src/surf/network.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "network_private.h"
  16 #include "xbt/log.h"
  17 #include "xbt/str.h"
  18
  19 #include "surf_private.h"
  20 #include "xbt/dict.h"
  21 #include "maxmin_private.h"
  22 #include "surf/surfxml_parse_values.h"
  23 #include "surf/surf_resource.h"
  24 #include "surf/surf_resource_lmm.h"
  25
  26 #undef GENERIC_LMM_ACTION
  27 #undef GENERIC_ACTION
  28 #define GENERIC_LMM_ACTION(action) (action)->generic_lmm_action
  29 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  30
  31
  32 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  33                                 "Logging specific to the SURF network module");
  34
  35 surf_model_t surf_network_model = NULL;
  36 static lmm_system_t network_maxmin_system = NULL;
  37 static void (*network_solve) (lmm_system_t) = NULL;
  38
  39 xbt_dynar_t smpi_bw_factor = NULL;
  40 xbt_dynar_t smpi_lat_factor = NULL;
  41
  42 typedef struct s_smpi_factor *smpi_factor_t;
  43 typedef struct s_smpi_factor {
  44   long factor;
  45   double value;
  46 } s_smpi_factor_t;
  47
  48 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 e_UM_t network_update_mechanism = UM_UNDEFINED;
  59 static int net_selective_update = 0;
  60
  61 static int net_action_is_suspended(surf_action_t action);
  62 static void update_action_remaining_lazy(double now);
  63
  64 static xbt_swag_t net_modified_set = NULL;
  65 static xbt_heap_t net_action_heap = NULL;
  66
  67 /* added to manage the communication action's heap */
  68 static void net_action_update_index_heap(void *action, int i)
  69 {
  70   ((surf_action_network_CM02_t) action)->index_heap = i;
  71 }
  72
  73 /* insert action on heap using a given key and a hat (heap_action_type)
  74  * a hat can be of three types for communications:
  75  *
  76  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  77  * LATENCY = this is a heap entry to warn us when the latency is payed
  78  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  79  */
  80 static void heap_insert(surf_action_network_CM02_t action, double key,
  81                         enum heap_action_type hat)
  82 {
  83   action->hat = hat;
  84   xbt_heap_push(net_action_heap, action, key);
  85 }
  86
  87 static void heap_remove(surf_action_network_CM02_t action)
  88 {
  89   action->hat = NOTSET;
  90   if (((surf_action_network_CM02_t) action)->index_heap >= 0) {
  91     xbt_heap_remove(net_action_heap, action->index_heap);
  92   }
  93 }
  94
  95 /******************************************************************************/
  96 /*                           Factors callbacks                                */
  97 /******************************************************************************/
  98 static double constant_latency_factor(double size)
  99 {
 100   return sg_latency_factor;
 101 }
 102
 103 static double constant_bandwidth_factor(double size)
 104 {
 105   return sg_bandwidth_factor;
 106 }
 107
 108 static double constant_bandwidth_constraint(double rate, double bound,
 109                                             double size)
 110 {
 111   return rate;
 112 }
 113
 114 /**********************/
 115 /*   SMPI callbacks   */
 116 /**********************/
 117 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 118 {
 119   char *value = NULL;
 120   unsigned int iter = 0;
 121   s_smpi_factor_t fact;
 122   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 123
 124   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 125   radical_elements = xbt_str_split(smpi_coef_string, ";");
 126   xbt_dynar_foreach(radical_elements, iter, value) {
 127
 128     radical_elements2 = xbt_str_split(value, ":");
 129     if (xbt_dynar_length(radical_elements2) != 2)
 130       xbt_die("Malformed radical for smpi factor!");
 131     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 132     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 133     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 134     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 135     xbt_dynar_free(&radical_elements2);
 136   }
 137   xbt_dynar_free(&radical_elements);
 138   return smpi_factor;
 139 }
 140
 141 static double smpi_bandwidth_factor(double size)
 142 {
 143   if (!smpi_bw_factor)
 144     smpi_bw_factor =
 145         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 146
 147   unsigned int iter = 0;
 148   s_smpi_factor_t fact;
 149   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 150     if (size >= fact.factor) {
 151       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 152       return fact.value;
 153     }
 154   }
 155
 156   return 1.0;
 157 }
 158
 159 static double smpi_latency_factor(double size)
 160 {
 161   if (!smpi_lat_factor)
 162     smpi_lat_factor =
 163         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 164
 165   unsigned int iter = 0;
 166   s_smpi_factor_t fact;
 167   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 168     if (size >= fact.factor) {
 169       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 170       return fact.value;
 171     }
 172   }
 173
 174   return 1.0;
 175 }
 176
 177 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 178
 179 static double smpi_bandwidth_constraint(double rate, double bound,
 180                                         double size)
 181 {
 182   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 183 }
 184
 185 static double (*latency_factor_callback) (double) =
 186     &constant_latency_factor;
 187 static double (*bandwidth_factor_callback) (double) =
 188     &constant_bandwidth_factor;
 189 static double (*bandwidth_constraint_callback) (double, double, double) =
 190     &constant_bandwidth_constraint;
 191
 192 static void (*gap_append) (double, const link_CM02_t,
 193                            surf_action_network_CM02_t) = NULL;
 194 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 195
 196 static void *net_create_resource(const char *name,
 197                                  double bw_initial,
 198                                  tmgr_trace_t bw_trace,
 199                                  double lat_initial,
 200                                  tmgr_trace_t lat_trace,
 201                                  e_surf_resource_state_t
 202                                  state_initial,
 203                                  tmgr_trace_t state_trace,
 204                                  e_surf_link_sharing_policy_t
 205                                  policy, xbt_dict_t properties)
 206 {
 207   link_CM02_t nw_link = (link_CM02_t)
 208       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 209                             surf_network_model, name, properties,
 210                             network_maxmin_system,
 211                             sg_bandwidth_factor * bw_initial,
 212                             history,
 213                             state_initial, state_trace,
 214                             bw_initial, bw_trace);
 215
 216   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 217              "Link '%s' declared several times in the platform file.",
 218              name);
 219
 220   nw_link->lat_current = lat_initial;
 221   if (lat_trace)
 222     nw_link->lat_event =
 223         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 224
 225   if (policy == SURF_LINK_FATPIPE)
 226     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 227
 228   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 229
 230   return nw_link;
 231 }
 232
 233 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 234 {
 235   if (link->policy == SURF_LINK_FULLDUPLEX) {
 236     char *link_id;
 237     link_id = bprintf("%s_UP", link->id);
 238     net_create_resource(link_id,
 239                         link->bandwidth,
 240                         link->bandwidth_trace,
 241                         link->latency,
 242                         link->latency_trace,
 243                         link->state,
 244                         link->state_trace, link->policy, link->properties);
 245     xbt_free(link_id);
 246     link_id = bprintf("%s_DOWN", link->id);
 247     net_create_resource(link_id,
 248                         link->bandwidth,
 249                         link->bandwidth_trace,
 250                         link->latency,
 251                         link->latency_trace,
 252                         link->state,
 253                         link->state_trace, link->policy, link->properties);
 254     xbt_free(link_id);
 255   } else {
 256     net_create_resource(link->id,
 257                         link->bandwidth,
 258                         link->bandwidth_trace,
 259                         link->latency,
 260                         link->latency_trace,
 261                         link->state,
 262                         link->state_trace, link->policy, link->properties);
 263   }
 264 }
 265
 266 static void net_add_traces(void)
 267 {
 268   xbt_dict_cursor_t cursor = NULL;
 269   char *trace_name, *elm;
 270
 271   static int called = 0;
 272   if (called)
 273     return;
 274   called = 1;
 275
 276   /* connect all traces relative to network */
 277   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 278     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 279     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 280
 281     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 282                trace_name, elm);
 283     xbt_assert(trace,
 284                "Cannot connect trace %s to link %s: trace undefined",
 285                trace_name, elm);
 286
 287     link->lmm_resource.state_event =
 288         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 289   }
 290
 291   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 292     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 293     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 294
 295     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 296                trace_name, elm);
 297     xbt_assert(trace,
 298                "Cannot connect trace %s to link %s: trace undefined",
 299                trace_name, elm);
 300
 301     link->lmm_resource.power.event =
 302         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 303   }
 304
 305   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 306     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 307     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 308
 309     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 310                trace_name, elm);
 311     xbt_assert(trace,
 312                "Cannot connect trace %s to link %s: trace undefined",
 313                trace_name, elm);
 314
 315     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 316   }
 317 }
 318
 319 static void net_define_callbacks(void)
 320 {
 321   /* Figuring out the network links */
 322   sg_platf_link_add_cb(net_parse_link_init);
 323   sg_platf_postparse_add_cb(net_add_traces);
 324 }
 325
 326 static int net_resource_used(void *resource_id)
 327 {
 328   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 329                                                      resource_id)->
 330                              constraint);
 331 }
 332
 333 static int net_action_unref(surf_action_t action)
 334 {
 335   action->refcount--;
 336   if (!action->refcount) {
 337     xbt_swag_remove(action, action->state_set);
 338     if (((surf_action_lmm_t)action)->variable) {
 339       lmm_variable_free(network_maxmin_system,
 340                         ((surf_action_lmm_t) action)->variable);
 341     }
 342     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 343       heap_remove((surf_action_network_CM02_t) action);
 344       xbt_swag_remove(action, net_modified_set);
 345     }
 346 #ifdef HAVE_TRACING
 347     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 348     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 349     xbt_free(action->category);
 350 #endif
 351     surf_action_free(&action);
 352     return 1;
 353   }
 354   return 0;
 355 }
 356
 357
 358
 359 static void net_action_cancel(surf_action_t action)
 360 {
 361   XBT_DEBUG("cancel action %p", action);
 362   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 363   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 364     xbt_swag_remove(action, net_modified_set);
 365     heap_remove((surf_action_network_CM02_t) action);
 366   }
 367 }
 368
 369 void net_action_recycle(surf_action_t action)
 370 {
 371   return;
 372 }
 373
 374 #ifdef HAVE_LATENCY_BOUND_TRACKING
 375 int net_get_link_latency_limited(surf_action_t action)
 376 {
 377   return action->latency_limited;
 378 }
 379 #endif
 380
 381 double net_action_get_remains(surf_action_t action)
 382 {
 383   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 384     update_action_remaining_lazy(surf_get_clock());
 385   return action->remains;
 386 }
 387
 388 static void update_action_remaining_lazy(double now)
 389 {
 390   surf_action_network_CM02_t action = NULL;
 391   double delta = 0.0;
 392
 393   xbt_swag_foreach(action, net_modified_set) {
 394
 395     if (GENERIC_LMM_ACTION(action).suspended != 0) {
 396       continue;
 397     }
 398
 399     delta = now - action->last_update;
 400
 401     double_update(&(((surf_action_t)action)->remains),
 402                   lmm_variable_getvalue(((surf_action_lmm_t) action)->variable) * delta);
 403
 404     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 405       double_update(&(((surf_action_t)action)->max_duration), delta);
 406
 407     if ((((surf_action_t)action)->remains <= 0) &&
 408         (lmm_get_variable_weight(((surf_action_lmm_t)action)->variable) > 0)) {
 409       ((surf_action_t)action)->finish = surf_get_clock();
 410       surf_network_model->action_state_set((surf_action_t) action,
 411                                            SURF_ACTION_DONE);
 412       heap_remove(action);
 413     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 414                && (((surf_action_t)action)->max_duration <= 0))) {
 415       ((surf_action_t)action)->finish = surf_get_clock();
 416       surf_network_model->action_state_set((surf_action_t) action,
 417                                            SURF_ACTION_DONE);
 418       heap_remove(action);
 419     }
 420
 421     action->last_update = now;
 422   }
 423 }
 424
 425 static double net_share_resources_full(double now)
 426 {
 427   s_surf_action_lmm_t s_action;
 428   surf_action_network_CM02_t action = NULL;
 429   xbt_swag_t running_actions =
 430       surf_network_model->states.running_action_set;
 431   double min;
 432
 433   min = generic_maxmin_share_resources(running_actions,
 434                                        xbt_swag_offset(s_action,
 435                                                        variable),
 436                                        network_maxmin_system,
 437                                        network_solve);
 438
 439 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 440
 441   xbt_swag_foreach(action, running_actions) {
 442 #ifdef HAVE_LATENCY_BOUND_TRACKING
 443     if (lmm_is_variable_limited_by_latency(action->variable)) {
 444       GENERIC_LMM_ACTION(action).latency_limited = 1;
 445     } else {
 446       GENERIC_LMM_ACTION(action).latency_limited = 0;
 447     }
 448 #endif
 449     if (action->latency > 0) {
 450       min = (min < 0) ? action->latency : min(min, action->latency);
 451     }
 452   }
 453
 454   XBT_DEBUG("Min of share resources %f", min);
 455
 456   return min;
 457 }
 458
 459 static double net_share_resources_lazy(double now)
 460 {
 461   surf_action_network_CM02_t action = NULL;
 462   double min = -1;
 463   double value;
 464
 465   XBT_DEBUG
 466       ("Before share resources, the size of modified actions set is %d",
 467        xbt_swag_size(net_modified_set));
 468   update_action_remaining_lazy(now);
 469
 470   lmm_solve(network_maxmin_system);
 471
 472   XBT_DEBUG
 473       ("After share resources, The size of modified actions set is %d",
 474        xbt_swag_size(net_modified_set));
 475
 476   xbt_swag_foreach(action, net_modified_set) {
 477     int max_dur_flag = 0;
 478
 479     if (GENERIC_ACTION(action).state_set !=
 480         surf_network_model->states.running_action_set)
 481       continue;
 482
 483     /* bogus priority, skip it */
 484     if (GENERIC_ACTION(action).priority <= 0)
 485       continue;
 486
 487     min = -1;
 488     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 489     if (value > 0) {
 490       if (GENERIC_ACTION(action).remains > 0) {
 491         value = GENERIC_ACTION(action).remains / value;
 492         min = now + value;
 493       } else {
 494         value = 0.0;
 495         min = now;
 496       }
 497     }
 498
 499     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 500         && (min == -1
 501             || GENERIC_ACTION(action).start +
 502             GENERIC_ACTION(action).max_duration < min)) {
 503       min = GENERIC_ACTION(action).start +
 504           GENERIC_ACTION(action).max_duration;
 505       max_dur_flag = 1;
 506     }
 507
 508     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 509               GENERIC_ACTION(action).start, now + value,
 510               GENERIC_ACTION(action).max_duration);
 511
 512     if (action->index_heap >= 0) {
 513       heap_remove((surf_action_network_CM02_t) action);
 514     }
 515
 516     if (min != -1) {
 517       heap_insert((surf_action_network_CM02_t) action, min,
 518                   max_dur_flag ? MAX_DURATION : NORMAL);
 519       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 520                 now);
 521     }
 522   }
 523
 524   //hereafter must have already the min value for this resource model
 525   if (xbt_heap_size(net_action_heap) > 0) {
 526     min = xbt_heap_maxkey(net_action_heap) - now;
 527   } else {
 528     min = -1;
 529   }
 530
 531   XBT_DEBUG("The minimum with the HEAP %lf", min);
 532
 533   return min;
 534 }
 535
 536 static void net_update_actions_state_full(double now, double delta)
 537 {
 538   double deltap = 0.0;
 539   surf_action_network_CM02_t action = NULL;
 540   surf_action_network_CM02_t next_action = NULL;
 541   xbt_swag_t running_actions =
 542       surf_network_model->states.running_action_set;
 543   /*
 544      xbt_swag_t failed_actions =
 545      surf_network_model->states.failed_action_set;
 546    */
 547
 548   xbt_swag_foreach_safe(action, next_action, running_actions) {
 549     deltap = delta;
 550     if (action->latency > 0) {
 551       if (action->latency > deltap) {
 552         double_update(&(action->latency), deltap);
 553         deltap = 0.0;
 554       } else {
 555         double_update(&(deltap), action->latency);
 556         action->latency = 0.0;
 557       }
 558       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 559         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 560                                    action->weight);
 561     }
 562 #ifdef HAVE_TRACING
 563     if (TRACE_is_enabled()) {
 564       xbt_dynar_t route = NULL;
 565       routing_get_route_and_latency(action->src_name, action->dst_name,
 566                                     &route, NULL);
 567       link_CM02_t link;
 568       unsigned int i;
 569       xbt_dynar_foreach(route, i, link) {
 570         TRACE_surf_link_set_utilization(link->lmm_resource.
 571                                         generic_resource.name,
 572                                         (((surf_action_t)action)->data,
 573                                         (surf_action_t) action,
 574                                         lmm_variable_getvalue(action->
 575                                                               variable),
 576                                         now - delta, delta);
 577       }
 578     }
 579 #endif
 580     if (!lmm_get_number_of_cnst_from_var
 581         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 582       /* There is actually no link used, hence an infinite bandwidth.
 583        * This happens often when using models like vivaldi.
 584        * In such case, just make sure that the action completes immediately.
 585        */
 586       double_update(&(GENERIC_ACTION(action).remains),
 587                     GENERIC_ACTION(action).remains);
 588     }
 589     double_update(&(GENERIC_ACTION(action).remains),
 590                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 591     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 592       double_update(&(((surf_action_t)action)->max_duration), delta);
 593
 594     if ((GENERIC_ACTION(action).remains <= 0) &&
 595         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 596       ((surf_action_t)action)->finish = surf_get_clock();
 597       surf_network_model->action_state_set((surf_action_t) action,
 598                                            SURF_ACTION_DONE);
 599
 600       if (gap_remove)
 601         gap_remove(action);
 602     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 603                && (((surf_action_t)action)->max_duration <= 0)) {
 604       ((surf_action_t)action)->finish = surf_get_clock();
 605       surf_network_model->action_state_set((surf_action_t) action,
 606                                            SURF_ACTION_DONE);
 607       if (gap_remove)
 608         gap_remove(action);
 609     }
 610   }
 611
 612   return;
 613 }
 614
 615 static void net_update_actions_state_lazy(double now, double delta)
 616 {
 617   surf_action_network_CM02_t action = NULL;
 618
 619   while ((xbt_heap_size(net_action_heap) > 0)
 620          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 621     action = xbt_heap_pop(net_action_heap);
 622     XBT_DEBUG("Action %p: finish", action);
 623     GENERIC_ACTION(action).finish = surf_get_clock();
 624
 625     // if I am wearing a latency hat
 626     if (action->hat == LATENCY) {
 627       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 628                                  action->weight);
 629       heap_remove(action);
 630       action->last_update = surf_get_clock();
 631
 632       // if I am wearing a max_duration or normal hat
 633     } else if (action->hat == MAX_DURATION || action->hat == NORMAL) {
 634       // no need to communicate anymore
 635       // assume that flows that reached max_duration have remaining of 0
 636       GENERIC_ACTION(action).remains = 0;
 637       ((surf_action_t)action)->finish = surf_get_clock();
 638       surf_network_model->action_state_set((surf_action_t) action,
 639                                            SURF_ACTION_DONE);
 640       heap_remove(action);
 641     }
 642   }
 643   return;
 644 }
 645
 646 static void net_update_resource_state(void *id,
 647                                       tmgr_trace_event_t event_type,
 648                                       double value, double date)
 649 {
 650   link_CM02_t nw_link = id;
 651   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 652   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 653   /*     value, event_type); */
 654
 655   if (event_type == nw_link->lmm_resource.power.event) {
 656     double delta =
 657         sg_weight_S_parameter / value - sg_weight_S_parameter /
 658         (nw_link->lmm_resource.power.peak *
 659          nw_link->lmm_resource.power.scale);
 660     lmm_variable_t var = NULL;
 661     lmm_element_t elem = NULL;
 662     surf_action_network_CM02_t action = NULL;
 663
 664     nw_link->lmm_resource.power.peak = value;
 665     lmm_update_constraint_bound(network_maxmin_system,
 666                                 nw_link->lmm_resource.constraint,
 667                                 sg_bandwidth_factor *
 668                                 (nw_link->lmm_resource.power.peak *
 669                                  nw_link->lmm_resource.power.scale));
 670 #ifdef HAVE_TRACING
 671     TRACE_surf_link_set_bandwidth(date,
 672                                   (char
 673                                    *) (((nw_link->lmm_resource).
 674                                         generic_resource).name),
 675                                   sg_bandwidth_factor *
 676                                   (nw_link->lmm_resource.power.peak *
 677                                    nw_link->lmm_resource.power.scale));
 678 #endif
 679     if (sg_weight_S_parameter > 0) {
 680       while ((var = lmm_get_var_from_cnst
 681               (network_maxmin_system, nw_link->lmm_resource.constraint,
 682                &elem))) {
 683         action = lmm_variable_id(var);
 684         action->weight += delta;
 685         if (!(GENERIC_LMM_ACTION(action).suspended))
 686           lmm_update_variable_weight(network_maxmin_system,
 687                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 688       }
 689     }
 690     if (tmgr_trace_event_free(event_type))
 691       nw_link->lmm_resource.power.event = NULL;
 692   } else if (event_type == nw_link->lat_event) {
 693     double delta = value - nw_link->lat_current;
 694     lmm_variable_t var = NULL;
 695     lmm_element_t elem = NULL;
 696     surf_action_network_CM02_t action = NULL;
 697
 698     nw_link->lat_current = value;
 699     while ((var = lmm_get_var_from_cnst
 700             (network_maxmin_system, nw_link->lmm_resource.constraint,
 701              &elem))) {
 702       action = lmm_variable_id(var);
 703       action->lat_current += delta;
 704       action->weight += delta;
 705       if (action->rate < 0)
 706         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 707                                   sg_tcp_gamma / (2.0 *
 708                                                   action->lat_current));
 709       else {
 710         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 711                                   min(action->rate,
 712                                       sg_tcp_gamma / (2.0 *
 713                                                       action->
 714                                                       lat_current)));
 715
 716         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 717           XBT_INFO("Flow is limited BYBANDWIDTH");
 718         } else {
 719           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 720                    action->lat_current);
 721         }
 722       }
 723       if (!(GENERIC_LMM_ACTION(action).suspended))
 724         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 725                                    action->weight);
 726
 727     }
 728     if (tmgr_trace_event_free(event_type))
 729       nw_link->lat_event = NULL;
 730   } else if (event_type == nw_link->lmm_resource.state_event) {
 731     if (value > 0)
 732       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 733     else {
 734       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 735       lmm_variable_t var = NULL;
 736       lmm_element_t elem = NULL;
 737
 738       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 739       while ((var = lmm_get_var_from_cnst
 740               (network_maxmin_system, cnst, &elem))) {
 741         surf_action_t action = lmm_variable_id(var);
 742
 743         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 744             surf_action_state_get(action) == SURF_ACTION_READY) {
 745           action->finish = date;
 746           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 747         }
 748       }
 749     }
 750     if (tmgr_trace_event_free(event_type))
 751       nw_link->lmm_resource.state_event = NULL;
 752   } else {
 753     XBT_CRITICAL("Unknown event ! \n");
 754     xbt_abort();
 755   }
 756
 757   XBT_DEBUG
 758       ("There were a resource state event, need to update actions related to the constraint (%p)",
 759        nw_link->lmm_resource.constraint);
 760   return;
 761 }
 762
 763
 764 static surf_action_t net_communicate(const char *src_name,
 765                                      const char *dst_name, double size,
 766                                      double rate)
 767 {
 768   unsigned int i;
 769   link_CM02_t link;
 770   int failed = 0;
 771   surf_action_network_CM02_t action = NULL;
 772   double bandwidth_bound;
 773   double latency = 0.0;
 774   xbt_dynar_t back_route = NULL;
 775   int constraints_per_variable = 0;
 776
 777   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 778
 779   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 780
 781   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 782   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 783              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 784              src_name, dst_name);
 785
 786   xbt_dynar_foreach(route, i, link) {
 787     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 788       failed = 1;
 789       break;
 790     }
 791   }
 792   if (sg_network_crosstraffic == 1) {
 793     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 794     xbt_dynar_foreach(back_route, i, link) {
 795       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 796         failed = 1;
 797         break;
 798       }
 799     }
 800   }
 801
 802   action =
 803       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 804                       surf_network_model, failed);
 805 #ifdef HAVE_LATENCY_BOUND_TRACKING
 806   (GENERIC_LMM_ACTION(action)).latency_limited = 0;
 807 #endif
 808   action->weight = action->latency = latency;
 809
 810   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 811   action->rate = rate;
 812   if (network_update_mechanism == UM_LAZY) {
 813     action->index_heap = -1;
 814     action->last_update = surf_get_clock();
 815   }
 816
 817   bandwidth_bound = -1.0;
 818   if (sg_weight_S_parameter > 0) {
 819     xbt_dynar_foreach(route, i, link) {
 820       action->weight +=
 821           sg_weight_S_parameter /
 822           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 823     }
 824   }
 825   xbt_dynar_foreach(route, i, link) {
 826     double bb = bandwidth_factor_callback(size) *
 827         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 828     bandwidth_bound =
 829         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 830   }
 831
 832   action->lat_current = action->latency;
 833   action->latency *= latency_factor_callback(size);
 834   action->rate =
 835       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 836   if (gap_append) {
 837     xbt_assert(!xbt_dynar_is_empty(route),
 838                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 839
 840     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 841     gap_append(size, link, action);
 842     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 843               action, src_name, dst_name, action->sender.gap,
 844               action->latency);
 845   }
 846
 847   constraints_per_variable = xbt_dynar_length(route);
 848   if (back_route != NULL)
 849     constraints_per_variable += xbt_dynar_length(back_route);
 850
 851   if (action->latency > 0) {
 852     GENERIC_LMM_ACTION(action).variable =
 853         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 854                          constraints_per_variable);
 855     if (network_update_mechanism == UM_LAZY) {
 856       // add to the heap the event when the latency is payed
 857       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 858                 action->latency + action->last_update);
 859       heap_insert(action, action->latency + action->last_update,
 860                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 861     }
 862   } else
 863     GENERIC_LMM_ACTION(action).variable =
 864         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 865                          constraints_per_variable);
 866
 867   if (action->rate < 0) {
 868     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 869                               (action->lat_current > 0) ?
 870                               sg_tcp_gamma / (2.0 *
 871                                               action->lat_current) : -1.0);
 872   } else {
 873     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 874                               (action->lat_current > 0) ?
 875                               min(action->rate,
 876                                   sg_tcp_gamma / (2.0 *
 877                                                   action->lat_current))
 878                               : action->rate);
 879   }
 880
 881   xbt_dynar_foreach(route, i, link) {
 882     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 883                GENERIC_LMM_ACTION(action).variable, 1.0);
 884   }
 885
 886   if (sg_network_crosstraffic == 1) {
 887     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 888     xbt_dynar_foreach(back_route, i, link) {
 889       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 890                  GENERIC_LMM_ACTION(action).variable, .05);
 891     }
 892   }
 893 #ifdef HAVE_TRACING
 894   if (TRACE_is_enabled()) {
 895     action->src_name = xbt_strdup(src_name);
 896     action->dst_name = xbt_strdup(dst_name);
 897   } else {
 898     action->src_name = action->dst_name = NULL;
 899   }
 900 #endif
 901
 902   xbt_dynar_free(&route);
 903   XBT_OUT();
 904
 905   return (surf_action_t) action;
 906 }
 907
 908 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 909 {
 910   xbt_dynar_t route = NULL;
 911   routing_get_route_and_latency(src, dst, &route, NULL);
 912   return route;
 913 }
 914
 915 static double net_get_link_bandwidth(const void *link)
 916 {
 917   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 918   return lmm->power.peak * lmm->power.scale;
 919 }
 920
 921 static double net_get_link_latency(const void *link)
 922 {
 923   return ((link_CM02_t) link)->lat_current;
 924 }
 925
 926 static int net_link_shared(const void *link)
 927 {
 928   return
 929       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 930 }
 931
 932 static void net_action_suspend(surf_action_t action)
 933 {
 934   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 935   lmm_update_variable_weight(network_maxmin_system,
 936                              ((surf_action_network_CM02_t)
 937                               action)->generic_lmm_action.variable, 0.0);
 938
 939   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 940     heap_remove((surf_action_network_CM02_t) action);
 941 }
 942
 943 static void net_action_resume(surf_action_t action)
 944 {
 945   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 946     lmm_update_variable_weight(network_maxmin_system,
 947                                ((surf_action_network_CM02_t)
 948                                 action)->generic_lmm_action.variable,
 949                                ((surf_action_network_CM02_t)
 950                                 action)->weight);
 951     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 952     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 953       heap_remove((surf_action_network_CM02_t) action);
 954   }
 955 }
 956
 957 static int net_action_is_suspended(surf_action_t action)
 958 {
 959   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 960 }
 961
 962 void net_action_set_max_duration(surf_action_t action, double duration)
 963 {
 964   action->max_duration = duration;
 965   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 966     heap_remove((surf_action_network_CM02_t) action);
 967 }
 968
 969 #ifdef HAVE_TRACING
 970 static void net_action_set_category(surf_action_t action,
 971                                     const char *category)
 972 {
 973   action->category = xbt_strdup(category);
 974 }
 975 #endif
 976
 977 static void net_finalize(void)
 978 {
 979   surf_model_exit(surf_network_model);
 980   surf_network_model = NULL;
 981
 982   lmm_system_free(network_maxmin_system);
 983   network_maxmin_system = NULL;
 984
 985   if (network_update_mechanism == UM_LAZY) {
 986     xbt_heap_free(net_action_heap);
 987     xbt_swag_free(net_modified_set);
 988   }
 989
 990   if (smpi_bw_factor)
 991     xbt_dynar_free(&smpi_bw_factor);
 992   if (smpi_lat_factor)
 993     xbt_dynar_free(&smpi_lat_factor);
 994 }
 995
 996 static void smpi_gap_append(double size, const link_CM02_t link,
 997                             surf_action_network_CM02_t action)
 998 {
 999   const char *src = link->lmm_resource.generic_resource.name;
1000   xbt_fifo_t fifo;
1001   surf_action_network_CM02_t last_action;
1002   double bw;
1003
1004   if (sg_sender_gap > 0.0) {
1005     if (!gap_lookup) {
1006       gap_lookup = xbt_dict_new();
1007     }
1008     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1009     action->sender.gap = 0.0;
1010     if (fifo && xbt_fifo_size(fifo) > 0) {
1011       /* Compute gap from last send */
1012       last_action =
1013           (surf_action_network_CM02_t)
1014           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1015       bw = net_get_link_bandwidth(link);
1016       action->sender.gap =
1017           last_action->sender.gap + max(sg_sender_gap,
1018                                         last_action->sender.size / bw);
1019       action->latency += action->sender.gap;
1020     }
1021     /* Append action as last send */
1022     action->sender.link_name = link->lmm_resource.generic_resource.name;
1023     fifo =
1024         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1025                                           action->sender.link_name);
1026     if (!fifo) {
1027       fifo = xbt_fifo_new();
1028       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1029     }
1030     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1031     action->sender.size = size;
1032   }
1033 }
1034
1035 static void smpi_gap_remove(surf_action_network_CM02_t action)
1036 {
1037   xbt_fifo_t fifo;
1038   size_t size;
1039
1040   if (sg_sender_gap > 0.0 && action->sender.link_name
1041       && action->sender.fifo_item) {
1042     fifo =
1043         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1044                                           action->sender.link_name);
1045     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1046     size = xbt_fifo_size(fifo);
1047     if (size == 0) {
1048       xbt_fifo_free(fifo);
1049       xbt_dict_remove(gap_lookup, action->sender.link_name);
1050       size = xbt_dict_length(gap_lookup);
1051       if (size == 0) {
1052         xbt_dict_free(&gap_lookup);
1053       }
1054     }
1055   }
1056 }
1057
1058 static void surf_network_model_init_internal(void)
1059 {
1060   s_surf_action_network_CM02_t comm;
1061   surf_network_model = surf_model_init();
1062
1063   surf_network_model->name = "network";
1064   surf_network_model->action_unref = net_action_unref;
1065   surf_network_model->action_cancel = net_action_cancel;
1066   surf_network_model->action_recycle = net_action_recycle;
1067   surf_network_model->get_remains = net_action_get_remains;
1068 #ifdef HAVE_LATENCY_BOUND_TRACKING
1069   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1070 #endif
1071 #ifdef HAVE_TRACING
1072   surf_network_model->set_category = net_action_set_category;
1073 #endif
1074
1075   surf_network_model->model_private->resource_used = net_resource_used;
1076   if (network_update_mechanism == UM_LAZY) {
1077     surf_network_model->model_private->share_resources =
1078         net_share_resources_lazy;
1079     surf_network_model->model_private->update_actions_state =
1080         net_update_actions_state_lazy;
1081   } else if (network_update_mechanism == UM_FULL) {
1082     surf_network_model->model_private->share_resources =
1083         net_share_resources_full;
1084     surf_network_model->model_private->update_actions_state =
1085         net_update_actions_state_full;
1086   }
1087
1088   surf_network_model->model_private->update_resource_state =
1089       net_update_resource_state;
1090   surf_network_model->model_private->finalize = net_finalize;
1091
1092   surf_network_model->suspend = net_action_suspend;
1093   surf_network_model->resume = net_action_resume;
1094   surf_network_model->is_suspended = net_action_is_suspended;
1095   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1096
1097   surf_network_model->extension.network.communicate = net_communicate;
1098   surf_network_model->extension.network.get_route = net_get_route;
1099   surf_network_model->extension.network.get_link_bandwidth =
1100       net_get_link_bandwidth;
1101   surf_network_model->extension.network.get_link_latency =
1102       net_get_link_latency;
1103   surf_network_model->extension.network.link_shared = net_link_shared;
1104   surf_network_model->extension.network.add_traces = net_add_traces;
1105   surf_network_model->extension.network.create_resource =
1106       net_create_resource;
1107
1108   if (!network_maxmin_system)
1109     network_maxmin_system = lmm_system_new(net_selective_update);
1110
1111   routing_model_create(sizeof(link_CM02_t),
1112                        net_create_resource("__loopback__",
1113                                            498000000, NULL, 0.000015, NULL,
1114                                            SURF_RESOURCE_ON, NULL,
1115                                            SURF_LINK_FATPIPE, NULL));
1116
1117   if (network_update_mechanism == UM_LAZY) {
1118     net_action_heap = xbt_heap_new(8, NULL);
1119     xbt_heap_set_update_callback(net_action_heap,
1120                                  net_action_update_index_heap);
1121     net_modified_set =
1122         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1123     network_maxmin_system->keep_track = net_modified_set;
1124   }
1125 }
1126
1127 static void set_update_mechanism(void)
1128 {
1129 #ifdef HAVE_TRACING
1130   TRACE_set_network_update_mechanism();
1131 #endif
1132
1133   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1134   int select =
1135       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1136
1137   if (!strcmp(optim, "Full")) {
1138     network_update_mechanism = UM_FULL;
1139     net_selective_update = select;
1140   } else if (!strcmp(optim, "Lazy")) {
1141     network_update_mechanism = UM_LAZY;
1142     net_selective_update = 1;
1143     xbt_assert((select == 1)
1144                ||
1145                (xbt_cfg_is_default_value
1146                 (_surf_cfg_set, "network/maxmin_selective_update")),
1147                "Disabling selective update while using the lazy update mechanism is dumb!");
1148   } else {
1149     xbt_die("Unsupported optimization (%s) for this model", optim);
1150   }
1151 }
1152
1153 /************************************************************************/
1154 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1155 /************************************************************************/
1156 /* @Inproceedings{smpi_ipdps, */
1157 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1158 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1159 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1160 /*  address={Anchorage (Alaska) USA}, */
1161 /*  month=may, */
1162 /*  year={2011} */
1163 /*  } */
1164 void surf_network_model_init_SMPI(void)
1165 {
1166
1167   if (surf_network_model)
1168     return;
1169   set_update_mechanism();
1170
1171   surf_network_model_init_internal();
1172   latency_factor_callback = &smpi_latency_factor;
1173   bandwidth_factor_callback = &smpi_bandwidth_factor;
1174   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1175   gap_append = &smpi_gap_append;
1176   gap_remove = &smpi_gap_remove;
1177   net_define_callbacks();
1178   xbt_dynar_push(model_list, &surf_network_model);
1179   network_solve = lmm_solve;
1180
1181   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1182   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1183 }
1184
1185 /************************************************************************/
1186 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1187 /************************************************************************/
1188 /* @techreport{VELHO:2011:HAL-00646896:1, */
1189 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1190 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1191 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1192 /*      type = {Rapport de recherche}, */
1193 /*      institution = {INRIA}, */
1194 /*      number = {RR-7821}, */
1195 /*      year = {2011}, */
1196 /*      month = Nov, */
1197 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1198 /*  } */
1199 void surf_network_model_init_LegrandVelho(void)
1200 {
1201   if (surf_network_model)
1202     return;
1203
1204   set_update_mechanism();
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",
1212                             13.01);
1213   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1214                             0.97);
1215   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1216 }
1217
1218 /***************************************************************************/
1219 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1220 /***************************************************************************/
1221 /* @TechReport{      rr-lip2002-40, */
1222 /*   author        = {Henri Casanova and Loris Marchal}, */
1223 /*   institution   = {LIP}, */
1224 /*   title         = {A Network Model for Simulation of Grid Application}, */
1225 /*   number        = {2002-40}, */
1226 /*   month         = {oct}, */
1227 /*   year          = {2002} */
1228 /* } */
1229 void surf_network_model_init_CM02(void)
1230 {
1231
1232   if (surf_network_model)
1233     return;
1234
1235   set_update_mechanism();
1236   surf_network_model_init_internal();
1237   net_define_callbacks();
1238   xbt_dynar_push(model_list, &surf_network_model);
1239   network_solve = lmm_solve;
1240
1241   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1242   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1243                             1.0);
1244   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1245 }
1246
1247 /***************************************************************************/
1248 /* The models from Steven H. Low                                           */
1249 /***************************************************************************/
1250 /* @article{Low03,                                                         */
1251 /*   author={Steven H. Low},                                               */
1252 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1253 /*   year={2003},                                                          */
1254 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1255 /*    volume={11}, number={4},                                             */
1256 /*  }                                                                      */
1257 void surf_network_model_init_Reno(void)
1258 {
1259   if (surf_network_model)
1260     return;
1261
1262   set_update_mechanism();
1263   surf_network_model_init_internal();
1264   net_define_callbacks();
1265
1266   xbt_dynar_push(model_list, &surf_network_model);
1267   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1268                                     func_reno_fpi);
1269   network_solve = lagrange_solve;
1270
1271   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1272   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1273                             0.92);
1274   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1275 }
1276
1277
1278 void surf_network_model_init_Reno2(void)
1279 {
1280   if (surf_network_model)
1281     return;
1282
1283   set_update_mechanism();
1284   surf_network_model_init_internal();
1285   net_define_callbacks();
1286
1287   xbt_dynar_push(model_list, &surf_network_model);
1288   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1289                                     func_reno2_fpi);
1290   network_solve = lagrange_solve;
1291
1292   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1293   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1294                             0.92);
1295   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1296                             8775);
1297 }
1298
1299 void surf_network_model_init_Vegas(void)
1300 {
1301   if (surf_network_model)
1302     return;
1303
1304   set_update_mechanism();
1305   surf_network_model_init_internal();
1306   net_define_callbacks();
1307
1308   xbt_dynar_push(model_list, &surf_network_model);
1309   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1310                                     func_vegas_fpi);
1311   network_solve = lagrange_solve;
1312
1313   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1314   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1315                             0.92);
1316   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1317 }