src/surf/network_cm02.cpp

   1 #include "network_cm02.hpp"
   2 #include "maxmin_private.h"
   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     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  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     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  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     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  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   ActionLmmPtr comm = NULL;
 249
 250   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 251   int select =
 252       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 253
 254   if (!strcmp(optim, "Full")) {
 255     p_updateMechanism = UM_FULL;
 256     m_selectiveUpdate = select;
 257   } else if (!strcmp(optim, "Lazy")) {
 258     p_updateMechanism = UM_LAZY;
 259     m_selectiveUpdate = 1;
 260     xbt_assert((select == 1)
 261                ||
 262                (xbt_cfg_is_default_value
 263                 (_sg_cfg_set, "network/maxmin_selective_update")),
 264                "Disabling selective update while using the lazy update mechanism is dumb!");
 265   } else {
 266     xbt_die("Unsupported optimization (%s) for this model", optim);
 267   }
 268
 269   if (!p_maxminSystem)
 270         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 271
 272   const char* lb_name = "__loopback__";
 273   routing_model_create(static_cast<ResourcePtr>(createResource(lb_name,
 274                                                    498000000, NULL, 0.000015, NULL,
 275                                                    SURF_RESOURCE_ON, NULL,
 276                                                    SURF_LINK_FATPIPE, NULL)));
 277
 278   if (p_updateMechanism == UM_LAZY) {
 279         p_actionHeap = xbt_heap_new(8, NULL);
 280         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 281         p_modifiedSet = xbt_swag_new(xbt_swag_offset(*comm, p_actionListHookup));
 282         p_maxminSystem->keep_track = p_modifiedSet;
 283   }
 284
 285   m_haveGap = false;
 286 }
 287
 288 NetworkLinkPtr NetworkCm02Model::createResource(const char *name,
 289                                  double bw_initial,
 290                                  tmgr_trace_t bw_trace,
 291                                  double lat_initial,
 292                                  tmgr_trace_t lat_trace,
 293                                  e_surf_resource_state_t state_initial,
 294                                  tmgr_trace_t state_trace,
 295                                  e_surf_link_sharing_policy_t policy,
 296                                  xbt_dict_t properties)
 297 {
 298   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 299              "Link '%s' declared several times in the platform file.",
 300              name);
 301
 302   NetworkCm02LinkLmmPtr nw_link =
 303                   new NetworkCm02LinkLmm(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 304                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 305
 306
 307   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, static_cast<ResourcePtr>(nw_link));
 308   XBT_DEBUG("Create link '%s'",name);
 309
 310   return nw_link;
 311 }
 312
 313 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 314 {
 315   NetworkCm02ActionLmmPtr action;
 316   while ((xbt_heap_size(p_actionHeap) > 0)
 317          && (double_equals(xbt_heap_maxkey(p_actionHeap), now))) {
 318     action = (NetworkCm02ActionLmmPtr) xbt_heap_pop(p_actionHeap);
 319     XBT_DEBUG("Something happened to action %p", action);
 320 #ifdef HAVE_TRACING
 321     if (TRACE_is_enabled()) {
 322       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->p_variable);
 323       int i;
 324       for (i = 0; i < n; i++){
 325         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 326                                                             action->p_variable,
 327                                                             i);
 328         NetworkCm02LinkLmmPtr link = static_cast<NetworkCm02LinkLmmPtr>(lmm_constraint_id(constraint));
 329         TRACE_surf_link_set_utilization(link->m_name,
 330                                         action->p_category,
 331                                         (lmm_variable_getvalue(action->p_variable)*
 332                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 333                                                 action->p_variable,
 334                                                 i)),
 335                                         action->m_lastUpdate,
 336                                         now - action->m_lastUpdate);
 337       }
 338     }
 339 #endif
 340
 341     // if I am wearing a latency hat
 342     if (action->m_hat == LATENCY) {
 343       XBT_DEBUG("Latency paid for action %p. Activating", action);
 344       lmm_update_variable_weight(p_maxminSystem, action->p_variable, action->m_weight);
 345       action->heapRemove(p_actionHeap);
 346       action->m_lastUpdate = surf_get_clock();
 347
 348         // if I am wearing a max_duration or normal hat
 349     } else if (action->m_hat == MAX_DURATION ||
 350         action->m_hat == NORMAL) {
 351         // no need to communicate anymore
 352         // assume that flows that reached max_duration have remaining of 0
 353       action->m_finish = surf_get_clock();
 354       XBT_DEBUG("Action %p finished", action);
 355       action->m_remains = 0;
 356       action->m_finish = surf_get_clock();
 357       action->setState(SURF_ACTION_DONE);
 358       action->heapRemove(p_actionHeap);
 359
 360       action->gapRemove();
 361     }
 362   }
 363   return;
 364 }
 365
 366 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 367                                                 double size, double rate)
 368 {
 369   unsigned int i;
 370   void *_link;
 371   NetworkCm02LinkLmmPtr link;
 372   int failed = 0;
 373   NetworkCm02ActionLmmPtr action = NULL;
 374   double bandwidth_bound;
 375   double latency = 0.0;
 376   xbt_dynar_t back_route = NULL;
 377   int constraints_per_variable = 0;
 378
 379   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 380
 381   XBT_IN("(%s,%s,%g,%g)", src->p_name, dst->p_name, size, rate);
 382
 383   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 384   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 385              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 386              src->p_name, dst->p_name);
 387
 388   xbt_dynar_foreach(route, i, _link) {
 389         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 390     if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 391       failed = 1;
 392       break;
 393     }
 394   }
 395   if (sg_network_crosstraffic == 1) {
 396           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 397     xbt_dynar_foreach(back_route, i, _link) {
 398       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 399       if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 400         failed = 1;
 401         break;
 402       }
 403     }
 404   }
 405
 406   action = new NetworkCm02ActionLmm(this, size, failed);
 407
 408 #ifdef HAVE_LATENCY_BOUND_TRACKING
 409   action->m_latencyLimited = 0;
 410 #endif
 411   action->m_weight = action->m_latency = latency;
 412
 413   //FIXME:REMOVxbt_swag_insert(action, action->p_stateSet);
 414   action->m_rate = rate;
 415   if (p_updateMechanism == UM_LAZY) {
 416     action->m_indexHeap = -1;
 417     action->m_lastUpdate = surf_get_clock();
 418   }
 419
 420   bandwidth_bound = -1.0;
 421   if (sg_weight_S_parameter > 0) {
 422     xbt_dynar_foreach(route, i, _link) {
 423       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 424       action->m_weight +=
 425          sg_weight_S_parameter /
 426          (link->p_power.peak * link->p_power.scale);
 427     }
 428   }
 429   xbt_dynar_foreach(route, i, _link) {
 430         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 431     double bb = bandwidthFactor(size) * (link->p_power.peak * link->p_power.scale);
 432     bandwidth_bound =
 433         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 434   }
 435
 436   action->m_latCurrent = action->m_latency;
 437   action->m_latency *= latencyFactor(size);
 438   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 439   if (m_haveGap) {
 440     xbt_assert(!xbt_dynar_is_empty(route),
 441                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 442
 443     //link = *(NetworkCm02LinkLmmPtr *) xbt_dynar_get_ptr(route, 0);
 444     link = dynamic_cast<NetworkCm02LinkLmmPtr>(*static_cast<ResourcePtr *>(xbt_dynar_get_ptr(route, 0)));
 445     gapAppend(size, link, action);
 446     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 447               action, src->p_name, dst->p_name, action->m_senderGap,
 448               action->m_latency);
 449   }
 450
 451   constraints_per_variable = xbt_dynar_length(route);
 452   if (back_route != NULL)
 453     constraints_per_variable += xbt_dynar_length(back_route);
 454
 455   if (action->m_latency > 0) {
 456     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 457                          constraints_per_variable);
 458     if (p_updateMechanism == UM_LAZY) {
 459       // add to the heap the event when the latency is payed
 460       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 461                 action->m_latency + action->m_lastUpdate);
 462       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 463     }
 464   } else
 465     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 466
 467   if (action->m_rate < 0) {
 468     lmm_update_variable_bound(p_maxminSystem, action->p_variable, (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 469   } else {
 470     lmm_update_variable_bound(p_maxminSystem, action->p_variable, (action->m_latCurrent > 0) ? min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)) : action->m_rate);
 471   }
 472
 473   xbt_dynar_foreach(route, i, _link) {
 474         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 475     lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, 1.0);
 476   }
 477
 478   if (sg_network_crosstraffic == 1) {
 479     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 480     xbt_dynar_foreach(back_route, i, _link) {
 481       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 482       lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, .05);
 483     }
 484   }
 485
 486   xbt_dynar_free(&route);
 487   XBT_OUT();
 488
 489   return action;
 490 }
 491
 492
 493
 494 /************
 495  * Resource *
 496  ************/
 497 NetworkCm02LinkLmm::NetworkCm02LinkLmm(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 498                                    lmm_system_t system,
 499                                    double constraint_value,
 500                                    tmgr_history_t history,
 501                                    e_surf_resource_state_t state_init,
 502                                    tmgr_trace_t state_trace,
 503                                    double metric_peak,
 504                                    tmgr_trace_t metric_trace,
 505                                    double lat_initial,
 506                                    tmgr_trace_t lat_trace,
 507                                    e_surf_link_sharing_policy_t policy)
 508 : Resource(model, name, props),
 509   NetworkLinkLmm(system, constraint_value, history, state_init, state_trace, metric_peak, metric_trace)
 510 {
 511   m_latCurrent = lat_initial;
 512   if (lat_trace)
 513         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 514
 515   if (policy == SURF_LINK_FATPIPE)
 516         lmm_constraint_shared(p_constraint);
 517 }
 518
 519
 520
 521 void NetworkCm02LinkLmm::updateState(tmgr_trace_event_t event_type,
 522                                       double value, double date)
 523 {
 524   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 525   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 526   /*     value, event_type); */
 527
 528   if (event_type == p_power.event) {
 529     double delta =
 530         sg_weight_S_parameter / value - sg_weight_S_parameter /
 531         (p_power.peak * p_power.scale);
 532     lmm_variable_t var = NULL;
 533     lmm_element_t elem = NULL;
 534     NetworkCm02ActionLmmPtr action = NULL;
 535
 536     p_power.peak = value;
 537     lmm_update_constraint_bound(p_model->p_maxminSystem,
 538                                 p_constraint,
 539                                 sg_bandwidth_factor *
 540                                 (p_power.peak * p_power.scale));
 541 #ifdef HAVE_TRACING
 542     TRACE_surf_link_set_bandwidth(date, m_name, sg_bandwidth_factor * p_power.peak * p_power.scale);
 543 #endif
 544     if (sg_weight_S_parameter > 0) {
 545       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 546         action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 547         action->m_weight += delta;
 548         if (!action->m_suspended)
 549           lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 550       }
 551     }
 552     if (tmgr_trace_event_free(event_type))
 553       p_power.event = NULL;
 554   } else if (event_type == p_latEvent) {
 555     double delta = value - m_latCurrent;
 556     lmm_variable_t var = NULL;
 557     lmm_element_t elem = NULL;
 558     NetworkCm02ActionLmmPtr action = NULL;
 559
 560     m_latCurrent = value;
 561     while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 562       action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 563       action->m_latCurrent += delta;
 564       action->m_weight += delta;
 565       if (action->m_rate < 0)
 566         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable, sg_tcp_gamma / (2.0 * action->m_latCurrent));
 567       else {
 568         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable,
 569                                   min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 570
 571         if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 572           XBT_INFO("Flow is limited BYBANDWIDTH");
 573         } else {
 574           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 575                    action->m_latCurrent);
 576         }
 577       }
 578       if (!action->m_suspended)
 579         lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 580
 581     }
 582     if (tmgr_trace_event_free(event_type))
 583       p_latEvent = NULL;
 584   } else if (event_type == p_stateEvent) {
 585     if (value > 0)
 586       p_stateCurrent = SURF_RESOURCE_ON;
 587     else {
 588       lmm_constraint_t cnst = p_constraint;
 589       lmm_variable_t var = NULL;
 590       lmm_element_t elem = NULL;
 591
 592       p_stateCurrent = SURF_RESOURCE_OFF;
 593       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, cnst, &elem))) {
 594         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 595
 596         if (action->getState() == SURF_ACTION_RUNNING ||
 597             action->getState() == SURF_ACTION_READY) {
 598           action->m_finish = date;
 599           action->setState(SURF_ACTION_FAILED);
 600         }
 601       }
 602     }
 603     if (tmgr_trace_event_free(event_type))
 604       p_stateEvent = NULL;
 605   } else {
 606     XBT_CRITICAL("Unknown event ! \n");
 607     xbt_abort();
 608   }
 609
 610   XBT_DEBUG
 611       ("There were a resource state event, need to update actions related to the constraint (%p)",
 612        p_constraint);
 613   return;
 614 }
 615
 616 /**********
 617  * Action *
 618  **********/
 619 void NetworkCm02ActionLmm::updateRemainingLazy(double now)
 620 {
 621   double delta = 0.0;
 622
 623   if (m_suspended != 0)
 624     return;
 625
 626   delta = now - m_lastUpdate;
 627
 628   if (m_remains > 0) {
 629     XBT_DEBUG("Updating action(%p): remains was %lf, last_update was: %lf", this, m_remains, m_lastUpdate);
 630     double_update(&(m_remains), m_lastValue * delta);
 631
 632     XBT_DEBUG("Updating action(%p): remains is now %lf", this, m_remains);
 633   }
 634
 635   if (m_maxDuration != NO_MAX_DURATION)
 636     double_update(&m_maxDuration, delta);
 637
 638   if (m_remains <= 0 &&
 639       (lmm_get_variable_weight(p_variable) > 0)) {
 640     m_finish = surf_get_clock();
 641     setState(SURF_ACTION_DONE);
 642
 643     heapRemove(p_model->p_actionHeap);
 644   } else if (((m_maxDuration != NO_MAX_DURATION)
 645       && (m_maxDuration <= 0))) {
 646     m_finish = surf_get_clock();
 647     setState(SURF_ACTION_DONE);
 648     heapRemove(p_model->p_actionHeap);
 649   }
 650
 651   m_lastUpdate = now;
 652   m_lastValue = lmm_variable_getvalue(p_variable);
 653 }
 654 void NetworkCm02ActionLmm::recycle()
 655 {
 656   return;
 657 }
 658