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