src/surf/network.c

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