src/surf/network_cm02.cpp

   1 /* Copyright (c) 2013-2014. 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 "network_cm02.hpp"
   8 #include "maxmin_private.hpp"
   9 #include "simgrid/sg_config.h"
  10
  11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
  12
  13 double sg_sender_gap = 0.0;
  14 double sg_latency_factor = 1.0; /* default value; can be set by model or from command line */
  15 double sg_bandwidth_factor = 1.0;       /* default value; can be set by model or from command line */
  16 double sg_weight_S_parameter = 0.0;     /* default value; can be set by model or from command line */
  17
  18 double sg_tcp_gamma = 0.0;
  19 int sg_network_crosstraffic = 0;
  20
  21 /*************
  22  * CallBacks *
  23  *************/
  24
  25 void net_define_callbacks(void)
  26 {
  27   /* Figuring out the network links */
  28   sg_platf_link_add_cb(netlink_parse_init);
  29   sg_platf_postparse_add_cb(net_add_traces);
  30 }
  31
  32 /*********
  33  * Model *
  34  *********/
  35
  36 /************************************************************************/
  37 /* New model based on optimizations discussed during Pedro Velho's thesis*/
  38 /************************************************************************/
  39 /* @techreport{VELHO:2011:HAL-00646896:1, */
  40 /*      url = {http://hal.inria.fr/hal-00646896/en/}, */
  41 /*      title = {{Flow-level network models: have we reached the limits?}}, */
  42 /*      author = {Velho, Pedro and Schnorr, Lucas and Casanova, Henri and Legrand, Arnaud}, */
  43 /*      type = {Rapport de recherche}, */
  44 /*      institution = {INRIA}, */
  45 /*      number = {RR-7821}, */
  46 /*      year = {2011}, */
  47 /*      month = Nov, */
  48 /*      pdf = {http://hal.inria.fr/hal-00646896/PDF/rr-validity.pdf}, */
  49 /*  } */
  50 void surf_network_model_init_LegrandVelho(void)
  51 {
  52   if (surf_network_model)
  53     return;
  54
  55   surf_network_model = new NetworkCm02Model();
  56   net_define_callbacks();
  57   ModelPtr model = surf_network_model;
  58   xbt_dynar_push(model_list, &model);
  59
  60   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor",
  61                             13.01);
  62   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  63                             0.97);
  64   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 20537);
  65 }
  66
  67 /***************************************************************************/
  68 /* The nice TCP sharing model designed by Loris Marchal and Henri Casanova */
  69 /***************************************************************************/
  70 /* @TechReport{      rr-lip2002-40, */
  71 /*   author        = {Henri Casanova and Loris Marchal}, */
  72 /*   institution   = {LIP}, */
  73 /*   title         = {A Network Model for Simulation of Grid Application}, */
  74 /*   number        = {2002-40}, */
  75 /*   month         = {oct}, */
  76 /*   year          = {2002} */
  77 /* } */
  78 void surf_network_model_init_CM02(void)
  79 {
  80
  81   if (surf_network_model)
  82     return;
  83
  84   surf_network_model = new NetworkCm02Model();
  85   net_define_callbacks();
  86   ModelPtr model = surf_network_model;
  87   xbt_dynar_push(model_list, &model);
  88
  89   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 1.0);
  90   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
  91                             1.0);
  92   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 0.0);
  93 }
  94
  95 /***************************************************************************/
  96 /* The models from Steven H. Low                                           */
  97 /***************************************************************************/
  98 /* @article{Low03,                                                         */
  99 /*   author={Steven H. Low},                                               */
 100 /*   title={A Duality Model of {TCP} and Queue Management Algorithms},     */
 101 /*   year={2003},                                                          */
 102 /*   journal={{IEEE/ACM} Transactions on Networking},                      */
 103 /*    volume={11}, number={4},                                             */
 104 /*  }                                                                      */
 105 void surf_network_model_init_Reno(void)
 106 {
 107   if (surf_network_model)
 108     return;
 109
 110   surf_network_model = new NetworkCm02Model();
 111   net_define_callbacks();
 112   ModelPtr model = surf_network_model;
 113   xbt_dynar_push(model_list, &model);
 114   lmm_set_default_protocol_function(func_reno_f, func_reno_fp,
 115                                     func_reno_fpi);
 116   surf_network_model->f_networkSolve = lagrange_solve;
 117
 118   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 119   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 120                             0.92);
 121   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 122 }
 123
 124
 125 void surf_network_model_init_Reno2(void)
 126 {
 127   if (surf_network_model)
 128     return;
 129
 130   surf_network_model = new NetworkCm02Model();
 131   net_define_callbacks();
 132   ModelPtr model = surf_network_model;
 133   xbt_dynar_push(model_list, &model);
 134   lmm_set_default_protocol_function(func_reno2_f, func_reno2_fp,
 135                                     func_reno2_fpi);
 136   surf_network_model->f_networkSolve = lagrange_solve;
 137
 138   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 139   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 140                             0.92);
 141   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S_parameter",
 142                             8775);
 143 }
 144
 145 void surf_network_model_init_Vegas(void)
 146 {
 147   if (surf_network_model)
 148     return;
 149
 150   surf_network_model = new NetworkCm02Model();
 151   net_define_callbacks();
 152   ModelPtr model = surf_network_model;
 153   xbt_dynar_push(model_list, &model);
 154   lmm_set_default_protocol_function(func_vegas_f, func_vegas_fp,
 155                                     func_vegas_fpi);
 156   surf_network_model->f_networkSolve = lagrange_solve;
 157
 158   xbt_cfg_setdefault_double(_sg_cfg_set, "network/latency_factor", 10.4);
 159   xbt_cfg_setdefault_double(_sg_cfg_set, "network/bandwidth_factor",
 160                             0.92);
 161   xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
 162 }
 163
 164 void NetworkCm02Model::initialize()
 165 {
 166   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 167   int select =
 168       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 169
 170   if (!strcmp(optim, "Full")) {
 171     p_updateMechanism = UM_FULL;
 172     m_selectiveUpdate = select;
 173   } else if (!strcmp(optim, "Lazy")) {
 174     p_updateMechanism = UM_LAZY;
 175     m_selectiveUpdate = 1;
 176     xbt_assert((select == 1)
 177                ||
 178                (xbt_cfg_is_default_value
 179                 (_sg_cfg_set, "network/maxmin_selective_update")),
 180                "Disabling selective update while using the lazy update mechanism is dumb!");
 181   } else {
 182     xbt_die("Unsupported optimization (%s) for this model", optim);
 183   }
 184
 185   if (!p_maxminSystem)
 186         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 187
 188   const char* lb_name = "__loopback__";
 189   routing_model_create(createNetworkLink(lb_name,
 190                                                    498000000, NULL, 0.000015, NULL,
 191                                                    SURF_RESOURCE_ON, NULL,
 192                                                    SURF_LINK_FATPIPE, NULL));
 193
 194   if (p_updateMechanism == UM_LAZY) {
 195         p_actionHeap = xbt_heap_new(8, NULL);
 196         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 197         p_modifiedSet = new ActionLmmList();
 198         p_maxminSystem->keep_track = p_modifiedSet;
 199   }
 200
 201   m_haveGap = false;
 202 }
 203
 204 NetworkLinkPtr NetworkCm02Model::createNetworkLink(const char *name,
 205                                  double bw_initial,
 206                                  tmgr_trace_t bw_trace,
 207                                  double lat_initial,
 208                                  tmgr_trace_t lat_trace,
 209                                  e_surf_resource_state_t state_initial,
 210                                  tmgr_trace_t state_trace,
 211                                  e_surf_link_sharing_policy_t policy,
 212                                  xbt_dict_t properties)
 213 {
 214   xbt_assert(!xbt_lib_get_or_null(link_lib, name, SURF_LINK_LEVEL),
 215              "Link '%s' declared several times in the platform file.",
 216              name);
 217
 218   NetworkCm02LinkPtr nw_link =
 219                   new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 220                                                  state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 221
 222
 223   xbt_lib_set(link_lib, name, SURF_LINK_LEVEL, nw_link);
 224   XBT_DEBUG("Create link '%s'",name);
 225
 226   return nw_link;
 227 }
 228
 229 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 230 {
 231   NetworkCm02ActionPtr action;
 232   while ((xbt_heap_size(p_actionHeap) > 0)
 233          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 234     action = (NetworkCm02ActionPtr) xbt_heap_pop(p_actionHeap);
 235     XBT_DEBUG("Something happened to action %p", action);
 236     if (TRACE_is_enabled()) {
 237       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 238       int i;
 239       for (i = 0; i < n; i++){
 240         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 241                                                             action->getVariable(),
 242                                                             i);
 243         NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 244         TRACE_surf_link_set_utilization(link->getName(),
 245                                         action->getCategory(),
 246                                         (lmm_variable_getvalue(action->getVariable())*
 247                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 248                                                 action->getVariable(),
 249                                                 i)),
 250                                         action->getLastUpdate(),
 251                                         now - action->getLastUpdate());
 252       }
 253     }
 254
 255     // if I am wearing a latency hat
 256     if (action->getHat() == LATENCY) {
 257       XBT_DEBUG("Latency paid for action %p. Activating", action);
 258       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 259       action->heapRemove(p_actionHeap);
 260       action->refreshLastUpdate();
 261
 262         // if I am wearing a max_duration or normal hat
 263     } else if (action->getHat() == MAX_DURATION ||
 264         action->getHat() == NORMAL) {
 265         // no need to communicate anymore
 266         // assume that flows that reached max_duration have remaining of 0
 267       XBT_DEBUG("Action %p finished", action);
 268       action->setRemains(0);
 269       action->finish();
 270       action->setState(SURF_ACTION_DONE);
 271       action->heapRemove(p_actionHeap);
 272
 273       action->gapRemove();
 274     }
 275   }
 276   return;
 277 }
 278
 279
 280 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 281 {
 282   NetworkCm02ActionPtr action;
 283   ActionListPtr running_actions = getRunningActionSet();
 284
 285   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 286      ; it != itend ; it=itNext) {
 287         ++itNext;
 288
 289     action = (NetworkCm02ActionPtr) &*it;
 290     XBT_DEBUG("Something happened to action %p", action);
 291       double deltap = delta;
 292       if (action->m_latency > 0) {
 293         if (action->m_latency > deltap) {
 294           double_update(&(action->m_latency), deltap, sg_surf_precision);
 295           deltap = 0.0;
 296         } else {
 297           double_update(&(deltap), action->m_latency, sg_surf_precision);
 298           action->m_latency = 0.0;
 299         }
 300         if (action->m_latency == 0.0 && !(action->isSuspended()))
 301           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 302               action->m_weight);
 303       }
 304       if (TRACE_is_enabled()) {
 305         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 306         int i;
 307         for (i = 0; i < n; i++){
 308           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 309                                                             action->getVariable(),
 310                                                             i);
 311           NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 312           TRACE_surf_link_set_utilization(link->getName(),
 313                                         action->getCategory(),
 314                                         (lmm_variable_getvalue(action->getVariable())*
 315                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 316                                                 action->getVariable(),
 317                                                 i)),
 318                                         action->getLastUpdate(),
 319                                         now - action->getLastUpdate());
 320         }
 321       }
 322       if (!lmm_get_number_of_cnst_from_var
 323           (p_maxminSystem, action->getVariable())) {
 324         /* There is actually no link used, hence an infinite bandwidth.
 325          * This happens often when using models like vivaldi.
 326          * In such case, just make sure that the action completes immediately.
 327          */
 328         action->updateRemains(action->getRemains());
 329       }
 330     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 331
 332     if (action->getMaxDuration() != NO_MAX_DURATION)
 333       action->updateMaxDuration(delta);
 334
 335     if ((action->getRemains() <= 0) &&
 336         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 337       action->finish();
 338       action->setState(SURF_ACTION_DONE);
 339       action->gapRemove();
 340     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 341         && (action->getMaxDuration() <= 0))) {
 342       action->finish();
 343       action->setState(SURF_ACTION_DONE);
 344       action->gapRemove();
 345     }
 346   }
 347   return;
 348 }
 349
 350 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 351                                                 double size, double rate)
 352 {
 353   unsigned int i;
 354   void *_link;
 355   NetworkCm02LinkPtr link;
 356   int failed = 0;
 357   NetworkCm02ActionPtr action = NULL;
 358   double bandwidth_bound;
 359   double latency = 0.0;
 360   xbt_dynar_t back_route = NULL;
 361   int constraints_per_variable = 0;
 362
 363   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 364
 365   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 366
 367   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 368   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 369              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 370              src->getName(), dst->getName());
 371
 372   xbt_dynar_foreach(route, i, _link) {
 373         link = static_cast<NetworkCm02LinkPtr>(_link);
 374     if (link->getState() == SURF_RESOURCE_OFF) {
 375       failed = 1;
 376       break;
 377     }
 378   }
 379   if (sg_network_crosstraffic == 1) {
 380           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 381     xbt_dynar_foreach(back_route, i, _link) {
 382       link = static_cast<NetworkCm02LinkPtr>(_link);
 383       if (link->getState() == SURF_RESOURCE_OFF) {
 384         failed = 1;
 385         break;
 386       }
 387     }
 388   }
 389
 390   action = new NetworkCm02Action(this, size, failed);
 391
 392 #ifdef HAVE_LATENCY_BOUND_TRACKING
 393   action->m_latencyLimited = 0;
 394 #endif
 395   action->m_weight = action->m_latency = latency;
 396
 397   action->m_rate = rate;
 398   if (p_updateMechanism == UM_LAZY) {
 399     action->m_indexHeap = -1;
 400     action->m_lastUpdate = surf_get_clock();
 401   }
 402
 403   bandwidth_bound = -1.0;
 404   if (sg_weight_S_parameter > 0) {
 405     xbt_dynar_foreach(route, i, _link) {
 406       link = static_cast<NetworkCm02LinkPtr>(_link);
 407       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 408     }
 409   }
 410   xbt_dynar_foreach(route, i, _link) {
 411         link = static_cast<NetworkCm02LinkPtr>(_link);
 412     double bb = bandwidthFactor(size) * link->getBandwidth(); //(link->p_power.peak * link->p_power.scale);
 413     bandwidth_bound =
 414         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 415   }
 416
 417   action->m_latCurrent = action->m_latency;
 418   action->m_latency *= latencyFactor(size);
 419   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 420   if (m_haveGap) {
 421     xbt_assert(!xbt_dynar_is_empty(route),
 422                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 423
 424     link = *static_cast<NetworkCm02LinkPtr *>(xbt_dynar_get_ptr(route, 0));
 425     gapAppend(size, link, action);
 426     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 427               action, src->getName(), dst->getName(), action->m_senderGap,
 428               action->m_latency);
 429   }
 430
 431   constraints_per_variable = xbt_dynar_length(route);
 432   if (back_route != NULL)
 433     constraints_per_variable += xbt_dynar_length(back_route);
 434
 435   if (action->m_latency > 0) {
 436     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 437                          constraints_per_variable);
 438     if (p_updateMechanism == UM_LAZY) {
 439       // add to the heap the event when the latency is payed
 440       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 441                 action->m_latency + action->m_lastUpdate);
 442       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 443     }
 444   } else
 445     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 446
 447   if (action->m_rate < 0) {
 448     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 449   } else {
 450     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)) : action->m_rate);
 451   }
 452
 453   xbt_dynar_foreach(route, i, _link) {
 454         link = static_cast<NetworkCm02LinkPtr>(_link);
 455     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 456   }
 457
 458   if (sg_network_crosstraffic == 1) {
 459     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 460     xbt_dynar_foreach(back_route, i, _link) {
 461       link = static_cast<NetworkCm02LinkPtr>(_link);
 462       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 463     }
 464   }
 465
 466   xbt_dynar_free(&route);
 467   XBT_OUT();
 468
 469   surf_callback_emit(networkCommunicateCallbacks, action, src, dst, size, rate);
 470   return action;
 471 }
 472
 473 void NetworkCm02Model::addTraces(){
 474   xbt_dict_cursor_t cursor = NULL;
 475   char *trace_name, *elm;
 476
 477   static int called = 0;
 478   if (called)
 479     return;
 480   called = 1;
 481
 482   /* connect all traces relative to network */
 483   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 484     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 485     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 486                             xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 487
 488     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 489                trace_name, elm);
 490     xbt_assert(trace,
 491                "Cannot connect trace %s to link %s: trace undefined",
 492                trace_name, elm);
 493
 494     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 495   }
 496
 497   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 498     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 499     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 500                                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 501
 502     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 503                trace_name, elm);
 504     xbt_assert(trace,
 505                "Cannot connect trace %s to link %s: trace undefined",
 506                trace_name, elm);
 507
 508     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 509   }
 510
 511   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 512     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 513     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 514                             xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 515
 516     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 517                trace_name, elm);
 518     xbt_assert(trace,
 519                "Cannot connect trace %s to link %s: trace undefined",
 520                trace_name, elm);
 521
 522     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 523   }
 524 }
 525
 526 /************
 527  * Resource *
 528  ************/
 529 NetworkCm02Link::NetworkCm02Link(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 530                                    lmm_system_t system,
 531                                    double constraint_value,
 532                                    tmgr_history_t history,
 533                                    e_surf_resource_state_t state_init,
 534                                    tmgr_trace_t state_trace,
 535                                    double metric_peak,
 536                                    tmgr_trace_t metric_trace,
 537                                    double lat_initial,
 538                                    tmgr_trace_t lat_trace,
 539                                    e_surf_link_sharing_policy_t policy)
 540 : NetworkLink(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 541 {
 542   setState(state_init);
 543
 544   p_power.scale = 1.0;
 545   p_power.peak = metric_peak;
 546   if (metric_trace)
 547     p_power.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 548   else
 549     p_power.event = NULL;
 550
 551   m_latCurrent = lat_initial;
 552   if (lat_trace)
 553         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 554
 555   if (policy == SURF_LINK_FATPIPE)
 556         lmm_constraint_shared(getConstraint());
 557 }
 558
 559
 560
 561 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 562                                       double value, double date)
 563 {
 564   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 565   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 566   /*     value, event_type); */
 567
 568   if (event_type == p_power.event) {
 569     updateBandwidth(value, date);
 570     if (tmgr_trace_event_free(event_type))
 571       p_power.event = NULL;
 572   } else if (event_type == p_latEvent) {
 573     updateLatency(value, date);
 574     if (tmgr_trace_event_free(event_type))
 575       p_latEvent = NULL;
 576   } else if (event_type == p_stateEvent) {
 577     if (value > 0)
 578       setState(SURF_RESOURCE_ON);
 579     else {
 580       lmm_constraint_t cnst = getConstraint();
 581       lmm_variable_t var = NULL;
 582       lmm_element_t elem = NULL;
 583
 584       setState(SURF_RESOURCE_OFF);
 585       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 586         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 587
 588         if (action->getState() == SURF_ACTION_RUNNING ||
 589             action->getState() == SURF_ACTION_READY) {
 590           action->setFinishTime(date);
 591           action->setState(SURF_ACTION_FAILED);
 592         }
 593       }
 594     }
 595     if (tmgr_trace_event_free(event_type))
 596       p_stateEvent = NULL;
 597   } else {
 598     XBT_CRITICAL("Unknown event ! \n");
 599     xbt_abort();
 600   }
 601
 602   XBT_DEBUG
 603       ("There were a resource state event, need to update actions related to the constraint (%p)",
 604        getConstraint());
 605   return;
 606 }
 607
 608 void NetworkCm02Link::updateBandwidth(double value, double date){
 609   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 610                  (p_power.peak * p_power.scale);
 611   lmm_variable_t var = NULL;
 612   lmm_element_t elem = NULL;
 613   lmm_element_t nextelem = NULL;
 614   int numelem = 0;
 615
 616   NetworkCm02ActionPtr action = NULL;
 617
 618   p_power.peak = value;
 619   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 620                               getConstraint(),
 621                               sg_bandwidth_factor *
 622                               (p_power.peak * p_power.scale));
 623   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_power.peak * p_power.scale);
 624   if (sg_weight_S_parameter > 0) {
 625     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 626       action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 627       action->m_weight += delta;
 628       if (!action->isSuspended())
 629         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 630     }
 631   }
 632 }
 633
 634 void NetworkCm02Link::updateLatency(double value, double date){
 635   double delta = value - m_latCurrent;
 636   lmm_variable_t var = NULL;
 637   lmm_element_t elem = NULL;
 638   lmm_element_t nextelem = NULL;
 639   int numelem = 0;
 640   NetworkCm02ActionPtr action = NULL;
 641
 642   m_latCurrent = value;
 643   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 644     action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 645     action->m_latCurrent += delta;
 646     action->m_weight += delta;
 647     if (action->m_rate < 0)
 648       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 649     else {
 650       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 651                                 min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 652
 653       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 654         XBT_INFO("Flow is limited BYBANDWIDTH");
 655       } else {
 656         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 657                  action->m_latCurrent);
 658       }
 659     }
 660     if (!action->isSuspended())
 661       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 662   }
 663 }
 664
 665 /**********
 666  * Action *
 667  **********/
 668 void NetworkCm02Action::updateRemainingLazy(double now)
 669 {
 670   double delta = 0.0;
 671
 672   if (m_suspended != 0)
 673     return;
 674
 675   delta = now - m_lastUpdate;
 676
 677   if (m_remains > 0) {
 678     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 679     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 680
 681     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 682   }
 683
 684   if (m_maxDuration != NO_MAX_DURATION)
 685     double_update(&m_maxDuration, delta, sg_surf_precision);
 686
 687   if (m_remains <= 0 &&
 688       (lmm_get_variable_weight(getVariable()) > 0)) {
 689     finish();
 690     setState(SURF_ACTION_DONE);
 691
 692     heapRemove(getModel()->getActionHeap());
 693   } else if (((m_maxDuration != NO_MAX_DURATION)
 694       && (m_maxDuration <= 0))) {
 695     finish();
 696     setState(SURF_ACTION_DONE);
 697     heapRemove(getModel()->getActionHeap());
 698   }
 699
 700   m_lastUpdate = now;
 701   m_lastValue = lmm_variable_getvalue(getVariable());
 702 }
 703 void NetworkCm02Action::recycle()
 704 {
 705   return;
 706 }
 707