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 void (*network_solve) (lmm_system_t) = NULL;
  37
  38 xbt_dynar_t smpi_bw_factor = NULL;
  39 xbt_dynar_t smpi_lat_factor = NULL;
  40
  41 typedef struct s_smpi_factor *smpi_factor_t;
  42 typedef struct s_smpi_factor {
  43   long factor;
  44   double value;
  45 } s_smpi_factor_t;
  46
  47
  48 double sg_sender_gap = 0.0;
  49 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  50 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  51 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  52
  53 double sg_tcp_gamma = 0.0;
  54 int sg_network_crosstraffic = 0;
  55
  56 xbt_dict_t gap_lookup = NULL;
  57
  58 static int net_action_is_suspended(surf_action_t action);
  59 static void net_update_action_remaining_lazy(surf_action_network_CM02_t action, double now);
  60
  61 /******************************************************************************/
  62 /*                           Factors callbacks                                */
  63 /******************************************************************************/
  64 static double constant_latency_factor(double size)
  65 {
  66   return sg_latency_factor;
  67 }
  68
  69 static double constant_bandwidth_factor(double size)
  70 {
  71   return sg_bandwidth_factor;
  72 }
  73
  74 static double constant_bandwidth_constraint(double rate, double bound,
  75                                             double size)
  76 {
  77   return rate;
  78 }
  79
  80 /**********************/
  81 /*   SMPI callbacks   */
  82 /**********************/
  83 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
  84 {
  85   char *value = NULL;
  86   unsigned int iter = 0;
  87   s_smpi_factor_t fact;
  88   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
  89
  90   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
  91   radical_elements = xbt_str_split(smpi_coef_string, ";");
  92   xbt_dynar_foreach(radical_elements, iter, value) {
  93
  94     radical_elements2 = xbt_str_split(value, ":");
  95     if (xbt_dynar_length(radical_elements2) != 2)
  96       xbt_die("Malformed radical for smpi factor!");
  97     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
  98     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
  99     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 100     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 101     xbt_dynar_free(&radical_elements2);
 102   }
 103   xbt_dynar_free(&radical_elements);
 104   return smpi_factor;
 105 }
 106
 107 static double smpi_bandwidth_factor(double size)
 108 {
 109   if (!smpi_bw_factor)
 110     smpi_bw_factor =
 111         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 112
 113   unsigned int iter = 0;
 114   s_smpi_factor_t fact;
 115   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 116     if (size >= fact.factor) {
 117       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 118       return fact.value;
 119     }
 120   }
 121
 122   return 1.0;
 123 }
 124
 125 static double smpi_latency_factor(double size)
 126 {
 127   if (!smpi_lat_factor)
 128     smpi_lat_factor =
 129         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 130
 131   unsigned int iter = 0;
 132   s_smpi_factor_t fact;
 133   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 134     if (size >= fact.factor) {
 135       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 136       return fact.value;
 137     }
 138   }
 139
 140   return 1.0;
 141 }
 142
 143 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 144
 145 static double smpi_bandwidth_constraint(double rate, double bound,
 146                                         double size)
 147 {
 148   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 149 }
 150
 151 static double (*latency_factor_callback) (double) =
 152     &constant_latency_factor;
 153 static double (*bandwidth_factor_callback) (double) =
 154     &constant_bandwidth_factor;
 155 static double (*bandwidth_constraint_callback) (double, double, double) =
 156     &constant_bandwidth_constraint;
 157
 158 static void (*gap_append) (double, const link_CM02_t,
 159                            surf_action_network_CM02_t) = NULL;
 160 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 161
 162 static void *net_create_resource(const char *name,
 163                                  double bw_initial,
 164                                  tmgr_trace_t bw_trace,
 165                                  double lat_initial,
 166                                  tmgr_trace_t lat_trace,
 167                                  e_surf_resource_state_t
 168                                  state_initial,
 169                                  tmgr_trace_t state_trace,
 170                                  e_surf_link_sharing_policy_t
 171                                  policy, xbt_dict_t properties)
 172 {
 173   link_CM02_t nw_link = (link_CM02_t)
 174       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 175                             surf_network_model, name, properties,
 176                             surf_network_model->model_private->maxmin_system,
 177                             sg_bandwidth_factor * bw_initial,
 178                             history,
 179                             state_initial, state_trace,
 180                             bw_initial, bw_trace);
 181
 182   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 183              "Link '%s' declared several times in the platform file.",
 184              name);
 185
 186   nw_link->lat_current = lat_initial;
 187   if (lat_trace)
 188     nw_link->lat_event =
 189         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 190
 191   if (policy == SURF_LINK_FATPIPE)
 192     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 193
 194   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 195   XBT_DEBUG("Create link '%s'",name);
 196
 197   return nw_link;
 198 }
 199
 200 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 201 {
 202   if (link->policy == SURF_LINK_FULLDUPLEX) {
 203     char *link_id;
 204     link_id = bprintf("%s_UP", link->id);
 205     net_create_resource(link_id,
 206                         link->bandwidth,
 207                         link->bandwidth_trace,
 208                         link->latency,
 209                         link->latency_trace,
 210                         link->state,
 211                         link->state_trace, link->policy, link->properties);
 212     xbt_free(link_id);
 213     link_id = bprintf("%s_DOWN", link->id);
 214     net_create_resource(link_id,
 215                         link->bandwidth,
 216                         link->bandwidth_trace,
 217                         link->latency,
 218                         link->latency_trace,
 219                         link->state,
 220                         link->state_trace, link->policy, link->properties);
 221     xbt_free(link_id);
 222   } else {
 223     net_create_resource(link->id,
 224                         link->bandwidth,
 225                         link->bandwidth_trace,
 226                         link->latency,
 227                         link->latency_trace,
 228                         link->state,
 229                         link->state_trace, link->policy, link->properties);
 230   }
 231 }
 232
 233 static void net_add_traces(void)
 234 {
 235   xbt_dict_cursor_t cursor = NULL;
 236   char *trace_name, *elm;
 237
 238   static int called = 0;
 239   if (called)
 240     return;
 241   called = 1;
 242
 243   /* connect all traces relative to network */
 244   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 245     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 246     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 247
 248     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 249                trace_name, elm);
 250     xbt_assert(trace,
 251                "Cannot connect trace %s to link %s: trace undefined",
 252                trace_name, elm);
 253
 254     link->lmm_resource.state_event =
 255         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 256   }
 257
 258   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 259     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 260     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 261
 262     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 263                trace_name, elm);
 264     xbt_assert(trace,
 265                "Cannot connect trace %s to link %s: trace undefined",
 266                trace_name, elm);
 267
 268     link->lmm_resource.power.event =
 269         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 270   }
 271
 272   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 273     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 274     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 275
 276     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 277                trace_name, elm);
 278     xbt_assert(trace,
 279                "Cannot connect trace %s to link %s: trace undefined",
 280                trace_name, elm);
 281
 282     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 283   }
 284 }
 285
 286 static void net_define_callbacks(void)
 287 {
 288   /* Figuring out the network links */
 289   sg_platf_link_add_cb(net_parse_link_init);
 290   sg_platf_postparse_add_cb(net_add_traces);
 291 }
 292
 293 static int net_resource_used(void *resource_id)
 294 {
 295   return lmm_constraint_used(surf_network_model->model_private->maxmin_system, ((surf_resource_lmm_t)
 296                                                      resource_id)->
 297                              constraint);
 298 }
 299
 300 static int net_action_unref(surf_action_t action)
 301 {
 302   action->refcount--;
 303   if (!action->refcount) {
 304     xbt_swag_remove(action, action->state_set);
 305     if (((surf_action_lmm_t)action)->variable) {
 306       lmm_variable_free(surf_network_model->model_private->maxmin_system,
 307                         ((surf_action_lmm_t) action)->variable);
 308     }
 309     if (surf_network_model->model_private->update_mechanism == UM_LAZY) {  // remove action from the heap
 310       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t) action);
 311       xbt_swag_remove(action, surf_network_model->model_private->modified_set);
 312     }
 313 #ifdef HAVE_TRACING
 314     if (action->category) xbt_free (action->category);
 315 #endif
 316     surf_action_free(&action);
 317     return 1;
 318   }
 319   return 0;
 320 }
 321
 322
 323
 324 static void net_action_cancel(surf_action_t action)
 325 {
 326   XBT_DEBUG("cancel action %p", action);
 327   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 328   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {    // remove action from the heap
 329     xbt_swag_remove(action, surf_network_model->model_private->modified_set);
 330     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t) action);
 331   }
 332 }
 333
 334 void net_action_recycle(surf_action_t action)
 335 {
 336   return;
 337 }
 338
 339 #ifdef HAVE_LATENCY_BOUND_TRACKING
 340 int net_get_link_latency_limited(surf_action_t action)
 341 {
 342   return action->latency_limited;
 343 }
 344 #endif
 345
 346 double net_action_get_remains(surf_action_t action)
 347 {
 348   XBT_IN("(%p)", action);
 349   /* update remains before return it */
 350   if (surf_network_model->model_private->update_mechanism == UM_LAZY)      /* update remains before return it */
 351     net_update_action_remaining_lazy((surf_action_network_CM02_t)action,
 352         surf_get_clock());
 353   XBT_OUT();
 354   return action->remains;
 355 }
 356
 357 static void net_update_action_remaining_lazy(surf_action_network_CM02_t action, double now)
 358 {
 359   double delta = 0.0;
 360
 361   if (GENERIC_LMM_ACTION(action).suspended != 0)
 362     return;
 363
 364   delta = now - GENERIC_LMM_ACTION(action).last_update;
 365
 366   double_update(&(((surf_action_t)action)->remains),
 367       GENERIC_LMM_ACTION(action).last_value * delta);
 368
 369   if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 370     double_update(&(((surf_action_t)action)->max_duration), delta);
 371
 372   if ((((surf_action_t)action)->remains <= 0) &&
 373       (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 374     ((surf_action_t)action)->finish = surf_get_clock();
 375     surf_network_model->action_state_set((surf_action_t) action,
 376         SURF_ACTION_DONE);
 377
 378     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 379   } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 380       && (((surf_action_t)action)->max_duration <= 0))) {
 381     ((surf_action_t)action)->finish = surf_get_clock();
 382     surf_network_model->action_state_set((surf_action_t) action,
 383         SURF_ACTION_DONE);
 384     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 385   }
 386
 387   GENERIC_LMM_ACTION(action).last_update = now;
 388   GENERIC_LMM_ACTION(action).last_value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 389 }
 390
 391 static double net_share_resources_full(double now)
 392 {
 393   s_surf_action_lmm_t s_action;
 394   surf_action_network_CM02_t action = NULL;
 395   xbt_swag_t running_actions =
 396       surf_network_model->states.running_action_set;
 397   double min;
 398
 399   min = generic_maxmin_share_resources(running_actions,
 400                                        xbt_swag_offset(s_action,
 401                                                        variable),
 402                                                        surf_network_model->model_private->maxmin_system,
 403                                        network_solve);
 404
 405 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 406
 407   xbt_swag_foreach(action, running_actions) {
 408 #ifdef HAVE_LATENCY_BOUND_TRACKING
 409     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 410       action->latency_limited = 1;
 411     } else {
 412       action->latency_limited = 0;
 413     }
 414 #endif
 415     if (action->latency > 0) {
 416       min = (min < 0) ? action->latency : min(min, action->latency);
 417     }
 418   }
 419
 420   XBT_DEBUG("Min of share resources %f", min);
 421
 422   return min;
 423 }
 424
 425 static double net_share_resources_lazy(double now)
 426 {
 427   surf_action_network_CM02_t action = NULL;
 428   double min = -1;
 429   double value;
 430
 431   XBT_DEBUG
 432       ("Before share resources, the size of modified actions set is %d",
 433        xbt_swag_size(surf_network_model->model_private->modified_set));
 434
 435   lmm_solve(surf_network_model->model_private->maxmin_system);
 436
 437   XBT_DEBUG
 438       ("After share resources, The size of modified actions set is %d",
 439        xbt_swag_size(surf_network_model->model_private->modified_set));
 440
 441   while((action = xbt_swag_extract(surf_network_model->model_private->modified_set))) {
 442     int max_dur_flag = 0;
 443
 444     if (GENERIC_ACTION(action).state_set !=
 445         surf_network_model->states.running_action_set)
 446       continue;
 447
 448     /* bogus priority, skip it */
 449     if (GENERIC_ACTION(action).priority <= 0)
 450       continue;
 451
 452     net_update_action_remaining_lazy(action,now);
 453
 454     min = -1;
 455     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 456     if (value > 0) {
 457       if (GENERIC_ACTION(action).remains > 0) {
 458         value = GENERIC_ACTION(action).remains / value;
 459         min = now + value;
 460       } else {
 461         value = 0.0;
 462         min = now;
 463       }
 464     }
 465
 466     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 467         && (min == -1
 468             || GENERIC_ACTION(action).start +
 469             GENERIC_ACTION(action).max_duration < min)) {
 470       min = GENERIC_ACTION(action).start +
 471           GENERIC_ACTION(action).max_duration;
 472       max_dur_flag = 1;
 473     }
 474
 475     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 476               GENERIC_ACTION(action).start, now + value,
 477               GENERIC_ACTION(action).max_duration);
 478
 479     if (min != -1) {
 480       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 481       surf_action_lmm_heap_insert(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 482       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 483                 now);
 484     } else DIE_IMPOSSIBLE;
 485   }
 486
 487   //hereafter must have already the min value for this resource model
 488   if (xbt_heap_size(surf_network_model->model_private->action_heap) > 0)
 489     min = xbt_heap_maxkey(surf_network_model->model_private->action_heap) - now;
 490   else
 491     min = -1;
 492
 493   XBT_DEBUG("The minimum with the HEAP %lf", min);
 494
 495   return min;
 496 }
 497
 498 static void net_update_actions_state_full(double now, double delta)
 499 {
 500   double deltap = 0.0;
 501   surf_action_network_CM02_t action = NULL;
 502   surf_action_network_CM02_t next_action = NULL;
 503   xbt_swag_t running_actions =
 504       surf_network_model->states.running_action_set;
 505   /*
 506      xbt_swag_t failed_actions =
 507      surf_network_model->states.failed_action_set;
 508    */
 509
 510   xbt_swag_foreach_safe(action, next_action, running_actions) {
 511     deltap = delta;
 512     if (action->latency > 0) {
 513       if (action->latency > deltap) {
 514         double_update(&(action->latency), deltap);
 515         deltap = 0.0;
 516       } else {
 517         double_update(&(deltap), action->latency);
 518         action->latency = 0.0;
 519       }
 520       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 521         lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 522                                    action->weight);
 523     }
 524 #ifdef HAVE_TRACING
 525     if (TRACE_is_enabled()) {
 526       int n = lmm_get_number_of_cnst_from_var(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable);
 527       unsigned int i;
 528       for (i = 0; i < n; i++){
 529         lmm_constraint_t constraint = lmm_get_cnst_from_var(surf_network_model->model_private->maxmin_system,
 530                                                             GENERIC_LMM_ACTION(action).variable,
 531                                                             i);
 532         link_CM02_t link = lmm_constraint_id(constraint);
 533         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 534                                         ((surf_action_t)action)->category,
 535                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 536                                         lmm_get_cnst_weight_from_var(surf_network_model->model_private->maxmin_system,
 537                                             GENERIC_LMM_ACTION(action).variable,
 538                                             i)),
 539                                         now - delta,
 540                                         delta);
 541       }
 542     }
 543 #endif
 544     if (!lmm_get_number_of_cnst_from_var
 545         (surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 546       /* There is actually no link used, hence an infinite bandwidth.
 547        * This happens often when using models like vivaldi.
 548        * In such case, just make sure that the action completes immediately.
 549        */
 550       double_update(&(GENERIC_ACTION(action).remains),
 551                     GENERIC_ACTION(action).remains);
 552     }
 553     double_update(&(GENERIC_ACTION(action).remains),
 554                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 555     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 556       double_update(&(((surf_action_t)action)->max_duration), delta);
 557
 558     if ((GENERIC_ACTION(action).remains <= 0) &&
 559         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 560       ((surf_action_t)action)->finish = surf_get_clock();
 561       surf_network_model->action_state_set((surf_action_t) action,
 562                                            SURF_ACTION_DONE);
 563
 564       if (gap_remove)
 565         gap_remove(action);
 566     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 567                && (((surf_action_t)action)->max_duration <= 0)) {
 568       ((surf_action_t)action)->finish = surf_get_clock();
 569       surf_network_model->action_state_set((surf_action_t) action,
 570                                            SURF_ACTION_DONE);
 571       if (gap_remove)
 572         gap_remove(action);
 573     }
 574   }
 575
 576   return;
 577 }
 578
 579 static void net_update_actions_state_lazy(double now, double delta)
 580 {
 581   surf_action_network_CM02_t action = NULL;
 582
 583   while ((xbt_heap_size(surf_network_model->model_private->action_heap) > 0)
 584          && (double_equals(xbt_heap_maxkey(surf_network_model->model_private->action_heap), now))) {
 585     action = xbt_heap_pop(surf_network_model->model_private->action_heap);
 586     XBT_DEBUG("Action %p: finish", action);
 587     GENERIC_ACTION(action).finish = surf_get_clock();
 588 #ifdef HAVE_TRACING
 589     if (TRACE_is_enabled()) {
 590       int n = lmm_get_number_of_cnst_from_var(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable);
 591       unsigned int i;
 592       for (i = 0; i < n; i++){
 593         lmm_constraint_t constraint = lmm_get_cnst_from_var(surf_network_model->model_private->maxmin_system,
 594                                                             GENERIC_LMM_ACTION(action).variable,
 595                                                             i);
 596         link_CM02_t link = lmm_constraint_id(constraint);
 597         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 598                                         ((surf_action_t)action)->category,
 599                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 600                                             lmm_get_cnst_weight_from_var(surf_network_model->model_private->maxmin_system,
 601                                                 GENERIC_LMM_ACTION(action).variable,
 602                                                 i)),
 603                                         GENERIC_LMM_ACTION(action).last_update,
 604                                         now - GENERIC_LMM_ACTION(action).last_update);
 605       }
 606     }
 607 #endif
 608
 609     // if I am wearing a latency hat
 610     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 611       lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 612                                  action->weight);
 613       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 614       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 615
 616       // if I am wearing a max_duration or normal hat
 617     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 618         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 619       // no need to communicate anymore
 620       // assume that flows that reached max_duration have remaining of 0
 621       GENERIC_ACTION(action).remains = 0;
 622       ((surf_action_t)action)->finish = surf_get_clock();
 623       surf_network_model->action_state_set((surf_action_t) action,
 624                                            SURF_ACTION_DONE);
 625       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 626     }
 627   }
 628   return;
 629 }
 630
 631 static void net_update_resource_state(void *id,
 632                                       tmgr_trace_event_t event_type,
 633                                       double value, double date)
 634 {
 635   link_CM02_t nw_link = id;
 636   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 637   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 638   /*     value, event_type); */
 639
 640   if (event_type == nw_link->lmm_resource.power.event) {
 641     double delta =
 642         sg_weight_S_parameter / value - sg_weight_S_parameter /
 643         (nw_link->lmm_resource.power.peak *
 644          nw_link->lmm_resource.power.scale);
 645     lmm_variable_t var = NULL;
 646     lmm_element_t elem = NULL;
 647     surf_action_network_CM02_t action = NULL;
 648
 649     nw_link->lmm_resource.power.peak = value;
 650     lmm_update_constraint_bound(surf_network_model->model_private->maxmin_system,
 651                                 nw_link->lmm_resource.constraint,
 652                                 sg_bandwidth_factor *
 653                                 (nw_link->lmm_resource.power.peak *
 654                                  nw_link->lmm_resource.power.scale));
 655 #ifdef HAVE_TRACING
 656     TRACE_surf_link_set_bandwidth(date,
 657                                   (char
 658                                    *) (((nw_link->lmm_resource).
 659                                         generic_resource).name),
 660                                   sg_bandwidth_factor *
 661                                   (nw_link->lmm_resource.power.peak *
 662                                    nw_link->lmm_resource.power.scale));
 663 #endif
 664     if (sg_weight_S_parameter > 0) {
 665       while ((var = lmm_get_var_from_cnst
 666               (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 667                &elem))) {
 668         action = lmm_variable_id(var);
 669         action->weight += delta;
 670         if (!(GENERIC_LMM_ACTION(action).suspended))
 671           lmm_update_variable_weight(surf_network_model->model_private->maxmin_system,
 672                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 673       }
 674     }
 675     if (tmgr_trace_event_free(event_type))
 676       nw_link->lmm_resource.power.event = NULL;
 677   } else if (event_type == nw_link->lat_event) {
 678     double delta = value - nw_link->lat_current;
 679     lmm_variable_t var = NULL;
 680     lmm_element_t elem = NULL;
 681     surf_action_network_CM02_t action = NULL;
 682
 683     nw_link->lat_current = value;
 684     while ((var = lmm_get_var_from_cnst
 685             (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 686              &elem))) {
 687       action = lmm_variable_id(var);
 688       action->lat_current += delta;
 689       action->weight += delta;
 690       if (action->rate < 0)
 691         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 692                                   sg_tcp_gamma / (2.0 *
 693                                                   action->lat_current));
 694       else {
 695         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 696                                   min(action->rate,
 697                                       sg_tcp_gamma / (2.0 *
 698                                                       action->
 699                                                       lat_current)));
 700
 701         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 702           XBT_INFO("Flow is limited BYBANDWIDTH");
 703         } else {
 704           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 705                    action->lat_current);
 706         }
 707       }
 708       if (!(GENERIC_LMM_ACTION(action).suspended))
 709         lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 710                                    action->weight);
 711
 712     }
 713     if (tmgr_trace_event_free(event_type))
 714       nw_link->lat_event = NULL;
 715   } else if (event_type == nw_link->lmm_resource.state_event) {
 716     if (value > 0)
 717       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 718     else {
 719       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 720       lmm_variable_t var = NULL;
 721       lmm_element_t elem = NULL;
 722
 723       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 724       while ((var = lmm_get_var_from_cnst
 725               (surf_network_model->model_private->maxmin_system, cnst, &elem))) {
 726         surf_action_t action = lmm_variable_id(var);
 727
 728         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 729             surf_action_state_get(action) == SURF_ACTION_READY) {
 730           action->finish = date;
 731           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 732         }
 733       }
 734     }
 735     if (tmgr_trace_event_free(event_type))
 736       nw_link->lmm_resource.state_event = NULL;
 737   } else {
 738     XBT_CRITICAL("Unknown event ! \n");
 739     xbt_abort();
 740   }
 741
 742   XBT_DEBUG
 743       ("There were a resource state event, need to update actions related to the constraint (%p)",
 744        nw_link->lmm_resource.constraint);
 745   return;
 746 }
 747
 748
 749 static surf_action_t net_communicate(sg_routing_edge_t src,
 750                                      sg_routing_edge_t dst,
 751                                      double size, double rate)
 752 {
 753   unsigned int i;
 754   link_CM02_t link;
 755   int failed = 0;
 756   surf_action_network_CM02_t action = NULL;
 757   double bandwidth_bound;
 758   double latency = 0.0;
 759   xbt_dynar_t back_route = NULL;
 760   int constraints_per_variable = 0;
 761
 762   xbt_dynar_t route = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
 763
 764   XBT_IN("(%s,%s,%g,%g)", src->name, dst->name, size, rate);
 765
 766   routing_get_route_and_latency(src, dst, &route, &latency);
 767   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 768              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 769              src->name, dst->name);
 770
 771   xbt_dynar_foreach(route, i, link) {
 772     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 773       failed = 1;
 774       break;
 775     }
 776   }
 777   if (sg_network_crosstraffic == 1) {
 778     routing_get_route_and_latency(dst, src, &back_route, NULL);
 779     xbt_dynar_foreach(back_route, i, link) {
 780       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 781         failed = 1;
 782         break;
 783       }
 784     }
 785   }
 786
 787   action =
 788       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 789                       surf_network_model, failed);
 790 #ifdef HAVE_LATENCY_BOUND_TRACKING
 791   action->latency_limited = 0;
 792 #endif
 793   action->weight = action->latency = latency;
 794
 795   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 796   action->rate = rate;
 797   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 798     GENERIC_LMM_ACTION(action).index_heap = -1;
 799     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 800   }
 801
 802   bandwidth_bound = -1.0;
 803   if (sg_weight_S_parameter > 0) {
 804     xbt_dynar_foreach(route, i, link) {
 805       action->weight +=
 806           sg_weight_S_parameter /
 807           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 808     }
 809   }
 810   xbt_dynar_foreach(route, i, link) {
 811     double bb = bandwidth_factor_callback(size) *
 812         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 813     bandwidth_bound =
 814         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 815   }
 816
 817   action->lat_current = action->latency;
 818   action->latency *= latency_factor_callback(size);
 819   action->rate =
 820       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 821   if (gap_append) {
 822     xbt_assert(!xbt_dynar_is_empty(route),
 823                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 824
 825     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 826     gap_append(size, link, action);
 827     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 828               action, src->name, dst->name, action->sender.gap,
 829               action->latency);
 830   }
 831
 832   constraints_per_variable = xbt_dynar_length(route);
 833   if (back_route != NULL)
 834     constraints_per_variable += xbt_dynar_length(back_route);
 835
 836   if (action->latency > 0) {
 837     GENERIC_LMM_ACTION(action).variable =
 838         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 0.0, -1.0,
 839                          constraints_per_variable);
 840     if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 841       // add to the heap the event when the latency is payed
 842       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 843                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 844       surf_action_lmm_heap_insert(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 845                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 846     }
 847   } else
 848     GENERIC_LMM_ACTION(action).variable =
 849         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 1.0, -1.0,
 850                          constraints_per_variable);
 851
 852   if (action->rate < 0) {
 853     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 854                               (action->lat_current > 0) ?
 855                               sg_tcp_gamma / (2.0 *
 856                                               action->lat_current) : -1.0);
 857   } else {
 858     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 859                               (action->lat_current > 0) ?
 860                               min(action->rate,
 861                                   sg_tcp_gamma / (2.0 *
 862                                                   action->lat_current))
 863                               : action->rate);
 864   }
 865
 866   xbt_dynar_foreach(route, i, link) {
 867     lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 868                GENERIC_LMM_ACTION(action).variable, 1.0);
 869   }
 870
 871   if (sg_network_crosstraffic == 1) {
 872     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 873     xbt_dynar_foreach(back_route, i, link) {
 874       lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 875                  GENERIC_LMM_ACTION(action).variable, .05);
 876     }
 877   }
 878
 879   xbt_dynar_free(&route);
 880   XBT_OUT();
 881
 882   return (surf_action_t) action;
 883 }
 884
 885 static xbt_dynar_t net_get_route(void *src, void *dst)
 886 {
 887   xbt_dynar_t route = NULL;
 888   routing_get_route_and_latency(src, dst, &route, NULL);
 889   return route;
 890 }
 891
 892 static double net_get_link_bandwidth(const void *link)
 893 {
 894   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 895   return lmm->power.peak * lmm->power.scale;
 896 }
 897
 898 static double net_get_link_latency(const void *link)
 899 {
 900   return ((link_CM02_t) link)->lat_current;
 901 }
 902
 903 static int net_link_shared(const void *link)
 904 {
 905   return
 906       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 907 }
 908
 909 static void net_action_suspend(surf_action_t action)
 910 {
 911   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 912   lmm_update_variable_weight(surf_network_model->model_private->maxmin_system,
 913                              ((surf_action_network_CM02_t)
 914                               action)->generic_lmm_action.variable, 0.0);
 915
 916   if (surf_network_model->model_private->update_mechanism == UM_LAZY)      // remove action from the heap
 917     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 918 }
 919
 920 static void net_action_resume(surf_action_t action)
 921 {
 922   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 923     lmm_update_variable_weight(surf_network_model->model_private->maxmin_system,
 924                                ((surf_action_network_CM02_t)
 925                                 action)->generic_lmm_action.variable,
 926                                ((surf_action_network_CM02_t)
 927                                 action)->weight);
 928     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 929     if (surf_network_model->model_private->update_mechanism == UM_LAZY)    // remove action from the heap
 930       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 931   }
 932 }
 933
 934 static int net_action_is_suspended(surf_action_t action)
 935 {
 936   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 937 }
 938
 939 void net_action_set_max_duration(surf_action_t action, double duration)
 940 {
 941   action->max_duration = duration;
 942   if (surf_network_model->model_private->update_mechanism == UM_LAZY)      // remove action from the heap
 943     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 944 }
 945
 946 #ifdef HAVE_TRACING
 947 static void net_action_set_category(surf_action_t action,
 948                                     const char *category)
 949 {
 950   action->category = xbt_strdup(category);
 951 }
 952 #endif
 953
 954 static void net_finalize(void)
 955 {
 956   lmm_system_free(surf_network_model->model_private->maxmin_system);
 957   surf_network_model->model_private->maxmin_system = NULL;
 958
 959   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 960     xbt_heap_free(surf_network_model->model_private->action_heap);
 961     xbt_swag_free(surf_network_model->model_private->modified_set);
 962   }
 963
 964   surf_model_exit(surf_network_model);
 965   surf_network_model = NULL;
 966
 967   if (smpi_bw_factor)
 968     xbt_dynar_free(&smpi_bw_factor);
 969   if (smpi_lat_factor)
 970     xbt_dynar_free(&smpi_lat_factor);
 971 }
 972
 973 static void smpi_gap_append(double size, const link_CM02_t link,
 974                             surf_action_network_CM02_t action)
 975 {
 976   const char *src = link->lmm_resource.generic_resource.name;
 977   xbt_fifo_t fifo;
 978   surf_action_network_CM02_t last_action;
 979   double bw;
 980
 981   if (sg_sender_gap > 0.0) {
 982     if (!gap_lookup) {
 983       gap_lookup = xbt_dict_new();
 984     }
 985     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
 986     action->sender.gap = 0.0;
 987     if (fifo && xbt_fifo_size(fifo) > 0) {
 988       /* Compute gap from last send */
 989       last_action =
 990           (surf_action_network_CM02_t)
 991           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 992       bw = net_get_link_bandwidth(link);
 993       action->sender.gap =
 994           last_action->sender.gap + max(sg_sender_gap,
 995                                         last_action->sender.size / bw);
 996       action->latency += action->sender.gap;
 997     }
 998     /* Append action as last send */
 999     action->sender.link_name = link->lmm_resource.generic_resource.name;
1000     fifo =
1001         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1002                                           action->sender.link_name);
1003     if (!fifo) {
1004       fifo = xbt_fifo_new();
1005       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1006     }
1007     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1008     action->sender.size = size;
1009   }
1010 }
1011
1012 static void smpi_gap_remove(surf_action_network_CM02_t action)
1013 {
1014   xbt_fifo_t fifo;
1015   size_t size;
1016
1017   if (sg_sender_gap > 0.0 && action->sender.link_name
1018       && action->sender.fifo_item) {
1019     fifo =
1020         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1021                                           action->sender.link_name);
1022     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1023     size = xbt_fifo_size(fifo);
1024     if (size == 0) {
1025       xbt_fifo_free(fifo);
1026       xbt_dict_remove(gap_lookup, action->sender.link_name);
1027       size = xbt_dict_length(gap_lookup);
1028       if (size == 0) {
1029         xbt_dict_free(&gap_lookup);
1030       }
1031     }
1032   }
1033 }
1034
1035 static void set_update_mechanism(void)
1036 {
1037   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1038   int select =
1039       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1040
1041   if (!strcmp(optim, "Full")) {
1042     surf_network_model->model_private->update_mechanism = UM_FULL;
1043     surf_network_model->model_private->selective_update = select;
1044   } else if (!strcmp(optim, "Lazy")) {
1045     surf_network_model->model_private->update_mechanism = UM_LAZY;
1046     surf_network_model->model_private->selective_update = 1;
1047     xbt_assert((select == 1)
1048                ||
1049                (xbt_cfg_is_default_value
1050                 (_surf_cfg_set, "network/maxmin_selective_update")),
1051                "Disabling selective update while using the lazy update mechanism is dumb!");
1052   } else {
1053     xbt_die("Unsupported optimization (%s) for this model", optim);
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   set_update_mechanism();
1063
1064   surf_network_model->name = "network";
1065   surf_network_model->action_unref = net_action_unref;
1066   surf_network_model->action_cancel = net_action_cancel;
1067   surf_network_model->action_recycle = net_action_recycle;
1068   surf_network_model->get_remains = net_action_get_remains;
1069 #ifdef HAVE_LATENCY_BOUND_TRACKING
1070   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1071 #endif
1072 #ifdef HAVE_TRACING
1073   surf_network_model->set_category = net_action_set_category;
1074 #endif
1075
1076   surf_network_model->model_private->resource_used = net_resource_used;
1077   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
1078     surf_network_model->model_private->share_resources =
1079         net_share_resources_lazy;
1080     surf_network_model->model_private->update_actions_state =
1081         net_update_actions_state_lazy;
1082   } else if (surf_network_model->model_private->update_mechanism == UM_FULL) {
1083     surf_network_model->model_private->share_resources =
1084         net_share_resources_full;
1085     surf_network_model->model_private->update_actions_state =
1086         net_update_actions_state_full;
1087   }
1088
1089   surf_network_model->model_private->update_resource_state =
1090       net_update_resource_state;
1091   surf_network_model->model_private->finalize = net_finalize;
1092
1093   surf_network_model->suspend = net_action_suspend;
1094   surf_network_model->resume = net_action_resume;
1095   surf_network_model->is_suspended = net_action_is_suspended;
1096   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1097
1098   surf_network_model->extension.network.communicate = net_communicate;
1099   surf_network_model->extension.network.get_route = net_get_route;
1100   surf_network_model->extension.network.get_link_bandwidth =
1101       net_get_link_bandwidth;
1102   surf_network_model->extension.network.get_link_latency =
1103       net_get_link_latency;
1104   surf_network_model->extension.network.link_shared = net_link_shared;
1105   surf_network_model->extension.network.add_traces = net_add_traces;
1106   surf_network_model->extension.network.create_resource =
1107       net_create_resource;
1108
1109   if (!surf_network_model->model_private->maxmin_system)
1110     surf_network_model->model_private->maxmin_system = lmm_system_new(surf_network_model->model_private->selective_update);
1111
1112   routing_model_create(net_create_resource("__loopback__",
1113                                            498000000, NULL, 0.000015, NULL,
1114                                            SURF_RESOURCE_ON, NULL,
1115                                            SURF_LINK_FATPIPE, NULL));
1116
1117   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
1118     surf_network_model->model_private->action_heap = xbt_heap_new(8, NULL);
1119     xbt_heap_set_update_callback(surf_network_model->model_private->action_heap,
1120                                  surf_action_lmm_update_index_heap);
1121     surf_network_model->model_private->modified_set =
1122         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1123     surf_network_model->model_private->maxmin_system->keep_track = surf_network_model->model_private->modified_set;
1124   }
1125 }
1126
1127 /************************************************************************/
1128 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1129 /************************************************************************/
1130 /* @Inproceedings{smpi_ipdps, */
1131 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1132 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1133 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1134 /*  address={Anchorage (Alaska) USA}, */
1135 /*  month=may, */
1136 /*  year={2011} */
1137 /*  } */
1138 void surf_network_model_init_SMPI(void)
1139 {
1140
1141   if (surf_network_model)
1142     return;
1143
1144   surf_network_model_init_internal();
1145   latency_factor_callback = &smpi_latency_factor;
1146   bandwidth_factor_callback = &smpi_bandwidth_factor;
1147   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1148   gap_append = &smpi_gap_append;
1149   gap_remove = &smpi_gap_remove;
1150   net_define_callbacks();
1151   xbt_dynar_push(model_list, &surf_network_model);
1152   network_solve = lmm_solve;
1153
1154   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1155   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1156 }
1157
1158 /************************************************************************/
1159 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1160 /************************************************************************/
1161 /* @techreport{VELHO:2011:HAL-00646896:1, */
1162 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1163 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1164 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1165 /*      type = {Rapport de recherche}, */
1166 /*      institution = {INRIA}, */
1167 /*      number = {RR-7821}, */
1168 /*      year = {2011}, */
1169 /*      month = Nov, */
1170 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1171 /*  } */
1172 void surf_network_model_init_LegrandVelho(void)
1173 {
1174   if (surf_network_model)
1175     return;
1176
1177   surf_network_model_init_internal();
1178   net_define_callbacks();
1179   xbt_dynar_push(model_list, &surf_network_model);
1180   network_solve = lmm_solve;
1181
1182   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1183                             13.01);
1184   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1185                             0.97);
1186   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1187 }
1188
1189 /***************************************************************************/
1190 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1191 /***************************************************************************/
1192 /* @TechReport{      rr-lip2002-40, */
1193 /*   author        = {Henri Casanova and Loris Marchal}, */
1194 /*   institution   = {LIP}, */
1195 /*   title         = {A Network Model for Simulation of Grid Application}, */
1196 /*   number        = {2002-40}, */
1197 /*   month         = {oct}, */
1198 /*   year          = {2002} */
1199 /* } */
1200 void surf_network_model_init_CM02(void)
1201 {
1202
1203   if (surf_network_model)
1204     return;
1205
1206   surf_network_model_init_internal();
1207   net_define_callbacks();
1208   xbt_dynar_push(model_list, &surf_network_model);
1209   network_solve = lmm_solve;
1210
1211   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1212   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1213                             1.0);
1214   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1215 }
1216
1217 /***************************************************************************/
1218 /* The models from Steven H. Low                                           */
1219 /***************************************************************************/
1220 /* @article{Low03,                                                         */
1221 /*   author={Steven H. Low},                                               */
1222 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1223 /*   year={2003},                                                          */
1224 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1225 /*    volume={11}, number={4},                                             */
1226 /*  }                                                                      */
1227 void surf_network_model_init_Reno(void)
1228 {
1229   if (surf_network_model)
1230     return;
1231
1232   surf_network_model_init_internal();
1233   net_define_callbacks();
1234
1235   xbt_dynar_push(model_list, &surf_network_model);
1236   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1237                                     func_reno_fpi);
1238   network_solve = lagrange_solve;
1239
1240   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1241   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1242                             0.92);
1243   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1244 }
1245
1246
1247 void surf_network_model_init_Reno2(void)
1248 {
1249   if (surf_network_model)
1250     return;
1251
1252   surf_network_model_init_internal();
1253   net_define_callbacks();
1254
1255   xbt_dynar_push(model_list, &surf_network_model);
1256   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1257                                     func_reno2_fpi);
1258   network_solve = lagrange_solve;
1259
1260   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1261   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1262                             0.92);
1263   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1264                             8775);
1265 }
1266
1267 void surf_network_model_init_Vegas(void)
1268 {
1269   if (surf_network_model)
1270     return;
1271
1272   surf_network_model_init_internal();
1273   net_define_callbacks();
1274
1275   xbt_dynar_push(model_list, &surf_network_model);
1276   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1277                                     func_vegas_fpi);
1278   network_solve = lagrange_solve;
1279
1280   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1281   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1282                             0.92);
1283   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1284 }