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
  49 double sg_sender_gap = 0.0;
  50 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  51 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  52 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  53
  54 double sg_tcp_gamma = 0.0;
  55 int sg_network_crosstraffic = 0;
  56
  57 xbt_dict_t gap_lookup = NULL;
  58
  59 e_UM_t network_update_mechanism = UM_UNDEFINED;
  60 static int net_selective_update = 0;
  61
  62 static int net_action_is_suspended(surf_action_t action);
  63 static void net_update_action_remaining_lazy(double now);
  64
  65 static xbt_swag_t net_modified_set = NULL;
  66 static xbt_heap_t net_action_heap = NULL;
  67
  68
  69 /******************************************************************************/
  70 /*                           Factors callbacks                                */
  71 /******************************************************************************/
  72 static double constant_latency_factor(double size)
  73 {
  74   return sg_latency_factor;
  75 }
  76
  77 static double constant_bandwidth_factor(double size)
  78 {
  79   return sg_bandwidth_factor;
  80 }
  81
  82 static double constant_bandwidth_constraint(double rate, double bound,
  83                                             double size)
  84 {
  85   return rate;
  86 }
  87
  88 /**********************/
  89 /*   SMPI callbacks   */
  90 /**********************/
  91 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
  92 {
  93   char *value = NULL;
  94   unsigned int iter = 0;
  95   s_smpi_factor_t fact;
  96   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
  97
  98   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
  99   radical_elements = xbt_str_split(smpi_coef_string, ";");
 100   xbt_dynar_foreach(radical_elements, iter, value) {
 101
 102     radical_elements2 = xbt_str_split(value, ":");
 103     if (xbt_dynar_length(radical_elements2) != 2)
 104       xbt_die("Malformed radical for smpi factor!");
 105     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 106     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 107     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 108     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 109     xbt_dynar_free(&radical_elements2);
 110   }
 111   xbt_dynar_free(&radical_elements);
 112   return smpi_factor;
 113 }
 114
 115 static double smpi_bandwidth_factor(double size)
 116 {
 117   if (!smpi_bw_factor)
 118     smpi_bw_factor =
 119         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 120
 121   unsigned int iter = 0;
 122   s_smpi_factor_t fact;
 123   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 124     if (size >= fact.factor) {
 125       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 126       return fact.value;
 127     }
 128   }
 129
 130   return 1.0;
 131 }
 132
 133 static double smpi_latency_factor(double size)
 134 {
 135   if (!smpi_lat_factor)
 136     smpi_lat_factor =
 137         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 138
 139   unsigned int iter = 0;
 140   s_smpi_factor_t fact;
 141   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 142     if (size >= fact.factor) {
 143       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 144       return fact.value;
 145     }
 146   }
 147
 148   return 1.0;
 149 }
 150
 151 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 152
 153 static double smpi_bandwidth_constraint(double rate, double bound,
 154                                         double size)
 155 {
 156   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 157 }
 158
 159 static double (*latency_factor_callback) (double) =
 160     &constant_latency_factor;
 161 static double (*bandwidth_factor_callback) (double) =
 162     &constant_bandwidth_factor;
 163 static double (*bandwidth_constraint_callback) (double, double, double) =
 164     &constant_bandwidth_constraint;
 165
 166 static void (*gap_append) (double, const link_CM02_t,
 167                            surf_action_network_CM02_t) = NULL;
 168 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 169
 170 static void *net_create_resource(const char *name,
 171                                  double bw_initial,
 172                                  tmgr_trace_t bw_trace,
 173                                  double lat_initial,
 174                                  tmgr_trace_t lat_trace,
 175                                  e_surf_resource_state_t
 176                                  state_initial,
 177                                  tmgr_trace_t state_trace,
 178                                  e_surf_link_sharing_policy_t
 179                                  policy, xbt_dict_t properties)
 180 {
 181   link_CM02_t nw_link = (link_CM02_t)
 182       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 183                             surf_network_model, name, properties,
 184                             network_maxmin_system,
 185                             sg_bandwidth_factor * bw_initial,
 186                             history,
 187                             state_initial, state_trace,
 188                             bw_initial, bw_trace);
 189
 190   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 191              "Link '%s' declared several times in the platform file.",
 192              name);
 193
 194   nw_link->lat_current = lat_initial;
 195   if (lat_trace)
 196     nw_link->lat_event =
 197         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 198
 199   if (policy == SURF_LINK_FATPIPE)
 200     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 201
 202   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 203   XBT_DEBUG("Create link '%s'",name);
 204
 205   return nw_link;
 206 }
 207
 208 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 209 {
 210   if (link->policy == SURF_LINK_FULLDUPLEX) {
 211     char *link_id;
 212     link_id = bprintf("%s_UP", link->id);
 213     net_create_resource(link_id,
 214                         link->bandwidth,
 215                         link->bandwidth_trace,
 216                         link->latency,
 217                         link->latency_trace,
 218                         link->state,
 219                         link->state_trace, link->policy, link->properties);
 220     xbt_free(link_id);
 221     link_id = bprintf("%s_DOWN", link->id);
 222     net_create_resource(link_id,
 223                         link->bandwidth,
 224                         link->bandwidth_trace,
 225                         link->latency,
 226                         link->latency_trace,
 227                         link->state,
 228                         link->state_trace, link->policy, link->properties);
 229     xbt_free(link_id);
 230   } else {
 231     net_create_resource(link->id,
 232                         link->bandwidth,
 233                         link->bandwidth_trace,
 234                         link->latency,
 235                         link->latency_trace,
 236                         link->state,
 237                         link->state_trace, link->policy, link->properties);
 238   }
 239 }
 240
 241 static void net_add_traces(void)
 242 {
 243   xbt_dict_cursor_t cursor = NULL;
 244   char *trace_name, *elm;
 245
 246   static int called = 0;
 247   if (called)
 248     return;
 249   called = 1;
 250
 251   /* connect all traces relative to network */
 252   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 253     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 254     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 255
 256     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 257                trace_name, elm);
 258     xbt_assert(trace,
 259                "Cannot connect trace %s to link %s: trace undefined",
 260                trace_name, elm);
 261
 262     link->lmm_resource.state_event =
 263         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 264   }
 265
 266   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 267     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 268     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 269
 270     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 271                trace_name, elm);
 272     xbt_assert(trace,
 273                "Cannot connect trace %s to link %s: trace undefined",
 274                trace_name, elm);
 275
 276     link->lmm_resource.power.event =
 277         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 278   }
 279
 280   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 281     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 282     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 283
 284     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 285                trace_name, elm);
 286     xbt_assert(trace,
 287                "Cannot connect trace %s to link %s: trace undefined",
 288                trace_name, elm);
 289
 290     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 291   }
 292 }
 293
 294 static void net_define_callbacks(void)
 295 {
 296   /* Figuring out the network links */
 297   sg_platf_link_add_cb(net_parse_link_init);
 298   sg_platf_postparse_add_cb(net_add_traces);
 299 }
 300
 301 static int net_resource_used(void *resource_id)
 302 {
 303   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 304                                                      resource_id)->
 305                              constraint);
 306 }
 307
 308 static int net_action_unref(surf_action_t action)
 309 {
 310   action->refcount--;
 311   if (!action->refcount) {
 312     xbt_swag_remove(action, action->state_set);
 313     if (((surf_action_lmm_t)action)->variable) {
 314       lmm_variable_free(network_maxmin_system,
 315                         ((surf_action_lmm_t) action)->variable);
 316     }
 317     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 318       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t) action);
 319       xbt_swag_remove(action, net_modified_set);
 320     }
 321     surf_action_free(&action);
 322     return 1;
 323   }
 324   return 0;
 325 }
 326
 327
 328
 329 static void net_action_cancel(surf_action_t action)
 330 {
 331   XBT_DEBUG("cancel action %p", action);
 332   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 333   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 334     xbt_swag_remove(action, net_modified_set);
 335     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t) action);
 336   }
 337 }
 338
 339 void net_action_recycle(surf_action_t action)
 340 {
 341   return;
 342 }
 343
 344 #ifdef HAVE_LATENCY_BOUND_TRACKING
 345 int net_get_link_latency_limited(surf_action_t action)
 346 {
 347   return action->latency_limited;
 348 }
 349 #endif
 350
 351 double net_action_get_remains(surf_action_t action)
 352 {
 353   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 354     net_update_action_remaining_lazy(surf_get_clock());
 355   return action->remains;
 356 }
 357
 358 static void net_update_action_remaining_lazy(double now)
 359 {
 360   surf_action_lmm_t action = NULL;
 361   double delta = 0.0;
 362
 363   xbt_swag_foreach(action, net_modified_set) {
 364
 365     if (action->suspended != 0) {
 366       continue;
 367     }
 368
 369     delta = now - action->last_update;
 370
 371     double_update(&(((surf_action_t)action)->remains),
 372                   lmm_variable_getvalue(action->variable) * delta);
 373
 374     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 375       double_update(&(((surf_action_t)action)->max_duration), delta);
 376
 377     if ((((surf_action_t)action)->remains <= 0) &&
 378         (lmm_get_variable_weight(action->variable) > 0)) {
 379       ((surf_action_t)action)->finish = surf_get_clock();
 380       surf_network_model->action_state_set((surf_action_t) action,
 381                                            SURF_ACTION_DONE);
 382       surf_action_lmm_heap_remove(net_action_heap,action);
 383     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 384                && (((surf_action_t)action)->max_duration <= 0))) {
 385       ((surf_action_t)action)->finish = surf_get_clock();
 386       surf_network_model->action_state_set((surf_action_t) action,
 387                                            SURF_ACTION_DONE);
 388       surf_action_lmm_heap_remove(net_action_heap,action);
 389     }
 390
 391     action->last_update = now;
 392   }
 393 }
 394
 395 static double net_share_resources_full(double now)
 396 {
 397   s_surf_action_lmm_t s_action;
 398   surf_action_network_CM02_t action = NULL;
 399   xbt_swag_t running_actions =
 400       surf_network_model->states.running_action_set;
 401   double min;
 402
 403   min = generic_maxmin_share_resources(running_actions,
 404                                        xbt_swag_offset(s_action,
 405                                                        variable),
 406                                        network_maxmin_system,
 407                                        network_solve);
 408
 409 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 410
 411   xbt_swag_foreach(action, running_actions) {
 412 #ifdef HAVE_LATENCY_BOUND_TRACKING
 413     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 414       action->latency_limited = 1;
 415     } else {
 416       action->latency_limited = 0;
 417     }
 418 #endif
 419     if (action->latency > 0) {
 420       min = (min < 0) ? action->latency : min(min, action->latency);
 421     }
 422   }
 423
 424   XBT_DEBUG("Min of share resources %f", min);
 425
 426   return min;
 427 }
 428
 429 static double net_share_resources_lazy(double now)
 430 {
 431   surf_action_network_CM02_t action = NULL;
 432   double min = -1;
 433   double value;
 434
 435   XBT_DEBUG
 436       ("Before share resources, the size of modified actions set is %d",
 437        xbt_swag_size(net_modified_set));
 438   net_update_action_remaining_lazy(now);
 439
 440   lmm_solve(network_maxmin_system);
 441
 442   XBT_DEBUG
 443       ("After share resources, The size of modified actions set is %d",
 444        xbt_swag_size(net_modified_set));
 445
 446   xbt_swag_foreach(action, net_modified_set) {
 447     int max_dur_flag = 0;
 448
 449     if (GENERIC_ACTION(action).state_set !=
 450         surf_network_model->states.running_action_set)
 451       continue;
 452
 453     /* bogus priority, skip it */
 454     if (GENERIC_ACTION(action).priority <= 0)
 455       continue;
 456
 457     min = -1;
 458     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 459     if (value > 0) {
 460       if (GENERIC_ACTION(action).remains > 0) {
 461         value = GENERIC_ACTION(action).remains / value;
 462         min = now + value;
 463       } else {
 464         value = 0.0;
 465         min = now;
 466       }
 467     }
 468
 469     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 470         && (min == -1
 471             || GENERIC_ACTION(action).start +
 472             GENERIC_ACTION(action).max_duration < min)) {
 473       min = GENERIC_ACTION(action).start +
 474           GENERIC_ACTION(action).max_duration;
 475       max_dur_flag = 1;
 476     }
 477
 478     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 479               GENERIC_ACTION(action).start, now + value,
 480               GENERIC_ACTION(action).max_duration);
 481
 482     if (min != -1) {
 483       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 484       surf_action_lmm_heap_insert(net_action_heap,(surf_action_lmm_t)action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 485       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 486                 now);
 487     } else DIE_IMPOSSIBLE;
 488   }
 489
 490   //hereafter must have already the min value for this resource model
 491   if (xbt_heap_size(net_action_heap) > 0)
 492     min = xbt_heap_maxkey(net_action_heap) - now;
 493   else
 494     min = -1;
 495
 496   XBT_DEBUG("The minimum with the HEAP %lf", min);
 497
 498   return min;
 499 }
 500
 501 static void net_update_actions_state_full(double now, double delta)
 502 {
 503   double deltap = 0.0;
 504   surf_action_network_CM02_t action = NULL;
 505   surf_action_network_CM02_t next_action = NULL;
 506   xbt_swag_t running_actions =
 507       surf_network_model->states.running_action_set;
 508   /*
 509      xbt_swag_t failed_actions =
 510      surf_network_model->states.failed_action_set;
 511    */
 512
 513   xbt_swag_foreach_safe(action, next_action, running_actions) {
 514     deltap = delta;
 515     if (action->latency > 0) {
 516       if (action->latency > deltap) {
 517         double_update(&(action->latency), deltap);
 518         deltap = 0.0;
 519       } else {
 520         double_update(&(deltap), action->latency);
 521         action->latency = 0.0;
 522       }
 523       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 524         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 525                                    action->weight);
 526     }
 527 #ifdef HAVE_TRACING
 528     if (TRACE_is_enabled()) {
 529       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 530       unsigned int i;
 531       for (i = 0; i < n; i++){
 532         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 533                                                             GENERIC_LMM_ACTION(action).variable,
 534                                                             i);
 535         link_CM02_t link = lmm_constraint_id(constraint);
 536         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 537                                         ((surf_action_t)action)->category,
 538                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 539                                         now - delta,
 540                                         delta);
 541       }
 542     }
 543 #endif
 544     if (!lmm_get_number_of_cnst_from_var
 545         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 546       /* There is actually no link used, hence an infinite bandwidth.
 547        * This happens often when using models like vivaldi.
 548        * In such case, just make sure that the action completes immediately.
 549        */
 550       double_update(&(GENERIC_ACTION(action).remains),
 551                     GENERIC_ACTION(action).remains);
 552     }
 553     double_update(&(GENERIC_ACTION(action).remains),
 554                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 555     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 556       double_update(&(((surf_action_t)action)->max_duration), delta);
 557
 558     if ((GENERIC_ACTION(action).remains <= 0) &&
 559         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 560       ((surf_action_t)action)->finish = surf_get_clock();
 561       surf_network_model->action_state_set((surf_action_t) action,
 562                                            SURF_ACTION_DONE);
 563
 564       if (gap_remove)
 565         gap_remove(action);
 566     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 567                && (((surf_action_t)action)->max_duration <= 0)) {
 568       ((surf_action_t)action)->finish = surf_get_clock();
 569       surf_network_model->action_state_set((surf_action_t) action,
 570                                            SURF_ACTION_DONE);
 571       if (gap_remove)
 572         gap_remove(action);
 573     }
 574   }
 575
 576   return;
 577 }
 578
 579 static void net_update_actions_state_lazy(double now, double delta)
 580 {
 581   surf_action_network_CM02_t action = NULL;
 582
 583   while ((xbt_heap_size(net_action_heap) > 0)
 584          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 585     action = xbt_heap_pop(net_action_heap);
 586     XBT_DEBUG("Action %p: finish", action);
 587     GENERIC_ACTION(action).finish = surf_get_clock();
 588 #ifdef HAVE_TRACING
 589     if (TRACE_is_enabled()) {
 590       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 591       unsigned int i;
 592       for (i = 0; i < n; i++){
 593         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 594                                                             GENERIC_LMM_ACTION(action).variable,
 595                                                             i);
 596         link_CM02_t link = lmm_constraint_id(constraint);
 597         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 598                                         ((surf_action_t)action)->category,
 599                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 600                                         GENERIC_LMM_ACTION(action).last_update,
 601                                         now - GENERIC_LMM_ACTION(action).last_update);
 602       }
 603     }
 604 #endif
 605
 606     // if I am wearing a latency hat
 607     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 608       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 609                                  action->weight);
 610       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 611       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 612
 613       // if I am wearing a max_duration or normal hat
 614     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 615         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 616       // no need to communicate anymore
 617       // assume that flows that reached max_duration have remaining of 0
 618       GENERIC_ACTION(action).remains = 0;
 619       ((surf_action_t)action)->finish = surf_get_clock();
 620       surf_network_model->action_state_set((surf_action_t) action,
 621                                            SURF_ACTION_DONE);
 622       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 623     }
 624   }
 625   return;
 626 }
 627
 628 static void net_update_resource_state(void *id,
 629                                       tmgr_trace_event_t event_type,
 630                                       double value, double date)
 631 {
 632   link_CM02_t nw_link = id;
 633   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 634   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 635   /*     value, event_type); */
 636
 637   if (event_type == nw_link->lmm_resource.power.event) {
 638     double delta =
 639         sg_weight_S_parameter / value - sg_weight_S_parameter /
 640         (nw_link->lmm_resource.power.peak *
 641          nw_link->lmm_resource.power.scale);
 642     lmm_variable_t var = NULL;
 643     lmm_element_t elem = NULL;
 644     surf_action_network_CM02_t action = NULL;
 645
 646     nw_link->lmm_resource.power.peak = value;
 647     lmm_update_constraint_bound(network_maxmin_system,
 648                                 nw_link->lmm_resource.constraint,
 649                                 sg_bandwidth_factor *
 650                                 (nw_link->lmm_resource.power.peak *
 651                                  nw_link->lmm_resource.power.scale));
 652 #ifdef HAVE_TRACING
 653     TRACE_surf_link_set_bandwidth(date,
 654                                   (char
 655                                    *) (((nw_link->lmm_resource).
 656                                         generic_resource).name),
 657                                   sg_bandwidth_factor *
 658                                   (nw_link->lmm_resource.power.peak *
 659                                    nw_link->lmm_resource.power.scale));
 660 #endif
 661     if (sg_weight_S_parameter > 0) {
 662       while ((var = lmm_get_var_from_cnst
 663               (network_maxmin_system, nw_link->lmm_resource.constraint,
 664                &elem))) {
 665         action = lmm_variable_id(var);
 666         action->weight += delta;
 667         if (!(GENERIC_LMM_ACTION(action).suspended))
 668           lmm_update_variable_weight(network_maxmin_system,
 669                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 670       }
 671     }
 672     if (tmgr_trace_event_free(event_type))
 673       nw_link->lmm_resource.power.event = NULL;
 674   } else if (event_type == nw_link->lat_event) {
 675     double delta = value - nw_link->lat_current;
 676     lmm_variable_t var = NULL;
 677     lmm_element_t elem = NULL;
 678     surf_action_network_CM02_t action = NULL;
 679
 680     nw_link->lat_current = value;
 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->lat_current += delta;
 686       action->weight += delta;
 687       if (action->rate < 0)
 688         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 689                                   sg_tcp_gamma / (2.0 *
 690                                                   action->lat_current));
 691       else {
 692         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 693                                   min(action->rate,
 694                                       sg_tcp_gamma / (2.0 *
 695                                                       action->
 696                                                       lat_current)));
 697
 698         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 699           XBT_INFO("Flow is limited BYBANDWIDTH");
 700         } else {
 701           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 702                    action->lat_current);
 703         }
 704       }
 705       if (!(GENERIC_LMM_ACTION(action).suspended))
 706         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 707                                    action->weight);
 708
 709     }
 710     if (tmgr_trace_event_free(event_type))
 711       nw_link->lat_event = NULL;
 712   } else if (event_type == nw_link->lmm_resource.state_event) {
 713     if (value > 0)
 714       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 715     else {
 716       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 717       lmm_variable_t var = NULL;
 718       lmm_element_t elem = NULL;
 719
 720       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 721       while ((var = lmm_get_var_from_cnst
 722               (network_maxmin_system, cnst, &elem))) {
 723         surf_action_t action = lmm_variable_id(var);
 724
 725         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 726             surf_action_state_get(action) == SURF_ACTION_READY) {
 727           action->finish = date;
 728           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 729         }
 730       }
 731     }
 732     if (tmgr_trace_event_free(event_type))
 733       nw_link->lmm_resource.state_event = NULL;
 734   } else {
 735     XBT_CRITICAL("Unknown event ! \n");
 736     xbt_abort();
 737   }
 738
 739   XBT_DEBUG
 740       ("There were a resource state event, need to update actions related to the constraint (%p)",
 741        nw_link->lmm_resource.constraint);
 742   return;
 743 }
 744
 745
 746 static surf_action_t net_communicate(void *src,
 747                                      void *dst, double size,
 748                                      double rate)
 749 {
 750   unsigned int i;
 751   link_CM02_t link;
 752   int failed = 0;
 753   surf_action_network_CM02_t action = NULL;
 754   double bandwidth_bound;
 755   double latency = 0.0;
 756   xbt_dynar_t back_route = NULL;
 757   int constraints_per_variable = 0;
 758
 759   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 760
 761   XBT_IN("(%s,%s,%g,%g)", ((network_element_t)src)->name, ((network_element_t)dst)->name, size, rate);
 762
 763   routing_get_route_and_latency((network_element_t)src, (network_element_t)dst, &route, &latency);
 764   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 765              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 766              ((network_element_t)src)->name, ((network_element_t)dst)->name);
 767
 768   xbt_dynar_foreach(route, i, link) {
 769     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 770       failed = 1;
 771       break;
 772     }
 773   }
 774   if (sg_network_crosstraffic == 1) {
 775     routing_get_route_and_latency((network_element_t)dst, (network_element_t)src, &back_route, NULL);
 776     xbt_dynar_foreach(back_route, i, link) {
 777       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 778         failed = 1;
 779         break;
 780       }
 781     }
 782   }
 783
 784   action =
 785       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 786                       surf_network_model, failed);
 787 #ifdef HAVE_LATENCY_BOUND_TRACKING
 788   action->latency_limited = 0;
 789 #endif
 790   action->weight = action->latency = latency;
 791
 792   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 793   action->rate = rate;
 794   if (network_update_mechanism == UM_LAZY) {
 795     GENERIC_LMM_ACTION(action).index_heap = -1;
 796     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 797   }
 798
 799   bandwidth_bound = -1.0;
 800   if (sg_weight_S_parameter > 0) {
 801     xbt_dynar_foreach(route, i, link) {
 802       action->weight +=
 803           sg_weight_S_parameter /
 804           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 805     }
 806   }
 807   xbt_dynar_foreach(route, i, link) {
 808     double bb = bandwidth_factor_callback(size) *
 809         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 810     bandwidth_bound =
 811         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 812   }
 813
 814   action->lat_current = action->latency;
 815   action->latency *= latency_factor_callback(size);
 816   action->rate =
 817       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 818   if (gap_append) {
 819     xbt_assert(!xbt_dynar_is_empty(route),
 820                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 821
 822     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 823     gap_append(size, link, action);
 824     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 825               action, ((network_element_t)src)->name, ((network_element_t)dst)->name, action->sender.gap,
 826               action->latency);
 827   }
 828
 829   constraints_per_variable = xbt_dynar_length(route);
 830   if (back_route != NULL)
 831     constraints_per_variable += xbt_dynar_length(back_route);
 832
 833   if (action->latency > 0) {
 834     GENERIC_LMM_ACTION(action).variable =
 835         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 836                          constraints_per_variable);
 837     if (network_update_mechanism == UM_LAZY) {
 838       // add to the heap the event when the latency is payed
 839       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 840                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 841       surf_action_lmm_heap_insert(net_action_heap,(surf_action_lmm_t)action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 842                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 843     }
 844   } else
 845     GENERIC_LMM_ACTION(action).variable =
 846         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 847                          constraints_per_variable);
 848
 849   if (action->rate < 0) {
 850     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 851                               (action->lat_current > 0) ?
 852                               sg_tcp_gamma / (2.0 *
 853                                               action->lat_current) : -1.0);
 854   } else {
 855     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 856                               (action->lat_current > 0) ?
 857                               min(action->rate,
 858                                   sg_tcp_gamma / (2.0 *
 859                                                   action->lat_current))
 860                               : action->rate);
 861   }
 862
 863   xbt_dynar_foreach(route, i, link) {
 864     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 865                GENERIC_LMM_ACTION(action).variable, 1.0);
 866   }
 867
 868   if (sg_network_crosstraffic == 1) {
 869     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 870     xbt_dynar_foreach(back_route, i, link) {
 871       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 872                  GENERIC_LMM_ACTION(action).variable, .05);
 873     }
 874   }
 875
 876   xbt_dynar_free(&route);
 877   XBT_OUT();
 878
 879   return (surf_action_t) action;
 880 }
 881
 882 static xbt_dynar_t net_get_route(void *src, void *dst)
 883 {
 884   xbt_dynar_t route = NULL;
 885   routing_get_route_and_latency(src, dst, &route, NULL);
 886   return route;
 887 }
 888
 889 static double net_get_link_bandwidth(const void *link)
 890 {
 891   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 892   return lmm->power.peak * lmm->power.scale;
 893 }
 894
 895 static double net_get_link_latency(const void *link)
 896 {
 897   return ((link_CM02_t) link)->lat_current;
 898 }
 899
 900 static int net_link_shared(const void *link)
 901 {
 902   return
 903       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 904 }
 905
 906 static void net_action_suspend(surf_action_t action)
 907 {
 908   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 909   lmm_update_variable_weight(network_maxmin_system,
 910                              ((surf_action_network_CM02_t)
 911                               action)->generic_lmm_action.variable, 0.0);
 912
 913   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 914     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 915 }
 916
 917 static void net_action_resume(surf_action_t action)
 918 {
 919   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 920     lmm_update_variable_weight(network_maxmin_system,
 921                                ((surf_action_network_CM02_t)
 922                                 action)->generic_lmm_action.variable,
 923                                ((surf_action_network_CM02_t)
 924                                 action)->weight);
 925     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 926     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 927       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 928   }
 929 }
 930
 931 static int net_action_is_suspended(surf_action_t action)
 932 {
 933   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 934 }
 935
 936 void net_action_set_max_duration(surf_action_t action, double duration)
 937 {
 938   action->max_duration = duration;
 939   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 940     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 941 }
 942
 943 #ifdef HAVE_TRACING
 944 static void net_action_set_category(surf_action_t action,
 945                                     const char *category)
 946 {
 947   action->category = xbt_strdup(category);
 948 }
 949 #endif
 950
 951 static void net_finalize(void)
 952 {
 953   surf_model_exit(surf_network_model);
 954   surf_network_model = NULL;
 955
 956   lmm_system_free(network_maxmin_system);
 957   network_maxmin_system = NULL;
 958
 959   if (network_update_mechanism == UM_LAZY) {
 960     xbt_heap_free(net_action_heap);
 961     xbt_swag_free(net_modified_set);
 962   }
 963
 964   if (smpi_bw_factor)
 965     xbt_dynar_free(&smpi_bw_factor);
 966   if (smpi_lat_factor)
 967     xbt_dynar_free(&smpi_lat_factor);
 968 }
 969
 970 static void smpi_gap_append(double size, const link_CM02_t link,
 971                             surf_action_network_CM02_t action)
 972 {
 973   const char *src = link->lmm_resource.generic_resource.name;
 974   xbt_fifo_t fifo;
 975   surf_action_network_CM02_t last_action;
 976   double bw;
 977
 978   if (sg_sender_gap > 0.0) {
 979     if (!gap_lookup) {
 980       gap_lookup = xbt_dict_new();
 981     }
 982     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
 983     action->sender.gap = 0.0;
 984     if (fifo && xbt_fifo_size(fifo) > 0) {
 985       /* Compute gap from last send */
 986       last_action =
 987           (surf_action_network_CM02_t)
 988           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 989       bw = net_get_link_bandwidth(link);
 990       action->sender.gap =
 991           last_action->sender.gap + max(sg_sender_gap,
 992                                         last_action->sender.size / bw);
 993       action->latency += action->sender.gap;
 994     }
 995     /* Append action as last send */
 996     action->sender.link_name = link->lmm_resource.generic_resource.name;
 997     fifo =
 998         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
 999                                           action->sender.link_name);
1000     if (!fifo) {
1001       fifo = xbt_fifo_new();
1002       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1003     }
1004     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1005     action->sender.size = size;
1006   }
1007 }
1008
1009 static void smpi_gap_remove(surf_action_network_CM02_t action)
1010 {
1011   xbt_fifo_t fifo;
1012   size_t size;
1013
1014   if (sg_sender_gap > 0.0 && action->sender.link_name
1015       && action->sender.fifo_item) {
1016     fifo =
1017         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1018                                           action->sender.link_name);
1019     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1020     size = xbt_fifo_size(fifo);
1021     if (size == 0) {
1022       xbt_fifo_free(fifo);
1023       xbt_dict_remove(gap_lookup, action->sender.link_name);
1024       size = xbt_dict_length(gap_lookup);
1025       if (size == 0) {
1026         xbt_dict_free(&gap_lookup);
1027       }
1028     }
1029   }
1030 }
1031
1032 static void surf_network_model_init_internal(void)
1033 {
1034   s_surf_action_network_CM02_t comm;
1035   surf_network_model = surf_model_init();
1036
1037   surf_network_model->name = "network";
1038   surf_network_model->action_unref = net_action_unref;
1039   surf_network_model->action_cancel = net_action_cancel;
1040   surf_network_model->action_recycle = net_action_recycle;
1041   surf_network_model->get_remains = net_action_get_remains;
1042 #ifdef HAVE_LATENCY_BOUND_TRACKING
1043   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1044 #endif
1045 #ifdef HAVE_TRACING
1046   surf_network_model->set_category = net_action_set_category;
1047 #endif
1048
1049   surf_network_model->model_private->resource_used = net_resource_used;
1050   if (network_update_mechanism == UM_LAZY) {
1051     surf_network_model->model_private->share_resources =
1052         net_share_resources_lazy;
1053     surf_network_model->model_private->update_actions_state =
1054         net_update_actions_state_lazy;
1055   } else if (network_update_mechanism == UM_FULL) {
1056     surf_network_model->model_private->share_resources =
1057         net_share_resources_full;
1058     surf_network_model->model_private->update_actions_state =
1059         net_update_actions_state_full;
1060   }
1061
1062   surf_network_model->model_private->update_resource_state =
1063       net_update_resource_state;
1064   surf_network_model->model_private->finalize = net_finalize;
1065
1066   surf_network_model->suspend = net_action_suspend;
1067   surf_network_model->resume = net_action_resume;
1068   surf_network_model->is_suspended = net_action_is_suspended;
1069   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1070
1071   surf_network_model->extension.network.communicate = net_communicate;
1072   surf_network_model->extension.network.get_route = net_get_route;
1073   surf_network_model->extension.network.get_link_bandwidth =
1074       net_get_link_bandwidth;
1075   surf_network_model->extension.network.get_link_latency =
1076       net_get_link_latency;
1077   surf_network_model->extension.network.link_shared = net_link_shared;
1078   surf_network_model->extension.network.add_traces = net_add_traces;
1079   surf_network_model->extension.network.create_resource =
1080       net_create_resource;
1081
1082   if (!network_maxmin_system)
1083     network_maxmin_system = lmm_system_new(net_selective_update);
1084
1085   routing_model_create(sizeof(link_CM02_t),
1086                        net_create_resource("__loopback__",
1087                                            498000000, NULL, 0.000015, NULL,
1088                                            SURF_RESOURCE_ON, NULL,
1089                                            SURF_LINK_FATPIPE, NULL));
1090
1091   if (network_update_mechanism == UM_LAZY) {
1092     net_action_heap = xbt_heap_new(8, NULL);
1093     xbt_heap_set_update_callback(net_action_heap,
1094                                  surf_action_lmm_update_index_heap);
1095     net_modified_set =
1096         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1097     network_maxmin_system->keep_track = net_modified_set;
1098   }
1099 }
1100
1101 static void set_update_mechanism(void)
1102 {
1103   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1104   int select =
1105       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1106
1107   if (!strcmp(optim, "Full")) {
1108     network_update_mechanism = UM_FULL;
1109     net_selective_update = select;
1110   } else if (!strcmp(optim, "Lazy")) {
1111     network_update_mechanism = UM_LAZY;
1112     net_selective_update = 1;
1113     xbt_assert((select == 1)
1114                ||
1115                (xbt_cfg_is_default_value
1116                 (_surf_cfg_set, "network/maxmin_selective_update")),
1117                "Disabling selective update while using the lazy update mechanism is dumb!");
1118   } else {
1119     xbt_die("Unsupported optimization (%s) for this model", optim);
1120   }
1121 }
1122
1123 /************************************************************************/
1124 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1125 /************************************************************************/
1126 /* @Inproceedings{smpi_ipdps, */
1127 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1128 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1129 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1130 /*  address={Anchorage (Alaska) USA}, */
1131 /*  month=may, */
1132 /*  year={2011} */
1133 /*  } */
1134 void surf_network_model_init_SMPI(void)
1135 {
1136
1137   if (surf_network_model)
1138     return;
1139   set_update_mechanism();
1140
1141   surf_network_model_init_internal();
1142   latency_factor_callback = &smpi_latency_factor;
1143   bandwidth_factor_callback = &smpi_bandwidth_factor;
1144   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1145   gap_append = &smpi_gap_append;
1146   gap_remove = &smpi_gap_remove;
1147   net_define_callbacks();
1148   xbt_dynar_push(model_list, &surf_network_model);
1149   network_solve = lmm_solve;
1150
1151   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1152   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1153 }
1154
1155 /************************************************************************/
1156 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1157 /************************************************************************/
1158 /* @techreport{VELHO:2011:HAL-00646896:1, */
1159 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1160 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1161 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1162 /*      type = {Rapport de recherche}, */
1163 /*      institution = {INRIA}, */
1164 /*      number = {RR-7821}, */
1165 /*      year = {2011}, */
1166 /*      month = Nov, */
1167 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1168 /*  } */
1169 void surf_network_model_init_LegrandVelho(void)
1170 {
1171   if (surf_network_model)
1172     return;
1173
1174   set_update_mechanism();
1175
1176   surf_network_model_init_internal();
1177   net_define_callbacks();
1178   xbt_dynar_push(model_list, &surf_network_model);
1179   network_solve = lmm_solve;
1180
1181   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1182                             13.01);
1183   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1184                             0.97);
1185   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1186 }
1187
1188 /***************************************************************************/
1189 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1190 /***************************************************************************/
1191 /* @TechReport{      rr-lip2002-40, */
1192 /*   author        = {Henri Casanova and Loris Marchal}, */
1193 /*   institution   = {LIP}, */
1194 /*   title         = {A Network Model for Simulation of Grid Application}, */
1195 /*   number        = {2002-40}, */
1196 /*   month         = {oct}, */
1197 /*   year          = {2002} */
1198 /* } */
1199 void surf_network_model_init_CM02(void)
1200 {
1201
1202   if (surf_network_model)
1203     return;
1204
1205   set_update_mechanism();
1206   surf_network_model_init_internal();
1207   net_define_callbacks();
1208   xbt_dynar_push(model_list, &surf_network_model);
1209   network_solve = lmm_solve;
1210
1211   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1212   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1213                             1.0);
1214   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1215 }
1216
1217 /***************************************************************************/
1218 /* The models from Steven H. Low                                           */
1219 /***************************************************************************/
1220 /* @article{Low03,                                                         */
1221 /*   author={Steven H. Low},                                               */
1222 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1223 /*   year={2003},                                                          */
1224 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1225 /*    volume={11}, number={4},                                             */
1226 /*  }                                                                      */
1227 void surf_network_model_init_Reno(void)
1228 {
1229   if (surf_network_model)
1230     return;
1231
1232   set_update_mechanism();
1233   surf_network_model_init_internal();
1234   net_define_callbacks();
1235
1236   xbt_dynar_push(model_list, &surf_network_model);
1237   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1238                                     func_reno_fpi);
1239   network_solve = lagrange_solve;
1240
1241   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1242   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1243                             0.92);
1244   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1245 }
1246
1247
1248 void surf_network_model_init_Reno2(void)
1249 {
1250   if (surf_network_model)
1251     return;
1252
1253   set_update_mechanism();
1254   surf_network_model_init_internal();
1255   net_define_callbacks();
1256
1257   xbt_dynar_push(model_list, &surf_network_model);
1258   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1259                                     func_reno2_fpi);
1260   network_solve = lagrange_solve;
1261
1262   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1263   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1264                             0.92);
1265   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1266                             8775);
1267 }
1268
1269 void surf_network_model_init_Vegas(void)
1270 {
1271   if (surf_network_model)
1272     return;
1273
1274   set_update_mechanism();
1275   surf_network_model_init_internal();
1276   net_define_callbacks();
1277
1278   xbt_dynar_push(model_list, &surf_network_model);
1279   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1280                                     func_vegas_fpi);
1281   network_solve = lagrange_solve;
1282
1283   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1284   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1285                             0.92);
1286   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1287 }