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