src/surf/network.cpp

   1 #include "network.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 NetworkCm02ModelPtr surf_network_model = NULL;
  11
  12 double sg_sender_gap = 0.0;
  13 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  14 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  15 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  16
  17 double sg_tcp_gamma = 0.0;
  18 int sg_network_crosstraffic = 0;
  19
  20 /*************
  21  * CallBacks *
  22  *************/
  23
  24 static void net_parse_link_init(sg_platf_link_cbarg_t link){
  25   if (link->policy == SURF_LINK_FULLDUPLEX) {
  26     char *link_id;
  27     link_id = bprintf("%s_UP", link->id);
  28     surf_network_model->createResource(link_id,
  29                       link->bandwidth,
  30                       link->bandwidth_trace,
  31                       link->latency,
  32                       link->latency_trace,
  33                       link->state,
  34                       link->state_trace, link->policy, link->properties);
  35     xbt_free(link_id);
  36     link_id = bprintf("%s_DOWN", link->id);
  37     surf_network_model->createResource(link_id,
  38                       link->bandwidth,
  39                       link->bandwidth_trace,
  40                       link->latency,
  41                       link->latency_trace,
  42                       link->state,
  43                       link->state_trace, link->policy, link->properties);
  44     xbt_free(link_id);
  45   } else {
  46         surf_network_model->createResource(link->id,
  47                       link->bandwidth,
  48                       link->bandwidth_trace,
  49                       link->latency,
  50                       link->latency_trace,
  51                       link->state,
  52                       link->state_trace, link->policy, link->properties);
  53   }
  54 }
  55
  56 static void net_add_traces(void){
  57   xbt_dict_cursor_t cursor = NULL;
  58   char *trace_name, *elm;
  59
  60   static int called = 0;
  61   if (called)
  62     return;
  63   called = 1;
  64
  65   /* connect all traces relative to network */
  66   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
  67     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  68     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  69                                      static_cast<ResourcePtr>(
  70                                                   xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  71
  72     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  73                trace_name, elm);
  74     xbt_assert(trace,
  75                "Cannot connect trace %s to link %s: trace undefined",
  76                trace_name, elm);
  77
  78     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  79   }
  80
  81   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
  82     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  83     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  84                                  static_cast<ResourcePtr>(
  85                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
  86
  87     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
  88                trace_name, elm);
  89     xbt_assert(trace,
  90                "Cannot connect trace %s to link %s: trace undefined",
  91                trace_name, elm);
  92
  93     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
  94   }
  95
  96   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
  97     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
  98     NetworkCm02LinkLmmPtr link = dynamic_cast<NetworkCm02LinkLmmPtr>(
  99                                  static_cast<ResourcePtr>(
 100                                       xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL)));
 101
 102     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 103                trace_name, elm);
 104     xbt_assert(trace,
 105                "Cannot connect trace %s to link %s: trace undefined",
 106                trace_name, elm);
 107
 108     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, static_cast<ResourcePtr>(link));
 109   }
 110 }
 111
 112 static void net_define_callbacks(void)
 113 {
 114   /* Figuring out the network links */
 115   sg_platf_link_add_cb(net_parse_link_init);
 116   sg_platf_postparse_add_cb(net_add_traces);
 117 }
 118
 119 /*********
 120  * Model *
 121  *********/
 122
 123 /************************************************************************/
 124 /* New model based on optimizations discussed during Pedro Velho's thesis*/
 125 /************************************************************************/
 126 /* @techreport{VELHO:2011:HAL-00646896:1, */
 127 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
 128 /*      title = {{Flow-level network models: have we reached the limits?}}, */
 129 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
 130 /*      type = {Rapport de recherche}, */
 131 /*      institution = {INRIA}, */
 132 /*      number = {RR-7821}, */
 133 /*      year = {2011}, */
 134 /*      month = Nov, */
 135 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
 136 /*  } */
 137 void surf_network_model_init_LegrandVelho(void)
 138 {
 139   if (surf_network_model)
 140     return;
 141
 142   surf_network_model = new NetworkCm02Model();
 143   net_define_callbacks();
 144   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 145   xbt_dynar_push(model_list, &model);
 146
 147   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
 148                             13.01);
 149   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 150                             0.97);
 151   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
 152 }
 153
 154 /***************************************************************************/
 155 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
 156 /***************************************************************************/
 157 /* @TechReport{      rr-lip2002-40, */
 158 /*   author        = {Henri Casanova and Loris Marchal}, */
 159 /*   institution   = {LIP}, */
 160 /*   title         = {A Network Model for Simulation of Grid Application}, */
 161 /*   number        = {2002-40}, */
 162 /*   month         = {oct}, */
 163 /*   year          = {2002} */
 164 /* } */
 165 void surf_network_model_init_CM02(void)
 166 {
 167
 168   if (surf_network_model)
 169     return;
 170
 171   surf_network_model = new NetworkCm02Model();
 172   net_define_callbacks();
 173   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 174   xbt_dynar_push(model_list, &model);
 175
 176   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
 177   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 178                             1.0);
 179   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
 180 }
 181
 182 /***************************************************************************/
 183 /* The models from Steven H. Low                                           */
 184 /***************************************************************************/
 185 /* @article{Low03,                                                         */
 186 /*   author={Steven H. Low},                                               */
 187 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 188 /*   year={2003},                                                          */
 189 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 190 /*    volume={11}, number={4},                                             */
 191 /*  }                                                                      */
 192 void surf_network_model_init_Reno(void)
 193 {
 194   if (surf_network_model)
 195     return;
 196
 197   surf_network_model = new NetworkCm02Model();
 198   net_define_callbacks();
 199   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 200   xbt_dynar_push(model_list, &model);
 201   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 202                                     func_reno_fpi);
 203   surf_network_model->f_networkSolve = lagrange_solve;
 204
 205   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 206   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 207                             0.92);
 208   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 209 }
 210
 211
 212 void surf_network_model_init_Reno2(void)
 213 {
 214   if (surf_network_model)
 215     return;
 216
 217   surf_network_model = new NetworkCm02Model();
 218   net_define_callbacks();
 219   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 220   xbt_dynar_push(model_list, &model);
 221   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 222                                     func_reno2_fpi);
 223   surf_network_model->f_networkSolve = lagrange_solve;
 224
 225   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 226   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 227                             0.92);
 228   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S_parameter",
 229                             8775);
 230 }
 231
 232 void surf_network_model_init_Vegas(void)
 233 {
 234   if (surf_network_model)
 235     return;
 236
 237   surf_network_model = new NetworkCm02Model();
 238   net_define_callbacks();
 239   ModelPtr model = static_cast<ModelPtr>(surf_network_model);
 240   xbt_dynar_push(model_list, &model);
 241   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 242                                     func_vegas_fpi);
 243   surf_network_model->f_networkSolve = lagrange_solve;
 244
 245   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 246   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 247                             0.92);
 248   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 249 }
 250
 251 NetworkCm02Model::NetworkCm02Model() : NetworkCm02Model("network"){
 252 }
 253
 254 NetworkCm02Model::NetworkCm02Model(string name) : Model(name){
 255   ActionLmmPtr comm;
 256
 257   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 258   int select =
 259       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 260
 261   if (!strcmp(optim, "Full")) {
 262     p_updateMechanism = UM_FULL;
 263     m_selectiveUpdate = select;
 264   } else if (!strcmp(optim, "Lazy")) {
 265     p_updateMechanism = UM_LAZY;
 266     m_selectiveUpdate = 1;
 267     xbt_assert((select == 1)
 268                ||
 269                (xbt_cfg_is_default_value
 270                 (_sg_cfg_set, "network/maxmin_selective_update")),
 271                "Disabling selective update while using the lazy update mechanism is dumb!");
 272   } else {
 273     xbt_die("Unsupported optimization (%s) for this model", optim);
 274   }
 275
 276   if (!p_maxminSystem)
 277         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 278
 279   routing_model_create(static_cast<NetworkCm02LinkPtr>(createResource("__loopback__",
 280                                                    498000000, NULL, 0.000015, NULL,
 281                                                    SURF_RESOURCE_ON, NULL,
 282                                                    SURF_LINK_FATPIPE, NULL)));
 283
 284   if (p_updateMechanism == UM_LAZY) {
 285         p_actionHeap = xbt_heap_new(8, NULL);
 286         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 287         p_modifiedSet = xbt_swag_new(xbt_swag_offset(*comm, p_actionListHookup));
 288         p_maxminSystem->keep_track = p_modifiedSet;
 289   }
 290 }
 291
 292 NetworkCm02LinkLmmPtr NetworkCm02Model::createResource(const char *name,
 293                                  double bw_initial,
 294                                  tmgr_trace_t bw_trace,
 295                                  double lat_initial,
 296                                  tmgr_trace_t lat_trace,
 297                                  e_surf_resource_state_t state_initial,
 298                                  tmgr_trace_t state_trace,
 299                                  e_surf_link_sharing_policy_t policy,
 300                                  xbt_dict_t properties)
 301 {
 302   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 303              "Link '%s' declared several times in the platform file.",
 304              name);
 305
 306   NetworkCm02LinkLmmPtr nw_link =
 307                   new NetworkCm02LinkLmm(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 308                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 309
 310
 311   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, static_cast<ResourcePtr>(nw_link));
 312   XBT_DEBUG("Create link '%s'",name);
 313
 314   return nw_link;
 315 }
 316
 317 void NetworkCm02Model::updateActionsStateLazy(double now, double delta)
 318 {
 319   NetworkCm02ActionLmmPtr action;
 320   while ((xbt_heap_size(p_actionHeap) > 0)
 321          && (double_equals(xbt_heap_maxkey(p_actionHeap), now))) {
 322     action = (NetworkCm02ActionLmmPtr) xbt_heap_pop(p_actionHeap);
 323     XBT_DEBUG("Something happened to action %p", action);
 324 #ifdef HAVE_TRACING
 325     if (TRACE_is_enabled()) {
 326       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->p_variable);
 327       unsigned int i;
 328       for (i = 0; i < n; i++){
 329         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 330                                                             action->p_variable,
 331                                                             i);
 332         NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 333         TRACE_surf_link_set_utilization(link->m_name,
 334                                         action->p_category,
 335                                         (lmm_variable_getvalue(action->p_variable)*
 336                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 337                                                 action->p_variable,
 338                                                 i)),
 339                                         action->m_lastUpdate,
 340                                         now - action->m_lastUpdate);
 341       }
 342     }
 343 #endif
 344
 345     // if I am wearing a latency hat
 346     if (action->m_hat == LATENCY) {
 347       XBT_DEBUG("Latency paid for action %p. Activating", action);
 348       lmm_update_variable_weight(p_maxminSystem, action->p_variable, action->m_weight);
 349       action->heapRemove(p_actionHeap);
 350       action->m_lastUpdate = surf_get_clock();
 351
 352         // if I am wearing a max_duration or normal hat
 353     } else if (action->m_hat == MAX_DURATION ||
 354         action->m_hat == NORMAL) {
 355         // no need to communicate anymore
 356         // assume that flows that reached max_duration have remaining of 0
 357       action->m_finish = surf_get_clock();
 358       XBT_DEBUG("Action %p finished", action);
 359       action->m_remains = 0;
 360       action->m_finish = surf_get_clock();
 361       action->setState(SURF_ACTION_DONE);
 362       action->heapRemove(p_actionHeap);
 363
 364       action->gapRemove();
 365     }
 366   }
 367   return;
 368 }
 369
 370 xbt_dynar_t NetworkCm02Model::getRoute(RoutingEdgePtr src, RoutingEdgePtr dst)
 371 {
 372   xbt_dynar_t route = NULL;
 373   routing_platf->getRouteAndLatency(src, dst, &route, NULL);
 374   return route;
 375 }
 376
 377 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 378                                                 double size, double rate)
 379 {
 380   unsigned int i;
 381   void *_link;
 382   NetworkCm02LinkLmmPtr link;
 383   int failed = 0;
 384   NetworkCm02ActionLmmPtr action = NULL;
 385   double bandwidth_bound;
 386   double latency = 0.0;
 387   xbt_dynar_t back_route = NULL;
 388   int constraints_per_variable = 0;
 389
 390   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 391
 392   XBT_IN("(%s,%s,%g,%g)", src->p_name, dst->p_name, size, rate);
 393
 394   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 395   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 396              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 397              src->p_name, dst->p_name);
 398
 399   xbt_dynar_foreach(route, i, _link) {
 400         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 401     if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 402       failed = 1;
 403       break;
 404     }
 405   }
 406   if (sg_network_crosstraffic == 1) {
 407           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 408     xbt_dynar_foreach(back_route, i, _link) {
 409       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 410       if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 411         failed = 1;
 412         break;
 413       }
 414     }
 415   }
 416
 417   action = new NetworkCm02ActionLmm(this, size, failed);
 418
 419 #ifdef HAVE_LATENCY_BOUND_TRACKING
 420   action->m_latencyLimited = 0;
 421 #endif
 422   action->m_weight = action->m_latency = latency;
 423
 424   //FIXME:REMOVxbt_swag_insert(action, action->p_stateSet);
 425   action->m_rate = rate;
 426   if (p_updateMechanism == UM_LAZY) {
 427     action->m_indexHeap = -1;
 428     action->m_lastUpdate = surf_get_clock();
 429   }
 430
 431   bandwidth_bound = -1.0;
 432   if (sg_weight_S_parameter > 0) {
 433     xbt_dynar_foreach(route, i, _link) {
 434       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 435       action->m_weight +=
 436          sg_weight_S_parameter /
 437          (link->p_power.peak * link->p_power.scale);
 438     }
 439   }
 440   xbt_dynar_foreach(route, i, _link) {
 441         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 442     double bb = bandwidthFactor(size) * (link->p_power.peak * link->p_power.scale);
 443     bandwidth_bound =
 444         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 445   }
 446
 447   action->m_latCurrent = action->m_latency;
 448   action->m_latency *= latencyFactor(size);
 449   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 450   if (m_haveGap) {
 451     xbt_assert(!xbt_dynar_is_empty(route),
 452                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 453
 454     //link = *(NetworkCm02LinkLmmPtr *) xbt_dynar_get_ptr(route, 0);
 455     link = dynamic_cast<NetworkCm02LinkLmmPtr>(*static_cast<ResourcePtr *>(xbt_dynar_get_ptr(route, 0)));
 456     gapAppend(size, link, action);
 457     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 458               action, src->p_name, dst->p_name, action->m_senderGap,
 459               action->m_latency);
 460   }
 461
 462   constraints_per_variable = xbt_dynar_length(route);
 463   if (back_route != NULL)
 464     constraints_per_variable += xbt_dynar_length(back_route);
 465
 466   if (action->m_latency > 0) {
 467     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 468                          constraints_per_variable);
 469     if (p_updateMechanism == UM_LAZY) {
 470       // add to the heap the event when the latency is payed
 471       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 472                 action->m_latency + action->m_lastUpdate);
 473       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 474     }
 475   } else
 476     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 477
 478   if (action->m_rate < 0) {
 479     lmm_update_variable_bound(p_maxminSystem, action->p_variable, (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 480   } else {
 481     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);
 482   }
 483
 484   xbt_dynar_foreach(route, i, _link) {
 485         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 486     lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, 1.0);
 487   }
 488
 489   if (sg_network_crosstraffic == 1) {
 490     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 491     xbt_dynar_foreach(back_route, i, _link) {
 492       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 493       lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, .05);
 494     }
 495   }
 496
 497   xbt_dynar_free(&route);
 498   XBT_OUT();
 499
 500   return action;
 501 }
 502
 503 double NetworkCm02Model::latencyFactor(double size) {
 504   return sg_latency_factor;
 505 }
 506
 507 double NetworkCm02Model::bandwidthFactor(double size) {
 508   return sg_bandwidth_factor;
 509 }
 510
 511 double NetworkCm02Model::bandwidthConstraint(double rate, double bound, double size) {
 512   return rate;
 513 }
 514
 515 /************
 516  * Resource *
 517  ************/
 518 NetworkCm02LinkLmm::NetworkCm02LinkLmm(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 519                                    lmm_system_t system,
 520                                    double constraint_value,
 521                                    tmgr_history_t history,
 522                                    e_surf_resource_state_t state_init,
 523                                    tmgr_trace_t state_trace,
 524                                    double metric_peak,
 525                                    tmgr_trace_t metric_trace,
 526                                    double lat_initial,
 527                                    tmgr_trace_t lat_trace,
 528                                    e_surf_link_sharing_policy_t policy)
 529 : Resource(model, name, props),
 530   ResourceLmm(model, name, props, system, constraint_value, history, state_init, state_trace, metric_peak, metric_trace),
 531   NetworkCm02Link(model, name, props)
 532 {
 533   m_latCurrent = lat_initial;
 534   if (lat_trace)
 535         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 536
 537   if (policy == SURF_LINK_FATPIPE)
 538         lmm_constraint_shared(p_constraint);
 539 }
 540
 541 bool NetworkCm02LinkLmm::isUsed()
 542 {
 543   return lmm_constraint_used(p_model->p_maxminSystem, p_constraint);
 544 }
 545
 546 double NetworkCm02Link::getLatency()
 547 {
 548   return m_latCurrent;
 549 }
 550
 551 double NetworkCm02LinkLmm::getBandwidth()
 552 {
 553   return p_power.peak * p_power.scale;
 554 }
 555
 556 bool NetworkCm02LinkLmm::isShared()
 557 {
 558   return lmm_constraint_is_shared(p_constraint);
 559 }
 560
 561 void NetworkCm02LinkLmm::updateState(tmgr_trace_event_t event_type,
 562                                       double value, double date)
 563 {
 564   /*   printf("[" "%lg" "] Asking to update network card \"%s\" with value " */
 565   /*     "%lg" " for event %p\n", surf_get_clock(), nw_link->name, */
 566   /*     value, event_type); */
 567
 568   if (event_type == p_power.event) {
 569     double delta =
 570         sg_weight_S_parameter / value - sg_weight_S_parameter /
 571         (p_power.peak * p_power.scale);
 572     lmm_variable_t var = NULL;
 573     lmm_element_t elem = NULL;
 574     NetworkCm02ActionLmmPtr action = NULL;
 575
 576     p_power.peak = value;
 577     lmm_update_constraint_bound(p_model->p_maxminSystem,
 578                                 p_constraint,
 579                                 sg_bandwidth_factor *
 580                                 (p_power.peak * p_power.scale));
 581 #ifdef HAVE_TRACING
 582     TRACE_surf_link_set_bandwidth(date, m_name, sg_bandwidth_factor * p_power.peak * p_power.scale);
 583 #endif
 584     if (sg_weight_S_parameter > 0) {
 585       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 586         action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 587         action->m_weight += delta;
 588         if (!action->m_suspended)
 589           lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 590       }
 591     }
 592     if (tmgr_trace_event_free(event_type))
 593       p_power.event = NULL;
 594   } else if (event_type == p_latEvent) {
 595     double delta = value - m_latCurrent;
 596     lmm_variable_t var = NULL;
 597     lmm_element_t elem = NULL;
 598     NetworkCm02ActionLmmPtr action = NULL;
 599
 600     m_latCurrent = value;
 601     while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 602       action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 603       action->m_latCurrent += delta;
 604       action->m_weight += delta;
 605       if (action->m_rate < 0)
 606         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable, sg_tcp_gamma / (2.0 * action->m_latCurrent));
 607       else {
 608         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable,
 609                                   min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 610
 611         if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 612           XBT_INFO("Flow is limited BYBANDWIDTH");
 613         } else {
 614           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 615                    action->m_latCurrent);
 616         }
 617       }
 618       if (!action->m_suspended)
 619         lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 620
 621     }
 622     if (tmgr_trace_event_free(event_type))
 623       p_latEvent = NULL;
 624   } else if (event_type == p_stateEvent) {
 625     if (value > 0)
 626       p_stateCurrent = SURF_RESOURCE_ON;
 627     else {
 628       lmm_constraint_t cnst = p_constraint;
 629       lmm_variable_t var = NULL;
 630       lmm_element_t elem = NULL;
 631
 632       p_stateCurrent = SURF_RESOURCE_OFF;
 633       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, cnst, &elem))) {
 634         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 635
 636         if (action->getState() == SURF_ACTION_RUNNING ||
 637             action->getState() == SURF_ACTION_READY) {
 638           action->m_finish = date;
 639           action->setState(SURF_ACTION_FAILED);
 640         }
 641       }
 642     }
 643     if (tmgr_trace_event_free(event_type))
 644       p_stateEvent = NULL;
 645   } else {
 646     XBT_CRITICAL("Unknown event ! \n");
 647     xbt_abort();
 648   }
 649
 650   XBT_DEBUG
 651       ("There were a resource state event, need to update actions related to the constraint (%p)",
 652        p_constraint);
 653   return;
 654 }
 655
 656 /**********
 657  * Action *
 658  **********/
 659 void NetworkCm02ActionLmm::updateRemainingLazy(double now)
 660 {
 661   double delta = 0.0;
 662
 663   if (m_suspended != 0)
 664     return;
 665
 666   delta = now - m_lastUpdate;
 667
 668   if (m_remains > 0) {
 669     XBT_DEBUG("Updating action(%p): remains was %lf, last_update was: %lf", this, m_remains, m_lastUpdate);
 670     double_update(&(m_remains), m_lastValue * delta);
 671
 672     XBT_DEBUG("Updating action(%p): remains is now %lf", this, m_remains);
 673   }
 674
 675   if (m_maxDuration != NO_MAX_DURATION)
 676     double_update(&m_maxDuration, delta);
 677
 678   if (m_remains <= 0 &&
 679       (lmm_get_variable_weight(p_variable) > 0)) {
 680     m_finish = surf_get_clock();
 681     setState(SURF_ACTION_DONE);
 682
 683     heapRemove(p_model->p_actionHeap);
 684   } else if (((m_maxDuration != NO_MAX_DURATION)
 685       && (m_maxDuration <= 0))) {
 686     m_finish = surf_get_clock();
 687     setState(SURF_ACTION_DONE);
 688     heapRemove(p_model->p_actionHeap);
 689   }
 690
 691   m_lastUpdate = now;
 692   m_lastValue = lmm_variable_getvalue(p_variable);
 693 }
 694 void NetworkCm02ActionLmm::recycle()
 695 {
 696   return;
 697 }
 698