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 #ifdef HAVE_TRACING
 322     if (action->category) xbt_free (action->category);
 323 #endif
 324     surf_action_free(&action);
 325     return 1;
 326   }
 327   return 0;
 328 }
 329
 330
 331
 332 static void net_action_cancel(surf_action_t action)
 333 {
 334   XBT_DEBUG("cancel action %p", action);
 335   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 336   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 337     xbt_swag_remove(action, net_modified_set);
 338     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t) action);
 339   }
 340 }
 341
 342 void net_action_recycle(surf_action_t action)
 343 {
 344   return;
 345 }
 346
 347 #ifdef HAVE_LATENCY_BOUND_TRACKING
 348 int net_get_link_latency_limited(surf_action_t action)
 349 {
 350   return action->latency_limited;
 351 }
 352 #endif
 353
 354 double net_action_get_remains(surf_action_t action)
 355 {
 356   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 357     net_update_action_remaining_lazy(surf_get_clock());
 358   return action->remains;
 359 }
 360
 361 static void net_update_action_remaining_lazy(double now)
 362 {
 363   surf_action_lmm_t action = NULL;
 364   double delta = 0.0;
 365
 366   xbt_swag_foreach(action, net_modified_set) {
 367
 368     if (action->suspended != 0) {
 369       continue;
 370     }
 371
 372     delta = now - action->last_update;
 373
 374     double_update(&(((surf_action_t)action)->remains),
 375                   lmm_variable_getvalue(action->variable) * delta);
 376
 377     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 378       double_update(&(((surf_action_t)action)->max_duration), delta);
 379
 380     if ((((surf_action_t)action)->remains <= 0) &&
 381         (lmm_get_variable_weight(action->variable) > 0)) {
 382       ((surf_action_t)action)->finish = surf_get_clock();
 383       surf_network_model->action_state_set((surf_action_t) action,
 384                                            SURF_ACTION_DONE);
 385       surf_action_lmm_heap_remove(net_action_heap,action);
 386     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 387                && (((surf_action_t)action)->max_duration <= 0))) {
 388       ((surf_action_t)action)->finish = surf_get_clock();
 389       surf_network_model->action_state_set((surf_action_t) action,
 390                                            SURF_ACTION_DONE);
 391       surf_action_lmm_heap_remove(net_action_heap,action);
 392     }
 393
 394     action->last_update = now;
 395   }
 396 }
 397
 398 static double net_share_resources_full(double now)
 399 {
 400   s_surf_action_lmm_t s_action;
 401   surf_action_network_CM02_t action = NULL;
 402   xbt_swag_t running_actions =
 403       surf_network_model->states.running_action_set;
 404   double min;
 405
 406   min = generic_maxmin_share_resources(running_actions,
 407                                        xbt_swag_offset(s_action,
 408                                                        variable),
 409                                        network_maxmin_system,
 410                                        network_solve);
 411
 412 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 413
 414   xbt_swag_foreach(action, running_actions) {
 415 #ifdef HAVE_LATENCY_BOUND_TRACKING
 416     if (lmm_is_variable_limited_by_latency(GENERIC_LMM_ACTION(action).variable)) {
 417       action->latency_limited = 1;
 418     } else {
 419       action->latency_limited = 0;
 420     }
 421 #endif
 422     if (action->latency > 0) {
 423       min = (min < 0) ? action->latency : min(min, action->latency);
 424     }
 425   }
 426
 427   XBT_DEBUG("Min of share resources %f", min);
 428
 429   return min;
 430 }
 431
 432 static double net_share_resources_lazy(double now)
 433 {
 434   surf_action_network_CM02_t action = NULL;
 435   double min = -1;
 436   double value;
 437
 438   XBT_DEBUG
 439       ("Before share resources, the size of modified actions set is %d",
 440        xbt_swag_size(net_modified_set));
 441   net_update_action_remaining_lazy(now);
 442
 443   lmm_solve(network_maxmin_system);
 444
 445   XBT_DEBUG
 446       ("After share resources, The size of modified actions set is %d",
 447        xbt_swag_size(net_modified_set));
 448
 449   xbt_swag_foreach(action, net_modified_set) {
 450     int max_dur_flag = 0;
 451
 452     if (GENERIC_ACTION(action).state_set !=
 453         surf_network_model->states.running_action_set)
 454       continue;
 455
 456     /* bogus priority, skip it */
 457     if (GENERIC_ACTION(action).priority <= 0)
 458       continue;
 459
 460     min = -1;
 461     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 462     if (value > 0) {
 463       if (GENERIC_ACTION(action).remains > 0) {
 464         value = GENERIC_ACTION(action).remains / value;
 465         min = now + value;
 466       } else {
 467         value = 0.0;
 468         min = now;
 469       }
 470     }
 471
 472     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 473         && (min == -1
 474             || GENERIC_ACTION(action).start +
 475             GENERIC_ACTION(action).max_duration < min)) {
 476       min = GENERIC_ACTION(action).start +
 477           GENERIC_ACTION(action).max_duration;
 478       max_dur_flag = 1;
 479     }
 480
 481     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 482               GENERIC_ACTION(action).start, now + value,
 483               GENERIC_ACTION(action).max_duration);
 484
 485     if (min != -1) {
 486       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 487       surf_action_lmm_heap_insert(net_action_heap,(surf_action_lmm_t)action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 488       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 489                 now);
 490     } else DIE_IMPOSSIBLE;
 491   }
 492
 493   //hereafter must have already the min value for this resource model
 494   if (xbt_heap_size(net_action_heap) > 0)
 495     min = xbt_heap_maxkey(net_action_heap) - now;
 496   else
 497     min = -1;
 498
 499   XBT_DEBUG("The minimum with the HEAP %lf", min);
 500
 501   return min;
 502 }
 503
 504 static void net_update_actions_state_full(double now, double delta)
 505 {
 506   double deltap = 0.0;
 507   surf_action_network_CM02_t action = NULL;
 508   surf_action_network_CM02_t next_action = NULL;
 509   xbt_swag_t running_actions =
 510       surf_network_model->states.running_action_set;
 511   /*
 512      xbt_swag_t failed_actions =
 513      surf_network_model->states.failed_action_set;
 514    */
 515
 516   xbt_swag_foreach_safe(action, next_action, running_actions) {
 517     deltap = delta;
 518     if (action->latency > 0) {
 519       if (action->latency > deltap) {
 520         double_update(&(action->latency), deltap);
 521         deltap = 0.0;
 522       } else {
 523         double_update(&(deltap), action->latency);
 524         action->latency = 0.0;
 525       }
 526       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 527         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 528                                    action->weight);
 529     }
 530 #ifdef HAVE_TRACING
 531     if (TRACE_is_enabled()) {
 532       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 533       unsigned int i;
 534       for (i = 0; i < n; i++){
 535         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 536                                                             GENERIC_LMM_ACTION(action).variable,
 537                                                             i);
 538         link_CM02_t link = lmm_constraint_id(constraint);
 539         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 540                                         ((surf_action_t)action)->category,
 541                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 542                                         lmm_get_cnst_weight_from_var(network_maxmin_system,
 543                                             GENERIC_LMM_ACTION(action).variable,
 544                                             i)),
 545                                         now - delta,
 546                                         delta);
 547       }
 548     }
 549 #endif
 550     if (!lmm_get_number_of_cnst_from_var
 551         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 552       /* There is actually no link used, hence an infinite bandwidth.
 553        * This happens often when using models like vivaldi.
 554        * In such case, just make sure that the action completes immediately.
 555        */
 556       double_update(&(GENERIC_ACTION(action).remains),
 557                     GENERIC_ACTION(action).remains);
 558     }
 559     double_update(&(GENERIC_ACTION(action).remains),
 560                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 561     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 562       double_update(&(((surf_action_t)action)->max_duration), delta);
 563
 564     if ((GENERIC_ACTION(action).remains <= 0) &&
 565         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 566       ((surf_action_t)action)->finish = surf_get_clock();
 567       surf_network_model->action_state_set((surf_action_t) action,
 568                                            SURF_ACTION_DONE);
 569
 570       if (gap_remove)
 571         gap_remove(action);
 572     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 573                && (((surf_action_t)action)->max_duration <= 0)) {
 574       ((surf_action_t)action)->finish = surf_get_clock();
 575       surf_network_model->action_state_set((surf_action_t) action,
 576                                            SURF_ACTION_DONE);
 577       if (gap_remove)
 578         gap_remove(action);
 579     }
 580   }
 581
 582   return;
 583 }
 584
 585 static void net_update_actions_state_lazy(double now, double delta)
 586 {
 587   surf_action_network_CM02_t action = NULL;
 588
 589   while ((xbt_heap_size(net_action_heap) > 0)
 590          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 591     action = xbt_heap_pop(net_action_heap);
 592     XBT_DEBUG("Action %p: finish", action);
 593     GENERIC_ACTION(action).finish = surf_get_clock();
 594 #ifdef HAVE_TRACING
 595     if (TRACE_is_enabled()) {
 596       int n = lmm_get_number_of_cnst_from_var(network_maxmin_system, GENERIC_LMM_ACTION(action).variable);
 597       unsigned int i;
 598       for (i = 0; i < n; i++){
 599         lmm_constraint_t constraint = lmm_get_cnst_from_var(network_maxmin_system,
 600                                                             GENERIC_LMM_ACTION(action).variable,
 601                                                             i);
 602         link_CM02_t link = lmm_constraint_id(constraint);
 603         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 604                                         ((surf_action_t)action)->category,
 605                                         (lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable)*
 606                                             lmm_get_cnst_weight_from_var(network_maxmin_system,
 607                                                 GENERIC_LMM_ACTION(action).variable,
 608                                                 i)),
 609                                         GENERIC_LMM_ACTION(action).last_update,
 610                                         now - GENERIC_LMM_ACTION(action).last_update);
 611       }
 612     }
 613 #endif
 614
 615     // if I am wearing a latency hat
 616     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 617       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 618                                  action->weight);
 619       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 620       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 621
 622       // if I am wearing a max_duration or normal hat
 623     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 624         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 625       // no need to communicate anymore
 626       // assume that flows that reached max_duration have remaining of 0
 627       GENERIC_ACTION(action).remains = 0;
 628       ((surf_action_t)action)->finish = surf_get_clock();
 629       surf_network_model->action_state_set((surf_action_t) action,
 630                                            SURF_ACTION_DONE);
 631       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 632     }
 633   }
 634   return;
 635 }
 636
 637 static void net_update_resource_state(void *id,
 638                                       tmgr_trace_event_t event_type,
 639                                       double value, double date)
 640 {
 641   link_CM02_t nw_link = id;
 642   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 643   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 644   /*     value, event_type); */
 645
 646   if (event_type == nw_link->lmm_resource.power.event) {
 647     double delta =
 648         sg_weight_S_parameter / value - sg_weight_S_parameter /
 649         (nw_link->lmm_resource.power.peak *
 650          nw_link->lmm_resource.power.scale);
 651     lmm_variable_t var = NULL;
 652     lmm_element_t elem = NULL;
 653     surf_action_network_CM02_t action = NULL;
 654
 655     nw_link->lmm_resource.power.peak = value;
 656     lmm_update_constraint_bound(network_maxmin_system,
 657                                 nw_link->lmm_resource.constraint,
 658                                 sg_bandwidth_factor *
 659                                 (nw_link->lmm_resource.power.peak *
 660                                  nw_link->lmm_resource.power.scale));
 661 #ifdef HAVE_TRACING
 662     TRACE_surf_link_set_bandwidth(date,
 663                                   (char
 664                                    *) (((nw_link->lmm_resource).
 665                                         generic_resource).name),
 666                                   sg_bandwidth_factor *
 667                                   (nw_link->lmm_resource.power.peak *
 668                                    nw_link->lmm_resource.power.scale));
 669 #endif
 670     if (sg_weight_S_parameter > 0) {
 671       while ((var = lmm_get_var_from_cnst
 672               (network_maxmin_system, nw_link->lmm_resource.constraint,
 673                &elem))) {
 674         action = lmm_variable_id(var);
 675         action->weight += delta;
 676         if (!(GENERIC_LMM_ACTION(action).suspended))
 677           lmm_update_variable_weight(network_maxmin_system,
 678                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 679       }
 680     }
 681     if (tmgr_trace_event_free(event_type))
 682       nw_link->lmm_resource.power.event = NULL;
 683   } else if (event_type == nw_link->lat_event) {
 684     double delta = value - nw_link->lat_current;
 685     lmm_variable_t var = NULL;
 686     lmm_element_t elem = NULL;
 687     surf_action_network_CM02_t action = NULL;
 688
 689     nw_link->lat_current = value;
 690     while ((var = lmm_get_var_from_cnst
 691             (network_maxmin_system, nw_link->lmm_resource.constraint,
 692              &elem))) {
 693       action = lmm_variable_id(var);
 694       action->lat_current += delta;
 695       action->weight += delta;
 696       if (action->rate < 0)
 697         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 698                                   sg_tcp_gamma / (2.0 *
 699                                                   action->lat_current));
 700       else {
 701         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 702                                   min(action->rate,
 703                                       sg_tcp_gamma / (2.0 *
 704                                                       action->
 705                                                       lat_current)));
 706
 707         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 708           XBT_INFO("Flow is limited BYBANDWIDTH");
 709         } else {
 710           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 711                    action->lat_current);
 712         }
 713       }
 714       if (!(GENERIC_LMM_ACTION(action).suspended))
 715         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 716                                    action->weight);
 717
 718     }
 719     if (tmgr_trace_event_free(event_type))
 720       nw_link->lat_event = NULL;
 721   } else if (event_type == nw_link->lmm_resource.state_event) {
 722     if (value > 0)
 723       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 724     else {
 725       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 726       lmm_variable_t var = NULL;
 727       lmm_element_t elem = NULL;
 728
 729       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 730       while ((var = lmm_get_var_from_cnst
 731               (network_maxmin_system, cnst, &elem))) {
 732         surf_action_t action = lmm_variable_id(var);
 733
 734         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 735             surf_action_state_get(action) == SURF_ACTION_READY) {
 736           action->finish = date;
 737           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 738         }
 739       }
 740     }
 741     if (tmgr_trace_event_free(event_type))
 742       nw_link->lmm_resource.state_event = NULL;
 743   } else {
 744     XBT_CRITICAL("Unknown event ! \n");
 745     xbt_abort();
 746   }
 747
 748   XBT_DEBUG
 749       ("There were a resource state event, need to update actions related to the constraint (%p)",
 750        nw_link->lmm_resource.constraint);
 751   return;
 752 }
 753
 754
 755 static surf_action_t net_communicate(sg_routing_edge_t src,
 756                                      sg_routing_edge_t dst,
 757                                      double size, double rate)
 758 {
 759   unsigned int i;
 760   link_CM02_t link;
 761   int failed = 0;
 762   surf_action_network_CM02_t action = NULL;
 763   double bandwidth_bound;
 764   double latency = 0.0;
 765   xbt_dynar_t back_route = NULL;
 766   int constraints_per_variable = 0;
 767
 768   xbt_dynar_t route = xbt_dynar_new(sizeof(sg_routing_link_t), NULL);
 769
 770   XBT_IN("(%s,%s,%g,%g)", src->name, dst->name, size, rate);
 771
 772   routing_get_route_and_latency(src, dst, &route, &latency);
 773   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 774              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 775              src->name, dst->name);
 776
 777   xbt_dynar_foreach(route, i, link) {
 778     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 779       failed = 1;
 780       break;
 781     }
 782   }
 783   if (sg_network_crosstraffic == 1) {
 784     routing_get_route_and_latency(dst, src, &back_route, NULL);
 785     xbt_dynar_foreach(back_route, i, link) {
 786       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 787         failed = 1;
 788         break;
 789       }
 790     }
 791   }
 792
 793   action =
 794       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 795                       surf_network_model, failed);
 796 #ifdef HAVE_LATENCY_BOUND_TRACKING
 797   action->latency_limited = 0;
 798 #endif
 799   action->weight = action->latency = latency;
 800
 801   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 802   action->rate = rate;
 803   if (network_update_mechanism == UM_LAZY) {
 804     GENERIC_LMM_ACTION(action).index_heap = -1;
 805     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 806   }
 807
 808   bandwidth_bound = -1.0;
 809   if (sg_weight_S_parameter > 0) {
 810     xbt_dynar_foreach(route, i, link) {
 811       action->weight +=
 812           sg_weight_S_parameter /
 813           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 814     }
 815   }
 816   xbt_dynar_foreach(route, i, link) {
 817     double bb = bandwidth_factor_callback(size) *
 818         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 819     bandwidth_bound =
 820         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 821   }
 822
 823   action->lat_current = action->latency;
 824   action->latency *= latency_factor_callback(size);
 825   action->rate =
 826       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 827   if (gap_append) {
 828     xbt_assert(!xbt_dynar_is_empty(route),
 829                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 830
 831     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 832     gap_append(size, link, action);
 833     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 834               action, src->name, dst->name, action->sender.gap,
 835               action->latency);
 836   }
 837
 838   constraints_per_variable = xbt_dynar_length(route);
 839   if (back_route != NULL)
 840     constraints_per_variable += xbt_dynar_length(back_route);
 841
 842   if (action->latency > 0) {
 843     GENERIC_LMM_ACTION(action).variable =
 844         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 845                          constraints_per_variable);
 846     if (network_update_mechanism == UM_LAZY) {
 847       // add to the heap the event when the latency is payed
 848       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 849                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 850       surf_action_lmm_heap_insert(net_action_heap,(surf_action_lmm_t)action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 851                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 852     }
 853   } else
 854     GENERIC_LMM_ACTION(action).variable =
 855         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 856                          constraints_per_variable);
 857
 858   if (action->rate < 0) {
 859     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 860                               (action->lat_current > 0) ?
 861                               sg_tcp_gamma / (2.0 *
 862                                               action->lat_current) : -1.0);
 863   } else {
 864     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 865                               (action->lat_current > 0) ?
 866                               min(action->rate,
 867                                   sg_tcp_gamma / (2.0 *
 868                                                   action->lat_current))
 869                               : action->rate);
 870   }
 871
 872   xbt_dynar_foreach(route, i, link) {
 873     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 874                GENERIC_LMM_ACTION(action).variable, 1.0);
 875   }
 876
 877   if (sg_network_crosstraffic == 1) {
 878     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 879     xbt_dynar_foreach(back_route, i, link) {
 880       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 881                  GENERIC_LMM_ACTION(action).variable, .05);
 882     }
 883   }
 884
 885   xbt_dynar_free(&route);
 886   XBT_OUT();
 887
 888   return (surf_action_t) action;
 889 }
 890
 891 static xbt_dynar_t net_get_route(void *src, void *dst)
 892 {
 893   xbt_dynar_t route = NULL;
 894   routing_get_route_and_latency(src, dst, &route, NULL);
 895   return route;
 896 }
 897
 898 static double net_get_link_bandwidth(const void *link)
 899 {
 900   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 901   return lmm->power.peak * lmm->power.scale;
 902 }
 903
 904 static double net_get_link_latency(const void *link)
 905 {
 906   return ((link_CM02_t) link)->lat_current;
 907 }
 908
 909 static int net_link_shared(const void *link)
 910 {
 911   return
 912       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 913 }
 914
 915 static void net_action_suspend(surf_action_t action)
 916 {
 917   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 918   lmm_update_variable_weight(network_maxmin_system,
 919                              ((surf_action_network_CM02_t)
 920                               action)->generic_lmm_action.variable, 0.0);
 921
 922   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 923     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 924 }
 925
 926 static void net_action_resume(surf_action_t action)
 927 {
 928   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 929     lmm_update_variable_weight(network_maxmin_system,
 930                                ((surf_action_network_CM02_t)
 931                                 action)->generic_lmm_action.variable,
 932                                ((surf_action_network_CM02_t)
 933                                 action)->weight);
 934     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 935     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 936       surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 937   }
 938 }
 939
 940 static int net_action_is_suspended(surf_action_t action)
 941 {
 942   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 943 }
 944
 945 void net_action_set_max_duration(surf_action_t action, double duration)
 946 {
 947   action->max_duration = duration;
 948   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 949     surf_action_lmm_heap_remove(net_action_heap,(surf_action_lmm_t)action);
 950 }
 951
 952 #ifdef HAVE_TRACING
 953 static void net_action_set_category(surf_action_t action,
 954                                     const char *category)
 955 {
 956   action->category = xbt_strdup(category);
 957 }
 958 #endif
 959
 960 static void net_finalize(void)
 961 {
 962   surf_model_exit(surf_network_model);
 963   surf_network_model = NULL;
 964
 965   lmm_system_free(network_maxmin_system);
 966   network_maxmin_system = NULL;
 967
 968   if (network_update_mechanism == UM_LAZY) {
 969     xbt_heap_free(net_action_heap);
 970     xbt_swag_free(net_modified_set);
 971   }
 972
 973   if (smpi_bw_factor)
 974     xbt_dynar_free(&smpi_bw_factor);
 975   if (smpi_lat_factor)
 976     xbt_dynar_free(&smpi_lat_factor);
 977 }
 978
 979 static void smpi_gap_append(double size, const link_CM02_t link,
 980                             surf_action_network_CM02_t action)
 981 {
 982   const char *src = link->lmm_resource.generic_resource.name;
 983   xbt_fifo_t fifo;
 984   surf_action_network_CM02_t last_action;
 985   double bw;
 986
 987   if (sg_sender_gap > 0.0) {
 988     if (!gap_lookup) {
 989       gap_lookup = xbt_dict_new();
 990     }
 991     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
 992     action->sender.gap = 0.0;
 993     if (fifo && xbt_fifo_size(fifo) > 0) {
 994       /* Compute gap from last send */
 995       last_action =
 996           (surf_action_network_CM02_t)
 997           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
 998       bw = net_get_link_bandwidth(link);
 999       action->sender.gap =
1000           last_action->sender.gap + max(sg_sender_gap,
1001                                         last_action->sender.size / bw);
1002       action->latency += action->sender.gap;
1003     }
1004     /* Append action as last send */
1005     action->sender.link_name = link->lmm_resource.generic_resource.name;
1006     fifo =
1007         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1008                                           action->sender.link_name);
1009     if (!fifo) {
1010       fifo = xbt_fifo_new();
1011       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1012     }
1013     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1014     action->sender.size = size;
1015   }
1016 }
1017
1018 static void smpi_gap_remove(surf_action_network_CM02_t action)
1019 {
1020   xbt_fifo_t fifo;
1021   size_t size;
1022
1023   if (sg_sender_gap > 0.0 && action->sender.link_name
1024       && action->sender.fifo_item) {
1025     fifo =
1026         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1027                                           action->sender.link_name);
1028     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1029     size = xbt_fifo_size(fifo);
1030     if (size == 0) {
1031       xbt_fifo_free(fifo);
1032       xbt_dict_remove(gap_lookup, action->sender.link_name);
1033       size = xbt_dict_length(gap_lookup);
1034       if (size == 0) {
1035         xbt_dict_free(&gap_lookup);
1036       }
1037     }
1038   }
1039 }
1040
1041 static void surf_network_model_init_internal(void)
1042 {
1043   s_surf_action_network_CM02_t comm;
1044   surf_network_model = surf_model_init();
1045
1046   surf_network_model->name = "network";
1047   surf_network_model->action_unref = net_action_unref;
1048   surf_network_model->action_cancel = net_action_cancel;
1049   surf_network_model->action_recycle = net_action_recycle;
1050   surf_network_model->get_remains = net_action_get_remains;
1051 #ifdef HAVE_LATENCY_BOUND_TRACKING
1052   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1053 #endif
1054 #ifdef HAVE_TRACING
1055   surf_network_model->set_category = net_action_set_category;
1056 #endif
1057
1058   surf_network_model->model_private->resource_used = net_resource_used;
1059   if (network_update_mechanism == UM_LAZY) {
1060     surf_network_model->model_private->share_resources =
1061         net_share_resources_lazy;
1062     surf_network_model->model_private->update_actions_state =
1063         net_update_actions_state_lazy;
1064   } else if (network_update_mechanism == UM_FULL) {
1065     surf_network_model->model_private->share_resources =
1066         net_share_resources_full;
1067     surf_network_model->model_private->update_actions_state =
1068         net_update_actions_state_full;
1069   }
1070
1071   surf_network_model->model_private->update_resource_state =
1072       net_update_resource_state;
1073   surf_network_model->model_private->finalize = net_finalize;
1074
1075   surf_network_model->suspend = net_action_suspend;
1076   surf_network_model->resume = net_action_resume;
1077   surf_network_model->is_suspended = net_action_is_suspended;
1078   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1079
1080   surf_network_model->extension.network.communicate = net_communicate;
1081   surf_network_model->extension.network.get_route = net_get_route;
1082   surf_network_model->extension.network.get_link_bandwidth =
1083       net_get_link_bandwidth;
1084   surf_network_model->extension.network.get_link_latency =
1085       net_get_link_latency;
1086   surf_network_model->extension.network.link_shared = net_link_shared;
1087   surf_network_model->extension.network.add_traces = net_add_traces;
1088   surf_network_model->extension.network.create_resource =
1089       net_create_resource;
1090
1091   if (!network_maxmin_system)
1092     network_maxmin_system = lmm_system_new(net_selective_update);
1093
1094   routing_model_create(net_create_resource("__loopback__",
1095                                            498000000, NULL, 0.000015, NULL,
1096                                            SURF_RESOURCE_ON, NULL,
1097                                            SURF_LINK_FATPIPE, NULL));
1098
1099   if (network_update_mechanism == UM_LAZY) {
1100     net_action_heap = xbt_heap_new(8, NULL);
1101     xbt_heap_set_update_callback(net_action_heap,
1102                                  surf_action_lmm_update_index_heap);
1103     net_modified_set =
1104         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1105     network_maxmin_system->keep_track = net_modified_set;
1106   }
1107 }
1108
1109 static void set_update_mechanism(void)
1110 {
1111   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1112   int select =
1113       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1114
1115   if (!strcmp(optim, "Full")) {
1116     network_update_mechanism = UM_FULL;
1117     net_selective_update = select;
1118   } else if (!strcmp(optim, "Lazy")) {
1119     network_update_mechanism = UM_LAZY;
1120     net_selective_update = 1;
1121     xbt_assert((select == 1)
1122                ||
1123                (xbt_cfg_is_default_value
1124                 (_surf_cfg_set, "network/maxmin_selective_update")),
1125                "Disabling selective update while using the lazy update mechanism is dumb!");
1126   } else {
1127     xbt_die("Unsupported optimization (%s) for this model", optim);
1128   }
1129 }
1130
1131 /************************************************************************/
1132 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1133 /************************************************************************/
1134 /* @Inproceedings{smpi_ipdps, */
1135 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1136 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1137 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1138 /*  address={Anchorage (Alaska) USA}, */
1139 /*  month=may, */
1140 /*  year={2011} */
1141 /*  } */
1142 void surf_network_model_init_SMPI(void)
1143 {
1144
1145   if (surf_network_model)
1146     return;
1147   set_update_mechanism();
1148
1149   surf_network_model_init_internal();
1150   latency_factor_callback = &smpi_latency_factor;
1151   bandwidth_factor_callback = &smpi_bandwidth_factor;
1152   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1153   gap_append = &smpi_gap_append;
1154   gap_remove = &smpi_gap_remove;
1155   net_define_callbacks();
1156   xbt_dynar_push(model_list, &surf_network_model);
1157   network_solve = lmm_solve;
1158
1159   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1160   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1161 }
1162
1163 /************************************************************************/
1164 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1165 /************************************************************************/
1166 /* @techreport{VELHO:2011:HAL-00646896:1, */
1167 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1168 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1169 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1170 /*      type = {Rapport de recherche}, */
1171 /*      institution = {INRIA}, */
1172 /*      number = {RR-7821}, */
1173 /*      year = {2011}, */
1174 /*      month = Nov, */
1175 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1176 /*  } */
1177 void surf_network_model_init_LegrandVelho(void)
1178 {
1179   if (surf_network_model)
1180     return;
1181
1182   set_update_mechanism();
1183
1184   surf_network_model_init_internal();
1185   net_define_callbacks();
1186   xbt_dynar_push(model_list, &surf_network_model);
1187   network_solve = lmm_solve;
1188
1189   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1190                             13.01);
1191   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1192                             0.97);
1193   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1194 }
1195
1196 /***************************************************************************/
1197 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1198 /***************************************************************************/
1199 /* @TechReport{      rr-lip2002-40, */
1200 /*   author        = {Henri Casanova and Loris Marchal}, */
1201 /*   institution   = {LIP}, */
1202 /*   title         = {A Network Model for Simulation of Grid Application}, */
1203 /*   number        = {2002-40}, */
1204 /*   month         = {oct}, */
1205 /*   year          = {2002} */
1206 /* } */
1207 void surf_network_model_init_CM02(void)
1208 {
1209
1210   if (surf_network_model)
1211     return;
1212
1213   set_update_mechanism();
1214   surf_network_model_init_internal();
1215   net_define_callbacks();
1216   xbt_dynar_push(model_list, &surf_network_model);
1217   network_solve = lmm_solve;
1218
1219   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1220   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1221                             1.0);
1222   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1223 }
1224
1225 /***************************************************************************/
1226 /* The models from Steven H. Low                                           */
1227 /***************************************************************************/
1228 /* @article{Low03,                                                         */
1229 /*   author={Steven H. Low},                                               */
1230 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1231 /*   year={2003},                                                          */
1232 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1233 /*    volume={11}, number={4},                                             */
1234 /*  }                                                                      */
1235 void surf_network_model_init_Reno(void)
1236 {
1237   if (surf_network_model)
1238     return;
1239
1240   set_update_mechanism();
1241   surf_network_model_init_internal();
1242   net_define_callbacks();
1243
1244   xbt_dynar_push(model_list, &surf_network_model);
1245   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1246                                     func_reno_fpi);
1247   network_solve = lagrange_solve;
1248
1249   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1250   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1251                             0.92);
1252   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1253 }
1254
1255
1256 void surf_network_model_init_Reno2(void)
1257 {
1258   if (surf_network_model)
1259     return;
1260
1261   set_update_mechanism();
1262   surf_network_model_init_internal();
1263   net_define_callbacks();
1264
1265   xbt_dynar_push(model_list, &surf_network_model);
1266   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1267                                     func_reno2_fpi);
1268   network_solve = lagrange_solve;
1269
1270   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1271   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1272                             0.92);
1273   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1274                             8775);
1275 }
1276
1277 void surf_network_model_init_Vegas(void)
1278 {
1279   if (surf_network_model)
1280     return;
1281
1282   set_update_mechanism();
1283   surf_network_model_init_internal();
1284   net_define_callbacks();
1285
1286   xbt_dynar_push(model_list, &surf_network_model);
1287   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1288                                     func_vegas_fpi);
1289   network_solve = lagrange_solve;
1290
1291   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1292   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1293                             0.92);
1294   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1295 }