src/surf/network_cm02.cpp

   1 /* Copyright (c) 2013-2014. 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 "network_cm02.hpp"
   8 #include "maxmin_private.hpp"
   9 #include "simgrid/sg_config.h"
  10
  11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  12
  13 double sg_sender_gap = 0.0;
  14 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  15 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  16 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  17
  18 double sg_tcp_gamma = 0.0;
  19 int sg_network_crosstraffic = 0;
  20
  21 /*************
  22  * CallBacks *
  23  *************/
  24
  25 void net_define_callbacks(void)
  26 {
  27   /* Figuring out the network links */
  28   sg_platf_link_add_cb(netlink_parse_init);
  29   sg_platf_postparse_add_cb(net_add_traces);
  30 }
  31
  32 /*********
  33  * Model *
  34  *********/
  35
  36 /************************************************************************/
  37 /* New model based on optimizations discussed during Pedro Velho's thesis*/
  38 /************************************************************************/
  39 /* @techreport{VELHO:2011:HAL-00646896:1, */
  40 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
  41 /*      title = {{Flow-level network models: have we reached the limits?}}, */
  42 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
  43 /*      type = {Rapport de recherche}, */
  44 /*      institution = {INRIA}, */
  45 /*      number = {RR-7821}, */
  46 /*      year = {2011}, */
  47 /*      month = Nov, */
  48 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
  49 /*  } */
  50 void surf_network_model_init_LegrandVelho(void)
  51 {
  52   if (surf_network_model)
  53     return;
  54
  55   surf_network_model = new NetworkCm02Model();
  56   net_define_callbacks();
  57   ModelPtr model = surf_network_model;
  58   xbt_dynar_push(model_list, &model);
  59
  60   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
  61                             13.01);
  62   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  63                             0.97);
  64   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
  65 }
  66
  67 /***************************************************************************/
  68 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
  69 /***************************************************************************/
  70 /* @TechReport{      rr-lip2002-40, */
  71 /*   author        = {Henri Casanova and Loris Marchal}, */
  72 /*   institution   = {LIP}, */
  73 /*   title         = {A Network Model for Simulation of Grid Application}, */
  74 /*   number        = {2002-40}, */
  75 /*   month         = {oct}, */
  76 /*   year          = {2002} */
  77 /* } */
  78 void surf_network_model_init_CM02(void)
  79 {
  80
  81   if (surf_network_model)
  82     return;
  83
  84   surf_network_model = new NetworkCm02Model();
  85   net_define_callbacks();
  86   ModelPtr model = surf_network_model;
  87   xbt_dynar_push(model_list, &model);
  88
  89   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
  90   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  91                             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 NetworkCm02Model();
 111   net_define_callbacks();
 112   ModelPtr model = surf_network_model;
 113   xbt_dynar_push(model_list, &model);
 114   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 115                                     func_reno_fpi);
 116   surf_network_model->f_networkSolve = lagrange_solve;
 117
 118   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 119   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 120                             0.92);
 121   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 122 }
 123
 124
 125 void surf_network_model_init_Reno2(void)
 126 {
 127   if (surf_network_model)
 128     return;
 129
 130   surf_network_model = new NetworkCm02Model();
 131   net_define_callbacks();
 132   ModelPtr model = surf_network_model;
 133   xbt_dynar_push(model_list, &model);
 134   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 135                                     func_reno2_fpi);
 136   surf_network_model->f_networkSolve = lagrange_solve;
 137
 138   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 139   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 140                             0.92);
 141   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S",
 142                             8775);
 143 }
 144
 145 void surf_network_model_init_Vegas(void)
 146 {
 147   if (surf_network_model)
 148     return;
 149
 150   surf_network_model = new NetworkCm02Model();
 151   net_define_callbacks();
 152   ModelPtr model = surf_network_model;
 153   xbt_dynar_push(model_list, &model);
 154   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 155                                     func_vegas_fpi);
 156   surf_network_model->f_networkSolve = lagrange_solve;
 157
 158   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 159   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 160                             0.92);
 161   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 162 }
 163
 164 void NetworkCm02Model::initialize()
 165 {
 166   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 167   int select =
 168       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 169
 170   if (!strcmp(optim, "Full")) {
 171     p_updateMechanism = UM_FULL;
 172     m_selectiveUpdate = select;
 173   } else if (!strcmp(optim, "Lazy")) {
 174     p_updateMechanism = UM_LAZY;
 175     m_selectiveUpdate = 1;
 176     xbt_assert((select == 1)
 177                ||
 178                (xbt_cfg_is_default_value
 179                 (_sg_cfg_set, "network/maxmin_selective_update")),
 180                "Disabling selective update while using the lazy update mechanism is dumb!");
 181   } else {
 182     xbt_die("Unsupported optimization (%s) for this model", optim);
 183   }
 184
 185   if (!p_maxminSystem)
 186         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 187
 188   routing_model_create(createLink("__loopback__",
 189                                       498000000, NULL, 0.000015, NULL,
 190                                       SURF_RESOURCE_ON, NULL,
 191                                       SURF_LINK_FATPIPE, NULL));
 192
 193   if (p_updateMechanism == UM_LAZY) {
 194         p_actionHeap = xbt_heap_new(8, NULL);
 195         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 196         p_modifiedSet = new ActionLmmList();
 197         p_maxminSystem->keep_track = p_modifiedSet;
 198   }
 199
 200   m_haveGap = false;
 201 }
 202
 203 Link* NetworkCm02Model::createLink(const char *name,
 204                                  double bw_initial,
 205                                  tmgr_trace_t bw_trace,
 206                                  double lat_initial,
 207                                  tmgr_trace_t lat_trace,
 208                                  e_surf_resource_state_t state_initial,
 209                                  tmgr_trace_t state_trace,
 210                                  e_surf_link_sharing_policy_t policy,
 211                                  xbt_dict_t properties)
 212 {
 213   xbt_assert(NULL == Link::byName(name),
 214              "Link '%s' declared several times in the platform",
 215              name);
 216
 217   return new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 218                                              state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 219 }
 220
 221 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 222 {
 223   NetworkCm02ActionPtr action;
 224   while ((xbt_heap_size(p_actionHeap) > 0)
 225          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 226     action = (NetworkCm02ActionPtr) xbt_heap_pop(p_actionHeap);
 227     XBT_DEBUG("Something happened to action %p", action);
 228     if (TRACE_is_enabled()) {
 229       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 230       int i;
 231       for (i = 0; i < n; i++){
 232         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 233                                                             action->getVariable(),
 234                                                             i);
 235         NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 236         TRACE_surf_link_set_utilization(link->getName(),
 237                                         action->getCategory(),
 238                                         (lmm_variable_getvalue(action->getVariable())*
 239                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 240                                                 action->getVariable(),
 241                                                 i)),
 242                                         action->getLastUpdate(),
 243                                         now - action->getLastUpdate());
 244       }
 245     }
 246
 247     // if I am wearing a latency hat
 248     if (action->getHat() == LATENCY) {
 249       XBT_DEBUG("Latency paid for action %p. Activating", action);
 250       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 251       action->heapRemove(p_actionHeap);
 252       action->refreshLastUpdate();
 253
 254         // if I am wearing a max_duration or normal hat
 255     } else if (action->getHat() == MAX_DURATION ||
 256         action->getHat() == NORMAL) {
 257         // no need to communicate anymore
 258         // assume that flows that reached max_duration have remaining of 0
 259       XBT_DEBUG("Action %p finished", action);
 260       action->setRemains(0);
 261       action->finish();
 262       action->setState(SURF_ACTION_DONE);
 263       action->heapRemove(p_actionHeap);
 264
 265       action->gapRemove();
 266     }
 267   }
 268   return;
 269 }
 270
 271
 272 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 273 {
 274   NetworkCm02ActionPtr action;
 275   ActionListPtr running_actions = getRunningActionSet();
 276
 277   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 278      ; it != itend ; it=itNext) {
 279         ++itNext;
 280
 281     action = (NetworkCm02ActionPtr) &*it;
 282     XBT_DEBUG("Something happened to action %p", action);
 283       double deltap = delta;
 284       if (action->m_latency > 0) {
 285         if (action->m_latency > deltap) {
 286           double_update(&(action->m_latency), deltap, sg_surf_precision);
 287           deltap = 0.0;
 288         } else {
 289           double_update(&(deltap), action->m_latency, sg_surf_precision);
 290           action->m_latency = 0.0;
 291         }
 292         if (action->m_latency == 0.0 && !(action->isSuspended()))
 293           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 294               action->m_weight);
 295       }
 296       if (TRACE_is_enabled()) {
 297         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 298         int i;
 299         for (i = 0; i < n; i++){
 300           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 301                                                             action->getVariable(),
 302                                                             i);
 303           NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 304           TRACE_surf_link_set_utilization(link->getName(),
 305                                         action->getCategory(),
 306                                         (lmm_variable_getvalue(action->getVariable())*
 307                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 308                                                 action->getVariable(),
 309                                                 i)),
 310                                         action->getLastUpdate(),
 311                                         now - action->getLastUpdate());
 312         }
 313       }
 314       if (!lmm_get_number_of_cnst_from_var
 315           (p_maxminSystem, action->getVariable())) {
 316         /* There is actually no link used, hence an infinite bandwidth.
 317          * This happens often when using models like vivaldi.
 318          * In such case, just make sure that the action completes immediately.
 319          */
 320         action->updateRemains(action->getRemains());
 321       }
 322     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 323
 324     if (action->getMaxDuration() != NO_MAX_DURATION)
 325       action->updateMaxDuration(delta);
 326
 327     if ((action->getRemains() <= 0) &&
 328         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 329       action->finish();
 330       action->setState(SURF_ACTION_DONE);
 331       action->gapRemove();
 332     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 333         && (action->getMaxDuration() <= 0))) {
 334       action->finish();
 335       action->setState(SURF_ACTION_DONE);
 336       action->gapRemove();
 337     }
 338   }
 339   return;
 340 }
 341
 342 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 343                                                 double size, double rate)
 344 {
 345   unsigned int i;
 346   void *_link;
 347   NetworkCm02Link *link;
 348   int failed = 0;
 349   NetworkCm02ActionPtr action = NULL;
 350   double bandwidth_bound;
 351   double latency = 0.0;
 352   xbt_dynar_t back_route = NULL;
 353   int constraints_per_variable = 0;
 354
 355   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 356
 357   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 358
 359   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 360   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 361              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 362              src->getName(), dst->getName());
 363
 364   xbt_dynar_foreach(route, i, _link) {
 365         link = static_cast<NetworkCm02Link*>(_link);
 366     if (link->getState() == SURF_RESOURCE_OFF) {
 367       failed = 1;
 368       break;
 369     }
 370   }
 371   if (sg_network_crosstraffic == 1) {
 372           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 373     xbt_dynar_foreach(back_route, i, _link) {
 374       link = static_cast<NetworkCm02Link*>(_link);
 375       if (link->getState() == SURF_RESOURCE_OFF) {
 376         failed = 1;
 377         break;
 378       }
 379     }
 380   }
 381
 382   action = new NetworkCm02Action(this, size, failed);
 383
 384 #ifdef HAVE_LATENCY_BOUND_TRACKING
 385   action->m_latencyLimited = 0;
 386 #endif
 387   action->m_weight = action->m_latency = latency;
 388
 389   action->m_rate = rate;
 390   if (p_updateMechanism == UM_LAZY) {
 391     action->m_indexHeap = -1;
 392     action->m_lastUpdate = surf_get_clock();
 393   }
 394
 395   bandwidth_bound = -1.0;
 396   if (sg_weight_S_parameter > 0) {
 397     xbt_dynar_foreach(route, i, _link) {
 398       link = static_cast<NetworkCm02Link*>(_link);
 399       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 400     }
 401   }
 402   xbt_dynar_foreach(route, i, _link) {
 403         link = static_cast<NetworkCm02Link*>(_link);
 404     double bb = bandwidthFactor(size) * link->getBandwidth(); //(link->p_power.peak * link->p_power.scale);
 405     bandwidth_bound =
 406         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 407   }
 408
 409   action->m_latCurrent = action->m_latency;
 410   action->m_latency *= latencyFactor(size);
 411   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 412   if (m_haveGap) {
 413     xbt_assert(!xbt_dynar_is_empty(route),
 414                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 415
 416     link = *static_cast<NetworkCm02Link **>(xbt_dynar_get_ptr(route, 0));
 417     gapAppend(size, link, action);
 418     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 419               action, src->getName(), dst->getName(), action->m_senderGap,
 420               action->m_latency);
 421   }
 422
 423   constraints_per_variable = xbt_dynar_length(route);
 424   if (back_route != NULL)
 425     constraints_per_variable += xbt_dynar_length(back_route);
 426
 427   if (action->m_latency > 0) {
 428     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 429                          constraints_per_variable);
 430     if (p_updateMechanism == UM_LAZY) {
 431       // add to the heap the event when the latency is payed
 432       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 433                 action->m_latency + action->m_lastUpdate);
 434       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 435     }
 436   } else
 437     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 438
 439   if (action->m_rate < 0) {
 440     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 441   } else {
 442     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)) : action->m_rate);
 443   }
 444
 445   xbt_dynar_foreach(route, i, _link) {
 446         link = static_cast<NetworkCm02Link*>(_link);
 447     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 448   }
 449
 450   if (sg_network_crosstraffic == 1) {
 451     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 452     xbt_dynar_foreach(back_route, i, _link) {
 453       link = static_cast<NetworkCm02Link*>(_link);
 454       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 455     }
 456   }
 457
 458   xbt_dynar_free(&route);
 459   XBT_OUT();
 460
 461   surf_callback_emit(networkCommunicateCallbacks, action, src, dst, size, rate);
 462   return action;
 463 }
 464
 465 void NetworkCm02Model::addTraces(){
 466   xbt_dict_cursor_t cursor = NULL;
 467   char *trace_name, *elm;
 468
 469   static int called = 0;
 470   if (called)
 471     return;
 472   called = 1;
 473
 474   /* connect all traces relative to network */
 475   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 476     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 477     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 478
 479     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 480                trace_name, elm);
 481     xbt_assert(trace,
 482                "Cannot connect trace %s to link %s: trace undefined",
 483                trace_name, elm);
 484
 485     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 486   }
 487
 488   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 489     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 490     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 491
 492     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 493                trace_name, elm);
 494     xbt_assert(trace,
 495                "Cannot connect trace %s to link %s: trace undefined",
 496                trace_name, elm);
 497
 498     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 499   }
 500
 501   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 502     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 503     NetworkCm02Link *link = static_cast<NetworkCm02Link*>(Link::byName(elm));;
 504
 505     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 506                trace_name, elm);
 507     xbt_assert(trace,
 508                "Cannot connect trace %s to link %s: trace undefined",
 509                trace_name, elm);
 510
 511     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 512   }
 513 }
 514
 515 /************
 516  * Resource *
 517  ************/
 518 NetworkCm02Link::NetworkCm02Link(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 519                                    lmm_system_t system,
 520                                    double constraint_value,
 521                                    tmgr_history_t history,
 522                                    e_surf_resource_state_t state_init,
 523                                    tmgr_trace_t state_trace,
 524                                    double metric_peak,
 525                                    tmgr_trace_t metric_trace,
 526                                    double lat_initial,
 527                                    tmgr_trace_t lat_trace,
 528                                    e_surf_link_sharing_policy_t policy)
 529 : Link(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 530 {
 531   setState(state_init);
 532
 533   p_power.scale = 1.0;
 534   p_power.peak = metric_peak;
 535   if (metric_trace)
 536     p_power.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 537   else
 538     p_power.event = NULL;
 539
 540   m_latCurrent = lat_initial;
 541   if (lat_trace)
 542         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 543
 544   if (policy == SURF_LINK_FATPIPE)
 545         lmm_constraint_shared(getConstraint());
 546 }
 547
 548
 549
 550 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 551                                       double value, double date)
 552 {
 553   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 554   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 555   /*     value, event_type); */
 556
 557   if (event_type == p_power.event) {
 558     updateBandwidth(value, date);
 559     if (tmgr_trace_event_free(event_type))
 560       p_power.event = NULL;
 561   } else if (event_type == p_latEvent) {
 562     updateLatency(value, date);
 563     if (tmgr_trace_event_free(event_type))
 564       p_latEvent = NULL;
 565   } else if (event_type == p_stateEvent) {
 566     if (value > 0)
 567       setState(SURF_RESOURCE_ON);
 568     else {
 569       lmm_constraint_t cnst = getConstraint();
 570       lmm_variable_t var = NULL;
 571       lmm_element_t elem = NULL;
 572
 573       setState(SURF_RESOURCE_OFF);
 574       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 575         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 576
 577         if (action->getState() == SURF_ACTION_RUNNING ||
 578             action->getState() == SURF_ACTION_READY) {
 579           action->setFinishTime(date);
 580           action->setState(SURF_ACTION_FAILED);
 581         }
 582       }
 583     }
 584     if (tmgr_trace_event_free(event_type))
 585       p_stateEvent = NULL;
 586   } else {
 587     XBT_CRITICAL("Unknown event ! \n");
 588     xbt_abort();
 589   }
 590
 591   XBT_DEBUG
 592       ("There were a resource state event, need to update actions related to the constraint (%p)",
 593        getConstraint());
 594   return;
 595 }
 596
 597 void NetworkCm02Link::updateBandwidth(double value, double date){
 598   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 599                  (p_power.peak * p_power.scale);
 600   lmm_variable_t var = NULL;
 601   lmm_element_t elem = NULL;
 602   lmm_element_t nextelem = NULL;
 603   int numelem = 0;
 604
 605   NetworkCm02ActionPtr action = NULL;
 606
 607   p_power.peak = value;
 608   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 609                               getConstraint(),
 610                               sg_bandwidth_factor *
 611                               (p_power.peak * p_power.scale));
 612   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_power.peak * p_power.scale);
 613   if (sg_weight_S_parameter > 0) {
 614     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 615       action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 616       action->m_weight += delta;
 617       if (!action->isSuspended())
 618         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 619     }
 620   }
 621 }
 622
 623 void NetworkCm02Link::updateLatency(double value, double date){
 624   double delta = value - m_latCurrent;
 625   lmm_variable_t var = NULL;
 626   lmm_element_t elem = NULL;
 627   lmm_element_t nextelem = NULL;
 628   int numelem = 0;
 629   NetworkCm02ActionPtr action = NULL;
 630
 631   m_latCurrent = value;
 632   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 633     action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 634     action->m_latCurrent += delta;
 635     action->m_weight += delta;
 636     if (action->m_rate < 0)
 637       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 638     else {
 639       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 640                                 min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 641
 642       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 643         XBT_INFO("Flow is limited BYBANDWIDTH");
 644       } else {
 645         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 646                  action->m_latCurrent);
 647       }
 648     }
 649     if (!action->isSuspended())
 650       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 651   }
 652 }
 653
 654 /**********
 655  * Action *
 656  **********/
 657 void NetworkCm02Action::updateRemainingLazy(double now)
 658 {
 659   double delta = 0.0;
 660
 661   if (m_suspended != 0)
 662     return;
 663
 664   delta = now - m_lastUpdate;
 665
 666   if (m_remains > 0) {
 667     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 668     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 669
 670     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 671   }
 672
 673   if (m_maxDuration != NO_MAX_DURATION)
 674     double_update(&m_maxDuration, delta, sg_surf_precision);
 675
 676   if (m_remains <= 0 &&
 677       (lmm_get_variable_weight(getVariable()) > 0)) {
 678     finish();
 679     setState(SURF_ACTION_DONE);
 680
 681     heapRemove(getModel()->getActionHeap());
 682   } else if (((m_maxDuration != NO_MAX_DURATION)
 683       && (m_maxDuration <= 0))) {
 684     finish();
 685     setState(SURF_ACTION_DONE);
 686     heapRemove(getModel()->getActionHeap());
 687   }
 688
 689   m_lastUpdate = now;
 690   m_lastValue = lmm_variable_getvalue(getVariable());
 691 }
 692 void NetworkCm02Action::recycle()
 693 {
 694   return;
 695 }
 696