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 = NONE;
  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   network_maxmin_system->keep_track = net_modified_set;
 468   lmm_solve(network_maxmin_system);
 469   network_maxmin_system->keep_track = NULL;
 470
 471   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(net_modified_set));
 472
 473   xbt_swag_foreach(action, net_modified_set) {
 474     int max_dur_flag = 0;
 475
 476     if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 477       continue;
 478     }
 479
 480     /* bogus priority, skip it */
 481     if (GENERIC_ACTION(action).priority <= 0){
 482       continue;
 483     }
 484
 485     min = -1;
 486     value = lmm_variable_getvalue(action->variable);
 487     if (value > 0) {
 488       if (GENERIC_ACTION(action).remains > 0) {
 489         value = GENERIC_ACTION(action).remains / value;
 490         min = now + value;
 491       } else {
 492         value = 0.0;
 493         min = now;
 494       }
 495     }
 496
 497     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 498         && (min == -1
 499             || GENERIC_ACTION(action).start +
 500             GENERIC_ACTION(action).max_duration < min)){
 501       min =   GENERIC_ACTION(action).start +
 502           GENERIC_ACTION(action).max_duration;
 503       max_dur_flag = 1;
 504     }
 505
 506     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 507         GENERIC_ACTION(action).start, now + value,
 508         GENERIC_ACTION(action).max_duration);
 509
 510     if (action->index_heap >= 0) {
 511       heap_remove((surf_action_network_CM02_t) action);
 512     }
 513
 514     if (min != -1) {
 515       heap_insert((surf_action_network_CM02_t) action, min, max_dur_flag?MAX_DURATION:NORMAL);
 516       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 517     }
 518   }
 519
 520   //hereafter must have already the min value for this resource model
 521   if(xbt_heap_size(net_action_heap) > 0 ){
 522     min = xbt_heap_maxkey(net_action_heap) - now ;
 523   }else{
 524     min = -1;
 525   }
 526
 527   XBT_DEBUG("The minimum with the HEAP %lf", min);
 528
 529   return min;
 530 }
 531
 532 static void net_update_actions_state_full(double now, double delta)
 533 {
 534   double deltap = 0.0;
 535   surf_action_network_CM02_t action = NULL;
 536   surf_action_network_CM02_t next_action = NULL;
 537   xbt_swag_t running_actions =
 538       surf_network_model->states.running_action_set;
 539   /*
 540      xbt_swag_t failed_actions =
 541      surf_network_model->states.failed_action_set;
 542    */
 543
 544   xbt_swag_foreach_safe(action, next_action, running_actions) {
 545     deltap = delta;
 546     if (action->latency > 0) {
 547       if (action->latency > deltap) {
 548         double_update(&(action->latency), deltap);
 549         deltap = 0.0;
 550       } else {
 551         double_update(&(deltap), action->latency);
 552         action->latency = 0.0;
 553       }
 554       if ((action->latency == 0.0) && !(action->suspended))
 555         lmm_update_variable_weight(network_maxmin_system, action->variable,
 556                                    action->weight);
 557     }
 558 #ifdef HAVE_TRACING
 559     if (TRACE_is_enabled()) {
 560       xbt_dynar_t route=NULL;
 561       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 562       link_CM02_t link;
 563       unsigned int i;
 564       xbt_dynar_foreach(route, i, link) {
 565         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 566                                         action->generic_action.data,
 567                                         (surf_action_t) action,
 568                                         lmm_variable_getvalue
 569                                         (action->variable), now - delta,
 570                                         delta);
 571       }
 572     }
 573 #endif
 574     if(!lmm_get_number_of_cnst_from_var(network_maxmin_system, action->variable)) {
 575         /* There is actually no link used, hence an infinite bandwidth.
 576          * This happens often when using models like vivaldi.
 577          * In such case, just make sure that the action completes immediately.
 578          */
 579       double_update(&(action->generic_action.remains),
 580           action->generic_action.remains);
 581     }
 582     double_update(&(action->generic_action.remains),
 583                   lmm_variable_getvalue(action->variable) * deltap);
 584     if (action->generic_action.max_duration != NO_MAX_DURATION)
 585       double_update(&(action->generic_action.max_duration), delta);
 586
 587     if ((action->generic_action.remains <= 0) &&
 588         (lmm_get_variable_weight(action->variable) > 0)) {
 589       action->generic_action.finish = surf_get_clock();
 590       surf_network_model->action_state_set((surf_action_t) action,
 591                                            SURF_ACTION_DONE);
 592
 593       if(gap_remove) gap_remove(action);
 594     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 595                && (action->generic_action.max_duration <= 0)) {
 596       action->generic_action.finish = surf_get_clock();
 597       surf_network_model->action_state_set((surf_action_t) action,
 598                                            SURF_ACTION_DONE);
 599       if(gap_remove) gap_remove(action);
 600     }
 601   }
 602
 603   return;
 604 }
 605
 606 static void net_update_actions_state_lazy(double now, double delta)
 607 {
 608   surf_action_network_CM02_t action = NULL;
 609
 610   while ((xbt_heap_size(net_action_heap) > 0)
 611          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 612     action = xbt_heap_pop(net_action_heap);
 613     XBT_DEBUG("Action %p: finish", action);
 614     GENERIC_ACTION(action).finish = surf_get_clock();
 615
 616     // if I am wearing a latency hat
 617     if( action->hat ==  LATENCY){
 618         lmm_update_variable_weight(network_maxmin_system, action->variable,
 619                                            action->weight);
 620         heap_remove(action);
 621         action->last_update = surf_get_clock();
 622
 623     // if I am wearing a max_duration or normal hat
 624     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 625         // no need to communicate anymore
 626         // assume that flows that reached max_duration have remaining of 0
 627         GENERIC_ACTION(action).remains = 0;
 628         action->generic_action.finish = surf_get_clock();
 629               surf_network_model->action_state_set((surf_action_t) action,
 630                                                    SURF_ACTION_DONE);
 631         heap_remove(action);
 632     }
 633   }
 634   return;
 635 }
 636
 637 static void net_update_resource_state(void *id,
 638                                       tmgr_trace_event_t event_type,
 639                                       double value, double date)
 640 {
 641   link_CM02_t nw_link = id;
 642   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 643   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 644   /*     value, event_type); */
 645
 646   if (event_type == nw_link->lmm_resource.power.event) {
 647     double delta =
 648         sg_weight_S_parameter / value - sg_weight_S_parameter /
 649         (nw_link->lmm_resource.power.peak *
 650          nw_link->lmm_resource.power.scale);
 651     lmm_variable_t var = NULL;
 652     lmm_element_t elem = NULL;
 653     surf_action_network_CM02_t action = NULL;
 654
 655     nw_link->lmm_resource.power.peak = value;
 656     lmm_update_constraint_bound(network_maxmin_system,
 657                                 nw_link->lmm_resource.constraint,
 658                                 sg_bandwidth_factor *
 659                                 (nw_link->lmm_resource.power.peak *
 660                                  nw_link->lmm_resource.power.scale));
 661 #ifdef HAVE_TRACING
 662     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 663                                   sg_bandwidth_factor *
 664                                   (nw_link->lmm_resource.power.peak *
 665                                    nw_link->lmm_resource.power.scale));
 666 #endif
 667     if (sg_weight_S_parameter > 0) {
 668       while ((var = lmm_get_var_from_cnst
 669               (network_maxmin_system, nw_link->lmm_resource.constraint,
 670                &elem))) {
 671         action = lmm_variable_id(var);
 672         action->weight += delta;
 673         if (!(action->suspended))
 674           lmm_update_variable_weight(network_maxmin_system,
 675                                      action->variable, action->weight);
 676       }
 677     }
 678     if (tmgr_trace_event_free(event_type))
 679       nw_link->lmm_resource.power.event = NULL;
 680   } else if (event_type == nw_link->lat_event) {
 681     double delta = value - nw_link->lat_current;
 682     lmm_variable_t var = NULL;
 683     lmm_element_t elem = NULL;
 684     surf_action_network_CM02_t action = NULL;
 685
 686     nw_link->lat_current = value;
 687     while ((var = lmm_get_var_from_cnst
 688             (network_maxmin_system, nw_link->lmm_resource.constraint,
 689              &elem))) {
 690       action = lmm_variable_id(var);
 691       action->lat_current += delta;
 692       action->weight += delta;
 693       if (action->rate < 0)
 694         lmm_update_variable_bound(network_maxmin_system, action->variable,
 695                                   sg_tcp_gamma / (2.0 *
 696                                                   action->lat_current));
 697       else {
 698         lmm_update_variable_bound(network_maxmin_system, action->variable,
 699                                   min(action->rate,
 700                                       sg_tcp_gamma / (2.0 *
 701                                                       action->lat_current)));
 702
 703         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 704           XBT_INFO("Flow is limited BYBANDWIDTH");
 705         } else {
 706           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 707                 action->lat_current);
 708         }
 709       }
 710       if (!(action->suspended))
 711         lmm_update_variable_weight(network_maxmin_system, action->variable,
 712                                    action->weight);
 713
 714     }
 715     if (tmgr_trace_event_free(event_type))
 716       nw_link->lat_event = NULL;
 717   } else if (event_type == nw_link->lmm_resource.state_event) {
 718     if (value > 0)
 719       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 720     else {
 721       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 722       lmm_variable_t var = NULL;
 723       lmm_element_t elem = NULL;
 724
 725       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 726       while ((var = lmm_get_var_from_cnst
 727               (network_maxmin_system, cnst, &elem))) {
 728         surf_action_t action = lmm_variable_id(var);
 729
 730         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 731             surf_action_state_get(action) == SURF_ACTION_READY) {
 732           action->finish = date;
 733           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 734         }
 735       }
 736     }
 737     if (tmgr_trace_event_free(event_type))
 738       nw_link->lmm_resource.state_event = NULL;
 739   } else {
 740     XBT_CRITICAL("Unknown event ! \n");
 741     xbt_abort();
 742   }
 743
 744   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 745   return;
 746 }
 747
 748
 749 static surf_action_t net_communicate(const char *src_name,
 750                                      const char *dst_name, double size,
 751                                      double rate)
 752 {
 753   unsigned int i;
 754   link_CM02_t link;
 755   int failed = 0;
 756   surf_action_network_CM02_t action = NULL;
 757   double bandwidth_bound;
 758   double latency=0.0;
 759   xbt_dynar_t back_route = NULL;
 760   int constraints_per_variable = 0;
 761
 762   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 763
 764   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 765
 766   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 767   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 768               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 769               src_name, dst_name);
 770
 771   xbt_dynar_foreach(route, i, link) {
 772     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 773       failed = 1;
 774       break;
 775     }
 776   }
 777   if (sg_network_crosstraffic == 1) {
 778     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 779     xbt_dynar_foreach(back_route, i, link) {
 780       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 781         failed = 1;
 782         break;
 783       }
 784     }
 785   }
 786
 787   action =
 788       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 789                       surf_network_model, failed);
 790 #ifdef HAVE_LATENCY_BOUND_TRACKING
 791   (action->generic_action).latency_limited = 0;
 792 #endif
 793   action->weight = action->latency = latency;
 794
 795   xbt_swag_insert(action, action->generic_action.state_set);
 796   action->rate = rate;
 797   if(network_update_mechanism == UM_LAZY){
 798     action->index_heap = -1;
 799     action->last_update = surf_get_clock();
 800   }
 801
 802   bandwidth_bound = -1.0;
 803   if(sg_weight_S_parameter>0) {
 804     xbt_dynar_foreach(route, i, link) {
 805       action->weight +=
 806           sg_weight_S_parameter /
 807           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 808     }
 809   }
 810   xbt_dynar_foreach(route, i, link) {
 811     double bb = bandwidth_factor_callback(size) *
 812         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 813     bandwidth_bound = (bandwidth_bound < 0.0)?bb:min(bandwidth_bound,bb);
 814   }
 815
 816   action->lat_current = action->latency;
 817   action->latency *= latency_factor_callback(size);
 818   action->rate =
 819       bandwidth_constraint_callback(action->rate, bandwidth_bound,
 820                                         size);
 821   if(gap_append) {
 822     xbt_assert(!xbt_dynar_is_empty(route),"Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 823
 824     link = *(link_CM02_t*)xbt_dynar_get_ptr(route, 0);
 825     gap_append(size, link, action);
 826     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 827            action, src_name, dst_name, action->sender.gap, action->latency);
 828   }
 829
 830   constraints_per_variable = xbt_dynar_length(route);
 831   if (back_route != NULL)
 832     constraints_per_variable += xbt_dynar_length(back_route);
 833
 834   if (action->latency > 0){
 835       action->variable =
 836         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 837                          constraints_per_variable);
 838     if(network_update_mechanism == UM_LAZY){
 839       // add to the heap the event when the latency is payed
 840       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 841       heap_insert(action, action->latency + action->last_update, xbt_dynar_is_empty(route)?NORMAL:LATENCY);
 842     }
 843   } else
 844     action->variable =
 845         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 846                          constraints_per_variable);
 847
 848   if (action->rate < 0) {
 849     lmm_update_variable_bound(network_maxmin_system, action->variable,
 850         (action->lat_current > 0)?
 851             sg_tcp_gamma / (2.0 * action->lat_current)  :-1.0);
 852   } else {
 853     lmm_update_variable_bound(network_maxmin_system, action->variable,
 854         (action->lat_current > 0)?
 855             min(action->rate, sg_tcp_gamma / (2.0 * action->lat_current))
 856             :action->rate);
 857   }
 858
 859   xbt_dynar_foreach(route, i, link) {
 860     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 861                action->variable, 1.0);
 862   }
 863
 864   if (sg_network_crosstraffic == 1) {
 865     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 866     xbt_dynar_foreach(back_route, i, link) {
 867       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 868                  action->variable, .05);
 869     }
 870   }
 871
 872 #ifdef HAVE_TRACING
 873   if (TRACE_is_enabled()) {
 874     action->src_name = xbt_strdup(src_name);
 875     action->dst_name = xbt_strdup(dst_name);
 876   } else {
 877     action->src_name = action->dst_name = NULL;
 878   }
 879 #endif
 880
 881   xbt_dynar_free(&route);
 882   XBT_OUT();
 883
 884   return (surf_action_t) action;
 885 }
 886
 887 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 888 {
 889   xbt_dynar_t route=NULL;
 890   routing_get_route_and_latency(src, dst,&route,NULL);
 891   return route;
 892 }
 893
 894 static double net_get_link_bandwidth(const void *link)
 895 {
 896   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 897   return lmm->power.peak * lmm->power.scale;
 898 }
 899
 900 static double net_get_link_latency(const void *link)
 901 {
 902   return ((link_CM02_t) link)->lat_current;
 903 }
 904
 905 static int net_link_shared(const void *link)
 906 {
 907   return
 908       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 909 }
 910
 911 static void net_action_suspend(surf_action_t action)
 912 {
 913   ((surf_action_network_CM02_t) action)->suspended = 1;
 914   lmm_update_variable_weight(network_maxmin_system,
 915                              ((surf_action_network_CM02_t)
 916                               action)->variable, 0.0);
 917
 918   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 919     heap_remove((surf_action_network_CM02_t) action);
 920 }
 921
 922 static void net_action_resume(surf_action_t action)
 923 {
 924   if (((surf_action_network_CM02_t) action)->suspended) {
 925     lmm_update_variable_weight(network_maxmin_system,
 926                                ((surf_action_network_CM02_t)
 927                                 action)->variable,
 928                                ((surf_action_network_CM02_t)
 929                                 action)->weight);
 930     ((surf_action_network_CM02_t) action)->suspended = 0;
 931     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 932       heap_remove((surf_action_network_CM02_t) action);
 933   }
 934 }
 935
 936 static int net_action_is_suspended(surf_action_t action)
 937 {
 938   return ((surf_action_network_CM02_t) action)->suspended;
 939 }
 940
 941 void net_action_set_max_duration(surf_action_t action, double duration)
 942 {
 943   action->max_duration = duration;
 944   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 945     heap_remove((surf_action_network_CM02_t) action);
 946 }
 947
 948 #ifdef HAVE_TRACING
 949 static void net_action_set_category(surf_action_t action, const char *category)
 950 {
 951   action->category = xbt_strdup (category);
 952 }
 953 #endif
 954
 955 static void net_finalize(void)
 956 {
 957   surf_model_exit(surf_network_model);
 958   surf_network_model = NULL;
 959
 960   lmm_system_free(network_maxmin_system);
 961   network_maxmin_system = NULL;
 962
 963   if(network_update_mechanism == UM_LAZY){
 964     xbt_heap_free(net_action_heap);
 965     xbt_swag_free(net_modified_set);
 966   }
 967
 968   if(smpi_bw_factor)
 969           xbt_dynar_free(&smpi_bw_factor);
 970   if(smpi_lat_factor)
 971           xbt_dynar_free(&smpi_lat_factor);
 972 }
 973
 974 static void smpi_gap_append(double size, const link_CM02_t link, surf_action_network_CM02_t action) {
 975    const char* src = link->lmm_resource.generic_resource.name;
 976    xbt_fifo_t fifo;
 977    surf_action_network_CM02_t last_action;
 978    double bw;
 979
 980    if(sg_sender_gap > 0.0) {
 981       if(!gap_lookup) {
 982          gap_lookup = xbt_dict_new();
 983       }
 984       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
 985       action->sender.gap = 0.0;
 986       if(fifo && xbt_fifo_size(fifo) > 0) {
 987          /* Compute gap from last send */
 988          last_action = (surf_action_network_CM02_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 989          bw = net_get_link_bandwidth(link);
 990          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
 991          action->latency += action->sender.gap;
 992       }
 993       /* Append action as last send */
 994       action->sender.link_name = link->lmm_resource.generic_resource.name;
 995       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
 996       if(!fifo) {
 997          fifo = xbt_fifo_new();
 998          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
 999       }
1000       action->sender.fifo_item = xbt_fifo_push(fifo, action);
1001       action->sender.size = size;
1002    }
1003 }
1004
1005 static void smpi_gap_remove(surf_action_network_CM02_t action) {
1006    xbt_fifo_t fifo;
1007    size_t size;
1008
1009    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1010       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1011       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1012       size = xbt_fifo_size(fifo);
1013       if(size == 0) {
1014          xbt_fifo_free(fifo);
1015          xbt_dict_remove(gap_lookup, action->sender.link_name);
1016          size = xbt_dict_length(gap_lookup);
1017          if(size == 0) {
1018             xbt_dict_free(&gap_lookup);
1019          }
1020       }
1021    }
1022 }
1023
1024 static void surf_network_model_init_internal(void)
1025 {
1026   s_surf_action_network_CM02_t comm;
1027   surf_network_model = surf_model_init();
1028
1029   surf_network_model->name = "network";
1030   surf_network_model->action_unref = net_action_unref;
1031   surf_network_model->action_cancel = net_action_cancel;
1032   surf_network_model->action_recycle = net_action_recycle;
1033   surf_network_model->get_remains = net_action_get_remains;
1034 #ifdef HAVE_LATENCY_BOUND_TRACKING
1035   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1036 #endif
1037 #ifdef HAVE_TRACING
1038   surf_network_model->set_category = net_action_set_category;
1039 #endif
1040
1041   surf_network_model->model_private->resource_used = net_resource_used;
1042   if(network_update_mechanism == UM_LAZY) {
1043     surf_network_model->model_private->share_resources = net_share_resources_lazy;
1044     surf_network_model->model_private->update_actions_state = net_update_actions_state_lazy;
1045   } else if(network_update_mechanism == UM_FULL) {
1046     surf_network_model->model_private->share_resources = net_share_resources_full;
1047     surf_network_model->model_private->update_actions_state = net_update_actions_state_full;
1048   }
1049
1050   surf_network_model->model_private->update_resource_state =
1051                   net_update_resource_state;
1052   surf_network_model->model_private->finalize = net_finalize;
1053
1054   surf_network_model->suspend = net_action_suspend;
1055   surf_network_model->resume = net_action_resume;
1056   surf_network_model->is_suspended = net_action_is_suspended;
1057   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1058
1059   surf_network_model->extension.network.communicate = net_communicate;
1060   surf_network_model->extension.network.get_route = net_get_route;
1061   surf_network_model->extension.network.get_link_bandwidth =
1062                   net_get_link_bandwidth;
1063   surf_network_model->extension.network.get_link_latency =
1064                   net_get_link_latency;
1065   surf_network_model->extension.network.link_shared = net_link_shared;
1066   surf_network_model->extension.network.add_traces = net_add_traces;
1067   surf_network_model->extension.network.create_resource =
1068                   net_create_resource;
1069
1070  if (!network_maxmin_system)
1071     network_maxmin_system = lmm_system_new(net_selective_update);
1072
1073  routing_model_create(sizeof(link_CM02_t),
1074       net_create_resource("__loopback__",
1075           498000000, NULL, 0.000015, NULL,
1076           SURF_RESOURCE_ON, NULL,
1077           SURF_LINK_FATPIPE, NULL));
1078
1079   if(network_update_mechanism == UM_LAZY){
1080     net_action_heap = xbt_heap_new(8,NULL);
1081     xbt_heap_set_update_callback(net_action_heap, net_action_update_index_heap);
1082     net_modified_set =
1083         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1084   }
1085 }
1086
1087 static void set_update_mechanism(void) {
1088 #ifdef HAVE_TRACING
1089   TRACE_set_network_update_mechanism ();
1090 #endif
1091
1092   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1093   int select = xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1094
1095   if(!strcmp(optim,"Full")) {
1096     network_update_mechanism = UM_FULL;
1097     net_selective_update = select;
1098   } else if (!strcmp(optim,"Lazy")) {
1099     network_update_mechanism = UM_LAZY;
1100     net_selective_update = 1;
1101     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"network/maxmin_selective_update")),
1102         "Disabling selective update while using the lazy update mechanism is dumb!");
1103   } else {
1104     xbt_die("Unsupported optimization (%s) for this model",optim);
1105   }
1106 }
1107
1108 /************************************************************************/
1109 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1110 /************************************************************************/
1111 /* @Inproceedings{smpi_ipdps, */
1112 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1113 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1114 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1115 /*  address={Anchorage (Alaska) USA}, */
1116 /*  month=may, */
1117 /*  year={2011} */
1118 /*  } */
1119 void surf_network_model_init_SMPI(void)
1120 {
1121
1122   if (surf_network_model)
1123     return;
1124   set_update_mechanism();
1125
1126   surf_network_model_init_internal();
1127   latency_factor_callback = &smpi_latency_factor;
1128   bandwidth_factor_callback = &smpi_bandwidth_factor;
1129   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1130   gap_append = &smpi_gap_append;
1131   gap_remove = &smpi_gap_remove;
1132   net_define_callbacks();
1133   xbt_dynar_push(model_list, &surf_network_model);
1134   network_solve = lmm_solve;
1135
1136   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1137   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1138 }
1139
1140 /************************************************************************/
1141 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1142 /************************************************************************/
1143 /* @techreport{VELHO:2011:HAL-00646896:1, */
1144 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1145 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1146 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1147 /*      type = {Rapport de recherche}, */
1148 /*      institution = {INRIA}, */
1149 /*      number = {RR-7821}, */
1150 /*      year = {2011}, */
1151 /*      month = Nov, */
1152 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1153 /*  } */
1154 void surf_network_model_init_LegrandVelho(void)
1155 {
1156   if (surf_network_model)
1157     return;
1158
1159   set_update_mechanism();
1160
1161   surf_network_model_init_internal();
1162   net_define_callbacks();
1163   xbt_dynar_push(model_list, &surf_network_model);
1164   network_solve = lmm_solve;
1165
1166   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 13.01);
1167   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.97);
1168   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1169 }
1170
1171 /***************************************************************************/
1172 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1173 /***************************************************************************/
1174 /* @TechReport{      rr-lip2002-40, */
1175 /*   author        = {Henri Casanova and Loris Marchal}, */
1176 /*   institution   = {LIP}, */
1177 /*   title         = {A Network Model for Simulation of Grid Application}, */
1178 /*   number        = {2002-40}, */
1179 /*   month         = {oct}, */
1180 /*   year          = {2002} */
1181 /* } */
1182 void surf_network_model_init_CM02(void)
1183 {
1184
1185   if (surf_network_model)
1186     return;
1187
1188   set_update_mechanism();
1189   surf_network_model_init_internal();
1190   net_define_callbacks();
1191   xbt_dynar_push(model_list, &surf_network_model);
1192   network_solve = lmm_solve;
1193
1194   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1195   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1196   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1197 }
1198
1199 /***************************************************************************/
1200 /* The models from Steven H. Low                                           */
1201 /***************************************************************************/
1202 /* @article{Low03,                                                         */
1203 /*   author={Steven H. Low},                                               */
1204 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1205 /*   year={2003},                                                          */
1206 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1207 /*    volume={11}, number={4},                                             */
1208 /*  }                                                                      */
1209 void surf_network_model_init_Reno(void)
1210 {
1211   if (surf_network_model)
1212     return;
1213
1214   set_update_mechanism();
1215   surf_network_model_init_internal();
1216   net_define_callbacks();
1217
1218   xbt_dynar_push(model_list, &surf_network_model);
1219   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1220                                     func_reno_fpi);
1221   network_solve = lagrange_solve;
1222
1223   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1224   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1225                             0.92);
1226   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1227 }
1228
1229
1230 void surf_network_model_init_Reno2(void)
1231 {
1232   if (surf_network_model)
1233     return;
1234
1235   set_update_mechanism();
1236   surf_network_model_init_internal();
1237   net_define_callbacks();
1238
1239   xbt_dynar_push(model_list, &surf_network_model);
1240   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1241                                     func_reno2_fpi);
1242   network_solve = lagrange_solve;
1243
1244   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1245   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1246                             0.92);
1247   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1248                             8775);
1249 }
1250
1251 void surf_network_model_init_Vegas(void)
1252 {
1253   if (surf_network_model)
1254     return;
1255
1256   set_update_mechanism();
1257   surf_network_model_init_internal();
1258   net_define_callbacks();
1259
1260   xbt_dynar_push(model_list, &surf_network_model);
1261   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1262                                     func_vegas_fpi);
1263   network_solve = lagrange_solve;
1264
1265   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1266   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1267                             0.92);
1268   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1269 }