platform file.",
 208               name);
 209
 210   nw_link->lat_current = lat_initial;
 211   if (lat_trace)
 212     nw_link->lat_event =
 213         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 214
 215   if (policy == SURF_LINK_FATPIPE)
 216     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 217
 218   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 219
 220   return nw_link;
 221 }
 222
 223 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 224 {
 225   if(link->policy == SURF_LINK_FULLDUPLEX){
 226     char *link_id;
 227     link_id = bprintf("%s_UP", link->id);
 228           net_create_resource(link_id,
 229                            link->bandwidth,
 230                            link->bandwidth_trace,
 231                            link->latency,
 232                            link->latency_trace,
 233                            link->state,
 234                            link->state_trace,
 235                            link->policy,
 236                            link->properties);
 237           xbt_free(link_id);
 238     link_id = bprintf("%s_DOWN", link->id);
 239     net_create_resource(link_id,
 240                         link->bandwidth,
 241                         link->bandwidth_trace,
 242                         link->latency,
 243                         link->latency_trace,
 244                         link->state,
 245                         link->state_trace,
 246                         link->policy,
 247                         link->properties);
 248     xbt_free(link_id);
 249   }
 250   else{
 251     net_create_resource(link->id,
 252                         link->bandwidth,
 253                         link->bandwidth_trace,
 254                         link->latency,
 255                         link->latency_trace,
 256                         link->state,
 257                         link->state_trace,
 258                         link->policy,
 259                         link->properties);
 260   }
 261 }
 262
 263 static void net_add_traces(void)
 264 {
 265   xbt_dict_cursor_t cursor = NULL;
 266   char *trace_name, *elm;
 267
 268   static int called = 0;
 269   if (called)
 270     return;
 271   called = 1;
 272
 273   /* connect all traces relative to network */
 274   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 275     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 276     link_CM02_t link =
 277                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 278
 279     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 280                 trace_name, elm);
 281     xbt_assert(trace,
 282                 "Cannot connect trace %s to link %s: trace undefined",
 283                 trace_name, elm);
 284
 285     link->lmm_resource.state_event =
 286         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 287   }
 288
 289   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 290     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 291     link_CM02_t link =
 292                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 293
 294     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 295                 trace_name, elm);
 296     xbt_assert(trace,
 297                 "Cannot connect trace %s to link %s: trace undefined",
 298                 trace_name, elm);
 299
 300     link->lmm_resource.power.event =
 301         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 302   }
 303
 304   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 305     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 306     link_CM02_t link =
 307                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 308
 309     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 310                 trace_name, elm);
 311     xbt_assert(trace,
 312                 "Cannot connect trace %s to link %s: trace undefined",
 313                 trace_name, elm);
 314
 315     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 316   }
 317 }
 318
 319 static void net_define_callbacks(void)
 320 {
 321   /* Figuring out the network links */
 322   sg_platf_link_add_cb(net_parse_link_init);
 323   sg_platf_postparse_add_cb(net_add_traces);
 324 }
 325
 326 static int net_resource_used(void *resource_id)
 327 {
 328   return lmm_constraint_used(network_maxmin_system,
 329                              ((surf_resource_lmm_t)
 330                               resource_id)->constraint);
 331 }
 332
 333 static int net_action_unref(surf_action_t action)
 334 {
 335   action->refcount--;
 336   if (!action->refcount) {
 337     xbt_swag_remove(action, action->state_set);
 338     if (((surf_action_network_CM02_t) action)->variable){
 339       lmm_variable_free(network_maxmin_system,
 340                         ((surf_action_network_CM02_t) action)->variable);
 341     }
 342     if(network_update_mechanism == UM_LAZY){// remove action from the heap
 343       heap_remove((surf_action_network_CM02_t) action);
 344       xbt_swag_remove(action, net_modified_set);
 345     }
 346 #ifdef HAVE_TRACING
 347     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 348     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 349     xbt_free(action->category);
 350 #endif
 351     surf_action_free(&action);
 352     return 1;
 353   }
 354   return 0;
 355 }
 356
 357
 358
 359 static void net_action_cancel(surf_action_t action)
 360 {
 361         XBT_DEBUG("cancel action %p",action);
 362   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 363   if(network_update_mechanism == UM_LAZY){// remove action from the heap
 364     xbt_swag_remove(action, net_modified_set);
 365     heap_remove((surf_action_network_CM02_t) action);
 366   }
 367 }
 368
 369 void net_action_recycle(surf_action_t action)
 370 {
 371   return;
 372 }
 373
 374 #ifdef HAVE_LATENCY_BOUND_TRACKING
 375 int net_get_link_latency_limited(surf_action_t action)
 376 {
 377   return action->latency_limited;
 378 }
 379 #endif
 380
 381 double net_action_get_remains(surf_action_t action)
 382 {
 383   if(network_update_mechanism == UM_LAZY)/* update remains before return it */
 384     update_action_remaining(surf_get_clock());
 385   return action->remains;
 386 }
 387
 388 static void update_action_remaining(double now){
 389   surf_action_network_CM02_t action = NULL;
 390   double delta = 0.0;
 391
 392   xbt_swag_foreach(action, net_modified_set) {
 393
 394     if(action->suspended != 0){
 395         continue;
 396     }
 397
 398     delta = now - action->last_update;
 399
 400     double_update(&(action->generic_action.remains),
 401                   lmm_variable_getvalue(action->variable) * delta);
 402
 403     if (action->generic_action.max_duration != NO_MAX_DURATION)
 404       double_update(&(action->generic_action.max_duration), delta);
 405
 406     if ((action->generic_action.remains <= 0) &&
 407         (lmm_get_variable_weight(action->variable) > 0)) {
 408       action->generic_action.finish = surf_get_clock();
 409       surf_network_model->action_state_set((surf_action_t) action,
 410                                            SURF_ACTION_DONE);
 411       heap_remove(action);
 412     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 413                && (action->generic_action.max_duration <= 0)) {
 414       action->generic_action.finish = surf_get_clock();
 415       surf_network_model->action_state_set((surf_action_t) action,
 416                                            SURF_ACTION_DONE);
 417       heap_remove(action);
 418     }
 419
 420     action->last_update = now;
 421   }
 422 }
 423
 424 static double net_share_resources_full(double now)
 425 {
 426   s_surf_action_network_CM02_t s_action;
 427   surf_action_network_CM02_t action = NULL;
 428   xbt_swag_t running_actions =
 429       surf_network_model->states.running_action_set;
 430   double min;
 431
 432   min = generic_maxmin_share_resources(running_actions,
 433                                        xbt_swag_offset(s_action,
 434                                                        variable),
 435                                        network_maxmin_system,
 436                                        network_solve);
 437
 438 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 439
 440   xbt_swag_foreach(action, running_actions) {
 441 #ifdef HAVE_LATENCY_BOUND_TRACKING
 442     if (lmm_is_variable_limited_by_latency(action->variable)) {
 443       (action->generic_action).latency_limited = 1;
 444     } else {
 445       (action->generic_action).latency_limited = 0;
 446     }
 447 #endif
 448     if (action->latency > 0) {
 449       min = (min<0)?action->latency:min(min,action->latency);
 450     }
 451   }
 452
 453   XBT_DEBUG("Min of share resources %f", min);
 454
 455   return min;
 456 }
 457
 458 static double net_share_resources_lazy(double now)
 459 {
 460   surf_action_network_CM02_t action = NULL;
 461   double min=-1;
 462   double value;
 463
 464   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(net_modified_set));
 465   update_action_remaining(now);
 466
 467   lmm_solve(network_maxmin_system);
 468
 469   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(net_modified_set));
 470
 471   xbt_swag_foreach(action, net_modified_set) {
 472     int max_dur_flag = 0;
 473
 474     if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 475       continue;
 476     }
 477
 478     /* bogus priority, skip it */
 479     if (GENERIC_ACTION(action).priority <= 0){
 480       continue;
 481     }
 482
 483     min = -1;
 484     value = lmm_variable_getvalue(action->variable);
 485     if (value > 0) {
 486       if (GENERIC_ACTION(action).remains > 0) {
 487         value = GENERIC_ACTION(action).remains / value;
 488         min = now + value;
 489       } else {
 490         value = 0.0;
 491         min = now;
 492       }
 493     }
 494
 495     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 496         && (min == -1
 497             || GENERIC_ACTION(action).start +
 498             GENERIC_ACTION(action).max_duration < min)){
 499       min =   GENERIC_ACTION(action).start +
 500           GENERIC_ACTION(action).max_duration;
 501       max_dur_flag = 1;
 502     }
 503
 504     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 505         GENERIC_ACTION(action).start, now + value,
 506         GENERIC_ACTION(action).max_duration);
 507
 508     if (action->index_heap >= 0) {
 509       heap_remove((surf_action_network_CM02_t) action);
 510     }
 511
 512     if (min != -1) {
 513       heap_insert((surf_action_network_CM02_t) action, min, max_dur_flag?MAX_DURATION:NORMAL);
 514       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 515     }
 516   }
 517
 518   //hereafter must have already the min value for this resource model
 519   if(xbt_heap_size(net_action_heap) > 0 ){
 520     min = xbt_heap_maxkey(net_action_heap) - now ;
 521   }else{
 522     min = -1;
 523   }
 524
 525   XBT_DEBUG("The minimum with the HEAP %lf", min);
 526
 527   return min;
 528 }
 529
 530 static void net_update_actions_state_full(double now, double delta)
 531 {
 532   double deltap = 0.0;
 533   surf_action_network_CM02_t action = NULL;
 534   surf_action_network_CM02_t next_action = NULL;
 535   xbt_swag_t running_actions =
 536       surf_network_model->states.running_action_set;
 537   /*
 538      xbt_swag_t failed_actions =
 539      surf_network_model->states.failed_action_set;
 540    */
 541
 542   xbt_swag_foreach_safe(action, next_action, running_actions) {
 543     deltap = delta;
 544     if (action->latency > 0) {
 545       if (action->latency > deltap) {
 546         double_update(&(action->latency), deltap);
 547         deltap = 0.0;
 548       } else {
 549         double_update(&(deltap), action->latency);
 550         action->latency = 0.0;
 551       }
 552       if ((action->latency == 0.0) && !(action->suspended))
 553         lmm_update_variable_weight(network_maxmin_system, action->variable,
 554                                    action->weight);
 555     }
 556 #ifdef HAVE_TRACING
 557     if (TRACE_is_enabled()) {
 558       xbt_dynar_t route=NULL;
 559       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 560       link_CM02_t link;
 561       unsigned int i;
 562       xbt_dynar_foreach(route, i, link) {
 563         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 564                                         action->generic_action.data,
 565                                         (surf_action_t) action,
 566                                         lmm_variable_getvalue
 567                                         (action->variable), now - delta,
 568                                         delta);
 569       }
 570     }
 571 #endif
 572     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 573         /* There is actually no link used, hence an infinite bandwidth.
 574          * This happens often when using models like vivaldi.
 575          * In such case, just make sure that the action completes immediately.
 576          */
 577       double_update(&(action->generic_action.remains),
 578           action->generic_action.remains);
 579     }
 580     double_update(&(action->generic_action.remains),
 581                   lmm_variable_getvalue(action->variable) * deltap);
 582     if (action->generic_action.max_duration != NO_MAX_DURATION)
 583       double_update(&(action->generic_action.max_duration), delta);
 584
 585     if ((action->generic_action.remains <= 0) &&
 586         (lmm_get_variable_weight(action->variable) > 0)) {
 587       action->generic_action.finish = surf_get_clock();
 588       surf_network_model->action_state_set((surf_action_t) action,
 589                                            SURF_ACTION_DONE);
 590
 591       if(gap_remove) gap_remove(action);
 592     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 593                && (action->generic_action.max_duration <= 0)) {
 594       action->generic_action.finish = surf_get_clock();
 595       surf_network_model->action_state_set((surf_action_t) action,
 596                                            SURF_ACTION_DONE);
 597       if(gap_remove) gap_remove(action);
 598     }
 599   }
 600
 601   return;
 602 }
 603
 604 static void net_update_actions_state_lazy(double now, double delta)
 605 {
 606   surf_action_network_CM02_t action = NULL;
 607
 608   while ((xbt_heap_size(net_action_heap) > 0)
 609          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 610     action = xbt_heap_pop(net_action_heap);
 611     XBT_DEBUG("Action %p: finish", action);
 612     GENERIC_ACTION(action).finish = surf_get_clock();
 613
 614     // if I am wearing a latency hat
 615     if( action->hat ==  LATENCY){
 616         lmm_update_variable_weight(network_maxmin_system, action->variable,
 617                                            action->weight);
 618         heap_remove(action);
 619         action->last_update = surf_get_clock();
 620
 621     // if I am wearing a max_duration or normal hat
 622     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 623         // no need to communicate anymore
 624         // assume that flows that reached max_duration have remaining of 0
 625         GENERIC_ACTION(action).remains = 0;
 626         action->generic_action.finish = surf_get_clock();
 627               surf_network_model->action_state_set((surf_action_t) action,
 628                                                    SURF_ACTION_DONE);
 629         heap_remove(action);
 630     }
 631   }
 632   return;
 633 }
 634
 635 static void net_update_resource_state(void *id,
 636                                       tmgr_trace_event_t event_type,
 637                                       double value, double date)
 638 {
 639   link_CM02_t nw_link = id;
 640   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 641   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 642   /*     value, event_type); */
 643
 644   if (event_type == nw_link->lmm_resource.power.event) {
 645     double delta =
 646         sg_weight_S_parameter / value - sg_weight_S_parameter /
 647         (nw_link->lmm_resource.power.peak *
 648          nw_link->lmm_resource.power.scale);
 649     lmm_variable_t var = NULL;
 650     lmm_element_t elem = NULL;
 651     surf_action_network_CM02_t action = NULL;
 652
 653     nw_link->lmm_resource.power.peak = value;
 654     lmm_update_constraint_bound(network_maxmin_system,
 655                                 nw_link->lmm_resource.constraint,
 656                                 sg_bandwidth_factor *
 657                                 (nw_link->lmm_resource.power.peak *
 658                                  nw_link->lmm_resource.power.scale));
 659 #ifdef HAVE_TRACING
 660     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 661                                   sg_bandwidth_factor *
 662                                   (nw_link->lmm_resource.power.peak *
 663                                    nw_link->lmm_resource.power.scale));
 664 #endif
 665     if (sg_weight_S_parameter > 0) {
 666       while ((var = lmm_get_var_from_cnst
 667               (network_maxmin_system, nw_link->lmm_resource.constraint,
 668                &elem))) {
 669         action = lmm_variable_id(var);
 670         action->weight += delta;
 671         if (!(action->suspended))
 672           lmm_update_variable_weight(network_maxmin_system,
 673                                      action->variable, action->weight);
 674       }
 675     }
 676     if (tmgr_trace_event_free(event_type))
 677       nw_link->lmm_resource.power.event = NULL;
 678   } else if (event_type == nw_link->lat_event) {
 679     double delta = value - nw_link->lat_current;
 680     lmm_variable_t var = NULL;
 681     lmm_element_t elem = NULL;
 682     surf_action_network_CM02_t action = NULL;
 683
 684     nw_link->lat_current = value;
 685     while ((var = lmm_get_var_from_cnst
 686             (network_maxmin_system, nw_link->lmm_resource.constraint,
 687              &elem))) {
 688       action = lmm_variable_id(var);
 689       action->lat_current += delta;
 690       action->weight += delta;
 691       if (action->rate < 0)
 692         lmm_update_variable_bound(network_maxmin_system, action->variable,
 693                                   sg_tcp_gamma / (2.0 *
 694                                                   action->lat_current));
 695       else {
 696         lmm_update_variable_bound(network_maxmin_system, action->variable,
 697                                   min(action->rate,
 698                                       sg_tcp_gamma / (2.0 *
 699                                                       action->lat_current)));
 700
 701         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 702           XBT_INFO("Flow is limited BYBANDWIDTH");
 703         } else {
 704           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 705                 action->lat_current);
 706         }
 707       }
 708       if (!(action->suspended))
 709         lmm_update_variable_weight(network_maxmin_system, action->variable,
 710                                    action->weight);
 711
 712     }
 713     if (tmgr_trace_event_free(event_type))
 714       nw_link->lat_event = NULL;
 715   } else if (event_type == nw_link->lmm_resource.state_event) {
 716     if (value > 0)
 717       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 718     else {
 719       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 720       lmm_variable_t var = NULL;
 721       lmm_element_t elem = NULL;
 722
 723       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 724       while ((var = lmm_get_var_from_cnst
 725               (network_maxmin_system, cnst, &elem))) {
 726         surf_action_t action = lmm_variable_id(var);
 727
 728         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 729             surf_action_state_get(action) == SURF_ACTION_READY) {
 730           action->finish = date;
 731           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 732         }
 733       }
 734     }
 735     if (tmgr_trace_event_free(event_type))
 736       nw_link->lmm_resource.state_event = NULL;
 737   } else {
 738     XBT_CRITICAL("Unknown event ! \n");
 739     xbt_abort();
 740   }
 741
 742   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 743   return;
 744 }
 745
 746
 747 static surf_action_t net_communicate(const char *src_name,
 748                                      const char *dst_name, double size,
 749                                      double rate)
 750 {
 751   unsigned int i;
 752   link_CM02_t link;
 753   int failed = 0;
 754   surf_action_network_CM02_t action = NULL;
 755   double bandwidth_bound;
 756   double latency=0.0;
 757   xbt_dynar_t back_route = NULL;
 758   int constraints_per_variable = 0;
 759
 760   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 761
 762   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 763
 764   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 765   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 766               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 767               src_name, dst_name);
 768
 769   xbt_dynar_foreach(route, i, link) {
 770     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 771       failed = 1;
 772       break;
 773     }
 774   }
 775   if (sg_network_crosstraffic == 1) {
 776     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 777     xbt_dynar_foreach(back_route, i, link) {
 778       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 779         failed = 1;
 780         break;
 781       }
 782     }
 783   }
 784
 785   action =
 786       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 787                       surf_network_model, failed);
 788 #ifdef HAVE_LATENCY_BOUND_TRACKING
 789   (action->generic_action).latency_limited = 0;
 790 #endif
 791   action->weight = action->latency = latency;
 792
 793   xbt_swag_insert(action, action->generic_action.state_set);
 794   action->rate = rate;
 795   if(network_update_mechanism == UM_LAZY){
 796     action->index_heap = -1;
 797     action->last_update = surf_get_clock();
 798   }
 799
 800   bandwidth_bound = -1.0;
 801   if(sg_weight_S_parameter>0) {
 802     xbt_dynar_foreach(route, i, link) {
 803       action->weight +=
 804           sg_weight_S_parameter /
 805           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 806     }
 807   }
 808   xbt_dynar_foreach(route, i, link) {
 809     double bb = bandwidth_factor_callback(size) *
 810         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 811     bandwidth_bound = (bandwidth_bound < 0.0)?bb:min(bandwidth_bound,bb);
 812   }
 813
 814   action->lat_current = action->latency;
 815   action->latency *= latency_factor_callback(size);
 816   action->rate =
 817       bandwidth_constraint_callback(action->rate, bandwidth_bound,
 818                                         size);
 819   if(gap_append) {
 820     xbt_assert(!xbt_dynar_is_empty(route),"Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 821
 822     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 823     gap_append(size, link, action);
 824     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 825            action, src_name, dst_name, action->sender.gap, action->latency);
 826   }
 827
 828   constraints_per_variable = xbt_dynar_length(route);
 829   if (back_route != NULL)
 830     constraints_per_variable += xbt_dynar_length(back_route);
 831
 832   if (action->latency > 0){
 833       action->variable =
 834         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 835                          constraints_per_variable);
 836     if(network_update_mechanism == UM_LAZY){
 837       // add to the heap the event when the latency is payed
 838       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 839       heap_insert(action, action->latency + action->last_update, xbt_dynar_is_empty(route)?NORMAL:LATENCY);
 840     }
 841   } else
 842     action->variable =
 843         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 844                          constraints_per_variable);
 845
 846   if (action->rate < 0) {
 847     lmm_update_variable_bound(network_maxmin_system, action->variable,
 848         (action->lat_current > 0)?
 849             sg_tcp_gamma / (2.0 * action->lat_current)  :-1.0);
 850   } else {
 851     lmm_update_variable_bound(network_maxmin_system, action->variable,
 852         (action->lat_current > 0)?
 853             min(action->rate, sg_tcp_gamma / (2.0 * action->lat_current))
 854             :action->rate);
 855   }
 856
 857   xbt_dynar_foreach(route, i, link) {
 858     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 859                action->variable, 1.0);
 860   }
 861
 862   if (sg_network_crosstraffic == 1) {
 863     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 864     xbt_dynar_foreach(back_route, i, link) {
 865       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 866                  action->variable, .05);
 867     }
 868   }
 869
 870 #ifdef HAVE_TRACING
 871   if (TRACE_is_enabled()) {
 872     action->src_name = xbt_strdup(src_name);
 873     action->dst_name = xbt_strdup(dst_name);
 874   } else {
 875     action->src_name = action->dst_name = NULL;
 876   }
 877 #endif
 878
 879   xbt_dynar_free(&route);
 880   XBT_OUT();
 881
 882   return (surf_action_t) action;
 883 }
 884
 885 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 886 {
 887   xbt_dynar_t route=NULL;
 888   routing_get_route_and_latency(src, dst,&route,NULL);
 889   return route;
 890 }
 891
 892 static double net_get_link_bandwidth(const void *link)
 893 {
 894   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 895   return lmm->power.peak * lmm->power.scale;
 896 }
 897
 898 static double net_get_link_latency(const void *link)
 899 {
 900   return ((link_CM02_t) link)->lat_current;
 901 }
 902
 903 static int net_link_shared(const void *link)
 904 {
 905   return
 906       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 907 }
 908
 909 static void net_action_suspend(surf_action_t action)
 910 {
 911   ((surf_action_network_CM02_t) action)->suspended = 1;
 912   lmm_update_variable_weight(network_maxmin_system,
 913                              ((surf_action_network_CM02_t)
 914                               action)->variable, 0.0);
 915
 916   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 917     heap_remove((surf_action_network_CM02_t) action);
 918 }
 919
 920 static void net_action_resume(surf_action_t action)
 921 {
 922   if (((surf_action_network_CM02_t) action)->suspended) {
 923     lmm_update_variable_weight(network_maxmin_system,
 924                                ((surf_action_network_CM02_t)
 925                                 action)->variable,
 926                                ((surf_action_network_CM02_t)
 927                                 action)->weight);
 928     ((surf_action_network_CM02_t) action)->suspended = 0;
 929     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 930       heap_remove((surf_action_network_CM02_t) action);
 931   }
 932 }
 933
 934 static int net_action_is_suspended(surf_action_t action)
 935 {
 936   return ((surf_action_network_CM02_t) action)->suspended;
 937 }
 938
 939 void net_action_set_max_duration(surf_action_t action, double duration)
 940 {
 941   action->max_duration = duration;
 942   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 943     heap_remove((surf_action_network_CM02_t) action);
 944 }
 945
 946 #ifdef HAVE_TRACING
 947 static void net_action_set_category(surf_action_t action, const char *category)
 948 {
 949   action->category = xbt_strdup (category);
 950 }
 951 #endif
 952
 953 static void net_finalize(void)
 954 {
 955   surf_model_exit(surf_network_model);
 956   surf_network_model = NULL;
 957
 958   lmm_system_free(network_maxmin_system);
 959   network_maxmin_system = NULL;
 960
 961   if(network_update_mechanism == UM_LAZY){
 962     xbt_heap_free(net_action_heap);
 963     xbt_swag_free(net_modified_set);
 964   }
 965
 966   if(smpi_bw_factor)
 967           xbt_dynar_free(&smpi_bw_factor);
 968   if(smpi_lat_factor)
 969           xbt_dynar_free(&smpi_lat_factor);
 970 }
 971
 972 static void smpi_gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
 973    const char* src = link->lmm_resource.generic_resource.name;
 974    xbt_fifo_t fifo;
 975    surf_action_network_CM02_t last_action;
 976    double bw;
 977
 978    if(sg_sender_gap > 0.0) {
 979       if(!gap_lookup) {
 980          gap_lookup = xbt_dict_new();
 981       }
 982       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
 983       action->sender.gap = 0.0;
 984       if(fifo && xbt_fifo_size(fifo) > 0) {
 985          /* Compute gap from last send */
 986          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 987          bw = net_get_link_bandwidth(link);
 988          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
 989          action->latency += action->sender.gap;
 990       }
 991       /* Append action as last send */
 992       action->sender.link_name = link->lmm_resource.generic_resource.name;
 993       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
 994       if(!fifo) {
 995          fifo = xbt_fifo_new();
 996          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
 997       }
 998       action->sender.fifo_item = xbt_fifo_push(fifo, action);
 999       action->sender.size = size;
1000    }
1001 }
1002
1003 static void smpi_gap_remove(surf_action_network_CM02_t action) {
1004    xbt_fifo_t fifo;
1005    size_t size;
1006
1007    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1008       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1009       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1010       size = xbt_fifo_size(fifo);
1011       if(size == 0) {
1012          xbt_fifo_free(fifo);
1013          xbt_dict_remove(gap_lookup, action->sender.link_name);
1014          size = xbt_dict_length(gap_lookup);
1015          if(size == 0) {
1016             xbt_dict_free(&gap_lookup);
1017          }
1018       }
1019    }
1020 }
1021
1022 static void surf_network_model_init_internal(void)
1023 {
1024   s_surf_action_network_CM02_t comm;
1025   surf_network_model = surf_model_init();
1026
1027   surf_network_model->name = "network";
1028   surf_network_model->action_unref = net_action_unref;
1029   surf_network_model->action_cancel = net_action_cancel;
1030   surf_network_model->action_recycle = net_action_recycle;
1031   surf_network_model->get_remains = net_action_get_remains;
1032 #ifdef HAVE_LATENCY_BOUND_TRACKING
1033   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1034 #endif
1035 #ifdef HAVE_TRACING
1036   surf_network_model->set_category = net_action_set_category;
1037 #endif
1038
1039   surf_network_model->model_private->resource_used = net_resource_used;
1040   if(network_update_mechanism == UM_LAZY) {
1041     surf_network_model->model_private->share_resources = net_share_resources_lazy;
1042     surf_network_model->model_private->update_actions_state = net_update_actions_state_lazy;
1043   } else if(network_update_mechanism == UM_FULL) {
1044     surf_network_model->model_private->share_resources = net_share_resources_full;
1045     surf_network_model->model_private->update_actions_state = net_update_actions_state_full;
1046   }
1047
1048   surf_network_model->model_private->update_resource_state =
1049                   net_update_resource_state;
1050   surf_network_model->model_private->finalize = net_finalize;
1051
1052   surf_network_model->suspend = net_action_suspend;
1053   surf_network_model->resume = net_action_resume;
1054   surf_network_model->is_suspended = net_action_is_suspended;
1055   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1056
1057   surf_network_model->extension.network.communicate = net_communicate;
1058   surf_network_model->extension.network.get_route = net_get_route;
1059   surf_network_model->extension.network.get_link_bandwidth =
1060                   net_get_link_bandwidth;
1061   surf_network_model->extension.network.get_link_latency =
1062                   net_get_link_latency;
1063   surf_network_model->extension.network.link_shared = net_link_shared;
1064   surf_network_model->extension.network.add_traces = net_add_traces;
1065   surf_network_model->extension.network.create_resource =
1066                   net_create_resource;
1067
1068  if (!network_maxmin_system)
1069     network_maxmin_system = lmm_system_new(net_selective_update);
1070
1071  routing_model_create(sizeof(link_CM02_t),
1072       net_create_resource("__loopback__",
1073           498000000, NULL, 0.000015, NULL,
1074           SURF_RESOURCE_ON, NULL,
1075           SURF_LINK_FATPIPE, NULL));
1076
1077   if(network_update_mechanism == UM_LAZY){
1078     net_action_heap = xbt_heap_new(8,NULL);
1079     xbt_heap_set_update_callback(net_action_heap, net_action_update_index_heap);
1080     net_modified_set = xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1081     network_maxmin_system->keep_track = net_modified_set;
1082   }
1083 }
1084
1085 static void set_update_mechanism(void) {
1086 #ifdef HAVE_TRACING
1087   TRACE_set_network_update_mechanism ();
1088 #endif
1089
1090   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1091   int select = xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1092
1093   if(!strcmp(optim,"Full")) {
1094     network_update_mechanism = UM_FULL;
1095     net_selective_update = select;
1096   } else if (!strcmp(optim,"Lazy")) {
1097     network_update_mechanism = UM_LAZY;
1098     net_selective_update = 1;
1099     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"network/maxmin_selective_update")),
1100         "Disabling selective update while using the lazy update mechanism is dumb!");
1101   } else {
1102     xbt_die("Unsupported optimization (%s) for this model",optim);
1103   }
1104 }
1105
1106 /************************************************************************/
1107 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1108 /************************************************************************/
1109 /* @Inproceedings{smpi_ipdps, */
1110 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1111 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1112 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1113 /*  address={Anchorage (Alaska) USA}, */
1114 /*  month=may, */
1115 /*  year={2011} */
1116 /*  } */
1117 void surf_network_model_init_SMPI(void)
1118 {
1119
1120   if (surf_network_model)
1121     return;
1122   set_update_mechanism();
1123
1124   surf_network_model_init_internal();
1125   latency_factor_callback = &smpi_latency_factor;
1126   bandwidth_factor_callback = &smpi_bandwidth_factor;
1127   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1128   gap_append = &smpi_gap_append;
1129   gap_remove = &smpi_gap_remove;
1130   net_define_callbacks();
1131   xbt_dynar_push(model_list, &surf_network_model);
1132   network_solve = lmm_solve;
1133
1134   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1135   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1136 }
1137
1138 /************************************************************************/
1139 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1140 /************************************************************************/
1141 /* @techreport{VELHO:2011:HAL-00646896:1, */
1142 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1143 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1144 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1145 /*      type = {Rapport de recherche}, */
1146 /*      institution = {INRIA}, */
1147 /*      number = {RR-7821}, */
1148 /*      year = {2011}, */
1149 /*      month = Nov, */
1150 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1151 /*  } */
1152 void surf_network_model_init_LegrandVelho(void)
1153 {
1154   if (surf_network_model)
1155     return;
1156
1157   set_update_mechanism();
1158
1159   surf_network_model_init_internal();
1160   net_define_callbacks();
1161   xbt_dynar_push(model_list, &surf_network_model);
1162   network_solve = lmm_solve;
1163
1164   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 13.01);
1165   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.97);
1166   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1167 }
1168
1169 /***************************************************************************/
1170 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1171 /***************************************************************************/
1172 /* @TechReport{      rr-lip2002-40, */
1173 /*   author        = {Henri Casanova and Loris Marchal}, */
1174 /*   institution   = {LIP}, */
1175 /*   title         = {A Network Model for Simulation of Grid Application}, */
1176 /*   number        = {2002-40}, */
1177 /*   month         = {oct}, */
1178 /*   year          = {2002} */
1179 /* } */
1180 void surf_network_model_init_CM02(void)
1181 {
1182
1183   if (surf_network_model)
1184     return;
1185
1186   set_update_mechanism();
1187   surf_network_model_init_internal();
1188   net_define_callbacks();
1189   xbt_dynar_push(model_list, &surf_network_model);
1190   network_solve = lmm_solve;
1191
1192   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1193   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1194   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1195 }
1196
1197 /***************************************************************************/
1198 /* The models from Steven H. Low                                           */
1199 /***************************************************************************/
1200 /* @article{Low03,                                                         */
1201 /*   author={Steven H. Low},                                               */
1202 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1203 /*   year={2003},                                                          */
1204 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1205 /*    volume={11}, number={4},                                             */
1206 /*  }                                                                      */
1207 void surf_network_model_init_Reno(void)
1208 {
1209   if (surf_network_model)
1210     return;
1211
1212   set_update_mechanism();
1213   surf_network_model_init_internal();
1214   net_define_callbacks();
1215
1216   xbt_dynar_push(model_list, &surf_network_model);
1217   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1218                                     func_reno_fpi);
1219   network_solve = lagrange_solve;
1220
1221   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1222   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1223                             0.92);
1224   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1225 }
1226
1227
1228 void surf_network_model_init_Reno2(void)
1229 {
1230   if (surf_network_model)
1231     return;
1232
1233   set_update_mechanism();
1234   surf_network_model_init_internal();
1235   net_define_callbacks();
1236
1237   xbt_dynar_push(model_list, &surf_network_model);
1238   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1239                                     func_reno2_fpi);
1240   network_solve = lagrange_solve;
1241
1242   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1243   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1244                             0.92);
1245   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1246                             8775);
1247 }
1248
1249 void surf_network_model_init_Vegas(void)
1250 {
1251   if (surf_network_model)
1252     return;
1253
1254   set_update_mechanism();
1255   surf_network_model_init_internal();
1256   net_define_callbacks();
1257
1258   xbt_dynar_push(model_list, &surf_network_model);
1259   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1260                                     func_vegas_fpi);
1261   network_solve = lagrange_solve;
1262
1263   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1264   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1265                             0.92);
1266   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1267 }