src/surf/network_im.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
  27 #undef GENERIC_ACTION
  28 #define GENERIC_ACTION(action) action->generic_action
  29
  30
  31 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  32                                 "Logging specific to the SURF network module");
  33
  34 surf_model_t surf_network_model = NULL;
  35 static lmm_system_t network_im_maxmin_system = NULL;
  36 static void (*network_im_solve) (lmm_system_t) = NULL;
  37
  38 double sg_sender_gap = 0.0;
  39 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  40 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  41 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  42
  43 double sg_tcp_gamma = 0.0;
  44 int sg_network_crosstraffic = 0;
  45
  46 xbt_dict_t gap_lookup = NULL;
  47
  48 e_UM_t network_update_mechanism = UM_FULL;
  49
  50 typedef struct network_link_CM02_im {
  51   s_surf_resource_lmm_t lmm_resource;   /* must remain first to be added to a trace */
  52
  53   /* Using this object with the public part of
  54      model does not make sense */
  55   double lat_current;
  56   tmgr_trace_event_t lat_event;
  57 } s_link_CM02_im_t, *link_CM02_im_t;
  58
  59 static int im_net_action_is_suspended(surf_action_t action);
  60 static void im_net_update_actions_state(double now, double delta);
  61 static void update_action_remaining(double now);
  62
  63 static xbt_swag_t im_net_modified_set = NULL;
  64 static xbt_heap_t im_net_action_heap = NULL;
  65 xbt_swag_t keep_track = NULL;
  66 extern int sg_maxmin_selective_update;
  67
  68 #ifdef HAVE_SMPI
  69 static void gap_append(double size, const link_CM02_im_t link, surf_action_network_CM02_im_t action);
  70 static void gap_unknown(surf_action_network_CM02_im_t action);
  71 static void gap_remove(surf_action_network_CM02_im_t action);
  72 #endif
  73
  74 /* added to manage the communication action's heap */
  75 static void im_net_action_update_index_heap(void *action, int i)
  76 {
  77   ((surf_action_network_CM02_im_t) action)->index_heap = i;
  78 }
  79
  80 /* insert action on heap using a given key and a hat (heap_action_type)
  81  * a hat can be of three types for communications:
  82  *
  83  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  84  * LATENCY = this is a heap entry to warn us when the latency is payed
  85  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  86  */
  87 static void heap_insert(surf_action_network_CM02_im_t    action, double key, enum heap_action_type hat){
  88   action->hat = hat;
  89   xbt_heap_push(im_net_action_heap, action, key);
  90 }
  91
  92 static void heap_remove(surf_action_network_CM02_im_t action){
  93   action->hat = NONE;
  94   if(((surf_action_network_CM02_im_t) action)->index_heap >= 0){
  95       xbt_heap_remove(im_net_action_heap,action->index_heap);
  96   }
  97 }
  98
  99 /******************************************************************************/
 100 /*                           Factors callbacks                                */
 101 /******************************************************************************/
 102 static double im_constant_latency_factor(double size)
 103 {
 104   return sg_latency_factor;
 105 }
 106
 107 static double im_constant_bandwidth_factor(double size)
 108 {
 109   return sg_bandwidth_factor;
 110 }
 111
 112 static double im_constant_bandwidth_constraint(double rate, double bound,
 113                                             double size)
 114 {
 115   return rate;
 116 }
 117
 118
 119 /**********************/
 120 /*   SMPI callbacks   */
 121 /**********************/
 122 static double smpi_latency_factor(double size)
 123 {
 124   /* 1 B <= size <= 1 KiB */
 125   if (size <= 1024.0) {
 126     return 1.0056;
 127   }
 128
 129   /* 2 KiB <= size <= 32 KiB */
 130   if (size <= 32768.0) {
 131     return 1.8805;
 132   }
 133
 134   /* 64 KiB <= size <= 4 MiB */
 135   return 22.7111;
 136 }
 137
 138 static double smpi_bandwidth_factor(double size)
 139 {
 140   /* 1 B <= size <= 1 KiB */
 141   if (size <= 1024.0) {
 142     return 0.2758;
 143   }
 144
 145   /* 2 KiB <= size <= 32 KiB */
 146   if (size <= 32768.0) {
 147     return 0.5477;
 148   }
 149
 150   /* 64 KiB <= size <= 4 MiB */
 151   return 0.9359;
 152 }
 153
 154 static double smpi_bandwidth_constraint(double rate, double bound,
 155                                         double size)
 156 {
 157   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 158 }
 159
 160 static double (*im_latency_factor_callback) (double) =
 161     &im_constant_latency_factor;
 162 static double (*im_bandwidth_factor_callback) (double) =
 163     &im_constant_bandwidth_factor;
 164 static double (*im_bandwidth_constraint_callback) (double, double, double) =
 165     &im_constant_bandwidth_constraint;
 166
 167
 168 static void* im_net_create_resource(const char *name,
 169                                 double bw_initial,
 170                                 tmgr_trace_t bw_trace,
 171                                 double lat_initial,
 172                                 tmgr_trace_t lat_trace,
 173                                 e_surf_resource_state_t
 174                                 state_initial,
 175                                 tmgr_trace_t state_trace,
 176                                 e_surf_link_sharing_policy_t
 177                                 policy, xbt_dict_t properties)
 178 {
 179   link_CM02_im_t nw_link = (link_CM02_im_t)
 180       surf_resource_lmm_new(sizeof(s_link_CM02_im_t),
 181                             surf_network_model, name, properties,
 182                             network_im_maxmin_system,
 183                             sg_bandwidth_factor * bw_initial,
 184                             history,
 185                             state_initial, state_trace,
 186                             bw_initial, bw_trace);
 187
 188   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 189               "Link '%s' declared several times in the platform file.",
 190               name);
 191
 192   nw_link->lat_current = lat_initial;
 193   if (lat_trace)
 194     nw_link->lat_event =
 195         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 196
 197   if (policy == SURF_LINK_FATPIPE)
 198     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 199
 200   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 201
 202   return nw_link;
 203 }
 204
 205 static void im_net_parse_link_init(sg_platf_link_cbarg_t link)
 206 {
 207   if(link->policy == SURF_LINK_FULLDUPLEX){
 208     char *link_id;
 209     link_id = bprintf("%s_UP", link->id);
 210           im_net_create_resource(link_id,
 211                            link->bandwidth,
 212                            link->bandwidth_trace,
 213                            link->latency,
 214                            link->latency_trace,
 215                            link->state,
 216                            link->state_trace,
 217                            link->policy,
 218                            link->properties);
 219           xbt_free(link_id);
 220     link_id = bprintf("%s_DOWN", link->id);
 221     im_net_create_resource(link_id,
 222                         link->bandwidth,
 223                         link->bandwidth_trace,
 224                         link->latency,
 225                         link->latency_trace,
 226                         link->state,
 227                         link->state_trace,
 228                         link->policy,
 229                         link->properties);
 230     xbt_free(link_id);
 231   }
 232   else{
 233     im_net_create_resource(link->id,
 234                         link->bandwidth,
 235                         link->bandwidth_trace,
 236                         link->latency,
 237                         link->latency_trace,
 238                         link->state,
 239                         link->state_trace,
 240                         link->policy,
 241                         link->properties);
 242   }
 243 }
 244
 245 static void im_net_add_traces(void)
 246 {
 247   xbt_dict_cursor_t cursor = NULL;
 248   char *trace_name, *elm;
 249
 250   static int called = 0;
 251   if (called)
 252     return;
 253   called = 1;
 254
 255   /* connect all traces relative to network */
 256   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 257     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 258     link_CM02_im_t link =
 259                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 260
 261     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 262                 trace_name, elm);
 263     xbt_assert(trace,
 264                 "Cannot connect trace %s to link %s: trace undefined",
 265                 trace_name, elm);
 266
 267     link->lmm_resource.state_event =
 268         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 269   }
 270
 271   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 272     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 273     link_CM02_im_t link =
 274                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 275
 276     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 277                 trace_name, elm);
 278     xbt_assert(trace,
 279                 "Cannot connect trace %s to link %s: trace undefined",
 280                 trace_name, elm);
 281
 282     link->lmm_resource.power.event =
 283         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 284   }
 285
 286   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 287     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 288     link_CM02_im_t link =
 289                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 290
 291     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 292                 trace_name, elm);
 293     xbt_assert(trace,
 294                 "Cannot connect trace %s to link %s: trace undefined",
 295                 trace_name, elm);
 296
 297     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 298   }
 299 }
 300
 301 static void im_net_define_callbacks(void)
 302 {
 303   /* Figuring out the network links */
 304   sg_platf_link_add_cb(im_net_parse_link_init);
 305   sg_platf_postparse_add_cb(im_net_add_traces);
 306 }
 307
 308 static int im_net_resource_used(void *resource_id)
 309 {
 310   return lmm_constraint_used(network_im_maxmin_system,
 311                              ((surf_resource_lmm_t)
 312                               resource_id)->constraint);
 313 }
 314
 315 static int im_net_action_unref(surf_action_t action)
 316 {
 317   action->refcount--;
 318   if (!action->refcount) {
 319     xbt_swag_remove(action, action->state_set);
 320     if (((surf_action_network_CM02_im_t) action)->variable){
 321       lmm_variable_free(network_im_maxmin_system,
 322                         ((surf_action_network_CM02_im_t) action)->variable);
 323     }
 324     if(network_update_mechanism == UM_LAZY){// remove action from the heap
 325       heap_remove((surf_action_network_CM02_im_t) action);
 326       xbt_swag_remove(action, im_net_modified_set);
 327     }
 328 #ifdef HAVE_TRACING
 329     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 330     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 331     xbt_free(action->category);
 332 #endif
 333     surf_action_free(&action);
 334     return 1;
 335   }
 336   return 0;
 337 }
 338
 339
 340
 341 static void im_net_action_cancel(surf_action_t action)
 342 {
 343   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 344   if(network_update_mechanism == UM_LAZY){// remove action from the heap
 345     xbt_swag_remove(action, im_net_modified_set);
 346     heap_remove((surf_action_network_CM02_im_t) action);
 347   }
 348 }
 349
 350 void im_net_action_recycle(surf_action_t action)
 351 {
 352   return;
 353 }
 354
 355 #ifdef HAVE_LATENCY_BOUND_TRACKING
 356 static int im_net_get_link_latency_limited(surf_action_t action)
 357 {
 358   return action->latency_limited;
 359 }
 360 #endif
 361
 362 double im_net_action_get_remains(surf_action_t action)
 363 {
 364   if(network_update_mechanism == UM_LAZY)/* update remains before return it */
 365     update_action_remaining(surf_get_clock());
 366   return action->remains;
 367 }
 368
 369 static void update_action_remaining(double now){
 370   surf_action_network_CM02_im_t action = NULL;
 371   double delta = 0.0;
 372
 373   xbt_swag_foreach(action, im_net_modified_set) {
 374
 375     if(action->suspended != 0){
 376         continue;
 377     }
 378
 379     delta = now - action->last_update;
 380
 381     double_update(&(action->generic_action.remains),
 382                   lmm_variable_getvalue(action->variable) * delta);
 383
 384     if (action->generic_action.max_duration != NO_MAX_DURATION)
 385       double_update(&(action->generic_action.max_duration), delta);
 386
 387     if ((action->generic_action.remains <= 0) &&
 388         (lmm_get_variable_weight(action->variable) > 0)) {
 389       action->generic_action.finish = surf_get_clock();
 390       surf_network_model->action_state_set((surf_action_t) action,
 391                                            SURF_ACTION_DONE);
 392       heap_remove(action);
 393     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 394                && (action->generic_action.max_duration <= 0)) {
 395       action->generic_action.finish = surf_get_clock();
 396       surf_network_model->action_state_set((surf_action_t) action,
 397                                            SURF_ACTION_DONE);
 398       heap_remove(action);
 399     }
 400
 401     action->last_update = now;
 402   }
 403 }
 404
 405 static double net_share_resources(double now)
 406 {
 407   s_surf_action_network_CM02_im_t s_action;
 408   surf_action_network_CM02_im_t action = NULL;
 409   xbt_swag_t running_actions =
 410       surf_network_model->states.running_action_set;
 411   double min;
 412
 413   min = generic_maxmin_share_resources(running_actions,
 414                                        xbt_swag_offset(s_action,
 415                                                        variable),
 416                                        network_im_maxmin_system,
 417                                        network_im_solve);
 418
 419 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 420
 421   xbt_swag_foreach(action, running_actions) {
 422 #ifdef HAVE_LATENCY_BOUND_TRACKING
 423     if (lmm_is_variable_limited_by_latency(action->variable)) {
 424       (action->generic_action).latency_limited = 1;
 425     } else {
 426       (action->generic_action).latency_limited = 0;
 427     }
 428 #endif
 429     if (action->latency > 0) {
 430       if (min < 0)
 431         min = action->latency;
 432       else if (action->latency < min)
 433         min = action->latency;
 434     }
 435   }
 436
 437   XBT_DEBUG("Min of share resources %f", min);
 438
 439   return min;
 440 }
 441
 442 static double im_net_share_resources(double now)
 443 {
 444   surf_action_network_CM02_im_t action = NULL;
 445   double min=-1;
 446   double value;
 447
 448   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 449   update_action_remaining(now);
 450
 451   keep_track = im_net_modified_set;
 452   lmm_solve(network_im_maxmin_system);
 453   keep_track = NULL;
 454
 455   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 456
 457    xbt_swag_foreach(action, im_net_modified_set) {
 458      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 459        continue;
 460      }
 461
 462      /* bogus priority, skip it */
 463      if (GENERIC_ACTION(action).priority <= 0){
 464          continue;
 465      }
 466
 467      min = -1;
 468      value = lmm_variable_getvalue(action->variable);
 469      if (value > 0) {
 470          if (GENERIC_ACTION(action).remains > 0) {
 471              value = GENERIC_ACTION(action).remains / value;
 472              min = now + value;
 473          } else {
 474              value = 0.0;
 475              min = now;
 476          }
 477      }
 478
 479      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 480          && (min == -1
 481              || GENERIC_ACTION(action).start +
 482              GENERIC_ACTION(action).max_duration < min)){
 483        min =   GENERIC_ACTION(action).start +
 484                GENERIC_ACTION(action).max_duration;
 485      }
 486
 487      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 488                 GENERIC_ACTION(action).start, now + value,
 489                 GENERIC_ACTION(action).max_duration);
 490
 491
 492
 493      if (action->index_heap >= 0) {
 494          heap_remove((surf_action_network_CM02_im_t) action);
 495      }
 496
 497      if (min != -1) {
 498          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 499          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 500      }
 501    }
 502
 503    //hereafter must have already the min value for this resource model
 504    if(xbt_heap_size(im_net_action_heap) > 0 ){
 505        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 506    }else{
 507        min = -1;
 508    }
 509
 510    XBT_DEBUG("The minimum with the HEAP %lf", min);
 511
 512
 513   return min;
 514 }
 515
 516 static double generic_net_share_resources(double now)
 517 {
 518   if(network_update_mechanism == UM_LAZY)
 519     return im_net_share_resources(now);
 520   else if (network_update_mechanism == UM_FULL)
 521   {
 522     return net_share_resources(now);
 523   } else {
 524     xbt_die("Invalide update mechanism!");
 525     return 0;
 526   }
 527 }
 528
 529 static void net_update_actions_state(double now, double delta)
 530 {
 531   double deltap = 0.0;
 532   surf_action_network_CM02_im_t action = NULL;
 533   surf_action_network_CM02_im_t next_action = NULL;
 534   xbt_swag_t running_actions =
 535       surf_network_model->states.running_action_set;
 536   /*
 537      xbt_swag_t failed_actions =
 538      surf_network_model->states.failed_action_set;
 539    */
 540
 541   xbt_swag_foreach_safe(action, next_action, running_actions) {
 542     deltap = delta;
 543     if (action->latency > 0) {
 544       if (action->latency > deltap) {
 545         double_update(&(action->latency), deltap);
 546         deltap = 0.0;
 547       } else {
 548         double_update(&(deltap), action->latency);
 549         action->latency = 0.0;
 550       }
 551       if ((action->latency == 0.0) && !(action->suspended))
 552         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 553                                    action->weight);
 554     }
 555 #ifdef HAVE_TRACING
 556     if (TRACE_is_enabled()) {
 557       xbt_dynar_t route=NULL;
 558       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 559       link_CM02_im_t link;
 560       unsigned int i;
 561       xbt_dynar_foreach(route, i, link) {
 562         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 563                                         action->generic_action.data,
 564                                         (surf_action_t) action,
 565                                         lmm_variable_getvalue
 566                                         (action->variable), now - delta,
 567                                         delta);
 568       }
 569     }
 570 #endif
 571     if(!lmm_get_number_of_cnst_from_var(network_im_maxmin_system, action->variable)) {
 572         /* There is actually no link used, hence an infinite bandwidth.
 573          * This happens often when using models like vivaldi.
 574          * In such case, just make sure that the action completes immediately.
 575          */
 576       double_update(&(action->generic_action.remains),
 577           action->generic_action.remains);
 578     }
 579     double_update(&(action->generic_action.remains),
 580                   lmm_variable_getvalue(action->variable) * deltap);
 581     if (action->generic_action.max_duration != NO_MAX_DURATION)
 582       double_update(&(action->generic_action.max_duration), delta);
 583
 584     if ((action->generic_action.remains <= 0) &&
 585         (lmm_get_variable_weight(action->variable) > 0)) {
 586       action->generic_action.finish = surf_get_clock();
 587       surf_network_model->action_state_set((surf_action_t) action,
 588                                            SURF_ACTION_DONE);
 589 #ifdef HAVE_SMPI
 590       gap_remove(action);
 591 #endif
 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 #ifdef HAVE_SMPI
 598       gap_remove(action);
 599 #endif
 600     }
 601   }
 602
 603   return;
 604 }
 605
 606 static void im_net_update_actions_state(double now, double delta)
 607 {
 608   surf_action_network_CM02_im_t action = NULL;
 609
 610   while ((xbt_heap_size(im_net_action_heap) > 0)
 611          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 612     action = xbt_heap_pop(im_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 heat
 617     if( action->hat ==  LATENCY){
 618         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 619                                            action->weight);
 620         heap_remove(action);
 621         action->last_update = surf_get_clock();
 622
 623         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 624 #ifdef HAVE_LATENCY_BOUND_TRACKING
 625           GENERIC_ACTION(action).latency_limited = 0;
 626 #endif
 627
 628     // if I am wearing a max_duration or normal hat
 629     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 630         // no need to communicate anymore
 631         // assume that flows that reached max_duration have remaining of 0
 632         GENERIC_ACTION(action).remains = 0;
 633         action->generic_action.finish = surf_get_clock();
 634               surf_network_model->action_state_set((surf_action_t) action,
 635                                                    SURF_ACTION_DONE);
 636         heap_remove(action);
 637     }
 638   }
 639   return;
 640 }
 641
 642 static void generic_net_update_actions_state(double now, double delta)
 643 {
 644   if(network_update_mechanism == UM_LAZY)
 645     im_net_update_actions_state(now,delta);
 646   else if (network_update_mechanism == UM_FULL)
 647   {
 648     net_update_actions_state(now,delta);
 649   } else {
 650     xbt_die("Invalide update mechanism!");
 651   }
 652 }
 653
 654 static void im_net_update_resource_state(void *id,
 655                                       tmgr_trace_event_t event_type,
 656                                       double value, double date)
 657 {
 658   link_CM02_im_t nw_link = id;
 659   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 660   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 661   /*     value, event_type); */
 662
 663   if (event_type == nw_link->lmm_resource.power.event) {
 664     double delta =
 665         sg_weight_S_parameter / value - sg_weight_S_parameter /
 666         (nw_link->lmm_resource.power.peak *
 667          nw_link->lmm_resource.power.scale);
 668     lmm_variable_t var = NULL;
 669     lmm_element_t elem = NULL;
 670     surf_action_network_CM02_im_t action = NULL;
 671
 672     nw_link->lmm_resource.power.peak = value;
 673     lmm_update_constraint_bound(network_im_maxmin_system,
 674                                 nw_link->lmm_resource.constraint,
 675                                 sg_bandwidth_factor *
 676                                 (nw_link->lmm_resource.power.peak *
 677                                  nw_link->lmm_resource.power.scale));
 678 #ifdef HAVE_TRACING
 679     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 680                                   sg_bandwidth_factor *
 681                                   (nw_link->lmm_resource.power.peak *
 682                                    nw_link->lmm_resource.power.scale));
 683 #endif
 684     if (sg_weight_S_parameter > 0) {
 685       while ((var = lmm_get_var_from_cnst
 686               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 687                &elem))) {
 688         action = lmm_variable_id(var);
 689         action->weight += delta;
 690         if (!(action->suspended))
 691           lmm_update_variable_weight(network_im_maxmin_system,
 692                                      action->variable, action->weight);
 693       }
 694     }
 695     if (tmgr_trace_event_free(event_type))
 696       nw_link->lmm_resource.power.event = NULL;
 697   } else if (event_type == nw_link->lat_event) {
 698     double delta = value - nw_link->lat_current;
 699     lmm_variable_t var = NULL;
 700     lmm_element_t elem = NULL;
 701     surf_action_network_CM02_im_t action = NULL;
 702
 703     nw_link->lat_current = value;
 704     while ((var = lmm_get_var_from_cnst
 705             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 706              &elem))) {
 707       action = lmm_variable_id(var);
 708       action->lat_current += delta;
 709       action->weight += delta;
 710       if (action->rate < 0)
 711         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 712                                   sg_tcp_gamma / (2.0 *
 713                                                   action->lat_current));
 714       else {
 715         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 716                                   min(action->rate,
 717                                       sg_tcp_gamma / (2.0 *
 718                                                       action->lat_current)));
 719
 720         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 721           XBT_INFO("Flow is limited BYBANDWIDTH");
 722         } else {
 723           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 724                 action->lat_current);
 725         }
 726       }
 727       if (!(action->suspended))
 728         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 729                                    action->weight);
 730
 731     }
 732     if (tmgr_trace_event_free(event_type))
 733       nw_link->lat_event = NULL;
 734   } else if (event_type == nw_link->lmm_resource.state_event) {
 735     if (value > 0)
 736       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 737     else {
 738       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 739       lmm_variable_t var = NULL;
 740       lmm_element_t elem = NULL;
 741
 742       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 743       while ((var = lmm_get_var_from_cnst
 744               (network_im_maxmin_system, cnst, &elem))) {
 745         surf_action_t action = lmm_variable_id(var);
 746
 747         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 748             surf_action_state_get(action) == SURF_ACTION_READY) {
 749           action->finish = date;
 750           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 751         }
 752       }
 753     }
 754     if (tmgr_trace_event_free(event_type))
 755       nw_link->lmm_resource.state_event = NULL;
 756   } else {
 757     XBT_CRITICAL("Unknown event ! \n");
 758     xbt_abort();
 759   }
 760
 761   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 762   return;
 763 }
 764
 765
 766 static surf_action_t im_net_communicate(const char *src_name,
 767                                      const char *dst_name, double size,
 768                                      double rate)
 769 {
 770   unsigned int i;
 771   link_CM02_im_t link;
 772   int failed = 0;
 773   surf_action_network_CM02_im_t action = NULL;
 774   double bandwidth_bound;
 775   double latency=0.0;
 776   /* LARGE PLATFORMS HACK:
 777      Add a link_CM02_im_t *link and a int link_nb to network_card_CM02_im_t. It will represent local links for this node
 778      Use the cluster_id for ->id */
 779
 780   xbt_dynar_t back_route = NULL;
 781   int constraints_per_variable = 0;
 782   // I need to have the forward and backward routes at the same time, so allocate "route". That way, the routing wont clean it up
 783   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 784   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 785
 786   if (sg_network_crosstraffic == 1) {
 787     // FIXME: fill route directly (unclear: check with blame who put the FIXME)
 788     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 789   }
 790
 791   /* LARGE PLATFORMS HACK:
 792      total_route_size = route_size + src->link_nb + dst->nb */
 793
 794   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 795   /* LARGE PLATFORMS HACK:
 796      assert on total_route_size */
 797   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 798               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 799               src_name, dst_name);
 800
 801   xbt_dynar_foreach(route, i, link) {
 802     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 803       failed = 1;
 804       break;
 805     }
 806   }
 807   if (sg_network_crosstraffic == 1) {
 808     xbt_dynar_foreach(back_route, i, link) {
 809       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 810         failed = 1;
 811         break;
 812       }
 813     }
 814   }
 815
 816   action =
 817       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 818                       surf_network_model, failed);
 819 #ifdef HAVE_LATENCY_BOUND_TRACKING
 820   (action->generic_action).latency_limited = 0;
 821 #endif
 822   action->weight = action->latency = latency;
 823
 824   xbt_swag_insert(action, action->generic_action.state_set);
 825   action->rate = rate;
 826   if(network_update_mechanism == UM_LAZY){
 827     action->index_heap = -1;
 828     action->latency = 0.0;
 829     action->weight = 0.0;
 830     action->last_update = surf_get_clock();
 831   }
 832
 833   bandwidth_bound = -1.0;
 834   xbt_dynar_foreach(route, i, link) {
 835     action->weight +=
 836         sg_weight_S_parameter /
 837         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 838     if (bandwidth_bound < 0.0)
 839       bandwidth_bound =
 840           im_bandwidth_factor_callback(size) *
 841           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 842     else
 843       bandwidth_bound =
 844           min(bandwidth_bound,
 845               im_bandwidth_factor_callback(size) *
 846               (link->lmm_resource.power.peak *
 847                link->lmm_resource.power.scale));
 848   }
 849   /* LARGE PLATFORMS HACK:
 850      Add src->link and dst->link latencies */
 851   action->lat_current = action->latency;
 852   action->latency *= im_latency_factor_callback(size);
 853   action->rate =
 854       im_bandwidth_constraint_callback(action->rate, bandwidth_bound,
 855                                         size);
 856 #ifdef HAVE_SMPI
 857   if(!xbt_dynar_is_empty(route)) {
 858     link = *(link_CM02_im_t*)xbt_dynar_get_ptr(route, 0);
 859     gap_append(size, link, action);
 860     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 861            action, src_name, dst_name, action->sender.gap, action->latency);
 862   } else {
 863     gap_unknown(action);
 864   }
 865 #endif
 866
 867   /* LARGE PLATFORMS HACK:
 868      lmm_variable_new(..., total_route_size) */
 869   if (back_route != NULL) {
 870     constraints_per_variable =
 871         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 872   } else {
 873     constraints_per_variable = xbt_dynar_length(route);
 874   }
 875
 876   if (action->latency > 0){
 877       action->variable =
 878         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 879                          constraints_per_variable);
 880     if(network_update_mechanism == UM_LAZY){
 881       // add to the heap the event when the latency is payed
 882       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 883       heap_insert(action, action->latency + action->last_update, LATENCY);
 884     }
 885 #ifdef HAVE_LATENCY_BOUND_TRACKING
 886         (action->generic_action).latency_limited = 1;
 887 #endif
 888   }
 889   else
 890     action->variable =
 891         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 892                          constraints_per_variable);
 893
 894   if (action->rate < 0) {
 895     if (action->lat_current > 0)
 896       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 897                                 sg_tcp_gamma / (2.0 *
 898                                                 action->lat_current));
 899     else
 900       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 901                                 -1.0);
 902   } else {
 903     if (action->lat_current > 0)
 904       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 905                                 min(action->rate,
 906                                     sg_tcp_gamma / (2.0 *
 907                                                     action->lat_current)));
 908     else
 909       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 910                                 action->rate);
 911   }
 912
 913   xbt_dynar_foreach(route, i, link) {
 914     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 915                action->variable, 1.0);
 916   }
 917
 918   if (sg_network_crosstraffic == 1) {
 919     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 920     xbt_dynar_foreach(back_route, i, link) {
 921       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 922                  action->variable, .05);
 923     }
 924   }
 925
 926   /* LARGE PLATFORMS HACK:
 927      expand also with src->link and dst->link */
 928 #ifdef HAVE_TRACING
 929   if (TRACE_is_enabled()) {
 930     action->src_name = xbt_strdup(src_name);
 931     action->dst_name = xbt_strdup(dst_name);
 932   } else {
 933     action->src_name = action->dst_name = NULL;
 934   }
 935 #endif
 936
 937   xbt_dynar_free(&route);
 938   XBT_OUT();
 939
 940   return (surf_action_t) action;
 941 }
 942
 943 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 944 {
 945   xbt_dynar_t route=NULL;
 946   routing_get_route_and_latency(src, dst,&route,NULL);
 947   return route;
 948 }
 949
 950 static double im_net_get_link_bandwidth(const void *link)
 951 {
 952   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 953   return lmm->power.peak * lmm->power.scale;
 954 }
 955
 956 static double im_net_get_link_latency(const void *link)
 957 {
 958   return ((link_CM02_im_t) link)->lat_current;
 959 }
 960
 961 static int im_net_link_shared(const void *link)
 962 {
 963   return
 964       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 965 }
 966
 967 static void im_net_action_suspend(surf_action_t action)
 968 {
 969   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 970   lmm_update_variable_weight(network_im_maxmin_system,
 971                              ((surf_action_network_CM02_im_t)
 972                               action)->variable, 0.0);
 973
 974   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 975     heap_remove((surf_action_network_CM02_im_t) action);
 976 }
 977
 978 static void im_net_action_resume(surf_action_t action)
 979 {
 980   if (((surf_action_network_CM02_im_t) action)->suspended) {
 981     lmm_update_variable_weight(network_im_maxmin_system,
 982                                ((surf_action_network_CM02_im_t)
 983                                 action)->variable,
 984                                ((surf_action_network_CM02_im_t)
 985                                 action)->weight);
 986     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 987     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 988       heap_remove((surf_action_network_CM02_im_t) action);
 989   }
 990 }
 991
 992 static int im_net_action_is_suspended(surf_action_t action)
 993 {
 994   return ((surf_action_network_CM02_im_t) action)->suspended;
 995 }
 996
 997 void im_net_action_set_max_duration(surf_action_t action, double duration)
 998 {
 999   action->max_duration = duration;
1000   if(network_update_mechanism == UM_LAZY)// remove action from the heap
1001     heap_remove((surf_action_network_CM02_im_t) action);
1002 }
1003
1004 #ifdef HAVE_TRACING
1005 static void net_action_set_category(surf_action_t action, const char *category)
1006 {
1007   action->category = xbt_strdup (category);
1008 }
1009 #endif
1010
1011 static void im_net_finalize(void)
1012 {
1013   surf_model_exit(surf_network_model);
1014   surf_network_model = NULL;
1015
1016   lmm_system_free(network_im_maxmin_system);
1017   network_im_maxmin_system = NULL;
1018
1019   if(network_update_mechanism == UM_LAZY){
1020     xbt_heap_free(im_net_action_heap);
1021     xbt_swag_free(im_net_modified_set);
1022   }
1023 }
1024
1025 #ifdef HAVE_SMPI
1026 static void gap_append(double size, const link_CM02_im_t link, surf_action_network_CM02_im_t action) {
1027    const char* src = link->lmm_resource.generic_resource.name;
1028    xbt_fifo_t fifo;
1029    surf_action_network_CM02_im_t last_action;
1030    double bw;
1031
1032    if(sg_sender_gap > 0.0) {
1033       if(!gap_lookup) {
1034          gap_lookup = xbt_dict_new();
1035       }
1036       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
1037       action->sender.gap = 0.0;
1038       if(fifo && xbt_fifo_size(fifo) > 0) {
1039          /* Compute gap from last send */
1040          last_action = (surf_action_network_CM02_im_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1041          bw = im_net_get_link_bandwidth(link);
1042          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
1043          action->latency += action->sender.gap;
1044       }
1045       /* Append action as last send */
1046       action->sender.link_name = link->lmm_resource.generic_resource.name;
1047       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1048       if(!fifo) {
1049          fifo = xbt_fifo_new();
1050          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1051       }
1052       action->sender.fifo_item = xbt_fifo_push(fifo, action);
1053       action->sender.size = size;
1054    }
1055 }
1056
1057 static void gap_unknown(surf_action_network_CM02_im_t action) {
1058    action->sender.gap = 0.0;
1059    action->sender.link_name = NULL;
1060    action->sender.fifo_item = NULL;
1061    action->sender.size = 0.0;
1062 }
1063
1064 static void gap_remove(surf_action_network_CM02_im_t action) {
1065    xbt_fifo_t fifo;
1066    size_t size;
1067
1068    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1069       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1070       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1071       size = xbt_fifo_size(fifo);
1072       if(size == 0) {
1073          xbt_fifo_free(fifo);
1074          xbt_dict_remove(gap_lookup, action->sender.link_name);
1075          size = xbt_dict_length(gap_lookup);
1076          if(size == 0) {
1077             xbt_dict_free(&gap_lookup);
1078          }
1079       }
1080    }
1081 }
1082 #endif
1083
1084 static void im_surf_network_model_init_internal(void)
1085 {
1086   s_surf_action_network_CM02_im_t comm;
1087
1088   surf_network_model = surf_model_init();
1089
1090   surf_network_model->name = "network";
1091   surf_network_model->action_unref = im_net_action_unref;
1092   surf_network_model->action_cancel = im_net_action_cancel;
1093   surf_network_model->action_recycle = im_net_action_recycle;
1094   surf_network_model->get_remains = im_net_action_get_remains;
1095 #ifdef HAVE_LATENCY_BOUND_TRACKING
1096   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
1097 #endif
1098
1099   surf_network_model->model_private->resource_used = im_net_resource_used;
1100   surf_network_model->model_private->share_resources = generic_net_share_resources;
1101   surf_network_model->model_private->update_actions_state =
1102       generic_net_update_actions_state;
1103   surf_network_model->model_private->update_resource_state =
1104                   im_net_update_resource_state;
1105   surf_network_model->model_private->finalize = im_net_finalize;
1106
1107   surf_network_model->suspend = im_net_action_suspend;
1108   surf_network_model->resume = im_net_action_resume;
1109   surf_network_model->is_suspended = im_net_action_is_suspended;
1110   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
1111
1112   surf_network_model->extension.network.communicate = im_net_communicate;
1113   surf_network_model->extension.network.get_route = im_net_get_route;
1114   surf_network_model->extension.network.get_link_bandwidth =
1115                   im_net_get_link_bandwidth;
1116   surf_network_model->extension.network.get_link_latency =
1117                   im_net_get_link_latency;
1118   surf_network_model->extension.network.link_shared = im_net_link_shared;
1119   surf_network_model->extension.network.add_traces = im_net_add_traces;
1120   surf_network_model->extension.network.create_resource =
1121                   im_net_create_resource;
1122
1123   if (!network_im_maxmin_system)
1124     network_im_maxmin_system = lmm_system_new();
1125
1126  routing_model_create(sizeof(link_CM02_im_t),
1127       im_net_create_resource("__loopback__",
1128           498000000, NULL, 0.000015, NULL,
1129           SURF_RESOURCE_ON, NULL,
1130           SURF_LINK_FATPIPE, NULL));
1131
1132   if(network_update_mechanism == UM_LAZY){
1133     sg_maxmin_selective_update = 1;
1134     im_net_action_heap = xbt_heap_new(8,NULL);
1135     xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
1136     im_net_modified_set =
1137         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1138   }
1139 }
1140
1141 static void set_update_mechanism(void) {
1142   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1143
1144   if(!strcmp(optim,"Full")) {
1145     network_update_mechanism = UM_FULL;
1146   } else if (!strcmp(optim,"Lazy")) {
1147     network_update_mechanism = UM_LAZY;
1148   } else {
1149     xbt_die("Unsupported optimization (%s) for this model",optim);
1150   }
1151 }
1152
1153 /************************************************************************/
1154 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1155 /************************************************************************/
1156 void surf_network_model_init_SMPI(void)
1157 {
1158
1159   if (surf_network_model)
1160     return;
1161   set_update_mechanism();
1162
1163   im_surf_network_model_init_internal();
1164   im_latency_factor_callback = &smpi_latency_factor;
1165   im_bandwidth_factor_callback = &smpi_bandwidth_factor;
1166   im_bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1167   im_net_define_callbacks();
1168   xbt_dynar_push(model_list, &surf_network_model);
1169   network_im_solve = lmm_solve;
1170
1171   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1172   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1173 }
1174
1175 /************************************************************************/
1176 /* New model based on optimizations discussed during this thesis        */
1177 /************************************************************************/
1178 void im_surf_network_model_init_LegrandVelho(void)
1179 {
1180   char *model = xbt_cfg_get_string(_surf_cfg_set, "network/model");
1181
1182   if (surf_network_model)
1183     return;
1184
1185   if(!strcmp(model,"LV08_fullupdate")) {
1186     XBT_WARN("[*Deprecated*. Use --cfg=network/model:LV08 with option --cfg=network/optim:Full instead.]");
1187   }
1188   set_update_mechanism();
1189
1190   im_surf_network_model_init_internal();
1191   im_net_define_callbacks();
1192   xbt_dynar_push(model_list, &surf_network_model);
1193   network_im_solve = lmm_solve;
1194
1195   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4); // 13.01 when callibration is done without phase effects
1196   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.92);// 0.97 when callibration is done without phase effects
1197   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);       // 20537 when callibration is done without phase effects
1198 }
1199
1200 /***************************************************************************/
1201 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1202 /***************************************************************************/
1203 /* @TechReport{      rr-lip2002-40, */
1204 /*   author        = {Henri Casanova and Loris Marchal}, */
1205 /*   institution   = {LIP}, */
1206 /*   title         = {A Network Model for Simulation of Grid Application}, */
1207 /*   number        = {2002-40}, */
1208 /*   month         = {oct}, */
1209 /*   year          = {2002} */
1210 /* } */
1211 void surf_network_model_init_CM02(void)
1212 {
1213
1214   if (surf_network_model)
1215     return;
1216
1217   set_update_mechanism();
1218   im_surf_network_model_init_internal();
1219   im_net_define_callbacks();
1220   xbt_dynar_push(model_list, &surf_network_model);
1221   network_im_solve = lmm_solve;
1222
1223   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1224   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1225   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1226 }
1227
1228 void surf_network_model_init_Reno(void)
1229 {
1230   if (surf_network_model)
1231     return;
1232
1233   set_update_mechanism();
1234   im_surf_network_model_init_internal();
1235   im_net_define_callbacks();
1236
1237   xbt_dynar_push(model_list, &surf_network_model);
1238   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1239                                     func_reno_fpi);
1240   network_im_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", 8775);
1246 }
1247
1248
1249 void surf_network_model_init_Reno2(void)
1250 {
1251   if (surf_network_model)
1252     return;
1253
1254   set_update_mechanism();
1255   im_surf_network_model_init_internal();
1256   im_net_define_callbacks();
1257
1258   xbt_dynar_push(model_list, &surf_network_model);
1259   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1260                                     func_reno2_fpi);
1261   network_im_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_parameter",
1267                             8775);
1268 }
1269
1270 void surf_network_model_init_Vegas(void)
1271 {
1272   if (surf_network_model)
1273     return;
1274
1275   set_update_mechanism();
1276   im_surf_network_model_init_internal();
1277   im_net_define_callbacks();
1278
1279   xbt_dynar_push(model_list, &surf_network_model);
1280   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1281                                     func_vegas_fpi);
1282   network_im_solve = lagrange_solve;
1283
1284   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1285   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1286                             0.92);
1287   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1288 }