src/surf/network_im.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
  27 #undef GENERIC_ACTION
  28 #define GENERIC_ACTION(action) action->generic_action
  29
  30
  31 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  32                                 "Logging specific to the SURF network module");
  33
  34 surf_model_t surf_network_model = NULL;
  35 static lmm_system_t network_im_maxmin_system = NULL;
  36 static void (*network_im_solve) (lmm_system_t) = NULL;
  37
  38 double sg_sender_gap = 0.0;
  39 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  40 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  41 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  42
  43 double sg_tcp_gamma = 0.0;
  44 int sg_network_crosstraffic = 0;
  45
  46 xbt_dict_t gap_lookup = NULL;
  47
  48 e_UM_t network_update_mechanism = UM_UNDEFINED;
  49 static int selective_update = 0;
  50
  51 typedef struct network_link_CM02_im {
  52   s_surf_resource_lmm_t lmm_resource;   /* must remain first to be added to a trace */
  53
  54   /* Using this object with the public part of
  55      model does not make sense */
  56   double lat_current;
  57   tmgr_trace_event_t lat_event;
  58 } s_link_CM02_im_t, *link_CM02_im_t;
  59
  60 static int im_net_action_is_suspended(surf_action_t action);
  61 static void im_net_update_actions_state(double now, double delta);
  62 static void update_action_remaining(double now);
  63
  64 static xbt_swag_t im_net_modified_set = NULL;
  65 static xbt_heap_t im_net_action_heap = NULL;
  66 xbt_swag_t keep_track = NULL;
  67 extern int sg_maxmin_selective_update;
  68
  69 #ifdef HAVE_SMPI
  70 static void gap_append(double size, const link_CM02_im_t link, surf_action_network_CM02_im_t action);
  71 static void gap_unknown(surf_action_network_CM02_im_t action);
  72 static void gap_remove(surf_action_network_CM02_im_t action);
  73 #endif
  74
  75 /* added to manage the communication action's heap */
  76 static void im_net_action_update_index_heap(void *action, int i)
  77 {
  78   ((surf_action_network_CM02_im_t) action)->index_heap = i;
  79 }
  80
  81 /* insert action on heap using a given key and a hat (heap_action_type)
  82  * a hat can be of three types for communications:
  83  *
  84  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  85  * LATENCY = this is a heap entry to warn us when the latency is payed
  86  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  87  */
  88 static void heap_insert(surf_action_network_CM02_im_t    action, double key, enum heap_action_type hat){
  89   action->hat = hat;
  90   xbt_heap_push(im_net_action_heap, action, key);
  91 }
  92
  93 static void heap_remove(surf_action_network_CM02_im_t action){
  94   action->hat = NONE;
  95   if(((surf_action_network_CM02_im_t) action)->index_heap >= 0){
  96       xbt_heap_remove(im_net_action_heap,action->index_heap);
  97   }
  98 }
  99
 100 /******************************************************************************/
 101 /*                           Factors callbacks                                */
 102 /******************************************************************************/
 103 static double im_constant_latency_factor(double size)
 104 {
 105   return sg_latency_factor;
 106 }
 107
 108 static double im_constant_bandwidth_factor(double size)
 109 {
 110   return sg_bandwidth_factor;
 111 }
 112
 113 static double im_constant_bandwidth_constraint(double rate, double bound,
 114                                             double size)
 115 {
 116   return rate;
 117 }
 118
 119
 120 /**********************/
 121 /*   SMPI callbacks   */
 122 /**********************/
 123 static double smpi_latency_factor(double size)
 124 {
 125   /* 1 B <= size <= 1 KiB */
 126   if (size <= 1024.0) {
 127     return 1.0056;
 128   }
 129
 130   /* 2 KiB <= size <= 32 KiB */
 131   if (size <= 32768.0) {
 132     return 1.8805;
 133   }
 134
 135   /* 64 KiB <= size <= 4 MiB */
 136   return 22.7111;
 137 }
 138
 139 static double smpi_bandwidth_factor(double size)
 140 {
 141   /* 1 B <= size <= 1 KiB */
 142   if (size <= 1024.0) {
 143     return 0.2758;
 144   }
 145
 146   /* 2 KiB <= size <= 32 KiB */
 147   if (size <= 32768.0) {
 148     return 0.5477;
 149   }
 150
 151   /* 64 KiB <= size <= 4 MiB */
 152   return 0.9359;
 153 }
 154
 155 static double smpi_bandwidth_constraint(double rate, double bound,
 156                                         double size)
 157 {
 158   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 159 }
 160
 161 static double (*im_latency_factor_callback) (double) =
 162     &im_constant_latency_factor;
 163 static double (*im_bandwidth_factor_callback) (double) =
 164     &im_constant_bandwidth_factor;
 165 static double (*im_bandwidth_constraint_callback) (double, double, double) =
 166     &im_constant_bandwidth_constraint;
 167
 168
 169 static void* im_net_create_resource(const char *name,
 170                                 double bw_initial,
 171                                 tmgr_trace_t bw_trace,
 172                                 double lat_initial,
 173                                 tmgr_trace_t lat_trace,
 174                                 e_surf_resource_state_t
 175                                 state_initial,
 176                                 tmgr_trace_t state_trace,
 177                                 e_surf_link_sharing_policy_t
 178                                 policy, xbt_dict_t properties)
 179 {
 180   link_CM02_im_t nw_link = (link_CM02_im_t)
 181       surf_resource_lmm_new(sizeof(s_link_CM02_im_t),
 182                             surf_network_model, name, properties,
 183                             network_im_maxmin_system,
 184                             sg_bandwidth_factor * bw_initial,
 185                             history,
 186                             state_initial, state_trace,
 187                             bw_initial, bw_trace);
 188
 189   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 190               "Link '%s' declared several times in the platform file.",
 191               name);
 192
 193   nw_link->lat_current = lat_initial;
 194   if (lat_trace)
 195     nw_link->lat_event =
 196         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 197
 198   if (policy == SURF_LINK_FATPIPE)
 199     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 200
 201   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 202
 203   return nw_link;
 204 }
 205
 206 static void im_net_parse_link_init(sg_platf_link_cbarg_t link)
 207 {
 208   if(link->policy == SURF_LINK_FULLDUPLEX){
 209     char *link_id;
 210     link_id = bprintf("%s_UP", link->id);
 211           im_net_create_resource(link_id,
 212                            link->bandwidth,
 213                            link->bandwidth_trace,
 214                            link->latency,
 215                            link->latency_trace,
 216                            link->state,
 217                            link->state_trace,
 218                            link->policy,
 219                            link->properties);
 220           xbt_free(link_id);
 221     link_id = bprintf("%s_DOWN", link->id);
 222     im_net_create_resource(link_id,
 223                         link->bandwidth,
 224                         link->bandwidth_trace,
 225                         link->latency,
 226                         link->latency_trace,
 227                         link->state,
 228                         link->state_trace,
 229                         link->policy,
 230                         link->properties);
 231     xbt_free(link_id);
 232   }
 233   else{
 234     im_net_create_resource(link->id,
 235                         link->bandwidth,
 236                         link->bandwidth_trace,
 237                         link->latency,
 238                         link->latency_trace,
 239                         link->state,
 240                         link->state_trace,
 241                         link->policy,
 242                         link->properties);
 243   }
 244 }
 245
 246 static void im_net_add_traces(void)
 247 {
 248   xbt_dict_cursor_t cursor = NULL;
 249   char *trace_name, *elm;
 250
 251   static int called = 0;
 252   if (called)
 253     return;
 254   called = 1;
 255
 256   /* connect all traces relative to network */
 257   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 258     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 259     link_CM02_im_t link =
 260                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 261
 262     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 263                 trace_name, elm);
 264     xbt_assert(trace,
 265                 "Cannot connect trace %s to link %s: trace undefined",
 266                 trace_name, elm);
 267
 268     link->lmm_resource.state_event =
 269         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 270   }
 271
 272   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 273     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 274     link_CM02_im_t link =
 275                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 276
 277     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 278                 trace_name, elm);
 279     xbt_assert(trace,
 280                 "Cannot connect trace %s to link %s: trace undefined",
 281                 trace_name, elm);
 282
 283     link->lmm_resource.power.event =
 284         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 285   }
 286
 287   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 288     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 289     link_CM02_im_t link =
 290                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 291
 292     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 293                 trace_name, elm);
 294     xbt_assert(trace,
 295                 "Cannot connect trace %s to link %s: trace undefined",
 296                 trace_name, elm);
 297
 298     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 299   }
 300 }
 301
 302 static void im_net_define_callbacks(void)
 303 {
 304   /* Figuring out the network links */
 305   sg_platf_link_add_cb(im_net_parse_link_init);
 306   sg_platf_postparse_add_cb(im_net_add_traces);
 307 }
 308
 309 static int im_net_resource_used(void *resource_id)
 310 {
 311   return lmm_constraint_used(network_im_maxmin_system,
 312                              ((surf_resource_lmm_t)
 313                               resource_id)->constraint);
 314 }
 315
 316 static int im_net_action_unref(surf_action_t action)
 317 {
 318   action->refcount--;
 319   if (!action->refcount) {
 320     xbt_swag_remove(action, action->state_set);
 321     if (((surf_action_network_CM02_im_t) action)->variable){
 322       lmm_variable_free(network_im_maxmin_system,
 323                         ((surf_action_network_CM02_im_t) action)->variable);
 324     }
 325     if(network_update_mechanism == UM_LAZY){// remove action from the heap
 326       heap_remove((surf_action_network_CM02_im_t) action);
 327       xbt_swag_remove(action, im_net_modified_set);
 328     }
 329 #ifdef HAVE_TRACING
 330     xbt_free(((surf_action_network_CM02_im_t) action)->src_name);
 331     xbt_free(((surf_action_network_CM02_im_t) action)->dst_name);
 332     xbt_free(action->category);
 333 #endif
 334     surf_action_free(&action);
 335     return 1;
 336   }
 337   return 0;
 338 }
 339
 340
 341
 342 static void im_net_action_cancel(surf_action_t action)
 343 {
 344   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 345   if(network_update_mechanism == UM_LAZY){// remove action from the heap
 346     xbt_swag_remove(action, im_net_modified_set);
 347     heap_remove((surf_action_network_CM02_im_t) action);
 348   }
 349 }
 350
 351 void im_net_action_recycle(surf_action_t action)
 352 {
 353   return;
 354 }
 355
 356 #ifdef HAVE_LATENCY_BOUND_TRACKING
 357 static int im_net_get_link_latency_limited(surf_action_t action)
 358 {
 359   return action->latency_limited;
 360 }
 361 #endif
 362
 363 double im_net_action_get_remains(surf_action_t action)
 364 {
 365   if(network_update_mechanism == UM_LAZY)/* update remains before return it */
 366     update_action_remaining(surf_get_clock());
 367   return action->remains;
 368 }
 369
 370 static void update_action_remaining(double now){
 371   surf_action_network_CM02_im_t action = NULL;
 372   double delta = 0.0;
 373
 374   xbt_swag_foreach(action, im_net_modified_set) {
 375
 376     if(action->suspended != 0){
 377         continue;
 378     }
 379
 380     delta = now - action->last_update;
 381
 382     double_update(&(action->generic_action.remains),
 383                   lmm_variable_getvalue(action->variable) * delta);
 384
 385     if (action->generic_action.max_duration != NO_MAX_DURATION)
 386       double_update(&(action->generic_action.max_duration), delta);
 387
 388     if ((action->generic_action.remains <= 0) &&
 389         (lmm_get_variable_weight(action->variable) > 0)) {
 390       action->generic_action.finish = surf_get_clock();
 391       surf_network_model->action_state_set((surf_action_t) action,
 392                                            SURF_ACTION_DONE);
 393       heap_remove(action);
 394     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 395                && (action->generic_action.max_duration <= 0)) {
 396       action->generic_action.finish = surf_get_clock();
 397       surf_network_model->action_state_set((surf_action_t) action,
 398                                            SURF_ACTION_DONE);
 399       heap_remove(action);
 400     }
 401
 402     action->last_update = now;
 403   }
 404 }
 405
 406 static double net_share_resources_full(double now)
 407 {
 408   s_surf_action_network_CM02_im_t s_action;
 409   surf_action_network_CM02_im_t action = NULL;
 410   xbt_swag_t running_actions =
 411       surf_network_model->states.running_action_set;
 412   double min;
 413
 414   min = generic_maxmin_share_resources(running_actions,
 415                                        xbt_swag_offset(s_action,
 416                                                        variable),
 417                                        network_im_maxmin_system,
 418                                        network_im_solve);
 419
 420 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 421
 422   xbt_swag_foreach(action, running_actions) {
 423 #ifdef HAVE_LATENCY_BOUND_TRACKING
 424     if (lmm_is_variable_limited_by_latency(action->variable)) {
 425       (action->generic_action).latency_limited = 1;
 426     } else {
 427       (action->generic_action).latency_limited = 0;
 428     }
 429 #endif
 430     if (action->latency > 0) {
 431       if (min < 0)
 432         min = action->latency;
 433       else if (action->latency < min)
 434         min = action->latency;
 435     }
 436   }
 437
 438   XBT_DEBUG("Min of share resources %f", min);
 439
 440   return min;
 441 }
 442
 443 static double net_share_resources_lazy(double now)
 444 {
 445   surf_action_network_CM02_im_t action = NULL;
 446   double min=-1;
 447   double value;
 448
 449   XBT_DEBUG("Before share resources, the size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 450   update_action_remaining(now);
 451
 452   keep_track = im_net_modified_set;
 453   lmm_solve(network_im_maxmin_system);
 454   keep_track = NULL;
 455
 456   XBT_DEBUG("After share resources, The size of modified actions set is %d", xbt_swag_size(im_net_modified_set));
 457
 458    xbt_swag_foreach(action, im_net_modified_set) {
 459      if (GENERIC_ACTION(action).state_set != surf_network_model->states.running_action_set){
 460        continue;
 461      }
 462
 463      /* bogus priority, skip it */
 464      if (GENERIC_ACTION(action).priority <= 0){
 465          continue;
 466      }
 467
 468      min = -1;
 469      value = lmm_variable_getvalue(action->variable);
 470      if (value > 0) {
 471          if (GENERIC_ACTION(action).remains > 0) {
 472              value = GENERIC_ACTION(action).remains / value;
 473              min = now + value;
 474          } else {
 475              value = 0.0;
 476              min = now;
 477          }
 478      }
 479
 480      if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 481          && (min == -1
 482              || GENERIC_ACTION(action).start +
 483              GENERIC_ACTION(action).max_duration < min)){
 484        min =   GENERIC_ACTION(action).start +
 485                GENERIC_ACTION(action).max_duration;
 486      }
 487
 488      XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 489                 GENERIC_ACTION(action).start, now + value,
 490                 GENERIC_ACTION(action).max_duration);
 491
 492
 493
 494      if (action->index_heap >= 0) {
 495          heap_remove((surf_action_network_CM02_im_t) action);
 496      }
 497
 498      if (min != -1) {
 499          heap_insert((surf_action_network_CM02_im_t) action, min, NORMAL);
 500          XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min, now);
 501      }
 502    }
 503
 504    //hereafter must have already the min value for this resource model
 505    if(xbt_heap_size(im_net_action_heap) > 0 ){
 506        min = xbt_heap_maxkey(im_net_action_heap) - now ;
 507    }else{
 508        min = -1;
 509    }
 510
 511    XBT_DEBUG("The minimum with the HEAP %lf", min);
 512
 513
 514   return min;
 515 }
 516
 517 static void net_update_actions_state_full(double now, double delta)
 518 {
 519   double deltap = 0.0;
 520   surf_action_network_CM02_im_t action = NULL;
 521   surf_action_network_CM02_im_t next_action = NULL;
 522   xbt_swag_t running_actions =
 523       surf_network_model->states.running_action_set;
 524   /*
 525      xbt_swag_t failed_actions =
 526      surf_network_model->states.failed_action_set;
 527    */
 528
 529   xbt_swag_foreach_safe(action, next_action, running_actions) {
 530     deltap = delta;
 531     if (action->latency > 0) {
 532       if (action->latency > deltap) {
 533         double_update(&(action->latency), deltap);
 534         deltap = 0.0;
 535       } else {
 536         double_update(&(deltap), action->latency);
 537         action->latency = 0.0;
 538       }
 539       if ((action->latency == 0.0) && !(action->suspended))
 540         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 541                                    action->weight);
 542     }
 543 #ifdef HAVE_TRACING
 544     if (TRACE_is_enabled()) {
 545       xbt_dynar_t route=NULL;
 546       routing_get_route_and_latency(action->src_name, action->dst_name,&route,NULL);
 547       link_CM02_im_t link;
 548       unsigned int i;
 549       xbt_dynar_foreach(route, i, link) {
 550         TRACE_surf_link_set_utilization(link->lmm_resource.generic_resource.name,
 551                                         action->generic_action.data,
 552                                         (surf_action_t) action,
 553                                         lmm_variable_getvalue
 554                                         (action->variable), now - delta,
 555                                         delta);
 556       }
 557     }
 558 #endif
 559     if(!lmm_get_number_of_cnst_from_var(network_im_maxmin_system, action->variable)) {
 560         /* There is actually no link used, hence an infinite bandwidth.
 561          * This happens often when using models like vivaldi.
 562          * In such case, just make sure that the action completes immediately.
 563          */
 564       double_update(&(action->generic_action.remains),
 565           action->generic_action.remains);
 566     }
 567     double_update(&(action->generic_action.remains),
 568                   lmm_variable_getvalue(action->variable) * deltap);
 569     if (action->generic_action.max_duration != NO_MAX_DURATION)
 570       double_update(&(action->generic_action.max_duration), delta);
 571
 572     if ((action->generic_action.remains <= 0) &&
 573         (lmm_get_variable_weight(action->variable) > 0)) {
 574       action->generic_action.finish = surf_get_clock();
 575       surf_network_model->action_state_set((surf_action_t) action,
 576                                            SURF_ACTION_DONE);
 577 #ifdef HAVE_SMPI
 578       gap_remove(action);
 579 #endif
 580     } else if ((action->generic_action.max_duration != NO_MAX_DURATION)
 581                && (action->generic_action.max_duration <= 0)) {
 582       action->generic_action.finish = surf_get_clock();
 583       surf_network_model->action_state_set((surf_action_t) action,
 584                                            SURF_ACTION_DONE);
 585 #ifdef HAVE_SMPI
 586       gap_remove(action);
 587 #endif
 588     }
 589   }
 590
 591   return;
 592 }
 593
 594 static void net_update_actions_state_lazy(double now, double delta)
 595 {
 596   surf_action_network_CM02_im_t action = NULL;
 597
 598   while ((xbt_heap_size(im_net_action_heap) > 0)
 599          && (double_equals(xbt_heap_maxkey(im_net_action_heap), now))) {
 600     action = xbt_heap_pop(im_net_action_heap);
 601     XBT_DEBUG("Action %p: finish", action);
 602     GENERIC_ACTION(action).finish = surf_get_clock();
 603
 604     // if I am wearing a latency heat
 605     if( action->hat ==  LATENCY){
 606         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 607                                            action->weight);
 608         heap_remove(action);
 609         action->last_update = surf_get_clock();
 610
 611         XBT_DEBUG("Action (%p) is not limited by latency anymore", action);
 612 #ifdef HAVE_LATENCY_BOUND_TRACKING
 613           GENERIC_ACTION(action).latency_limited = 0;
 614 #endif
 615
 616     // if I am wearing a max_duration or normal hat
 617     }else if( action->hat == MAX_DURATION || action->hat == NORMAL ){
 618         // no need to communicate anymore
 619         // assume that flows that reached max_duration have remaining of 0
 620         GENERIC_ACTION(action).remains = 0;
 621         action->generic_action.finish = surf_get_clock();
 622               surf_network_model->action_state_set((surf_action_t) action,
 623                                                    SURF_ACTION_DONE);
 624         heap_remove(action);
 625     }
 626   }
 627   return;
 628 }
 629
 630 static void net_update_resource_state(void *id,
 631                                       tmgr_trace_event_t event_type,
 632                                       double value, double date)
 633 {
 634   link_CM02_im_t nw_link = id;
 635   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 636   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 637   /*     value, event_type); */
 638
 639   if (event_type == nw_link->lmm_resource.power.event) {
 640     double delta =
 641         sg_weight_S_parameter / value - sg_weight_S_parameter /
 642         (nw_link->lmm_resource.power.peak *
 643          nw_link->lmm_resource.power.scale);
 644     lmm_variable_t var = NULL;
 645     lmm_element_t elem = NULL;
 646     surf_action_network_CM02_im_t action = NULL;
 647
 648     nw_link->lmm_resource.power.peak = value;
 649     lmm_update_constraint_bound(network_im_maxmin_system,
 650                                 nw_link->lmm_resource.constraint,
 651                                 sg_bandwidth_factor *
 652                                 (nw_link->lmm_resource.power.peak *
 653                                  nw_link->lmm_resource.power.scale));
 654 #ifdef HAVE_TRACING
 655     TRACE_surf_link_set_bandwidth(date, (char *)(((nw_link->lmm_resource).generic_resource).name),
 656                                   sg_bandwidth_factor *
 657                                   (nw_link->lmm_resource.power.peak *
 658                                    nw_link->lmm_resource.power.scale));
 659 #endif
 660     if (sg_weight_S_parameter > 0) {
 661       while ((var = lmm_get_var_from_cnst
 662               (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 663                &elem))) {
 664         action = lmm_variable_id(var);
 665         action->weight += delta;
 666         if (!(action->suspended))
 667           lmm_update_variable_weight(network_im_maxmin_system,
 668                                      action->variable, action->weight);
 669       }
 670     }
 671     if (tmgr_trace_event_free(event_type))
 672       nw_link->lmm_resource.power.event = NULL;
 673   } else if (event_type == nw_link->lat_event) {
 674     double delta = value - nw_link->lat_current;
 675     lmm_variable_t var = NULL;
 676     lmm_element_t elem = NULL;
 677     surf_action_network_CM02_im_t action = NULL;
 678
 679     nw_link->lat_current = value;
 680     while ((var = lmm_get_var_from_cnst
 681             (network_im_maxmin_system, nw_link->lmm_resource.constraint,
 682              &elem))) {
 683       action = lmm_variable_id(var);
 684       action->lat_current += delta;
 685       action->weight += delta;
 686       if (action->rate < 0)
 687         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 688                                   sg_tcp_gamma / (2.0 *
 689                                                   action->lat_current));
 690       else {
 691         lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 692                                   min(action->rate,
 693                                       sg_tcp_gamma / (2.0 *
 694                                                       action->lat_current)));
 695
 696         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 697           XBT_INFO("Flow is limited BYBANDWIDTH");
 698         } else {
 699           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 700                 action->lat_current);
 701         }
 702       }
 703       if (!(action->suspended))
 704         lmm_update_variable_weight(network_im_maxmin_system, action->variable,
 705                                    action->weight);
 706
 707     }
 708     if (tmgr_trace_event_free(event_type))
 709       nw_link->lat_event = NULL;
 710   } else if (event_type == nw_link->lmm_resource.state_event) {
 711     if (value > 0)
 712       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 713     else {
 714       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 715       lmm_variable_t var = NULL;
 716       lmm_element_t elem = NULL;
 717
 718       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 719       while ((var = lmm_get_var_from_cnst
 720               (network_im_maxmin_system, cnst, &elem))) {
 721         surf_action_t action = lmm_variable_id(var);
 722
 723         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 724             surf_action_state_get(action) == SURF_ACTION_READY) {
 725           action->finish = date;
 726           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 727         }
 728       }
 729     }
 730     if (tmgr_trace_event_free(event_type))
 731       nw_link->lmm_resource.state_event = NULL;
 732   } else {
 733     XBT_CRITICAL("Unknown event ! \n");
 734     xbt_abort();
 735   }
 736
 737   XBT_DEBUG("There were a resource state event, need to update actions related to the constraint (%p)", nw_link->lmm_resource.constraint);
 738   return;
 739 }
 740
 741
 742 static surf_action_t im_net_communicate(const char *src_name,
 743                                      const char *dst_name, double size,
 744                                      double rate)
 745 {
 746   unsigned int i;
 747   link_CM02_im_t link;
 748   int failed = 0;
 749   surf_action_network_CM02_im_t action = NULL;
 750   double bandwidth_bound;
 751   double latency=0.0;
 752   /* LARGE PLATFORMS HACK:
 753      Add a link_CM02_im_t *link and a int link_nb to network_card_CM02_im_t. It will represent local links for this node
 754      Use the cluster_id for ->id */
 755
 756   xbt_dynar_t back_route = NULL;
 757   int constraints_per_variable = 0;
 758   // I need to have the forward and backward routes at the same time, so allocate "route". That way, the routing wont clean it up
 759   xbt_dynar_t route=xbt_dynar_new(global_routing->size_of_link,NULL);
 760   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 761
 762   if (sg_network_crosstraffic == 1) {
 763     // FIXME: fill route directly (unclear: check with blame who put the FIXME)
 764     routing_get_route_and_latency(dst_name, src_name, &back_route,NULL);
 765   }
 766
 767   /* LARGE PLATFORMS HACK:
 768      total_route_size = route_size + src->link_nb + dst->nb */
 769
 770   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 771   /* LARGE PLATFORMS HACK:
 772      assert on total_route_size */
 773   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 774               "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 775               src_name, dst_name);
 776
 777   xbt_dynar_foreach(route, i, link) {
 778     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 779       failed = 1;
 780       break;
 781     }
 782   }
 783   if (sg_network_crosstraffic == 1) {
 784     xbt_dynar_foreach(back_route, i, link) {
 785       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 786         failed = 1;
 787         break;
 788       }
 789     }
 790   }
 791
 792   action =
 793       surf_action_new(sizeof(s_surf_action_network_CM02_im_t), size,
 794                       surf_network_model, failed);
 795 #ifdef HAVE_LATENCY_BOUND_TRACKING
 796   (action->generic_action).latency_limited = 0;
 797 #endif
 798   action->weight = action->latency = latency;
 799
 800   xbt_swag_insert(action, action->generic_action.state_set);
 801   action->rate = rate;
 802   if(network_update_mechanism == UM_LAZY){
 803     action->index_heap = -1;
 804     action->latency = 0.0;
 805     action->weight = 0.0;
 806     action->last_update = surf_get_clock();
 807   }
 808
 809   bandwidth_bound = -1.0;
 810   xbt_dynar_foreach(route, i, link) {
 811     action->weight +=
 812         sg_weight_S_parameter /
 813         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 814     if (bandwidth_bound < 0.0)
 815       bandwidth_bound =
 816           im_bandwidth_factor_callback(size) *
 817           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 818     else
 819       bandwidth_bound =
 820           min(bandwidth_bound,
 821               im_bandwidth_factor_callback(size) *
 822               (link->lmm_resource.power.peak *
 823                link->lmm_resource.power.scale));
 824   }
 825   /* LARGE PLATFORMS HACK:
 826      Add src->link and dst->link latencies */
 827   action->lat_current = action->latency;
 828   action->latency *= im_latency_factor_callback(size);
 829   action->rate =
 830       im_bandwidth_constraint_callback(action->rate, bandwidth_bound,
 831                                         size);
 832 #ifdef HAVE_SMPI
 833   if(!xbt_dynar_is_empty(route)) {
 834     link = *(link_CM02_im_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, action->latency);
 838   } else {
 839     gap_unknown(action);
 840   }
 841 #endif
 842
 843   /* LARGE PLATFORMS HACK:
 844      lmm_variable_new(..., total_route_size) */
 845   if (back_route != NULL) {
 846     constraints_per_variable =
 847         xbt_dynar_length(route) + xbt_dynar_length(back_route);
 848   } else {
 849     constraints_per_variable = xbt_dynar_length(route);
 850   }
 851
 852   if (action->latency > 0){
 853       action->variable =
 854         lmm_variable_new(network_im_maxmin_system, action, 0.0, -1.0,
 855                          constraints_per_variable);
 856     if(network_update_mechanism == UM_LAZY){
 857       // add to the heap the event when the latency is payed
 858       XBT_DEBUG("Added action (%p) one latency event at date %f", action, action->latency + action->last_update);
 859       heap_insert(action, action->latency + action->last_update, LATENCY);
 860     }
 861 #ifdef HAVE_LATENCY_BOUND_TRACKING
 862         (action->generic_action).latency_limited = 1;
 863 #endif
 864   }
 865   else
 866     action->variable =
 867         lmm_variable_new(network_im_maxmin_system, action, 1.0, -1.0,
 868                          constraints_per_variable);
 869
 870   if (action->rate < 0) {
 871     if (action->lat_current > 0)
 872       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 873                                 sg_tcp_gamma / (2.0 *
 874                                                 action->lat_current));
 875     else
 876       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 877                                 -1.0);
 878   } else {
 879     if (action->lat_current > 0)
 880       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 881                                 min(action->rate,
 882                                     sg_tcp_gamma / (2.0 *
 883                                                     action->lat_current)));
 884     else
 885       lmm_update_variable_bound(network_im_maxmin_system, action->variable,
 886                                 action->rate);
 887   }
 888
 889   xbt_dynar_foreach(route, i, link) {
 890     lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 891                action->variable, 1.0);
 892   }
 893
 894   if (sg_network_crosstraffic == 1) {
 895     XBT_DEBUG("Fullduplex active adding backward flow using 5%c", '%');
 896     xbt_dynar_foreach(back_route, i, link) {
 897       lmm_expand(network_im_maxmin_system, link->lmm_resource.constraint,
 898                  action->variable, .05);
 899     }
 900   }
 901
 902   /* LARGE PLATFORMS HACK:
 903      expand also with src->link and dst->link */
 904 #ifdef HAVE_TRACING
 905   if (TRACE_is_enabled()) {
 906     action->src_name = xbt_strdup(src_name);
 907     action->dst_name = xbt_strdup(dst_name);
 908   } else {
 909     action->src_name = action->dst_name = NULL;
 910   }
 911 #endif
 912
 913   xbt_dynar_free(&route);
 914   XBT_OUT();
 915
 916   return (surf_action_t) action;
 917 }
 918
 919 static xbt_dynar_t im_net_get_route(const char *src, const char *dst)
 920 {
 921   xbt_dynar_t route=NULL;
 922   routing_get_route_and_latency(src, dst,&route,NULL);
 923   return route;
 924 }
 925
 926 static double im_net_get_link_bandwidth(const void *link)
 927 {
 928   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 929   return lmm->power.peak * lmm->power.scale;
 930 }
 931
 932 static double im_net_get_link_latency(const void *link)
 933 {
 934   return ((link_CM02_im_t) link)->lat_current;
 935 }
 936
 937 static int im_net_link_shared(const void *link)
 938 {
 939   return
 940       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 941 }
 942
 943 static void im_net_action_suspend(surf_action_t action)
 944 {
 945   ((surf_action_network_CM02_im_t) action)->suspended = 1;
 946   lmm_update_variable_weight(network_im_maxmin_system,
 947                              ((surf_action_network_CM02_im_t)
 948                               action)->variable, 0.0);
 949
 950   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 951     heap_remove((surf_action_network_CM02_im_t) action);
 952 }
 953
 954 static void im_net_action_resume(surf_action_t action)
 955 {
 956   if (((surf_action_network_CM02_im_t) action)->suspended) {
 957     lmm_update_variable_weight(network_im_maxmin_system,
 958                                ((surf_action_network_CM02_im_t)
 959                                 action)->variable,
 960                                ((surf_action_network_CM02_im_t)
 961                                 action)->weight);
 962     ((surf_action_network_CM02_im_t) action)->suspended = 0;
 963     if(network_update_mechanism == UM_LAZY)// remove action from the heap
 964       heap_remove((surf_action_network_CM02_im_t) action);
 965   }
 966 }
 967
 968 static int im_net_action_is_suspended(surf_action_t action)
 969 {
 970   return ((surf_action_network_CM02_im_t) action)->suspended;
 971 }
 972
 973 void im_net_action_set_max_duration(surf_action_t action, double duration)
 974 {
 975   action->max_duration = duration;
 976   if(network_update_mechanism == UM_LAZY)// remove action from the heap
 977     heap_remove((surf_action_network_CM02_im_t) action);
 978 }
 979
 980 #ifdef HAVE_TRACING
 981 static void net_action_set_category(surf_action_t action, const char *category)
 982 {
 983   action->category = xbt_strdup (category);
 984 }
 985 #endif
 986
 987 static void im_net_finalize(void)
 988 {
 989   surf_model_exit(surf_network_model);
 990   surf_network_model = NULL;
 991
 992   lmm_system_free(network_im_maxmin_system);
 993   network_im_maxmin_system = NULL;
 994
 995   if(network_update_mechanism == UM_LAZY){
 996     xbt_heap_free(im_net_action_heap);
 997     xbt_swag_free(im_net_modified_set);
 998   }
 999 }
1000
1001 #ifdef HAVE_SMPI
1002 static void gap_append(double size, const link_CM02_im_t link, surf_action_network_CM02_im_t action) {
1003    const char* src = link->lmm_resource.generic_resource.name;
1004    xbt_fifo_t fifo;
1005    surf_action_network_CM02_im_t last_action;
1006    double bw;
1007
1008    if(sg_sender_gap > 0.0) {
1009       if(!gap_lookup) {
1010          gap_lookup = xbt_dict_new();
1011       }
1012       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, src);
1013       action->sender.gap = 0.0;
1014       if(fifo && xbt_fifo_size(fifo) > 0) {
1015          /* Compute gap from last send */
1016          last_action = (surf_action_network_CM02_im_t)xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1017          bw = im_net_get_link_bandwidth(link);
1018          action->sender.gap = last_action->sender.gap + max(sg_sender_gap, last_action->sender.size / bw);
1019          action->latency += action->sender.gap;
1020       }
1021       /* Append action as last send */
1022       action->sender.link_name = link->lmm_resource.generic_resource.name;
1023       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1024       if(!fifo) {
1025          fifo = xbt_fifo_new();
1026          xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1027       }
1028       action->sender.fifo_item = xbt_fifo_push(fifo, action);
1029       action->sender.size = size;
1030    }
1031 }
1032
1033 static void gap_unknown(surf_action_network_CM02_im_t action) {
1034    action->sender.gap = 0.0;
1035    action->sender.link_name = NULL;
1036    action->sender.fifo_item = NULL;
1037    action->sender.size = 0.0;
1038 }
1039
1040 static void gap_remove(surf_action_network_CM02_im_t action) {
1041    xbt_fifo_t fifo;
1042    size_t size;
1043
1044    if(sg_sender_gap > 0.0 && action->sender.link_name && action->sender.fifo_item) {
1045       fifo = (xbt_fifo_t)xbt_dict_get_or_null(gap_lookup, action->sender.link_name);
1046       xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1047       size = xbt_fifo_size(fifo);
1048       if(size == 0) {
1049          xbt_fifo_free(fifo);
1050          xbt_dict_remove(gap_lookup, action->sender.link_name);
1051          size = xbt_dict_length(gap_lookup);
1052          if(size == 0) {
1053             xbt_dict_free(&gap_lookup);
1054          }
1055       }
1056    }
1057 }
1058 #endif
1059
1060 static void im_surf_network_model_init_internal(void)
1061 {
1062   s_surf_action_network_CM02_im_t comm;
1063   surf_network_model = surf_model_init();
1064
1065   surf_network_model->name = "network";
1066   surf_network_model->action_unref = im_net_action_unref;
1067   surf_network_model->action_cancel = im_net_action_cancel;
1068   surf_network_model->action_recycle = im_net_action_recycle;
1069   surf_network_model->get_remains = im_net_action_get_remains;
1070 #ifdef HAVE_LATENCY_BOUND_TRACKING
1071   surf_network_model->get_latency_limited = im_net_get_link_latency_limited;
1072 #endif
1073
1074   surf_network_model->model_private->resource_used = im_net_resource_used;
1075   if(network_update_mechanism == UM_LAZY) {
1076     surf_network_model->model_private->share_resources = net_share_resources_lazy;
1077     surf_network_model->model_private->update_actions_state = net_update_actions_state_lazy;
1078   } else if(network_update_mechanism == UM_FULL) {
1079     surf_network_model->model_private->share_resources = net_share_resources_full;
1080     surf_network_model->model_private->update_actions_state = 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 = im_net_finalize;
1086
1087   surf_network_model->suspend = im_net_action_suspend;
1088   surf_network_model->resume = im_net_action_resume;
1089   surf_network_model->is_suspended = im_net_action_is_suspended;
1090   surf_cpu_model->set_max_duration = im_net_action_set_max_duration;
1091
1092   surf_network_model->extension.network.communicate = im_net_communicate;
1093   surf_network_model->extension.network.get_route = im_net_get_route;
1094   surf_network_model->extension.network.get_link_bandwidth =
1095                   im_net_get_link_bandwidth;
1096   surf_network_model->extension.network.get_link_latency =
1097                   im_net_get_link_latency;
1098   surf_network_model->extension.network.link_shared = im_net_link_shared;
1099   surf_network_model->extension.network.add_traces = im_net_add_traces;
1100   surf_network_model->extension.network.create_resource =
1101                   im_net_create_resource;
1102
1103  if (!network_im_maxmin_system)
1104     network_im_maxmin_system = lmm_system_new(selective_update);
1105
1106  routing_model_create(sizeof(link_CM02_im_t),
1107       im_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     im_net_action_heap = xbt_heap_new(8,NULL);
1114     xbt_heap_set_update_callback(im_net_action_heap, im_net_action_update_index_heap);
1115     im_net_modified_set =
1116         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1117   }
1118 }
1119
1120 static void set_update_mechanism(void) {
1121   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1122   int select = xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1123
1124   if(!strcmp(optim,"Full")) {
1125     network_update_mechanism = UM_FULL;
1126     selective_update = select;
1127   } else if (!strcmp(optim,"Lazy")) {
1128     network_update_mechanism = UM_LAZY;
1129     selective_update = 1;
1130     xbt_assert((select==1) || (xbt_cfg_is_default_value(_surf_cfg_set,"network/maxmin_selective_update")),
1131         "Disabling selective update while using the lazy update mechanism is dumb!");
1132   } else {
1133     xbt_die("Unsupported optimization (%s) for this model",optim);
1134   }
1135 }
1136
1137 /************************************************************************/
1138 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1139 /************************************************************************/
1140 /* @Inproceedings{smpi_ipdps, */
1141 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1142 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1143 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1144 /*  address={Anchorage (Alaska) USA}, */
1145 /*  month=may, */
1146 /*  year={2011} */
1147 /*  } */
1148 void surf_network_model_init_SMPI(void)
1149 {
1150
1151   if (surf_network_model)
1152     return;
1153   set_update_mechanism();
1154
1155   im_surf_network_model_init_internal();
1156   im_latency_factor_callback = &smpi_latency_factor;
1157   im_bandwidth_factor_callback = &smpi_bandwidth_factor;
1158   im_bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1159   im_net_define_callbacks();
1160   xbt_dynar_push(model_list, &surf_network_model);
1161   network_im_solve = lmm_solve;
1162
1163   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1164   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1165 }
1166
1167 /************************************************************************/
1168 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1169 /************************************************************************/
1170 /* @techreport{VELHO:2011:HAL-00646896:1, */
1171 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1172 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1173 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1174 /*      type = {Rapport de recherche}, */
1175 /*      institution = {INRIA}, */
1176 /*      number = {RR-7821}, */
1177 /*      year = {2011}, */
1178 /*      month = Nov, */
1179 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1180 /*  } */
1181 void im_surf_network_model_init_LegrandVelho(void)
1182 {
1183   char *model = xbt_cfg_get_string(_surf_cfg_set, "network/model");
1184
1185   if (surf_network_model)
1186     return;
1187
1188   if(!strcmp(model,"LV08_fullupdate")) {
1189     XBT_WARN("[*Deprecated*. Use --cfg=network/model:LV08 with option --cfg=network/optim:Full instead.]");
1190   }
1191   set_update_mechanism();
1192
1193   im_surf_network_model_init_internal();
1194   im_net_define_callbacks();
1195   xbt_dynar_push(model_list, &surf_network_model);
1196   network_im_solve = lmm_solve;
1197
1198   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4); // 13.01 when callibration is done without phase effects
1199   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",0.92);// 0.97 when callibration is done without phase effects
1200   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);       // 20537 when callibration is done without phase effects
1201 }
1202
1203 /***************************************************************************/
1204 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1205 /***************************************************************************/
1206 /* @TechReport{      rr-lip2002-40, */
1207 /*   author        = {Henri Casanova and Loris Marchal}, */
1208 /*   institution   = {LIP}, */
1209 /*   title         = {A Network Model for Simulation of Grid Application}, */
1210 /*   number        = {2002-40}, */
1211 /*   month         = {oct}, */
1212 /*   year          = {2002} */
1213 /* } */
1214 void surf_network_model_init_CM02(void)
1215 {
1216
1217   if (surf_network_model)
1218     return;
1219
1220   set_update_mechanism();
1221   im_surf_network_model_init_internal();
1222   im_net_define_callbacks();
1223   xbt_dynar_push(model_list, &surf_network_model);
1224   network_im_solve = lmm_solve;
1225
1226   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1227   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor", 1.0);
1228   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1229 }
1230
1231 /***************************************************************************/
1232 /* The models from Steven H. Low                                           */
1233 /***************************************************************************/
1234 /* @article{Low03,                                                         */
1235 /*   author={Steven H. Low},                                               */
1236 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1237 /*   year={2003},                                                          */
1238 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1239 /*    volume={11}, number={4},                                             */
1240 /*  }                                                                      */
1241 void surf_network_model_init_Reno(void)
1242 {
1243   if (surf_network_model)
1244     return;
1245
1246   set_update_mechanism();
1247   im_surf_network_model_init_internal();
1248   im_net_define_callbacks();
1249
1250   xbt_dynar_push(model_list, &surf_network_model);
1251   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1252                                     func_reno_fpi);
1253   network_im_solve = lagrange_solve;
1254
1255   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1256   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1257                             0.92);
1258   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1259 }
1260
1261
1262 void surf_network_model_init_Reno2(void)
1263 {
1264   if (surf_network_model)
1265     return;
1266
1267   set_update_mechanism();
1268   im_surf_network_model_init_internal();
1269   im_net_define_callbacks();
1270
1271   xbt_dynar_push(model_list, &surf_network_model);
1272   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1273                                     func_reno2_fpi);
1274   network_im_solve = lagrange_solve;
1275
1276   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1277   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1278                             0.92);
1279   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1280                             8775);
1281 }
1282
1283 void surf_network_model_init_Vegas(void)
1284 {
1285   if (surf_network_model)
1286     return;
1287
1288   set_update_mechanism();
1289   im_surf_network_model_init_internal();
1290   im_net_define_callbacks();
1291
1292   xbt_dynar_push(model_list, &surf_network_model);
1293   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1294                                     func_vegas_fpi);
1295   network_im_solve = lagrange_solve;
1296
1297   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1298   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1299                             0.92);
1300   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1301 }