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_lazy(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,
  78                         enum heap_action_type hat)
  79 {
  80   action->hat = hat;
  81   xbt_heap_push(net_action_heap, action, key);
  82 }
  83
  84 static void heap_remove(surf_action_network_CM02_t action)
  85 {
  86   action->hat = NOTSET;
  87   if (((surf_action_network_CM02_t) action)->index_heap >= 0) {
  88     xbt_heap_remove(net_action_heap, action->index_heap);
  89   }
  90 }
  91
  92 /******************************************************************************/
  93 /*                           Factors callbacks                                */
  94 /******************************************************************************/
  95 static double constant_latency_factor(double size)
  96 {
  97   return sg_latency_factor;
  98 }
  99
 100 static double constant_bandwidth_factor(double size)
 101 {
 102   return sg_bandwidth_factor;
 103 }
 104
 105 static double constant_bandwidth_constraint(double rate, double bound,
 106                                             double size)
 107 {
 108   return rate;
 109 }
 110
 111 /**********************/
 112 /*   SMPI callbacks   */
 113 /**********************/
 114 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 115 {
 116   char *value = NULL;
 117   unsigned int iter = 0;
 118   s_smpi_factor_t fact;
 119   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 120
 121   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 122   radical_elements = xbt_str_split(smpi_coef_string, ";");
 123   xbt_dynar_foreach(radical_elements, iter, value) {
 124
 125     radical_elements2 = xbt_str_split(value, ":");
 126     if (xbt_dynar_length(radical_elements2) != 2)
 127       xbt_die("Malformed radical for smpi factor!");
 128     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 129     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 130     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 131     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 132     xbt_dynar_free(&radical_elements2);
 133   }
 134   xbt_dynar_free(&radical_elements);
 135   return smpi_factor;
 136 }
 137
 138 static double smpi_bandwidth_factor(double size)
 139 {
 140   if (!smpi_bw_factor)
 141     smpi_bw_factor =
 142         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 143
 144   unsigned int iter = 0;
 145   s_smpi_factor_t fact;
 146   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 147     if (size >= fact.factor) {
 148       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 149       return fact.value;
 150     }
 151   }
 152
 153   return 1.0;
 154 }
 155
 156 static double smpi_latency_factor(double size)
 157 {
 158   if (!smpi_lat_factor)
 159     smpi_lat_factor =
 160         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 161
 162   unsigned int iter = 0;
 163   s_smpi_factor_t fact;
 164   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 165     if (size >= fact.factor) {
 166       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 167       return fact.value;
 168     }
 169   }
 170
 171   return 1.0;
 172 }
 173
 174 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 175
 176 static double smpi_bandwidth_constraint(double rate, double bound,
 177                                         double size)
 178 {
 179   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 180 }
 181
 182 static double (*latency_factor_callback) (double) =
 183     &constant_latency_factor;
 184 static double (*bandwidth_factor_callback) (double) =
 185     &constant_bandwidth_factor;
 186 static double (*bandwidth_constraint_callback) (double, double, double) =
 187     &constant_bandwidth_constraint;
 188
 189 static void (*gap_append) (double, const link_CM02_t,
 190                            surf_action_network_CM02_t) = NULL;
 191 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 192
 193 static void *net_create_resource(const char *name,
 194                                  double bw_initial,
 195                                  tmgr_trace_t bw_trace,
 196                                  double lat_initial,
 197                                  tmgr_trace_t lat_trace,
 198                                  e_surf_resource_state_t
 199                                  state_initial,
 200                                  tmgr_trace_t state_trace,
 201                                  e_surf_link_sharing_policy_t
 202                                  policy, xbt_dict_t properties)
 203 {
 204   link_CM02_t nw_link = (link_CM02_t)
 205       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 206                             surf_network_model, name, properties,
 207                             network_maxmin_system,
 208                             sg_bandwidth_factor * bw_initial,
 209                             history,
 210                             state_initial, state_trace,
 211                             bw_initial, bw_trace);
 212
 213   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 214              "Link '%s' declared several times in the platform file.",
 215              name);
 216
 217   nw_link->lat_current = lat_initial;
 218   if (lat_trace)
 219     nw_link->lat_event =
 220         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 221
 222   if (policy == SURF_LINK_FATPIPE)
 223     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 224
 225   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 226
 227   return nw_link;
 228 }
 229
 230 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 231 {
 232   if (link->policy == SURF_LINK_FULLDUPLEX) {
 233     char *link_id;
 234     link_id = bprintf("%s_UP", link->id);
 235     net_create_resource(link_id,
 236                         link->bandwidth,
 237                         link->bandwidth_trace,
 238                         link->latency,
 239                         link->latency_trace,
 240                         link->state,
 241                         link->state_trace, link->policy, link->properties);
 242     xbt_free(link_id);
 243     link_id = bprintf("%s_DOWN", link->id);
 244     net_create_resource(link_id,
 245                         link->bandwidth,
 246                         link->bandwidth_trace,
 247                         link->latency,
 248                         link->latency_trace,
 249                         link->state,
 250                         link->state_trace, link->policy, link->properties);
 251     xbt_free(link_id);
 252   } else {
 253     net_create_resource(link->id,
 254                         link->bandwidth,
 255                         link->bandwidth_trace,
 256                         link->latency,
 257                         link->latency_trace,
 258                         link->state,
 259                         link->state_trace, link->policy, 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 = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 277
 278     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 279                trace_name, elm);
 280     xbt_assert(trace,
 281                "Cannot connect trace %s to link %s: trace undefined",
 282                trace_name, elm);
 283
 284     link->lmm_resource.state_event =
 285         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 286   }
 287
 288   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 289     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 290     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 291
 292     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 293                trace_name, elm);
 294     xbt_assert(trace,
 295                "Cannot connect trace %s to link %s: trace undefined",
 296                trace_name, elm);
 297
 298     link->lmm_resource.power.event =
 299         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 300   }
 301
 302   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 303     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 304     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 305
 306     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 307                trace_name, elm);
 308     xbt_assert(trace,
 309                "Cannot connect trace %s to link %s: trace undefined",
 310                trace_name, elm);
 311
 312     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 313   }
 314 }
 315
 316 static void net_define_callbacks(void)
 317 {
 318   /* Figuring out the network links */
 319   sg_platf_link_add_cb(net_parse_link_init);
 320   sg_platf_postparse_add_cb(net_add_traces);
 321 }
 322
 323 static int net_resource_used(void *resource_id)
 324 {
 325   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 326                                                      resource_id)->
 327                              constraint);
 328 }
 329
 330 static int net_action_unref(surf_action_t action)
 331 {
 332   action->refcount--;
 333   if (!action->refcount) {
 334     xbt_swag_remove(action, action->state_set);
 335     if (((surf_action_network_CM02_t) action)->variable) {
 336       lmm_variable_free(network_maxmin_system,
 337                         ((surf_action_network_CM02_t) action)->variable);
 338     }
 339     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 340       heap_remove((surf_action_network_CM02_t) action);
 341       xbt_swag_remove(action, net_modified_set);
 342     }
 343 #ifdef HAVE_TRACING
 344     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 345     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 346     xbt_free(action->category);
 347 #endif
 348     surf_action_free(&action);
 349     return 1;
 350   }
 351   return 0;
 352 }
 353
 354
 355
 356 static void net_action_cancel(surf_action_t action)
 357 {
 358   XBT_DEBUG("cancel action %p", action);
 359   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 360   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 361     xbt_swag_remove(action, net_modified_set);
 362     heap_remove((surf_action_network_CM02_t) action);
 363   }
 364 }
 365
 366 void net_action_recycle(surf_action_t action)
 367 {
 368   return;
 369 }
 370
 371 #ifdef HAVE_LATENCY_BOUND_TRACKING
 372 int net_get_link_latency_limited(surf_action_t action)
 373 {
 374   return action->latency_limited;
 375 }
 376 #endif
 377
 378 double net_action_get_remains(surf_action_t action)
 379 {
 380   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 381     update_action_remaining_lazy(surf_get_clock());
 382   return action->remains;
 383 }
 384
 385 static void update_action_remaining_lazy(double now)
 386 {
 387   surf_action_network_CM02_t action = NULL;
 388   double delta = 0.0;
 389
 390   xbt_swag_foreach(action, net_modified_set) {
 391
 392     if (action->suspended != 0) {
 393       continue;
 394     }
 395
 396     delta = now - action->last_update;
 397
 398     double_update(&(action->generic_action.remains),
 399                   lmm_variable_getvalue(action->variable) * delta);
 400
 401     if (action->generic_action.max_duration != NO_MAX_DURATION)
 402       double_update(&(action->generic_action.max_duration), delta);
 403
 404     if ((action->generic_action.remains <= 0) &&
 405         (lmm_get_variable_weight(action->variable) > 0)) {
 406       action->generic_action.finish = surf_get_clock();
 407       surf_network_model->action_state_set((surf_action_t) action,
 408                                            SURF_ACTION_DONE);
 409       heap_remove(action);
 410     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 411                && (action->generic_action.max_duration <= 0)) {
 412       action->generic_action.finish = surf_get_clock();
 413       surf_network_model->action_state_set((surf_action_t) action,
 414                                            SURF_ACTION_DONE);
 415       heap_remove(action);
 416     }
 417
 418     action->last_update = now;
 419   }
 420 }
 421
 422 static double net_share_resources_full(double now)
 423 {
 424   s_surf_action_network_CM02_t s_action;
 425   surf_action_network_CM02_t action = NULL;
 426   xbt_swag_t running_actions =
 427       surf_network_model->states.running_action_set;
 428   double min;
 429
 430   min = generic_maxmin_share_resources(running_actions,
 431                                        xbt_swag_offset(s_action,
 432                                                        variable),
 433                                        network_maxmin_system,
 434                                        network_solve);
 435
 436 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 437
 438   xbt_swag_foreach(action, running_actions) {
 439 #ifdef HAVE_LATENCY_BOUND_TRACKING
 440     if (lmm_is_variable_limited_by_latency(action->variable)) {
 441       (action->generic_action).latency_limited = 1;
 442     } else {
 443       (action->generic_action).latency_limited = 0;
 444     }
 445 #endif
 446     if (action->latency > 0) {
 447       min = (min < 0) ? action->latency : min(min, action->latency);
 448     }
 449   }
 450
 451   XBT_DEBUG("Min of share resources %f", min);
 452
 453   return min;
 454 }
 455
 456 static double net_share_resources_lazy(double now)
 457 {
 458   surf_action_network_CM02_t action = NULL;
 459   double min = -1;
 460   double value;
 461
 462   XBT_DEBUG
 463       ("Before share resources, the size of modified actions set is %d",
 464        xbt_swag_size(net_modified_set));
 465   update_action_remaining_lazy(now);
 466
 467   lmm_solve(network_maxmin_system);
 468
 469   XBT_DEBUG
 470       ("After share resources, The size of modified actions set is %d",
 471        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 !=
 477         surf_network_model->states.running_action_set) {
 478       continue;
 479     }
 480
 481     /* bogus priority, skip it */
 482     if (GENERIC_ACTION(action).priority <= 0) {
 483       continue;
 484     }
 485
 486     min = -1;
 487     value = lmm_variable_getvalue(action->variable);
 488     if (value > 0) {
 489       if (GENERIC_ACTION(action).remains > 0) {
 490         value = GENERIC_ACTION(action).remains / value;
 491         min = now + value;
 492       } else {
 493         value = 0.0;
 494         min = now;
 495       }
 496     }
 497
 498     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 499         && (min == -1
 500             || GENERIC_ACTION(action).start +
 501             GENERIC_ACTION(action).max_duration < min)) {
 502       min = GENERIC_ACTION(action).start +
 503           GENERIC_ACTION(action).max_duration;
 504       max_dur_flag = 1;
 505     }
 506
 507     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 508               GENERIC_ACTION(action).start, now + value,
 509               GENERIC_ACTION(action).max_duration);
 510
 511     if (action->index_heap >= 0) {
 512       heap_remove((surf_action_network_CM02_t) action);
 513     }
 514
 515     if (min != -1) {
 516       heap_insert((surf_action_network_CM02_t) action, min,
 517                   max_dur_flag ? MAX_DURATION : NORMAL);
 518       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 519                 now);
 520     }
 521   }
 522
 523   //hereafter must have already the min value for this resource model
 524   if (xbt_heap_size(net_action_heap) > 0) {
 525     min = xbt_heap_maxkey(net_action_heap) - now;
 526   } else {
 527     min = -1;
 528   }
 529
 530   XBT_DEBUG("The minimum with the HEAP %lf", min);
 531
 532   return min;
 533 }
 534
 535 static void net_update_actions_state_full(double now, double delta)
 536 {
 537   double deltap = 0.0;
 538   surf_action_network_CM02_t action = NULL;
 539   surf_action_network_CM02_t next_action = NULL;
 540   xbt_swag_t running_actions =
 541       surf_network_model->states.running_action_set;
 542   /*
 543      xbt_swag_t failed_actions =
 544      surf_network_model->states.failed_action_set;
 545    */
 546
 547   xbt_swag_foreach_safe(action, next_action, running_actions) {
 548     deltap = delta;
 549     if (action->latency > 0) {
 550       if (action->latency > deltap) {
 551         double_update(&(action->latency), deltap);
 552         deltap = 0.0;
 553       } else {
 554         double_update(&(deltap), action->latency);
 555         action->latency = 0.0;
 556       }
 557       if ((action->latency == 0.0) && !(action->suspended))
 558         lmm_update_variable_weight(network_maxmin_system, action->variable,
 559                                    action->weight);
 560     }
 561 #ifdef HAVE_TRACING
 562     if (TRACE_is_enabled()) {
 563       xbt_dynar_t route = NULL;
 564       routing_get_route_and_latency(action->src_name, action->dst_name,
 565                                     &route, NULL);
 566       link_CM02_t link;
 567       unsigned int i;
 568       xbt_dynar_foreach(route, i, link) {
 569         TRACE_surf_link_set_utilization(link->lmm_resource.
 570                                         generic_resource.name,
 571                                         action->generic_action.data,
 572                                         (surf_action_t) action,
 573                                         lmm_variable_getvalue(action->
 574                                                               variable),
 575                                         now - delta, delta);
 576       }
 577     }
 578 #endif
 579     if (!lmm_get_number_of_cnst_from_var
 580         (network_maxmin_system, action->variable)) {
 581       /* There is actually no link used, hence an infinite bandwidth.
 582        * This happens often when using models like vivaldi.
 583        * In such case, just make sure that the action completes immediately.
 584        */
 585       double_update(&(action->generic_action.remains),
 586                     action->generic_action.remains);
 587     }
 588     double_update(&(action->generic_action.remains),
 589                   lmm_variable_getvalue(action->variable) * deltap);
 590     if (action->generic_action.max_duration != NO_MAX_DURATION)
 591       double_update(&(action->generic_action.max_duration), delta);
 592
 593     if ((action->generic_action.remains <= 0) &&
 594         (lmm_get_variable_weight(action->variable) > 0)) {
 595       action->generic_action.finish = surf_get_clock();
 596       surf_network_model->action_state_set((surf_action_t) action,
 597                                            SURF_ACTION_DONE);
 598
 599       if (gap_remove)
 600         gap_remove(action);
 601     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 602                && (action->generic_action.max_duration <= 0)) {
 603       action->generic_action.finish = surf_get_clock();
 604       surf_network_model->action_state_set((surf_action_t) action,
 605                                            SURF_ACTION_DONE);
 606       if (gap_remove)
 607         gap_remove(action);
 608     }
 609   }
 610
 611   return;
 612 }
 613
 614 static void net_update_actions_state_lazy(double now, double delta)
 615 {
 616   surf_action_network_CM02_t action = NULL;
 617
 618   while ((xbt_heap_size(net_action_heap) > 0)
 619          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 620     action = xbt_heap_pop(net_action_heap);
 621     XBT_DEBUG("Action %p: finish", action);
 622     GENERIC_ACTION(action).finish = surf_get_clock();
 623
 624     // if I am wearing a latency hat
 625     if (action->hat == LATENCY) {
 626       lmm_update_variable_weight(network_maxmin_system, action->variable,
 627                                  action->weight);
 628       heap_remove(action);
 629       action->last_update = surf_get_clock();
 630
 631       // if I am wearing a max_duration or normal hat
 632     } else if (action->hat == MAX_DURATION || action->hat == NORMAL) {
 633       // no need to communicate anymore
 634       // assume that flows that reached max_duration have remaining of 0
 635       GENERIC_ACTION(action).remains = 0;
 636       action->generic_action.finish = surf_get_clock();
 637       surf_network_model->action_state_set((surf_action_t) action,
 638                                            SURF_ACTION_DONE);
 639       heap_remove(action);
 640     }
 641   }
 642   return;
 643 }
 644
 645 static void net_update_resource_state(void *id,
 646                                       tmgr_trace_event_t event_type,
 647                                       double value, double date)
 648 {
 649   link_CM02_t nw_link = id;
 650   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 651   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 652   /*     value, event_type); */
 653
 654   if (event_type == nw_link->lmm_resource.power.event) {
 655     double delta =
 656         sg_weight_S_parameter / value - sg_weight_S_parameter /
 657         (nw_link->lmm_resource.power.peak *
 658          nw_link->lmm_resource.power.scale);
 659     lmm_variable_t var = NULL;
 660     lmm_element_t elem = NULL;
 661     surf_action_network_CM02_t action = NULL;
 662
 663     nw_link->lmm_resource.power.peak = value;
 664     lmm_update_constraint_bound(network_maxmin_system,
 665                                 nw_link->lmm_resource.constraint,
 666                                 sg_bandwidth_factor *
 667                                 (nw_link->lmm_resource.power.peak *
 668                                  nw_link->lmm_resource.power.scale));
 669 #ifdef HAVE_TRACING
 670     TRACE_surf_link_set_bandwidth(date,
 671                                   (char
 672                                    *) (((nw_link->lmm_resource).
 673                                         generic_resource).name),
 674                                   sg_bandwidth_factor *
 675                                   (nw_link->lmm_resource.power.peak *
 676                                    nw_link->lmm_resource.power.scale));
 677 #endif
 678     if (sg_weight_S_parameter > 0) {
 679       while ((var = lmm_get_var_from_cnst
 680               (network_maxmin_system, nw_link->lmm_resource.constraint,
 681                &elem))) {
 682         action = lmm_variable_id(var);
 683         action->weight += delta;
 684         if (!(action->suspended))
 685           lmm_update_variable_weight(network_maxmin_system,
 686                                      action->variable, action->weight);
 687       }
 688     }
 689     if (tmgr_trace_event_free(event_type))
 690       nw_link->lmm_resource.power.event = NULL;
 691   } else if (event_type == nw_link->lat_event) {
 692     double delta = value - nw_link->lat_current;
 693     lmm_variable_t var = NULL;
 694     lmm_element_t elem = NULL;
 695     surf_action_network_CM02_t action = NULL;
 696
 697     nw_link->lat_current = value;
 698     while ((var = lmm_get_var_from_cnst
 699             (network_maxmin_system, nw_link->lmm_resource.constraint,
 700              &elem))) {
 701       action = lmm_variable_id(var);
 702       action->lat_current += delta;
 703       action->weight += delta;
 704       if (action->rate < 0)
 705         lmm_update_variable_bound(network_maxmin_system, action->variable,
 706                                   sg_tcp_gamma / (2.0 *
 707                                                   action->lat_current));
 708       else {
 709         lmm_update_variable_bound(network_maxmin_system, action->variable,
 710                                   min(action->rate,
 711                                       sg_tcp_gamma / (2.0 *
 712                                                       action->
 713                                                       lat_current)));
 714
 715         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 716           XBT_INFO("Flow is limited BYBANDWIDTH");
 717         } else {
 718           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 719                    action->lat_current);
 720         }
 721       }
 722       if (!(action->suspended))
 723         lmm_update_variable_weight(network_maxmin_system, action->variable,
 724                                    action->weight);
 725
 726     }
 727     if (tmgr_trace_event_free(event_type))
 728       nw_link->lat_event = NULL;
 729   } else if (event_type == nw_link->lmm_resource.state_event) {
 730     if (value > 0)
 731       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 732     else {
 733       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 734       lmm_variable_t var = NULL;
 735       lmm_element_t elem = NULL;
 736
 737       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 738       while ((var = lmm_get_var_from_cnst
 739               (network_maxmin_system, cnst, &elem))) {
 740         surf_action_t action = lmm_variable_id(var);
 741
 742         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 743             surf_action_state_get(action) == SURF_ACTION_READY) {
 744           action->finish = date;
 745           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 746         }
 747       }
 748     }
 749     if (tmgr_trace_event_free(event_type))
 750       nw_link->lmm_resource.state_event = NULL;
 751   } else {
 752     XBT_CRITICAL("Unknown event ! \n");
 753     xbt_abort();
 754   }
 755
 756   XBT_DEBUG
 757       ("There were a resource state event, need to update actions related to the constraint (%p)",
 758        nw_link->lmm_resource.constraint);
 759   return;
 760 }
 761
 762
 763 static surf_action_t net_communicate(const char *src_name,
 764                                      const char *dst_name, double size,
 765                                      double rate)
 766 {
 767   unsigned int i;
 768   link_CM02_t link;
 769   int failed = 0;
 770   surf_action_network_CM02_t action = NULL;
 771   double bandwidth_bound;
 772   double latency = 0.0;
 773   xbt_dynar_t back_route = NULL;
 774   int constraints_per_variable = 0;
 775
 776   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 777
 778   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 779
 780   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 781   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 782              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 783              src_name, dst_name);
 784
 785   xbt_dynar_foreach(route, i, link) {
 786     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 787       failed = 1;
 788       break;
 789     }
 790   }
 791   if (sg_network_crosstraffic == 1) {
 792     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 793     xbt_dynar_foreach(back_route, i, link) {
 794       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 795         failed = 1;
 796         break;
 797       }
 798     }
 799   }
 800
 801   action =
 802       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 803                       surf_network_model, failed);
 804 #ifdef HAVE_LATENCY_BOUND_TRACKING
 805   (action->generic_action).latency_limited = 0;
 806 #endif
 807   action->weight = action->latency = latency;
 808
 809   xbt_swag_insert(action, action->generic_action.state_set);
 810   action->rate = rate;
 811   if (network_update_mechanism == UM_LAZY) {
 812     action->index_heap = -1;
 813     action->last_update = surf_get_clock();
 814   }
 815
 816   bandwidth_bound = -1.0;
 817   if (sg_weight_S_parameter > 0) {
 818     xbt_dynar_foreach(route, i, link) {
 819       action->weight +=
 820           sg_weight_S_parameter /
 821           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 822     }
 823   }
 824   xbt_dynar_foreach(route, i, link) {
 825     double bb = bandwidth_factor_callback(size) *
 826         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 827     bandwidth_bound =
 828         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 829   }
 830
 831   action->lat_current = action->latency;
 832   action->latency *= latency_factor_callback(size);
 833   action->rate =
 834       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 835   if (gap_append) {
 836     xbt_assert(!xbt_dynar_is_empty(route),
 837                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 838
 839     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 840     gap_append(size, link, action);
 841     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 842               action, src_name, dst_name, action->sender.gap,
 843               action->latency);
 844   }
 845
 846   constraints_per_variable = xbt_dynar_length(route);
 847   if (back_route != NULL)
 848     constraints_per_variable += xbt_dynar_length(back_route);
 849
 850   if (action->latency > 0) {
 851     action->variable =
 852         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 853                          constraints_per_variable);
 854     if (network_update_mechanism == UM_LAZY) {
 855       // add to the heap the event when the latency is payed
 856       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 857                 action->latency + action->last_update);
 858       heap_insert(action, action->latency + action->last_update,
 859                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 860     }
 861   } else
 862     action->variable =
 863         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 864                          constraints_per_variable);
 865
 866   if (action->rate < 0) {
 867     lmm_update_variable_bound(network_maxmin_system, action->variable,
 868                               (action->lat_current > 0) ?
 869                               sg_tcp_gamma / (2.0 *
 870                                               action->lat_current) : -1.0);
 871   } else {
 872     lmm_update_variable_bound(network_maxmin_system, action->variable,
 873                               (action->lat_current > 0) ?
 874                               min(action->rate,
 875                                   sg_tcp_gamma / (2.0 *
 876                                                   action->lat_current))
 877                               : action->rate);
 878   }
 879
 880   xbt_dynar_foreach(route, i, link) {
 881     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 882                action->variable, 1.0);
 883   }
 884
 885   if (sg_network_crosstraffic == 1) {
 886     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 887     xbt_dynar_foreach(back_route, i, link) {
 888       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 889                  action->variable, .05);
 890     }
 891   }
 892 #ifdef HAVE_TRACING
 893   if (TRACE_is_enabled()) {
 894     action->src_name = xbt_strdup(src_name);
 895     action->dst_name = xbt_strdup(dst_name);
 896   } else {
 897     action->src_name = action->dst_name = NULL;
 898   }
 899 #endif
 900
 901   xbt_dynar_free(&route);
 902   XBT_OUT();
 903
 904   return (surf_action_t) action;
 905 }
 906
 907 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 908 {
 909   xbt_dynar_t route = NULL;
 910   routing_get_route_and_latency(src, dst, &route, NULL);
 911   return route;
 912 }
 913
 914 static double net_get_link_bandwidth(const void *link)
 915 {
 916   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 917   return lmm->power.peak * lmm->power.scale;
 918 }
 919
 920 static double net_get_link_latency(const void *link)
 921 {
 922   return ((link_CM02_t) link)->lat_current;
 923 }
 924
 925 static int net_link_shared(const void *link)
 926 {
 927   return
 928       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 929 }
 930
 931 static void net_action_suspend(surf_action_t action)
 932 {
 933   ((surf_action_network_CM02_t) action)->suspended = 1;
 934   lmm_update_variable_weight(network_maxmin_system,
 935                              ((surf_action_network_CM02_t)
 936                               action)->variable, 0.0);
 937
 938   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 939     heap_remove((surf_action_network_CM02_t) action);
 940 }
 941
 942 static void net_action_resume(surf_action_t action)
 943 {
 944   if (((surf_action_network_CM02_t) action)->suspended) {
 945     lmm_update_variable_weight(network_maxmin_system,
 946                                ((surf_action_network_CM02_t)
 947                                 action)->variable,
 948                                ((surf_action_network_CM02_t)
 949                                 action)->weight);
 950     ((surf_action_network_CM02_t) action)->suspended = 0;
 951     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 952       heap_remove((surf_action_network_CM02_t) action);
 953   }
 954 }
 955
 956 static int net_action_is_suspended(surf_action_t action)
 957 {
 958   return ((surf_action_network_CM02_t) action)->suspended;
 959 }
 960
 961 void net_action_set_max_duration(surf_action_t action, double duration)
 962 {
 963   action->max_duration = duration;
 964   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 965     heap_remove((surf_action_network_CM02_t) action);
 966 }
 967
 968 #ifdef HAVE_TRACING
 969 static void net_action_set_category(surf_action_t action,
 970                                     const char *category)
 971 {
 972   action->category = xbt_strdup(category);
 973 }
 974 #endif
 975
 976 static void net_finalize(void)
 977 {
 978   surf_model_exit(surf_network_model);
 979   surf_network_model = NULL;
 980
 981   lmm_system_free(network_maxmin_system);
 982   network_maxmin_system = NULL;
 983
 984   if (network_update_mechanism == UM_LAZY) {
 985     xbt_heap_free(net_action_heap);
 986     xbt_swag_free(net_modified_set);
 987   }
 988
 989   if (smpi_bw_factor)
 990     xbt_dynar_free(&smpi_bw_factor);
 991   if (smpi_lat_factor)
 992     xbt_dynar_free(&smpi_lat_factor);
 993 }
 994
 995 static void smpi_gap_append(double size, const link_CM02_t link,
 996                             surf_action_network_CM02_t action)
 997 {
 998   const char *src = link->lmm_resource.generic_resource.name;
 999   xbt_fifo_t fifo;
1000   surf_action_network_CM02_t last_action;
1001   double bw;
1002
1003   if (sg_sender_gap > 0.0) {
1004     if (!gap_lookup) {
1005       gap_lookup = xbt_dict_new();
1006     }
1007     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1008     action->sender.gap = 0.0;
1009     if (fifo && xbt_fifo_size(fifo) > 0) {
1010       /* Compute gap from last send */
1011       last_action =
1012           (surf_action_network_CM02_t)
1013           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1014       bw = net_get_link_bandwidth(link);
1015       action->sender.gap =
1016           last_action->sender.gap + max(sg_sender_gap,
1017                                         last_action->sender.size / bw);
1018       action->latency += action->sender.gap;
1019     }
1020     /* Append action as last send */
1021     action->sender.link_name = link->lmm_resource.generic_resource.name;
1022     fifo =
1023         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1024                                           action->sender.link_name);
1025     if (!fifo) {
1026       fifo = xbt_fifo_new();
1027       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1028     }
1029     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1030     action->sender.size = size;
1031   }
1032 }
1033
1034 static void smpi_gap_remove(surf_action_network_CM02_t action)
1035 {
1036   xbt_fifo_t fifo;
1037   size_t size;
1038
1039   if (sg_sender_gap > 0.0 && action->sender.link_name
1040       && action->sender.fifo_item) {
1041     fifo =
1042         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1043                                           action->sender.link_name);
1044     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1045     size = xbt_fifo_size(fifo);
1046     if (size == 0) {
1047       xbt_fifo_free(fifo);
1048       xbt_dict_remove(gap_lookup, action->sender.link_name);
1049       size = xbt_dict_length(gap_lookup);
1050       if (size == 0) {
1051         xbt_dict_free(&gap_lookup);
1052       }
1053     }
1054   }
1055 }
1056
1057 static void surf_network_model_init_internal(void)
1058 {
1059   s_surf_action_network_CM02_t comm;
1060   surf_network_model = surf_model_init();
1061
1062   surf_network_model->name = "network";
1063   surf_network_model->action_unref = net_action_unref;
1064   surf_network_model->action_cancel = net_action_cancel;
1065   surf_network_model->action_recycle = net_action_recycle;
1066   surf_network_model->get_remains = net_action_get_remains;
1067 #ifdef HAVE_LATENCY_BOUND_TRACKING
1068   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1069 #endif
1070 #ifdef HAVE_TRACING
1071   surf_network_model->set_category = net_action_set_category;
1072 #endif
1073
1074   surf_network_model->model_private->resource_used = net_resource_used;
1075   if (network_update_mechanism == UM_LAZY) {
1076     surf_network_model->model_private->share_resources =
1077         net_share_resources_lazy;
1078     surf_network_model->model_private->update_actions_state =
1079         net_update_actions_state_lazy;
1080   } else if (network_update_mechanism == UM_FULL) {
1081     surf_network_model->model_private->share_resources =
1082         net_share_resources_full;
1083     surf_network_model->model_private->update_actions_state =
1084         net_update_actions_state_full;
1085   }
1086
1087   surf_network_model->model_private->update_resource_state =
1088       net_update_resource_state;
1089   surf_network_model->model_private->finalize = net_finalize;
1090
1091   surf_network_model->suspend = net_action_suspend;
1092   surf_network_model->resume = net_action_resume;
1093   surf_network_model->is_suspended = net_action_is_suspended;
1094   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1095
1096   surf_network_model->extension.network.communicate = net_communicate;
1097   surf_network_model->extension.network.get_route = net_get_route;
1098   surf_network_model->extension.network.get_link_bandwidth =
1099       net_get_link_bandwidth;
1100   surf_network_model->extension.network.get_link_latency =
1101       net_get_link_latency;
1102   surf_network_model->extension.network.link_shared = net_link_shared;
1103   surf_network_model->extension.network.add_traces = net_add_traces;
1104   surf_network_model->extension.network.create_resource =
1105       net_create_resource;
1106
1107   if (!network_maxmin_system)
1108     network_maxmin_system = lmm_system_new(net_selective_update);
1109
1110   routing_model_create(sizeof(link_CM02_t),
1111                        net_create_resource("__loopback__",
1112                                            498000000, NULL, 0.000015, NULL,
1113                                            SURF_RESOURCE_ON, NULL,
1114                                            SURF_LINK_FATPIPE, NULL));
1115
1116   if (network_update_mechanism == UM_LAZY) {
1117     net_action_heap = xbt_heap_new(8, NULL);
1118     xbt_heap_set_update_callback(net_action_heap,
1119                                  net_action_update_index_heap);
1120     net_modified_set =
1121         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1122     network_maxmin_system->keep_track = net_modified_set;
1123   }
1124 }
1125
1126 static void set_update_mechanism(void)
1127 {
1128 #ifdef HAVE_TRACING
1129   TRACE_set_network_update_mechanism();
1130 #endif
1131
1132   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1133   int select =
1134       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1135
1136   if (!strcmp(optim, "Full")) {
1137     network_update_mechanism = UM_FULL;
1138     net_selective_update = select;
1139   } else if (!strcmp(optim, "Lazy")) {
1140     network_update_mechanism = UM_LAZY;
1141     net_selective_update = 1;
1142     xbt_assert((select == 1)
1143                ||
1144                (xbt_cfg_is_default_value
1145                 (_surf_cfg_set, "network/maxmin_selective_update")),
1146                "Disabling selective update while using the lazy update mechanism is dumb!");
1147   } else {
1148     xbt_die("Unsupported optimization (%s) for this model", optim);
1149   }
1150 }
1151
1152 /************************************************************************/
1153 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1154 /************************************************************************/
1155 /* @Inproceedings{smpi_ipdps, */
1156 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1157 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1158 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1159 /*  address={Anchorage (Alaska) USA}, */
1160 /*  month=may, */
1161 /*  year={2011} */
1162 /*  } */
1163 void surf_network_model_init_SMPI(void)
1164 {
1165
1166   if (surf_network_model)
1167     return;
1168   set_update_mechanism();
1169
1170   surf_network_model_init_internal();
1171   latency_factor_callback = &smpi_latency_factor;
1172   bandwidth_factor_callback = &smpi_bandwidth_factor;
1173   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1174   gap_append = &smpi_gap_append;
1175   gap_remove = &smpi_gap_remove;
1176   net_define_callbacks();
1177   xbt_dynar_push(model_list, &surf_network_model);
1178   network_solve = lmm_solve;
1179
1180   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1181   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1182 }
1183
1184 /************************************************************************/
1185 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1186 /************************************************************************/
1187 /* @techreport{VELHO:2011:HAL-00646896:1, */
1188 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1189 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1190 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1191 /*      type = {Rapport de recherche}, */
1192 /*      institution = {INRIA}, */
1193 /*      number = {RR-7821}, */
1194 /*      year = {2011}, */
1195 /*      month = Nov, */
1196 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1197 /*  } */
1198 void surf_network_model_init_LegrandVelho(void)
1199 {
1200   if (surf_network_model)
1201     return;
1202
1203   set_update_mechanism();
1204
1205   surf_network_model_init_internal();
1206   net_define_callbacks();
1207   xbt_dynar_push(model_list, &surf_network_model);
1208   network_solve = lmm_solve;
1209
1210   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1211                             13.01);
1212   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1213                             0.97);
1214   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1215 }
1216
1217 /***************************************************************************/
1218 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1219 /***************************************************************************/
1220 /* @TechReport{      rr-lip2002-40, */
1221 /*   author        = {Henri Casanova and Loris Marchal}, */
1222 /*   institution   = {LIP}, */
1223 /*   title         = {A Network Model for Simulation of Grid Application}, */
1224 /*   number        = {2002-40}, */
1225 /*   month         = {oct}, */
1226 /*   year          = {2002} */
1227 /* } */
1228 void surf_network_model_init_CM02(void)
1229 {
1230
1231   if (surf_network_model)
1232     return;
1233
1234   set_update_mechanism();
1235   surf_network_model_init_internal();
1236   net_define_callbacks();
1237   xbt_dynar_push(model_list, &surf_network_model);
1238   network_solve = lmm_solve;
1239
1240   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1241   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1242                             1.0);
1243   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1244 }
1245
1246 /***************************************************************************/
1247 /* The models from Steven H. Low                                           */
1248 /***************************************************************************/
1249 /* @article{Low03,                                                         */
1250 /*   author={Steven H. Low},                                               */
1251 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1252 /*   year={2003},                                                          */
1253 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1254 /*    volume={11}, number={4},                                             */
1255 /*  }                                                                      */
1256 void surf_network_model_init_Reno(void)
1257 {
1258   if (surf_network_model)
1259     return;
1260
1261   set_update_mechanism();
1262   surf_network_model_init_internal();
1263   net_define_callbacks();
1264
1265   xbt_dynar_push(model_list, &surf_network_model);
1266   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1267                                     func_reno_fpi);
1268   network_solve = lagrange_solve;
1269
1270   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1271   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1272                             0.92);
1273   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1274 }
1275
1276
1277 void surf_network_model_init_Reno2(void)
1278 {
1279   if (surf_network_model)
1280     return;
1281
1282   set_update_mechanism();
1283   surf_network_model_init_internal();
1284   net_define_callbacks();
1285
1286   xbt_dynar_push(model_list, &surf_network_model);
1287   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1288                                     func_reno2_fpi);
1289   network_solve = lagrange_solve;
1290
1291   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1292   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1293                             0.92);
1294   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1295                             8775);
1296 }
1297
1298 void surf_network_model_init_Vegas(void)
1299 {
1300   if (surf_network_model)
1301     return;
1302
1303   set_update_mechanism();
1304   surf_network_model_init_internal();
1305   net_define_callbacks();
1306
1307   xbt_dynar_push(model_list, &surf_network_model);
1308   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1309                                     func_vegas_fpi);
1310   network_solve = lagrange_solve;
1311
1312   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1313   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1314                             0.92);
1315   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1316 }