src/surf/host_ptask_L07.cpp

   1 /* Copyright (c) 2007-2010, 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 "host_ptask_L07.hpp"
   8
   9 #include "cpu_interface.hpp"
  10 #include "surf_routing.hpp"
  11 #include "xbt/lib.h"
  12
  13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
  14
  15 static int ptask_host_count = 0;
  16 static xbt_dict_t ptask_parallel_task_link_set = NULL;
  17 lmm_system_t ptask_maxmin_system = NULL;
  18
  19
  20 /**************************************/
  21 /*** Resource Creation & Destruction **/
  22 /**************************************/
  23
  24 static void ptask_netlink_parse_init(sg_platf_link_cbarg_t link)
  25 {
  26   netlink_parse_init(link);
  27   current_property_set = NULL;
  28 }
  29
  30 void surf_host_model_init_ptask_L07(void)
  31 {
  32   XBT_INFO("Switching to the L07 model to handle parallel tasks.");
  33   xbt_assert(!surf_cpu_model_pm, "CPU model type already defined");
  34   xbt_assert(!surf_network_model, "network model type already defined");
  35
  36   // Define the callbacks to parse the XML
  37   sg_platf_link_add_cb(ptask_netlink_parse_init);
  38   sg_platf_postparse_add_cb(host_add_traces);
  39
  40   surf_host_model = new HostL07Model();
  41   Model *model = surf_host_model;
  42   xbt_dynar_push(all_existing_models, &model);
  43 }
  44
  45
  46 HostL07Model::HostL07Model() : HostModel() {
  47   if (!ptask_maxmin_system)
  48         ptask_maxmin_system = lmm_system_new(1);
  49   surf_host_model = NULL;
  50   surf_network_model = new NetworkL07Model(this);
  51   surf_cpu_model_pm = new CpuL07Model(this);
  52
  53   routing_model_create(surf_network_model->createLink("__loopback__",
  54                                                           498000000, NULL,
  55                                                           0.000015, NULL,
  56                                                           SURF_RESOURCE_ON, NULL,
  57                                                           SURF_LINK_FATPIPE, NULL));
  58 }
  59
  60 HostL07Model::~HostL07Model() {
  61   xbt_dict_free(&ptask_parallel_task_link_set);
  62
  63   delete surf_cpu_model_pm;
  64   delete surf_network_model;
  65   ptask_host_count = 0;
  66
  67   if (ptask_maxmin_system) {
  68     lmm_system_free(ptask_maxmin_system);
  69     ptask_maxmin_system = NULL;
  70   }
  71 }
  72
  73 double HostL07Model::shareResources(double /*now*/)
  74 {
  75   L07Action *action;
  76
  77   ActionList *running_actions = getRunningActionSet();
  78   double min = this->shareResourcesMaxMin(running_actions,
  79                                               ptask_maxmin_system,
  80                                               bottleneck_solve);
  81
  82   for(ActionList::iterator it(running_actions->begin()), itend(running_actions->end())
  83          ; it != itend ; ++it) {
  84         action = static_cast<L07Action*>(&*it);
  85     if (action->m_latency > 0) {
  86       if (min < 0) {
  87         min = action->m_latency;
  88         XBT_DEBUG("Updating min (value) with %p (start %f): %f", action,
  89                action->getStartTime(), min);
  90       } else if (action->m_latency < min) {
  91         min = action->m_latency;
  92         XBT_DEBUG("Updating min (latency) with %p (start %f): %f", action,
  93                action->getStartTime(), min);
  94       }
  95     }
  96   }
  97
  98   XBT_DEBUG("min value : %f", min);
  99
 100   return min;
 101 }
 102
 103 void HostL07Model::updateActionsState(double /*now*/, double delta) {
 104
 105   L07Action *action;
 106   ActionList *actionSet = getRunningActionSet();
 107
 108   for(ActionList::iterator it = actionSet->begin(), itNext = it
 109          ; it != actionSet->end()
 110          ; it =  itNext) {
 111         ++itNext;
 112     action = static_cast<L07Action*>(&*it);
 113     if (action->m_latency > 0) {
 114       if (action->m_latency > delta) {
 115         double_update(&(action->m_latency), delta, sg_surf_precision);
 116       } else {
 117         action->m_latency = 0.0;
 118       }
 119       if ((action->m_latency == 0.0) && (action->isSuspended() == 0)) {
 120         action->updateBound();
 121         lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 1.0);
 122       }
 123     }
 124     XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
 125            action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
 126     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 127
 128     if (action->getMaxDuration() != NO_MAX_DURATION)
 129       action->updateMaxDuration(delta);
 130
 131     XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
 132
 133     /* In the next if cascade, the action can be finished either because:
 134      *  - The amount of remaining work reached 0
 135      *  - The max duration was reached
 136      * If it's not done, it may have failed.
 137      */
 138
 139     if ((action->getRemains() <= 0) &&
 140         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 141       action->finish();
 142       action->setState(SURF_ACTION_DONE);
 143     } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
 144                (action->getMaxDuration() <= 0)) {
 145       action->finish();
 146       action->setState(SURF_ACTION_DONE);
 147     } else {
 148       /* Need to check that none of the model has failed */
 149       lmm_constraint_t cnst = NULL;
 150       int i = 0;
 151
 152       while ((cnst = lmm_get_cnst_from_var(ptask_maxmin_system, action->getVariable(), i++))) {
 153         void *constraint_id = lmm_constraint_id(cnst);
 154
 155         if (static_cast<Host*>(constraint_id)->getState() == SURF_RESOURCE_OFF) {
 156           XBT_DEBUG("Action (%p) Failed!!", action);
 157           action->finish();
 158           action->setState(SURF_ACTION_FAILED);
 159           break;
 160         }
 161       }
 162     }
 163   }
 164   return;
 165 }
 166
 167 Action *HostL07Model::executeParallelTask(int host_nb,
 168                                           sg_host_t*host_list,
 169                                                                                   double *flops_amount,
 170                                                                                   double *bytes_amount,
 171                                                                                   double rate)
 172 {
 173   L07Action *action = new L07Action(this, 1, 0);
 174   unsigned int cpt;
 175   int nb_link = 0;
 176   int nb_host = 0;
 177   double latency = 0.0;
 178
 179   action->p_edgeList->reserve(host_nb);
 180   for (int i = 0; i<host_nb; i++)
 181           action->p_edgeList->push_back(sg_host_edge(host_list[i]));
 182
 183   if (ptask_parallel_task_link_set == NULL)
 184     ptask_parallel_task_link_set = xbt_dict_new_homogeneous(NULL);
 185
 186   xbt_dict_reset(ptask_parallel_task_link_set);
 187
 188   /* Compute the number of affected resources... */
 189   for (int i = 0; i < host_nb; i++) {
 190     for (int j = 0; j < host_nb; j++) {
 191       xbt_dynar_t route=NULL;
 192
 193       if (bytes_amount[i * host_nb + j] > 0) {
 194         double lat=0.0;
 195         unsigned int cpt;
 196         void *_link;
 197         LinkL07 *link;
 198
 199         routing_platf->getRouteAndLatency((*action->p_edgeList)[i], (*action->p_edgeList)[j],
 200                                                   &route, &lat);
 201         latency = MAX(latency, lat);
 202
 203         xbt_dynar_foreach(route, cpt, _link) {
 204            link = static_cast<LinkL07*>(_link);
 205            xbt_dict_set(ptask_parallel_task_link_set, link->getName(), link, NULL);
 206         }
 207       }
 208     }
 209   }
 210
 211   nb_link = xbt_dict_length(ptask_parallel_task_link_set);
 212   xbt_dict_reset(ptask_parallel_task_link_set);
 213
 214   for (int i = 0; i < host_nb; i++)
 215     if (flops_amount[i] > 0)
 216       nb_host++;
 217
 218   XBT_DEBUG("Creating a parallel task (%p) with %d cpus and %d links.",
 219          action, host_nb, nb_link);
 220   action->m_suspended = 0; /* valgrind seems to want it despite the calloc... */
 221   action->p_computationAmount = flops_amount;
 222   action->p_communicationAmount = bytes_amount;
 223   action->m_latency = latency;
 224   action->m_rate = rate;
 225
 226   action->p_variable = lmm_variable_new(ptask_maxmin_system, action, 1.0,
 227                                         (rate > 0 ? rate : -1.0),
 228                                                                                 host_nb + nb_link);
 229
 230   if (action->m_latency > 0)
 231     lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 232
 233   for (int i = 0; i < host_nb; i++)
 234     lmm_expand(ptask_maxmin_system,
 235                sg_host_surfcpu(host_list[i])->getConstraint(),
 236                action->getVariable(), flops_amount[i]);
 237
 238   for (int i = 0; i < host_nb; i++) {
 239     for (int j = 0; j < host_nb; j++) {
 240       void *_link;
 241
 242       xbt_dynar_t route=NULL;
 243       if (bytes_amount[i * host_nb + j] == 0.0)
 244         continue;
 245
 246       routing_platf->getRouteAndLatency((*action->p_edgeList)[i], (*action->p_edgeList)[j],
 247                                             &route, NULL);
 248
 249       xbt_dynar_foreach(route, cpt, _link) {
 250         LinkL07 *link = static_cast<LinkL07*>(_link);
 251         lmm_expand_add(ptask_maxmin_system, link->getConstraint(),
 252                        action->getVariable(),
 253                        bytes_amount[i * host_nb + j]);
 254       }
 255     }
 256   }
 257
 258   if (nb_link + nb_host == 0) {
 259     action->setCost(1.0);
 260     action->setRemains(0.0);
 261   }
 262
 263   return action;
 264 }
 265
 266 Host *HostL07Model::createHost(const char *name)
 267 {
 268   HostL07 *wk = NULL;
 269   sg_host_t sg_host = sg_host_by_name(name);
 270
 271   xbt_assert(!surf_host_resource_priv(sg_host),
 272               "Host '%s' declared several times in the platform file.",
 273               name);
 274
 275   wk = new HostL07(this, name, NULL,
 276                                   sg_host_edge(sg_host),
 277                                                   sg_host_surfcpu(sg_host));
 278   surf_callback_emit(hostCreatedCallbacks, wk);
 279   xbt_lib_set(host_lib, name, SURF_HOST_LEVEL, wk);
 280
 281   return wk;
 282 }
 283
 284 Action *NetworkL07Model::communicate(RoutingEdge *src, RoutingEdge *dst,
 285                                        double size, double rate)
 286 {
 287   sg_host_t*host_list = xbt_new0(sg_host_t, 2);
 288   double *flops_amount = xbt_new0(double, 2);
 289   double *bytes_amount = xbt_new0(double, 4);
 290   Action *res = NULL;
 291
 292   host_list[0] = sg_host_by_name(src->getName());
 293   host_list[1] = sg_host_by_name(dst->getName());
 294   bytes_amount[1] = size;
 295
 296   res = p_hostModel->executeParallelTask(2, host_list,
 297                                     flops_amount,
 298                                     bytes_amount, rate);
 299
 300   return res;
 301 }
 302
 303 xbt_dynar_t HostL07Model::getRoute(Host *src, Host *dst)
 304 {
 305   xbt_dynar_t route=NULL;
 306   routing_platf->getRouteAndLatency(src->p_netElm, dst->p_netElm, &route, NULL);
 307   return route;
 308 }
 309
 310 Cpu *CpuL07Model::createCpu(const char *name,  xbt_dynar_t powerPeak,
 311                           int pstate, double power_scale,
 312                           tmgr_trace_t power_trace, int core,
 313                           e_surf_resource_state_t state_initial,
 314                           tmgr_trace_t state_trace,
 315                           xbt_dict_t cpu_properties)
 316 {
 317   double power_initial = xbt_dynar_get_as(powerPeak, pstate, double);
 318   sg_host_t sg_host = sg_host_by_name(name);
 319
 320   xbt_assert(!surf_host_resource_priv(sg_host),
 321               "Host '%s' declared several times in the platform file.",
 322               name);
 323
 324   CpuL07 *cpu = new CpuL07(this, name, cpu_properties,
 325                                      power_initial, power_scale, power_trace,
 326                          core, state_initial, state_trace);
 327   sg_host_surfcpu_register(sg_host, cpu);
 328   return cpu;
 329 }
 330
 331 Link* NetworkL07Model::createLink(const char *name,
 332                                  double bw_initial,
 333                                  tmgr_trace_t bw_trace,
 334                                  double lat_initial,
 335                                  tmgr_trace_t lat_trace,
 336                                  e_surf_resource_state_t state_initial,
 337                                  tmgr_trace_t state_trace,
 338                                  e_surf_link_sharing_policy_t policy,
 339                                  xbt_dict_t properties)
 340 {
 341   xbt_assert(!Link::byName(name),
 342                  "Link '%s' declared several times in the platform file.", name);
 343
 344   Link* link = new LinkL07(this, name, properties,
 345                              bw_initial, bw_trace,
 346                                          lat_initial, lat_trace,
 347                                          state_initial, state_trace,
 348                                          policy);
 349   surf_callback_emit(networkLinkCreatedCallbacks, link);
 350   return link;
 351 }
 352
 353 void HostL07Model::addTraces()
 354 {
 355   xbt_dict_cursor_t cursor = NULL;
 356   char *trace_name, *elm;
 357
 358   if (!trace_connect_list_host_avail)
 359     return;
 360
 361   /* Connect traces relative to cpu */
 362   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 363     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 364     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 365
 366     xbt_assert(host, "Host %s undefined", elm);
 367     xbt_assert(trace, "Trace %s undefined", trace_name);
 368
 369     host->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 370   }
 371
 372   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 373     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 374     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 375
 376     xbt_assert(host, "Host %s undefined", elm);
 377     xbt_assert(trace, "Trace %s undefined", trace_name);
 378
 379     host->p_powerEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 380   }
 381
 382   /* Connect traces relative to network */
 383   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 384     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 385     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 386
 387     xbt_assert(link, "Link %s undefined", elm);
 388     xbt_assert(trace, "Trace %s undefined", trace_name);
 389
 390     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 391   }
 392
 393   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 394     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 395     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 396
 397     xbt_assert(link, "Link %s undefined", elm);
 398     xbt_assert(trace, "Trace %s undefined", trace_name);
 399
 400     link->p_bwEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 401   }
 402
 403   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 404     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 405     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 406
 407     xbt_assert(link, "Link %s undefined", elm);
 408     xbt_assert(trace, "Trace %s undefined", trace_name);
 409
 410     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 411   }
 412 }
 413
 414 /************
 415  * Resource *
 416  ************/
 417
 418 HostL07::HostL07(HostModel *model, const char* name, xbt_dict_t props, RoutingEdge *netElm, Cpu *cpu)
 419   : Host(model, name, props, NULL, netElm, cpu)
 420 {
 421 }
 422
 423 double HostL07::getPowerPeakAt(int /*pstate_index*/)
 424 {
 425         THROW_UNIMPLEMENTED;
 426 }
 427
 428 int HostL07::getNbPstates()
 429 {
 430         THROW_UNIMPLEMENTED;
 431 }
 432
 433 void HostL07::setPstate(int /*pstate_index*/)
 434 {
 435         THROW_UNIMPLEMENTED;
 436 }
 437
 438 int HostL07::getPstate()
 439 {
 440         THROW_UNIMPLEMENTED;
 441 }
 442
 443 double HostL07::getConsumedEnergy()
 444 {
 445         THROW_UNIMPLEMENTED;
 446 }
 447
 448 CpuL07::CpuL07(CpuL07Model *model, const char* name, xbt_dict_t props,
 449                      double power_initial, double power_scale, tmgr_trace_t power_trace,
 450                            int core, e_surf_resource_state_t state_initial, tmgr_trace_t state_trace)
 451  : Cpu(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, power_initial * power_scale),
 452            core, power_initial, power_scale, state_initial)
 453 {
 454   xbt_assert(m_powerScale > 0, "Power has to be >0");
 455
 456   if (power_trace)
 457     p_powerEvent = tmgr_history_add_trace(history, power_trace, 0.0, 0, this);
 458   else
 459     p_powerEvent = NULL;
 460
 461   if (state_trace)
 462         p_stateEvent = tmgr_history_add_trace(history, state_trace, 0.0, 0, this);
 463 }
 464
 465 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props,
 466                          double bw_initial,
 467                          tmgr_trace_t bw_trace,
 468                          double lat_initial,
 469                          tmgr_trace_t lat_trace,
 470                          e_surf_resource_state_t state_initial,
 471                          tmgr_trace_t state_trace,
 472                          e_surf_link_sharing_policy_t policy)
 473  : Link(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, bw_initial), history, state_trace)
 474 {
 475   m_bwCurrent = bw_initial;
 476   if (bw_trace)
 477     p_bwEvent = tmgr_history_add_trace(history, bw_trace, 0.0, 0, this);
 478
 479   setState(state_initial);
 480   m_latCurrent = lat_initial;
 481
 482   if (lat_trace)
 483         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 484
 485   if (policy == SURF_LINK_FATPIPE)
 486         lmm_constraint_shared(getConstraint());
 487 }
 488
 489 Action *CpuL07::execute(double size)
 490 {
 491   sg_host_t*host_list = xbt_new0(sg_host_t, 1);
 492   double *flops_amount = xbt_new0(double, 1);
 493   double *bytes_amount = xbt_new0(double, 1);
 494
 495   host_list[0] = sg_host_by_name(getName());
 496   flops_amount[0] = size;
 497
 498   return static_cast<HostL07Model*>(getModel())->executeParallelTask(1, host_list,
 499                                               flops_amount,
 500                                      bytes_amount, -1);
 501 }
 502
 503 Action *CpuL07::sleep(double duration)
 504 {
 505   L07Action *action = NULL;
 506
 507   XBT_IN("(%s,%g)", getName(), duration);
 508
 509   action = static_cast<L07Action*>(execute(1.0));
 510   action->m_maxDuration = duration;
 511   action->m_suspended = 2;
 512   lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 513
 514   XBT_OUT();
 515   return action;
 516 }
 517
 518 bool CpuL07::isUsed(){
 519   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 520 }
 521
 522 bool LinkL07::isUsed(){
 523   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 524 }
 525
 526 void CpuL07::updateState(tmgr_trace_event_t event_type, double value, double /*date*/){
 527   XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
 528   if (event_type == p_powerEvent) {
 529           m_powerScale = value;
 530     lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_powerPeak * m_powerScale);
 531     if (tmgr_trace_event_free(event_type))
 532       p_powerEvent = NULL;
 533   } else if (event_type == p_stateEvent) {
 534     if (value > 0)
 535       setState(SURF_RESOURCE_ON);
 536     else
 537       setState(SURF_RESOURCE_OFF);
 538     if (tmgr_trace_event_free(event_type))
 539       p_stateEvent = NULL;
 540   } else {
 541     XBT_CRITICAL("Unknown event ! \n");
 542     xbt_abort();
 543   }
 544   return;
 545 }
 546
 547 void LinkL07::updateState(tmgr_trace_event_t event_type, double value, double date) {
 548   XBT_DEBUG("Updating link %s (%p) with value=%f for date=%g", getName(), this, value, date);
 549   if (event_type == p_bwEvent) {
 550     updateBandwidth(value, date);
 551     if (tmgr_trace_event_free(event_type))
 552       p_bwEvent = NULL;
 553   } else if (event_type == p_latEvent) {
 554     updateLatency(value, date);
 555     if (tmgr_trace_event_free(event_type))
 556       p_latEvent = NULL;
 557   } else if (event_type == p_stateEvent) {
 558     if (value > 0)
 559       setState(SURF_RESOURCE_ON);
 560     else
 561       setState(SURF_RESOURCE_OFF);
 562     if (tmgr_trace_event_free(event_type))
 563       p_stateEvent = NULL;
 564   } else {
 565     XBT_CRITICAL("Unknown event ! \n");
 566     xbt_abort();
 567   }
 568   return;
 569 }
 570
 571 e_surf_resource_state_t HostL07::getState() {
 572   return p_cpu->getState();
 573 }
 574
 575
 576 double LinkL07::getBandwidth()
 577 {
 578   return m_bwCurrent;
 579 }
 580
 581 void LinkL07::updateBandwidth(double value, double date)
 582 {
 583   m_bwCurrent = value;
 584   lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_bwCurrent);
 585 }
 586
 587 double LinkL07::getLatency()
 588 {
 589   return m_latCurrent;
 590 }
 591
 592 void LinkL07::updateLatency(double value, double date)
 593 {
 594   lmm_variable_t var = NULL;
 595   L07Action *action;
 596   lmm_element_t elem = NULL;
 597
 598   m_latCurrent = value;
 599   while ((var = lmm_get_var_from_cnst(ptask_maxmin_system, getConstraint(), &elem))) {
 600     action = static_cast<L07Action*>(lmm_variable_id(var));
 601     action->updateBound();
 602   }
 603 }
 604
 605
 606 bool LinkL07::isShared()
 607 {
 608   return lmm_constraint_is_shared(getConstraint());
 609 }
 610
 611 /**********
 612  * Action *
 613  **********/
 614
 615 L07Action::~L07Action(){
 616   free(p_communicationAmount);
 617   free(p_computationAmount);
 618 }
 619
 620 void L07Action::updateBound()
 621 {
 622   double lat_current = 0.0;
 623   double lat_bound = -1.0;
 624   int i, j;
 625
 626   int hostNb = p_edgeList->size();
 627
 628   for (i = 0; i < hostNb; i++) {
 629     for (j = 0; j < hostNb; j++) {
 630       xbt_dynar_t route=NULL;
 631
 632       if (p_communicationAmount[i * hostNb + j] > 0) {
 633         double lat = 0.0;
 634         routing_platf->getRouteAndLatency((*p_edgeList)[i], (*p_edgeList)[j],
 635                                                           &route, &lat);
 636
 637         lat_current = MAX(lat_current, lat * p_communicationAmount[i * hostNb + j]);
 638       }
 639     }
 640   }
 641   lat_bound = sg_tcp_gamma / (2.0 * lat_current);
 642   XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
 643   if ((m_latency == 0.0) && (m_suspended == 0)) {
 644     if (m_rate < 0)
 645       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), lat_bound);
 646     else
 647       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), min(m_rate, lat_bound));
 648   }
 649 }
 650
 651 int L07Action::unref()
 652 {
 653   m_refcount--;
 654   if (!m_refcount) {
 655     if (action_hook.is_linked())
 656           p_stateSet->erase(p_stateSet->iterator_to(*this));
 657     if (getVariable())
 658       lmm_variable_free(ptask_maxmin_system, getVariable());
 659     delete this;
 660     return 1;
 661   }
 662   return 0;
 663 }
 664
 665 void L07Action::cancel()
 666 {
 667   setState(SURF_ACTION_FAILED);
 668   return;
 669 }
 670
 671 void L07Action::suspend()
 672 {
 673   XBT_IN("(%p))", this);
 674   if (m_suspended != 2) {
 675     m_suspended = 1;
 676     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 0.0);
 677   }
 678   XBT_OUT();
 679 }
 680
 681 void L07Action::resume()
 682 {
 683   XBT_IN("(%p)", this);
 684   if (m_suspended != 2) {
 685     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 1.0);
 686     m_suspended = 0;
 687   }
 688   XBT_OUT();
 689 }
 690
 691 bool L07Action::isSuspended()
 692 {
 693   return m_suspended == 1;
 694 }
 695
 696 void L07Action::setMaxDuration(double duration)
 697 {                               /* FIXME: should inherit */
 698   XBT_IN("(%p,%g)", this, duration);
 699   m_maxDuration = duration;
 700   XBT_OUT();
 701 }
 702
 703 void L07Action::setPriority(double priority)
 704 {                               /* FIXME: should inherit */
 705   XBT_IN("(%p,%g)", this, priority);
 706   m_priority = priority;
 707   XBT_OUT();
 708 }
 709
 710 double L07Action::getRemains()
 711 {
 712   XBT_IN("(%p)", this);
 713   XBT_OUT();
 714   return m_remains;
 715 }