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 #include "src/surf/platform.hpp"
  13
  14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  15
  16 double sg_sender_gap = 0.0;
  17 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  18 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  19 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  20
  21 double sg_tcp_gamma = 0.0;
  22 int sg_network_crosstraffic = 0;
  23
  24 /*************
  25  * CallBacks *
  26  *************/
  27
  28 void net_define_callbacks(void)
  29 {
  30   /* Figuring out the network links */
  31   simgrid::surf::on_link.connect(netlink_parse_init);
  32   simgrid::surf::on_postparse.connect(net_add_traces);
  33 }
  34
  35 /*********
  36  * Model *
  37  *********/
  38
  39 /************************************************************************/
  40 /* New model based on optimizations discussed during Pedro Velho's thesis*/
  41 /************************************************************************/
  42 /* @techreport{VELHO:2011:HAL-00646896:1, */
  43 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
  44 /*      title = {{Flow-level network models: have we reached the limits?}}, */
  45 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
  46 /*      type = {Rapport de recherche}, */
  47 /*      institution = {INRIA}, */
  48 /*      number = {RR-7821}, */
  49 /*      year = {2011}, */
  50 /*      month = Nov, */
  51 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
  52 /*  } */
  53 void surf_network_model_init_LegrandVelho(void)
  54 {
  55   if (surf_network_model)
  56     return;
  57
  58   surf_network_model = new simgrid::surf::NetworkCm02Model();
  59   net_define_callbacks();
  60   simgrid::surf::Model *model = surf_network_model;
  61   xbt_dynar_push(all_existing_models, &model);
  62
  63   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
  64                             13.01);
  65   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  66                             0.97);
  67   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
  68 }
  69
  70 /***************************************************************************/
  71 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
  72 /***************************************************************************/
  73 /* @TechReport{      rr-lip2002-40, */
  74 /*   author        = {Henri Casanova and Loris Marchal}, */
  75 /*   institution   = {LIP}, */
  76 /*   title         = {A Network Model for Simulation of Grid Application}, */
  77 /*   number        = {2002-40}, */
  78 /*   month         = {oct}, */
  79 /*   year          = {2002} */
  80 /* } */
  81 void surf_network_model_init_CM02(void)
  82 {
  83
  84   if (surf_network_model)
  85     return;
  86
  87   surf_network_model = new simgrid::surf::NetworkCm02Model();
  88   xbt_dynar_push(all_existing_models, &surf_network_model);
  89   net_define_callbacks();
  90
  91   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
  92   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 1.0);
  93   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
  94 }
  95
  96 /***************************************************************************/
  97 /* The models from Steven H. Low                                           */
  98 /***************************************************************************/
  99 /* @article{Low03,                                                         */
 100 /*   author={Steven H. Low},                                               */
 101 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 102 /*   year={2003},                                                          */
 103 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 104 /*    volume={11}, number={4},                                             */
 105 /*  }                                                                      */
 106 void surf_network_model_init_Reno(void)
 107 {
 108   if (surf_network_model)
 109     return;
 110
 111   surf_network_model = new simgrid::surf::NetworkCm02Model();
 112   xbt_dynar_push(all_existing_models, &surf_network_model);
 113   net_define_callbacks();
 114   lmm_set_default_protocol_function(func_reno_f, func_reno_fp, func_reno_fpi);
 115   surf_network_model->f_networkSolve = lagrange_solve;
 116
 117   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 118   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 119   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 120 }
 121
 122
 123 void surf_network_model_init_Reno2(void)
 124 {
 125   if (surf_network_model)
 126     return;
 127
 128   surf_network_model = new simgrid::surf::NetworkCm02Model();
 129   xbt_dynar_push(all_existing_models, &surf_network_model);
 130   net_define_callbacks();
 131   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp, func_reno2_fpi);
 132   surf_network_model->f_networkSolve = lagrange_solve;
 133
 134   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 135   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 136   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 137 }
 138
 139 void surf_network_model_init_Vegas(void)
 140 {
 141   if (surf_network_model)
 142     return;
 143
 144   surf_network_model = new simgrid::surf::NetworkCm02Model();
 145   xbt_dynar_push(all_existing_models, &surf_network_model);
 146   net_define_callbacks();
 147   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp, func_vegas_fpi);
 148   surf_network_model->f_networkSolve = lagrange_solve;
 149
 150   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 151   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor", 0.92);
 152   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 153 }
 154
 155 namespace simgrid {
 156 namespace surf {
 157
 158 NetworkCm02Model::NetworkCm02Model()
 159         :NetworkModel()
 160 {
 161   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 162   int select =
 163       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 164
 165   if (!strcmp(optim, "Full")) {
 166     p_updateMechanism = UM_FULL;
 167     m_selectiveUpdate = select;
 168   } else if (!strcmp(optim, "Lazy")) {
 169     p_updateMechanism = UM_LAZY;
 170     m_selectiveUpdate = 1;
 171     xbt_assert((select == 1)
 172                ||
 173                (xbt_cfg_is_default_value
 174                 (_sg_cfg_set, "network/maxmin_selective_update")),
 175                "Disabling selective update while using the lazy update mechanism is dumb!");
 176   } else {
 177     xbt_die("Unsupported optimization (%s) for this model", optim);
 178   }
 179
 180   if (!p_maxminSystem)
 181         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 182
 183   routing_model_create(createLink("__loopback__",
 184                                       498000000, NULL, 0.000015, NULL,
 185                                       1 /*SURF_RESOURCE_ON*/, NULL,
 186                                       SURF_LINK_FATPIPE, NULL));
 187
 188   if (p_updateMechanism == UM_LAZY) {
 189         p_actionHeap = xbt_heap_new(8, NULL);
 190         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 191         p_modifiedSet = new ActionLmmList();
 192         p_maxminSystem->keep_track = p_modifiedSet;
 193   }
 194 }
 195
 196 Link* NetworkCm02Model::createLink(const char *name,
 197                                  double bw_initial,
 198                                  tmgr_trace_t bw_trace,
 199                                  double lat_initial,
 200                                  tmgr_trace_t lat_trace,
 201                                  int initiallyOn,
 202                                  tmgr_trace_t state_trace,
 203                                  e_surf_link_sharing_policy_t policy,
 204                                  xbt_dict_t properties)
 205 {
 206   xbt_assert(NULL == Link::byName(name),
 207              "Link '%s' declared several times in the platform",
 208              name);
 209
 210   Link* link = new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 211                                              initiallyOn, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 212   Link::onCreation(link);
 213   return link;
 214 }
 215
 216 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 217 {
 218   NetworkCm02Action *action;
 219   while ((xbt_heap_size(p_actionHeap) > 0)
 220          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 221     action = static_cast<NetworkCm02Action*> (xbt_heap_pop(p_actionHeap));
 222     XBT_DEBUG("Something happened to action %p", action);
 223     if (TRACE_is_enabled()) {
 224       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 225       int i;
 226       for (i = 0; i < n; i++){
 227         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 228                                                             action->getVariable(),
 229                                                             i);
 230         NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 231         TRACE_surf_link_set_utilization(link->getName(),
 232                                         action->getCategory(),
 233                                         (lmm_variable_getvalue(action->getVariable())*
 234                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 235                                                 action->getVariable(),
 236                                                 i)),
 237                                         action->getLastUpdate(),
 238                                         now - action->getLastUpdate());
 239       }
 240     }
 241
 242     // if I am wearing a latency hat
 243     if (action->getHat() == LATENCY) {
 244       XBT_DEBUG("Latency paid for action %p. Activating", action);
 245       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 246       action->heapRemove(p_actionHeap);
 247       action->refreshLastUpdate();
 248
 249         // if I am wearing a max_duration or normal hat
 250     } else if (action->getHat() == MAX_DURATION ||
 251         action->getHat() == NORMAL) {
 252         // no need to communicate anymore
 253         // assume that flows that reached max_duration have remaining of 0
 254       XBT_DEBUG("Action %p finished", action);
 255       action->setRemains(0);
 256       action->finish();
 257       action->setState(SURF_ACTION_DONE);
 258       action->heapRemove(p_actionHeap);
 259
 260       action->gapRemove();
 261     }
 262   }
 263   return;
 264 }
 265
 266
 267 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 268 {
 269   NetworkCm02Action *action;
 270   ActionList *running_actions = getRunningActionSet();
 271
 272   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 273      ; it != itend ; it=itNext) {
 274         ++itNext;
 275
 276     action = static_cast<NetworkCm02Action*> (&*it);
 277     XBT_DEBUG("Something happened to action %p", action);
 278       double deltap = delta;
 279       if (action->m_latency > 0) {
 280         if (action->m_latency > deltap) {
 281           double_update(&(action->m_latency), deltap, sg_surf_precision);
 282           deltap = 0.0;
 283         } else {
 284           double_update(&(deltap), action->m_latency, sg_surf_precision);
 285           action->m_latency = 0.0;
 286         }
 287         if (action->m_latency == 0.0 && !(action->isSuspended()))
 288           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 289               action->m_weight);
 290       }
 291       if (TRACE_is_enabled()) {
 292         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 293         int i;
 294         for (i = 0; i < n; i++){
 295           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 296                                                             action->getVariable(),
 297                                                             i);
 298           NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 299           TRACE_surf_link_set_utilization(link->getName(),
 300                                         action->getCategory(),
 301                                         (lmm_variable_getvalue(action->getVariable())*
 302                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 303                                                 action->getVariable(),
 304                                                 i)),
 305                                         action->getLastUpdate(),
 306                                         now - action->getLastUpdate());
 307         }
 308       }
 309       if (!lmm_get_number_of_cnst_from_var
 310           (p_maxminSystem, action->getVariable())) {
 311         /* There is actually no link used, hence an infinite bandwidth.
 312          * This happens often when using models like vivaldi.
 313          * In such case, just make sure that the action completes immediately.
 314          */
 315         action->updateRemains(action->getRemains());
 316       }
 317     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 318
 319     if (action->getMaxDuration() != NO_MAX_DURATION)
 320       action->updateMaxDuration(delta);
 321
 322     if ((action->getRemains() <= 0) &&
 323         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 324       action->finish();
 325       action->setState(SURF_ACTION_DONE);
 326       action->gapRemove();
 327     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 328         && (action->getMaxDuration() <= 0))) {
 329       action->finish();
 330       action->setState(SURF_ACTION_DONE);
 331       action->gapRemove();
 332     }
 333   }
 334   return;
 335 }
 336
 337 Action *NetworkCm02Model::communicate(NetCard *src, NetCard *dst,
 338                                                 double size, double rate)
 339 {
 340   unsigned int i;
 341   void *_link;
 342   NetworkCm02Link *link;
 343   int failed = 0;
 344   NetworkCm02Action *action = NULL;
 345   double bandwidth_bound;
 346   double latency = 0.0;
 347   xbt_dynar_t back_route = NULL;
 348   int constraints_per_variable = 0;
 349
 350   xbt_dynar_t route = xbt_dynar_new(sizeof(NetCard*), NULL);
 351
 352   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 353
 354   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 355   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 356              "You're trying to send data from %s to %s but there is no connecting path between these two hosts.",
 357              src->getName(), dst->getName());
 358
 359   xbt_dynar_foreach(route, i, _link) {
 360         link = static_cast<NetworkCm02Link*>(_link);
 361     if (link->isOff()) {
 362       failed = 1;
 363       break;
 364     }
 365   }
 366   if (sg_network_crosstraffic == 1) {
 367           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 368     xbt_dynar_foreach(back_route, i, _link) {
 369       link = static_cast<NetworkCm02Link*>(_link);
 370       if (link->isOff()) {
 371         failed = 1;
 372         break;
 373       }
 374     }
 375   }
 376
 377   action = new NetworkCm02Action(this, size, failed);
 378
 379 #ifdef HAVE_LATENCY_BOUND_TRACKING
 380   action->m_latencyLimited = 0;
 381 #endif
 382   action->m_weight = action->m_latency = latency;
 383
 384   action->m_rate = rate;
 385   if (p_updateMechanism == UM_LAZY) {
 386     action->m_indexHeap = -1;
 387     action->m_lastUpdate = surf_get_clock();
 388   }
 389
 390   bandwidth_bound = -1.0;
 391   if (sg_weight_S_parameter > 0) {
 392     xbt_dynar_foreach(route, i, _link) {
 393       link = static_cast<NetworkCm02Link*>(_link);
 394       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 395     }
 396   }
 397   xbt_dynar_foreach(route, i, _link) {
 398         link = static_cast<NetworkCm02Link*>(_link);
 399     double bb = bandwidthFactor(size) * link->getBandwidth();
 400     bandwidth_bound =
 401         (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
 402   }
 403
 404   action->m_latCurrent = action->m_latency;
 405   action->m_latency *= latencyFactor(size);
 406   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 407   if (m_haveGap) {
 408     xbt_assert(!xbt_dynar_is_empty(route),
 409                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 410
 411     link = *static_cast<NetworkCm02Link **>(xbt_dynar_get_ptr(route, 0));
 412     gapAppend(size, link, action);
 413     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 414               action, src->getName(), dst->getName(), action->m_senderGap,
 415               action->m_latency);
 416   }
 417
 418   constraints_per_variable = xbt_dynar_length(route);
 419   if (back_route != NULL)
 420     constraints_per_variable += xbt_dynar_length(back_route);
 421
 422   if (action->m_latency > 0) {
 423     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 424                          constraints_per_variable);
 425     if (p_updateMechanism == UM_LAZY) {
 426       // add to the heap the event when the latency is payed
 427       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 428                 action->m_latency + action->m_lastUpdate);
 429       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 430     }
 431   } else
 432     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 433
 434   if (action->m_rate < 0) {
 435     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 436   } else {
 437     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);
 438   }
 439
 440   xbt_dynar_foreach(route, i, _link) {
 441         link = static_cast<NetworkCm02Link*>(_link);
 442     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 443   }
 444
 445   if (sg_network_crosstraffic == 1) {
 446     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 447     xbt_dynar_foreach(back_route, i, _link) {
 448       link = static_cast<NetworkCm02Link*>(_link);
 449       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 450     }
 451   }
 452
 453   xbt_dynar_free(&route);
 454   XBT_OUT();
 455
 456   networkCommunicateCallbacks(action, src, dst, size, rate);
 457   return action;
 458 }
 459
 460 void NetworkCm02Model::addTraces(){
 461   xbt_dict_cursor_t cursor = NULL;
 462   char *trace_name, *elm;
 463
 464   static int called = 0;
 465   if (called)
 466     return;
 467   called = 1;
 468
 469   /* connect all traces relative to network */
 470   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 471     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 472     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 473
 474     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 475                trace_name, elm);
 476     xbt_assert(trace,
 477                "Cannot connect trace %s to link %s: trace undefined",
 478                trace_name, elm);
 479
 480     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 481   }
 482
 483   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 484     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 485     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 486
 487     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 488                trace_name, elm);
 489     xbt_assert(trace,
 490                "Cannot connect trace %s to link %s: trace undefined",
 491                trace_name, elm);
 492
 493     link->p_speed.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 494   }
 495
 496   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 497     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 498     NetworkCm02Link *link = static_cast<NetworkCm02Link*>(Link::byName(elm));;
 499
 500     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 501                trace_name, elm);
 502     xbt_assert(trace,
 503                "Cannot connect trace %s to link %s: trace undefined",
 504                trace_name, elm);
 505
 506     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 507   }
 508 }
 509
 510 /************
 511  * Resource *
 512  ************/
 513 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model *model, const char *name, xbt_dict_t props,
 514                                    lmm_system_t system,
 515                                    double constraint_value,
 516                                    tmgr_history_t history,
 517                                    int initiallyOn,
 518                                    tmgr_trace_t state_trace,
 519                                    double metric_peak,
 520                                    tmgr_trace_t metric_trace,
 521                                    double lat_initial,
 522                                    tmgr_trace_t lat_trace,
 523                                    e_surf_link_sharing_policy_t policy)
 524 : Link(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 525 {
 526   if (initiallyOn)
 527     turnOn();
 528   else
 529     turnOff();
 530
 531   p_speed.scale = 1.0;
 532   p_speed.peak = metric_peak;
 533   if (metric_trace)
 534     p_speed.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 535   else
 536     p_speed.event = NULL;
 537
 538   m_latCurrent = lat_initial;
 539   if (lat_trace)
 540         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 541
 542   if (policy == SURF_LINK_FATPIPE)
 543         lmm_constraint_shared(getConstraint());
 544 }
 545
 546
 547
 548 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 549                                       double value, double date)
 550 {
 551   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 552   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 553   /*     value, event_type); */
 554
 555   if (event_type == p_speed.event) {
 556     updateBandwidth(value, date);
 557     if (tmgr_trace_event_free(event_type))
 558       p_speed.event = NULL;
 559   } else if (event_type == p_latEvent) {
 560     updateLatency(value, date);
 561     if (tmgr_trace_event_free(event_type))
 562       p_latEvent = NULL;
 563   } else if (event_type == p_stateEvent) {
 564     if (value > 0)
 565       turnOn();
 566     else {
 567       lmm_constraint_t cnst = getConstraint();
 568       lmm_variable_t var = NULL;
 569       lmm_element_t elem = NULL;
 570
 571       turnOff();
 572       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 573         Action *action = static_cast<Action*>( lmm_variable_id(var) );
 574
 575         if (action->getState() == SURF_ACTION_RUNNING ||
 576             action->getState() == SURF_ACTION_READY) {
 577           action->setFinishTime(date);
 578           action->setState(SURF_ACTION_FAILED);
 579         }
 580       }
 581     }
 582     if (tmgr_trace_event_free(event_type))
 583       p_stateEvent = NULL;
 584   } else {
 585     XBT_CRITICAL("Unknown event ! \n");
 586     xbt_abort();
 587   }
 588
 589   XBT_DEBUG
 590       ("There were a resource state event, need to update actions related to the constraint (%p)",
 591        getConstraint());
 592   return;
 593 }
 594
 595 void NetworkCm02Link::updateBandwidth(double value, double date){
 596   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 597                  (p_speed.peak * p_speed.scale);
 598   lmm_variable_t var = NULL;
 599   lmm_element_t elem = NULL;
 600   lmm_element_t nextelem = NULL;
 601   int numelem = 0;
 602
 603   NetworkCm02Action *action = NULL;
 604
 605   p_speed.peak = value;
 606   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 607                               getConstraint(),
 608                               sg_bandwidth_factor *
 609                               (p_speed.peak * p_speed.scale));
 610   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_speed.peak * p_speed.scale);
 611   if (sg_weight_S_parameter > 0) {
 612     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 613       action = (NetworkCm02Action*) lmm_variable_id(var);
 614       action->m_weight += delta;
 615       if (!action->isSuspended())
 616         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 617     }
 618   }
 619 }
 620
 621 void NetworkCm02Link::updateLatency(double value, double date){
 622   double delta = value - m_latCurrent;
 623   lmm_variable_t var = NULL;
 624   lmm_element_t elem = NULL;
 625   lmm_element_t nextelem = NULL;
 626   int numelem = 0;
 627   NetworkCm02Action *action = NULL;
 628
 629   m_latCurrent = value;
 630   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 631     action = (NetworkCm02Action*) lmm_variable_id(var);
 632     action->m_latCurrent += delta;
 633     action->m_weight += delta;
 634     if (action->m_rate < 0)
 635       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 636     else {
 637       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 638                                 std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 639
 640       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 641         XBT_INFO("Flow is limited BYBANDWIDTH");
 642       } else {
 643         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 644                  action->m_latCurrent);
 645       }
 646     }
 647     if (!action->isSuspended())
 648       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 649   }
 650 }
 651
 652 /**********
 653  * Action *
 654  **********/
 655 void NetworkCm02Action::updateRemainingLazy(double now)
 656 {
 657   double delta = 0.0;
 658
 659   if (m_suspended != 0)
 660     return;
 661
 662   delta = now - m_lastUpdate;
 663
 664   if (m_remains > 0) {
 665     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 666     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 667
 668     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 669   }
 670
 671   if (m_maxDuration != NO_MAX_DURATION)
 672     double_update(&m_maxDuration, delta, sg_surf_precision);
 673
 674   if (m_remains <= 0 &&
 675       (lmm_get_variable_weight(getVariable()) > 0)) {
 676     finish();
 677     setState(SURF_ACTION_DONE);
 678
 679     heapRemove(getModel()->getActionHeap());
 680   } else if (((m_maxDuration != NO_MAX_DURATION)
 681       && (m_maxDuration <= 0))) {
 682     finish();
 683     setState(SURF_ACTION_DONE);
 684     heapRemove(getModel()->getActionHeap());
 685   }
 686
 687   m_lastUpdate = now;
 688   m_lastValue = lmm_variable_getvalue(getVariable());
 689 }
 690
 691 }
 692 }