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