src/surf/network.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "network_private.h"
  16 #include "xbt/log.h"
  17 #include "xbt/str.h"
  18
  19 #include "surf_private.h"
  20 #include "xbt/dict.h"
  21 #include "maxmin_private.h"
  22 #include "surf/surfxml_parse_values.h"
  23 #include "surf/surf_resource.h"
  24 #include "surf/surf_resource_lmm.h"
  25
  26 #undef GENERIC_LMM_ACTION
  27 #undef GENERIC_ACTION
  28 #define GENERIC_LMM_ACTION(action) (action)->generic_lmm_action
  29 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  30
  31
  32 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  33                                 "Logging specific to the SURF network module");
  34
  35 surf_model_t surf_network_model = NULL;
  36 static lmm_system_t network_maxmin_system = NULL;
  37 static void (*network_solve) (lmm_system_t) = NULL;
  38
  39 xbt_dynar_t smpi_bw_factor = NULL;
  40 xbt_dynar_t smpi_lat_factor = NULL;
  41
  42 typedef struct s_smpi_factor *smpi_factor_t;
  43 typedef struct s_smpi_factor {
  44   long factor;
  45   double value;
  46 } s_smpi_factor_t;
  47
  48 double sg_sender_gap = 0.0;
  49 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  50 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  51 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  52
  53 double sg_tcp_gamma = 0.0;
  54 int sg_network_crosstraffic = 0;
  55
  56 xbt_dict_t gap_lookup = NULL;
  57
  58 e_UM_t network_update_mechanism = UM_UNDEFINED;
  59 static int net_selective_update = 0;
  60
  61 static int net_action_is_suspended(surf_action_t action);
  62 static void update_action_remaining_lazy(double now);
  63
  64 static xbt_swag_t net_modified_set = NULL;
  65 static xbt_heap_t net_action_heap = NULL;
  66
  67 /* added to manage the communication action's heap */
  68 static void net_action_update_index_heap(void *action, int i)
  69 {
  70   surf_action_network_CM02_t a = action;
  71   GENERIC_LMM_ACTION(a).index_heap = i;
  72 }
  73
  74 /* insert action on heap using a given key and a hat (heap_action_type)
  75  * a hat can be of three types for communications:
  76  *
  77  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  78  * LATENCY = this is a heap entry to warn us when the latency is payed
  79  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  80  */
  81 static void heap_insert(surf_action_network_CM02_t action, double key,
  82                         enum heap_action_type hat)
  83 {
  84   GENERIC_LMM_ACTION(action).hat = hat;
  85   xbt_heap_push(net_action_heap, action, key);
  86 }
  87
  88 static void heap_remove(surf_action_network_CM02_t action)
  89 {
  90   GENERIC_LMM_ACTION(action).hat = NOTSET;
  91   if (GENERIC_LMM_ACTION(action).index_heap >= 0) {
  92     xbt_heap_remove(net_action_heap, GENERIC_LMM_ACTION(action).index_heap);
  93   }
  94 }
  95
  96 /******************************************************************************/
  97 /*                           Factors callbacks                                */
  98 /******************************************************************************/
  99 static double constant_latency_factor(double size)
 100 {
 101   return sg_latency_factor;
 102 }
 103
 104 static double constant_bandwidth_factor(double size)
 105 {
 106   return sg_bandwidth_factor;
 107 }
 108
 109 static double constant_bandwidth_constraint(double rate, double bound,
 110                                             double size)
 111 {
 112   return rate;
 113 }
 114
 115 /**********************/
 116 /*   SMPI callbacks   */
 117 /**********************/
 118 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 119 {
 120   char *value = NULL;
 121   unsigned int iter = 0;
 122   s_smpi_factor_t fact;
 123   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 124
 125   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 126   radical_elements = xbt_str_split(smpi_coef_string, ";");
 127   xbt_dynar_foreach(radical_elements, iter, value) {
 128
 129     radical_elements2 = xbt_str_split(value, ":");
 130     if (xbt_dynar_length(radical_elements2) != 2)
 131       xbt_die("Malformed radical for smpi factor!");
 132     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 133     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 134     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 135     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 136     xbt_dynar_free(&radical_elements2);
 137   }
 138   xbt_dynar_free(&radical_elements);
 139   return smpi_factor;
 140 }
 141
 142 static double smpi_bandwidth_factor(double size)
 143 {
 144   if (!smpi_bw_factor)
 145     smpi_bw_factor =
 146         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 147
 148   unsigned int iter = 0;
 149   s_smpi_factor_t fact;
 150   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 151     if (size >= fact.factor) {
 152       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 153       return fact.value;
 154     }
 155   }
 156
 157   return 1.0;
 158 }
 159
 160 static double smpi_latency_factor(double size)
 161 {
 162   if (!smpi_lat_factor)
 163     smpi_lat_factor =
 164         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 165
 166   unsigned int iter = 0;
 167   s_smpi_factor_t fact;
 168   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 169     if (size >= fact.factor) {
 170       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 171       return fact.value;
 172     }
 173   }
 174
 175   return 1.0;
 176 }
 177
 178 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 179
 180 static double smpi_bandwidth_constraint(double rate, double bound,
 181                                         double size)
 182 {
 183   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 184 }
 185
 186 static double (*latency_factor_callback) (double) =
 187     &constant_latency_factor;
 188 static double (*bandwidth_factor_callback) (double) =
 189     &constant_bandwidth_factor;
 190 static double (*bandwidth_constraint_callback) (double, double, double) =
 191     &constant_bandwidth_constraint;
 192
 193 static void (*gap_append) (double, const link_CM02_t,
 194                            surf_action_network_CM02_t) = NULL;
 195 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 196
 197 static void *net_create_resource(const char *name,
 198                                  double bw_initial,
 199                                  tmgr_trace_t bw_trace,
 200                                  double lat_initial,
 201                                  tmgr_trace_t lat_trace,
 202                                  e_surf_resource_state_t
 203                                  state_initial,
 204                                  tmgr_trace_t state_trace,
 205                                  e_surf_link_sharing_policy_t
 206                                  policy, xbt_dict_t properties)
 207 {
 208   link_CM02_t nw_link = (link_CM02_t)
 209       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 210                             surf_network_model, name, properties,
 211                             network_maxmin_system,
 212                             sg_bandwidth_factor * bw_initial,
 213                             history,
 214                             state_initial, state_trace,
 215                             bw_initial, bw_trace);
 216
 217   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 218              "Link '%s' declared several times in the platform file.",
 219              name);
 220
 221   nw_link->lat_current = lat_initial;
 222   if (lat_trace)
 223     nw_link->lat_event =
 224         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 225
 226   if (policy == SURF_LINK_FATPIPE)
 227     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 228
 229   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 230
 231   return nw_link;
 232 }
 233
 234 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 235 {
 236   if (link->policy == SURF_LINK_FULLDUPLEX) {
 237     char *link_id;
 238     link_id = bprintf("%s_UP", link->id);
 239     net_create_resource(link_id,
 240                         link->bandwidth,
 241                         link->bandwidth_trace,
 242                         link->latency,
 243                         link->latency_trace,
 244                         link->state,
 245                         link->state_trace, link->policy, link->properties);
 246     xbt_free(link_id);
 247     link_id = bprintf("%s_DOWN", link->id);
 248     net_create_resource(link_id,
 249                         link->bandwidth,
 250                         link->bandwidth_trace,
 251                         link->latency,
 252                         link->latency_trace,
 253                         link->state,
 254                         link->state_trace, link->policy, link->properties);
 255     xbt_free(link_id);
 256   } else {
 257     net_create_resource(link->id,
 258                         link->bandwidth,
 259                         link->bandwidth_trace,
 260                         link->latency,
 261                         link->latency_trace,
 262                         link->state,
 263                         link->state_trace, link->policy, link->properties);
 264   }
 265 }
 266
 267 static void net_add_traces(void)
 268 {
 269   xbt_dict_cursor_t cursor = NULL;
 270   char *trace_name, *elm;
 271
 272   static int called = 0;
 273   if (called)
 274     return;
 275   called = 1;
 276
 277   /* connect all traces relative to network */
 278   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 279     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 280     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 281
 282     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 283                trace_name, elm);
 284     xbt_assert(trace,
 285                "Cannot connect trace %s to link %s: trace undefined",
 286                trace_name, elm);
 287
 288     link->lmm_resource.state_event =
 289         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 290   }
 291
 292   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 293     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 294     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 295
 296     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 297                trace_name, elm);
 298     xbt_assert(trace,
 299                "Cannot connect trace %s to link %s: trace undefined",
 300                trace_name, elm);
 301
 302     link->lmm_resource.power.event =
 303         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 304   }
 305
 306   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 307     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 308     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 309
 310     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 311                trace_name, elm);
 312     xbt_assert(trace,
 313                "Cannot connect trace %s to link %s: trace undefined",
 314                trace_name, elm);
 315
 316     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 317   }
 318 }
 319
 320 static void net_define_callbacks(void)
 321 {
 322   /* Figuring out the network links */
 323   sg_platf_link_add_cb(net_parse_link_init);
 324   sg_platf_postparse_add_cb(net_add_traces);
 325 }
 326
 327 static int net_resource_used(void *resource_id)
 328 {
 329   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 330                                                      resource_id)->
 331                              constraint);
 332 }
 333
 334 static int net_action_unref(surf_action_t action)
 335 {
 336   action->refcount--;
 337   if (!action->refcount) {
 338     xbt_swag_remove(action, action->state_set);
 339     if (((surf_action_lmm_t)action)->variable) {
 340       lmm_variable_free(network_maxmin_system,
 341                         ((surf_action_lmm_t) action)->variable);
 342     }
 343     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 344       heap_remove((surf_action_network_CM02_t) action);
 345       xbt_swag_remove(action, net_modified_set);
 346     }
 347 #ifdef HAVE_TRACING
 348     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 349     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 350     xbt_free(action->category);
 351 #endif
 352     surf_action_free(&action);
 353     return 1;
 354   }
 355   return 0;
 356 }
 357
 358
 359
 360 static void net_action_cancel(surf_action_t action)
 361 {
 362   XBT_DEBUG("cancel action %p", action);
 363   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 364   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 365     xbt_swag_remove(action, net_modified_set);
 366     heap_remove((surf_action_network_CM02_t) action);
 367   }
 368 }
 369
 370 void net_action_recycle(surf_action_t action)
 371 {
 372   return;
 373 }
 374
 375 #ifdef HAVE_LATENCY_BOUND_TRACKING
 376 int net_get_link_latency_limited(surf_action_t action)
 377 {
 378   return action->latency_limited;
 379 }
 380 #endif
 381
 382 double net_action_get_remains(surf_action_t action)
 383 {
 384   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 385     update_action_remaining_lazy(surf_get_clock());
 386   return action->remains;
 387 }
 388
 389 static void update_action_remaining_lazy(double now)
 390 {
 391   surf_action_network_CM02_t action = NULL;
 392   double delta = 0.0;
 393
 394   xbt_swag_foreach(action, net_modified_set) {
 395
 396     if (GENERIC_LMM_ACTION(action).suspended != 0) {
 397       continue;
 398     }
 399
 400     delta = now - GENERIC_LMM_ACTION(action).last_update;
 401
 402     double_update(&(((surf_action_t)action)->remains),
 403                   lmm_variable_getvalue(((surf_action_lmm_t) action)->variable) * delta);
 404
 405     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 406       double_update(&(((surf_action_t)action)->max_duration), delta);
 407
 408     if ((((surf_action_t)action)->remains <= 0) &&
 409         (lmm_get_variable_weight(((surf_action_lmm_t)action)->variable) > 0)) {
 410       ((surf_action_t)action)->finish = surf_get_clock();
 411       surf_network_model->action_state_set((surf_action_t) action,
 412                                            SURF_ACTION_DONE);
 413       heap_remove(action);
 414     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 415                && (((surf_action_t)action)->max_duration <= 0))) {
 416       ((surf_action_t)action)->finish = surf_get_clock();
 417       surf_network_model->action_state_set((surf_action_t) action,
 418                                            SURF_ACTION_DONE);
 419       heap_remove(action);
 420     }
 421
 422     GENERIC_LMM_ACTION(action).last_update = now;
 423   }
 424 }
 425
 426 static double net_share_resources_full(double now)
 427 {
 428   s_surf_action_lmm_t s_action;
 429   surf_action_network_CM02_t action = NULL;
 430   xbt_swag_t running_actions =
 431       surf_network_model->states.running_action_set;
 432   double min;
 433
 434   min = generic_maxmin_share_resources(running_actions,
 435                                        xbt_swag_offset(s_action,
 436                                                        variable),
 437                                        network_maxmin_system,
 438                                        network_solve);
 439
 440 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 441
 442   xbt_swag_foreach(action, running_actions) {
 443 #ifdef HAVE_LATENCY_BOUND_TRACKING
 444     if (lmm_is_variable_limited_by_latency(action->variable)) {
 445       GENERIC_LMM_ACTION(action).latency_limited = 1;
 446     } else {
 447       GENERIC_LMM_ACTION(action).latency_limited = 0;
 448     }
 449 #endif
 450     if (action->latency > 0) {
 451       min = (min < 0) ? action->latency : min(min, action->latency);
 452     }
 453   }
 454
 455   XBT_DEBUG("Min of share resources %f", min);
 456
 457   return min;
 458 }
 459
 460 static double net_share_resources_lazy(double now)
 461 {
 462   surf_action_network_CM02_t action = NULL;
 463   double min = -1;
 464   double value;
 465
 466   XBT_DEBUG
 467       ("Before share resources, the size of modified actions set is %d",
 468        xbt_swag_size(net_modified_set));
 469   update_action_remaining_lazy(now);
 470
 471   lmm_solve(network_maxmin_system);
 472
 473   XBT_DEBUG
 474       ("After share resources, The size of modified actions set is %d",
 475        xbt_swag_size(net_modified_set));
 476
 477   xbt_swag_foreach(action, net_modified_set) {
 478     int max_dur_flag = 0;
 479
 480     if (GENERIC_ACTION(action).state_set !=
 481         surf_network_model->states.running_action_set)
 482       continue;
 483
 484     /* bogus priority, skip it */
 485     if (GENERIC_ACTION(action).priority <= 0)
 486       continue;
 487
 488     min = -1;
 489     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 490     if (value > 0) {
 491       if (GENERIC_ACTION(action).remains > 0) {
 492         value = GENERIC_ACTION(action).remains / value;
 493         min = now + value;
 494       } else {
 495         value = 0.0;
 496         min = now;
 497       }
 498     }
 499
 500     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 501         && (min == -1
 502             || GENERIC_ACTION(action).start +
 503             GENERIC_ACTION(action).max_duration < min)) {
 504       min = GENERIC_ACTION(action).start +
 505           GENERIC_ACTION(action).max_duration;
 506       max_dur_flag = 1;
 507     }
 508
 509     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 510               GENERIC_ACTION(action).start, now + value,
 511               GENERIC_ACTION(action).max_duration);
 512
 513     if (min != -1) {
 514       heap_remove(action);
 515       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 516       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 517                 now);
 518     } else DIE_IMPOSSIBLE;
 519   }
 520
 521   //hereafter must have already the min value for this resource model
 522   if (xbt_heap_size(net_action_heap) > 0)
 523     min = xbt_heap_maxkey(net_action_heap) - now;
 524   else
 525     min = -1;
 526
 527   XBT_DEBUG("The minimum with the HEAP %lf", min);
 528
 529   return min;
 530 }
 531
 532 static void net_update_actions_state_full(double now, double delta)
 533 {
 534   double deltap = 0.0;
 535   surf_action_network_CM02_t action = NULL;
 536   surf_action_network_CM02_t next_action = NULL;
 537   xbt_swag_t running_actions =
 538       surf_network_model->states.running_action_set;
 539   /*
 540      xbt_swag_t failed_actions =
 541      surf_network_model->states.failed_action_set;
 542    */
 543
 544   xbt_swag_foreach_safe(action, next_action, running_actions) {
 545     deltap = delta;
 546     if (action->latency > 0) {
 547       if (action->latency > deltap) {
 548         double_update(&(action->latency), deltap);
 549         deltap = 0.0;
 550       } else {
 551         double_update(&(deltap), action->latency);
 552         action->latency = 0.0;
 553       }
 554       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 555         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 556                                    action->weight);
 557     }
 558 #ifdef HAVE_TRACING
 559     if (TRACE_is_enabled()) {
 560       xbt_dynar_t route = NULL;
 561       routing_get_route_and_latency(action->src_name, action->dst_name,
 562                                     &route, NULL);
 563       link_CM02_t link;
 564       unsigned int i;
 565       xbt_dynar_foreach(route, i, link) {
 566         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 567                                         ((surf_action_t)action)->category,
 568                                         lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable),
 569                                         now - delta,
 570                                         delta);
 571       }
 572     }
 573 #endif
 574     if (!lmm_get_number_of_cnst_from_var
 575         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 576       /* There is actually no link used, hence an infinite bandwidth.
 577        * This happens often when using models like vivaldi.
 578        * In such case, just make sure that the action completes immediately.
 579        */
 580       double_update(&(GENERIC_ACTION(action).remains),
 581                     GENERIC_ACTION(action).remains);
 582     }
 583     double_update(&(GENERIC_ACTION(action).remains),
 584                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 585     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 586       double_update(&(((surf_action_t)action)->max_duration), delta);
 587
 588     if ((GENERIC_ACTION(action).remains <= 0) &&
 589         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 590       ((surf_action_t)action)->finish = surf_get_clock();
 591       surf_network_model->action_state_set((surf_action_t) action,
 592                                            SURF_ACTION_DONE);
 593
 594       if (gap_remove)
 595         gap_remove(action);
 596     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 597                && (((surf_action_t)action)->max_duration <= 0)) {
 598       ((surf_action_t)action)->finish = surf_get_clock();
 599       surf_network_model->action_state_set((surf_action_t) action,
 600                                            SURF_ACTION_DONE);
 601       if (gap_remove)
 602         gap_remove(action);
 603     }
 604   }
 605
 606   return;
 607 }
 608
 609 static void net_update_actions_state_lazy(double now, double delta)
 610 {
 611   surf_action_network_CM02_t action = NULL;
 612
 613   while ((xbt_heap_size(net_action_heap) > 0)
 614          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 615     action = xbt_heap_pop(net_action_heap);
 616     XBT_DEBUG("Action %p: finish", action);
 617     GENERIC_ACTION(action).finish = surf_get_clock();
 618
 619     // if I am wearing a latency hat
 620     if (GENERIC_LMM_ACTION(action).hat == LATENCY) {
 621       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 622                                  action->weight);
 623       heap_remove(action);
 624       GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 625
 626       // if I am wearing a max_duration or normal hat
 627     } else if (GENERIC_LMM_ACTION(action).hat == MAX_DURATION ||
 628         GENERIC_LMM_ACTION(action).hat == NORMAL) {
 629       // no need to communicate anymore
 630       // assume that flows that reached max_duration have remaining of 0
 631       GENERIC_ACTION(action).remains = 0;
 632       ((surf_action_t)action)->finish = surf_get_clock();
 633       surf_network_model->action_state_set((surf_action_t) action,
 634                                            SURF_ACTION_DONE);
 635       heap_remove(action);
 636     }
 637   }
 638   return;
 639 }
 640
 641 static void net_update_resource_state(void *id,
 642                                       tmgr_trace_event_t event_type,
 643                                       double value, double date)
 644 {
 645   link_CM02_t nw_link = id;
 646   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 647   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 648   /*     value, event_type); */
 649
 650   if (event_type == nw_link->lmm_resource.power.event) {
 651     double delta =
 652         sg_weight_S_parameter / value - sg_weight_S_parameter /
 653         (nw_link->lmm_resource.power.peak *
 654          nw_link->lmm_resource.power.scale);
 655     lmm_variable_t var = NULL;
 656     lmm_element_t elem = NULL;
 657     surf_action_network_CM02_t action = NULL;
 658
 659     nw_link->lmm_resource.power.peak = value;
 660     lmm_update_constraint_bound(network_maxmin_system,
 661                                 nw_link->lmm_resource.constraint,
 662                                 sg_bandwidth_factor *
 663                                 (nw_link->lmm_resource.power.peak *
 664                                  nw_link->lmm_resource.power.scale));
 665 #ifdef HAVE_TRACING
 666     TRACE_surf_link_set_bandwidth(date,
 667                                   (char
 668                                    *) (((nw_link->lmm_resource).
 669                                         generic_resource).name),
 670                                   sg_bandwidth_factor *
 671                                   (nw_link->lmm_resource.power.peak *
 672                                    nw_link->lmm_resource.power.scale));
 673 #endif
 674     if (sg_weight_S_parameter > 0) {
 675       while ((var = lmm_get_var_from_cnst
 676               (network_maxmin_system, nw_link->lmm_resource.constraint,
 677                &elem))) {
 678         action = lmm_variable_id(var);
 679         action->weight += delta;
 680         if (!(GENERIC_LMM_ACTION(action).suspended))
 681           lmm_update_variable_weight(network_maxmin_system,
 682                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 683       }
 684     }
 685     if (tmgr_trace_event_free(event_type))
 686       nw_link->lmm_resource.power.event = NULL;
 687   } else if (event_type == nw_link->lat_event) {
 688     double delta = value - nw_link->lat_current;
 689     lmm_variable_t var = NULL;
 690     lmm_element_t elem = NULL;
 691     surf_action_network_CM02_t action = NULL;
 692
 693     nw_link->lat_current = value;
 694     while ((var = lmm_get_var_from_cnst
 695             (network_maxmin_system, nw_link->lmm_resource.constraint,
 696              &elem))) {
 697       action = lmm_variable_id(var);
 698       action->lat_current += delta;
 699       action->weight += delta;
 700       if (action->rate < 0)
 701         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 702                                   sg_tcp_gamma / (2.0 *
 703                                                   action->lat_current));
 704       else {
 705         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 706                                   min(action->rate,
 707                                       sg_tcp_gamma / (2.0 *
 708                                                       action->
 709                                                       lat_current)));
 710
 711         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 712           XBT_INFO("Flow is limited BYBANDWIDTH");
 713         } else {
 714           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 715                    action->lat_current);
 716         }
 717       }
 718       if (!(GENERIC_LMM_ACTION(action).suspended))
 719         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 720                                    action->weight);
 721
 722     }
 723     if (tmgr_trace_event_free(event_type))
 724       nw_link->lat_event = NULL;
 725   } else if (event_type == nw_link->lmm_resource.state_event) {
 726     if (value > 0)
 727       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 728     else {
 729       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 730       lmm_variable_t var = NULL;
 731       lmm_element_t elem = NULL;
 732
 733       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 734       while ((var = lmm_get_var_from_cnst
 735               (network_maxmin_system, cnst, &elem))) {
 736         surf_action_t action = lmm_variable_id(var);
 737
 738         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 739             surf_action_state_get(action) == SURF_ACTION_READY) {
 740           action->finish = date;
 741           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 742         }
 743       }
 744     }
 745     if (tmgr_trace_event_free(event_type))
 746       nw_link->lmm_resource.state_event = NULL;
 747   } else {
 748     XBT_CRITICAL("Unknown event ! \n");
 749     xbt_abort();
 750   }
 751
 752   XBT_DEBUG
 753       ("There were a resource state event, need to update actions related to the constraint (%p)",
 754        nw_link->lmm_resource.constraint);
 755   return;
 756 }
 757
 758
 759 static surf_action_t net_communicate(const char *src_name,
 760                                      const char *dst_name, double size,
 761                                      double rate)
 762 {
 763   unsigned int i;
 764   link_CM02_t link;
 765   int failed = 0;
 766   surf_action_network_CM02_t action = NULL;
 767   double bandwidth_bound;
 768   double latency = 0.0;
 769   xbt_dynar_t back_route = NULL;
 770   int constraints_per_variable = 0;
 771
 772   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 773
 774   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 775
 776   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 777   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 778              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 779              src_name, dst_name);
 780
 781   xbt_dynar_foreach(route, i, link) {
 782     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 783       failed = 1;
 784       break;
 785     }
 786   }
 787   if (sg_network_crosstraffic == 1) {
 788     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 789     xbt_dynar_foreach(back_route, i, link) {
 790       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 791         failed = 1;
 792         break;
 793       }
 794     }
 795   }
 796
 797   action =
 798       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 799                       surf_network_model, failed);
 800 #ifdef HAVE_LATENCY_BOUND_TRACKING
 801   (GENERIC_LMM_ACTION(action)).latency_limited = 0;
 802 #endif
 803   action->weight = action->latency = latency;
 804
 805   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 806   action->rate = rate;
 807   if (network_update_mechanism == UM_LAZY) {
 808     GENERIC_LMM_ACTION(action).index_heap = -1;
 809     GENERIC_LMM_ACTION(action).last_update = surf_get_clock();
 810   }
 811
 812   bandwidth_bound = -1.0;
 813   if (sg_weight_S_parameter > 0) {
 814     xbt_dynar_foreach(route, i, link) {
 815       action->weight +=
 816           sg_weight_S_parameter /
 817           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 818     }
 819   }
 820   xbt_dynar_foreach(route, i, link) {
 821     double bb = bandwidth_factor_callback(size) *
 822         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 823     bandwidth_bound =
 824         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 825   }
 826
 827   action->lat_current = action->latency;
 828   action->latency *= latency_factor_callback(size);
 829   action->rate =
 830       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 831   if (gap_append) {
 832     xbt_assert(!xbt_dynar_is_empty(route),
 833                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 834
 835     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 836     gap_append(size, link, action);
 837     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 838               action, src_name, dst_name, action->sender.gap,
 839               action->latency);
 840   }
 841
 842   constraints_per_variable = xbt_dynar_length(route);
 843   if (back_route != NULL)
 844     constraints_per_variable += xbt_dynar_length(back_route);
 845
 846   if (action->latency > 0) {
 847     GENERIC_LMM_ACTION(action).variable =
 848         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 849                          constraints_per_variable);
 850     if (network_update_mechanism == UM_LAZY) {
 851       // add to the heap the event when the latency is payed
 852       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 853                 action->latency + GENERIC_LMM_ACTION(action).last_update);
 854       heap_insert(action, action->latency + GENERIC_LMM_ACTION(action).last_update,
 855                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 856     }
 857   } else
 858     GENERIC_LMM_ACTION(action).variable =
 859         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 860                          constraints_per_variable);
 861
 862   if (action->rate < 0) {
 863     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 864                               (action->lat_current > 0) ?
 865                               sg_tcp_gamma / (2.0 *
 866                                               action->lat_current) : -1.0);
 867   } else {
 868     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 869                               (action->lat_current > 0) ?
 870                               min(action->rate,
 871                                   sg_tcp_gamma / (2.0 *
 872                                                   action->lat_current))
 873                               : action->rate);
 874   }
 875
 876   xbt_dynar_foreach(route, i, link) {
 877     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 878                GENERIC_LMM_ACTION(action).variable, 1.0);
 879   }
 880
 881   if (sg_network_crosstraffic == 1) {
 882     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 883     xbt_dynar_foreach(back_route, i, link) {
 884       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 885                  GENERIC_LMM_ACTION(action).variable, .05);
 886     }
 887   }
 888 #ifdef HAVE_TRACING
 889   if (TRACE_is_enabled()) {
 890     action->src_name = xbt_strdup(src_name);
 891     action->dst_name = xbt_strdup(dst_name);
 892   } else {
 893     action->src_name = action->dst_name = NULL;
 894   }
 895 #endif
 896
 897   xbt_dynar_free(&route);
 898   XBT_OUT();
 899
 900   return (surf_action_t) action;
 901 }
 902
 903 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 904 {
 905   xbt_dynar_t route = NULL;
 906   routing_get_route_and_latency(src, dst, &route, NULL);
 907   return route;
 908 }
 909
 910 static double net_get_link_bandwidth(const void *link)
 911 {
 912   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 913   return lmm->power.peak * lmm->power.scale;
 914 }
 915
 916 static double net_get_link_latency(const void *link)
 917 {
 918   return ((link_CM02_t) link)->lat_current;
 919 }
 920
 921 static int net_link_shared(const void *link)
 922 {
 923   return
 924       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 925 }
 926
 927 static void net_action_suspend(surf_action_t action)
 928 {
 929   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 930   lmm_update_variable_weight(network_maxmin_system,
 931                              ((surf_action_network_CM02_t)
 932                               action)->generic_lmm_action.variable, 0.0);
 933
 934   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 935     heap_remove((surf_action_network_CM02_t) action);
 936 }
 937
 938 static void net_action_resume(surf_action_t action)
 939 {
 940   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 941     lmm_update_variable_weight(network_maxmin_system,
 942                                ((surf_action_network_CM02_t)
 943                                 action)->generic_lmm_action.variable,
 944                                ((surf_action_network_CM02_t)
 945                                 action)->weight);
 946     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 947     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 948       heap_remove((surf_action_network_CM02_t) action);
 949   }
 950 }
 951
 952 static int net_action_is_suspended(surf_action_t action)
 953 {
 954   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 955 }
 956
 957 void net_action_set_max_duration(surf_action_t action, double duration)
 958 {
 959   action->max_duration = duration;
 960   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 961     heap_remove((surf_action_network_CM02_t) action);
 962 }
 963
 964 #ifdef HAVE_TRACING
 965 static void net_action_set_category(surf_action_t action,
 966                                     const char *category)
 967 {
 968   action->category = xbt_strdup(category);
 969 }
 970 #endif
 971
 972 static void net_finalize(void)
 973 {
 974   surf_model_exit(surf_network_model);
 975   surf_network_model = NULL;
 976
 977   lmm_system_free(network_maxmin_system);
 978   network_maxmin_system = NULL;
 979
 980   if (network_update_mechanism == UM_LAZY) {
 981     xbt_heap_free(net_action_heap);
 982     xbt_swag_free(net_modified_set);
 983   }
 984
 985   if (smpi_bw_factor)
 986     xbt_dynar_free(&smpi_bw_factor);
 987   if (smpi_lat_factor)
 988     xbt_dynar_free(&smpi_lat_factor);
 989 }
 990
 991 static void smpi_gap_append(double size, const link_CM02_t link,
 992                             surf_action_network_CM02_t action)
 993 {
 994   const char *src = link->lmm_resource.generic_resource.name;
 995   xbt_fifo_t fifo;
 996   surf_action_network_CM02_t last_action;
 997   double bw;
 998
 999   if (sg_sender_gap > 0.0) {
1000     if (!gap_lookup) {
1001       gap_lookup = xbt_dict_new();
1002     }
1003     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1004     action->sender.gap = 0.0;
1005     if (fifo && xbt_fifo_size(fifo) > 0) {
1006       /* Compute gap from last send */
1007       last_action =
1008           (surf_action_network_CM02_t)
1009           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1010       bw = net_get_link_bandwidth(link);
1011       action->sender.gap =
1012           last_action->sender.gap + max(sg_sender_gap,
1013                                         last_action->sender.size / bw);
1014       action->latency += action->sender.gap;
1015     }
1016     /* Append action as last send */
1017     action->sender.link_name = link->lmm_resource.generic_resource.name;
1018     fifo =
1019         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1020                                           action->sender.link_name);
1021     if (!fifo) {
1022       fifo = xbt_fifo_new();
1023       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1024     }
1025     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1026     action->sender.size = size;
1027   }
1028 }
1029
1030 static void smpi_gap_remove(surf_action_network_CM02_t action)
1031 {
1032   xbt_fifo_t fifo;
1033   size_t size;
1034
1035   if (sg_sender_gap > 0.0 && action->sender.link_name
1036       && action->sender.fifo_item) {
1037     fifo =
1038         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1039                                           action->sender.link_name);
1040     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1041     size = xbt_fifo_size(fifo);
1042     if (size == 0) {
1043       xbt_fifo_free(fifo);
1044       xbt_dict_remove(gap_lookup, action->sender.link_name);
1045       size = xbt_dict_length(gap_lookup);
1046       if (size == 0) {
1047         xbt_dict_free(&gap_lookup);
1048       }
1049     }
1050   }
1051 }
1052
1053 static void surf_network_model_init_internal(void)
1054 {
1055   s_surf_action_network_CM02_t comm;
1056   surf_network_model = surf_model_init();
1057
1058   surf_network_model->name = "network";
1059   surf_network_model->action_unref = net_action_unref;
1060   surf_network_model->action_cancel = net_action_cancel;
1061   surf_network_model->action_recycle = net_action_recycle;
1062   surf_network_model->get_remains = net_action_get_remains;
1063 #ifdef HAVE_LATENCY_BOUND_TRACKING
1064   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1065 #endif
1066 #ifdef HAVE_TRACING
1067   surf_network_model->set_category = net_action_set_category;
1068 #endif
1069
1070   surf_network_model->model_private->resource_used = net_resource_used;
1071   if (network_update_mechanism == UM_LAZY) {
1072     surf_network_model->model_private->share_resources =
1073         net_share_resources_lazy;
1074     surf_network_model->model_private->update_actions_state =
1075         net_update_actions_state_lazy;
1076   } else if (network_update_mechanism == UM_FULL) {
1077     surf_network_model->model_private->share_resources =
1078         net_share_resources_full;
1079     surf_network_model->model_private->update_actions_state =
1080         net_update_actions_state_full;
1081   }
1082
1083   surf_network_model->model_private->update_resource_state =
1084       net_update_resource_state;
1085   surf_network_model->model_private->finalize = net_finalize;
1086
1087   surf_network_model->suspend = net_action_suspend;
1088   surf_network_model->resume = net_action_resume;
1089   surf_network_model->is_suspended = net_action_is_suspended;
1090   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1091
1092   surf_network_model->extension.network.communicate = net_communicate;
1093   surf_network_model->extension.network.get_route = net_get_route;
1094   surf_network_model->extension.network.get_link_bandwidth =
1095       net_get_link_bandwidth;
1096   surf_network_model->extension.network.get_link_latency =
1097       net_get_link_latency;
1098   surf_network_model->extension.network.link_shared = net_link_shared;
1099   surf_network_model->extension.network.add_traces = net_add_traces;
1100   surf_network_model->extension.network.create_resource =
1101       net_create_resource;
1102
1103   if (!network_maxmin_system)
1104     network_maxmin_system = lmm_system_new(net_selective_update);
1105
1106   routing_model_create(sizeof(link_CM02_t),
1107                        net_create_resource("__loopback__",
1108                                            498000000, NULL, 0.000015, NULL,
1109                                            SURF_RESOURCE_ON, NULL,
1110                                            SURF_LINK_FATPIPE, NULL));
1111
1112   if (network_update_mechanism == UM_LAZY) {
1113     net_action_heap = xbt_heap_new(8, NULL);
1114     xbt_heap_set_update_callback(net_action_heap,
1115                                  net_action_update_index_heap);
1116     net_modified_set =
1117         xbt_swag_new(xbt_swag_offset(comm, generic_lmm_action.action_list_hookup));
1118     network_maxmin_system->keep_track = net_modified_set;
1119   }
1120 }
1121
1122 static void set_update_mechanism(void)
1123 {
1124 #ifdef HAVE_TRACING
1125   TRACE_set_network_update_mechanism();
1126 #endif
1127
1128   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1129   int select =
1130       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1131
1132   if (!strcmp(optim, "Full")) {
1133     network_update_mechanism = UM_FULL;
1134     net_selective_update = select;
1135   } else if (!strcmp(optim, "Lazy")) {
1136     network_update_mechanism = UM_LAZY;
1137     net_selective_update = 1;
1138     xbt_assert((select == 1)
1139                ||
1140                (xbt_cfg_is_default_value
1141                 (_surf_cfg_set, "network/maxmin_selective_update")),
1142                "Disabling selective update while using the lazy update mechanism is dumb!");
1143   } else {
1144     xbt_die("Unsupported optimization (%s) for this model", optim);
1145   }
1146 }
1147
1148 /************************************************************************/
1149 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1150 /************************************************************************/
1151 /* @Inproceedings{smpi_ipdps, */
1152 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1153 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1154 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1155 /*  address={Anchorage (Alaska) USA}, */
1156 /*  month=may, */
1157 /*  year={2011} */
1158 /*  } */
1159 void surf_network_model_init_SMPI(void)
1160 {
1161
1162   if (surf_network_model)
1163     return;
1164   set_update_mechanism();
1165
1166   surf_network_model_init_internal();
1167   latency_factor_callback = &smpi_latency_factor;
1168   bandwidth_factor_callback = &smpi_bandwidth_factor;
1169   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1170   gap_append = &smpi_gap_append;
1171   gap_remove = &smpi_gap_remove;
1172   net_define_callbacks();
1173   xbt_dynar_push(model_list, &surf_network_model);
1174   network_solve = lmm_solve;
1175
1176   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1177   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1178 }
1179
1180 /************************************************************************/
1181 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1182 /************************************************************************/
1183 /* @techreport{VELHO:2011:HAL-00646896:1, */
1184 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1185 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1186 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1187 /*      type = {Rapport de recherche}, */
1188 /*      institution = {INRIA}, */
1189 /*      number = {RR-7821}, */
1190 /*      year = {2011}, */
1191 /*      month = Nov, */
1192 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1193 /*  } */
1194 void surf_network_model_init_LegrandVelho(void)
1195 {
1196   if (surf_network_model)
1197     return;
1198
1199   set_update_mechanism();
1200
1201   surf_network_model_init_internal();
1202   net_define_callbacks();
1203   xbt_dynar_push(model_list, &surf_network_model);
1204   network_solve = lmm_solve;
1205
1206   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1207                             13.01);
1208   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1209                             0.97);
1210   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1211 }
1212
1213 /***************************************************************************/
1214 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1215 /***************************************************************************/
1216 /* @TechReport{      rr-lip2002-40, */
1217 /*   author        = {Henri Casanova and Loris Marchal}, */
1218 /*   institution   = {LIP}, */
1219 /*   title         = {A Network Model for Simulation of Grid Application}, */
1220 /*   number        = {2002-40}, */
1221 /*   month         = {oct}, */
1222 /*   year          = {2002} */
1223 /* } */
1224 void surf_network_model_init_CM02(void)
1225 {
1226
1227   if (surf_network_model)
1228     return;
1229
1230   set_update_mechanism();
1231   surf_network_model_init_internal();
1232   net_define_callbacks();
1233   xbt_dynar_push(model_list, &surf_network_model);
1234   network_solve = lmm_solve;
1235
1236   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1237   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1238                             1.0);
1239   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1240 }
1241
1242 /***************************************************************************/
1243 /* The models from Steven H. Low                                           */
1244 /***************************************************************************/
1245 /* @article{Low03,                                                         */
1246 /*   author={Steven H. Low},                                               */
1247 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1248 /*   year={2003},                                                          */
1249 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1250 /*    volume={11}, number={4},                                             */
1251 /*  }                                                                      */
1252 void surf_network_model_init_Reno(void)
1253 {
1254   if (surf_network_model)
1255     return;
1256
1257   set_update_mechanism();
1258   surf_network_model_init_internal();
1259   net_define_callbacks();
1260
1261   xbt_dynar_push(model_list, &surf_network_model);
1262   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1263                                     func_reno_fpi);
1264   network_solve = lagrange_solve;
1265
1266   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1267   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1268                             0.92);
1269   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1270 }
1271
1272
1273 void surf_network_model_init_Reno2(void)
1274 {
1275   if (surf_network_model)
1276     return;
1277
1278   set_update_mechanism();
1279   surf_network_model_init_internal();
1280   net_define_callbacks();
1281
1282   xbt_dynar_push(model_list, &surf_network_model);
1283   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1284                                     func_reno2_fpi);
1285   network_solve = lagrange_solve;
1286
1287   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1288   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1289                             0.92);
1290   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1291                             8775);
1292 }
1293
1294 void surf_network_model_init_Vegas(void)
1295 {
1296   if (surf_network_model)
1297     return;
1298
1299   set_update_mechanism();
1300   surf_network_model_init_internal();
1301   net_define_callbacks();
1302
1303   xbt_dynar_push(model_list, &surf_network_model);
1304   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1305                                     func_vegas_fpi);
1306   network_solve = lagrange_solve;
1307
1308   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1309   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1310                             0.92);
1311   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1312 }