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 void net_update_action_remaining_lazy(surf_action_network_CM02_t action, double now);
  59
  60 /******************************************************************************/
  61 /*                           Factors callbacks                                */
  62 /******************************************************************************/
  63 static double constant_latency_factor(double size)
  64 {
  65   return sg_latency_factor;
  66 }
  67
  68 static double constant_bandwidth_factor(double size)
  69 {
  70   return sg_bandwidth_factor;
  71 }
  72
  73 static double constant_bandwidth_constraint(double rate, double bound,
  74                                             double size)
  75 {
  76   return rate;
  77 }
  78
  79 /**********************/
  80 /*   SMPI callbacks   */
  81 /**********************/
  82 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
  83 {
  84   char *value = NULL;
  85   unsigned int iter = 0;
  86   s_smpi_factor_t fact;
  87   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
  88
  89   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
  90   radical_elements = xbt_str_split(smpi_coef_string, ";");
  91   xbt_dynar_foreach(radical_elements, iter, value) {
  92
  93     radical_elements2 = xbt_str_split(value, ":");
  94     if (xbt_dynar_length(radical_elements2) != 2)
  95       xbt_die("Malformed radical for smpi factor!");
  96     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
  97     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
  98     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
  99     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 100     xbt_dynar_free(&radical_elements2);
 101   }
 102   xbt_dynar_free(&radical_elements);
 103   return smpi_factor;
 104 }
 105
 106 static double smpi_bandwidth_factor(double size)
 107 {
 108   if (!smpi_bw_factor)
 109     smpi_bw_factor =
 110         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 111
 112   unsigned int iter = 0;
 113   s_smpi_factor_t fact;
 114   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 115     if (size >= fact.factor) {
 116       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 117       return fact.value;
 118     }
 119   }
 120
 121   return 1.0;
 122 }
 123
 124 static double smpi_latency_factor(double size)
 125 {
 126   if (!smpi_lat_factor)
 127     smpi_lat_factor =
 128         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 129
 130   unsigned int iter = 0;
 131   s_smpi_factor_t fact;
 132   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 133     if (size >= fact.factor) {
 134       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 135       return fact.value;
 136     }
 137   }
 138
 139   return 1.0;
 140 }
 141
 142 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 143
 144 static double smpi_bandwidth_constraint(double rate, double bound,
 145                                         double size)
 146 {
 147   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 148 }
 149
 150 static double (*latency_factor_callback) (double) =
 151     &constant_latency_factor;
 152 static double (*bandwidth_factor_callback) (double) =
 153     &constant_bandwidth_factor;
 154 static double (*bandwidth_constraint_callback) (double, double, double) =
 155     &constant_bandwidth_constraint;
 156
 157 static void (*gap_append) (double, const link_CM02_t,
 158                            surf_action_network_CM02_t) = NULL;
 159 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 160
 161 static void *net_create_resource(const char *name,
 162                                  double bw_initial,
 163                                  tmgr_trace_t bw_trace,
 164                                  double lat_initial,
 165                                  tmgr_trace_t lat_trace,
 166                                  e_surf_resource_state_t
 167                                  state_initial,
 168                                  tmgr_trace_t state_trace,
 169                                  e_surf_link_sharing_policy_t
 170                                  policy, xbt_dict_t properties)
 171 {
 172   link_CM02_t nw_link = (link_CM02_t)
 173       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 174                             surf_network_model, name, properties,
 175                             surf_network_model->model_private->maxmin_system,
 176                             sg_bandwidth_factor * bw_initial,
 177                             history,
 178                             state_initial, state_trace,
 179                             bw_initial, bw_trace);
 180
 181   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 182              "Link '%s' declared several times in the platform file.",
 183              name);
 184
 185   nw_link->lat_current = lat_initial;
 186   if (lat_trace)
 187     nw_link->lat_event =
 188         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 189
 190   if (policy == SURF_LINK_FATPIPE)
 191     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 192
 193   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 194   XBT_DEBUG("Create link '%s'",name);
 195
 196   return nw_link;
 197 }
 198
 199 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 200 {
 201   if (link->policy == SURF_LINK_FULLDUPLEX) {
 202     char *link_id;
 203     link_id = bprintf("%s_UP", link->id);
 204     net_create_resource(link_id,
 205                         link->bandwidth,
 206                         link->bandwidth_trace,
 207                         link->latency,
 208                         link->latency_trace,
 209                         link->state,
 210                         link->state_trace, link->policy, link->properties);
 211     xbt_free(link_id);
 212     link_id = bprintf("%s_DOWN", link->id);
 213     net_create_resource(link_id,
 214                         link->bandwidth,
 215                         link->bandwidth_trace,
 216                         link->latency,
 217                         link->latency_trace,
 218                         link->state,
 219                         link->state_trace, link->policy, link->properties);
 220     xbt_free(link_id);
 221   } else {
 222     net_create_resource(link->id,
 223                         link->bandwidth,
 224                         link->bandwidth_trace,
 225                         link->latency,
 226                         link->latency_trace,
 227                         link->state,
 228                         link->state_trace, link->policy, link->properties);
 229   }
 230 }
 231
 232 static void net_add_traces(void)
 233 {
 234   xbt_dict_cursor_t cursor = NULL;
 235   char *trace_name, *elm;
 236
 237   static int called = 0;
 238   if (called)
 239     return;
 240   called = 1;
 241
 242   /* connect all traces relative to network */
 243   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 244     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 245     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 246
 247     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 248                trace_name, elm);
 249     xbt_assert(trace,
 250                "Cannot connect trace %s to link %s: trace undefined",
 251                trace_name, elm);
 252
 253     link->lmm_resource.state_event =
 254         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 255   }
 256
 257   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 258     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 259     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 260
 261     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 262                trace_name, elm);
 263     xbt_assert(trace,
 264                "Cannot connect trace %s to link %s: trace undefined",
 265                trace_name, elm);
 266
 267     link->lmm_resource.power.event =
 268         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 269   }
 270
 271   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 272     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 273     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 274
 275     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 276                trace_name, elm);
 277     xbt_assert(trace,
 278                "Cannot connect trace %s to link %s: trace undefined",
 279                trace_name, elm);
 280
 281     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 282   }
 283 }
 284
 285 static void net_define_callbacks(void)
 286 {
 287   /* Figuring out the network links */
 288   sg_platf_link_add_cb(net_parse_link_init);
 289   sg_platf_postparse_add_cb(net_add_traces);
 290 }
 291
 292 static int net_resource_used(void *resource_id)
 293 {
 294   return lmm_constraint_used(surf_network_model->model_private->maxmin_system, ((surf_resource_lmm_t)
 295                                                      resource_id)->
 296                              constraint);
 297 }
 298
 299 void net_action_recycle(surf_action_t action)
 300 {
 301   return;
 302 }
 303
 304 #ifdef HAVE_LATENCY_BOUND_TRACKING
 305 int net_get_link_latency_limited(surf_action_t action)
 306 {
 307   return action->latency_limited;
 308 }
 309 #endif
 310
 311 double net_action_get_remains(surf_action_t action)
 312 {
 313   XBT_IN("(%p)", action);
 314   /* update remains before return it */
 315   if (surf_network_model->model_private->update_mechanism == UM_LAZY)      /* update remains before return it */
 316     net_update_action_remaining_lazy((surf_action_network_CM02_t)action,
 317         surf_get_clock());
 318   XBT_OUT();
 319   return action->remains;
 320 }
 321
 322 static void net_update_action_remaining_lazy(surf_action_network_CM02_t action, double now)
 323 {
 324   double delta = 0.0;
 325
 326   if (GENERIC_LMM_ACTION(action).suspended != 0)
 327     return;
 328
 329   delta = now - GENERIC_LMM_ACTION(action).last_update;
 330
 331   double_update(&(((surf_action_t)action)->remains),
 332       GENERIC_LMM_ACTION(action).last_value * delta);
 333
 334   if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 335     double_update(&(((surf_action_t)action)->max_duration), delta);
 336
 337   if ((((surf_action_t)action)->remains <= 0) &&
 338       (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 339     ((surf_action_t)action)->finish = surf_get_clock();
 340     surf_network_model->action_state_set((surf_action_t) action,
 341         SURF_ACTION_DONE);
 342
 343     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 344   } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 345       && (((surf_action_t)action)->max_duration <= 0))) {
 346     ((surf_action_t)action)->finish = surf_get_clock();
 347     surf_network_model->action_state_set((surf_action_t) action,
 348         SURF_ACTION_DONE);
 349     surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 350   }
 351
 352   GENERIC_LMM_ACTION(action).last_update = now;
 353   GENERIC_LMM_ACTION(action).last_value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 354 }
 355
 356 static double net_share_resources_full(double now)
 357 {
 358   s_surf_action_lmm_t s_action;
 359   surf_action_network_CM02_t action = NULL;
 360   xbt_swag_t running_actions =
 361       surf_network_model->states.running_action_set;
 362   double min;
 363
 364   min = generic_maxmin_share_resources(running_actions,
 365                                        xbt_swag_offset(s_action,
 366                                                        variable),
 367                                                        surf_network_model->model_private->maxmin_system,
 368                                        network_solve);
 369
 370 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 371
 372   xbt_swag_foreach(action, running_actions) {
 373 #ifdef HAVE_LATENCY_BOUND_TRACKING
 374     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 375       action->latency_limited = 1;
 376     } else {
 377       action->latency_limited = 0;
 378     }
 379 #endif
 380     if (action->latency > 0) {
 381       min = (min < 0) ? action->latency : min(min, action->latency);
 382     }
 383   }
 384
 385   XBT_DEBUG("Min of share resources %f", min);
 386
 387   return min;
 388 }
 389
 390 static double net_share_resources_lazy(double now)
 391 {
 392   surf_action_network_CM02_t action = NULL;
 393   double min = -1;
 394   double value;
 395
 396   XBT_DEBUG
 397       ("Before share resources, the size of modified actions set is %d",
 398        xbt_swag_size(surf_network_model->model_private->modified_set));
 399
 400   lmm_solve(surf_network_model->model_private->maxmin_system);
 401
 402   XBT_DEBUG
 403       ("After share resources, The size of modified actions set is %d",
 404        xbt_swag_size(surf_network_model->model_private->modified_set));
 405
 406   while((action = xbt_swag_extract(surf_network_model->model_private->modified_set))) {
 407     int max_dur_flag = 0;
 408
 409     if (GENERIC_ACTION(action).state_set !=
 410         surf_network_model->states.running_action_set)
 411       continue;
 412
 413     /* bogus priority, skip it */
 414     if (GENERIC_ACTION(action).priority <= 0)
 415       continue;
 416
 417     net_update_action_remaining_lazy(action,now);
 418
 419     min = -1;
 420     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 421     if (value > 0) {
 422       if (GENERIC_ACTION(action).remains > 0) {
 423         value = GENERIC_ACTION(action).remains / value;
 424         min = now + value;
 425       } else {
 426         value = 0.0;
 427         min = now;
 428       }
 429     }
 430
 431     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 432         && (min == -1
 433             || GENERIC_ACTION(action).start +
 434             GENERIC_ACTION(action).max_duration < min)) {
 435       min = GENERIC_ACTION(action).start +
 436           GENERIC_ACTION(action).max_duration;
 437       max_dur_flag = 1;
 438     }
 439
 440     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 441               GENERIC_ACTION(action).start, now + value,
 442               GENERIC_ACTION(action).max_duration);
 443
 444     if (min != -1) {
 445       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 446       surf_action_lmm_heap_insert(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 447       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 448                 now);
 449     } else DIE_IMPOSSIBLE;
 450   }
 451
 452   //hereafter must have already the min value for this resource model
 453   if (xbt_heap_size(surf_network_model->model_private->action_heap) > 0)
 454     min = xbt_heap_maxkey(surf_network_model->model_private->action_heap) - now;
 455   else
 456     min = -1;
 457
 458   XBT_DEBUG("The minimum with the HEAP %lf", min);
 459
 460   return min;
 461 }
 462
 463 static void net_update_actions_state_full(double now, double delta)
 464 {
 465   double deltap = 0.0;
 466   surf_action_network_CM02_t action = NULL;
 467   surf_action_network_CM02_t next_action = NULL;
 468   xbt_swag_t running_actions =
 469       surf_network_model->states.running_action_set;
 470   /*
 471      xbt_swag_t failed_actions =
 472      surf_network_model->states.failed_action_set;
 473    */
 474
 475   xbt_swag_foreach_safe(action, next_action, running_actions) {
 476     deltap = delta;
 477     if (action->latency > 0) {
 478       if (action->latency > deltap) {
 479         double_update(&(action->latency), deltap);
 480         deltap = 0.0;
 481       } else {
 482         double_update(&(deltap), action->latency);
 483         action->latency = 0.0;
 484       }
 485       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 486         lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 487                                    action->weight);
 488     }
 489 #ifdef HAVE_TRACING
 490     if (TRACE_is_enabled()) {
 491       int n = lmm_get_number_of_cnst_from_var(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable);
 492       unsigned int i;
 493       for (i = 0; i < n; i++){
 494         lmm_constraint_t constraint = lmm_get_cnst_from_var(surf_network_model->model_private->maxmin_system,
 495                                                             GENERIC_LMM_ACTION(action).variable,
 496                                                             i);
 497         link_CM02_t link = lmm_constraint_id(constraint);
 498         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 499                                         ((surf_action_t)action)->category,
 500                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 501                                         lmm_get_cnst_weight_from_var(surf_network_model->model_private->maxmin_system,
 502                                             GENERIC_LMM_ACTION(action).variable,
 503                                             i)),
 504                                         now - delta,
 505                                         delta);
 506       }
 507     }
 508 #endif
 509     if (!lmm_get_number_of_cnst_from_var
 510         (surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 511       /* There is actually no link used, hence an infinite bandwidth.
 512        * This happens often when using models like vivaldi.
 513        * In such case, just make sure that the action completes immediately.
 514        */
 515       double_update(&(GENERIC_ACTION(action).remains),
 516                     GENERIC_ACTION(action).remains);
 517     }
 518     double_update(&(GENERIC_ACTION(action).remains),
 519                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 520     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 521       double_update(&(((surf_action_t)action)->max_duration), delta);
 522
 523     if ((GENERIC_ACTION(action).remains <= 0) &&
 524         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 525       ((surf_action_t)action)->finish = surf_get_clock();
 526       surf_network_model->action_state_set((surf_action_t) action,
 527                                            SURF_ACTION_DONE);
 528
 529       if (gap_remove)
 530         gap_remove(action);
 531     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 532                && (((surf_action_t)action)->max_duration <= 0)) {
 533       ((surf_action_t)action)->finish = surf_get_clock();
 534       surf_network_model->action_state_set((surf_action_t) action,
 535                                            SURF_ACTION_DONE);
 536       if (gap_remove)
 537         gap_remove(action);
 538     }
 539   }
 540
 541   return;
 542 }
 543
 544 static void net_update_actions_state_lazy(double now, double delta)
 545 {
 546   surf_action_network_CM02_t action = NULL;
 547
 548   while ((xbt_heap_size(surf_network_model->model_private->action_heap) > 0)
 549          && (double_equals(xbt_heap_maxkey(surf_network_model->model_private->action_heap), now))) {
 550     action = xbt_heap_pop(surf_network_model->model_private->action_heap);
 551     XBT_DEBUG("Action %p: finish", action);
 552     GENERIC_ACTION(action).finish = surf_get_clock();
 553 #ifdef HAVE_TRACING
 554     if (TRACE_is_enabled()) {
 555       int n = lmm_get_number_of_cnst_from_var(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable);
 556       unsigned int i;
 557       for (i = 0; i < n; i++){
 558         lmm_constraint_t constraint = lmm_get_cnst_from_var(surf_network_model->model_private->maxmin_system,
 559                                                             GENERIC_LMM_ACTION(action).variable,
 560                                                             i);
 561         link_CM02_t link = lmm_constraint_id(constraint);
 562         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 563                                         ((surf_action_t)action)->category,
 564                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 565                                             lmm_get_cnst_weight_from_var(surf_network_model->model_private->maxmin_system,
 566                                                 GENERIC_LMM_ACTION(action).variable,
 567                                                 i)),
 568                                         GENERIC_LMM_ACTION(action).last_update,
 569                                         now - GENERIC_LMM_ACTION(action).last_update);
 570       }
 571     }
 572 #endif
 573
 574     // if I am wearing a latency hat
 575     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 576       lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 577                                  action->weight);
 578       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 579       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 580
 581       // if I am wearing a max_duration or normal hat
 582     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 583         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 584       // no need to communicate anymore
 585       // assume that flows that reached max_duration have remaining of 0
 586       GENERIC_ACTION(action).remains = 0;
 587       ((surf_action_t)action)->finish = surf_get_clock();
 588       surf_network_model->action_state_set((surf_action_t) action,
 589                                            SURF_ACTION_DONE);
 590       surf_action_lmm_heap_remove(surf_network_model->model_private->action_heap,(surf_action_lmm_t)action);
 591     }
 592   }
 593   return;
 594 }
 595
 596 static void net_update_resource_state(void *id,
 597                                       tmgr_trace_event_t event_type,
 598                                       double value, double date)
 599 {
 600   link_CM02_t nw_link = id;
 601   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 602   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 603   /*     value, event_type); */
 604
 605   if (event_type == nw_link->lmm_resource.power.event) {
 606     double delta =
 607         sg_weight_S_parameter / value - sg_weight_S_parameter /
 608         (nw_link->lmm_resource.power.peak *
 609          nw_link->lmm_resource.power.scale);
 610     lmm_variable_t var = NULL;
 611     lmm_element_t elem = NULL;
 612     surf_action_network_CM02_t action = NULL;
 613
 614     nw_link->lmm_resource.power.peak = value;
 615     lmm_update_constraint_bound(surf_network_model->model_private->maxmin_system,
 616                                 nw_link->lmm_resource.constraint,
 617                                 sg_bandwidth_factor *
 618                                 (nw_link->lmm_resource.power.peak *
 619                                  nw_link->lmm_resource.power.scale));
 620 #ifdef HAVE_TRACING
 621     TRACE_surf_link_set_bandwidth(date,
 622                                   (char
 623                                    *) (((nw_link->lmm_resource).
 624                                         generic_resource).name),
 625                                   sg_bandwidth_factor *
 626                                   (nw_link->lmm_resource.power.peak *
 627                                    nw_link->lmm_resource.power.scale));
 628 #endif
 629     if (sg_weight_S_parameter > 0) {
 630       while ((var = lmm_get_var_from_cnst
 631               (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 632                &elem))) {
 633         action = lmm_variable_id(var);
 634         action->weight += delta;
 635         if (!(GENERIC_LMM_ACTION(action).suspended))
 636           lmm_update_variable_weight(surf_network_model->model_private->maxmin_system,
 637                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 638       }
 639     }
 640     if (tmgr_trace_event_free(event_type))
 641       nw_link->lmm_resource.power.event = NULL;
 642   } else if (event_type == nw_link->lat_event) {
 643     double delta = value - nw_link->lat_current;
 644     lmm_variable_t var = NULL;
 645     lmm_element_t elem = NULL;
 646     surf_action_network_CM02_t action = NULL;
 647
 648     nw_link->lat_current = value;
 649     while ((var = lmm_get_var_from_cnst
 650             (surf_network_model->model_private->maxmin_system, nw_link->lmm_resource.constraint,
 651              &elem))) {
 652       action = lmm_variable_id(var);
 653       action->lat_current += delta;
 654       action->weight += delta;
 655       if (action->rate < 0)
 656         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 657                                   sg_tcp_gamma / (2.0 *
 658                                                   action->lat_current));
 659       else {
 660         lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 661                                   min(action->rate,
 662                                       sg_tcp_gamma / (2.0 *
 663                                                       action->
 664                                                       lat_current)));
 665
 666         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 667           XBT_INFO("Flow is limited BYBANDWIDTH");
 668         } else {
 669           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 670                    action->lat_current);
 671         }
 672       }
 673       if (!(GENERIC_LMM_ACTION(action).suspended))
 674         lmm_update_variable_weight(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 675                                    action->weight);
 676
 677     }
 678     if (tmgr_trace_event_free(event_type))
 679       nw_link->lat_event = NULL;
 680   } else if (event_type == nw_link->lmm_resource.state_event) {
 681     if (value > 0)
 682       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 683     else {
 684       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 685       lmm_variable_t var = NULL;
 686       lmm_element_t elem = NULL;
 687
 688       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 689       while ((var = lmm_get_var_from_cnst
 690               (surf_network_model->model_private->maxmin_system, cnst, &elem))) {
 691         surf_action_t action = lmm_variable_id(var);
 692
 693         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 694             surf_action_state_get(action) == SURF_ACTION_READY) {
 695           action->finish = date;
 696           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 697         }
 698       }
 699     }
 700     if (tmgr_trace_event_free(event_type))
 701       nw_link->lmm_resource.state_event = NULL;
 702   } else {
 703     XBT_CRITICAL("Unknown event ! \n");
 704     xbt_abort();
 705   }
 706
 707   XBT_DEBUG
 708       ("There were a resource state event, need to update actions related to the constraint (%p)",
 709        nw_link->lmm_resource.constraint);
 710   return;
 711 }
 712
 713
 714 static surf_action_t net_communicate(sg_routing_edge_t src,
 715                                      sg_routing_edge_t dst,
 716                                      double size, double rate)
 717 {
 718   unsigned int i;
 719   link_CM02_t link;
 720   int failed = 0;
 721   surf_action_network_CM02_t action = NULL;
 722   double bandwidth_bound;
 723   double latency = 0.0;
 724   xbt_dynar_t back_route = NULL;
 725   int constraints_per_variable = 0;
 726
 727   xbt_dynar_t route = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
 728
 729   XBT_IN("(%s,%s,%g,%g)", src->name, dst->name, size, rate);
 730
 731   routing_get_route_and_latency(src, dst, &route, &latency);
 732   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 733              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 734              src->name, dst->name);
 735
 736   xbt_dynar_foreach(route, i, link) {
 737     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 738       failed = 1;
 739       break;
 740     }
 741   }
 742   if (sg_network_crosstraffic == 1) {
 743     routing_get_route_and_latency(dst, src, &back_route, NULL);
 744     xbt_dynar_foreach(back_route, i, link) {
 745       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 746         failed = 1;
 747         break;
 748       }
 749     }
 750   }
 751
 752   action =
 753       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 754                       surf_network_model, failed);
 755 #ifdef HAVE_LATENCY_BOUND_TRACKING
 756   action->latency_limited = 0;
 757 #endif
 758   action->weight = action->latency = latency;
 759
 760   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 761   action->rate = rate;
 762   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 763     GENERIC_LMM_ACTION(action).index_heap = -1;
 764     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 765   }
 766
 767   bandwidth_bound = -1.0;
 768   if (sg_weight_S_parameter > 0) {
 769     xbt_dynar_foreach(route, i, link) {
 770       action->weight +=
 771           sg_weight_S_parameter /
 772           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 773     }
 774   }
 775   xbt_dynar_foreach(route, i, link) {
 776     double bb = bandwidth_factor_callback(size) *
 777         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 778     bandwidth_bound =
 779         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 780   }
 781
 782   action->lat_current = action->latency;
 783   action->latency *= latency_factor_callback(size);
 784   action->rate =
 785       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 786   if (gap_append) {
 787     xbt_assert(!xbt_dynar_is_empty(route),
 788                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 789
 790     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 791     gap_append(size, link, action);
 792     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 793               action, src->name, dst->name, action->sender.gap,
 794               action->latency);
 795   }
 796
 797   constraints_per_variable = xbt_dynar_length(route);
 798   if (back_route != NULL)
 799     constraints_per_variable += xbt_dynar_length(back_route);
 800
 801   if (action->latency > 0) {
 802     GENERIC_LMM_ACTION(action).variable =
 803         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 0.0, -1.0,
 804                          constraints_per_variable);
 805     if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 806       // add to the heap the event when the latency is payed
 807       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 808                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 809       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,
 810                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 811     }
 812   } else
 813     GENERIC_LMM_ACTION(action).variable =
 814         lmm_variable_new(surf_network_model->model_private->maxmin_system, action, 1.0, -1.0,
 815                          constraints_per_variable);
 816
 817   if (action->rate < 0) {
 818     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 819                               (action->lat_current > 0) ?
 820                               sg_tcp_gamma / (2.0 *
 821                                               action->lat_current) : -1.0);
 822   } else {
 823     lmm_update_variable_bound(surf_network_model->model_private->maxmin_system, GENERIC_LMM_ACTION(action).variable,
 824                               (action->lat_current > 0) ?
 825                               min(action->rate,
 826                                   sg_tcp_gamma / (2.0 *
 827                                                   action->lat_current))
 828                               : action->rate);
 829   }
 830
 831   xbt_dynar_foreach(route, i, link) {
 832     lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 833                GENERIC_LMM_ACTION(action).variable, 1.0);
 834   }
 835
 836   if (sg_network_crosstraffic == 1) {
 837     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 838     xbt_dynar_foreach(back_route, i, link) {
 839       lmm_expand(surf_network_model->model_private->maxmin_system, link->lmm_resource.constraint,
 840                  GENERIC_LMM_ACTION(action).variable, .05);
 841     }
 842   }
 843
 844   xbt_dynar_free(&route);
 845   XBT_OUT();
 846
 847   return (surf_action_t) action;
 848 }
 849
 850 static xbt_dynar_t net_get_route(void *src, void *dst)
 851 {
 852   xbt_dynar_t route = NULL;
 853   routing_get_route_and_latency(src, dst, &route, NULL);
 854   return route;
 855 }
 856
 857 static double net_get_link_bandwidth(const void *link)
 858 {
 859   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 860   return lmm->power.peak * lmm->power.scale;
 861 }
 862
 863 static double net_get_link_latency(const void *link)
 864 {
 865   return ((link_CM02_t) link)->lat_current;
 866 }
 867
 868 static int net_link_shared(const void *link)
 869 {
 870   return
 871       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 872 }
 873
 874 static void net_finalize(void)
 875 {
 876   lmm_system_free(surf_network_model->model_private->maxmin_system);
 877   surf_network_model->model_private->maxmin_system = NULL;
 878
 879   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
 880     xbt_heap_free(surf_network_model->model_private->action_heap);
 881     xbt_swag_free(surf_network_model->model_private->modified_set);
 882   }
 883
 884   surf_model_exit(surf_network_model);
 885   surf_network_model = NULL;
 886
 887   if (smpi_bw_factor)
 888     xbt_dynar_free(&smpi_bw_factor);
 889   if (smpi_lat_factor)
 890     xbt_dynar_free(&smpi_lat_factor);
 891 }
 892
 893 static void smpi_gap_append(double size, const link_CM02_t link,
 894                             surf_action_network_CM02_t action)
 895 {
 896   const char *src = link->lmm_resource.generic_resource.name;
 897   xbt_fifo_t fifo;
 898   surf_action_network_CM02_t last_action;
 899   double bw;
 900
 901   if (sg_sender_gap > 0.0) {
 902     if (!gap_lookup) {
 903       gap_lookup = xbt_dict_new();
 904     }
 905     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
 906     action->sender.gap = 0.0;
 907     if (fifo && xbt_fifo_size(fifo) > 0) {
 908       /* Compute gap from last send */
 909       last_action =
 910           (surf_action_network_CM02_t)
 911           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 912       bw = net_get_link_bandwidth(link);
 913       action->sender.gap =
 914           last_action->sender.gap + max(sg_sender_gap,
 915                                         last_action->sender.size / bw);
 916       action->latency += action->sender.gap;
 917     }
 918     /* Append action as last send */
 919     action->sender.link_name = link->lmm_resource.generic_resource.name;
 920     fifo =
 921         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
 922                                           action->sender.link_name);
 923     if (!fifo) {
 924       fifo = xbt_fifo_new();
 925       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
 926     }
 927     action->sender.fifo_item = xbt_fifo_push(fifo, action);
 928     action->sender.size = size;
 929   }
 930 }
 931
 932 static void smpi_gap_remove(surf_action_network_CM02_t action)
 933 {
 934   xbt_fifo_t fifo;
 935   size_t size;
 936
 937   if (sg_sender_gap > 0.0 && action->sender.link_name
 938       && action->sender.fifo_item) {
 939     fifo =
 940         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
 941                                           action->sender.link_name);
 942     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
 943     size = xbt_fifo_size(fifo);
 944     if (size == 0) {
 945       xbt_fifo_free(fifo);
 946       xbt_dict_remove(gap_lookup, action->sender.link_name);
 947       size = xbt_dict_length(gap_lookup);
 948       if (size == 0) {
 949         xbt_dict_free(&gap_lookup);
 950       }
 951     }
 952   }
 953 }
 954
 955 static void set_update_mechanism(void)
 956 {
 957   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
 958   int select =
 959       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
 960
 961   if (!strcmp(optim, "Full")) {
 962     surf_network_model->model_private->update_mechanism = UM_FULL;
 963     surf_network_model->model_private->selective_update = select;
 964   } else if (!strcmp(optim, "Lazy")) {
 965     surf_network_model->model_private->update_mechanism = UM_LAZY;
 966     surf_network_model->model_private->selective_update = 1;
 967     xbt_assert((select == 1)
 968                ||
 969                (xbt_cfg_is_default_value
 970                 (_surf_cfg_set, "network/maxmin_selective_update")),
 971                "Disabling selective update while using the lazy update mechanism is dumb!");
 972   } else {
 973     xbt_die("Unsupported optimization (%s) for this model", optim);
 974   }
 975 }
 976
 977 static void surf_network_model_init_internal(void)
 978 {
 979   s_surf_action_network_CM02_t comm;
 980   surf_network_model = surf_model_init();
 981
 982   set_update_mechanism();
 983
 984   surf_network_model->name = "network";
 985   surf_network_model->action_unref = surf_action_unref;
 986   surf_network_model->action_cancel = surf_action_cancel;
 987   surf_network_model->action_recycle = net_action_recycle;
 988
 989   surf_network_model->get_remains = net_action_get_remains;
 990
 991 #ifdef HAVE_LATENCY_BOUND_TRACKING
 992   surf_network_model->get_latency_limited = net_get_link_latency_limited;
 993 #endif
 994 #ifdef HAVE_TRACING
 995   surf_network_model->set_category = surf_action_set_category;
 996 #endif
 997
 998   surf_network_model->model_private->resource_used = net_resource_used;
 999   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
1000     surf_network_model->model_private->share_resources =
1001         net_share_resources_lazy;
1002     surf_network_model->model_private->update_actions_state =
1003         net_update_actions_state_lazy;
1004   } else if (surf_network_model->model_private->update_mechanism == UM_FULL) {
1005     surf_network_model->model_private->share_resources =
1006         net_share_resources_full;
1007     surf_network_model->model_private->update_actions_state =
1008         net_update_actions_state_full;
1009   }
1010
1011   surf_network_model->model_private->update_resource_state =
1012       net_update_resource_state;
1013   surf_network_model->model_private->finalize = net_finalize;
1014
1015   surf_network_model->suspend = surf_action_suspend;
1016   surf_network_model->resume = surf_action_resume;
1017   surf_network_model->is_suspended = surf_action_is_suspended;
1018   surf_cpu_model->set_max_duration = surf_action_set_max_duration;
1019
1020   surf_network_model->extension.network.communicate = net_communicate;
1021   surf_network_model->extension.network.get_route = net_get_route;
1022   surf_network_model->extension.network.get_link_bandwidth =
1023       net_get_link_bandwidth;
1024   surf_network_model->extension.network.get_link_latency =
1025       net_get_link_latency;
1026   surf_network_model->extension.network.link_shared = net_link_shared;
1027   surf_network_model->extension.network.add_traces = net_add_traces;
1028   surf_network_model->extension.network.create_resource =
1029       net_create_resource;
1030
1031   if (!surf_network_model->model_private->maxmin_system)
1032     surf_network_model->model_private->maxmin_system = lmm_system_new(surf_network_model->model_private->selective_update);
1033
1034   routing_model_create(net_create_resource("__loopback__",
1035                                            498000000, NULL, 0.000015, NULL,
1036                                            SURF_RESOURCE_ON, NULL,
1037                                            SURF_LINK_FATPIPE, NULL));
1038
1039   if (surf_network_model->model_private->update_mechanism == UM_LAZY) {
1040     surf_network_model->model_private->action_heap = xbt_heap_new(8, NULL);
1041     xbt_heap_set_update_callback(surf_network_model->model_private->action_heap,
1042                                  surf_action_lmm_update_index_heap);
1043     surf_network_model->model_private->modified_set =
1044         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1045     surf_network_model->model_private->maxmin_system->keep_track = surf_network_model->model_private->modified_set;
1046   }
1047 }
1048
1049 /************************************************************************/
1050 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1051 /************************************************************************/
1052 /* @Inproceedings{smpi_ipdps, */
1053 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1054 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1055 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1056 /*  address={Anchorage (Alaska) USA}, */
1057 /*  month=may, */
1058 /*  year={2011} */
1059 /*  } */
1060 void surf_network_model_init_SMPI(void)
1061 {
1062
1063   if (surf_network_model)
1064     return;
1065
1066   surf_network_model_init_internal();
1067   latency_factor_callback = &smpi_latency_factor;
1068   bandwidth_factor_callback = &smpi_bandwidth_factor;
1069   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1070   gap_append = &smpi_gap_append;
1071   gap_remove = &smpi_gap_remove;
1072   net_define_callbacks();
1073   xbt_dynar_push(model_list, &surf_network_model);
1074   network_solve = lmm_solve;
1075
1076   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1077   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1078 }
1079
1080 /************************************************************************/
1081 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1082 /************************************************************************/
1083 /* @techreport{VELHO:2011:HAL-00646896:1, */
1084 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1085 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1086 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1087 /*      type = {Rapport de recherche}, */
1088 /*      institution = {INRIA}, */
1089 /*      number = {RR-7821}, */
1090 /*      year = {2011}, */
1091 /*      month = Nov, */
1092 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1093 /*  } */
1094 void surf_network_model_init_LegrandVelho(void)
1095 {
1096   if (surf_network_model)
1097     return;
1098
1099   surf_network_model_init_internal();
1100   net_define_callbacks();
1101   xbt_dynar_push(model_list, &surf_network_model);
1102   network_solve = lmm_solve;
1103
1104   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1105                             13.01);
1106   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1107                             0.97);
1108   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1109 }
1110
1111 /***************************************************************************/
1112 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1113 /***************************************************************************/
1114 /* @TechReport{      rr-lip2002-40, */
1115 /*   author        = {Henri Casanova and Loris Marchal}, */
1116 /*   institution   = {LIP}, */
1117 /*   title         = {A Network Model for Simulation of Grid Application}, */
1118 /*   number        = {2002-40}, */
1119 /*   month         = {oct}, */
1120 /*   year          = {2002} */
1121 /* } */
1122 void surf_network_model_init_CM02(void)
1123 {
1124
1125   if (surf_network_model)
1126     return;
1127
1128   surf_network_model_init_internal();
1129   net_define_callbacks();
1130   xbt_dynar_push(model_list, &surf_network_model);
1131   network_solve = lmm_solve;
1132
1133   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1134   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1135                             1.0);
1136   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1137 }
1138
1139 /***************************************************************************/
1140 /* The models from Steven H. Low                                           */
1141 /***************************************************************************/
1142 /* @article{Low03,                                                         */
1143 /*   author={Steven H. Low},                                               */
1144 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1145 /*   year={2003},                                                          */
1146 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1147 /*    volume={11}, number={4},                                             */
1148 /*  }                                                                      */
1149 void surf_network_model_init_Reno(void)
1150 {
1151   if (surf_network_model)
1152     return;
1153
1154   surf_network_model_init_internal();
1155   net_define_callbacks();
1156
1157   xbt_dynar_push(model_list, &surf_network_model);
1158   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1159                                     func_reno_fpi);
1160   network_solve = lagrange_solve;
1161
1162   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1163   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1164                             0.92);
1165   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1166 }
1167
1168
1169 void surf_network_model_init_Reno2(void)
1170 {
1171   if (surf_network_model)
1172     return;
1173
1174   surf_network_model_init_internal();
1175   net_define_callbacks();
1176
1177   xbt_dynar_push(model_list, &surf_network_model);
1178   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1179                                     func_reno2_fpi);
1180   network_solve = lagrange_solve;
1181
1182   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1183   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1184                             0.92);
1185   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1186                             8775);
1187 }
1188
1189 void surf_network_model_init_Vegas(void)
1190 {
1191   if (surf_network_model)
1192     return;
1193
1194   surf_network_model_init_internal();
1195   net_define_callbacks();
1196
1197   xbt_dynar_push(model_list, &surf_network_model);
1198   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1199                                     func_vegas_fpi);
1200   network_solve = lagrange_solve;
1201
1202   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1203   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1204                             0.92);
1205   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1206 }