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 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 void NetworkCm02Model::initialize()
 252 {
 253   ActionLmmPtr comm;
 254
 255   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 256   int select =
 257       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 258
 259   if (!strcmp(optim, "Full")) {
 260     p_updateMechanism = UM_FULL;
 261     m_selectiveUpdate = select;
 262   } else if (!strcmp(optim, "Lazy")) {
 263     p_updateMechanism = UM_LAZY;
 264     m_selectiveUpdate = 1;
 265     xbt_assert((select == 1)
 266                ||
 267                (xbt_cfg_is_default_value
 268                 (_sg_cfg_set, "network/maxmin_selective_update")),
 269                "Disabling selective update while using the lazy update mechanism is dumb!");
 270   } else {
 271     xbt_die("Unsupported optimization (%s) for this model", optim);
 272   }
 273
 274   if (!p_maxminSystem)
 275         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 276
 277   routing_model_create(static_cast<ResourcePtr>(createResource("__loopback__",
 278                                                    498000000, NULL, 0.000015, NULL,
 279                                                    SURF_RESOURCE_ON, NULL,
 280                                                    SURF_LINK_FATPIPE, NULL)));
 281
 282   if (p_updateMechanism == UM_LAZY) {
 283         p_actionHeap = xbt_heap_new(8, NULL);
 284         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 285         p_modifiedSet = xbt_swag_new(xbt_swag_offset(*comm, p_actionListHookup));
 286         p_maxminSystem->keep_track = p_modifiedSet;
 287   }
 288 }
 289
 290 NetworkCm02LinkLmmPtr NetworkCm02Model::createResource(const char *name,
 291                                  double bw_initial,
 292                                  tmgr_trace_t bw_trace,
 293                                  double lat_initial,
 294                                  tmgr_trace_t lat_trace,
 295                                  e_surf_resource_state_t state_initial,
 296                                  tmgr_trace_t state_trace,
 297                                  e_surf_link_sharing_policy_t policy,
 298                                  xbt_dict_t properties)
 299 {
 300   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 301              "Link '%s' declared several times in the platform file.",
 302              name);
 303
 304   NetworkCm02LinkLmmPtr nw_link =
 305                   new NetworkCm02LinkLmm(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 306                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 307
 308
 309   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, static_cast<ResourcePtr>(nw_link));
 310   XBT_DEBUG("Create link '%s'",name);
 311
 312   return nw_link;
 313 }
 314
 315 void NetworkCm02Model::updateActionsStateLazy(double now, double delta)
 316 {
 317   NetworkCm02ActionLmmPtr action;
 318   while ((xbt_heap_size(p_actionHeap) > 0)
 319          && (double_equals(xbt_heap_maxkey(p_actionHeap), now))) {
 320     action = (NetworkCm02ActionLmmPtr) xbt_heap_pop(p_actionHeap);
 321     XBT_DEBUG("Something happened to action %p", action);
 322 #ifdef HAVE_TRACING
 323     if (TRACE_is_enabled()) {
 324       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->p_variable);
 325       unsigned int i;
 326       for (i = 0; i < n; i++){
 327         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 328                                                             action->p_variable,
 329                                                             i);
 330         NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 331         TRACE_surf_link_set_utilization(link->m_name,
 332                                         action->p_category,
 333                                         (lmm_variable_getvalue(action->p_variable)*
 334                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 335                                                 action->p_variable,
 336                                                 i)),
 337                                         action->m_lastUpdate,
 338                                         now - action->m_lastUpdate);
 339       }
 340     }
 341 #endif
 342
 343     // if I am wearing a latency hat
 344     if (action->m_hat == LATENCY) {
 345       XBT_DEBUG("Latency paid for action %p. Activating", action);
 346       lmm_update_variable_weight(p_maxminSystem, action->p_variable, action->m_weight);
 347       action->heapRemove(p_actionHeap);
 348       action->m_lastUpdate = surf_get_clock();
 349
 350         // if I am wearing a max_duration or normal hat
 351     } else if (action->m_hat == MAX_DURATION ||
 352         action->m_hat == NORMAL) {
 353         // no need to communicate anymore
 354         // assume that flows that reached max_duration have remaining of 0
 355       action->m_finish = surf_get_clock();
 356       XBT_DEBUG("Action %p finished", action);
 357       action->m_remains = 0;
 358       action->m_finish = surf_get_clock();
 359       action->setState(SURF_ACTION_DONE);
 360       action->heapRemove(p_actionHeap);
 361
 362       action->gapRemove();
 363     }
 364   }
 365   return;
 366 }
 367
 368 xbt_dynar_t NetworkCm02Model::getRoute(RoutingEdgePtr src, RoutingEdgePtr dst)
 369 {
 370   xbt_dynar_t route = NULL;
 371   routing_platf->getRouteAndLatency(src, dst, &route, NULL);
 372   return route;
 373 }
 374
 375 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 376                                                 double size, double rate)
 377 {
 378   unsigned int i;
 379   void *_link;
 380   NetworkCm02LinkLmmPtr link;
 381   int failed = 0;
 382   NetworkCm02ActionLmmPtr action = NULL;
 383   double bandwidth_bound;
 384   double latency = 0.0;
 385   xbt_dynar_t back_route = NULL;
 386   int constraints_per_variable = 0;
 387
 388   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 389
 390   XBT_IN("(%s,%s,%g,%g)", src->p_name, dst->p_name, size, rate);
 391
 392   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 393   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 394              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 395              src->p_name, dst->p_name);
 396
 397   xbt_dynar_foreach(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   if (sg_network_crosstraffic == 1) {
 405           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 406     xbt_dynar_foreach(back_route, i, _link) {
 407       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 408       if (link->p_stateCurrent == SURF_RESOURCE_OFF) {
 409         failed = 1;
 410         break;
 411       }
 412     }
 413   }
 414
 415   action = new NetworkCm02ActionLmm(this, size, failed);
 416
 417 #ifdef HAVE_LATENCY_BOUND_TRACKING
 418   action->m_latencyLimited = 0;
 419 #endif
 420   action->m_weight = action->m_latency = latency;
 421
 422   //FIXME:REMOVxbt_swag_insert(action, action->p_stateSet);
 423   action->m_rate = rate;
 424   if (p_updateMechanism == UM_LAZY) {
 425     action->m_indexHeap = -1;
 426     action->m_lastUpdate = surf_get_clock();
 427   }
 428
 429   bandwidth_bound = -1.0;
 430   if (sg_weight_S_parameter > 0) {
 431     xbt_dynar_foreach(route, i, _link) {
 432       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 433       action->m_weight +=
 434          sg_weight_S_parameter /
 435          (link->p_power.peak * link->p_power.scale);
 436     }
 437   }
 438   xbt_dynar_foreach(route, i, _link) {
 439         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 440     double bb = bandwidthFactor(size) * (link->p_power.peak * link->p_power.scale);
 441     bandwidth_bound =
 442         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 443   }
 444
 445   action->m_latCurrent = action->m_latency;
 446   action->m_latency *= latencyFactor(size);
 447   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 448   if (m_haveGap) {
 449     xbt_assert(!xbt_dynar_is_empty(route),
 450                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 451
 452     //link = *(NetworkCm02LinkLmmPtr *) xbt_dynar_get_ptr(route, 0);
 453     link = dynamic_cast<NetworkCm02LinkLmmPtr>(*static_cast<ResourcePtr *>(xbt_dynar_get_ptr(route, 0)));
 454     gapAppend(size, link, action);
 455     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 456               action, src->p_name, dst->p_name, action->m_senderGap,
 457               action->m_latency);
 458   }
 459
 460   constraints_per_variable = xbt_dynar_length(route);
 461   if (back_route != NULL)
 462     constraints_per_variable += xbt_dynar_length(back_route);
 463
 464   if (action->m_latency > 0) {
 465     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 466                          constraints_per_variable);
 467     if (p_updateMechanism == UM_LAZY) {
 468       // add to the heap the event when the latency is payed
 469       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 470                 action->m_latency + action->m_lastUpdate);
 471       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 472     }
 473   } else
 474     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 475
 476   if (action->m_rate < 0) {
 477     lmm_update_variable_bound(p_maxminSystem, action->p_variable, (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 478   } else {
 479     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);
 480   }
 481
 482   xbt_dynar_foreach(route, i, _link) {
 483         link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 484     lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, 1.0);
 485   }
 486
 487   if (sg_network_crosstraffic == 1) {
 488     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 489     xbt_dynar_foreach(back_route, i, _link) {
 490       link = dynamic_cast<NetworkCm02LinkLmmPtr>(static_cast<ResourcePtr>(_link));
 491       lmm_expand(p_maxminSystem, link->p_constraint, action->p_variable, .05);
 492     }
 493   }
 494
 495   xbt_dynar_free(&route);
 496   XBT_OUT();
 497
 498   return action;
 499 }
 500
 501 double NetworkCm02Model::latencyFactor(double size) {
 502   return sg_latency_factor;
 503 }
 504
 505 double NetworkCm02Model::bandwidthFactor(double size) {
 506   return sg_bandwidth_factor;
 507 }
 508
 509 double NetworkCm02Model::bandwidthConstraint(double rate, double bound, double size) {
 510   return rate;
 511 }
 512
 513 /************
 514  * Resource *
 515  ************/
 516 NetworkCm02LinkLmm::NetworkCm02LinkLmm(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 517                                    lmm_system_t system,
 518                                    double constraint_value,
 519                                    tmgr_history_t history,
 520                                    e_surf_resource_state_t state_init,
 521                                    tmgr_trace_t state_trace,
 522                                    double metric_peak,
 523                                    tmgr_trace_t metric_trace,
 524                                    double lat_initial,
 525                                    tmgr_trace_t lat_trace,
 526                                    e_surf_link_sharing_policy_t policy)
 527 : Resource(model, name, props),
 528   ResourceLmm(model, name, props, system, constraint_value, history, state_init, state_trace, metric_peak, metric_trace),
 529   NetworkCm02Link(model, name, props)
 530 {
 531   m_latCurrent = lat_initial;
 532   if (lat_trace)
 533         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, static_cast<ResourcePtr>(this));
 534
 535   if (policy == SURF_LINK_FATPIPE)
 536         lmm_constraint_shared(p_constraint);
 537 }
 538
 539 bool NetworkCm02LinkLmm::isUsed()
 540 {
 541   return lmm_constraint_used(p_model->p_maxminSystem, p_constraint);
 542 }
 543
 544 double NetworkCm02Link::getLatency()
 545 {
 546   return m_latCurrent;
 547 }
 548
 549 double NetworkCm02LinkLmm::getBandwidth()
 550 {
 551   return p_power.peak * p_power.scale;
 552 }
 553
 554 bool NetworkCm02LinkLmm::isShared()
 555 {
 556   return lmm_constraint_is_shared(p_constraint);
 557 }
 558
 559 void NetworkCm02LinkLmm::updateState(tmgr_trace_event_t event_type,
 560                                       double value, double date)
 561 {
 562   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 563   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 564   /*     value, event_type); */
 565
 566   if (event_type == p_power.event) {
 567     double delta =
 568         sg_weight_S_parameter / value - sg_weight_S_parameter /
 569         (p_power.peak * p_power.scale);
 570     lmm_variable_t var = NULL;
 571     lmm_element_t elem = NULL;
 572     NetworkCm02ActionLmmPtr action = NULL;
 573
 574     p_power.peak = value;
 575     lmm_update_constraint_bound(p_model->p_maxminSystem,
 576                                 p_constraint,
 577                                 sg_bandwidth_factor *
 578                                 (p_power.peak * p_power.scale));
 579 #ifdef HAVE_TRACING
 580     TRACE_surf_link_set_bandwidth(date, m_name, sg_bandwidth_factor * p_power.peak * p_power.scale);
 581 #endif
 582     if (sg_weight_S_parameter > 0) {
 583       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 584         action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 585         action->m_weight += delta;
 586         if (!action->m_suspended)
 587           lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 588       }
 589     }
 590     if (tmgr_trace_event_free(event_type))
 591       p_power.event = NULL;
 592   } else if (event_type == p_latEvent) {
 593     double delta = value - m_latCurrent;
 594     lmm_variable_t var = NULL;
 595     lmm_element_t elem = NULL;
 596     NetworkCm02ActionLmmPtr action = NULL;
 597
 598     m_latCurrent = value;
 599     while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, p_constraint, &elem))) {
 600       action = (NetworkCm02ActionLmmPtr) lmm_variable_id(var);
 601       action->m_latCurrent += delta;
 602       action->m_weight += delta;
 603       if (action->m_rate < 0)
 604         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable, sg_tcp_gamma / (2.0 * action->m_latCurrent));
 605       else {
 606         lmm_update_variable_bound(p_model->p_maxminSystem, action->p_variable,
 607                                   min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 608
 609         if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 610           XBT_INFO("Flow is limited BYBANDWIDTH");
 611         } else {
 612           XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 613                    action->m_latCurrent);
 614         }
 615       }
 616       if (!action->m_suspended)
 617         lmm_update_variable_weight(p_model->p_maxminSystem, action->p_variable, action->m_weight);
 618
 619     }
 620     if (tmgr_trace_event_free(event_type))
 621       p_latEvent = NULL;
 622   } else if (event_type == p_stateEvent) {
 623     if (value > 0)
 624       p_stateCurrent = SURF_RESOURCE_ON;
 625     else {
 626       lmm_constraint_t cnst = p_constraint;
 627       lmm_variable_t var = NULL;
 628       lmm_element_t elem = NULL;
 629
 630       p_stateCurrent = SURF_RESOURCE_OFF;
 631       while ((var = lmm_get_var_from_cnst(p_model->p_maxminSystem, cnst, &elem))) {
 632         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 633
 634         if (action->getState() == SURF_ACTION_RUNNING ||
 635             action->getState() == SURF_ACTION_READY) {
 636           action->m_finish = date;
 637           action->setState(SURF_ACTION_FAILED);
 638         }
 639       }
 640     }
 641     if (tmgr_trace_event_free(event_type))
 642       p_stateEvent = NULL;
 643   } else {
 644     XBT_CRITICAL("Unknown event ! \n");
 645     xbt_abort();
 646   }
 647
 648   XBT_DEBUG
 649       ("There were a resource state event, need to update actions related to the constraint (%p)",
 650        p_constraint);
 651   return;
 652 }
 653
 654 /**********
 655  * Action *
 656  **********/
 657 void NetworkCm02ActionLmm::updateRemainingLazy(double now)
 658 {
 659   double delta = 0.0;
 660
 661   if (m_suspended != 0)
 662     return;
 663
 664   delta = now - m_lastUpdate;
 665
 666   if (m_remains > 0) {
 667     XBT_DEBUG("Updating action(%p): remains was %lf, last_update was: %lf", this, m_remains, m_lastUpdate);
 668     double_update(&(m_remains), m_lastValue * delta);
 669
 670     XBT_DEBUG("Updating action(%p): remains is now %lf", this, m_remains);
 671   }
 672
 673   if (m_maxDuration != NO_MAX_DURATION)
 674     double_update(&m_maxDuration, delta);
 675
 676   if (m_remains <= 0 &&
 677       (lmm_get_variable_weight(p_variable) > 0)) {
 678     m_finish = surf_get_clock();
 679     setState(SURF_ACTION_DONE);
 680
 681     heapRemove(p_model->p_actionHeap);
 682   } else if (((m_maxDuration != NO_MAX_DURATION)
 683       && (m_maxDuration <= 0))) {
 684     m_finish = surf_get_clock();
 685     setState(SURF_ACTION_DONE);
 686     heapRemove(p_model->p_actionHeap);
 687   }
 688
 689   m_lastUpdate = now;
 690   m_lastValue = lmm_variable_getvalue(p_variable);
 691 }
 692 void NetworkCm02ActionLmm::recycle()
 693 {
 694   return;
 695 }
 696