src/surf/network_cm02.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include <algorithm>
   8
   9 #include "network_cm02.hpp"
  10 #include "maxmin_private.hpp"
  11 #include "simgrid/sg_config.h"
  12
  13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  14
  15 double sg_sender_gap = 0.0;
  16 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  17 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  18 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  19
  20 double sg_tcp_gamma = 0.0;
  21 int sg_network_crosstraffic = 0;
  22
  23 /*************
  24  * CallBacks *
  25  *************/
  26
  27 void net_define_callbacks(void)
  28 {
  29   /* Figuring out the network links */
  30   sg_platf_link_add_cb(netlink_parse_init);
  31   sg_platf_postparse_add_cb(net_add_traces);
  32 }
  33
  34 /*********
  35  * Model *
  36  *********/
  37
  38 /************************************************************************/
  39 /* New model based on optimizations discussed during Pedro Velho's thesis*/
  40 /************************************************************************/
  41 /* @techreport{VELHO:2011:HAL-00646896:1, */
  42 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
  43 /*      title = {{Flow-level network models: have we reached the limits?}}, */
  44 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
  45 /*      type = {Rapport de recherche}, */
  46 /*      institution = {INRIA}, */
  47 /*      number = {RR-7821}, */
  48 /*      year = {2011}, */
  49 /*      month = Nov, */
  50 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
  51 /*  } */
  52 void surf_network_model_init_LegrandVelho(void)
  53 {
  54   if (surf_network_model)
  55     return;
  56
  57   surf_network_model = new simgrid::surf::NetworkCm02Model();
  58   net_define_callbacks();
  59   simgrid::surf::Model *model = surf_network_model;
  60   xbt_dynar_push(all_existing_models, &model);
  61
  62   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
  63                             13.01);
  64   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  65                             0.97);
  66   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
  67 }
  68
  69 /***************************************************************************/
  70 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
  71 /***************************************************************************/
  72 /* @TechReport{      rr-lip2002-40, */
  73 /*   author        = {Henri Casanova and Loris Marchal}, */
  74 /*   institution   = {LIP}, */
  75 /*   title         = {A Network Model for Simulation of Grid Application}, */
  76 /*   number        = {2002-40}, */
  77 /*   month         = {oct}, */
  78 /*   year          = {2002} */
  79 /* } */
  80 void surf_network_model_init_CM02(void)
  81 {
  82
  83   if (surf_network_model)
  84     return;
  85
  86   surf_network_model = new simgrid::surf::NetworkCm02Model();
  87   xbt_dynar_push(all_existing_models, &surf_network_model);
  88   net_define_callbacks();
  89
  90   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
  91   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 1.0);
  92   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
  93 }
  94
  95 /***************************************************************************/
  96 /* The models from Steven H. Low                                           */
  97 /***************************************************************************/
  98 /* @article{Low03,                                                         */
  99 /*   author={Steven H. Low},                                               */
 100 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 101 /*   year={2003},                                                          */
 102 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 103 /*    volume={11}, number={4},                                             */
 104 /*  }                                                                      */
 105 void surf_network_model_init_Reno(void)
 106 {
 107   if (surf_network_model)
 108     return;
 109
 110   surf_network_model = new simgrid::surf::NetworkCm02Model();
 111   xbt_dynar_push(all_existing_models, &surf_network_model);
 112   net_define_callbacks();
 113   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 114   surf_network_model->f_networkSolve = lagrange_solve;
 115
 116   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 117   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 118   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 119 }
 120
 121
 122 void surf_network_model_init_Reno2(void)
 123 {
 124   if (surf_network_model)
 125     return;
 126
 127   surf_network_model = new simgrid::surf::NetworkCm02Model();
 128   xbt_dynar_push(all_existing_models, &surf_network_model);
 129   net_define_callbacks();
 130   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp, func_reno2_fpi);
 131   surf_network_model->f_networkSolve = lagrange_solve;
 132
 133   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 134   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 135   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 136 }
 137
 138 void surf_network_model_init_Vegas(void)
 139 {
 140   if (surf_network_model)
 141     return;
 142
 143   surf_network_model = new simgrid::surf::NetworkCm02Model();
 144   xbt_dynar_push(all_existing_models, &surf_network_model);
 145   net_define_callbacks();
 146   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp, func_vegas_fpi);
 147   surf_network_model->f_networkSolve = lagrange_solve;
 148
 149   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 150   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 151   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 152 }
 153
 154 namespace simgrid {
 155 namespace surf {
 156
 157 NetworkCm02Model::NetworkCm02Model()
 158         :NetworkModel()
 159 {
 160   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 161   int select =
 162       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 163
 164   if (!strcmp(optim, "Full")) {
 165     p_updateMechanism = UM_FULL;
 166     m_selectiveUpdate = select;
 167   } else if (!strcmp(optim, "Lazy")) {
 168     p_updateMechanism = UM_LAZY;
 169     m_selectiveUpdate = 1;
 170     xbt_assert((select == 1)
 171                ||
 172                (xbt_cfg_is_default_value
 173                 (_sg_cfg_set, "network/maxmin_selective_update")),
 174                "Disabling selective update while using the lazy update mechanism is dumb!");
 175   } else {
 176     xbt_die("Unsupported optimization (%s) for this model", optim);
 177   }
 178
 179   if (!p_maxminSystem)
 180         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 181
 182   routing_model_create(createLink("__loopback__",
 183                                       498000000, NULL, 0.000015, NULL,
 184                                       1 /*SURF_RESOURCE_ON*/, NULL,
 185                                       SURF_LINK_FATPIPE, NULL));
 186
 187   if (p_updateMechanism == UM_LAZY) {
 188         p_actionHeap = xbt_heap_new(8, NULL);
 189         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 190         p_modifiedSet = new ActionLmmList();
 191         p_maxminSystem->keep_track = p_modifiedSet;
 192   }
 193 }
 194
 195 Link* NetworkCm02Model::createLink(const char *name,
 196                                  double bw_initial,
 197                                  tmgr_trace_t bw_trace,
 198                                  double lat_initial,
 199                                  tmgr_trace_t lat_trace,
 200                                  int initiallyOn,
 201                                  tmgr_trace_t state_trace,
 202                                  e_surf_link_sharing_policy_t policy,
 203                                  xbt_dict_t properties)
 204 {
 205   xbt_assert(NULL == Link::byName(name),
 206              "Link '%s' declared several times in the platform",
 207              name);
 208
 209   Link* link = new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 210                                              initiallyOn, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 211   Link::onCreation(link);
 212   return link;
 213 }
 214
 215 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 216 {
 217   NetworkCm02Action *action;
 218   while ((xbt_heap_size(p_actionHeap) > 0)
 219          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 220     action = static_cast<NetworkCm02Action*> (xbt_heap_pop(p_actionHeap));
 221     XBT_DEBUG("Something happened to action %p", action);
 222     if (TRACE_is_enabled()) {
 223       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 224       int i;
 225       for (i = 0; i < n; i++){
 226         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 227                                                             action->getVariable(),
 228                                                             i);
 229         NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 230         TRACE_surf_link_set_utilization(link->getName(),
 231                                         action->getCategory(),
 232                                         (lmm_variable_getvalue(action->getVariable())*
 233                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 234                                                 action->getVariable(),
 235                                                 i)),
 236                                         action->getLastUpdate(),
 237                                         now - action->getLastUpdate());
 238       }
 239     }
 240
 241     // if I am wearing a latency hat
 242     if (action->getHat() == LATENCY) {
 243       XBT_DEBUG("Latency paid for action %p. Activating", action);
 244       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 245       action->heapRemove(p_actionHeap);
 246       action->refreshLastUpdate();
 247
 248         // if I am wearing a max_duration or normal hat
 249     } else if (action->getHat() == MAX_DURATION ||
 250         action->getHat() == NORMAL) {
 251         // no need to communicate anymore
 252         // assume that flows that reached max_duration have remaining of 0
 253       XBT_DEBUG("Action %p finished", action);
 254       action->setRemains(0);
 255       action->finish();
 256       action->setState(SURF_ACTION_DONE);
 257       action->heapRemove(p_actionHeap);
 258
 259       action->gapRemove();
 260     }
 261   }
 262   return;
 263 }
 264
 265
 266 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 267 {
 268   NetworkCm02Action *action;
 269   ActionList *running_actions = getRunningActionSet();
 270
 271   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 272      ; it != itend ; it=itNext) {
 273         ++itNext;
 274
 275     action = static_cast<NetworkCm02Action*> (&*it);
 276     XBT_DEBUG("Something happened to action %p", action);
 277       double deltap = delta;
 278       if (action->m_latency > 0) {
 279         if (action->m_latency > deltap) {
 280           double_update(&(action->m_latency), deltap, sg_surf_precision);
 281           deltap = 0.0;
 282         } else {
 283           double_update(&(deltap), action->m_latency, sg_surf_precision);
 284           action->m_latency = 0.0;
 285         }
 286         if (action->m_latency == 0.0 && !(action->isSuspended()))
 287           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 288               action->m_weight);
 289       }
 290       if (TRACE_is_enabled()) {
 291         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 292         int i;
 293         for (i = 0; i < n; i++){
 294           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 295                                                             action->getVariable(),
 296                                                             i);
 297           NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 298           TRACE_surf_link_set_utilization(link->getName(),
 299                                         action->getCategory(),
 300                                         (lmm_variable_getvalue(action->getVariable())*
 301                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 302                                                 action->getVariable(),
 303                                                 i)),
 304                                         action->getLastUpdate(),
 305                                         now - action->getLastUpdate());
 306         }
 307       }
 308       if (!lmm_get_number_of_cnst_from_var
 309           (p_maxminSystem, action->getVariable())) {
 310         /* There is actually no link used, hence an infinite bandwidth.
 311          * This happens often when using models like vivaldi.
 312          * In such case, just make sure that the action completes immediately.
 313          */
 314         action->updateRemains(action->getRemains());
 315       }
 316     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 317
 318     if (action->getMaxDuration() != NO_MAX_DURATION)
 319       action->updateMaxDuration(delta);
 320
 321     if ((action->getRemains() <= 0) &&
 322         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 323       action->finish();
 324       action->setState(SURF_ACTION_DONE);
 325       action->gapRemove();
 326     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 327         && (action->getMaxDuration() <= 0))) {
 328       action->finish();
 329       action->setState(SURF_ACTION_DONE);
 330       action->gapRemove();
 331     }
 332   }
 333   return;
 334 }
 335
 336 Action *NetworkCm02Model::communicate(NetCard *src, NetCard *dst,
 337                                                 double size, double rate)
 338 {
 339   unsigned int i;
 340   void *_link;
 341   NetworkCm02Link *link;
 342   int failed = 0;
 343   NetworkCm02Action *action = NULL;
 344   double bandwidth_bound;
 345   double latency = 0.0;
 346   xbt_dynar_t back_route = NULL;
 347   int constraints_per_variable = 0;
 348
 349   xbt_dynar_t route = xbt_dynar_new(sizeof(NetCard*), NULL);
 350
 351   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 352
 353   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 354   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 355              "You're trying to send data from %s to %s but there is no connecting path between these two hosts.",
 356              src->getName(), dst->getName());
 357
 358   xbt_dynar_foreach(route, i, _link) {
 359         link = static_cast<NetworkCm02Link*>(_link);
 360     if (link->isOff()) {
 361       failed = 1;
 362       break;
 363     }
 364   }
 365   if (sg_network_crosstraffic == 1) {
 366           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 367     xbt_dynar_foreach(back_route, i, _link) {
 368       link = static_cast<NetworkCm02Link*>(_link);
 369       if (link->isOff()) {
 370         failed = 1;
 371         break;
 372       }
 373     }
 374   }
 375
 376   action = new NetworkCm02Action(this, size, failed);
 377
 378 #ifdef HAVE_LATENCY_BOUND_TRACKING
 379   action->m_latencyLimited = 0;
 380 #endif
 381   action->m_weight = action->m_latency = latency;
 382
 383   action->m_rate = rate;
 384   if (p_updateMechanism == UM_LAZY) {
 385     action->m_indexHeap = -1;
 386     action->m_lastUpdate = surf_get_clock();
 387   }
 388
 389   bandwidth_bound = -1.0;
 390   if (sg_weight_S_parameter > 0) {
 391     xbt_dynar_foreach(route, i, _link) {
 392       link = static_cast<NetworkCm02Link*>(_link);
 393       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 394     }
 395   }
 396   xbt_dynar_foreach(route, i, _link) {
 397         link = static_cast<NetworkCm02Link*>(_link);
 398     double bb = bandwidthFactor(size) * link->getBandwidth();
 399     bandwidth_bound =
 400         (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
 401   }
 402
 403   action->m_latCurrent = action->m_latency;
 404   action->m_latency *= latencyFactor(size);
 405   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 406   if (m_haveGap) {
 407     xbt_assert(!xbt_dynar_is_empty(route),
 408                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 409
 410     link = *static_cast<NetworkCm02Link **>(xbt_dynar_get_ptr(route, 0));
 411     gapAppend(size, link, action);
 412     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 413               action, src->getName(), dst->getName(), action->m_senderGap,
 414               action->m_latency);
 415   }
 416
 417   constraints_per_variable = xbt_dynar_length(route);
 418   if (back_route != NULL)
 419     constraints_per_variable += xbt_dynar_length(back_route);
 420
 421   if (action->m_latency > 0) {
 422     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 423                          constraints_per_variable);
 424     if (p_updateMechanism == UM_LAZY) {
 425       // add to the heap the event when the latency is payed
 426       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 427                 action->m_latency + action->m_lastUpdate);
 428       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 429     }
 430   } else
 431     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 432
 433   if (action->m_rate < 0) {
 434     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 435   } else {
 436     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)) : action->m_rate);
 437   }
 438
 439   xbt_dynar_foreach(route, i, _link) {
 440         link = static_cast<NetworkCm02Link*>(_link);
 441     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 442   }
 443
 444   if (sg_network_crosstraffic == 1) {
 445     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 446     xbt_dynar_foreach(back_route, i, _link) {
 447       link = static_cast<NetworkCm02Link*>(_link);
 448       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 449     }
 450   }
 451
 452   xbt_dynar_free(&route);
 453   XBT_OUT();
 454
 455   networkCommunicateCallbacks(action, src, dst, size, rate);
 456   return action;
 457 }
 458
 459 void NetworkCm02Model::addTraces(){
 460   xbt_dict_cursor_t cursor = NULL;
 461   char *trace_name, *elm;
 462
 463   static int called = 0;
 464   if (called)
 465     return;
 466   called = 1;
 467
 468   /* connect all traces relative to network */
 469   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 470     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 471     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 472
 473     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 474                trace_name, elm);
 475     xbt_assert(trace,
 476                "Cannot connect trace %s to link %s: trace undefined",
 477                trace_name, elm);
 478
 479     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 480   }
 481
 482   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 483     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 484     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 485
 486     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 487                trace_name, elm);
 488     xbt_assert(trace,
 489                "Cannot connect trace %s to link %s: trace undefined",
 490                trace_name, elm);
 491
 492     link->p_speed.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 493   }
 494
 495   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 496     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 497     NetworkCm02Link *link = static_cast<NetworkCm02Link*>(Link::byName(elm));;
 498
 499     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 500                trace_name, elm);
 501     xbt_assert(trace,
 502                "Cannot connect trace %s to link %s: trace undefined",
 503                trace_name, elm);
 504
 505     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 506   }
 507 }
 508
 509 /************
 510  * Resource *
 511  ************/
 512 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model *model, const char *name, xbt_dict_t props,
 513                                    lmm_system_t system,
 514                                    double constraint_value,
 515                                    tmgr_history_t history,
 516                                    int initiallyOn,
 517                                    tmgr_trace_t state_trace,
 518                                    double metric_peak,
 519                                    tmgr_trace_t metric_trace,
 520                                    double lat_initial,
 521                                    tmgr_trace_t lat_trace,
 522                                    e_surf_link_sharing_policy_t policy)
 523 : Link(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 524 {
 525   if (initiallyOn)
 526     turnOn();
 527   else
 528     turnOff();
 529
 530   p_speed.scale = 1.0;
 531   p_speed.peak = metric_peak;
 532   if (metric_trace)
 533     p_speed.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 534   else
 535     p_speed.event = NULL;
 536
 537   m_latCurrent = lat_initial;
 538   if (lat_trace)
 539         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 540
 541   if (policy == SURF_LINK_FATPIPE)
 542         lmm_constraint_shared(getConstraint());
 543 }
 544
 545
 546
 547 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 548                                       double value, double date)
 549 {
 550   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 551   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 552   /*     value, event_type); */
 553
 554   if (event_type == p_speed.event) {
 555     updateBandwidth(value, date);
 556     if (tmgr_trace_event_free(event_type))
 557       p_speed.event = NULL;
 558   } else if (event_type == p_latEvent) {
 559     updateLatency(value, date);
 560     if (tmgr_trace_event_free(event_type))
 561       p_latEvent = NULL;
 562   } else if (event_type == p_stateEvent) {
 563     if (value > 0)
 564       turnOn();
 565     else {
 566       lmm_constraint_t cnst = getConstraint();
 567       lmm_variable_t var = NULL;
 568       lmm_element_t elem = NULL;
 569
 570       turnOff();
 571       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 572         Action *action = static_cast<Action*>( lmm_variable_id(var) );
 573
 574         if (action->getState() == SURF_ACTION_RUNNING ||
 575             action->getState() == SURF_ACTION_READY) {
 576           action->setFinishTime(date);
 577           action->setState(SURF_ACTION_FAILED);
 578         }
 579       }
 580     }
 581     if (tmgr_trace_event_free(event_type))
 582       p_stateEvent = NULL;
 583   } else {
 584     XBT_CRITICAL("Unknown event ! \n");
 585     xbt_abort();
 586   }
 587
 588   XBT_DEBUG
 589       ("There were a resource state event, need to update actions related to the constraint (%p)",
 590        getConstraint());
 591   return;
 592 }
 593
 594 void NetworkCm02Link::updateBandwidth(double value, double date){
 595   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 596                  (p_speed.peak * p_speed.scale);
 597   lmm_variable_t var = NULL;
 598   lmm_element_t elem = NULL;
 599   lmm_element_t nextelem = NULL;
 600   int numelem = 0;
 601
 602   NetworkCm02Action *action = NULL;
 603
 604   p_speed.peak = value;
 605   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 606                               getConstraint(),
 607                               sg_bandwidth_factor *
 608                               (p_speed.peak * p_speed.scale));
 609   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_speed.peak * p_speed.scale);
 610   if (sg_weight_S_parameter > 0) {
 611     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 612       action = (NetworkCm02Action*) lmm_variable_id(var);
 613       action->m_weight += delta;
 614       if (!action->isSuspended())
 615         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 616     }
 617   }
 618 }
 619
 620 void NetworkCm02Link::updateLatency(double value, double date){
 621   double delta = value - m_latCurrent;
 622   lmm_variable_t var = NULL;
 623   lmm_element_t elem = NULL;
 624   lmm_element_t nextelem = NULL;
 625   int numelem = 0;
 626   NetworkCm02Action *action = NULL;
 627
 628   m_latCurrent = value;
 629   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 630     action = (NetworkCm02Action*) lmm_variable_id(var);
 631     action->m_latCurrent += delta;
 632     action->m_weight += delta;
 633     if (action->m_rate < 0)
 634       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 635     else {
 636       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 637                                 std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 638
 639       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 640         XBT_INFO("Flow is limited BYBANDWIDTH");
 641       } else {
 642         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 643                  action->m_latCurrent);
 644       }
 645     }
 646     if (!action->isSuspended())
 647       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 648   }
 649 }
 650
 651 /**********
 652  * Action *
 653  **********/
 654 void NetworkCm02Action::updateRemainingLazy(double now)
 655 {
 656   double delta = 0.0;
 657
 658   if (m_suspended != 0)
 659     return;
 660
 661   delta = now - m_lastUpdate;
 662
 663   if (m_remains > 0) {
 664     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 665     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 666
 667     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 668   }
 669
 670   if (m_maxDuration != NO_MAX_DURATION)
 671     double_update(&m_maxDuration, delta, sg_surf_precision);
 672
 673   if (m_remains <= 0 &&
 674       (lmm_get_variable_weight(getVariable()) > 0)) {
 675     finish();
 676     setState(SURF_ACTION_DONE);
 677
 678     heapRemove(getModel()->getActionHeap());
 679   } else if (((m_maxDuration != NO_MAX_DURATION)
 680       && (m_maxDuration <= 0))) {
 681     finish();
 682     setState(SURF_ACTION_DONE);
 683     heapRemove(getModel()->getActionHeap());
 684   }
 685
 686   m_lastUpdate = now;
 687   m_lastValue = lmm_variable_getvalue(getVariable());
 688 }
 689
 690 }
 691 }