src/surf/network_cm02.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include <algorithm>
   8
   9 #include "network_cm02.hpp"
  10 #include "maxmin_private.hpp"
  11 #include "simgrid/sg_config.h"
  12
  13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  14
  15 double sg_sender_gap = 0.0;
  16 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  17 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  18 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  19
  20 double sg_tcp_gamma = 0.0;
  21 int sg_network_crosstraffic = 0;
  22
  23 /*************
  24  * CallBacks *
  25  *************/
  26
  27 void net_define_callbacks(void)
  28 {
  29   /* Figuring out the network links */
  30   sg_platf_link_add_cb(netlink_parse_init);
  31   sg_platf_postparse_add_cb(net_add_traces);
  32 }
  33
  34 /*********
  35  * Model *
  36  *********/
  37
  38 /************************************************************************/
  39 /* New model based on optimizations discussed during Pedro Velho's thesis*/
  40 /************************************************************************/
  41 /* @techreport{VELHO:2011:HAL-00646896:1, */
  42 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
  43 /*      title = {{Flow-level network models: have we reached the limits?}}, */
  44 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
  45 /*      type = {Rapport de recherche}, */
  46 /*      institution = {INRIA}, */
  47 /*      number = {RR-7821}, */
  48 /*      year = {2011}, */
  49 /*      month = Nov, */
  50 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
  51 /*  } */
  52 void surf_network_model_init_LegrandVelho(void)
  53 {
  54   if (surf_network_model)
  55     return;
  56
  57   surf_network_model = new NetworkCm02Model();
  58   net_define_callbacks();
  59   Model *model = surf_network_model;
  60   xbt_dynar_push(all_existing_models, &model);
  61
  62   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
  63                             13.01);
  64   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  65                             0.97);
  66   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
  67 }
  68
  69 /***************************************************************************/
  70 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
  71 /***************************************************************************/
  72 /* @TechReport{      rr-lip2002-40, */
  73 /*   author        = {Henri Casanova and Loris Marchal}, */
  74 /*   institution   = {LIP}, */
  75 /*   title         = {A Network Model for Simulation of Grid Application}, */
  76 /*   number        = {2002-40}, */
  77 /*   month         = {oct}, */
  78 /*   year          = {2002} */
  79 /* } */
  80 void surf_network_model_init_CM02(void)
  81 {
  82
  83   if (surf_network_model)
  84     return;
  85
  86   surf_network_model = new NetworkCm02Model();
  87   net_define_callbacks();
  88   Model *model = surf_network_model;
  89   xbt_dynar_push(all_existing_models, &model);
  90
  91   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
  92   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  93                             1.0);
  94   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
  95 }
  96
  97 /***************************************************************************/
  98 /* The models from Steven H. Low                                           */
  99 /***************************************************************************/
 100 /* @article{Low03,                                                         */
 101 /*   author={Steven H. Low},                                               */
 102 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 103 /*   year={2003},                                                          */
 104 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 105 /*    volume={11}, number={4},                                             */
 106 /*  }                                                                      */
 107 void surf_network_model_init_Reno(void)
 108 {
 109   if (surf_network_model)
 110     return;
 111
 112   surf_network_model = new NetworkCm02Model();
 113   net_define_callbacks();
 114   Model *model = surf_network_model;
 115   xbt_dynar_push(all_existing_models, &model);
 116   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 117                                     func_reno_fpi);
 118   surf_network_model->f_networkSolve = lagrange_solve;
 119
 120   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 121   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 122                             0.92);
 123   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 124 }
 125
 126
 127 void surf_network_model_init_Reno2(void)
 128 {
 129   if (surf_network_model)
 130     return;
 131
 132   surf_network_model = new NetworkCm02Model();
 133   net_define_callbacks();
 134   Model *model = surf_network_model;
 135   xbt_dynar_push(all_existing_models, &model);
 136   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 137                                     func_reno2_fpi);
 138   surf_network_model->f_networkSolve = lagrange_solve;
 139
 140   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 141   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 142                             0.92);
 143   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S",
 144                             8775);
 145 }
 146
 147 void surf_network_model_init_Vegas(void)
 148 {
 149   if (surf_network_model)
 150     return;
 151
 152   surf_network_model = new NetworkCm02Model();
 153   net_define_callbacks();
 154   Model *model = surf_network_model;
 155   xbt_dynar_push(all_existing_models, &model);
 156   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 157                                     func_vegas_fpi);
 158   surf_network_model->f_networkSolve = lagrange_solve;
 159
 160   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 161   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 162                             0.92);
 163   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 164 }
 165
 166 NetworkCm02Model::NetworkCm02Model()
 167         :NetworkModel()
 168 {
 169   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 170   int select =
 171       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 172
 173   if (!strcmp(optim, "Full")) {
 174     p_updateMechanism = UM_FULL;
 175     m_selectiveUpdate = select;
 176   } else if (!strcmp(optim, "Lazy")) {
 177     p_updateMechanism = UM_LAZY;
 178     m_selectiveUpdate = 1;
 179     xbt_assert((select == 1)
 180                ||
 181                (xbt_cfg_is_default_value
 182                 (_sg_cfg_set, "network/maxmin_selective_update")),
 183                "Disabling selective update while using the lazy update mechanism is dumb!");
 184   } else {
 185     xbt_die("Unsupported optimization (%s) for this model", optim);
 186   }
 187
 188   if (!p_maxminSystem)
 189         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 190
 191   routing_model_create(createLink("__loopback__",
 192                                       498000000, NULL, 0.000015, NULL,
 193                                       SURF_RESOURCE_ON, NULL,
 194                                       SURF_LINK_FATPIPE, NULL));
 195
 196   if (p_updateMechanism == UM_LAZY) {
 197         p_actionHeap = xbt_heap_new(8, NULL);
 198         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 199         p_modifiedSet = new ActionLmmList();
 200         p_maxminSystem->keep_track = p_modifiedSet;
 201   }
 202
 203   m_haveGap = false;
 204 }
 205
 206 Link* NetworkCm02Model::createLink(const char *name,
 207                                  double bw_initial,
 208                                  tmgr_trace_t bw_trace,
 209                                  double lat_initial,
 210                                  tmgr_trace_t lat_trace,
 211                                  e_surf_resource_state_t state_initial,
 212                                  tmgr_trace_t state_trace,
 213                                  e_surf_link_sharing_policy_t policy,
 214                                  xbt_dict_t properties)
 215 {
 216   xbt_assert(NULL == Link::byName(name),
 217              "Link '%s' declared several times in the platform",
 218              name);
 219
 220   Link* link = new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 221                                              state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 222   surf_callback_emit(networkLinkCreatedCallbacks, link);
 223   return link;
 224 }
 225
 226 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 227 {
 228   NetworkCm02Action *action;
 229   while ((xbt_heap_size(p_actionHeap) > 0)
 230          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 231     action = static_cast<NetworkCm02Action*> (xbt_heap_pop(p_actionHeap));
 232     XBT_DEBUG("Something happened to action %p", action);
 233     if (TRACE_is_enabled()) {
 234       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 235       int i;
 236       for (i = 0; i < n; i++){
 237         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 238                                                             action->getVariable(),
 239                                                             i);
 240         NetworkCm02Link *link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 241         TRACE_surf_link_set_utilization(link->getName(),
 242                                         action->getCategory(),
 243                                         (lmm_variable_getvalue(action->getVariable())*
 244                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 245                                                 action->getVariable(),
 246                                                 i)),
 247                                         action->getLastUpdate(),
 248                                         now - action->getLastUpdate());
 249       }
 250     }
 251
 252     // if I am wearing a latency hat
 253     if (action->getHat() == LATENCY) {
 254       XBT_DEBUG("Latency paid for action %p. Activating", action);
 255       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 256       action->heapRemove(p_actionHeap);
 257       action->refreshLastUpdate();
 258
 259         // if I am wearing a max_duration or normal hat
 260     } else if (action->getHat() == MAX_DURATION ||
 261         action->getHat() == NORMAL) {
 262         // no need to communicate anymore
 263         // assume that flows that reached max_duration have remaining of 0
 264       XBT_DEBUG("Action %p finished", action);
 265       action->setRemains(0);
 266       action->finish();
 267       action->setState(SURF_ACTION_DONE);
 268       action->heapRemove(p_actionHeap);
 269
 270       action->gapRemove();
 271     }
 272   }
 273   return;
 274 }
 275
 276
 277 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 278 {
 279   NetworkCm02Action *action;
 280   ActionList *running_actions = getRunningActionSet();
 281
 282   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 283      ; it != itend ; it=itNext) {
 284         ++itNext;
 285
 286     action = static_cast<NetworkCm02Action*> (&*it);
 287     XBT_DEBUG("Something happened to action %p", action);
 288       double deltap = delta;
 289       if (action->m_latency > 0) {
 290         if (action->m_latency > deltap) {
 291           double_update(&(action->m_latency), deltap, sg_surf_precision);
 292           deltap = 0.0;
 293         } else {
 294           double_update(&(deltap), action->m_latency, sg_surf_precision);
 295           action->m_latency = 0.0;
 296         }
 297         if (action->m_latency == 0.0 && !(action->isSuspended()))
 298           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 299               action->m_weight);
 300       }
 301       if (TRACE_is_enabled()) {
 302         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 303         int i;
 304         for (i = 0; i < n; i++){
 305           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 306                                                             action->getVariable(),
 307                                                             i);
 308           NetworkCm02Link* link = static_cast<NetworkCm02Link*>(lmm_constraint_id(constraint));
 309           TRACE_surf_link_set_utilization(link->getName(),
 310                                         action->getCategory(),
 311                                         (lmm_variable_getvalue(action->getVariable())*
 312                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 313                                                 action->getVariable(),
 314                                                 i)),
 315                                         action->getLastUpdate(),
 316                                         now - action->getLastUpdate());
 317         }
 318       }
 319       if (!lmm_get_number_of_cnst_from_var
 320           (p_maxminSystem, action->getVariable())) {
 321         /* There is actually no link used, hence an infinite bandwidth.
 322          * This happens often when using models like vivaldi.
 323          * In such case, just make sure that the action completes immediately.
 324          */
 325         action->updateRemains(action->getRemains());
 326       }
 327     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 328
 329     if (action->getMaxDuration() != NO_MAX_DURATION)
 330       action->updateMaxDuration(delta);
 331
 332     if ((action->getRemains() <= 0) &&
 333         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 334       action->finish();
 335       action->setState(SURF_ACTION_DONE);
 336       action->gapRemove();
 337     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 338         && (action->getMaxDuration() <= 0))) {
 339       action->finish();
 340       action->setState(SURF_ACTION_DONE);
 341       action->gapRemove();
 342     }
 343   }
 344   return;
 345 }
 346
 347 Action *NetworkCm02Model::communicate(RoutingEdge *src, RoutingEdge *dst,
 348                                                 double size, double rate)
 349 {
 350   unsigned int i;
 351   void *_link;
 352   NetworkCm02Link *link;
 353   int failed = 0;
 354   NetworkCm02Action *action = NULL;
 355   double bandwidth_bound;
 356   double latency = 0.0;
 357   xbt_dynar_t back_route = NULL;
 358   int constraints_per_variable = 0;
 359
 360   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdge*), NULL);
 361
 362   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 363
 364   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 365   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 366              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 367              src->getName(), dst->getName());
 368
 369   xbt_dynar_foreach(route, i, _link) {
 370         link = static_cast<NetworkCm02Link*>(_link);
 371     if (link->getState() == SURF_RESOURCE_OFF) {
 372       failed = 1;
 373       break;
 374     }
 375   }
 376   if (sg_network_crosstraffic == 1) {
 377           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 378     xbt_dynar_foreach(back_route, i, _link) {
 379       link = static_cast<NetworkCm02Link*>(_link);
 380       if (link->getState() == SURF_RESOURCE_OFF) {
 381         failed = 1;
 382         break;
 383       }
 384     }
 385   }
 386
 387   action = new NetworkCm02Action(this, size, failed);
 388
 389 #ifdef HAVE_LATENCY_BOUND_TRACKING
 390   action->m_latencyLimited = 0;
 391 #endif
 392   action->m_weight = action->m_latency = latency;
 393
 394   action->m_rate = rate;
 395   if (p_updateMechanism == UM_LAZY) {
 396     action->m_indexHeap = -1;
 397     action->m_lastUpdate = surf_get_clock();
 398   }
 399
 400   bandwidth_bound = -1.0;
 401   if (sg_weight_S_parameter > 0) {
 402     xbt_dynar_foreach(route, i, _link) {
 403       link = static_cast<NetworkCm02Link*>(_link);
 404       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 405     }
 406   }
 407   xbt_dynar_foreach(route, i, _link) {
 408         link = static_cast<NetworkCm02Link*>(_link);
 409     double bb = bandwidthFactor(size) * link->getBandwidth();
 410     bandwidth_bound =
 411         (bandwidth_bound < 0.0) ? bb : std::min(bandwidth_bound, bb);
 412   }
 413
 414   action->m_latCurrent = action->m_latency;
 415   action->m_latency *= latencyFactor(size);
 416   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 417   if (m_haveGap) {
 418     xbt_assert(!xbt_dynar_is_empty(route),
 419                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 420
 421     link = *static_cast<NetworkCm02Link **>(xbt_dynar_get_ptr(route, 0));
 422     gapAppend(size, link, action);
 423     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 424               action, src->getName(), dst->getName(), action->m_senderGap,
 425               action->m_latency);
 426   }
 427
 428   constraints_per_variable = xbt_dynar_length(route);
 429   if (back_route != NULL)
 430     constraints_per_variable += xbt_dynar_length(back_route);
 431
 432   if (action->m_latency > 0) {
 433     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 434                          constraints_per_variable);
 435     if (p_updateMechanism == UM_LAZY) {
 436       // add to the heap the event when the latency is payed
 437       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 438                 action->m_latency + action->m_lastUpdate);
 439       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 440     }
 441   } else
 442     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 443
 444   if (action->m_rate < 0) {
 445     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 446   } else {
 447     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)) : action->m_rate);
 448   }
 449
 450   xbt_dynar_foreach(route, i, _link) {
 451         link = static_cast<NetworkCm02Link*>(_link);
 452     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 453   }
 454
 455   if (sg_network_crosstraffic == 1) {
 456     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 457     xbt_dynar_foreach(back_route, i, _link) {
 458       link = static_cast<NetworkCm02Link*>(_link);
 459       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 460     }
 461   }
 462
 463   xbt_dynar_free(&route);
 464   XBT_OUT();
 465
 466   surf_callback_emit(networkCommunicateCallbacks, action, src, dst, size, rate);
 467   return action;
 468 }
 469
 470 void NetworkCm02Model::addTraces(){
 471   xbt_dict_cursor_t cursor = NULL;
 472   char *trace_name, *elm;
 473
 474   static int called = 0;
 475   if (called)
 476     return;
 477   called = 1;
 478
 479   /* connect all traces relative to network */
 480   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 481     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 482     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 483
 484     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 485                trace_name, elm);
 486     xbt_assert(trace,
 487                "Cannot connect trace %s to link %s: trace undefined",
 488                trace_name, elm);
 489
 490     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 491   }
 492
 493   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 494     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 495     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 496
 497     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 498                trace_name, elm);
 499     xbt_assert(trace,
 500                "Cannot connect trace %s to link %s: trace undefined",
 501                trace_name, elm);
 502
 503     link->p_speed.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 504   }
 505
 506   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 507     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 508     NetworkCm02Link *link = static_cast<NetworkCm02Link*>(Link::byName(elm));;
 509
 510     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 511                trace_name, elm);
 512     xbt_assert(trace,
 513                "Cannot connect trace %s to link %s: trace undefined",
 514                trace_name, elm);
 515
 516     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 517   }
 518 }
 519
 520 /************
 521  * Resource *
 522  ************/
 523 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model *model, const char *name, xbt_dict_t props,
 524                                    lmm_system_t system,
 525                                    double constraint_value,
 526                                    tmgr_history_t history,
 527                                    e_surf_resource_state_t state_init,
 528                                    tmgr_trace_t state_trace,
 529                                    double metric_peak,
 530                                    tmgr_trace_t metric_trace,
 531                                    double lat_initial,
 532                                    tmgr_trace_t lat_trace,
 533                                    e_surf_link_sharing_policy_t policy)
 534 : Link(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 535 {
 536   setState(state_init);
 537
 538   p_speed.scale = 1.0;
 539   p_speed.peak = metric_peak;
 540   if (metric_trace)
 541     p_speed.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 542   else
 543     p_speed.event = NULL;
 544
 545   m_latCurrent = lat_initial;
 546   if (lat_trace)
 547         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 548
 549   if (policy == SURF_LINK_FATPIPE)
 550         lmm_constraint_shared(getConstraint());
 551 }
 552
 553
 554
 555 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 556                                       double value, double date)
 557 {
 558   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 559   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 560   /*     value, event_type); */
 561
 562   if (event_type == p_speed.event) {
 563     updateBandwidth(value, date);
 564     if (tmgr_trace_event_free(event_type))
 565       p_speed.event = NULL;
 566   } else if (event_type == p_latEvent) {
 567     updateLatency(value, date);
 568     if (tmgr_trace_event_free(event_type))
 569       p_latEvent = NULL;
 570   } else if (event_type == p_stateEvent) {
 571     if (value > 0)
 572       setState(SURF_RESOURCE_ON);
 573     else {
 574       lmm_constraint_t cnst = getConstraint();
 575       lmm_variable_t var = NULL;
 576       lmm_element_t elem = NULL;
 577
 578       setState(SURF_RESOURCE_OFF);
 579       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 580         Action *action = static_cast<Action*>( lmm_variable_id(var) );
 581
 582         if (action->getState() == SURF_ACTION_RUNNING ||
 583             action->getState() == SURF_ACTION_READY) {
 584           action->setFinishTime(date);
 585           action->setState(SURF_ACTION_FAILED);
 586         }
 587       }
 588     }
 589     if (tmgr_trace_event_free(event_type))
 590       p_stateEvent = NULL;
 591   } else {
 592     XBT_CRITICAL("Unknown event ! \n");
 593     xbt_abort();
 594   }
 595
 596   XBT_DEBUG
 597       ("There were a resource state event, need to update actions related to the constraint (%p)",
 598        getConstraint());
 599   return;
 600 }
 601
 602 void NetworkCm02Link::updateBandwidth(double value, double date){
 603   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 604                  (p_speed.peak * p_speed.scale);
 605   lmm_variable_t var = NULL;
 606   lmm_element_t elem = NULL;
 607   lmm_element_t nextelem = NULL;
 608   int numelem = 0;
 609
 610   NetworkCm02Action *action = NULL;
 611
 612   p_speed.peak = value;
 613   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 614                               getConstraint(),
 615                               sg_bandwidth_factor *
 616                               (p_speed.peak * p_speed.scale));
 617   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_speed.peak * p_speed.scale);
 618   if (sg_weight_S_parameter > 0) {
 619     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 620       action = (NetworkCm02Action*) lmm_variable_id(var);
 621       action->m_weight += delta;
 622       if (!action->isSuspended())
 623         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 624     }
 625   }
 626 }
 627
 628 void NetworkCm02Link::updateLatency(double value, double date){
 629   double delta = value - m_latCurrent;
 630   lmm_variable_t var = NULL;
 631   lmm_element_t elem = NULL;
 632   lmm_element_t nextelem = NULL;
 633   int numelem = 0;
 634   NetworkCm02Action *action = NULL;
 635
 636   m_latCurrent = value;
 637   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 638     action = (NetworkCm02Action*) lmm_variable_id(var);
 639     action->m_latCurrent += delta;
 640     action->m_weight += delta;
 641     if (action->m_rate < 0)
 642       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 643     else {
 644       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 645                                 std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 646
 647       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 648         XBT_INFO("Flow is limited BYBANDWIDTH");
 649       } else {
 650         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 651                  action->m_latCurrent);
 652       }
 653     }
 654     if (!action->isSuspended())
 655       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 656   }
 657 }
 658
 659 /**********
 660  * Action *
 661  **********/
 662 void NetworkCm02Action::updateRemainingLazy(double now)
 663 {
 664   double delta = 0.0;
 665
 666   if (m_suspended != 0)
 667     return;
 668
 669   delta = now - m_lastUpdate;
 670
 671   if (m_remains > 0) {
 672     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 673     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 674
 675     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 676   }
 677
 678   if (m_maxDuration != NO_MAX_DURATION)
 679     double_update(&m_maxDuration, delta, sg_surf_precision);
 680
 681   if (m_remains <= 0 &&
 682       (lmm_get_variable_weight(getVariable()) > 0)) {
 683     finish();
 684     setState(SURF_ACTION_DONE);
 685
 686     heapRemove(getModel()->getActionHeap());
 687   } else if (((m_maxDuration != NO_MAX_DURATION)
 688       && (m_maxDuration <= 0))) {
 689     finish();
 690     setState(SURF_ACTION_DONE);
 691     heapRemove(getModel()->getActionHeap());
 692   }
 693
 694   m_lastUpdate = now;
 695   m_lastValue = lmm_variable_getvalue(getVariable());
 696 }
 697