src/surf/network.c

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