src/surf/network.c

   1
   2 /*
   3  * Network with improved management of tasks, IM (Improved Management).
   4  * Uses a heap to store actions so that the share_resources is faster.
   5  * This model automatically sets the selective update flag to 1 and is
   6  * highly dependent on the maxmin lmm module.
   7  */
   8
   9 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
  10  * All rights reserved.                                                     */
  11
  12 /* This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the license (GNU LGPL) which comes with this package. */
  14
  15 #include "network_private.h"
  16 #include "xbt/log.h"
  17 #include "xbt/str.h"
  18
  19 #include "surf_private.h"
  20 #include "xbt/dict.h"
  21 #include "maxmin_private.h"
  22 #include "surf/surfxml_parse_values.h"
  23 #include "surf/surf_resource.h"
  24 #include "surf/surf_resource_lmm.h"
  25
  26 #undef GENERIC_LMM_ACTION
  27 #undef GENERIC_ACTION
  28 #define GENERIC_LMM_ACTION(action) (action)->generic_lmm_action
  29 #define GENERIC_ACTION(action) GENERIC_LMM_ACTION(action).generic_action
  30
  31
  32 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  33                                 "Logging specific to the SURF network module");
  34
  35 surf_model_t surf_network_model = NULL;
  36 static lmm_system_t network_maxmin_system = NULL;
  37 static void (*network_solve) (lmm_system_t) = NULL;
  38
  39 xbt_dynar_t smpi_bw_factor = NULL;
  40 xbt_dynar_t smpi_lat_factor = NULL;
  41
  42 typedef struct s_smpi_factor *smpi_factor_t;
  43 typedef struct s_smpi_factor {
  44   long factor;
  45   double value;
  46 } s_smpi_factor_t;
  47
  48 double sg_sender_gap = 0.0;
  49 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  50 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  51 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  52
  53 double sg_tcp_gamma = 0.0;
  54 int sg_network_crosstraffic = 0;
  55
  56 xbt_dict_t gap_lookup = NULL;
  57
  58 e_UM_t network_update_mechanism = UM_UNDEFINED;
  59 static int net_selective_update = 0;
  60
  61 static int net_action_is_suspended(surf_action_t action);
  62 static void update_action_remaining_lazy(double now);
  63
  64 static xbt_swag_t net_modified_set = NULL;
  65 static xbt_heap_t net_action_heap = NULL;
  66
  67 /* added to manage the communication action's heap */
  68 static void net_action_update_index_heap(void *action, int i)
  69 {
  70   ((surf_action_network_CM02_t) action)->index_heap = i;
  71 }
  72
  73 /* insert action on heap using a given key and a hat (heap_action_type)
  74  * a hat can be of three types for communications:
  75  *
  76  * NORMAL = this is a normal heap entry stating the date to finish transmitting
  77  * LATENCY = this is a heap entry to warn us when the latency is payed
  78  * MAX_DURATION =this is a heap entry to warn us when the max_duration limit is reached
  79  */
  80 static void heap_insert(surf_action_network_CM02_t action, double key,
  81                         enum heap_action_type hat)
  82 {
  83   action->hat = hat;
  84   xbt_heap_push(net_action_heap, action, key);
  85 }
  86
  87 static void heap_remove(surf_action_network_CM02_t action)
  88 {
  89   action->hat = NOTSET;
  90   if (((surf_action_network_CM02_t) action)->index_heap >= 0) {
  91     xbt_heap_remove(net_action_heap, action->index_heap);
  92   }
  93 }
  94
  95 /******************************************************************************/
  96 /*                           Factors callbacks                                */
  97 /******************************************************************************/
  98 static double constant_latency_factor(double size)
  99 {
 100   return sg_latency_factor;
 101 }
 102
 103 static double constant_bandwidth_factor(double size)
 104 {
 105   return sg_bandwidth_factor;
 106 }
 107
 108 static double constant_bandwidth_constraint(double rate, double bound,
 109                                             double size)
 110 {
 111   return rate;
 112 }
 113
 114 /**********************/
 115 /*   SMPI callbacks   */
 116 /**********************/
 117 static xbt_dynar_t parse_factor(const char *smpi_coef_string)
 118 {
 119   char *value = NULL;
 120   unsigned int iter = 0;
 121   s_smpi_factor_t fact;
 122   xbt_dynar_t smpi_factor, radical_elements, radical_elements2 = NULL;
 123
 124   smpi_factor = xbt_dynar_new(sizeof(s_smpi_factor_t), NULL);
 125   radical_elements = xbt_str_split(smpi_coef_string, ";");
 126   xbt_dynar_foreach(radical_elements, iter, value) {
 127
 128     radical_elements2 = xbt_str_split(value, ":");
 129     if (xbt_dynar_length(radical_elements2) != 2)
 130       xbt_die("Malformed radical for smpi factor!");
 131     fact.factor = atol(xbt_dynar_get_as(radical_elements2, 0, char *));
 132     fact.value = atof(xbt_dynar_get_as(radical_elements2, 1, char *));
 133     xbt_dynar_push_as(smpi_factor, s_smpi_factor_t, fact);
 134     XBT_DEBUG("smpi_factor:\t%ld : %f", fact.factor, fact.value);
 135     xbt_dynar_free(&radical_elements2);
 136   }
 137   xbt_dynar_free(&radical_elements);
 138   return smpi_factor;
 139 }
 140
 141 static double smpi_bandwidth_factor(double size)
 142 {
 143   if (!smpi_bw_factor)
 144     smpi_bw_factor =
 145         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/bw_factor"));
 146
 147   unsigned int iter = 0;
 148   s_smpi_factor_t fact;
 149   xbt_dynar_foreach(smpi_bw_factor, iter, fact) {
 150     if (size >= fact.factor) {
 151       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 152       return fact.value;
 153     }
 154   }
 155
 156   return 1.0;
 157 }
 158
 159 static double smpi_latency_factor(double size)
 160 {
 161   if (!smpi_lat_factor)
 162     smpi_lat_factor =
 163         parse_factor(xbt_cfg_get_string(_surf_cfg_set, "smpi/lat_factor"));
 164
 165   unsigned int iter = 0;
 166   s_smpi_factor_t fact;
 167   xbt_dynar_foreach(smpi_lat_factor, iter, fact) {
 168     if (size >= fact.factor) {
 169       XBT_DEBUG("%lf >= %ld return %f", size, fact.factor, fact.value);
 170       return fact.value;
 171     }
 172   }
 173
 174   return 1.0;
 175 }
 176
 177 /**--------- <copy/paste C code snippet in surf/network.c> -----------*/
 178
 179 static double smpi_bandwidth_constraint(double rate, double bound,
 180                                         double size)
 181 {
 182   return rate < 0 ? bound : min(bound, rate * smpi_bandwidth_factor(size));
 183 }
 184
 185 static double (*latency_factor_callback) (double) =
 186     &constant_latency_factor;
 187 static double (*bandwidth_factor_callback) (double) =
 188     &constant_bandwidth_factor;
 189 static double (*bandwidth_constraint_callback) (double, double, double) =
 190     &constant_bandwidth_constraint;
 191
 192 static void (*gap_append) (double, const link_CM02_t,
 193                            surf_action_network_CM02_t) = NULL;
 194 static void (*gap_remove) (surf_action_network_CM02_t) = NULL;
 195
 196 static void *net_create_resource(const char *name,
 197                                  double bw_initial,
 198                                  tmgr_trace_t bw_trace,
 199                                  double lat_initial,
 200                                  tmgr_trace_t lat_trace,
 201                                  e_surf_resource_state_t
 202                                  state_initial,
 203                                  tmgr_trace_t state_trace,
 204                                  e_surf_link_sharing_policy_t
 205                                  policy, xbt_dict_t properties)
 206 {
 207   link_CM02_t nw_link = (link_CM02_t)
 208       surf_resource_lmm_new(sizeof(s_link_CM02_t),
 209                             surf_network_model, name, properties,
 210                             network_maxmin_system,
 211                             sg_bandwidth_factor * bw_initial,
 212                             history,
 213                             state_initial, state_trace,
 214                             bw_initial, bw_trace);
 215
 216   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 217              "Link '%s' declared several times in the platform file.",
 218              name);
 219
 220   nw_link->lat_current = lat_initial;
 221   if (lat_trace)
 222     nw_link->lat_event =
 223         tmgr_history_add_trace(history, lat_trace, 0.0, 0, nw_link);
 224
 225   if (policy == SURF_LINK_FATPIPE)
 226     lmm_constraint_shared(nw_link->lmm_resource.constraint);
 227
 228   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 229
 230   return nw_link;
 231 }
 232
 233 static void net_parse_link_init(sg_platf_link_cbarg_t link)
 234 {
 235   if (link->policy == SURF_LINK_FULLDUPLEX) {
 236     char *link_id;
 237     link_id = bprintf("%s_UP", link->id);
 238     net_create_resource(link_id,
 239                         link->bandwidth,
 240                         link->bandwidth_trace,
 241                         link->latency,
 242                         link->latency_trace,
 243                         link->state,
 244                         link->state_trace, link->policy, link->properties);
 245     xbt_free(link_id);
 246     link_id = bprintf("%s_DOWN", link->id);
 247     net_create_resource(link_id,
 248                         link->bandwidth,
 249                         link->bandwidth_trace,
 250                         link->latency,
 251                         link->latency_trace,
 252                         link->state,
 253                         link->state_trace, link->policy, link->properties);
 254     xbt_free(link_id);
 255   } else {
 256     net_create_resource(link->id,
 257                         link->bandwidth,
 258                         link->bandwidth_trace,
 259                         link->latency,
 260                         link->latency_trace,
 261                         link->state,
 262                         link->state_trace, link->policy, link->properties);
 263   }
 264 }
 265
 266 static void net_add_traces(void)
 267 {
 268   xbt_dict_cursor_t cursor = NULL;
 269   char *trace_name, *elm;
 270
 271   static int called = 0;
 272   if (called)
 273     return;
 274   called = 1;
 275
 276   /* connect all traces relative to network */
 277   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 278     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 279     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 280
 281     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 282                trace_name, elm);
 283     xbt_assert(trace,
 284                "Cannot connect trace %s to link %s: trace undefined",
 285                trace_name, elm);
 286
 287     link->lmm_resource.state_event =
 288         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 289   }
 290
 291   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 292     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 293     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 294
 295     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 296                trace_name, elm);
 297     xbt_assert(trace,
 298                "Cannot connect trace %s to link %s: trace undefined",
 299                trace_name, elm);
 300
 301     link->lmm_resource.power.event =
 302         tmgr_history_add_trace(history, trace, 0.0, 0, link);
 303   }
 304
 305   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 306     tmgr_trace_t trace = xbt_dict_get_or_null(traces_set_list, trace_name);
 307     link_CM02_t link = xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL);
 308
 309     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 310                trace_name, elm);
 311     xbt_assert(trace,
 312                "Cannot connect trace %s to link %s: trace undefined",
 313                trace_name, elm);
 314
 315     link->lat_event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 316   }
 317 }
 318
 319 static void net_define_callbacks(void)
 320 {
 321   /* Figuring out the network links */
 322   sg_platf_link_add_cb(net_parse_link_init);
 323   sg_platf_postparse_add_cb(net_add_traces);
 324 }
 325
 326 static int net_resource_used(void *resource_id)
 327 {
 328   return lmm_constraint_used(network_maxmin_system, ((surf_resource_lmm_t)
 329                                                      resource_id)->
 330                              constraint);
 331 }
 332
 333 static int net_action_unref(surf_action_t action)
 334 {
 335   action->refcount--;
 336   if (!action->refcount) {
 337     xbt_swag_remove(action, action->state_set);
 338     if (((surf_action_lmm_t)action)->variable) {
 339       lmm_variable_free(network_maxmin_system,
 340                         ((surf_action_lmm_t) action)->variable);
 341     }
 342     if (network_update_mechanism == UM_LAZY) {  // remove action from the heap
 343       heap_remove((surf_action_network_CM02_t) action);
 344       xbt_swag_remove(action, net_modified_set);
 345     }
 346 #ifdef HAVE_TRACING
 347     xbt_free(((surf_action_network_CM02_t) action)->src_name);
 348     xbt_free(((surf_action_network_CM02_t) action)->dst_name);
 349     xbt_free(action->category);
 350 #endif
 351     surf_action_free(&action);
 352     return 1;
 353   }
 354   return 0;
 355 }
 356
 357
 358
 359 static void net_action_cancel(surf_action_t action)
 360 {
 361   XBT_DEBUG("cancel action %p", action);
 362   surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 363   if (network_update_mechanism == UM_LAZY) {    // remove action from the heap
 364     xbt_swag_remove(action, net_modified_set);
 365     heap_remove((surf_action_network_CM02_t) action);
 366   }
 367 }
 368
 369 void net_action_recycle(surf_action_t action)
 370 {
 371   return;
 372 }
 373
 374 #ifdef HAVE_LATENCY_BOUND_TRACKING
 375 int net_get_link_latency_limited(surf_action_t action)
 376 {
 377   return action->latency_limited;
 378 }
 379 #endif
 380
 381 double net_action_get_remains(surf_action_t action)
 382 {
 383   if (network_update_mechanism == UM_LAZY)      /* update remains before return it */
 384     update_action_remaining_lazy(surf_get_clock());
 385   return action->remains;
 386 }
 387
 388 static void update_action_remaining_lazy(double now)
 389 {
 390   surf_action_network_CM02_t action = NULL;
 391   double delta = 0.0;
 392
 393   xbt_swag_foreach(action, net_modified_set) {
 394
 395     if (GENERIC_LMM_ACTION(action).suspended != 0) {
 396       continue;
 397     }
 398
 399     delta = now - action->last_update;
 400
 401     double_update(&(((surf_action_t)action)->remains),
 402                   lmm_variable_getvalue(((surf_action_lmm_t) action)->variable) * delta);
 403
 404     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 405       double_update(&(((surf_action_t)action)->max_duration), delta);
 406
 407     if ((((surf_action_t)action)->remains <= 0) &&
 408         (lmm_get_variable_weight(((surf_action_lmm_t)action)->variable) > 0)) {
 409       ((surf_action_t)action)->finish = surf_get_clock();
 410       surf_network_model->action_state_set((surf_action_t) action,
 411                                            SURF_ACTION_DONE);
 412       heap_remove(action);
 413     } else if (((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 414                && (((surf_action_t)action)->max_duration <= 0))) {
 415       ((surf_action_t)action)->finish = surf_get_clock();
 416       surf_network_model->action_state_set((surf_action_t) action,
 417                                            SURF_ACTION_DONE);
 418       heap_remove(action);
 419     }
 420
 421     action->last_update = now;
 422   }
 423 }
 424
 425 static double net_share_resources_full(double now)
 426 {
 427   s_surf_action_lmm_t s_action;
 428   surf_action_network_CM02_t action = NULL;
 429   xbt_swag_t running_actions =
 430       surf_network_model->states.running_action_set;
 431   double min;
 432
 433   min = generic_maxmin_share_resources(running_actions,
 434                                        xbt_swag_offset(s_action,
 435                                                        variable),
 436                                        network_maxmin_system,
 437                                        network_solve);
 438
 439 #define VARIABLE(action) (*((lmm_variable_t*)(((char *) (action)) + xbt_swag_offset(s_action, variable)  )))
 440
 441   xbt_swag_foreach(action, running_actions) {
 442 #ifdef HAVE_LATENCY_BOUND_TRACKING
 443     if (lmm_is_variable_limited_by_latency(action->variable)) {
 444       GENERIC_LMM_ACTION(action).latency_limited = 1;
 445     } else {
 446       GENERIC_LMM_ACTION(action).latency_limited = 0;
 447     }
 448 #endif
 449     if (action->latency > 0) {
 450       min = (min < 0) ? action->latency : min(min, action->latency);
 451     }
 452   }
 453
 454   XBT_DEBUG("Min of share resources %f", min);
 455
 456   return min;
 457 }
 458
 459 static double net_share_resources_lazy(double now)
 460 {
 461   surf_action_network_CM02_t action = NULL;
 462   double min = -1;
 463   double value;
 464
 465   XBT_DEBUG
 466       ("Before share resources, the size of modified actions set is %d",
 467        xbt_swag_size(net_modified_set));
 468   update_action_remaining_lazy(now);
 469
 470   lmm_solve(network_maxmin_system);
 471
 472   XBT_DEBUG
 473       ("After share resources, The size of modified actions set is %d",
 474        xbt_swag_size(net_modified_set));
 475
 476   xbt_swag_foreach(action, net_modified_set) {
 477     int max_dur_flag = 0;
 478
 479     if (GENERIC_ACTION(action).state_set !=
 480         surf_network_model->states.running_action_set)
 481       continue;
 482
 483     /* bogus priority, skip it */
 484     if (GENERIC_ACTION(action).priority <= 0)
 485       continue;
 486
 487     min = -1;
 488     value = lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable);
 489     if (value > 0) {
 490       if (GENERIC_ACTION(action).remains > 0) {
 491         value = GENERIC_ACTION(action).remains / value;
 492         min = now + value;
 493       } else {
 494         value = 0.0;
 495         min = now;
 496       }
 497     }
 498
 499     if ((GENERIC_ACTION(action).max_duration != NO_MAX_DURATION)
 500         && (min == -1
 501             || GENERIC_ACTION(action).start +
 502             GENERIC_ACTION(action).max_duration < min)) {
 503       min = GENERIC_ACTION(action).start +
 504           GENERIC_ACTION(action).max_duration;
 505       max_dur_flag = 1;
 506     }
 507
 508     XBT_DEBUG("Action(%p) Start %lf Finish %lf Max_duration %lf", action,
 509               GENERIC_ACTION(action).start, now + value,
 510               GENERIC_ACTION(action).max_duration);
 511
 512     if (action->index_heap >= 0) {
 513       heap_remove(action);
 514     }
 515
 516     if (min != -1) {
 517       heap_insert(action, min, max_dur_flag ? MAX_DURATION : NORMAL);
 518       XBT_DEBUG("Insert at heap action(%p) min %lf now %lf", action, min,
 519                 now);
 520     }
 521   }
 522
 523   //hereafter must have already the min value for this resource model
 524   if (xbt_heap_size(net_action_heap) > 0)
 525     min = xbt_heap_maxkey(net_action_heap) - now;
 526   else
 527     min = -1;
 528
 529   XBT_DEBUG("The minimum with the HEAP %lf", min);
 530
 531   return min;
 532 }
 533
 534 static void net_update_actions_state_full(double now, double delta)
 535 {
 536   double deltap = 0.0;
 537   surf_action_network_CM02_t action = NULL;
 538   surf_action_network_CM02_t next_action = NULL;
 539   xbt_swag_t running_actions =
 540       surf_network_model->states.running_action_set;
 541   /*
 542      xbt_swag_t failed_actions =
 543      surf_network_model->states.failed_action_set;
 544    */
 545
 546   xbt_swag_foreach_safe(action, next_action, running_actions) {
 547     deltap = delta;
 548     if (action->latency > 0) {
 549       if (action->latency > deltap) {
 550         double_update(&(action->latency), deltap);
 551         deltap = 0.0;
 552       } else {
 553         double_update(&(deltap), action->latency);
 554         action->latency = 0.0;
 555       }
 556       if ((action->latency == 0.0) && !(GENERIC_LMM_ACTION(action).suspended))
 557         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 558                                    action->weight);
 559     }
 560 #ifdef HAVE_TRACING
 561     if (TRACE_is_enabled()) {
 562       xbt_dynar_t route = NULL;
 563       routing_get_route_and_latency(action->src_name, action->dst_name,
 564                                     &route, NULL);
 565       link_CM02_t link;
 566       unsigned int i;
 567       xbt_dynar_foreach(route, i, link) {
 568         TRACE_surf_link_set_utilization(link->lmm_resource.
 569                                         generic_resource.name,
 570                                         (((surf_action_t)action)->data,
 571                                         (surf_action_t) action,
 572                                         lmm_variable_getvalue(action->
 573                                                               variable),
 574                                         now - delta, delta);
 575       }
 576     }
 577 #endif
 578     if (!lmm_get_number_of_cnst_from_var
 579         (network_maxmin_system, GENERIC_LMM_ACTION(action).variable)) {
 580       /* There is actually no link used, hence an infinite bandwidth.
 581        * This happens often when using models like vivaldi.
 582        * In such case, just make sure that the action completes immediately.
 583        */
 584       double_update(&(GENERIC_ACTION(action).remains),
 585                     GENERIC_ACTION(action).remains);
 586     }
 587     double_update(&(GENERIC_ACTION(action).remains),
 588                   lmm_variable_getvalue(GENERIC_LMM_ACTION(action).variable) * deltap);
 589     if (((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 590       double_update(&(((surf_action_t)action)->max_duration), delta);
 591
 592     if ((GENERIC_ACTION(action).remains <= 0) &&
 593         (lmm_get_variable_weight(GENERIC_LMM_ACTION(action).variable) > 0)) {
 594       ((surf_action_t)action)->finish = surf_get_clock();
 595       surf_network_model->action_state_set((surf_action_t) action,
 596                                            SURF_ACTION_DONE);
 597
 598       if (gap_remove)
 599         gap_remove(action);
 600     } else if ((((surf_action_t)action)->max_duration != NO_MAX_DURATION)
 601                && (((surf_action_t)action)->max_duration <= 0)) {
 602       ((surf_action_t)action)->finish = surf_get_clock();
 603       surf_network_model->action_state_set((surf_action_t) action,
 604                                            SURF_ACTION_DONE);
 605       if (gap_remove)
 606         gap_remove(action);
 607     }
 608   }
 609
 610   return;
 611 }
 612
 613 static void net_update_actions_state_lazy(double now, double delta)
 614 {
 615   surf_action_network_CM02_t action = NULL;
 616
 617   while ((xbt_heap_size(net_action_heap) > 0)
 618          && (double_equals(xbt_heap_maxkey(net_action_heap), now))) {
 619     action = xbt_heap_pop(net_action_heap);
 620     XBT_DEBUG("Action %p: finish", action);
 621     GENERIC_ACTION(action).finish = surf_get_clock();
 622
 623     // if I am wearing a latency hat
 624     if (action->hat == LATENCY) {
 625       lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 626                                  action->weight);
 627       heap_remove(action);
 628       action->last_update = surf_get_clock();
 629
 630       // if I am wearing a max_duration or normal hat
 631     } else if (action->hat == MAX_DURATION || action->hat == NORMAL) {
 632       // no need to communicate anymore
 633       // assume that flows that reached max_duration have remaining of 0
 634       GENERIC_ACTION(action).remains = 0;
 635       ((surf_action_t)action)->finish = surf_get_clock();
 636       surf_network_model->action_state_set((surf_action_t) action,
 637                                            SURF_ACTION_DONE);
 638       heap_remove(action);
 639     }
 640   }
 641   return;
 642 }
 643
 644 static void net_update_resource_state(void *id,
 645                                       tmgr_trace_event_t event_type,
 646                                       double value, double date)
 647 {
 648   link_CM02_t nw_link = id;
 649   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 650   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 651   /*     value, event_type); */
 652
 653   if (event_type == nw_link->lmm_resource.power.event) {
 654     double delta =
 655         sg_weight_S_parameter / value - sg_weight_S_parameter /
 656         (nw_link->lmm_resource.power.peak *
 657          nw_link->lmm_resource.power.scale);
 658     lmm_variable_t var = NULL;
 659     lmm_element_t elem = NULL;
 660     surf_action_network_CM02_t action = NULL;
 661
 662     nw_link->lmm_resource.power.peak = value;
 663     lmm_update_constraint_bound(network_maxmin_system,
 664                                 nw_link->lmm_resource.constraint,
 665                                 sg_bandwidth_factor *
 666                                 (nw_link->lmm_resource.power.peak *
 667                                  nw_link->lmm_resource.power.scale));
 668 #ifdef HAVE_TRACING
 669     TRACE_surf_link_set_bandwidth(date,
 670                                   (char
 671                                    *) (((nw_link->lmm_resource).
 672                                         generic_resource).name),
 673                                   sg_bandwidth_factor *
 674                                   (nw_link->lmm_resource.power.peak *
 675                                    nw_link->lmm_resource.power.scale));
 676 #endif
 677     if (sg_weight_S_parameter > 0) {
 678       while ((var = lmm_get_var_from_cnst
 679               (network_maxmin_system, nw_link->lmm_resource.constraint,
 680                &elem))) {
 681         action = lmm_variable_id(var);
 682         action->weight += delta;
 683         if (!(GENERIC_LMM_ACTION(action).suspended))
 684           lmm_update_variable_weight(network_maxmin_system,
 685                                      GENERIC_LMM_ACTION(action).variable, action->weight);
 686       }
 687     }
 688     if (tmgr_trace_event_free(event_type))
 689       nw_link->lmm_resource.power.event = NULL;
 690   } else if (event_type == nw_link->lat_event) {
 691     double delta = value - nw_link->lat_current;
 692     lmm_variable_t var = NULL;
 693     lmm_element_t elem = NULL;
 694     surf_action_network_CM02_t action = NULL;
 695
 696     nw_link->lat_current = value;
 697     while ((var = lmm_get_var_from_cnst
 698             (network_maxmin_system, nw_link->lmm_resource.constraint,
 699              &elem))) {
 700       action = lmm_variable_id(var);
 701       action->lat_current += delta;
 702       action->weight += delta;
 703       if (action->rate < 0)
 704         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 705                                   sg_tcp_gamma / (2.0 *
 706                                                   action->lat_current));
 707       else {
 708         lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 709                                   min(action->rate,
 710                                       sg_tcp_gamma / (2.0 *
 711                                                       action->
 712                                                       lat_current)));
 713
 714         if (action->rate < sg_tcp_gamma / (2.0 * action->lat_current)) {
 715           XBT_INFO("Flow is limited BYBANDWIDTH");
 716         } else {
 717           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 718                    action->lat_current);
 719         }
 720       }
 721       if (!(GENERIC_LMM_ACTION(action).suspended))
 722         lmm_update_variable_weight(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 723                                    action->weight);
 724
 725     }
 726     if (tmgr_trace_event_free(event_type))
 727       nw_link->lat_event = NULL;
 728   } else if (event_type == nw_link->lmm_resource.state_event) {
 729     if (value > 0)
 730       nw_link->lmm_resource.state_current = SURF_RESOURCE_ON;
 731     else {
 732       lmm_constraint_t cnst = nw_link->lmm_resource.constraint;
 733       lmm_variable_t var = NULL;
 734       lmm_element_t elem = NULL;
 735
 736       nw_link->lmm_resource.state_current = SURF_RESOURCE_OFF;
 737       while ((var = lmm_get_var_from_cnst
 738               (network_maxmin_system, cnst, &elem))) {
 739         surf_action_t action = lmm_variable_id(var);
 740
 741         if (surf_action_state_get(action) == SURF_ACTION_RUNNING ||
 742             surf_action_state_get(action) == SURF_ACTION_READY) {
 743           action->finish = date;
 744           surf_network_model->action_state_set(action, SURF_ACTION_FAILED);
 745         }
 746       }
 747     }
 748     if (tmgr_trace_event_free(event_type))
 749       nw_link->lmm_resource.state_event = NULL;
 750   } else {
 751     XBT_CRITICAL("Unknown event ! \n");
 752     xbt_abort();
 753   }
 754
 755   XBT_DEBUG
 756       ("There were a resource state event, need to update actions related to the constraint (%p)",
 757        nw_link->lmm_resource.constraint);
 758   return;
 759 }
 760
 761
 762 static surf_action_t net_communicate(const char *src_name,
 763                                      const char *dst_name, double size,
 764                                      double rate)
 765 {
 766   unsigned int i;
 767   link_CM02_t link;
 768   int failed = 0;
 769   surf_action_network_CM02_t action = NULL;
 770   double bandwidth_bound;
 771   double latency = 0.0;
 772   xbt_dynar_t back_route = NULL;
 773   int constraints_per_variable = 0;
 774
 775   xbt_dynar_t route = xbt_dynar_new(global_routing->size_of_link, NULL);
 776
 777   XBT_IN("(%s,%s,%g,%g)", src_name, dst_name, size, rate);
 778
 779   routing_get_route_and_latency(src_name, dst_name, &route, &latency);
 780   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 781              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 782              src_name, dst_name);
 783
 784   xbt_dynar_foreach(route, i, link) {
 785     if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 786       failed = 1;
 787       break;
 788     }
 789   }
 790   if (sg_network_crosstraffic == 1) {
 791     routing_get_route_and_latency(dst_name, src_name, &back_route, NULL);
 792     xbt_dynar_foreach(back_route, i, link) {
 793       if (link->lmm_resource.state_current == SURF_RESOURCE_OFF) {
 794         failed = 1;
 795         break;
 796       }
 797     }
 798   }
 799
 800   action =
 801       surf_action_new(sizeof(s_surf_action_network_CM02_t), size,
 802                       surf_network_model, failed);
 803 #ifdef HAVE_LATENCY_BOUND_TRACKING
 804   (GENERIC_LMM_ACTION(action)).latency_limited = 0;
 805 #endif
 806   action->weight = action->latency = latency;
 807
 808   xbt_swag_insert(action, ((surf_action_t)action)->state_set);
 809   action->rate = rate;
 810   if (network_update_mechanism == UM_LAZY) {
 811     action->index_heap = -1;
 812     action->last_update = surf_get_clock();
 813   }
 814
 815   bandwidth_bound = -1.0;
 816   if (sg_weight_S_parameter > 0) {
 817     xbt_dynar_foreach(route, i, link) {
 818       action->weight +=
 819           sg_weight_S_parameter /
 820           (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 821     }
 822   }
 823   xbt_dynar_foreach(route, i, link) {
 824     double bb = bandwidth_factor_callback(size) *
 825         (link->lmm_resource.power.peak * link->lmm_resource.power.scale);
 826     bandwidth_bound =
 827         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 828   }
 829
 830   action->lat_current = action->latency;
 831   action->latency *= latency_factor_callback(size);
 832   action->rate =
 833       bandwidth_constraint_callback(action->rate, bandwidth_bound, size);
 834   if (gap_append) {
 835     xbt_assert(!xbt_dynar_is_empty(route),
 836                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 837
 838     link = *(link_CM02_t *) xbt_dynar_get_ptr(route, 0);
 839     gap_append(size, link, action);
 840     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 841               action, src_name, dst_name, action->sender.gap,
 842               action->latency);
 843   }
 844
 845   constraints_per_variable = xbt_dynar_length(route);
 846   if (back_route != NULL)
 847     constraints_per_variable += xbt_dynar_length(back_route);
 848
 849   if (action->latency > 0) {
 850     GENERIC_LMM_ACTION(action).variable =
 851         lmm_variable_new(network_maxmin_system, action, 0.0, -1.0,
 852                          constraints_per_variable);
 853     if (network_update_mechanism == UM_LAZY) {
 854       // add to the heap the event when the latency is payed
 855       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 856                 action->latency + action->last_update);
 857       heap_insert(action, action->latency + action->last_update,
 858                   xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 859     }
 860   } else
 861     GENERIC_LMM_ACTION(action).variable =
 862         lmm_variable_new(network_maxmin_system, action, 1.0, -1.0,
 863                          constraints_per_variable);
 864
 865   if (action->rate < 0) {
 866     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 867                               (action->lat_current > 0) ?
 868                               sg_tcp_gamma / (2.0 *
 869                                               action->lat_current) : -1.0);
 870   } else {
 871     lmm_update_variable_bound(network_maxmin_system, GENERIC_LMM_ACTION(action).variable,
 872                               (action->lat_current > 0) ?
 873                               min(action->rate,
 874                                   sg_tcp_gamma / (2.0 *
 875                                                   action->lat_current))
 876                               : action->rate);
 877   }
 878
 879   xbt_dynar_foreach(route, i, link) {
 880     lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 881                GENERIC_LMM_ACTION(action).variable, 1.0);
 882   }
 883
 884   if (sg_network_crosstraffic == 1) {
 885     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 886     xbt_dynar_foreach(back_route, i, link) {
 887       lmm_expand(network_maxmin_system, link->lmm_resource.constraint,
 888                  GENERIC_LMM_ACTION(action).variable, .05);
 889     }
 890   }
 891 #ifdef HAVE_TRACING
 892   if (TRACE_is_enabled()) {
 893     action->src_name = xbt_strdup(src_name);
 894     action->dst_name = xbt_strdup(dst_name);
 895   } else {
 896     action->src_name = action->dst_name = NULL;
 897   }
 898 #endif
 899
 900   xbt_dynar_free(&route);
 901   XBT_OUT();
 902
 903   return (surf_action_t) action;
 904 }
 905
 906 static xbt_dynar_t net_get_route(const char *src, const char *dst)
 907 {
 908   xbt_dynar_t route = NULL;
 909   routing_get_route_and_latency(src, dst, &route, NULL);
 910   return route;
 911 }
 912
 913 static double net_get_link_bandwidth(const void *link)
 914 {
 915   surf_resource_lmm_t lmm = (surf_resource_lmm_t) link;
 916   return lmm->power.peak * lmm->power.scale;
 917 }
 918
 919 static double net_get_link_latency(const void *link)
 920 {
 921   return ((link_CM02_t) link)->lat_current;
 922 }
 923
 924 static int net_link_shared(const void *link)
 925 {
 926   return
 927       lmm_constraint_is_shared(((surf_resource_lmm_t) link)->constraint);
 928 }
 929
 930 static void net_action_suspend(surf_action_t action)
 931 {
 932   ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 1;
 933   lmm_update_variable_weight(network_maxmin_system,
 934                              ((surf_action_network_CM02_t)
 935                               action)->generic_lmm_action.variable, 0.0);
 936
 937   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 938     heap_remove((surf_action_network_CM02_t) action);
 939 }
 940
 941 static void net_action_resume(surf_action_t action)
 942 {
 943   if (((surf_action_network_CM02_t) action)->generic_lmm_action.suspended) {
 944     lmm_update_variable_weight(network_maxmin_system,
 945                                ((surf_action_network_CM02_t)
 946                                 action)->generic_lmm_action.variable,
 947                                ((surf_action_network_CM02_t)
 948                                 action)->weight);
 949     ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended = 0;
 950     if (network_update_mechanism == UM_LAZY)    // remove action from the heap
 951       heap_remove((surf_action_network_CM02_t) action);
 952   }
 953 }
 954
 955 static int net_action_is_suspended(surf_action_t action)
 956 {
 957   return ((surf_action_network_CM02_t) action)->generic_lmm_action.suspended;
 958 }
 959
 960 void net_action_set_max_duration(surf_action_t action, double duration)
 961 {
 962   action->max_duration = duration;
 963   if (network_update_mechanism == UM_LAZY)      // remove action from the heap
 964     heap_remove((surf_action_network_CM02_t) action);
 965 }
 966
 967 #ifdef HAVE_TRACING
 968 static void net_action_set_category(surf_action_t action,
 969                                     const char *category)
 970 {
 971   action->category = xbt_strdup(category);
 972 }
 973 #endif
 974
 975 static void net_finalize(void)
 976 {
 977   surf_model_exit(surf_network_model);
 978   surf_network_model = NULL;
 979
 980   lmm_system_free(network_maxmin_system);
 981   network_maxmin_system = NULL;
 982
 983   if (network_update_mechanism == UM_LAZY) {
 984     xbt_heap_free(net_action_heap);
 985     xbt_swag_free(net_modified_set);
 986   }
 987
 988   if (smpi_bw_factor)
 989     xbt_dynar_free(&smpi_bw_factor);
 990   if (smpi_lat_factor)
 991     xbt_dynar_free(&smpi_lat_factor);
 992 }
 993
 994 static void smpi_gap_append(double size, const link_CM02_t link,
 995                             surf_action_network_CM02_t action)
 996 {
 997   const char *src = link->lmm_resource.generic_resource.name;
 998   xbt_fifo_t fifo;
 999   surf_action_network_CM02_t last_action;
1000   double bw;
1001
1002   if (sg_sender_gap > 0.0) {
1003     if (!gap_lookup) {
1004       gap_lookup = xbt_dict_new();
1005     }
1006     fifo = (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup, src);
1007     action->sender.gap = 0.0;
1008     if (fifo && xbt_fifo_size(fifo) > 0) {
1009       /* Compute gap from last send */
1010       last_action =
1011           (surf_action_network_CM02_t)
1012           xbt_fifo_get_item_content(xbt_fifo_get_last_item(fifo));
1013       bw = net_get_link_bandwidth(link);
1014       action->sender.gap =
1015           last_action->sender.gap + max(sg_sender_gap,
1016                                         last_action->sender.size / bw);
1017       action->latency += action->sender.gap;
1018     }
1019     /* Append action as last send */
1020     action->sender.link_name = link->lmm_resource.generic_resource.name;
1021     fifo =
1022         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1023                                           action->sender.link_name);
1024     if (!fifo) {
1025       fifo = xbt_fifo_new();
1026       xbt_dict_set(gap_lookup, action->sender.link_name, fifo, NULL);
1027     }
1028     action->sender.fifo_item = xbt_fifo_push(fifo, action);
1029     action->sender.size = size;
1030   }
1031 }
1032
1033 static void smpi_gap_remove(surf_action_network_CM02_t action)
1034 {
1035   xbt_fifo_t fifo;
1036   size_t size;
1037
1038   if (sg_sender_gap > 0.0 && action->sender.link_name
1039       && action->sender.fifo_item) {
1040     fifo =
1041         (xbt_fifo_t) xbt_dict_get_or_null(gap_lookup,
1042                                           action->sender.link_name);
1043     xbt_fifo_remove_item(fifo, action->sender.fifo_item);
1044     size = xbt_fifo_size(fifo);
1045     if (size == 0) {
1046       xbt_fifo_free(fifo);
1047       xbt_dict_remove(gap_lookup, action->sender.link_name);
1048       size = xbt_dict_length(gap_lookup);
1049       if (size == 0) {
1050         xbt_dict_free(&gap_lookup);
1051       }
1052     }
1053   }
1054 }
1055
1056 static void surf_network_model_init_internal(void)
1057 {
1058   s_surf_action_network_CM02_t comm;
1059   surf_network_model = surf_model_init();
1060
1061   surf_network_model->name = "network";
1062   surf_network_model->action_unref = net_action_unref;
1063   surf_network_model->action_cancel = net_action_cancel;
1064   surf_network_model->action_recycle = net_action_recycle;
1065   surf_network_model->get_remains = net_action_get_remains;
1066 #ifdef HAVE_LATENCY_BOUND_TRACKING
1067   surf_network_model->get_latency_limited = net_get_link_latency_limited;
1068 #endif
1069 #ifdef HAVE_TRACING
1070   surf_network_model->set_category = net_action_set_category;
1071 #endif
1072
1073   surf_network_model->model_private->resource_used = net_resource_used;
1074   if (network_update_mechanism == UM_LAZY) {
1075     surf_network_model->model_private->share_resources =
1076         net_share_resources_lazy;
1077     surf_network_model->model_private->update_actions_state =
1078         net_update_actions_state_lazy;
1079   } else if (network_update_mechanism == UM_FULL) {
1080     surf_network_model->model_private->share_resources =
1081         net_share_resources_full;
1082     surf_network_model->model_private->update_actions_state =
1083         net_update_actions_state_full;
1084   }
1085
1086   surf_network_model->model_private->update_resource_state =
1087       net_update_resource_state;
1088   surf_network_model->model_private->finalize = net_finalize;
1089
1090   surf_network_model->suspend = net_action_suspend;
1091   surf_network_model->resume = net_action_resume;
1092   surf_network_model->is_suspended = net_action_is_suspended;
1093   surf_cpu_model->set_max_duration = net_action_set_max_duration;
1094
1095   surf_network_model->extension.network.communicate = net_communicate;
1096   surf_network_model->extension.network.get_route = net_get_route;
1097   surf_network_model->extension.network.get_link_bandwidth =
1098       net_get_link_bandwidth;
1099   surf_network_model->extension.network.get_link_latency =
1100       net_get_link_latency;
1101   surf_network_model->extension.network.link_shared = net_link_shared;
1102   surf_network_model->extension.network.add_traces = net_add_traces;
1103   surf_network_model->extension.network.create_resource =
1104       net_create_resource;
1105
1106   if (!network_maxmin_system)
1107     network_maxmin_system = lmm_system_new(net_selective_update);
1108
1109   routing_model_create(sizeof(link_CM02_t),
1110                        net_create_resource("__loopback__",
1111                                            498000000, NULL, 0.000015, NULL,
1112                                            SURF_RESOURCE_ON, NULL,
1113                                            SURF_LINK_FATPIPE, NULL));
1114
1115   if (network_update_mechanism == UM_LAZY) {
1116     net_action_heap = xbt_heap_new(8, NULL);
1117     xbt_heap_set_update_callback(net_action_heap,
1118                                  net_action_update_index_heap);
1119     net_modified_set =
1120         xbt_swag_new(xbt_swag_offset(comm, action_list_hookup));
1121     network_maxmin_system->keep_track = net_modified_set;
1122   }
1123 }
1124
1125 static void set_update_mechanism(void)
1126 {
1127 #ifdef HAVE_TRACING
1128   TRACE_set_network_update_mechanism();
1129 #endif
1130
1131   char *optim = xbt_cfg_get_string(_surf_cfg_set, "network/optim");
1132   int select =
1133       xbt_cfg_get_int(_surf_cfg_set, "network/maxmin_selective_update");
1134
1135   if (!strcmp(optim, "Full")) {
1136     network_update_mechanism = UM_FULL;
1137     net_selective_update = select;
1138   } else if (!strcmp(optim, "Lazy")) {
1139     network_update_mechanism = UM_LAZY;
1140     net_selective_update = 1;
1141     xbt_assert((select == 1)
1142                ||
1143                (xbt_cfg_is_default_value
1144                 (_surf_cfg_set, "network/maxmin_selective_update")),
1145                "Disabling selective update while using the lazy update mechanism is dumb!");
1146   } else {
1147     xbt_die("Unsupported optimization (%s) for this model", optim);
1148   }
1149 }
1150
1151 /************************************************************************/
1152 /* New model based on LV08 and experimental results of MPI ping-pongs   */
1153 /************************************************************************/
1154 /* @Inproceedings{smpi_ipdps, */
1155 /*  author={Pierre-Nicolas Clauss and Mark Stillwell and Stéphane Genaud and Frédéric Suter and Henri Casanova and Martin Quinson}, */
1156 /*  title={Single Node On-Line Simulation of {MPI} Applications with SMPI}, */
1157 /*  booktitle={25th IEEE International Parallel and Distributed Processing Symposium (IPDPS'11)}, */
1158 /*  address={Anchorage (Alaska) USA}, */
1159 /*  month=may, */
1160 /*  year={2011} */
1161 /*  } */
1162 void surf_network_model_init_SMPI(void)
1163 {
1164
1165   if (surf_network_model)
1166     return;
1167   set_update_mechanism();
1168
1169   surf_network_model_init_internal();
1170   latency_factor_callback = &smpi_latency_factor;
1171   bandwidth_factor_callback = &smpi_bandwidth_factor;
1172   bandwidth_constraint_callback = &smpi_bandwidth_constraint;
1173   gap_append = &smpi_gap_append;
1174   gap_remove = &smpi_gap_remove;
1175   net_define_callbacks();
1176   xbt_dynar_push(model_list, &surf_network_model);
1177   network_solve = lmm_solve;
1178
1179   xbt_cfg_setdefault_double(_surf_cfg_set, "network/sender_gap", 10e-6);
1180   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1181 }
1182
1183 /************************************************************************/
1184 /* New model based on optimizations discussed during Pedro Velho's thesis*/
1185 /************************************************************************/
1186 /* @techreport{VELHO:2011:HAL-00646896:1, */
1187 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
1188 /*      title = {{Flow-level network models: have we reached the limits?}}, */
1189 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
1190 /*      type = {Rapport de recherche}, */
1191 /*      institution = {INRIA}, */
1192 /*      number = {RR-7821}, */
1193 /*      year = {2011}, */
1194 /*      month = Nov, */
1195 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
1196 /*  } */
1197 void surf_network_model_init_LegrandVelho(void)
1198 {
1199   if (surf_network_model)
1200     return;
1201
1202   set_update_mechanism();
1203
1204   surf_network_model_init_internal();
1205   net_define_callbacks();
1206   xbt_dynar_push(model_list, &surf_network_model);
1207   network_solve = lmm_solve;
1208
1209   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor",
1210                             13.01);
1211   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1212                             0.97);
1213   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 20537);
1214 }
1215
1216 /***************************************************************************/
1217 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
1218 /***************************************************************************/
1219 /* @TechReport{      rr-lip2002-40, */
1220 /*   author        = {Henri Casanova and Loris Marchal}, */
1221 /*   institution   = {LIP}, */
1222 /*   title         = {A Network Model for Simulation of Grid Application}, */
1223 /*   number        = {2002-40}, */
1224 /*   month         = {oct}, */
1225 /*   year          = {2002} */
1226 /* } */
1227 void surf_network_model_init_CM02(void)
1228 {
1229
1230   if (surf_network_model)
1231     return;
1232
1233   set_update_mechanism();
1234   surf_network_model_init_internal();
1235   net_define_callbacks();
1236   xbt_dynar_push(model_list, &surf_network_model);
1237   network_solve = lmm_solve;
1238
1239   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 1.0);
1240   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1241                             1.0);
1242   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 0.0);
1243 }
1244
1245 /***************************************************************************/
1246 /* The models from Steven H. Low                                           */
1247 /***************************************************************************/
1248 /* @article{Low03,                                                         */
1249 /*   author={Steven H. Low},                                               */
1250 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
1251 /*   year={2003},                                                          */
1252 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
1253 /*    volume={11}, number={4},                                             */
1254 /*  }                                                                      */
1255 void surf_network_model_init_Reno(void)
1256 {
1257   if (surf_network_model)
1258     return;
1259
1260   set_update_mechanism();
1261   surf_network_model_init_internal();
1262   net_define_callbacks();
1263
1264   xbt_dynar_push(model_list, &surf_network_model);
1265   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
1266                                     func_reno_fpi);
1267   network_solve = lagrange_solve;
1268
1269   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1270   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1271                             0.92);
1272   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1273 }
1274
1275
1276 void surf_network_model_init_Reno2(void)
1277 {
1278   if (surf_network_model)
1279     return;
1280
1281   set_update_mechanism();
1282   surf_network_model_init_internal();
1283   net_define_callbacks();
1284
1285   xbt_dynar_push(model_list, &surf_network_model);
1286   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
1287                                     func_reno2_fpi);
1288   network_solve = lagrange_solve;
1289
1290   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1291   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1292                             0.92);
1293   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S_parameter",
1294                             8775);
1295 }
1296
1297 void surf_network_model_init_Vegas(void)
1298 {
1299   if (surf_network_model)
1300     return;
1301
1302   set_update_mechanism();
1303   surf_network_model_init_internal();
1304   net_define_callbacks();
1305
1306   xbt_dynar_push(model_list, &surf_network_model);
1307   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
1308                                     func_vegas_fpi);
1309   network_solve = lagrange_solve;
1310
1311   xbt_cfg_setdefault_double(_surf_cfg_set, "network/latency_factor", 10.4);
1312   xbt_cfg_setdefault_double(_surf_cfg_set, "network/bandwidth_factor",
1313                             0.92);
1314   xbt_cfg_setdefault_double(_surf_cfg_set, "network/weight_S", 8775);
1315 }