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
 488     min = -1;
 489     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 490     if (value > 0) {
 491       if (GENERIC_ACTION(action).remains > 0) {
 492         value = GENERIC_ACTION(action).remains / value;
 493         min = now + value;
 494       } else {
 495         value = 0.0;
 496         min = now;
 497       }
 498     }
 499
 500     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 501         && (min == -1
 502             || GENERIC_ACTION(action).start +
 503             GENERIC_ACTION(action).max_duration < min)) {
 504       min = GENERIC_ACTION(action).start +
 505           GENERIC_ACTION(action).max_duration;
 506       max_dur_flag = 1;
 507     }
 508
 509     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 510               GENERIC_ACTION(action).start, now + value,
 511               GENERIC_ACTION(action).max_duration);
 512
 513     if (action->index_heap >= 0) {
 514       heap_remove((surf_action_network_CM02_t) action);
 515     }
 516
 517     if (min != -1) {
 518       heap_insert((surf_action_network_CM02_t) action, min,
 519                   max_dur_flag ? MAX_DURATION : NORMAL);
 520       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 521                 now);
 522     }
 523   }
 524
 525   //hereafter must have already the min value for this resource model
 526   if (xbt_heap_size(net_action_heap) > 0) {
 527     min = xbt_heap_maxkey(net_action_heap) - now;
 528   } else {
 529     min = -1;
 530   }
 531
 532   XBT_DEBUG("The minimum with the HEAP %lf", min);
 533
 534   return min;
 535 }
 536
 537 static void net_update_actions_state_full(double now, double delta)
 538 {
 539   double deltap = 0.0;
 540   surf_action_network_CM02_t action = NULL;
 541   surf_action_network_CM02_t next_action = NULL;
 542   xbt_swag_t running_actions =
 543       surf_network_model->states.running_action_set;
 544   /*
 545      xbt_swag_t failed_actions =
 546      surf_network_model->states.failed_action_set;
 547    */
 548
 549   xbt_swag_foreach_safe(action, next_action, running_actions) {
 550     deltap = delta;
 551     if (action->latency > 0) {
 552       if (action->latency > deltap) {
 553         double_update(&(action->latency), deltap);
 554         deltap = 0.0;
 555       } else {
 556         double_update(&(deltap), action->latency);
 557         action->latency = 0.0;
 558       }
 559       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 560         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 561                                    action->weight);
 562     }
 563 #ifdef HAVE_TRACING
 564     if (TRACE_is_enabled()) {
 565       xbt_dynar_t route = NULL;
 566       routing_get_route_and_latency(action->src_name, action->dst_name,
 567                                     &route, NULL);
 568       link_CM02_t link;
 569       unsigned int i;
 570       xbt_dynar_foreach(route, i, link) {
 571         TRACE_surf_link_set_utilization(link->lmm_resource.
 572                                         generic_resource.name,
 573                                         (((surf_action_t)action)->data,
 574                                         (surf_action_t) action,
 575                                         lmm_variable_getvalue(action->
 576                                                               variable),
 577                                         now - delta, delta);
 578       }
 579     }
 580 #endif
 581     if (!lmm_get_number_of_cnst_from_var
 582         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 583       /* There is actually no link used, hence an infinite bandwidth.
 584        * This happens often when using models like vivaldi.
 585        * In such case, just make sure that the action completes immediately.
 586        */
 587       double_update(&(GENERIC_ACTION(action).remains),
 588                     GENERIC_ACTION(action).remains);
 589     }
 590     double_update(&(GENERIC_ACTION(action).remains),
 591                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 592     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 593       double_update(&(((surf_action_t)action)->max_duration), delta);
 594
 595     if ((GENERIC_ACTION(action).remains <= 0) &&
 596         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 597       ((surf_action_t)action)->finish = surf_get_clock();
 598       surf_network_model->action_state_set((surf_action_t) action,
 599                                            SURF_ACTION_DONE);
 600
 601       if (gap_remove)
 602         gap_remove(action);
 603     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 604                && (((surf_action_t)action)->max_duration <= 0)) {
 605       ((surf_action_t)action)->finish = surf_get_clock();
 606       surf_network_model->action_state_set((surf_action_t) action,
 607                                            SURF_ACTION_DONE);
 608       if (gap_remove)
 609         gap_remove(action);
 610     }
 611   }
 612
 613   return;
 614 }
 615
 616 static void net_update_actions_state_lazy(double now, double delta)
 617 {
 618   surf_action_network_CM02_t action = NULL;
 619
 620   while ((xbt_heap_size(net_action_heap) > 0)
 621          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 622     action = xbt_heap_pop(net_action_heap);
 623     XBT_DEBUG("Action %p: finish", action);
 624     GENERIC_ACTION(action).finish = surf_get_clock();
 625
 626     // if I am wearing a latency hat
 627     if (action->hat == LATENCY) {
 628       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 629                                  action->weight);
 630       heap_remove(action);
 631       action->last_update = surf_get_clock();
 632
 633       // if I am wearing a max_duration or normal hat
 634     } else if (action->hat == MAX_DURATION || action->hat == NORMAL) {
 635       // no need to communicate anymore
 636       // assume that flows that reached max_duration have remaining of 0
 637       GENERIC_ACTION(action).remains = 0;
 638       ((surf_action_t)action)->finish = surf_get_clock();
 639       surf_network_model->action_state_set((surf_action_t) action,
 640                                            SURF_ACTION_DONE);
 641       heap_remove(action);
 642     }
 643   }
 644   return;
 645 }
 646
 647 static void net_update_resource_state(void *id,
 648                                       tmgr_trace_event_t event_type,
 649                                       double value, double date)
 650 {
 651   link_CM02_t nw_link = id;
 652   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 653   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 654   /*     value, event_type); */
 655
 656   if (event_type == nw_link->lmm_resource.power.event) {
 657     double delta =
 658         sg_weight_S_parameter / value - sg_weight_S_parameter /
 659         (nw_link->lmm_resource.power.peak *
 660          nw_link->lmm_resource.power.scale);
 661     lmm_variable_t var = NULL;
 662     lmm_element_t elem = NULL;
 663     surf_action_network_CM02_t action = NULL;
 664
 665     nw_link->lmm_resource.power.peak = value;
 666     lmm_update_constraint_bound(network_maxmin_system,
 667                                 nw_link->lmm_resource.constraint,
 668                                 sg_bandwidth_factor *
 669                                 (nw_link->lmm_resource.power.peak *
 670                                  nw_link->lmm_resource.power.scale));
 671 #ifdef HAVE_TRACING
 672     TRACE_surf_link_set_bandwidth(date,
 673                                   (char
 674                                    *) (((nw_link->lmm_resource).
 675                                         generic_resource).name),
 676                                   sg_bandwidth_factor *
 677                                   (nw_link->lmm_resource.power.peak *
 678                                    nw_link->lmm_resource.power.scale));
 679 #endif
 680     if (sg_weight_S_parameter > 0) {
 681       while ((var = lmm_get_var_from_cnst
 682               (network_maxmin_system, nw_link->lmm_resource.constraint,
 683                &elem))) {
 684         action = lmm_variable_id(var);
 685         action->weight += delta;
 686         if (!(GENERIC_LMM_ACTION(action).suspended))
 687           lmm_update_variable_weight(network_maxmin_system,
 688                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 689       }
 690     }
 691     if (tmgr_trace_event_free(event_type))
 692       nw_link->lmm_resource.power.event = NULL;
 693   } else if (event_type == nw_link->lat_event) {
 694     double delta = value - nw_link->lat_current;
 695     lmm_variable_t var = NULL;
 696     lmm_element_t elem = NULL;
 697     surf_action_network_CM02_t action = NULL;
 698
 699     nw_link->lat_current = value;
 700     while ((var = lmm_get_var_from_cnst
 701             (network_maxmin_system, nw_link->lmm_resource.constraint,
 702              &elem))) {
 703       action = lmm_variable_id(var);
 704       action->lat_current += delta;
 705       action->weight += delta;
 706       if (action->rate < 0)
 707         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 708                                   sg_tcp_gamma / (2.0 *
 709                                                   action->lat_current));
 710       else {
 711         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 712                                   min(action->rate,
 713                                       sg_tcp_gamma / (2.0 *
 714                                                       action->
 715                                                       lat_current)));
 716
 717         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 718           XBT_INFO("Flow is limited BYBANDWIDTH");
 719         } else {
 720           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 721                    action->lat_current);
 722         }
 723       }
 724       if (!(GENERIC_LMM_ACTION(action).suspended))
 725         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 726                                    action->weight);
 727
 728     }
 729     if (tmgr_trace_event_free(event_type))
 730       nw_link->lat_event = NULL;
 731   } else if (event_type == nw_link->lmm_resource.state_event) {
 732     if (value > 0)
 733       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 734     else {
 735       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 736       lmm_variable_t var = NULL;
 737       lmm_element_t elem = NULL;
 738
 739       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 740       while ((var = lmm_get_var_from_cnst
 741               (network_maxmin_system, cnst, &elem))) {
 742         surf_action_t action = lmm_variable_id(var);
 743
 744         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 745             surf_action_state_get(action) == SURF_ACTION_READY) {
 746           action->finish = date;
 747           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 748         }
 749       }
 750     }
 751     if (tmgr_trace_event_free(event_type))
 752       nw_link->lmm_resource.state_event = NULL;
 753   } else {
 754     XBT_CRITICAL("Unknown event ! \n");
 755     xbt_abort();
 756   }
 757
 758   XBT_DEBUG
 759       ("There were a resource state event, need to update actions related to the constraint (%p)",
 760        nw_link->lmm_resource.constraint);
 761   return;
 762 }
 763
 764
 765 static surf_action_t net_communicate(const char *src_name,
 766                                      const char *dst_name, double size,
 767                                      double rate)
 768 {
 769   unsigned int i;
 770   link_CM02_t link;
 771   int failed = 0;
 772   surf_action_network_CM02_t action = NULL;
 773   double bandwidth_bound;
 774   double latency = 0.0;
 775   xbt_dynar_t back_route = NULL;
 776   int constraints_per_variable = 0;
 777
 778   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 779
 780   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 781
 782   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 783   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 784              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 785              src_name, dst_name);
 786
 787   xbt_dynar_foreach(route, i, link) {
 788     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 789       failed = 1;
 790       break;
 791     }
 792   }
 793   if (sg_network_crosstraffic == 1) {
 794     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 795     xbt_dynar_foreach(back_route, i, link) {
 796       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 797         failed = 1;
 798         break;
 799       }
 800     }
 801   }
 802
 803   action =
 804       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 805                       surf_network_model, failed);
 806 #ifdef HAVE_LATENCY_BOUND_TRACKING
 807   (GENERIC_LMM_ACTION(action)).latency_limited = 0;
 808 #endif
 809   action->weight = action->latency = latency;
 810
 811   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 812   action->rate = rate;
 813   if (network_update_mechanism == UM_LAZY) {
 814     action->index_heap = -1;
 815     action->last_update = surf_get_clock();
 816   }
 817
 818   bandwidth_bound = -1.0;
 819   if (sg_weight_S_parameter > 0) {
 820     xbt_dynar_foreach(route, i, link) {
 821       action->weight +=
 822           sg_weight_S_parameter /
 823           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 824     }
 825   }
 826   xbt_dynar_foreach(route, i, link) {
 827     double bb = bandwidth_factor_callback(size) *
 828         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 829     bandwidth_bound =
 830         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 831   }
 832
 833   action->lat_current = action->latency;
 834   action->latency *= latency_factor_callback(size);
 835   action->rate =
 836       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 837   if (gap_append) {
 838     xbt_assert(!xbt_dynar_is_empty(route),
 839                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 840
 841     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 842     gap_append(size, link, action);
 843     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 844               action, src_name, dst_name, action->sender.gap,
 845               action->latency);
 846   }
 847
 848   constraints_per_variable = xbt_dynar_length(route);
 849   if (back_route != NULL)
 850     constraints_per_variable += xbt_dynar_length(back_route);
 851
 852   if (action->latency > 0) {
 853     GENERIC_LMM_ACTION(action).variable =
 854         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 855                          constraints_per_variable);
 856     if (network_update_mechanism == UM_LAZY) {
 857       // add to the heap the event when the latency is payed
 858       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 859                 action->latency + action->last_update);
 860       heap_insert(action, action->latency + action->last_update,
 861                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 862     }
 863   } else
 864     GENERIC_LMM_ACTION(action).variable =
 865         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 866                          constraints_per_variable);
 867
 868   if (action->rate < 0) {
 869     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 870                               (action->lat_current > 0) ?
 871                               sg_tcp_gamma / (2.0 *
 872                                               action->lat_current) : -1.0);
 873   } else {
 874     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 875                               (action->lat_current > 0) ?
 876                               min(action->rate,
 877                                   sg_tcp_gamma / (2.0 *
 878                                                   action->lat_current))
 879                               : action->rate);
 880   }
 881
 882   xbt_dynar_foreach(route, i, link) {
 883     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 884                GENERIC_LMM_ACTION(action).variable, 1.0);
 885   }
 886
 887   if (sg_network_crosstraffic == 1) {
 888     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 889     xbt_dynar_foreach(back_route, i, link) {
 890       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 891                  GENERIC_LMM_ACTION(action).variable, .05);
 892     }
 893   }
 894 #ifdef HAVE_TRACING
 895   if (TRACE_is_enabled()) {
 896     action->src_name = xbt_strdup(src_name);
 897     action->dst_name = xbt_strdup(dst_name);
 898   } else {
 899     action->src_name = action->dst_name = NULL;
 900   }
 901 #endif
 902
 903   xbt_dynar_free(&route);
 904   XBT_OUT();
 905
 906   return (surf_action_t) action;
 907 }
 908
 909 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 910 {
 911   xbt_dynar_t route = NULL;
 912   routing_get_route_and_latency(src, dst, &route, NULL);
 913   return route;
 914 }
 915
 916 static double net_get_link_bandwidth(const void *link)
 917 {
 918   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 919   return lmm->power.peak * lmm->power.scale;
 920 }
 921
 922 static double net_get_link_latency(const void *link)
 923 {
 924   return ((link_CM02_t) link)->lat_current;
 925 }
 926
 927 static int net_link_shared(const void *link)
 928 {
 929   return
 930       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 931 }
 932
 933 static void net_action_suspend(surf_action_t action)
 934 {
 935   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 936   lmm_update_variable_weight(network_maxmin_system,
 937                              ((surf_action_network_CM02_t)
 938                               action)->generic_lmm_action.variable, 0.0);
 939
 940   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 941     heap_remove((surf_action_network_CM02_t) action);
 942 }
 943
 944 static void net_action_resume(surf_action_t action)
 945 {
 946   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 947     lmm_update_variable_weight(network_maxmin_system,
 948                                ((surf_action_network_CM02_t)
 949                                 action)->generic_lmm_action.variable,
 950                                ((surf_action_network_CM02_t)
 951                                 action)->weight);
 952     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 953     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 954       heap_remove((surf_action_network_CM02_t) action);
 955   }
 956 }
 957
 958 static int net_action_is_suspended(surf_action_t action)
 959 {
 960   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 961 }
 962
 963 void net_action_set_max_duration(surf_action_t action, double duration)
 964 {
 965   action->max_duration = duration;
 966   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 967     heap_remove((surf_action_network_CM02_t) action);
 968 }
 969
 970 #ifdef HAVE_TRACING
 971 static void net_action_set_category(surf_action_t action,
 972                                     const char *category)
 973 {
 974   action->category = xbt_strdup(category);
 975 }
 976 #endif
 977
 978 static void net_finalize(void)
 979 {
 980   surf_model_exit(surf_network_model);
 981   surf_network_model = NULL;
 982
 983   lmm_system_free(network_maxmin_system);
 984   network_maxmin_system = NULL;
 985
 986   if (network_update_mechanism == UM_LAZY) {
 987     xbt_heap_free(net_action_heap);
 988     xbt_swag_free(net_modified_set);
 989   }
 990
 991   if (smpi_bw_factor)
 992     xbt_dynar_free(&smpi_bw_factor);
 993   if (smpi_lat_factor)
 994     xbt_dynar_free(&smpi_lat_factor);
 995 }
 996
 997 static void smpi_gap_append(double size, const link_CM02_t link,
 998                             surf_action_network_CM02_t action)
 999 {
1000   const char *src = link->lmm_resource.generic_resource.name;
1001   xbt_fifo_t fifo;
1002   surf_action_network_CM02_t last_action;
1003   double bw;
1004
1005   if (sg_sender_gap > 0.0) {
1006     if (!gap_lookup) {
1007       gap_lookup = xbt_dict_new();
1008     }
1009     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1010     action->sender.gap = 0.0;
1011     if (fifo && xbt_fifo_size(fifo) > 0) {
1012       /* Compute gap from last send */
1013       last_action =
1014           (surf_action_network_CM02_t)
1015           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1016       bw = net_get_link_bandwidth(link);
1017       action->sender.gap =
1018           last_action->sender.gap + max(sg_sender_gap,
1019                                         last_action->sender.size / bw);
1020       action->latency += action->sender.gap;
1021     }
1022     /* Append action as last send */
1023     action->sender.link_name = link->lmm_resource.generic_resource.name;
1024     fifo =
1025         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1026                                           action->sender.link_name);
1027     if (!fifo) {
1028       fifo = xbt_fifo_new();
1029       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1030     }
1031     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1032     action->sender.size = size;
1033   }
1034 }
1035
1036 static void smpi_gap_remove(surf_action_network_CM02_t action)
1037 {
1038   xbt_fifo_t fifo;
1039   size_t size;
1040
1041   if (sg_sender_gap > 0.0 && action->sender.link_name
1042       && action->sender.fifo_item) {
1043     fifo =
1044         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1045                                           action->sender.link_name);
1046     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1047     size = xbt_fifo_size(fifo);
1048     if (size == 0) {
1049       xbt_fifo_free(fifo);
1050       xbt_dict_remove(gap_lookup, action->sender.link_name);
1051       size = xbt_dict_length(gap_lookup);
1052       if (size == 0) {
1053         xbt_dict_free(&gap_lookup);
1054       }
1055     }
1056   }
1057 }
1058
1059 static void surf_network_model_init_internal(void)
1060 {
1061   s_surf_action_network_CM02_t comm;
1062   surf_network_model = surf_model_init();
1063
1064   surf_network_model->name = "network";
1065   surf_network_model->action_unref = net_action_unref;
1066   surf_network_model->action_cancel = net_action_cancel;
1067   surf_network_model->action_recycle = net_action_recycle;
1068   surf_network_model->get_remains = net_action_get_remains;
1069 #ifdef HAVE_LATENCY_BOUND_TRACKING
1070   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1071 #endif
1072 #ifdef HAVE_TRACING
1073   surf_network_model->set_category = net_action_set_category;
1074 #endif
1075
1076   surf_network_model->model_private->resource_used = net_resource_used;
1077   if (network_update_mechanism == UM_LAZY) {
1078     surf_network_model->model_private->share_resources =
1079         net_share_resources_lazy;
1080     surf_network_model->model_private->update_actions_state =
1081         net_update_actions_state_lazy;
1082   } else if (network_update_mechanism == UM_FULL) {
1083     surf_network_model->model_private->share_resources =
1084         net_share_resources_full;
1085     surf_network_model->model_private->update_actions_state =
1086         net_update_actions_state_full;
1087   }
1088
1089   surf_network_model->model_private->update_resource_state =
1090       net_update_resource_state;
1091   surf_network_model->model_private->finalize = net_finalize;
1092
1093   surf_network_model->suspend = net_action_suspend;
1094   surf_network_model->resume = net_action_resume;
1095   surf_network_model->is_suspended = net_action_is_suspended;
1096   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1097
1098   surf_network_model->extension.network.communicate = net_communicate;
1099   surf_network_model->extension.network.get_route = net_get_route;
1100   surf_network_model->extension.network.get_link_bandwidth =
1101       net_get_link_bandwidth;
1102   surf_network_model->extension.network.get_link_latency =
1103       net_get_link_latency;
1104   surf_network_model->extension.network.link_shared = net_link_shared;
1105   surf_network_model->extension.network.add_traces = net_add_traces;
1106   surf_network_model->extension.network.create_resource =
1107       net_create_resource;
1108
1109   if (!network_maxmin_system)
1110     network_maxmin_system = lmm_system_new(net_selective_update);
1111
1112   routing_model_create(sizeof(link_CM02_t),
1113                        net_create_resource("__loopback__",
1114                                            498000000, NULL, 0.000015, NULL,
1115                                            SURF_RESOURCE_ON, NULL,
1116                                            SURF_LINK_FATPIPE, NULL));
1117
1118   if (network_update_mechanism == UM_LAZY) {
1119     net_action_heap = xbt_heap_new(8, NULL);
1120     xbt_heap_set_update_callback(net_action_heap,
1121                                  net_action_update_index_heap);
1122     net_modified_set =
1123         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1124     network_maxmin_system->keep_track = net_modified_set;
1125   }
1126 }
1127
1128 static void set_update_mechanism(void)
1129 {
1130 #ifdef HAVE_TRACING
1131   TRACE_set_network_update_mechanism();
1132 #endif
1133
1134   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1135   int select =
1136       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1137
1138   if (!strcmp(optim, "Full")) {
1139     network_update_mechanism = UM_FULL;
1140     net_selective_update = select;
1141   } else if (!strcmp(optim, "Lazy")) {
1142     network_update_mechanism = UM_LAZY;
1143     net_selective_update = 1;
1144     xbt_assert((select == 1)
1145                ||
1146                (xbt_cfg_is_default_value
1147                 (_surf_cfg_set, "network/maxmin_selective_update")),
1148                "Disabling selective update while using the lazy update mechanism is dumb!");
1149   } else {
1150     xbt_die("Unsupported optimization (%s) for this model", optim);
1151   }
1152 }
1153
1154 /************************************************************************/
1155 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1156 /************************************************************************/
1157 /* @Inproceedings{smpi_ipdps, */
1158 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1159 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1160 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1161 /*  address={Anchorage (Alaska) USA}, */
1162 /*  month=may, */
1163 /*  year={2011} */
1164 /*  } */
1165 void surf_network_model_init_SMPI(void)
1166 {
1167
1168   if (surf_network_model)
1169     return;
1170   set_update_mechanism();
1171
1172   surf_network_model_init_internal();
1173   latency_factor_callback = &smpi_latency_factor;
1174   bandwidth_factor_callback = &smpi_bandwidth_factor;
1175   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1176   gap_append = &smpi_gap_append;
1177   gap_remove = &smpi_gap_remove;
1178   net_define_callbacks();
1179   xbt_dynar_push(model_list, &surf_network_model);
1180   network_solve = lmm_solve;
1181
1182   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1183   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1184 }
1185
1186 /************************************************************************/
1187 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1188 /************************************************************************/
1189 /* @techreport{VELHO:2011:HAL-00646896:1, */
1190 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1191 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1192 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1193 /*      type = {Rapport de recherche}, */
1194 /*      institution = {INRIA}, */
1195 /*      number = {RR-7821}, */
1196 /*      year = {2011}, */
1197 /*      month = Nov, */
1198 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1199 /*  } */
1200 void surf_network_model_init_LegrandVelho(void)
1201 {
1202   if (surf_network_model)
1203     return;
1204
1205   set_update_mechanism();
1206
1207   surf_network_model_init_internal();
1208   net_define_callbacks();
1209   xbt_dynar_push(model_list, &surf_network_model);
1210   network_solve = lmm_solve;
1211
1212   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1213                             13.01);
1214   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1215                             0.97);
1216   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1217 }
1218
1219 /***************************************************************************/
1220 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1221 /***************************************************************************/
1222 /* @TechReport{      rr-lip2002-40, */
1223 /*   author        = {Henri Casanova and Loris Marchal}, */
1224 /*   institution   = {LIP}, */
1225 /*   title         = {A Network Model for Simulation of Grid Application}, */
1226 /*   number        = {2002-40}, */
1227 /*   month         = {oct}, */
1228 /*   year          = {2002} */
1229 /* } */
1230 void surf_network_model_init_CM02(void)
1231 {
1232
1233   if (surf_network_model)
1234     return;
1235
1236   set_update_mechanism();
1237   surf_network_model_init_internal();
1238   net_define_callbacks();
1239   xbt_dynar_push(model_list, &surf_network_model);
1240   network_solve = lmm_solve;
1241
1242   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1243   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1244                             1.0);
1245   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1246 }
1247
1248 /***************************************************************************/
1249 /* The models from Steven H. Low                                           */
1250 /***************************************************************************/
1251 /* @article{Low03,                                                         */
1252 /*   author={Steven H. Low},                                               */
1253 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1254 /*   year={2003},                                                          */
1255 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1256 /*    volume={11}, number={4},                                             */
1257 /*  }                                                                      */
1258 void surf_network_model_init_Reno(void)
1259 {
1260   if (surf_network_model)
1261     return;
1262
1263   set_update_mechanism();
1264   surf_network_model_init_internal();
1265   net_define_callbacks();
1266
1267   xbt_dynar_push(model_list, &surf_network_model);
1268   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1269                                     func_reno_fpi);
1270   network_solve = lagrange_solve;
1271
1272   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1273   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1274                             0.92);
1275   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1276 }
1277
1278
1279 void surf_network_model_init_Reno2(void)
1280 {
1281   if (surf_network_model)
1282     return;
1283
1284   set_update_mechanism();
1285   surf_network_model_init_internal();
1286   net_define_callbacks();
1287
1288   xbt_dynar_push(model_list, &surf_network_model);
1289   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1290                                     func_reno2_fpi);
1291   network_solve = lagrange_solve;
1292
1293   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1294   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1295                             0.92);
1296   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1297                             8775);
1298 }
1299
1300 void surf_network_model_init_Vegas(void)
1301 {
1302   if (surf_network_model)
1303     return;
1304
1305   set_update_mechanism();
1306   surf_network_model_init_internal();
1307   net_define_callbacks();
1308
1309   xbt_dynar_push(model_list, &surf_network_model);
1310   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1311                                     func_vegas_fpi);
1312   network_solve = lagrange_solve;
1313
1314   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1315   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1316                             0.92);
1317   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1318 }