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 #ifdef HAVE_TRACING
 237     if (TRACE_is_enabled()) {
 238       int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 239       int i;
 240       for (i = 0; i < n; i++){
 241         lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 242                                                             action->getVariable(),
 243                                                             i);
 244         NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 245         TRACE_surf_link_set_utilization(link->getName(),
 246                                         action->getCategory(),
 247                                         (lmm_variable_getvalue(action->getVariable())*
 248                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 249                                                 action->getVariable(),
 250                                                 i)),
 251                                         action->getLastUpdate(),
 252                                         now - action->getLastUpdate());
 253       }
 254     }
 255 #endif
 256
 257     // if I am wearing a latency hat
 258     if (action->getHat() == LATENCY) {
 259       XBT_DEBUG("Latency paid for action %p. Activating", action);
 260       lmm_update_variable_weight(p_maxminSystem, action->getVariable(), action->m_weight);
 261       action->heapRemove(p_actionHeap);
 262       action->refreshLastUpdate();
 263
 264         // if I am wearing a max_duration or normal hat
 265     } else if (action->getHat() == MAX_DURATION ||
 266         action->getHat() == NORMAL) {
 267         // no need to communicate anymore
 268         // assume that flows that reached max_duration have remaining of 0
 269       XBT_DEBUG("Action %p finished", action);
 270       action->setRemains(0);
 271       action->finish();
 272       action->setState(SURF_ACTION_DONE);
 273       action->heapRemove(p_actionHeap);
 274
 275       action->gapRemove();
 276     }
 277   }
 278   return;
 279 }
 280
 281
 282 void NetworkCm02Model::updateActionsStateFull(double now, double delta)
 283 {
 284   NetworkCm02ActionPtr action;
 285   ActionListPtr running_actions = getRunningActionSet();
 286
 287   for(ActionList::iterator it(running_actions->begin()), itNext=it, itend(running_actions->end())
 288      ; it != itend ; it=itNext) {
 289         ++itNext;
 290
 291     action = (NetworkCm02ActionPtr) &*it;
 292     XBT_DEBUG("Something happened to action %p", action);
 293       double deltap = delta;
 294       if (action->m_latency > 0) {
 295         if (action->m_latency > deltap) {
 296           double_update(&(action->m_latency), deltap, sg_surf_precision);
 297           deltap = 0.0;
 298         } else {
 299           double_update(&(deltap), action->m_latency, sg_surf_precision);
 300           action->m_latency = 0.0;
 301         }
 302         if (action->m_latency == 0.0 && !(action->isSuspended()))
 303           lmm_update_variable_weight(p_maxminSystem, action->getVariable(),
 304               action->m_weight);
 305       }
 306   #ifdef HAVE_TRACING
 307       if (TRACE_is_enabled()) {
 308         int n = lmm_get_number_of_cnst_from_var(p_maxminSystem, action->getVariable());
 309         int i;
 310         for (i = 0; i < n; i++){
 311           lmm_constraint_t constraint = lmm_get_cnst_from_var(p_maxminSystem,
 312                                                             action->getVariable(),
 313                                                             i);
 314           NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(lmm_constraint_id(constraint));
 315           TRACE_surf_link_set_utilization(link->getName(),
 316                                         action->getCategory(),
 317                                         (lmm_variable_getvalue(action->getVariable())*
 318                                             lmm_get_cnst_weight_from_var(p_maxminSystem,
 319                                                 action->getVariable(),
 320                                                 i)),
 321                                         action->getLastUpdate(),
 322                                         now - action->getLastUpdate());
 323         }
 324       }
 325   #endif
 326       if (!lmm_get_number_of_cnst_from_var
 327           (p_maxminSystem, action->getVariable())) {
 328         /* There is actually no link used, hence an infinite bandwidth.
 329          * This happens often when using models like vivaldi.
 330          * In such case, just make sure that the action completes immediately.
 331          */
 332         action->updateRemains(action->getRemains());
 333       }
 334     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 335
 336     if (action->getMaxDuration() != NO_MAX_DURATION)
 337       action->updateMaxDuration(delta);
 338
 339     if ((action->getRemains() <= 0) &&
 340         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 341       action->finish();
 342       action->setState(SURF_ACTION_DONE);
 343       action->gapRemove();
 344     } else if (((action->getMaxDuration() != NO_MAX_DURATION)
 345         && (action->getMaxDuration() <= 0))) {
 346       action->finish();
 347       action->setState(SURF_ACTION_DONE);
 348       action->gapRemove();
 349     }
 350   }
 351   return;
 352 }
 353
 354 ActionPtr NetworkCm02Model::communicate(RoutingEdgePtr src, RoutingEdgePtr dst,
 355                                                 double size, double rate)
 356 {
 357   unsigned int i;
 358   void *_link;
 359   NetworkCm02LinkPtr link;
 360   int failed = 0;
 361   NetworkCm02ActionPtr action = NULL;
 362   double bandwidth_bound;
 363   double latency = 0.0;
 364   xbt_dynar_t back_route = NULL;
 365   int constraints_per_variable = 0;
 366
 367   xbt_dynar_t route = xbt_dynar_new(sizeof(RoutingEdgePtr), NULL);
 368
 369   XBT_IN("(%s,%s,%g,%g)", src->getName(), dst->getName(), size, rate);
 370
 371   routing_platf->getRouteAndLatency(src, dst, &route, &latency);
 372   xbt_assert(!xbt_dynar_is_empty(route) || latency,
 373              "You're trying to send data from %s to %s but there is no connection at all between these two hosts.",
 374              src->getName(), dst->getName());
 375
 376   xbt_dynar_foreach(route, i, _link) {
 377         link = static_cast<NetworkCm02LinkPtr>(_link);
 378     if (link->getState() == SURF_RESOURCE_OFF) {
 379       failed = 1;
 380       break;
 381     }
 382   }
 383   if (sg_network_crosstraffic == 1) {
 384           routing_platf->getRouteAndLatency(dst, src, &back_route, NULL);
 385     xbt_dynar_foreach(back_route, i, _link) {
 386       link = static_cast<NetworkCm02LinkPtr>(_link);
 387       if (link->getState() == SURF_RESOURCE_OFF) {
 388         failed = 1;
 389         break;
 390       }
 391     }
 392   }
 393
 394   action = new NetworkCm02Action(this, size, failed);
 395
 396 #ifdef HAVE_LATENCY_BOUND_TRACKING
 397   action->m_latencyLimited = 0;
 398 #endif
 399   action->m_weight = action->m_latency = latency;
 400
 401   action->m_rate = rate;
 402   if (p_updateMechanism == UM_LAZY) {
 403     action->m_indexHeap = -1;
 404     action->m_lastUpdate = surf_get_clock();
 405   }
 406
 407   bandwidth_bound = -1.0;
 408   if (sg_weight_S_parameter > 0) {
 409     xbt_dynar_foreach(route, i, _link) {
 410       link = static_cast<NetworkCm02LinkPtr>(_link);
 411       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 412     }
 413   }
 414   xbt_dynar_foreach(route, i, _link) {
 415         link = static_cast<NetworkCm02LinkPtr>(_link);
 416     double bb = bandwidthFactor(size) * link->getBandwidth(); //(link->p_power.peak * link->p_power.scale);
 417     bandwidth_bound =
 418         (bandwidth_bound < 0.0) ? bb : min(bandwidth_bound, bb);
 419   }
 420
 421   action->m_latCurrent = action->m_latency;
 422   action->m_latency *= latencyFactor(size);
 423   action->m_rate = bandwidthConstraint(action->m_rate, bandwidth_bound, size);
 424   if (m_haveGap) {
 425     xbt_assert(!xbt_dynar_is_empty(route),
 426                "Using a model with a gap (e.g., SMPI) with a platform without links (e.g. vivaldi)!!!");
 427
 428     link = *static_cast<NetworkCm02LinkPtr *>(xbt_dynar_get_ptr(route, 0));
 429     gapAppend(size, link, action);
 430     XBT_DEBUG("Comm %p: %s -> %s gap=%f (lat=%f)",
 431               action, src->getName(), dst->getName(), action->m_senderGap,
 432               action->m_latency);
 433   }
 434
 435   constraints_per_variable = xbt_dynar_length(route);
 436   if (back_route != NULL)
 437     constraints_per_variable += xbt_dynar_length(back_route);
 438
 439   if (action->m_latency > 0) {
 440     action->p_variable = lmm_variable_new(p_maxminSystem, action, 0.0, -1.0,
 441                          constraints_per_variable);
 442     if (p_updateMechanism == UM_LAZY) {
 443       // add to the heap the event when the latency is payed
 444       XBT_DEBUG("Added action (%p) one latency event at date %f", action,
 445                 action->m_latency + action->m_lastUpdate);
 446       action->heapInsert(p_actionHeap, action->m_latency + action->m_lastUpdate, xbt_dynar_is_empty(route) ? NORMAL : LATENCY);
 447     }
 448   } else
 449     action->p_variable = lmm_variable_new(p_maxminSystem, action, 1.0, -1.0, constraints_per_variable);
 450
 451   if (action->m_rate < 0) {
 452     lmm_update_variable_bound(p_maxminSystem, action->getVariable(), (action->m_latCurrent > 0) ? sg_tcp_gamma / (2.0 * action->m_latCurrent) : -1.0);
 453   } else {
 454     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);
 455   }
 456
 457   xbt_dynar_foreach(route, i, _link) {
 458         link = static_cast<NetworkCm02LinkPtr>(_link);
 459     lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), 1.0);
 460   }
 461
 462   if (sg_network_crosstraffic == 1) {
 463     XBT_DEBUG("Fullduplex active adding backward flow using 5%%");
 464     xbt_dynar_foreach(back_route, i, _link) {
 465       link = static_cast<NetworkCm02LinkPtr>(_link);
 466       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 467     }
 468   }
 469
 470   xbt_dynar_free(&route);
 471   XBT_OUT();
 472
 473   surf_callback_emit(networkCommunicateCallbacks, action, src, dst, size, rate);
 474   return action;
 475 }
 476
 477 void NetworkCm02Model::addTraces(){
 478   xbt_dict_cursor_t cursor = NULL;
 479   char *trace_name, *elm;
 480
 481   static int called = 0;
 482   if (called)
 483     return;
 484   called = 1;
 485
 486   /* connect all traces relative to network */
 487   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 488     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 489     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 490                             xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 491
 492     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 493                trace_name, elm);
 494     xbt_assert(trace,
 495                "Cannot connect trace %s to link %s: trace undefined",
 496                trace_name, elm);
 497
 498     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 499   }
 500
 501   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 502     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 503     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 504                                 xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 505
 506     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 507                trace_name, elm);
 508     xbt_assert(trace,
 509                "Cannot connect trace %s to link %s: trace undefined",
 510                trace_name, elm);
 511
 512     link->p_power.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 513   }
 514
 515   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 516     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 517     NetworkCm02LinkPtr link = static_cast<NetworkCm02LinkPtr>(
 518                             xbt_lib_get_or_null(link_lib, elm, SURF_LINK_LEVEL));
 519
 520     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 521                trace_name, elm);
 522     xbt_assert(trace,
 523                "Cannot connect trace %s to link %s: trace undefined",
 524                trace_name, elm);
 525
 526     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 527   }
 528 }
 529
 530 /************
 531  * Resource *
 532  ************/
 533 NetworkCm02Link::NetworkCm02Link(NetworkCm02ModelPtr model, const char *name, xbt_dict_t props,
 534                                    lmm_system_t system,
 535                                    double constraint_value,
 536                                    tmgr_history_t history,
 537                                    e_surf_resource_state_t state_init,
 538                                    tmgr_trace_t state_trace,
 539                                    double metric_peak,
 540                                    tmgr_trace_t metric_trace,
 541                                    double lat_initial,
 542                                    tmgr_trace_t lat_trace,
 543                                    e_surf_link_sharing_policy_t policy)
 544 : NetworkLink(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 545 {
 546   setState(state_init);
 547
 548   p_power.scale = 1.0;
 549   p_power.peak = metric_peak;
 550   if (metric_trace)
 551     p_power.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 552   else
 553     p_power.event = NULL;
 554
 555   m_latCurrent = lat_initial;
 556   if (lat_trace)
 557         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 558
 559   if (policy == SURF_LINK_FATPIPE)
 560         lmm_constraint_shared(getConstraint());
 561 }
 562
 563
 564
 565 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 566                                       double value, double date)
 567 {
 568   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 569   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 570   /*     value, event_type); */
 571
 572   if (event_type == p_power.event) {
 573     updateBandwidth(value, date);
 574     if (tmgr_trace_event_free(event_type))
 575       p_power.event = NULL;
 576   } else if (event_type == p_latEvent) {
 577     updateLatency(value, date);
 578     if (tmgr_trace_event_free(event_type))
 579       p_latEvent = NULL;
 580   } else if (event_type == p_stateEvent) {
 581     if (value > 0)
 582       setState(SURF_RESOURCE_ON);
 583     else {
 584       lmm_constraint_t cnst = getConstraint();
 585       lmm_variable_t var = NULL;
 586       lmm_element_t elem = NULL;
 587
 588       setState(SURF_RESOURCE_OFF);
 589       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 590         ActionPtr action = (ActionPtr) lmm_variable_id(var);
 591
 592         if (action->getState() == SURF_ACTION_RUNNING ||
 593             action->getState() == SURF_ACTION_READY) {
 594           action->setFinishTime(date);
 595           action->setState(SURF_ACTION_FAILED);
 596         }
 597       }
 598     }
 599     if (tmgr_trace_event_free(event_type))
 600       p_stateEvent = NULL;
 601   } else {
 602     XBT_CRITICAL("Unknown event ! \n");
 603     xbt_abort();
 604   }
 605
 606   XBT_DEBUG
 607       ("There were a resource state event, need to update actions related to the constraint (%p)",
 608        getConstraint());
 609   return;
 610 }
 611
 612 void NetworkCm02Link::updateBandwidth(double value, double date){
 613   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 614                  (p_power.peak * p_power.scale);
 615   lmm_variable_t var = NULL;
 616   lmm_element_t elem = NULL;
 617   lmm_element_t nextelem = NULL;
 618   int numelem = 0;
 619
 620   NetworkCm02ActionPtr action = NULL;
 621
 622   p_power.peak = value;
 623   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 624                               getConstraint(),
 625                               sg_bandwidth_factor *
 626                               (p_power.peak * p_power.scale));
 627 #ifdef HAVE_TRACING
 628   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_power.peak * p_power.scale);
 629 #endif
 630   if (sg_weight_S_parameter > 0) {
 631     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 632       action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 633       action->m_weight += delta;
 634       if (!action->isSuspended())
 635         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 636     }
 637   }
 638 }
 639
 640 void NetworkCm02Link::updateLatency(double value, double date){
 641   double delta = value - m_latCurrent;
 642   lmm_variable_t var = NULL;
 643   lmm_element_t elem = NULL;
 644   lmm_element_t nextelem = NULL;
 645   int numelem = 0;
 646   NetworkCm02ActionPtr action = NULL;
 647
 648   m_latCurrent = value;
 649   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 650     action = (NetworkCm02ActionPtr) lmm_variable_id(var);
 651     action->m_latCurrent += delta;
 652     action->m_weight += delta;
 653     if (action->m_rate < 0)
 654       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 655     else {
 656       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 657                                 min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 658
 659       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 660         XBT_INFO("Flow is limited BYBANDWIDTH");
 661       } else {
 662         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 663                  action->m_latCurrent);
 664       }
 665     }
 666     if (!action->isSuspended())
 667       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 668   }
 669 }
 670
 671 /**********
 672  * Action *
 673  **********/
 674 void NetworkCm02Action::updateRemainingLazy(double now)
 675 {
 676   double delta = 0.0;
 677
 678   if (m_suspended != 0)
 679     return;
 680
 681   delta = now - m_lastUpdate;
 682
 683   if (m_remains > 0) {
 684     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 685     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 686
 687     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 688   }
 689
 690   if (m_maxDuration != NO_MAX_DURATION)
 691     double_update(&m_maxDuration, delta, sg_surf_precision);
 692
 693   if (m_remains <= 0 &&
 694       (lmm_get_variable_weight(getVariable()) > 0)) {
 695     finish();
 696     setState(SURF_ACTION_DONE);
 697
 698     heapRemove(getModel()->getActionHeap());
 699   } else if (((m_maxDuration != NO_MAX_DURATION)
 700       && (m_maxDuration <= 0))) {
 701     finish();
 702     setState(SURF_ACTION_DONE);
 703     heapRemove(getModel()->getActionHeap());
 704   }
 705
 706   m_lastUpdate = now;
 707   m_lastValue = lmm_variable_getvalue(getVariable());
 708 }
 709 void NetworkCm02Action::recycle()
 710 {
 711   return;
 712 }
 713