src/surf/network_cm02.cpp

   1 #include "network_cm02.hpp"
   2 #include "maxmin_private.h"
   3 #include "simgrid/sg_config.h"
   4
   5 extern "C" {
   6 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
   7                                 "Logging specific to the SURF network module");
   8 }
   9
  10 double sg_sender_gap = 0.0;
  11 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  12 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  13 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  14
  15 double sg_tcp_gamma = 0.0;
  16 int sg_network_crosstraffic = 0;
  17
  18 /*************
  19  * CallBacks *
  20  *************/
  21
  22 static void net_parse_link_init(sg_platf_link_cbarg_t link){
  23   if (link->policy == SURF_LINK_FULLDUPLEX) {
  24     char *link_id;
  25     link_id = bprintf("%s_UP", link->id);
  26     surf_network_model->createResource(link_id,
  27                       link->bandwidth,
  28                       link->bandwidth_trace,
  29                       link->latency,
  30                       link->latency_trace,
  31                       link->state,
  32                       link->state_trace, link->policy, link->properties);
  33     xbt_free(link_id);
  34     link_id = bprintf("%s_DOWN", link->id);
  35     surf_network_model->createResource(link_id,
  36                       link->bandwidth,
  37                       link->bandwidth_trace,
  38                       link->latency,
  39                       link->latency_trace,
  40                       link->state,
  41                       link->state_trace, link->policy, link->properties);
  42     xbt_free(link_id);
  43   } else {
  44         surf_network_model->createResource(link->id,
  45                       link->bandwidth,
  46                       link->bandwidth_trace,
  47                       link->latency,
  48                       link->latency_trace,
  49                       link->state,
  50                       link->state_trace, link->policy, link->properties);
  51   }
  52 }
  53
  54 static void net_add_traces(void){
  55   xbt_dict_cursor_t cursor = NULL;
  56   char *trace_name, *elm;
  57
  58   static int called = 0;
  59   if (called)
  60     return;
  61   called = 1;
  62
  63   /* connect all traces relative to network */
  64   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
  65     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  66     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  67                                      static_cast<ResourcePtr>(
  68                                                   xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  69
  70     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  71                trace_name, elm);
  72     xbt_assert(trace,
  73                "Cannot connect trace %s to link %s: trace undefined",
  74                trace_name, elm);
  75
  76     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  77   }
  78
  79   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
  80     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  81     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  82                                  static_cast<ResourcePtr>(
  83                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  84
  85     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  86                trace_name, elm);
  87     xbt_assert(trace,
  88                "Cannot connect trace %s to link %s: trace undefined",
  89                trace_name, elm);
  90
  91     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  92   }
  93
  94   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
  95     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  96     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  97                                  static_cast<ResourcePtr>(
  98                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  99
 100     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 101                trace_name, elm);
 102     xbt_assert(trace,
 103                "Cannot connect trace %s to link %s: trace undefined",
 104                trace_name, elm);
 105
 106     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
 107   }
 108 }
 109
 110 void net_define_callbacks(void)
 111 {
 112   /* Figuring out the network links */
 113   sg_platf_link_add_cb(net_parse_link_init);
 114   sg_platf_postparse_add_cb(net_add_traces);
 115 }
 116
 117 /*********
 118  * Model *
 119  *********/
 120
 121 /************************************************************************/
 122 /* New model based on optimizations discussed during Pedro Velho's thesis*/
 123 /************************************************************************/
 124 /* @techreport{VELHO:2011:HAL-00646896:1, */
 125 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
 126 /*      title = {{Flow-level network models: have we reached the limits?}}, */
 127 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
 128 /*      type = {Rapport de recherche}, */
 129 /*      institution = {INRIA}, */
 130 /*      number = {RR-7821}, */
 131 /*      year = {2011}, */
 132 /*      month = Nov, */
 133 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
 134 /*  } */
 135 void surf_network_model_init_LegrandVelho(void)
 136 {
 137   if (surf_network_model)
 138     return;
 139
 140   surf_network_model = new NetworkCm02Model();
 141   net_define_callbacks();
 142   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 143   xbt_dynar_push(model_list, &model);
 144
 145   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
 146                             13.01);
 147   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 148                             0.97);
 149   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
 150 }
 151
 152 /***************************************************************************/
 153 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 154 /***************************************************************************/
 155 /* @TechReport{      rr-lip2002-40, */
 156 /*   author        = {Henri Casanova and Loris Marchal}, */
 157 /*   institution   = {LIP}, */
 158 /*   title         = {A Network Model for Simulation of Grid Application}, */
 159 /*   number        = {2002-40}, */
 160 /*   month         = {oct}, */
 161 /*   year          = {2002} */
 162 /* } */
 163 void surf_network_model_init_CM02(void)
 164 {
 165
 166   if (surf_network_model)
 167     return;
 168
 169   surf_network_model = new NetworkCm02Model();
 170   net_define_callbacks();
 171   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 172   xbt_dynar_push(model_list, &model);
 173
 174   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
 175   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 176                             1.0);
 177   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
 178 }
 179
 180 /***************************************************************************/
 181 /* The models from Steven H. Low                                           */
 182 /***************************************************************************/
 183 /* @article{Low03,                                                         */
 184 /*   author={Steven H. Low},                                               */
 185 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 186 /*   year={2003},                                                          */
 187 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 188 /*    volume={11}, number={4},                                             */
 189 /*  }                                                                      */
 190 void surf_network_model_init_Reno(void)
 191 {
 192   if (surf_network_model)
 193     return;
 194
 195   surf_network_model = new NetworkCm02Model();
 196   net_define_callbacks();
 197   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 198   xbt_dynar_push(model_list, &model);
 199   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 200                                     func_reno_fpi);
 201   surf_network_model->f_networkSolve = lagrange_solve;
 202
 203   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 204   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 205                             0.92);
 206   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 207 }
 208
 209
 210 void surf_network_model_init_Reno2(void)
 211 {
 212   if (surf_network_model)
 213     return;
 214
 215   surf_network_model = new NetworkCm02Model();
 216   net_define_callbacks();
 217   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 218   xbt_dynar_push(model_list, &model);
 219   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 220                                     func_reno2_fpi);
 221   surf_network_model->f_networkSolve = lagrange_solve;
 222
 223   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 224   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 225                             0.92);
 226   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S_parameter",
 227                             8775);
 228 }
 229
 230 void surf_network_model_init_Vegas(void)
 231 {
 232   if (surf_network_model)
 233     return;
 234
 235   surf_network_model = new NetworkCm02Model();
 236   net_define_callbacks();
 237   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 238   xbt_dynar_push(model_list, &model);
 239   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 240                                     func_vegas_fpi);
 241   surf_network_model->f_networkSolve = lagrange_solve;
 242
 243   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 244   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 245                             0.92);
 246   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 247 }
 248
 249 void NetworkCm02Model::initialize()
 250 {
 251   ActionLmmPtr comm = NULL;
 252
 253   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 254   int select =
 255       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 256
 257   if (!strcmp(optim, "Full")) {
 258     p_updateMechanism = UM_FULL;
 259     m_selectiveUpdate = select;
 260   } else if (!strcmp(optim, "Lazy")) {
 261     p_updateMechanism = UM_LAZY;
 262     m_selectiveUpdate = 1;
 263     xbt_assert((select == 1)
 264                ||
 265                (xbt_cfg_is_default_value
 266                 (_sg_cfg_set, "network/maxmin_selective_update")),
 267                "Disabling selective update while using the lazy update mechanism is dumb!");
 268   } else {
 269     xbt_die("Unsupported optimization (%s) for this model", optim);
 270   }
 271
 272   if (!p_maxminSystem)
 273         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 274
 275   const char* lb_name = "__loopback__";
 276   routing_model_create(static_cast<ResourcePtr>(createResource(lb_name,
 277                                                    498000000, NULL, 0.000015, NULL,
 278                                                    SURF_RESOURCE_ON, NULL,
 279                                                    SURF_LINK_FATPIPE, NULL)));
 280
 281   if (p_updateMechanism == UM_LAZY) {
 282         p_actionHeap = xbt_heap_new(8, NULL);
 283         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 284         p_modifiedSet = xbt_swag_new(xbt_swag_offset(*comm, p_actionListHookup));
 285         p_maxminSystem->keep_track = p_modifiedSet;
 286   }
 287
 288   m_haveGap = false;
 289 }
 290
 291 NetworkLinkPtr NetworkCm02Model::createResource(const char *name,
 292                                  double bw_initial,
 293                                  tmgr_trace_t bw_trace,
 294                                  double lat_initial,
 295                                  tmgr_trace_t lat_trace,
 296                                  e_surf_resource_state_t state_initial,
 297                                  tmgr_trace_t state_trace,
 298                                  e_surf_link_sharing_policy_t policy,
 299                                  xbt_dict_t properties)
 300 {
 301   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 302              "Link '%s' declared several times in the platform file.",
 303              name);
 304
 305   NetworkCm02LinkLmmPtr nw_link =
 306                   new NetworkCm02LinkLmm(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 307                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 308
 309
 310   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, static_cast<ResourcePtr>(nw_link));
 311   XBT_DEBUG("Create link '%s'",name);
 312
 313   return nw_link;
 314 }
 315
 316 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 317 {
 318   NetworkCm02ActionLmmPtr action;
 319   while ((xbt_heap_size(p_actionHeap) > 0)
 320          && (double_equals(xbt_heap_maxkey(p_actionHeap), now))) {
 321     action = (NetworkCm02ActionLmmPtr) xbt_heap_pop(p_actionHeap);
 322     XBT_DEBUG("Something happened to action %p", action);
 323 #ifdef HAVE_TRACING
 324     if (TRACE_is_enabled()) {
 325       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->p_variable);
 326       int i;
 327       for (i = 0; i < n; i++){
 328         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 329                                                             action->p_variable,
 330                                                             i);
 331         NetworkCm02LinkLmmPtr link = static_cast<NetworkCm02LinkLmmPtr>(lmm_constraint_id(constraint));
 332         TRACE_surf_link_set_utilization(link->m_name,
 333                                         action->p_category,
 334                                         (lmm_variable_getvalue(action->p_variable)*
 335                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 336                                                 action->p_variable,
 337                                                 i)),
 338                                         action->m_lastUpdate,
 339                                         now - action->m_lastUpdate);
 340       }
 341     }
 342 #endif
 343
 344     // if I am wearing a latency hat
 345     if (action->m_hat == LATENCY) {
 346       XBT_DEBUG("Latency paid for action %p. Activating", action);
 347       lmm_update_variable_weight(p_maxminSystem, action->p_variable, action->m_weight);
 348       action->heapRemove(p_actionHeap);
 349       action->m_lastUpdate = surf_get_clock();
 350
 351         // if I am wearing a max_duration or normal hat
 352     } else if (action->m_hat == MAX_DURATION ||
 353         action->m_hat == NORMAL) {
 354         // no need to communicate anymore
 355         // assume that flows that reached max_duration have remaining of 0
 356       action->m_finish = surf_get_clock();
 357       XBT_DEBUG("Action %p finished", action);
 358       action->m_remains = 0;
 359       action->m_finish = surf_get_clock();
 360       action->setState(SURF_ACTION_DONE);
 361       action->heapRemove(p_actionHeap);
 362
 363       action->gapRemove();
 364     }
 365   }
 366   return;
 367 }
 368
 369 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 370                                                 double size, double rate)
 371 {
 372   unsigned int i;
 373   void *_link;
 374   NetworkCm02LinkLmmPtr link;
 375   int failed = 0;
 376   NetworkCm02ActionLmmPtr action = NULL;
 377   double bandwidth_bound;
 378   double latency = 0.0;
 379   xbt_dynar_t back_route = NULL;
 380   int constraints_per_variable = 0;
 381
 382   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 383
 384   XBT_IN("(%s,%s,%g,%g)", src->p_name, dst->p_name, size, rate);
 385
 386   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 387   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 388              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 389              src->p_name, dst->p_name);
 390
 391   xbt_dynar_foreach(route, i, _link) {
 392         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 393     if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 394       failed = 1;
 395       break;
 396     }
 397   }
 398   if (sg_network_crosstraffic == 1) {
 399           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 400     xbt_dynar_foreach(back_route, i, _link) {
 401       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 402       if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 403         failed = 1;
 404         break;
 405       }
 406     }
 407   }
 408
 409   action = new NetworkCm02ActionLmm(this, size, failed);
 410
 411 #ifdef HAVE_LATENCY_BOUND_TRACKING
 412   action->m_latencyLimited = 0;
 413 #endif
 414   action->m_weight = action->m_latency = latency;
 415
 416   //FIXME:REMOVxbt_swag_insert(action, action->p_stateSet);
 417   action->m_rate = rate;
 418   if (p_updateMechanism == UM_LAZY) {
 419     action->m_indexHeap = -1;
 420     action->m_lastUpdate = surf_get_clock();
 421   }
 422
 423   bandwidth_bound = -1.0;
 424   if (sg_weight_S_parameter > 0) {
 425     xbt_dynar_foreach(route, i, _link) {
 426       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 427       action->m_weight +=
 428          sg_weight_S_parameter /
 429          (link->p_power.peak * link->p_power.scale);
 430     }
 431   }
 432   xbt_dynar_foreach(route, i, _link) {
 433         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 434     double bb = bandwidthFactor(size) * (link->p_power.peak * link->p_power.scale);
 435     bandwidth_bound =
 436         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 437   }
 438
 439   action->m_latCurrent = action->m_latency;
 440   action->m_latency *= latencyFactor(size);
 441   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 442   if (m_haveGap) {
 443     xbt_assert(!xbt_dynar_is_empty(route),
 444                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 445
 446     //link = *(NetworkCm02LinkLmmPtr *) xbt_dynar_get_ptr(route, 0);
 447     link = dynamic_cast<NetworkCm02LinkLmmPtr>(*static_cast<ResourcePtr *>(xbt_dynar_get_ptr(route, 0)));
 448     gapAppend(size, link, action);
 449     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 450               action, src->p_name, dst->p_name, action->m_senderGap,
 451               action->m_latency);
 452   }
 453
 454   constraints_per_variable = xbt_dynar_length(route);
 455   if (back_route != NULL)
 456     constraints_per_variable += xbt_dynar_length(back_route);
 457
 458   if (action->m_latency > 0) {
 459     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 460                          constraints_per_variable);
 461     if (p_updateMechanism == UM_LAZY) {
 462       // add to the heap the event when the latency is payed
 463       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 464                 action->m_latency + action->m_lastUpdate);
 465       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 466     }
 467   } else
 468     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 469
 470   if (action->m_rate < 0) {
 471     lmm_update_variable_bound(p_maxminSystem, action->p_variable, (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 472   } else {
 473     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);
 474   }
 475
 476   xbt_dynar_foreach(route, i, _link) {
 477         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 478     lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, 1.0);
 479   }
 480
 481   if (sg_network_crosstraffic == 1) {
 482     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 483     xbt_dynar_foreach(back_route, i, _link) {
 484       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 485       lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, .05);
 486     }
 487   }
 488
 489   xbt_dynar_free(&route);
 490   XBT_OUT();
 491
 492   return action;
 493 }
 494
 495
 496
 497 /************
 498  * Resource *
 499  ************/
 500 NetworkCm02LinkLmm::NetworkCm02LinkLmm(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 501                                    lmm_system_t system,
 502                                    double constraint_value,
 503                                    tmgr_history_t history,
 504                                    e_surf_resource_state_t state_init,
 505                                    tmgr_trace_t state_trace,
 506                                    double metric_peak,
 507                                    tmgr_trace_t metric_trace,
 508                                    double lat_initial,
 509                                    tmgr_trace_t lat_trace,
 510                                    e_surf_link_sharing_policy_t policy)
 511 : Resource(model, name, props),
 512   NetworkLinkLmm(system, constraint_value, history, state_init, state_trace, metric_peak, metric_trace)
 513 {
 514   m_latCurrent = lat_initial;
 515   if (lat_trace)
 516         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 517
 518   if (policy == SURF_LINK_FATPIPE)
 519         lmm_constraint_shared(p_constraint);
 520 }
 521
 522
 523
 524 void NetworkCm02LinkLmm::updateState(tmgr_trace_event_t event_type,
 525                                       double value, double date)
 526 {
 527   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 528   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 529   /*     value, event_type); */
 530
 531   if (event_type == p_power.event) {
 532     double delta =
 533         sg_weight_S_parameter / value - sg_weight_S_parameter /
 534         (p_power.peak * p_power.scale);
 535     lmm_variable_t var = NULL;
 536     lmm_element_t elem = NULL;
 537     NetworkCm02ActionLmmPtr action = NULL;
 538
 539     p_power.peak = value;
 540     lmm_update_constraint_bound(p_model->p_maxminSystem,
 541                                 p_constraint,
 542                                 sg_bandwidth_factor *
 543                                 (p_power.peak * p_power.scale));
 544 #ifdef HAVE_TRACING
 545     TRACE_surf_link_set_bandwidth(date, m_name, sg_bandwidth_factor * p_power.peak * p_power.scale);
 546 #endif
 547     if (sg_weight_S_parameter > 0) {
 548       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 549         action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 550         action->m_weight += delta;
 551         if (!action->m_suspended)
 552           lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 553       }
 554     }
 555     if (tmgr_trace_event_free(event_type))
 556       p_power.event = NULL;
 557   } else if (event_type == p_latEvent) {
 558     double delta = value - m_latCurrent;
 559     lmm_variable_t var = NULL;
 560     lmm_element_t elem = NULL;
 561     NetworkCm02ActionLmmPtr action = NULL;
 562
 563     m_latCurrent = value;
 564     while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 565       action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 566       action->m_latCurrent += delta;
 567       action->m_weight += delta;
 568       if (action->m_rate < 0)
 569         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable, sg_tcp_gamma / (2.0 * action->m_latCurrent));
 570       else {
 571         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable,
 572                                   min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 573
 574         if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 575           XBT_INFO("Flow is limited BYBANDWIDTH");
 576         } else {
 577           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 578                    action->m_latCurrent);
 579         }
 580       }
 581       if (!action->m_suspended)
 582         lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 583
 584     }
 585     if (tmgr_trace_event_free(event_type))
 586       p_latEvent = NULL;
 587   } else if (event_type == p_stateEvent) {
 588     if (value > 0)
 589       p_stateCurrent = SURF_RESOURCE_ON;
 590     else {
 591       lmm_constraint_t cnst = p_constraint;
 592       lmm_variable_t var = NULL;
 593       lmm_element_t elem = NULL;
 594
 595       p_stateCurrent = SURF_RESOURCE_OFF;
 596       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, cnst, &elem))) {
 597         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 598
 599         if (action->getState() == SURF_ACTION_RUNNING ||
 600             action->getState() == SURF_ACTION_READY) {
 601           action->m_finish = date;
 602           action->setState(SURF_ACTION_FAILED);
 603         }
 604       }
 605     }
 606     if (tmgr_trace_event_free(event_type))
 607       p_stateEvent = NULL;
 608   } else {
 609     XBT_CRITICAL("Unknown event ! \n");
 610     xbt_abort();
 611   }
 612
 613   XBT_DEBUG
 614       ("There were a resource state event, need to update actions related to the constraint (%p)",
 615        p_constraint);
 616   return;
 617 }
 618
 619 /**********
 620  * Action *
 621  **********/
 622 void NetworkCm02ActionLmm::updateRemainingLazy(double now)
 623 {
 624   double delta = 0.0;
 625
 626   if (m_suspended != 0)
 627     return;
 628
 629   delta = now - m_lastUpdate;
 630
 631   if (m_remains > 0) {
 632     XBT_DEBUG("Updating action(%p): remains was %lf, last_update was: %lf", this, m_remains, m_lastUpdate);
 633     double_update(&(m_remains), m_lastValue * delta);
 634
 635     XBT_DEBUG("Updating action(%p): remains is now %lf", this, m_remains);
 636   }
 637
 638   if (m_maxDuration != NO_MAX_DURATION)
 639     double_update(&m_maxDuration, delta);
 640
 641   if (m_remains <= 0 &&
 642       (lmm_get_variable_weight(p_variable) > 0)) {
 643     m_finish = surf_get_clock();
 644     setState(SURF_ACTION_DONE);
 645
 646     heapRemove(p_model->p_actionHeap);
 647   } else if (((m_maxDuration != NO_MAX_DURATION)
 648       && (m_maxDuration <= 0))) {
 649     m_finish = surf_get_clock();
 650     setState(SURF_ACTION_DONE);
 651     heapRemove(p_model->p_actionHeap);
 652   }
 653
 654   m_lastUpdate = now;
 655   m_lastValue = lmm_variable_getvalue(p_variable);
 656 }
 657 void NetworkCm02ActionLmm::recycle()
 658 {
 659   return;
 660 }
 661