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 a = action;
  71   GENERIC_LMM_ACTION(a).index_heap = i;
  72 }
  73
  74 /* insert action on heap using a given key and a hat (heap_action_type)
  75  * a hat can be of three types for communications:
  76  *
  77  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  78  * LATENCY = this is a heap entry to warn us when the latency is payed
  79  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  80  */
  81 static void heap_insert(surf_action_network_CM02_t action, double key,
  82                         enum heap_action_type hat)
  83 {
  84   GENERIC_LMM_ACTION(action).hat = hat;
  85   xbt_heap_push(net_action_heap, action, key);
  86 }
  87
  88 static void heap_remove(surf_action_network_CM02_t action)
  89 {
  90   GENERIC_LMM_ACTION(action).hat = NOTSET;
  91   if (GENERIC_LMM_ACTION(action).index_heap >= 0) {
  92     xbt_heap_remove(net_action_heap, GENERIC_LMM_ACTION(action).index_heap);
  93   }
  94 }
  95
  96 /******************************************************************************/
  97 /*                           Factors callbacks                                */
  98 /******************************************************************************/
  99 static double constant_latency_factor(double size)
 100 {
 101   return sg_latency_factor;
 102 }
 103
 104 static double constant_bandwidth_factor(double size)
 105 {
 106   return sg_bandwidth_factor;
 107 }
 108
 109 static double constant_bandwidth_constraint(double rate, double bound,
 110                                             double size)
 111 {
 112   return rate;
 113 }
 114
 115 /**********************/
 116 /*   SMPI callbacks   */
 117 /**********************/
 118 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 119 {
 120   char *value = NULL;
 121   unsigned int iter = 0;
 122   s_smpi_factor_t fact;
 123   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 124
 125   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 126   radical_elements = xbt_str_split(smpi_coef_string, ";");
 127   xbt_dynar_foreach(radical_elements, iter, value) {
 128
 129     radical_elements2 = xbt_str_split(value, ":");
 130     if (xbt_dynar_length(radical_elements2) != 2)
 131       xbt_die("Malformed radical for smpi factor!");
 132     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 133     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 134     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 135     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 136     xbt_dynar_free(&radical_elements2);
 137   }
 138   xbt_dynar_free(&radical_elements);
 139   return smpi_factor;
 140 }
 141
 142 static double smpi_bandwidth_factor(double size)
 143 {
 144   if (!smpi_bw_factor)
 145     smpi_bw_factor =
 146         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 147
 148   unsigned int iter = 0;
 149   s_smpi_factor_t fact;
 150   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 151     if (size >= fact.factor) {
 152       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 153       return fact.value;
 154     }
 155   }
 156
 157   return 1.0;
 158 }
 159
 160 static double smpi_latency_factor(double size)
 161 {
 162   if (!smpi_lat_factor)
 163     smpi_lat_factor =
 164         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 165
 166   unsigned int iter = 0;
 167   s_smpi_factor_t fact;
 168   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 169     if (size >= fact.factor) {
 170       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 171       return fact.value;
 172     }
 173   }
 174
 175   return 1.0;
 176 }
 177
 178 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 179
 180 static double smpi_bandwidth_constraint(double rate, double bound,
 181                                         double size)
 182 {
 183   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 184 }
 185
 186 static double (*latency_factor_callback) (double) =
 187     &constant_latency_factor;
 188 static double (*bandwidth_factor_callback) (double) =
 189     &constant_bandwidth_factor;
 190 static double (*bandwidth_constraint_callback) (double, double, double) =
 191     &constant_bandwidth_constraint;
 192
 193 static void (*gap_append) (double, const link_CM02_t,
 194                            surf_action_network_CM02_t) = NULL;
 195 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 196
 197 static void *net_create_resource(const char *name,
 198                                  double bw_initial,
 199                                  tmgr_trace_t bw_trace,
 200                                  double lat_initial,
 201                                  tmgr_trace_t lat_trace,
 202                                  e_surf_resource_state_t
 203                                  state_initial,
 204                                  tmgr_trace_t state_trace,
 205                                  e_surf_link_sharing_policy_t
 206                                  policy, xbt_dict_t properties)
 207 {
 208   link_CM02_t nw_link = (link_CM02_t)
 209       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 210                             surf_network_model, name, properties,
 211                             network_maxmin_system,
 212                             sg_bandwidth_factor * bw_initial,
 213                             history,
 214                             state_initial, state_trace,
 215                             bw_initial, bw_trace);
 216
 217   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 218              "Link '%s' declared several times in the platform file.",
 219              name);
 220
 221   nw_link->lat_current = lat_initial;
 222   if (lat_trace)
 223     nw_link->lat_event =
 224         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 225
 226   if (policy == SURF_LINK_FATPIPE)
 227     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 228
 229   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 230
 231   return nw_link;
 232 }
 233
 234 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 235 {
 236   if (link->policy == SURF_LINK_FULLDUPLEX) {
 237     char *link_id;
 238     link_id = bprintf("%s_UP", link->id);
 239     net_create_resource(link_id,
 240                         link->bandwidth,
 241                         link->bandwidth_trace,
 242                         link->latency,
 243                         link->latency_trace,
 244                         link->state,
 245                         link->state_trace, link->policy, link->properties);
 246     xbt_free(link_id);
 247     link_id = bprintf("%s_DOWN", link->id);
 248     net_create_resource(link_id,
 249                         link->bandwidth,
 250                         link->bandwidth_trace,
 251                         link->latency,
 252                         link->latency_trace,
 253                         link->state,
 254                         link->state_trace, link->policy, link->properties);
 255     xbt_free(link_id);
 256   } else {
 257     net_create_resource(link->id,
 258                         link->bandwidth,
 259                         link->bandwidth_trace,
 260                         link->latency,
 261                         link->latency_trace,
 262                         link->state,
 263                         link->state_trace, link->policy, link->properties);
 264   }
 265 }
 266
 267 static void net_add_traces(void)
 268 {
 269   xbt_dict_cursor_t cursor = NULL;
 270   char *trace_name, *elm;
 271
 272   static int called = 0;
 273   if (called)
 274     return;
 275   called = 1;
 276
 277   /* connect all traces relative to network */
 278   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 279     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 280     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 281
 282     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 283                trace_name, elm);
 284     xbt_assert(trace,
 285                "Cannot connect trace %s to link %s: trace undefined",
 286                trace_name, elm);
 287
 288     link->lmm_resource.state_event =
 289         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 290   }
 291
 292   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 293     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 294     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 295
 296     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 297                trace_name, elm);
 298     xbt_assert(trace,
 299                "Cannot connect trace %s to link %s: trace undefined",
 300                trace_name, elm);
 301
 302     link->lmm_resource.power.event =
 303         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 304   }
 305
 306   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 307     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 308     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 309
 310     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 311                trace_name, elm);
 312     xbt_assert(trace,
 313                "Cannot connect trace %s to link %s: trace undefined",
 314                trace_name, elm);
 315
 316     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 317   }
 318 }
 319
 320 static void net_define_callbacks(void)
 321 {
 322   /* Figuring out the network links */
 323   sg_platf_link_add_cb(net_parse_link_init);
 324   sg_platf_postparse_add_cb(net_add_traces);
 325 }
 326
 327 static int net_resource_used(void *resource_id)
 328 {
 329   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 330                                                      resource_id)->
 331                              constraint);
 332 }
 333
 334 static int net_action_unref(surf_action_t action)
 335 {
 336   action->refcount--;
 337   if (!action->refcount) {
 338     xbt_swag_remove(action, action->state_set);
 339     if (((surf_action_lmm_t)action)->variable) {
 340       lmm_variable_free(network_maxmin_system,
 341                         ((surf_action_lmm_t) action)->variable);
 342     }
 343     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 344       heap_remove((surf_action_network_CM02_t) action);
 345       xbt_swag_remove(action, net_modified_set);
 346     }
 347 #ifdef HAVE_TRACING
 348     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 349     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 350     xbt_free(action->category);
 351 #endif
 352     surf_action_free(&action);
 353     return 1;
 354   }
 355   return 0;
 356 }
 357
 358
 359
 360 static void net_action_cancel(surf_action_t action)
 361 {
 362   XBT_DEBUG("cancel action %p", action);
 363   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 364   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 365     xbt_swag_remove(action, net_modified_set);
 366     heap_remove((surf_action_network_CM02_t) action);
 367   }
 368 }
 369
 370 void net_action_recycle(surf_action_t action)
 371 {
 372   return;
 373 }
 374
 375 #ifdef HAVE_LATENCY_BOUND_TRACKING
 376 int net_get_link_latency_limited(surf_action_t action)
 377 {
 378   return action->latency_limited;
 379 }
 380 #endif
 381
 382 double net_action_get_remains(surf_action_t action)
 383 {
 384   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 385     update_action_remaining_lazy(surf_get_clock());
 386   return action->remains;
 387 }
 388
 389 static void update_action_remaining_lazy(double now)
 390 {
 391   surf_action_network_CM02_t action = NULL;
 392   double delta = 0.0;
 393
 394   xbt_swag_foreach(action, net_modified_set) {
 395
 396     if (GENERIC_LMM_ACTION(action).suspended != 0) {
 397       continue;
 398     }
 399
 400     delta = now - GENERIC_LMM_ACTION(action).last_update;
 401
 402     double_update(&(((surf_action_t)action)->remains),
 403                   lmm_variable_getvalue(((surf_action_lmm_t) action)->variable) * delta);
 404
 405     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 406       double_update(&(((surf_action_t)action)->max_duration), delta);
 407
 408     if ((((surf_action_t)action)->remains <= 0) &&
 409         (lmm_get_variable_weight(((surf_action_lmm_t)action)->variable) > 0)) {
 410       ((surf_action_t)action)->finish = surf_get_clock();
 411       surf_network_model->action_state_set((surf_action_t) action,
 412                                            SURF_ACTION_DONE);
 413       heap_remove(action);
 414     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 415                && (((surf_action_t)action)->max_duration <= 0))) {
 416       ((surf_action_t)action)->finish = surf_get_clock();
 417       surf_network_model->action_state_set((surf_action_t) action,
 418                                            SURF_ACTION_DONE);
 419       heap_remove(action);
 420     }
 421
 422     GENERIC_LMM_ACTION(action).last_update = now;
 423   }
 424 }
 425
 426 static double net_share_resources_full(double now)
 427 {
 428   s_surf_action_lmm_t s_action;
 429   surf_action_network_CM02_t action = NULL;
 430   xbt_swag_t running_actions =
 431       surf_network_model->states.running_action_set;
 432   double min;
 433
 434   min = generic_maxmin_share_resources(running_actions,
 435                                        xbt_swag_offset(s_action,
 436                                                        variable),
 437                                        network_maxmin_system,
 438                                        network_solve);
 439
 440 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 441
 442   xbt_swag_foreach(action, running_actions) {
 443 #ifdef HAVE_LATENCY_BOUND_TRACKING
 444     if (lmm_is_variable_limited_by_latency(action->variable)) {
 445       GENERIC_LMM_ACTION(action).latency_limited = 1;
 446     } else {
 447       GENERIC_LMM_ACTION(action).latency_limited = 0;
 448     }
 449 #endif
 450     if (action->latency > 0) {
 451       min = (min < 0) ? action->latency : min(min, action->latency);
 452     }
 453   }
 454
 455   XBT_DEBUG("Min of share resources %f", min);
 456
 457   return min;
 458 }
 459
 460 static double net_share_resources_lazy(double now)
 461 {
 462   surf_action_network_CM02_t action = NULL;
 463   double min = -1;
 464   double value;
 465
 466   XBT_DEBUG
 467       ("Before share resources, the size of modified actions set is %d",
 468        xbt_swag_size(net_modified_set));
 469   update_action_remaining_lazy(now);
 470
 471   lmm_solve(network_maxmin_system);
 472
 473   XBT_DEBUG
 474       ("After share resources, The size of modified actions set is %d",
 475        xbt_swag_size(net_modified_set));
 476
 477   xbt_swag_foreach(action, net_modified_set) {
 478     int max_dur_flag = 0;
 479
 480     if (GENERIC_ACTION(action).state_set !=
 481         surf_network_model->states.running_action_set)
 482       continue;
 483
 484     /* bogus priority, skip it */
 485     if (GENERIC_ACTION(action).priority <= 0)
 486       continue;
 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 (min != -1) {
 514       heap_remove(action);
 515       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 516       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 517                 now);
 518     } else DIE_IMPOSSIBLE;
 519   }
 520
 521   //hereafter must have already the min value for this resource model
 522   if (xbt_heap_size(net_action_heap) > 0)
 523     min = xbt_heap_maxkey(net_action_heap) - now;
 524   else
 525     min = -1;
 526
 527   XBT_DEBUG("The minimum with the HEAP %lf", min);
 528
 529   return min;
 530 }
 531
 532 static void net_update_actions_state_full(double now, double delta)
 533 {
 534   double deltap = 0.0;
 535   surf_action_network_CM02_t action = NULL;
 536   surf_action_network_CM02_t next_action = NULL;
 537   xbt_swag_t running_actions =
 538       surf_network_model->states.running_action_set;
 539   /*
 540      xbt_swag_t failed_actions =
 541      surf_network_model->states.failed_action_set;
 542    */
 543
 544   xbt_swag_foreach_safe(action, next_action, running_actions) {
 545     deltap = delta;
 546     if (action->latency > 0) {
 547       if (action->latency > deltap) {
 548         double_update(&(action->latency), deltap);
 549         deltap = 0.0;
 550       } else {
 551         double_update(&(deltap), action->latency);
 552         action->latency = 0.0;
 553       }
 554       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 555         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 556                                    action->weight);
 557     }
 558 #ifdef HAVE_TRACING
 559     if (TRACE_is_enabled()) {
 560       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 561       unsigned int i;
 562       for (i = 0; i < n; i++){
 563         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 564                                                             GENERIC_LMM_ACTION(action).variable,
 565                                                             i);
 566         link_CM02_t link = lmm_constraint_id(constraint);
 567         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 568                                         ((surf_action_t)action)->category,
 569                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 570                                         now - delta,
 571                                         delta);
 572       }
 573     }
 574 #endif
 575     if (!lmm_get_number_of_cnst_from_var
 576         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 577       /* There is actually no link used, hence an infinite bandwidth.
 578        * This happens often when using models like vivaldi.
 579        * In such case, just make sure that the action completes immediately.
 580        */
 581       double_update(&(GENERIC_ACTION(action).remains),
 582                     GENERIC_ACTION(action).remains);
 583     }
 584     double_update(&(GENERIC_ACTION(action).remains),
 585                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 586     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 587       double_update(&(((surf_action_t)action)->max_duration), delta);
 588
 589     if ((GENERIC_ACTION(action).remains <= 0) &&
 590         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 591       ((surf_action_t)action)->finish = surf_get_clock();
 592       surf_network_model->action_state_set((surf_action_t) action,
 593                                            SURF_ACTION_DONE);
 594
 595       if (gap_remove)
 596         gap_remove(action);
 597     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 598                && (((surf_action_t)action)->max_duration <= 0)) {
 599       ((surf_action_t)action)->finish = surf_get_clock();
 600       surf_network_model->action_state_set((surf_action_t) action,
 601                                            SURF_ACTION_DONE);
 602       if (gap_remove)
 603         gap_remove(action);
 604     }
 605   }
 606
 607   return;
 608 }
 609
 610 static void net_update_actions_state_lazy(double now, double delta)
 611 {
 612   surf_action_network_CM02_t action = NULL;
 613
 614   while ((xbt_heap_size(net_action_heap) > 0)
 615          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 616     action = xbt_heap_pop(net_action_heap);
 617     XBT_DEBUG("Action %p: finish", action);
 618     GENERIC_ACTION(action).finish = surf_get_clock();
 619
 620     // if I am wearing a latency hat
 621     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 622       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 623                                  action->weight);
 624       heap_remove(action);
 625       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 626
 627       // if I am wearing a max_duration or normal hat
 628     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 629         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 630       // no need to communicate anymore
 631       // assume that flows that reached max_duration have remaining of 0
 632       GENERIC_ACTION(action).remains = 0;
 633       ((surf_action_t)action)->finish = surf_get_clock();
 634       surf_network_model->action_state_set((surf_action_t) action,
 635                                            SURF_ACTION_DONE);
 636       heap_remove(action);
 637     }
 638   }
 639   return;
 640 }
 641
 642 static void net_update_resource_state(void *id,
 643                                       tmgr_trace_event_t event_type,
 644                                       double value, double date)
 645 {
 646   link_CM02_t nw_link = id;
 647   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 648   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 649   /*     value, event_type); */
 650
 651   if (event_type == nw_link->lmm_resource.power.event) {
 652     double delta =
 653         sg_weight_S_parameter / value - sg_weight_S_parameter /
 654         (nw_link->lmm_resource.power.peak *
 655          nw_link->lmm_resource.power.scale);
 656     lmm_variable_t var = NULL;
 657     lmm_element_t elem = NULL;
 658     surf_action_network_CM02_t action = NULL;
 659
 660     nw_link->lmm_resource.power.peak = value;
 661     lmm_update_constraint_bound(network_maxmin_system,
 662                                 nw_link->lmm_resource.constraint,
 663                                 sg_bandwidth_factor *
 664                                 (nw_link->lmm_resource.power.peak *
 665                                  nw_link->lmm_resource.power.scale));
 666 #ifdef HAVE_TRACING
 667     TRACE_surf_link_set_bandwidth(date,
 668                                   (char
 669                                    *) (((nw_link->lmm_resource).
 670                                         generic_resource).name),
 671                                   sg_bandwidth_factor *
 672                                   (nw_link->lmm_resource.power.peak *
 673                                    nw_link->lmm_resource.power.scale));
 674 #endif
 675     if (sg_weight_S_parameter > 0) {
 676       while ((var = lmm_get_var_from_cnst
 677               (network_maxmin_system, nw_link->lmm_resource.constraint,
 678                &elem))) {
 679         action = lmm_variable_id(var);
 680         action->weight += delta;
 681         if (!(GENERIC_LMM_ACTION(action).suspended))
 682           lmm_update_variable_weight(network_maxmin_system,
 683                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 684       }
 685     }
 686     if (tmgr_trace_event_free(event_type))
 687       nw_link->lmm_resource.power.event = NULL;
 688   } else if (event_type == nw_link->lat_event) {
 689     double delta = value - nw_link->lat_current;
 690     lmm_variable_t var = NULL;
 691     lmm_element_t elem = NULL;
 692     surf_action_network_CM02_t action = NULL;
 693
 694     nw_link->lat_current = value;
 695     while ((var = lmm_get_var_from_cnst
 696             (network_maxmin_system, nw_link->lmm_resource.constraint,
 697              &elem))) {
 698       action = lmm_variable_id(var);
 699       action->lat_current += delta;
 700       action->weight += delta;
 701       if (action->rate < 0)
 702         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 703                                   sg_tcp_gamma / (2.0 *
 704                                                   action->lat_current));
 705       else {
 706         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 707                                   min(action->rate,
 708                                       sg_tcp_gamma / (2.0 *
 709                                                       action->
 710                                                       lat_current)));
 711
 712         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 713           XBT_INFO("Flow is limited BYBANDWIDTH");
 714         } else {
 715           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 716                    action->lat_current);
 717         }
 718       }
 719       if (!(GENERIC_LMM_ACTION(action).suspended))
 720         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 721                                    action->weight);
 722
 723     }
 724     if (tmgr_trace_event_free(event_type))
 725       nw_link->lat_event = NULL;
 726   } else if (event_type == nw_link->lmm_resource.state_event) {
 727     if (value > 0)
 728       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 729     else {
 730       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 731       lmm_variable_t var = NULL;
 732       lmm_element_t elem = NULL;
 733
 734       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 735       while ((var = lmm_get_var_from_cnst
 736               (network_maxmin_system, cnst, &elem))) {
 737         surf_action_t action = lmm_variable_id(var);
 738
 739         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 740             surf_action_state_get(action) == SURF_ACTION_READY) {
 741           action->finish = date;
 742           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 743         }
 744       }
 745     }
 746     if (tmgr_trace_event_free(event_type))
 747       nw_link->lmm_resource.state_event = NULL;
 748   } else {
 749     XBT_CRITICAL("Unknown event ! \n");
 750     xbt_abort();
 751   }
 752
 753   XBT_DEBUG
 754       ("There were a resource state event, need to update actions related to the constraint (%p)",
 755        nw_link->lmm_resource.constraint);
 756   return;
 757 }
 758
 759
 760 static surf_action_t net_communicate(const char *src_name,
 761                                      const char *dst_name, double size,
 762                                      double rate)
 763 {
 764   unsigned int i;
 765   link_CM02_t link;
 766   int failed = 0;
 767   surf_action_network_CM02_t action = NULL;
 768   double bandwidth_bound;
 769   double latency = 0.0;
 770   xbt_dynar_t back_route = NULL;
 771   int constraints_per_variable = 0;
 772
 773   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 774
 775   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 776
 777   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 778   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 779              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 780              src_name, dst_name);
 781
 782   xbt_dynar_foreach(route, i, link) {
 783     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 784       failed = 1;
 785       break;
 786     }
 787   }
 788   if (sg_network_crosstraffic == 1) {
 789     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 790     xbt_dynar_foreach(back_route, i, link) {
 791       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 792         failed = 1;
 793         break;
 794       }
 795     }
 796   }
 797
 798   action =
 799       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 800                       surf_network_model, failed);
 801 #ifdef HAVE_LATENCY_BOUND_TRACKING
 802   (GENERIC_LMM_ACTION(action)).latency_limited = 0;
 803 #endif
 804   action->weight = action->latency = latency;
 805
 806   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 807   action->rate = rate;
 808   if (network_update_mechanism == UM_LAZY) {
 809     GENERIC_LMM_ACTION(action).index_heap = -1;
 810     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 811   }
 812
 813   bandwidth_bound = -1.0;
 814   if (sg_weight_S_parameter > 0) {
 815     xbt_dynar_foreach(route, i, link) {
 816       action->weight +=
 817           sg_weight_S_parameter /
 818           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 819     }
 820   }
 821   xbt_dynar_foreach(route, i, link) {
 822     double bb = bandwidth_factor_callback(size) *
 823         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 824     bandwidth_bound =
 825         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 826   }
 827
 828   action->lat_current = action->latency;
 829   action->latency *= latency_factor_callback(size);
 830   action->rate =
 831       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 832   if (gap_append) {
 833     xbt_assert(!xbt_dynar_is_empty(route),
 834                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 835
 836     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 837     gap_append(size, link, action);
 838     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 839               action, src_name, dst_name, action->sender.gap,
 840               action->latency);
 841   }
 842
 843   constraints_per_variable = xbt_dynar_length(route);
 844   if (back_route != NULL)
 845     constraints_per_variable += xbt_dynar_length(back_route);
 846
 847   if (action->latency > 0) {
 848     GENERIC_LMM_ACTION(action).variable =
 849         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 850                          constraints_per_variable);
 851     if (network_update_mechanism == UM_LAZY) {
 852       // add to the heap the event when the latency is payed
 853       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 854                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 855       heap_insert(action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 856                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 857     }
 858   } else
 859     GENERIC_LMM_ACTION(action).variable =
 860         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 861                          constraints_per_variable);
 862
 863   if (action->rate < 0) {
 864     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 865                               (action->lat_current > 0) ?
 866                               sg_tcp_gamma / (2.0 *
 867                                               action->lat_current) : -1.0);
 868   } else {
 869     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 870                               (action->lat_current > 0) ?
 871                               min(action->rate,
 872                                   sg_tcp_gamma / (2.0 *
 873                                                   action->lat_current))
 874                               : action->rate);
 875   }
 876
 877   xbt_dynar_foreach(route, i, link) {
 878     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 879                GENERIC_LMM_ACTION(action).variable, 1.0);
 880   }
 881
 882   if (sg_network_crosstraffic == 1) {
 883     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 884     xbt_dynar_foreach(back_route, i, link) {
 885       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 886                  GENERIC_LMM_ACTION(action).variable, .05);
 887     }
 888   }
 889 #ifdef HAVE_TRACING
 890   if (TRACE_is_enabled()) {
 891     action->src_name = xbt_strdup(src_name);
 892     action->dst_name = xbt_strdup(dst_name);
 893   } else {
 894     action->src_name = action->dst_name = NULL;
 895   }
 896 #endif
 897
 898   xbt_dynar_free(&route);
 899   XBT_OUT();
 900
 901   return (surf_action_t) action;
 902 }
 903
 904 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 905 {
 906   xbt_dynar_t route = NULL;
 907   routing_get_route_and_latency(src, dst, &route, NULL);
 908   return route;
 909 }
 910
 911 static double net_get_link_bandwidth(const void *link)
 912 {
 913   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 914   return lmm->power.peak * lmm->power.scale;
 915 }
 916
 917 static double net_get_link_latency(const void *link)
 918 {
 919   return ((link_CM02_t) link)->lat_current;
 920 }
 921
 922 static int net_link_shared(const void *link)
 923 {
 924   return
 925       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 926 }
 927
 928 static void net_action_suspend(surf_action_t action)
 929 {
 930   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 931   lmm_update_variable_weight(network_maxmin_system,
 932                              ((surf_action_network_CM02_t)
 933                               action)->generic_lmm_action.variable, 0.0);
 934
 935   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 936     heap_remove((surf_action_network_CM02_t) action);
 937 }
 938
 939 static void net_action_resume(surf_action_t action)
 940 {
 941   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 942     lmm_update_variable_weight(network_maxmin_system,
 943                                ((surf_action_network_CM02_t)
 944                                 action)->generic_lmm_action.variable,
 945                                ((surf_action_network_CM02_t)
 946                                 action)->weight);
 947     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 948     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 949       heap_remove((surf_action_network_CM02_t) action);
 950   }
 951 }
 952
 953 static int net_action_is_suspended(surf_action_t action)
 954 {
 955   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 956 }
 957
 958 void net_action_set_max_duration(surf_action_t action, double duration)
 959 {
 960   action->max_duration = duration;
 961   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 962     heap_remove((surf_action_network_CM02_t) action);
 963 }
 964
 965 #ifdef HAVE_TRACING
 966 static void net_action_set_category(surf_action_t action,
 967                                     const char *category)
 968 {
 969   action->category = xbt_strdup(category);
 970 }
 971 #endif
 972
 973 static void net_finalize(void)
 974 {
 975   surf_model_exit(surf_network_model);
 976   surf_network_model = NULL;
 977
 978   lmm_system_free(network_maxmin_system);
 979   network_maxmin_system = NULL;
 980
 981   if (network_update_mechanism == UM_LAZY) {
 982     xbt_heap_free(net_action_heap);
 983     xbt_swag_free(net_modified_set);
 984   }
 985
 986   if (smpi_bw_factor)
 987     xbt_dynar_free(&smpi_bw_factor);
 988   if (smpi_lat_factor)
 989     xbt_dynar_free(&smpi_lat_factor);
 990 }
 991
 992 static void smpi_gap_append(double size, const link_CM02_t link,
 993                             surf_action_network_CM02_t action)
 994 {
 995   const char *src = link->lmm_resource.generic_resource.name;
 996   xbt_fifo_t fifo;
 997   surf_action_network_CM02_t last_action;
 998   double bw;
 999
1000   if (sg_sender_gap > 0.0) {
1001     if (!gap_lookup) {
1002       gap_lookup = xbt_dict_new();
1003     }
1004     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1005     action->sender.gap = 0.0;
1006     if (fifo && xbt_fifo_size(fifo) > 0) {
1007       /* Compute gap from last send */
1008       last_action =
1009           (surf_action_network_CM02_t)
1010           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1011       bw = net_get_link_bandwidth(link);
1012       action->sender.gap =
1013           last_action->sender.gap + max(sg_sender_gap,
1014                                         last_action->sender.size / bw);
1015       action->latency += action->sender.gap;
1016     }
1017     /* Append action as last send */
1018     action->sender.link_name = link->lmm_resource.generic_resource.name;
1019     fifo =
1020         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1021                                           action->sender.link_name);
1022     if (!fifo) {
1023       fifo = xbt_fifo_new();
1024       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1025     }
1026     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1027     action->sender.size = size;
1028   }
1029 }
1030
1031 static void smpi_gap_remove(surf_action_network_CM02_t action)
1032 {
1033   xbt_fifo_t fifo;
1034   size_t size;
1035
1036   if (sg_sender_gap > 0.0 && action->sender.link_name
1037       && action->sender.fifo_item) {
1038     fifo =
1039         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1040                                           action->sender.link_name);
1041     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1042     size = xbt_fifo_size(fifo);
1043     if (size == 0) {
1044       xbt_fifo_free(fifo);
1045       xbt_dict_remove(gap_lookup, action->sender.link_name);
1046       size = xbt_dict_length(gap_lookup);
1047       if (size == 0) {
1048         xbt_dict_free(&gap_lookup);
1049       }
1050     }
1051   }
1052 }
1053
1054 static void surf_network_model_init_internal(void)
1055 {
1056   s_surf_action_network_CM02_t comm;
1057   surf_network_model = surf_model_init();
1058
1059   surf_network_model->name = "network";
1060   surf_network_model->action_unref = net_action_unref;
1061   surf_network_model->action_cancel = net_action_cancel;
1062   surf_network_model->action_recycle = net_action_recycle;
1063   surf_network_model->get_remains = net_action_get_remains;
1064 #ifdef HAVE_LATENCY_BOUND_TRACKING
1065   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1066 #endif
1067 #ifdef HAVE_TRACING
1068   surf_network_model->set_category = net_action_set_category;
1069 #endif
1070
1071   surf_network_model->model_private->resource_used = net_resource_used;
1072   if (network_update_mechanism == UM_LAZY) {
1073     surf_network_model->model_private->share_resources =
1074         net_share_resources_lazy;
1075     surf_network_model->model_private->update_actions_state =
1076         net_update_actions_state_lazy;
1077   } else if (network_update_mechanism == UM_FULL) {
1078     surf_network_model->model_private->share_resources =
1079         net_share_resources_full;
1080     surf_network_model->model_private->update_actions_state =
1081         net_update_actions_state_full;
1082   }
1083
1084   surf_network_model->model_private->update_resource_state =
1085       net_update_resource_state;
1086   surf_network_model->model_private->finalize = net_finalize;
1087
1088   surf_network_model->suspend = net_action_suspend;
1089   surf_network_model->resume = net_action_resume;
1090   surf_network_model->is_suspended = net_action_is_suspended;
1091   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1092
1093   surf_network_model->extension.network.communicate = net_communicate;
1094   surf_network_model->extension.network.get_route = net_get_route;
1095   surf_network_model->extension.network.get_link_bandwidth =
1096       net_get_link_bandwidth;
1097   surf_network_model->extension.network.get_link_latency =
1098       net_get_link_latency;
1099   surf_network_model->extension.network.link_shared = net_link_shared;
1100   surf_network_model->extension.network.add_traces = net_add_traces;
1101   surf_network_model->extension.network.create_resource =
1102       net_create_resource;
1103
1104   if (!network_maxmin_system)
1105     network_maxmin_system = lmm_system_new(net_selective_update);
1106
1107   routing_model_create(sizeof(link_CM02_t),
1108                        net_create_resource("__loopback__",
1109                                            498000000, NULL, 0.000015, NULL,
1110                                            SURF_RESOURCE_ON, NULL,
1111                                            SURF_LINK_FATPIPE, NULL));
1112
1113   if (network_update_mechanism == UM_LAZY) {
1114     net_action_heap = xbt_heap_new(8, NULL);
1115     xbt_heap_set_update_callback(net_action_heap,
1116                                  net_action_update_index_heap);
1117     net_modified_set =
1118         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1119     network_maxmin_system->keep_track = net_modified_set;
1120   }
1121 }
1122
1123 static void set_update_mechanism(void)
1124 {
1125 #ifdef HAVE_TRACING
1126   TRACE_set_network_update_mechanism();
1127 #endif
1128
1129   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1130   int select =
1131       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1132
1133   if (!strcmp(optim, "Full")) {
1134     network_update_mechanism = UM_FULL;
1135     net_selective_update = select;
1136   } else if (!strcmp(optim, "Lazy")) {
1137     network_update_mechanism = UM_LAZY;
1138     net_selective_update = 1;
1139     xbt_assert((select == 1)
1140                ||
1141                (xbt_cfg_is_default_value
1142                 (_surf_cfg_set, "network/maxmin_selective_update")),
1143                "Disabling selective update while using the lazy update mechanism is dumb!");
1144   } else {
1145     xbt_die("Unsupported optimization (%s) for this model", optim);
1146   }
1147 }
1148
1149 /************************************************************************/
1150 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1151 /************************************************************************/
1152 /* @Inproceedings{smpi_ipdps, */
1153 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1154 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1155 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1156 /*  address={Anchorage (Alaska) USA}, */
1157 /*  month=may, */
1158 /*  year={2011} */
1159 /*  } */
1160 void surf_network_model_init_SMPI(void)
1161 {
1162
1163   if (surf_network_model)
1164     return;
1165   set_update_mechanism();
1166
1167   surf_network_model_init_internal();
1168   latency_factor_callback = &smpi_latency_factor;
1169   bandwidth_factor_callback = &smpi_bandwidth_factor;
1170   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1171   gap_append = &smpi_gap_append;
1172   gap_remove = &smpi_gap_remove;
1173   net_define_callbacks();
1174   xbt_dynar_push(model_list, &surf_network_model);
1175   network_solve = lmm_solve;
1176
1177   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1178   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1179 }
1180
1181 /************************************************************************/
1182 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1183 /************************************************************************/
1184 /* @techreport{VELHO:2011:HAL-00646896:1, */
1185 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1186 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1187 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1188 /*      type = {Rapport de recherche}, */
1189 /*      institution = {INRIA}, */
1190 /*      number = {RR-7821}, */
1191 /*      year = {2011}, */
1192 /*      month = Nov, */
1193 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1194 /*  } */
1195 void surf_network_model_init_LegrandVelho(void)
1196 {
1197   if (surf_network_model)
1198     return;
1199
1200   set_update_mechanism();
1201
1202   surf_network_model_init_internal();
1203   net_define_callbacks();
1204   xbt_dynar_push(model_list, &surf_network_model);
1205   network_solve = lmm_solve;
1206
1207   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1208                             13.01);
1209   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1210                             0.97);
1211   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1212 }
1213
1214 /***************************************************************************/
1215 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1216 /***************************************************************************/
1217 /* @TechReport{      rr-lip2002-40, */
1218 /*   author        = {Henri Casanova and Loris Marchal}, */
1219 /*   institution   = {LIP}, */
1220 /*   title         = {A Network Model for Simulation of Grid Application}, */
1221 /*   number        = {2002-40}, */
1222 /*   month         = {oct}, */
1223 /*   year          = {2002} */
1224 /* } */
1225 void surf_network_model_init_CM02(void)
1226 {
1227
1228   if (surf_network_model)
1229     return;
1230
1231   set_update_mechanism();
1232   surf_network_model_init_internal();
1233   net_define_callbacks();
1234   xbt_dynar_push(model_list, &surf_network_model);
1235   network_solve = lmm_solve;
1236
1237   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1238   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1239                             1.0);
1240   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1241 }
1242
1243 /***************************************************************************/
1244 /* The models from Steven H. Low                                           */
1245 /***************************************************************************/
1246 /* @article{Low03,                                                         */
1247 /*   author={Steven H. Low},                                               */
1248 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1249 /*   year={2003},                                                          */
1250 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1251 /*    volume={11}, number={4},                                             */
1252 /*  }                                                                      */
1253 void surf_network_model_init_Reno(void)
1254 {
1255   if (surf_network_model)
1256     return;
1257
1258   set_update_mechanism();
1259   surf_network_model_init_internal();
1260   net_define_callbacks();
1261
1262   xbt_dynar_push(model_list, &surf_network_model);
1263   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1264                                     func_reno_fpi);
1265   network_solve = lagrange_solve;
1266
1267   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1268   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1269                             0.92);
1270   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1271 }
1272
1273
1274 void surf_network_model_init_Reno2(void)
1275 {
1276   if (surf_network_model)
1277     return;
1278
1279   set_update_mechanism();
1280   surf_network_model_init_internal();
1281   net_define_callbacks();
1282
1283   xbt_dynar_push(model_list, &surf_network_model);
1284   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1285                                     func_reno2_fpi);
1286   network_solve = lagrange_solve;
1287
1288   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1289   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1290                             0.92);
1291   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1292                             8775);
1293 }
1294
1295 void surf_network_model_init_Vegas(void)
1296 {
1297   if (surf_network_model)
1298     return;
1299
1300   set_update_mechanism();
1301   surf_network_model_init_internal();
1302   net_define_callbacks();
1303
1304   xbt_dynar_push(model_list, &surf_network_model);
1305   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1306                                     func_vegas_fpi);
1307   network_solve = lagrange_solve;
1308
1309   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1310   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1311                             0.92);
1312   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1313 }