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