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_LMM_ACTION
  27 #undef GENERIC_ACTION
  28 #define GENERIC_LMM_ACTION(action) (action)->generic_lmm_action
  29 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  30
  31
  32 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  33                                 "Logging specific to the SURF network module");
  34
  35 surf_model_t surf_network_model = NULL;
  36 static lmm_system_t network_maxmin_system = NULL;
  37 static void (*network_solve) (lmm_system_t) = NULL;
  38
  39 xbt_dynar_t smpi_bw_factor = NULL;
  40 xbt_dynar_t smpi_lat_factor = NULL;
  41
  42 typedef struct s_smpi_factor *smpi_factor_t;
  43 typedef struct s_smpi_factor {
  44   long factor;
  45   double value;
  46 } s_smpi_factor_t;
  47
  48 typedef struct s_net_card *net_card_t;
  49 typedef struct s_net_card {
  50   char* name;
  51   void* routing_obj;
  52 } s_net_card_t;
  53
  54 double sg_sender_gap = 0.0;
  55 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  56 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  57 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  58
  59 double sg_tcp_gamma = 0.0;
  60 int sg_network_crosstraffic = 0;
  61
  62 xbt_dict_t gap_lookup = NULL;
  63
  64 e_UM_t network_update_mechanism = UM_UNDEFINED;
  65 static int net_selective_update = 0;
  66
  67 static int net_action_is_suspended(surf_action_t action);
  68 static void update_action_remaining_lazy(double now);
  69
  70 static xbt_swag_t net_modified_set = NULL;
  71 static xbt_heap_t net_action_heap = NULL;
  72
  73 /* added to manage the communication action's heap */
  74 static void net_action_update_index_heap(void *action, int i)
  75 {
  76   surf_action_network_CM02_t a = action;
  77   GENERIC_LMM_ACTION(a).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_t action, double key,
  88                         enum heap_action_type hat)
  89 {
  90   GENERIC_LMM_ACTION(action).hat = hat;
  91   xbt_heap_push(net_action_heap, action, key);
  92 }
  93
  94 static void heap_remove(surf_action_network_CM02_t action)
  95 {
  96   GENERIC_LMM_ACTION(action).hat = NOTSET;
  97   if (GENERIC_LMM_ACTION(action).index_heap >= 0) {
  98     xbt_heap_remove(net_action_heap, GENERIC_LMM_ACTION(action).index_heap);
  99   }
 100 }
 101
 102 /******************************************************************************/
 103 /*                           Factors callbacks                                */
 104 /******************************************************************************/
 105 static double constant_latency_factor(double size)
 106 {
 107   return sg_latency_factor;
 108 }
 109
 110 static double constant_bandwidth_factor(double size)
 111 {
 112   return sg_bandwidth_factor;
 113 }
 114
 115 static double constant_bandwidth_constraint(double rate, double bound,
 116                                             double size)
 117 {
 118   return rate;
 119 }
 120
 121 /**********************/
 122 /*   SMPI callbacks   */
 123 /**********************/
 124 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 125 {
 126   char *value = NULL;
 127   unsigned int iter = 0;
 128   s_smpi_factor_t fact;
 129   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 130
 131   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 132   radical_elements = xbt_str_split(smpi_coef_string, ";");
 133   xbt_dynar_foreach(radical_elements, iter, value) {
 134
 135     radical_elements2 = xbt_str_split(value, ":");
 136     if (xbt_dynar_length(radical_elements2) != 2)
 137       xbt_die("Malformed radical for smpi factor!");
 138     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 139     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 140     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 141     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 142     xbt_dynar_free(&radical_elements2);
 143   }
 144   xbt_dynar_free(&radical_elements);
 145   return smpi_factor;
 146 }
 147
 148 static double smpi_bandwidth_factor(double size)
 149 {
 150   if (!smpi_bw_factor)
 151     smpi_bw_factor =
 152         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 153
 154   unsigned int iter = 0;
 155   s_smpi_factor_t fact;
 156   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 157     if (size >= fact.factor) {
 158       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 159       return fact.value;
 160     }
 161   }
 162
 163   return 1.0;
 164 }
 165
 166 static double smpi_latency_factor(double size)
 167 {
 168   if (!smpi_lat_factor)
 169     smpi_lat_factor =
 170         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 171
 172   unsigned int iter = 0;
 173   s_smpi_factor_t fact;
 174   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 175     if (size >= fact.factor) {
 176       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 177       return fact.value;
 178     }
 179   }
 180
 181   return 1.0;
 182 }
 183
 184 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 185
 186 static double smpi_bandwidth_constraint(double rate, double bound,
 187                                         double size)
 188 {
 189   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 190 }
 191
 192 static double (*latency_factor_callback) (double) =
 193     &constant_latency_factor;
 194 static double (*bandwidth_factor_callback) (double) =
 195     &constant_bandwidth_factor;
 196 static double (*bandwidth_constraint_callback) (double, double, double) =
 197     &constant_bandwidth_constraint;
 198
 199 static void (*gap_append) (double, const link_CM02_t,
 200                            surf_action_network_CM02_t) = NULL;
 201 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 202
 203 static void *net_create_resource(const char *name,
 204                                  double bw_initial,
 205                                  tmgr_trace_t bw_trace,
 206                                  double lat_initial,
 207                                  tmgr_trace_t lat_trace,
 208                                  e_surf_resource_state_t
 209                                  state_initial,
 210                                  tmgr_trace_t state_trace,
 211                                  e_surf_link_sharing_policy_t
 212                                  policy, xbt_dict_t properties)
 213 {
 214   link_CM02_t nw_link = (link_CM02_t)
 215       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 216                             surf_network_model, name, properties,
 217                             network_maxmin_system,
 218                             sg_bandwidth_factor * bw_initial,
 219                             history,
 220                             state_initial, state_trace,
 221                             bw_initial, bw_trace);
 222
 223   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 224              "Link '%s' declared several times in the platform file.",
 225              name);
 226
 227   nw_link->lat_current = lat_initial;
 228   if (lat_trace)
 229     nw_link->lat_event =
 230         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 231
 232   if (policy == SURF_LINK_FATPIPE)
 233     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 234
 235   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 236
 237   return nw_link;
 238 }
 239
 240 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 241 {
 242   if (link->policy == SURF_LINK_FULLDUPLEX) {
 243     char *link_id;
 244     link_id = bprintf("%s_UP", link->id);
 245     net_create_resource(link_id,
 246                         link->bandwidth,
 247                         link->bandwidth_trace,
 248                         link->latency,
 249                         link->latency_trace,
 250                         link->state,
 251                         link->state_trace, link->policy, link->properties);
 252     xbt_free(link_id);
 253     link_id = bprintf("%s_DOWN", link->id);
 254     net_create_resource(link_id,
 255                         link->bandwidth,
 256                         link->bandwidth_trace,
 257                         link->latency,
 258                         link->latency_trace,
 259                         link->state,
 260                         link->state_trace, link->policy, link->properties);
 261     xbt_free(link_id);
 262   } else {
 263     net_create_resource(link->id,
 264                         link->bandwidth,
 265                         link->bandwidth_trace,
 266                         link->latency,
 267                         link->latency_trace,
 268                         link->state,
 269                         link->state_trace, link->policy, link->properties);
 270   }
 271 }
 272
 273 static void net_add_traces(void)
 274 {
 275   xbt_dict_cursor_t cursor = NULL;
 276   char *trace_name, *elm;
 277
 278   static int called = 0;
 279   if (called)
 280     return;
 281   called = 1;
 282
 283   /* connect all traces relative to network */
 284   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 285     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 286     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 287
 288     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 289                trace_name, elm);
 290     xbt_assert(trace,
 291                "Cannot connect trace %s to link %s: trace undefined",
 292                trace_name, elm);
 293
 294     link->lmm_resource.state_event =
 295         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 296   }
 297
 298   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 299     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 300     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 301
 302     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 303                trace_name, elm);
 304     xbt_assert(trace,
 305                "Cannot connect trace %s to link %s: trace undefined",
 306                trace_name, elm);
 307
 308     link->lmm_resource.power.event =
 309         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 310   }
 311
 312   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 313     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 314     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 315
 316     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 317                trace_name, elm);
 318     xbt_assert(trace,
 319                "Cannot connect trace %s to link %s: trace undefined",
 320                trace_name, elm);
 321
 322     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 323   }
 324 }
 325
 326 static void net_define_callbacks(void)
 327 {
 328   /* Figuring out the network links */
 329   sg_platf_link_add_cb(net_parse_link_init);
 330   sg_platf_postparse_add_cb(net_add_traces);
 331 }
 332
 333 static int net_resource_used(void *resource_id)
 334 {
 335   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 336                                                      resource_id)->
 337                              constraint);
 338 }
 339
 340 static int net_action_unref(surf_action_t action)
 341 {
 342   action->refcount--;
 343   if (!action->refcount) {
 344     xbt_swag_remove(action, action->state_set);
 345     if (((surf_action_lmm_t)action)->variable) {
 346       lmm_variable_free(network_maxmin_system,
 347                         ((surf_action_lmm_t) action)->variable);
 348     }
 349     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 350       heap_remove((surf_action_network_CM02_t) action);
 351       xbt_swag_remove(action, net_modified_set);
 352     }
 353     surf_action_free(&action);
 354     return 1;
 355   }
 356   return 0;
 357 }
 358
 359
 360
 361 static void net_action_cancel(surf_action_t action)
 362 {
 363   XBT_DEBUG("cancel action %p", action);
 364   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 365   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 366     xbt_swag_remove(action, net_modified_set);
 367     heap_remove((surf_action_network_CM02_t) action);
 368   }
 369 }
 370
 371 void net_action_recycle(surf_action_t action)
 372 {
 373   return;
 374 }
 375
 376 #ifdef HAVE_LATENCY_BOUND_TRACKING
 377 int net_get_link_latency_limited(surf_action_t action)
 378 {
 379   return action->latency_limited;
 380 }
 381 #endif
 382
 383 double net_action_get_remains(surf_action_t action)
 384 {
 385   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 386     update_action_remaining_lazy(surf_get_clock());
 387   return action->remains;
 388 }
 389
 390 static void update_action_remaining_lazy(double now)
 391 {
 392   surf_action_network_CM02_t action = NULL;
 393   double delta = 0.0;
 394
 395   xbt_swag_foreach(action, net_modified_set) {
 396
 397     if (GENERIC_LMM_ACTION(action).suspended != 0) {
 398       continue;
 399     }
 400
 401     delta = now - GENERIC_LMM_ACTION(action).last_update;
 402
 403     double_update(&(((surf_action_t)action)->remains),
 404                   lmm_variable_getvalue(((surf_action_lmm_t) action)->variable) * delta);
 405
 406     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 407       double_update(&(((surf_action_t)action)->max_duration), delta);
 408
 409     if ((((surf_action_t)action)->remains <= 0) &&
 410         (lmm_get_variable_weight(((surf_action_lmm_t)action)->variable) > 0)) {
 411       ((surf_action_t)action)->finish = surf_get_clock();
 412       surf_network_model->action_state_set((surf_action_t) action,
 413                                            SURF_ACTION_DONE);
 414       heap_remove(action);
 415     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 416                && (((surf_action_t)action)->max_duration <= 0))) {
 417       ((surf_action_t)action)->finish = surf_get_clock();
 418       surf_network_model->action_state_set((surf_action_t) action,
 419                                            SURF_ACTION_DONE);
 420       heap_remove(action);
 421     }
 422
 423     GENERIC_LMM_ACTION(action).last_update = now;
 424   }
 425 }
 426
 427 static double net_share_resources_full(double now)
 428 {
 429   s_surf_action_lmm_t s_action;
 430   surf_action_network_CM02_t action = NULL;
 431   xbt_swag_t running_actions =
 432       surf_network_model->states.running_action_set;
 433   double min;
 434
 435   min = generic_maxmin_share_resources(running_actions,
 436                                        xbt_swag_offset(s_action,
 437                                                        variable),
 438                                        network_maxmin_system,
 439                                        network_solve);
 440
 441 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 442
 443   xbt_swag_foreach(action, running_actions) {
 444 #ifdef HAVE_LATENCY_BOUND_TRACKING
 445     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 446       action->latency_limited = 1;
 447     } else {
 448       action->latency_limited = 0;
 449     }
 450 #endif
 451     if (action->latency > 0) {
 452       min = (min < 0) ? action->latency : min(min, action->latency);
 453     }
 454   }
 455
 456   XBT_DEBUG("Min of share resources %f", min);
 457
 458   return min;
 459 }
 460
 461 static double net_share_resources_lazy(double now)
 462 {
 463   surf_action_network_CM02_t action = NULL;
 464   double min = -1;
 465   double value;
 466
 467   XBT_DEBUG
 468       ("Before share resources, the size of modified actions set is %d",
 469        xbt_swag_size(net_modified_set));
 470   update_action_remaining_lazy(now);
 471
 472   lmm_solve(network_maxmin_system);
 473
 474   XBT_DEBUG
 475       ("After share resources, The size of modified actions set is %d",
 476        xbt_swag_size(net_modified_set));
 477
 478   xbt_swag_foreach(action, net_modified_set) {
 479     int max_dur_flag = 0;
 480
 481     if (GENERIC_ACTION(action).state_set !=
 482         surf_network_model->states.running_action_set)
 483       continue;
 484
 485     /* bogus priority, skip it */
 486     if (GENERIC_ACTION(action).priority <= 0)
 487       continue;
 488
 489     min = -1;
 490     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 491     if (value > 0) {
 492       if (GENERIC_ACTION(action).remains > 0) {
 493         value = GENERIC_ACTION(action).remains / value;
 494         min = now + value;
 495       } else {
 496         value = 0.0;
 497         min = now;
 498       }
 499     }
 500
 501     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 502         && (min == -1
 503             || GENERIC_ACTION(action).start +
 504             GENERIC_ACTION(action).max_duration < min)) {
 505       min = GENERIC_ACTION(action).start +
 506           GENERIC_ACTION(action).max_duration;
 507       max_dur_flag = 1;
 508     }
 509
 510     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 511               GENERIC_ACTION(action).start, now + value,
 512               GENERIC_ACTION(action).max_duration);
 513
 514     if (min != -1) {
 515       heap_remove(action);
 516       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 517       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 518                 now);
 519     } else DIE_IMPOSSIBLE;
 520   }
 521
 522   //hereafter must have already the min value for this resource model
 523   if (xbt_heap_size(net_action_heap) > 0)
 524     min = xbt_heap_maxkey(net_action_heap) - now;
 525   else
 526     min = -1;
 527
 528   XBT_DEBUG("The minimum with the HEAP %lf", min);
 529
 530   return min;
 531 }
 532
 533 static void net_update_actions_state_full(double now, double delta)
 534 {
 535   double deltap = 0.0;
 536   surf_action_network_CM02_t action = NULL;
 537   surf_action_network_CM02_t next_action = NULL;
 538   xbt_swag_t running_actions =
 539       surf_network_model->states.running_action_set;
 540   /*
 541      xbt_swag_t failed_actions =
 542      surf_network_model->states.failed_action_set;
 543    */
 544
 545   xbt_swag_foreach_safe(action, next_action, running_actions) {
 546     deltap = delta;
 547     if (action->latency > 0) {
 548       if (action->latency > deltap) {
 549         double_update(&(action->latency), deltap);
 550         deltap = 0.0;
 551       } else {
 552         double_update(&(deltap), action->latency);
 553         action->latency = 0.0;
 554       }
 555       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 556         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 557                                    action->weight);
 558     }
 559 #ifdef HAVE_TRACING
 560     if (TRACE_is_enabled()) {
 561       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 562       unsigned int i;
 563       for (i = 0; i < n; i++){
 564         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 565                                                             GENERIC_LMM_ACTION(action).variable,
 566                                                             i);
 567         link_CM02_t link = lmm_constraint_id(constraint);
 568         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 569                                         ((surf_action_t)action)->category,
 570                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 571                                         now - delta,
 572                                         delta);
 573       }
 574     }
 575 #endif
 576     if (!lmm_get_number_of_cnst_from_var
 577         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 578       /* There is actually no link used, hence an infinite bandwidth.
 579        * This happens often when using models like vivaldi.
 580        * In such case, just make sure that the action completes immediately.
 581        */
 582       double_update(&(GENERIC_ACTION(action).remains),
 583                     GENERIC_ACTION(action).remains);
 584     }
 585     double_update(&(GENERIC_ACTION(action).remains),
 586                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 587     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 588       double_update(&(((surf_action_t)action)->max_duration), delta);
 589
 590     if ((GENERIC_ACTION(action).remains <= 0) &&
 591         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 592       ((surf_action_t)action)->finish = surf_get_clock();
 593       surf_network_model->action_state_set((surf_action_t) action,
 594                                            SURF_ACTION_DONE);
 595
 596       if (gap_remove)
 597         gap_remove(action);
 598     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 599                && (((surf_action_t)action)->max_duration <= 0)) {
 600       ((surf_action_t)action)->finish = surf_get_clock();
 601       surf_network_model->action_state_set((surf_action_t) action,
 602                                            SURF_ACTION_DONE);
 603       if (gap_remove)
 604         gap_remove(action);
 605     }
 606   }
 607
 608   return;
 609 }
 610
 611 static void net_update_actions_state_lazy(double now, double delta)
 612 {
 613   surf_action_network_CM02_t action = NULL;
 614
 615   while ((xbt_heap_size(net_action_heap) > 0)
 616          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 617     action = xbt_heap_pop(net_action_heap);
 618     XBT_DEBUG("Action %p: finish", action);
 619     GENERIC_ACTION(action).finish = surf_get_clock();
 620 #ifdef HAVE_TRACING
 621     if (TRACE_is_enabled()) {
 622       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 623       unsigned int i;
 624       for (i = 0; i < n; i++){
 625         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 626                                                             GENERIC_LMM_ACTION(action).variable,
 627                                                             i);
 628         link_CM02_t link = lmm_constraint_id(constraint);
 629         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 630                                         ((surf_action_t)action)->category,
 631                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 632                                         GENERIC_LMM_ACTION(action).last_update,
 633                                         now - GENERIC_LMM_ACTION(action).last_update);
 634       }
 635     }
 636 #endif
 637
 638     // if I am wearing a latency hat
 639     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 640       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 641                                  action->weight);
 642       heap_remove(action);
 643       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 644
 645       // if I am wearing a max_duration or normal hat
 646     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 647         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 648       // no need to communicate anymore
 649       // assume that flows that reached max_duration have remaining of 0
 650       GENERIC_ACTION(action).remains = 0;
 651       ((surf_action_t)action)->finish = surf_get_clock();
 652       surf_network_model->action_state_set((surf_action_t) action,
 653                                            SURF_ACTION_DONE);
 654       heap_remove(action);
 655     }
 656   }
 657   return;
 658 }
 659
 660 static void net_update_resource_state(void *id,
 661                                       tmgr_trace_event_t event_type,
 662                                       double value, double date)
 663 {
 664   link_CM02_t nw_link = id;
 665   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 666   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 667   /*     value, event_type); */
 668
 669   if (event_type == nw_link->lmm_resource.power.event) {
 670     double delta =
 671         sg_weight_S_parameter / value - sg_weight_S_parameter /
 672         (nw_link->lmm_resource.power.peak *
 673          nw_link->lmm_resource.power.scale);
 674     lmm_variable_t var = NULL;
 675     lmm_element_t elem = NULL;
 676     surf_action_network_CM02_t action = NULL;
 677
 678     nw_link->lmm_resource.power.peak = value;
 679     lmm_update_constraint_bound(network_maxmin_system,
 680                                 nw_link->lmm_resource.constraint,
 681                                 sg_bandwidth_factor *
 682                                 (nw_link->lmm_resource.power.peak *
 683                                  nw_link->lmm_resource.power.scale));
 684 #ifdef HAVE_TRACING
 685     TRACE_surf_link_set_bandwidth(date,
 686                                   (char
 687                                    *) (((nw_link->lmm_resource).
 688                                         generic_resource).name),
 689                                   sg_bandwidth_factor *
 690                                   (nw_link->lmm_resource.power.peak *
 691                                    nw_link->lmm_resource.power.scale));
 692 #endif
 693     if (sg_weight_S_parameter > 0) {
 694       while ((var = lmm_get_var_from_cnst
 695               (network_maxmin_system, nw_link->lmm_resource.constraint,
 696                &elem))) {
 697         action = lmm_variable_id(var);
 698         action->weight += delta;
 699         if (!(GENERIC_LMM_ACTION(action).suspended))
 700           lmm_update_variable_weight(network_maxmin_system,
 701                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 702       }
 703     }
 704     if (tmgr_trace_event_free(event_type))
 705       nw_link->lmm_resource.power.event = NULL;
 706   } else if (event_type == nw_link->lat_event) {
 707     double delta = value - nw_link->lat_current;
 708     lmm_variable_t var = NULL;
 709     lmm_element_t elem = NULL;
 710     surf_action_network_CM02_t action = NULL;
 711
 712     nw_link->lat_current = value;
 713     while ((var = lmm_get_var_from_cnst
 714             (network_maxmin_system, nw_link->lmm_resource.constraint,
 715              &elem))) {
 716       action = lmm_variable_id(var);
 717       action->lat_current += delta;
 718       action->weight += delta;
 719       if (action->rate < 0)
 720         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 721                                   sg_tcp_gamma / (2.0 *
 722                                                   action->lat_current));
 723       else {
 724         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 725                                   min(action->rate,
 726                                       sg_tcp_gamma / (2.0 *
 727                                                       action->
 728                                                       lat_current)));
 729
 730         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 731           XBT_INFO("Flow is limited BYBANDWIDTH");
 732         } else {
 733           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 734                    action->lat_current);
 735         }
 736       }
 737       if (!(GENERIC_LMM_ACTION(action).suspended))
 738         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 739                                    action->weight);
 740
 741     }
 742     if (tmgr_trace_event_free(event_type))
 743       nw_link->lat_event = NULL;
 744   } else if (event_type == nw_link->lmm_resource.state_event) {
 745     if (value > 0)
 746       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 747     else {
 748       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 749       lmm_variable_t var = NULL;
 750       lmm_element_t elem = NULL;
 751
 752       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 753       while ((var = lmm_get_var_from_cnst
 754               (network_maxmin_system, cnst, &elem))) {
 755         surf_action_t action = lmm_variable_id(var);
 756
 757         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 758             surf_action_state_get(action) == SURF_ACTION_READY) {
 759           action->finish = date;
 760           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 761         }
 762       }
 763     }
 764     if (tmgr_trace_event_free(event_type))
 765       nw_link->lmm_resource.state_event = NULL;
 766   } else {
 767     XBT_CRITICAL("Unknown event ! \n");
 768     xbt_abort();
 769   }
 770
 771   XBT_DEBUG
 772       ("There were a resource state event, need to update actions related to the constraint (%p)",
 773        nw_link->lmm_resource.constraint);
 774   return;
 775 }
 776
 777
 778 static surf_action_t net_communicate(const char *src_name,
 779                                      const char *dst_name, double size,
 780                                      double rate)
 781 {
 782   unsigned int i;
 783   link_CM02_t link;
 784   int failed = 0;
 785   surf_action_network_CM02_t action = NULL;
 786   double bandwidth_bound;
 787   double latency = 0.0;
 788   xbt_dynar_t back_route = NULL;
 789   int constraints_per_variable = 0;
 790
 791   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 792
 793   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 794
 795   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 796   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 797              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 798              src_name, dst_name);
 799
 800   xbt_dynar_foreach(route, i, link) {
 801     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 802       failed = 1;
 803       break;
 804     }
 805   }
 806   if (sg_network_crosstraffic == 1) {
 807     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 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_t), size,
 818                       surf_network_model, failed);
 819 #ifdef HAVE_LATENCY_BOUND_TRACKING
 820   action->latency_limited = 0;
 821 #endif
 822   action->weight = action->latency = latency;
 823
 824   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 825   action->rate = rate;
 826   if (network_update_mechanism == UM_LAZY) {
 827     GENERIC_LMM_ACTION(action).index_heap = -1;
 828     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 829   }
 830
 831   bandwidth_bound = -1.0;
 832   if (sg_weight_S_parameter > 0) {
 833     xbt_dynar_foreach(route, i, link) {
 834       action->weight +=
 835           sg_weight_S_parameter /
 836           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 837     }
 838   }
 839   xbt_dynar_foreach(route, i, link) {
 840     double bb = bandwidth_factor_callback(size) *
 841         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 842     bandwidth_bound =
 843         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 844   }
 845
 846   action->lat_current = action->latency;
 847   action->latency *= latency_factor_callback(size);
 848   action->rate =
 849       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 850   if (gap_append) {
 851     xbt_assert(!xbt_dynar_is_empty(route),
 852                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 853
 854     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 855     gap_append(size, link, action);
 856     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 857               action, src_name, dst_name, action->sender.gap,
 858               action->latency);
 859   }
 860
 861   constraints_per_variable = xbt_dynar_length(route);
 862   if (back_route != NULL)
 863     constraints_per_variable += xbt_dynar_length(back_route);
 864
 865   if (action->latency > 0) {
 866     GENERIC_LMM_ACTION(action).variable =
 867         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 868                          constraints_per_variable);
 869     if (network_update_mechanism == UM_LAZY) {
 870       // add to the heap the event when the latency is payed
 871       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 872                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 873       heap_insert(action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 874                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 875     }
 876   } else
 877     GENERIC_LMM_ACTION(action).variable =
 878         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 879                          constraints_per_variable);
 880
 881   if (action->rate < 0) {
 882     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 883                               (action->lat_current > 0) ?
 884                               sg_tcp_gamma / (2.0 *
 885                                               action->lat_current) : -1.0);
 886   } else {
 887     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 888                               (action->lat_current > 0) ?
 889                               min(action->rate,
 890                                   sg_tcp_gamma / (2.0 *
 891                                                   action->lat_current))
 892                               : action->rate);
 893   }
 894
 895   xbt_dynar_foreach(route, i, link) {
 896     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 897                GENERIC_LMM_ACTION(action).variable, 1.0);
 898   }
 899
 900   if (sg_network_crosstraffic == 1) {
 901     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 902     xbt_dynar_foreach(back_route, i, link) {
 903       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 904                  GENERIC_LMM_ACTION(action).variable, .05);
 905     }
 906   }
 907
 908   xbt_dynar_free(&route);
 909   XBT_OUT();
 910
 911   return (surf_action_t) action;
 912 }
 913
 914 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 915 {
 916   xbt_dynar_t route = NULL;
 917   routing_get_route_and_latency(src, dst, &route, NULL);
 918   return route;
 919 }
 920
 921 static double net_get_link_bandwidth(const void *link)
 922 {
 923   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 924   return lmm->power.peak * lmm->power.scale;
 925 }
 926
 927 static double net_get_link_latency(const void *link)
 928 {
 929   return ((link_CM02_t) link)->lat_current;
 930 }
 931
 932 static int net_link_shared(const void *link)
 933 {
 934   return
 935       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 936 }
 937
 938 static void net_action_suspend(surf_action_t action)
 939 {
 940   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 941   lmm_update_variable_weight(network_maxmin_system,
 942                              ((surf_action_network_CM02_t)
 943                               action)->generic_lmm_action.variable, 0.0);
 944
 945   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 946     heap_remove((surf_action_network_CM02_t) action);
 947 }
 948
 949 static void net_action_resume(surf_action_t action)
 950 {
 951   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 952     lmm_update_variable_weight(network_maxmin_system,
 953                                ((surf_action_network_CM02_t)
 954                                 action)->generic_lmm_action.variable,
 955                                ((surf_action_network_CM02_t)
 956                                 action)->weight);
 957     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 958     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 959       heap_remove((surf_action_network_CM02_t) action);
 960   }
 961 }
 962
 963 static int net_action_is_suspended(surf_action_t action)
 964 {
 965   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 966 }
 967
 968 void net_action_set_max_duration(surf_action_t action, double duration)
 969 {
 970   action->max_duration = duration;
 971   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 972     heap_remove((surf_action_network_CM02_t) action);
 973 }
 974
 975 #ifdef HAVE_TRACING
 976 static void net_action_set_category(surf_action_t action,
 977                                     const char *category)
 978 {
 979   action->category = xbt_strdup(category);
 980 }
 981 #endif
 982
 983 static void net_finalize(void)
 984 {
 985   surf_model_exit(surf_network_model);
 986   surf_network_model = NULL;
 987
 988   lmm_system_free(network_maxmin_system);
 989   network_maxmin_system = NULL;
 990
 991   if (network_update_mechanism == UM_LAZY) {
 992     xbt_heap_free(net_action_heap);
 993     xbt_swag_free(net_modified_set);
 994   }
 995
 996   if (smpi_bw_factor)
 997     xbt_dynar_free(&smpi_bw_factor);
 998   if (smpi_lat_factor)
 999     xbt_dynar_free(&smpi_lat_factor);
1000 }
1001
1002 static void smpi_gap_append(double size, const link_CM02_t link,
1003                             surf_action_network_CM02_t action)
1004 {
1005   const char *src = link->lmm_resource.generic_resource.name;
1006   xbt_fifo_t fifo;
1007   surf_action_network_CM02_t last_action;
1008   double bw;
1009
1010   if (sg_sender_gap > 0.0) {
1011     if (!gap_lookup) {
1012       gap_lookup = xbt_dict_new();
1013     }
1014     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1015     action->sender.gap = 0.0;
1016     if (fifo && xbt_fifo_size(fifo) > 0) {
1017       /* Compute gap from last send */
1018       last_action =
1019           (surf_action_network_CM02_t)
1020           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1021       bw = net_get_link_bandwidth(link);
1022       action->sender.gap =
1023           last_action->sender.gap + max(sg_sender_gap,
1024                                         last_action->sender.size / bw);
1025       action->latency += action->sender.gap;
1026     }
1027     /* Append action as last send */
1028     action->sender.link_name = link->lmm_resource.generic_resource.name;
1029     fifo =
1030         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1031                                           action->sender.link_name);
1032     if (!fifo) {
1033       fifo = xbt_fifo_new();
1034       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1035     }
1036     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1037     action->sender.size = size;
1038   }
1039 }
1040
1041 static void smpi_gap_remove(surf_action_network_CM02_t action)
1042 {
1043   xbt_fifo_t fifo;
1044   size_t size;
1045
1046   if (sg_sender_gap > 0.0 && action->sender.link_name
1047       && action->sender.fifo_item) {
1048     fifo =
1049         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1050                                           action->sender.link_name);
1051     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1052     size = xbt_fifo_size(fifo);
1053     if (size == 0) {
1054       xbt_fifo_free(fifo);
1055       xbt_dict_remove(gap_lookup, action->sender.link_name);
1056       size = xbt_dict_length(gap_lookup);
1057       if (size == 0) {
1058         xbt_dict_free(&gap_lookup);
1059       }
1060     }
1061   }
1062 }
1063
1064 static void surf_network_model_init_internal(void)
1065 {
1066   s_surf_action_network_CM02_t comm;
1067   surf_network_model = surf_model_init();
1068
1069   surf_network_model->name = "network";
1070   surf_network_model->action_unref = net_action_unref;
1071   surf_network_model->action_cancel = net_action_cancel;
1072   surf_network_model->action_recycle = net_action_recycle;
1073   surf_network_model->get_remains = net_action_get_remains;
1074 #ifdef HAVE_LATENCY_BOUND_TRACKING
1075   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1076 #endif
1077 #ifdef HAVE_TRACING
1078   surf_network_model->set_category = net_action_set_category;
1079 #endif
1080
1081   surf_network_model->model_private->resource_used = net_resource_used;
1082   if (network_update_mechanism == UM_LAZY) {
1083     surf_network_model->model_private->share_resources =
1084         net_share_resources_lazy;
1085     surf_network_model->model_private->update_actions_state =
1086         net_update_actions_state_lazy;
1087   } else if (network_update_mechanism == UM_FULL) {
1088     surf_network_model->model_private->share_resources =
1089         net_share_resources_full;
1090     surf_network_model->model_private->update_actions_state =
1091         net_update_actions_state_full;
1092   }
1093
1094   surf_network_model->model_private->update_resource_state =
1095       net_update_resource_state;
1096   surf_network_model->model_private->finalize = net_finalize;
1097
1098   surf_network_model->suspend = net_action_suspend;
1099   surf_network_model->resume = net_action_resume;
1100   surf_network_model->is_suspended = net_action_is_suspended;
1101   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1102
1103   surf_network_model->extension.network.communicate = net_communicate;
1104   surf_network_model->extension.network.get_route = net_get_route;
1105   surf_network_model->extension.network.get_link_bandwidth =
1106       net_get_link_bandwidth;
1107   surf_network_model->extension.network.get_link_latency =
1108       net_get_link_latency;
1109   surf_network_model->extension.network.link_shared = net_link_shared;
1110   surf_network_model->extension.network.add_traces = net_add_traces;
1111   surf_network_model->extension.network.create_resource =
1112       net_create_resource;
1113
1114   if (!network_maxmin_system)
1115     network_maxmin_system = lmm_system_new(net_selective_update);
1116
1117   routing_model_create(sizeof(link_CM02_t),
1118                        net_create_resource("__loopback__",
1119                                            498000000, NULL, 0.000015, NULL,
1120                                            SURF_RESOURCE_ON, NULL,
1121                                            SURF_LINK_FATPIPE, NULL));
1122
1123   if (network_update_mechanism == UM_LAZY) {
1124     net_action_heap = xbt_heap_new(8, NULL);
1125     xbt_heap_set_update_callback(net_action_heap,
1126                                  net_action_update_index_heap);
1127     net_modified_set =
1128         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1129     network_maxmin_system->keep_track = net_modified_set;
1130   }
1131 }
1132
1133 static void set_update_mechanism(void)
1134 {
1135   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1136   int select =
1137       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1138
1139   if (!strcmp(optim, "Full")) {
1140     network_update_mechanism = UM_FULL;
1141     net_selective_update = select;
1142   } else if (!strcmp(optim, "Lazy")) {
1143     network_update_mechanism = UM_LAZY;
1144     net_selective_update = 1;
1145     xbt_assert((select == 1)
1146                ||
1147                (xbt_cfg_is_default_value
1148                 (_surf_cfg_set, "network/maxmin_selective_update")),
1149                "Disabling selective update while using the lazy update mechanism is dumb!");
1150   } else {
1151     xbt_die("Unsupported optimization (%s) for this model", optim);
1152   }
1153 }
1154
1155 /************************************************************************/
1156 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1157 /************************************************************************/
1158 /* @Inproceedings{smpi_ipdps, */
1159 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1160 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1161 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1162 /*  address={Anchorage (Alaska) USA}, */
1163 /*  month=may, */
1164 /*  year={2011} */
1165 /*  } */
1166 void surf_network_model_init_SMPI(void)
1167 {
1168
1169   if (surf_network_model)
1170     return;
1171   set_update_mechanism();
1172
1173   surf_network_model_init_internal();
1174   latency_factor_callback = &smpi_latency_factor;
1175   bandwidth_factor_callback = &smpi_bandwidth_factor;
1176   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1177   gap_append = &smpi_gap_append;
1178   gap_remove = &smpi_gap_remove;
1179   net_define_callbacks();
1180   xbt_dynar_push(model_list, &surf_network_model);
1181   network_solve = lmm_solve;
1182
1183   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1184   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1185 }
1186
1187 /************************************************************************/
1188 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1189 /************************************************************************/
1190 /* @techreport{VELHO:2011:HAL-00646896:1, */
1191 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1192 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1193 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1194 /*      type = {Rapport de recherche}, */
1195 /*      institution = {INRIA}, */
1196 /*      number = {RR-7821}, */
1197 /*      year = {2011}, */
1198 /*      month = Nov, */
1199 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1200 /*  } */
1201 void surf_network_model_init_LegrandVelho(void)
1202 {
1203   if (surf_network_model)
1204     return;
1205
1206   set_update_mechanism();
1207
1208   surf_network_model_init_internal();
1209   net_define_callbacks();
1210   xbt_dynar_push(model_list, &surf_network_model);
1211   network_solve = lmm_solve;
1212
1213   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1214                             13.01);
1215   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1216                             0.97);
1217   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1218 }
1219
1220 /***************************************************************************/
1221 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1222 /***************************************************************************/
1223 /* @TechReport{      rr-lip2002-40, */
1224 /*   author        = {Henri Casanova and Loris Marchal}, */
1225 /*   institution   = {LIP}, */
1226 /*   title         = {A Network Model for Simulation of Grid Application}, */
1227 /*   number        = {2002-40}, */
1228 /*   month         = {oct}, */
1229 /*   year          = {2002} */
1230 /* } */
1231 void surf_network_model_init_CM02(void)
1232 {
1233
1234   if (surf_network_model)
1235     return;
1236
1237   set_update_mechanism();
1238   surf_network_model_init_internal();
1239   net_define_callbacks();
1240   xbt_dynar_push(model_list, &surf_network_model);
1241   network_solve = lmm_solve;
1242
1243   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1244   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1245                             1.0);
1246   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1247 }
1248
1249 /***************************************************************************/
1250 /* The models from Steven H. Low                                           */
1251 /***************************************************************************/
1252 /* @article{Low03,                                                         */
1253 /*   author={Steven H. Low},                                               */
1254 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1255 /*   year={2003},                                                          */
1256 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1257 /*    volume={11}, number={4},                                             */
1258 /*  }                                                                      */
1259 void surf_network_model_init_Reno(void)
1260 {
1261   if (surf_network_model)
1262     return;
1263
1264   set_update_mechanism();
1265   surf_network_model_init_internal();
1266   net_define_callbacks();
1267
1268   xbt_dynar_push(model_list, &surf_network_model);
1269   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1270                                     func_reno_fpi);
1271   network_solve = lagrange_solve;
1272
1273   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1274   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1275                             0.92);
1276   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1277 }
1278
1279
1280 void surf_network_model_init_Reno2(void)
1281 {
1282   if (surf_network_model)
1283     return;
1284
1285   set_update_mechanism();
1286   surf_network_model_init_internal();
1287   net_define_callbacks();
1288
1289   xbt_dynar_push(model_list, &surf_network_model);
1290   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1291                                     func_reno2_fpi);
1292   network_solve = lagrange_solve;
1293
1294   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1295   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1296                             0.92);
1297   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1298                             8775);
1299 }
1300
1301 void surf_network_model_init_Vegas(void)
1302 {
1303   if (surf_network_model)
1304     return;
1305
1306   set_update_mechanism();
1307   surf_network_model_init_internal();
1308   net_define_callbacks();
1309
1310   xbt_dynar_push(model_list, &surf_network_model);
1311   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1312                                     func_vegas_fpi);
1313   network_solve = lagrange_solve;
1314
1315   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1316   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1317                             0.92);
1318   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1319 }