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 simgrid::surf::NetworkCm02Model();
  58   net_define_callbacks();
  59   simgrid::surf::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 simgrid::surf::NetworkCm02Model();
  87   net_define_callbacks();
  88   simgrid::surf::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 simgrid::surf::NetworkCm02Model();
 113   net_define_callbacks();
 114   simgrid::surf::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 simgrid::surf::NetworkCm02Model();
 133   net_define_callbacks();
 134   simgrid::surf::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 simgrid::surf::NetworkCm02Model();
 153   net_define_callbacks();
 154   simgrid::surf::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 namespace simgrid {
 167 namespace surf {
 168
 169 NetworkCm02Model::NetworkCm02Model()
 170         :NetworkModel()
 171 {
 172   char *optim = xbt_cfg_get_string(_sg_cfg_set, "network/optim");
 173   int select =
 174       xbt_cfg_get_boolean(_sg_cfg_set, "network/maxmin_selective_update");
 175
 176   if (!strcmp(optim, "Full")) {
 177     p_updateMechanism = UM_FULL;
 178     m_selectiveUpdate = select;
 179   } else if (!strcmp(optim, "Lazy")) {
 180     p_updateMechanism = UM_LAZY;
 181     m_selectiveUpdate = 1;
 182     xbt_assert((select == 1)
 183                ||
 184                (xbt_cfg_is_default_value
 185                 (_sg_cfg_set, "network/maxmin_selective_update")),
 186                "Disabling selective update while using the lazy update mechanism is dumb!");
 187   } else {
 188     xbt_die("Unsupported optimization (%s) for this model", optim);
 189   }
 190
 191   if (!p_maxminSystem)
 192         p_maxminSystem = lmm_system_new(m_selectiveUpdate);
 193
 194   routing_model_create(createLink("__loopback__",
 195                                       498000000, NULL, 0.000015, NULL,
 196                                       SURF_RESOURCE_ON, NULL,
 197                                       SURF_LINK_FATPIPE, NULL));
 198
 199   if (p_updateMechanism == UM_LAZY) {
 200         p_actionHeap = xbt_heap_new(8, NULL);
 201         xbt_heap_set_update_callback(p_actionHeap, surf_action_lmm_update_index_heap);
 202         p_modifiedSet = new ActionLmmList();
 203         p_maxminSystem->keep_track = p_modifiedSet;
 204   }
 205
 206   m_haveGap = false;
 207 }
 208
 209 Link* NetworkCm02Model::createLink(const char *name,
 210                                  double bw_initial,
 211                                  tmgr_trace_t bw_trace,
 212                                  double lat_initial,
 213                                  tmgr_trace_t lat_trace,
 214                                  e_surf_resource_state_t state_initial,
 215                                  tmgr_trace_t state_trace,
 216                                  e_surf_link_sharing_policy_t policy,
 217                                  xbt_dict_t properties)
 218 {
 219   xbt_assert(NULL == Link::byName(name),
 220              "Link '%s' declared several times in the platform",
 221              name);
 222
 223   Link* link = new NetworkCm02Link(this, name, properties, p_maxminSystem, sg_bandwidth_factor * bw_initial, history,
 224                                              state_initial, state_trace, bw_initial, bw_trace, lat_initial, lat_trace, policy);
 225   networkLinkCreatedCallbacks(link);
 226   return link;
 227 }
 228
 229 void NetworkCm02Model::updateActionsStateLazy(double now, double /*delta*/)
 230 {
 231   NetworkCm02Action *action;
 232   while ((xbt_heap_size(p_actionHeap) > 0)
 233          && (double_equals(xbt_heap_maxkey(p_actionHeap), now, sg_surf_precision))) {
 234     action = static_cast<NetworkCm02Action*> (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         NetworkCm02Link *link = static_cast<NetworkCm02Link*>(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   NetworkCm02Action *action;
 283   ActionList *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 = static_cast<NetworkCm02Action*> (&*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           NetworkCm02Link* link = static_cast<NetworkCm02Link*>(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 Action *NetworkCm02Model::communicate(RoutingEdge *src, RoutingEdge *dst,
 351                                                 double size, double rate)
 352 {
 353   unsigned int i;
 354   void *_link;
 355   NetworkCm02Link *link;
 356   int failed = 0;
 357   NetworkCm02Action *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(RoutingEdge*), 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<NetworkCm02Link*>(_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<NetworkCm02Link*>(_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<NetworkCm02Link*>(_link);
 407       action->m_weight += sg_weight_S_parameter / link->getBandwidth();
 408     }
 409   }
 410   xbt_dynar_foreach(route, i, _link) {
 411         link = static_cast<NetworkCm02Link*>(_link);
 412     double bb = bandwidthFactor(size) * link->getBandwidth();
 413     bandwidth_bound =
 414         (bandwidth_bound < 0.0) ? bb : std::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<NetworkCm02Link **>(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) ? std::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<NetworkCm02Link*>(_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<NetworkCm02Link*>(_link);
 462       lmm_expand(p_maxminSystem, link->getConstraint(), action->getVariable(), .05);
 463     }
 464   }
 465
 466   xbt_dynar_free(&route);
 467   XBT_OUT();
 468
 469   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     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 486
 487     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 488                trace_name, elm);
 489     xbt_assert(trace,
 490                "Cannot connect trace %s to link %s: trace undefined",
 491                trace_name, elm);
 492
 493     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 494   }
 495
 496   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 497     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 498     NetworkCm02Link *link = static_cast<NetworkCm02Link*>( Link::byName(elm) );
 499
 500     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 501                trace_name, elm);
 502     xbt_assert(trace,
 503                "Cannot connect trace %s to link %s: trace undefined",
 504                trace_name, elm);
 505
 506     link->p_speed.event = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 507   }
 508
 509   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 510     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 511     NetworkCm02Link *link = static_cast<NetworkCm02Link*>(Link::byName(elm));;
 512
 513     xbt_assert(link, "Cannot connect trace %s to link %s: link undefined",
 514                trace_name, elm);
 515     xbt_assert(trace,
 516                "Cannot connect trace %s to link %s: trace undefined",
 517                trace_name, elm);
 518
 519     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 520   }
 521 }
 522
 523 /************
 524  * Resource *
 525  ************/
 526 NetworkCm02Link::NetworkCm02Link(NetworkCm02Model *model, const char *name, xbt_dict_t props,
 527                                    lmm_system_t system,
 528                                    double constraint_value,
 529                                    tmgr_history_t history,
 530                                    e_surf_resource_state_t state_init,
 531                                    tmgr_trace_t state_trace,
 532                                    double metric_peak,
 533                                    tmgr_trace_t metric_trace,
 534                                    double lat_initial,
 535                                    tmgr_trace_t lat_trace,
 536                                    e_surf_link_sharing_policy_t policy)
 537 : Link(model, name, props, lmm_constraint_new(system, this, constraint_value), history, state_trace)
 538 {
 539   setState(state_init);
 540
 541   p_speed.scale = 1.0;
 542   p_speed.peak = metric_peak;
 543   if (metric_trace)
 544     p_speed.event = tmgr_history_add_trace(history, metric_trace, 0.0, 0, this);
 545   else
 546     p_speed.event = NULL;
 547
 548   m_latCurrent = lat_initial;
 549   if (lat_trace)
 550         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 551
 552   if (policy == SURF_LINK_FATPIPE)
 553         lmm_constraint_shared(getConstraint());
 554 }
 555
 556
 557
 558 void NetworkCm02Link::updateState(tmgr_trace_event_t event_type,
 559                                       double value, double date)
 560 {
 561   /*   printf("[" "%g" "] Asking to update network card \"%s\" with value " */
 562   /*     "%g" " for event %p\n", surf_get_clock(), nw_link->name, */
 563   /*     value, event_type); */
 564
 565   if (event_type == p_speed.event) {
 566     updateBandwidth(value, date);
 567     if (tmgr_trace_event_free(event_type))
 568       p_speed.event = NULL;
 569   } else if (event_type == p_latEvent) {
 570     updateLatency(value, date);
 571     if (tmgr_trace_event_free(event_type))
 572       p_latEvent = NULL;
 573   } else if (event_type == p_stateEvent) {
 574     if (value > 0)
 575       setState(SURF_RESOURCE_ON);
 576     else {
 577       lmm_constraint_t cnst = getConstraint();
 578       lmm_variable_t var = NULL;
 579       lmm_element_t elem = NULL;
 580
 581       setState(SURF_RESOURCE_OFF);
 582       while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), cnst, &elem))) {
 583         Action *action = static_cast<Action*>( lmm_variable_id(var) );
 584
 585         if (action->getState() == SURF_ACTION_RUNNING ||
 586             action->getState() == SURF_ACTION_READY) {
 587           action->setFinishTime(date);
 588           action->setState(SURF_ACTION_FAILED);
 589         }
 590       }
 591     }
 592     if (tmgr_trace_event_free(event_type))
 593       p_stateEvent = NULL;
 594   } else {
 595     XBT_CRITICAL("Unknown event ! \n");
 596     xbt_abort();
 597   }
 598
 599   XBT_DEBUG
 600       ("There were a resource state event, need to update actions related to the constraint (%p)",
 601        getConstraint());
 602   return;
 603 }
 604
 605 void NetworkCm02Link::updateBandwidth(double value, double date){
 606   double delta = sg_weight_S_parameter / value - sg_weight_S_parameter /
 607                  (p_speed.peak * p_speed.scale);
 608   lmm_variable_t var = NULL;
 609   lmm_element_t elem = NULL;
 610   lmm_element_t nextelem = NULL;
 611   int numelem = 0;
 612
 613   NetworkCm02Action *action = NULL;
 614
 615   p_speed.peak = value;
 616   lmm_update_constraint_bound(getModel()->getMaxminSystem(),
 617                               getConstraint(),
 618                               sg_bandwidth_factor *
 619                               (p_speed.peak * p_speed.scale));
 620   TRACE_surf_link_set_bandwidth(date, getName(), sg_bandwidth_factor * p_speed.peak * p_speed.scale);
 621   if (sg_weight_S_parameter > 0) {
 622     while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 623       action = (NetworkCm02Action*) lmm_variable_id(var);
 624       action->m_weight += delta;
 625       if (!action->isSuspended())
 626         lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 627     }
 628   }
 629 }
 630
 631 void NetworkCm02Link::updateLatency(double value, double date){
 632   double delta = value - m_latCurrent;
 633   lmm_variable_t var = NULL;
 634   lmm_element_t elem = NULL;
 635   lmm_element_t nextelem = NULL;
 636   int numelem = 0;
 637   NetworkCm02Action *action = NULL;
 638
 639   m_latCurrent = value;
 640   while ((var = lmm_get_var_from_cnst_safe(getModel()->getMaxminSystem(), getConstraint(), &elem, &nextelem, &numelem))) {
 641     action = (NetworkCm02Action*) lmm_variable_id(var);
 642     action->m_latCurrent += delta;
 643     action->m_weight += delta;
 644     if (action->m_rate < 0)
 645       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(), sg_tcp_gamma / (2.0 * action->m_latCurrent));
 646     else {
 647       lmm_update_variable_bound(getModel()->getMaxminSystem(), action->getVariable(),
 648                                 std::min(action->m_rate, sg_tcp_gamma / (2.0 * action->m_latCurrent)));
 649
 650       if (action->m_rate < sg_tcp_gamma / (2.0 * action->m_latCurrent)) {
 651         XBT_INFO("Flow is limited BYBANDWIDTH");
 652       } else {
 653         XBT_INFO("Flow is limited BYLATENCY, latency of flow is %f",
 654                  action->m_latCurrent);
 655       }
 656     }
 657     if (!action->isSuspended())
 658       lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), action->m_weight);
 659   }
 660 }
 661
 662 /**********
 663  * Action *
 664  **********/
 665 void NetworkCm02Action::updateRemainingLazy(double now)
 666 {
 667   double delta = 0.0;
 668
 669   if (m_suspended != 0)
 670     return;
 671
 672   delta = now - m_lastUpdate;
 673
 674   if (m_remains > 0) {
 675     XBT_DEBUG("Updating action(%p): remains was %f, last_update was: %f", this, m_remains, m_lastUpdate);
 676     double_update(&(m_remains), m_lastValue * delta, sg_maxmin_precision*sg_surf_precision);
 677
 678     XBT_DEBUG("Updating action(%p): remains is now %f", this, m_remains);
 679   }
 680
 681   if (m_maxDuration != NO_MAX_DURATION)
 682     double_update(&m_maxDuration, delta, sg_surf_precision);
 683
 684   if (m_remains <= 0 &&
 685       (lmm_get_variable_weight(getVariable()) > 0)) {
 686     finish();
 687     setState(SURF_ACTION_DONE);
 688
 689     heapRemove(getModel()->getActionHeap());
 690   } else if (((m_maxDuration != NO_MAX_DURATION)
 691       && (m_maxDuration <= 0))) {
 692     finish();
 693     setState(SURF_ACTION_DONE);
 694     heapRemove(getModel()->getActionHeap());
 695   }
 696
 697   m_lastUpdate = now;
 698   m_lastValue = lmm_variable_getvalue(getVariable());
 699 }
 700
 701 }
 702 }