src/surf/network_cm02.cpp

   1 #include "network_cm02.hpp"
   2 #include "maxmin_private.hpp"
   3 #include "simgrid/sg_config.h"
   4
   5 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
   6
   7 double sg_sender_gap = 0.0;
   8 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
   9 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  10 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  11
  12 double sg_tcp_gamma = 0.0;
  13 int sg_network_crosstraffic = 0;
  14
  15 /*************
  16  * CallBacks *
  17  *************/
  18
  19 static void net_parse_link_init(sg_platf_link_cbarg_t link){
  20   if (link->policy == SURF_LINK_FULLDUPLEX) {
  21     char *link_id;
  22     link_id = bprintf("%s_UP", link->id);
  23     surf_network_model->createResource(link_id,
  24                       link->bandwidth,
  25                       link->bandwidth_trace,
  26                       link->latency,
  27                       link->latency_trace,
  28                       link->state,
  29                       link->state_trace, link->policy, link->properties);
  30     xbt_free(link_id);
  31     link_id = bprintf("%s_DOWN", link->id);
  32     surf_network_model->createResource(link_id,
  33                       link->bandwidth,
  34                       link->bandwidth_trace,
  35                       link->latency,
  36                       link->latency_trace,
  37                       link->state,
  38                       link->state_trace, link->policy, link->properties);
  39     xbt_free(link_id);
  40   } else {
  41         surf_network_model->createResource(link->id,
  42                       link->bandwidth,
  43                       link->bandwidth_trace,
  44                       link->latency,
  45                       link->latency_trace,
  46                       link->state,
  47                       link->state_trace, link->policy, link->properties);
  48   }
  49 }
  50
  51 static void net_add_traces(void){
  52   xbt_dict_cursor_t cursor = NULL;
  53   char *trace_name, *elm;
  54
  55   static int called = 0;
  56   if (called)
  57     return;
  58   called = 1;
  59
  60   /* connect all traces relative to network */
  61   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
  62     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  63     NetworkCm02LinkPtr link = dynamic_cast<NetworkCm02LinkPtr>(
  64                                      static_cast<ResourcePtr>(
  65                                                   xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  66
  67     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  68                trace_name, elm);
  69     xbt_assert(trace,
  70                "Cannot connect trace %s to link %s: trace undefined",
  71                trace_name, elm);
  72
  73     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  74   }
  75
  76   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
  77     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  78     NetworkCm02LinkPtr link = dynamic_cast<NetworkCm02LinkPtr>(
  79                                  static_cast<ResourcePtr>(
  80                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  81
  82     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  83                trace_name, elm);
  84     xbt_assert(trace,
  85                "Cannot connect trace %s to link %s: trace undefined",
  86                trace_name, elm);
  87
  88     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  89   }
  90
  91   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
  92     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  93     NetworkCm02LinkPtr link = dynamic_cast<NetworkCm02LinkPtr>(
  94                                  static_cast<ResourcePtr>(
  95                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  96
  97     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  98                trace_name, elm);
  99     xbt_assert(trace,
 100                "Cannot connect trace %s to link %s: trace undefined",
 101                trace_name, elm);
 102
 103     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
 104   }
 105 }
 106
 107 void net_define_callbacks(void)
 108 {
 109   /* Figuring out the network links */
 110   sg_platf_link_add_cb(net_parse_link_init);
 111   sg_platf_postparse_add_cb(net_add_traces);
 112 }
 113
 114 /*********
 115  * Model *
 116  *********/
 117
 118 /************************************************************************/
 119 /* New model based on optimizations discussed during Pedro Velho's thesis*/
 120 /************************************************************************/
 121 /* @techreport{VELHO:2011:HAL-00646896:1, */
 122 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
 123 /*      title = {{Flow-level network models: have we reached the limits?}}, */
 124 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
 125 /*      type = {Rapport de recherche}, */
 126 /*      institution = {INRIA}, */
 127 /*      number = {RR-7821}, */
 128 /*      year = {2011}, */
 129 /*      month = Nov, */
 130 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
 131 /*  } */
 132 void surf_network_model_init_LegrandVelho(void)
 133 {
 134   if (surf_network_model)
 135     return;
 136
 137   surf_network_model = new NetworkCm02Model();
 138   net_define_callbacks();
 139   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 140   xbt_dynar_push(model_list, &model);
 141
 142   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
 143                             13.01);
 144   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 145                             0.97);
 146   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
 147 }
 148
 149 /***************************************************************************/
 150 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 151 /***************************************************************************/
 152 /* @TechReport{      rr-lip2002-40, */
 153 /*   author        = {Henri Casanova and Loris Marchal}, */
 154 /*   institution   = {LIP}, */
 155 /*   title         = {A Network Model for Simulation of Grid Application}, */
 156 /*   number        = {2002-40}, */
 157 /*   month         = {oct}, */
 158 /*   year          = {2002} */
 159 /* } */
 160 void surf_network_model_init_CM02(void)
 161 {
 162
 163   if (surf_network_model)
 164     return;
 165
 166   surf_network_model = new NetworkCm02Model();
 167   net_define_callbacks();
 168   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 169   xbt_dynar_push(model_list, &model);
 170
 171   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
 172   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 173                             1.0);
 174   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
 175 }
 176
 177 /***************************************************************************/
 178 /* The models from Steven H. Low                                           */
 179 /***************************************************************************/
 180 /* @article{Low03,                                                         */
 181 /*   author={Steven H. Low},                                               */
 182 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 183 /*   year={2003},                                                          */
 184 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 185 /*    volume={11}, number={4},                                             */
 186 /*  }                                                                      */
 187 void surf_network_model_init_Reno(void)
 188 {
 189   if (surf_network_model)
 190     return;
 191
 192   surf_network_model = new NetworkCm02Model();
 193   net_define_callbacks();
 194   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 195   xbt_dynar_push(model_list, &model);
 196   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 197                                     func_reno_fpi);
 198   surf_network_model->f_networkSolve = lagrange_solve;
 199
 200   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 201   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 202                             0.92);
 203   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 204 }
 205
 206
 207 void surf_network_model_init_Reno2(void)
 208 {
 209   if (surf_network_model)
 210     return;
 211
 212   surf_network_model = new NetworkCm02Model();
 213   net_define_callbacks();
 214   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 215   xbt_dynar_push(model_list, &model);
 216   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 217                                     func_reno2_fpi);
 218   surf_network_model->f_networkSolve = lagrange_solve;
 219
 220   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 221   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 222                             0.92);
 223   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S_parameter",
 224                             8775);
 225 }
 226
 227 void surf_network_model_init_Vegas(void)
 228 {
 229   if (surf_network_model)
 230     return;
 231
 232   surf_network_model = new NetworkCm02Model();
 233   net_define_callbacks();
 234   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 235   xbt_dynar_push(model_list, &model);
 236   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 237                                     func_vegas_fpi);
 238   surf_network_model->f_networkSolve = lagrange_solve;
 239
 240   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 241   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 242                             0.92);
 243   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 244 }
 245
 246 void NetworkCm02Model::initialize()
 247 {
 248   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 249   int select =
 250       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 251
 252   if (!strcmp(optim, "Full")) {
 253     p_updateMechanism = UM_FULL;
 254     m_selectiveUpdate = select;
 255   } else if (!strcmp(optim, "Lazy")) {
 256     p_updateMechanism = UM_LAZY;
 257     m_selectiveUpdate = 1;
 258     xbt_assert((select == 1)
 259                ||
 260                (xbt_cfg_is_default_value
 261                 (_sg_cfg_set, "network/maxmin_selective_update")),
 262                "Disabling selective update while using the lazy update mechanism is dumb!");
 263   } else {
 264     xbt_die("Unsupported optimization (%s) for this model", optim);
 265   }
 266
 267   if (!p_maxminSystem)
 268         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 269
 270   const char* lb_name = "__loopback__";
 271   routing_model_create(static_cast<ResourcePtr>(createResource(lb_name,
 272                                                    498000000, NULL, 0.000015, NULL,
 273                                                    SURF_RESOURCE_ON, NULL,
 274                                                    SURF_LINK_FATPIPE, NULL)));
 275
 276   if (p_updateMechanism == UM_LAZY) {
 277         p_actionHeap = xbt_heap_new(8, NULL);
 278         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 279         p_modifiedSet = new ActionLmmList();
 280         p_maxminSystem->keep_track = p_modifiedSet;
 281   }
 282
 283   m_haveGap = false;
 284 }
 285
 286 NetworkLinkPtr NetworkCm02Model::createResource(const char *name,
 287                                  double bw_initial,
 288                                  tmgr_trace_t bw_trace,
 289                                  double lat_initial,
 290                                  tmgr_trace_t lat_trace,
 291                                  e_surf_resource_state_t state_initial,
 292                                  tmgr_trace_t state_trace,
 293                                  e_surf_link_sharing_policy_t policy,
 294                                  xbt_dict_t properties)
 295 {
 296   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 297              "Link '%s' declared several times in the platform file.",
 298              name);
 299
 300   NetworkCm02LinkPtr nw_link =
 301                   new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 302                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 303
 304
 305   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, static_cast<ResourcePtr>(nw_link));
 306   XBT_DEBUG("Create link '%s'",name);
 307
 308   return nw_link;
 309 }
 310
 311 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 312 {
 313   NetworkCm02ActionPtr action;
 314   while ((xbt_heap_size(p_actionHeap) > 0)
 315          && (double_equals(xbt_heap_maxkey(p_actionHeap), now))) {
 316     action = (NetworkCm02ActionPtr) xbt_heap_pop(p_actionHeap);
 317     XBT_DEBUG("Something happened to action %p", action);
 318 #ifdef HAVE_TRACING
 319     if (TRACE_is_enabled()) {
 320       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 321       int i;
 322       for (i = 0; i < n; i++){
 323         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 324                                                             action->getVariable(),
 325                                                             i);
 326         NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 327         TRACE_surf_link_set_utilization(link->getName(),
 328                                         action->getCategory(),
 329                                         (lmm_variable_getvalue(action->getVariable())*
 330                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 331                                                 action->getVariable(),
 332                                                 i)),
 333                                         action->getLastUpdate(),
 334                                         now - action->getLastUpdate());
 335       }
 336     }
 337 #endif
 338
 339     // if I am wearing a latency hat
 340     if (action->getHat() == LATENCY) {
 341       XBT_DEBUG("Latency paid for action %p. Activating", action);
 342       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 343       action->heapRemove(p_actionHeap);
 344       action->refreshLastUpdate();
 345
 346         // if I am wearing a max_duration or normal hat
 347     } else if (action->getHat() == MAX_DURATION ||
 348         action->getHat() == NORMAL) {
 349         // no need to communicate anymore
 350         // assume that flows that reached max_duration have remaining of 0
 351       XBT_DEBUG("Action %p finished", action);
 352       action->setRemains(0);
 353       action->finish();
 354       action->setState(SURF_ACTION_DONE);
 355       action->heapRemove(p_actionHeap);
 356
 357       action->gapRemove();
 358     }
 359   }
 360   return;
 361 }
 362
 363 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 364                                                 double size, double rate)
 365 {
 366   unsigned int i;
 367   void *_link;
 368   NetworkCm02LinkPtr link;
 369   int failed = 0;
 370   NetworkCm02ActionPtr action = NULL;
 371   double bandwidth_bound;
 372   double latency = 0.0;
 373   xbt_dynar_t back_route = NULL;
 374   int constraints_per_variable = 0;
 375
 376   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 377
 378   XBT_IN("(%s,%s,%g,%g)", src->p_name, dst->p_name, size, rate);
 379
 380   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 381   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 382              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 383              src->p_name, dst->p_name);
 384
 385   xbt_dynar_foreach(route, i, _link) {
 386         link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 387     if (link->getState() == SURF_RESOURCE_OFF) {
 388       failed = 1;
 389       break;
 390     }
 391   }
 392   if (sg_network_crosstraffic == 1) {
 393           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 394     xbt_dynar_foreach(back_route, i, _link) {
 395       link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 396       if (link->getState() == SURF_RESOURCE_OFF) {
 397         failed = 1;
 398         break;
 399       }
 400     }
 401   }
 402
 403   action = new NetworkCm02Action(this, size, failed);
 404
 405 #ifdef HAVE_LATENCY_BOUND_TRACKING
 406   action->m_latencyLimited = 0;
 407 #endif
 408   action->m_weight = action->m_latency = latency;
 409
 410   action->m_rate = rate;
 411   if (p_updateMechanism == UM_LAZY) {
 412     action->m_indexHeap = -1;
 413     action->m_lastUpdate = surf_get_clock();
 414   }
 415
 416   bandwidth_bound = -1.0;
 417   if (sg_weight_S_parameter > 0) {
 418     xbt_dynar_foreach(route, i, _link) {
 419       link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 420       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 421     }
 422   }
 423   xbt_dynar_foreach(route, i, _link) {
 424         link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 425     double bb = bandwidthFactor(size) * link->getBandwidth(); //(link->p_power.peak * link->p_power.scale);
 426     bandwidth_bound =
 427         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 428   }
 429
 430   action->m_latCurrent = action->m_latency;
 431   action->m_latency *= latencyFactor(size);
 432   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 433   if (m_haveGap) {
 434     xbt_assert(!xbt_dynar_is_empty(route),
 435                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 436
 437     //link = *(NetworkCm02LinkPtr *) xbt_dynar_get_ptr(route, 0);
 438     link = dynamic_cast<NetworkCm02LinkPtr>(*static_cast<ResourcePtr *>(xbt_dynar_get_ptr(route, 0)));
 439     gapAppend(size, link, action);
 440     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 441               action, src->p_name, dst->p_name, action->m_senderGap,
 442               action->m_latency);
 443   }
 444
 445   constraints_per_variable = xbt_dynar_length(route);
 446   if (back_route != NULL)
 447     constraints_per_variable += xbt_dynar_length(back_route);
 448
 449   if (action->m_latency > 0) {
 450     action->p_variable = lmm_variable_new(p_maxminSystem, static_cast<ActionPtr>(action), 0.0, -1.0,
 451                          constraints_per_variable);
 452     if (p_updateMechanism == UM_LAZY) {
 453       // add to the heap the event when the latency is payed
 454       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 455                 action->m_latency + action->m_lastUpdate);
 456       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 457     }
 458   } else
 459     action->p_variable = lmm_variable_new(p_maxminSystem, static_cast<ActionPtr>(action), 1.0, -1.0, constraints_per_variable);
 460
 461   if (action->m_rate < 0) {
 462     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 463   } else {
 464     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);
 465   }
 466
 467   xbt_dynar_foreach(route, i, _link) {
 468         link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 469     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 470   }
 471
 472   if (sg_network_crosstraffic == 1) {
 473     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 474     xbt_dynar_foreach(back_route, i, _link) {
 475       link = dynamic_cast<NetworkCm02LinkPtr>(static_cast<ResourcePtr>(_link));
 476       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 477     }
 478   }
 479
 480   xbt_dynar_free(&route);
 481   XBT_OUT();
 482
 483   return action;
 484 }
 485
 486
 487
 488 /************
 489  * Resource *
 490  ************/
 491 NetworkCm02Link::NetworkCm02Link(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 492                                    lmm_system_t system,
 493                                    double constraint_value,
 494                                    tmgr_history_t history,
 495                                    e_surf_resource_state_t state_init,
 496                                    tmgr_trace_t state_trace,
 497                                    double metric_peak,
 498                                    tmgr_trace_t metric_trace,
 499                                    double lat_initial,
 500                                    tmgr_trace_t lat_trace,
 501                                    e_surf_link_sharing_policy_t policy)
 502 : NetworkLink(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 503 {
 504   m_stateCurrent = state_init;
 505
 506   p_power.scale = 1.0;
 507   p_power.peak = metric_peak;
 508   if (metric_trace)
 509     p_power.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 510   else
 511     p_power.event = NULL;
 512
 513   m_latCurrent = lat_initial;
 514   if (lat_trace)
 515         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 516
 517   if (policy == SURF_LINK_FATPIPE)
 518         lmm_constraint_shared(getConstraint());
 519 }
 520
 521
 522
 523 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 524                                       double value, double date)
 525 {
 526   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 527   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 528   /*     value, event_type); */
 529
 530   if (event_type == p_power.event) {
 531     double delta =
 532         sg_weight_S_parameter / value - sg_weight_S_parameter /
 533         (p_power.peak * p_power.scale);
 534     lmm_variable_t var = NULL;
 535     lmm_element_t elem = NULL;
 536     NetworkCm02ActionPtr action = NULL;
 537
 538     p_power.peak = value;
 539     lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 540                                     getConstraint(),
 541                                 sg_bandwidth_factor *
 542                                 (p_power.peak * p_power.scale));
 543 #ifdef HAVE_TRACING
 544     TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_power.peak * p_power.scale);
 545 #endif
 546     if (sg_weight_S_parameter > 0) {
 547       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 548         action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 549         action->m_weight += delta;
 550         if (!action->isSuspended())
 551           lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 552       }
 553     }
 554     if (tmgr_trace_event_free(event_type))
 555       p_power.event = NULL;
 556   } else if (event_type == p_latEvent) {
 557     double delta = value - m_latCurrent;
 558     lmm_variable_t var = NULL;
 559     lmm_element_t elem = NULL;
 560     NetworkCm02ActionPtr action = NULL;
 561
 562     m_latCurrent = value;
 563     while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 564       action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 565       action->m_latCurrent += delta;
 566       action->m_weight += delta;
 567       if (action->m_rate < 0)
 568         lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 569       else {
 570         lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 571                                   min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 572
 573         if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 574           XBT_INFO("Flow is limited BYBANDWIDTH");
 575         } else {
 576           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 577                    action->m_latCurrent);
 578         }
 579       }
 580       if (!action->isSuspended())
 581         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 582
 583     }
 584     if (tmgr_trace_event_free(event_type))
 585       p_latEvent = NULL;
 586   } else if (event_type == p_stateEvent) {
 587     if (value > 0)
 588       m_stateCurrent = SURF_RESOURCE_ON;
 589     else {
 590       lmm_constraint_t cnst = getConstraint();
 591       lmm_variable_t var = NULL;
 592       lmm_element_t elem = NULL;
 593
 594       m_stateCurrent = SURF_RESOURCE_OFF;
 595       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 596         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 597
 598         if (action->getState() == SURF_ACTION_RUNNING ||
 599             action->getState() == SURF_ACTION_READY) {
 600           action->setFinishTime(date);
 601           action->setState(SURF_ACTION_FAILED);
 602         }
 603       }
 604     }
 605     if (tmgr_trace_event_free(event_type))
 606       p_stateEvent = NULL;
 607   } else {
 608     XBT_CRITICAL("Unknown event ! \n");
 609     xbt_abort();
 610   }
 611
 612   XBT_DEBUG
 613       ("There were a resource state event, need to update actions related to the constraint (%p)",
 614        getConstraint());
 615   return;
 616 }
 617
 618 /**********
 619  * Action *
 620  **********/
 621 void NetworkCm02Action::updateRemainingLazy(double now)
 622 {
 623   double delta = 0.0;
 624
 625   if (m_suspended != 0)
 626     return;
 627
 628   delta = now - m_lastUpdate;
 629
 630   if (m_remains > 0) {
 631     XBT_DEBUG("Updating action(%p): remains was %lf, last_update was: %lf", this, m_remains, m_lastUpdate);
 632     double_update(&(m_remains), m_lastValue * delta);
 633
 634     XBT_DEBUG("Updating action(%p): remains is now %lf", this, m_remains);
 635   }
 636
 637   if (m_maxDuration != NO_MAX_DURATION)
 638     double_update(&m_maxDuration, delta);
 639
 640   if (m_remains <= 0 &&
 641       (lmm_get_variable_weight(getVariable()) > 0)) {
 642     finish();
 643     setState(SURF_ACTION_DONE);
 644
 645     heapRemove(getModel()->getActionHeap());
 646   } else if (((m_maxDuration != NO_MAX_DURATION)
 647       && (m_maxDuration <= 0))) {
 648     finish();
 649     setState(SURF_ACTION_DONE);
 650     heapRemove(getModel()->getActionHeap());
 651   }
 652
 653   m_lastUpdate = now;
 654   m_lastValue = lmm_variable_getvalue(getVariable());
 655 }
 656 void NetworkCm02Action::recycle()
 657 {
 658   return;
 659 }
 660