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