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_host_add_cb(cpu_parse_init);
  38   sg_platf_host_add_cb(host_parse_init);
  39   sg_platf_link_add_cb(ptask_netlink_parse_init);
  40   sg_platf_postparse_add_cb(host_add_traces);
  41
  42   surf_host_model = new HostL07Model();
  43   Model *model = surf_host_model;
  44   xbt_dynar_push(all_existing_models, &model);
  45 }
  46
  47
  48 HostL07Model::HostL07Model() : HostModel() {
  49   if (!ptask_maxmin_system)
  50         ptask_maxmin_system = lmm_system_new(1);
  51   surf_host_model = NULL;
  52   surf_network_model = new NetworkL07Model(this);
  53   surf_cpu_model_pm = new CpuL07Model(this);
  54
  55   routing_model_create(surf_network_model->createLink("__loopback__",
  56                                                           498000000, NULL,
  57                                                           0.000015, NULL,
  58                                                           SURF_RESOURCE_ON, NULL,
  59                                                           SURF_LINK_FATPIPE, NULL));
  60 }
  61
  62 HostL07Model::~HostL07Model() {
  63   xbt_dict_free(&ptask_parallel_task_link_set);
  64
  65   delete surf_cpu_model_pm;
  66   delete surf_network_model;
  67   ptask_host_count = 0;
  68
  69   if (ptask_maxmin_system) {
  70     lmm_system_free(ptask_maxmin_system);
  71     ptask_maxmin_system = NULL;
  72   }
  73 }
  74
  75 double HostL07Model::shareResources(double /*now*/)
  76 {
  77   L07Action *action;
  78
  79   ActionList *running_actions = getRunningActionSet();
  80   double min = this->shareResourcesMaxMin(running_actions,
  81                                               ptask_maxmin_system,
  82                                               bottleneck_solve);
  83
  84   for(ActionList::iterator it(running_actions->begin()), itend(running_actions->end())
  85          ; it != itend ; ++it) {
  86         action = static_cast<L07Action*>(&*it);
  87     if (action->m_latency > 0) {
  88       if (min < 0) {
  89         min = action->m_latency;
  90         XBT_DEBUG("Updating min (value) with %p (start %f): %f", action,
  91                action->getStartTime(), min);
  92       } else if (action->m_latency < min) {
  93         min = action->m_latency;
  94         XBT_DEBUG("Updating min (latency) with %p (start %f): %f", action,
  95                action->getStartTime(), min);
  96       }
  97     }
  98   }
  99
 100   XBT_DEBUG("min value : %f", min);
 101
 102   return min;
 103 }
 104
 105 void HostL07Model::updateActionsState(double /*now*/, double delta) {
 106
 107   L07Action *action;
 108   ActionList *actionSet = getRunningActionSet();
 109
 110   for(ActionList::iterator it = actionSet->begin(), itNext = it
 111          ; it != actionSet->end()
 112          ; it =  itNext) {
 113         ++itNext;
 114     action = static_cast<L07Action*>(&*it);
 115     if (action->m_latency > 0) {
 116       if (action->m_latency > delta) {
 117         double_update(&(action->m_latency), delta, sg_surf_precision);
 118       } else {
 119         action->m_latency = 0.0;
 120       }
 121       if ((action->m_latency == 0.0) && (action->isSuspended() == 0)) {
 122         action->updateBound();
 123         lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 1.0);
 124       }
 125     }
 126     XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
 127            action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
 128     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 129
 130     if (action->getMaxDuration() != NO_MAX_DURATION)
 131       action->updateMaxDuration(delta);
 132
 133     XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
 134
 135     /* In the next if cascade, the action can be finished either because:
 136      *  - The amount of remaining work reached 0
 137      *  - The max duration was reached
 138      * If it's not done, it may have failed.
 139      */
 140
 141     if ((action->getRemains() <= 0) &&
 142         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 143       action->finish();
 144       action->setState(SURF_ACTION_DONE);
 145     } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
 146                (action->getMaxDuration() <= 0)) {
 147       action->finish();
 148       action->setState(SURF_ACTION_DONE);
 149     } else {
 150       /* Need to check that none of the model has failed */
 151       lmm_constraint_t cnst = NULL;
 152       int i = 0;
 153
 154       while ((cnst = lmm_get_cnst_from_var(ptask_maxmin_system, action->getVariable(), i++))) {
 155         void *constraint_id = lmm_constraint_id(cnst);
 156
 157         if (static_cast<Host*>(constraint_id)->getState() == SURF_RESOURCE_OFF) {
 158           XBT_DEBUG("Action (%p) Failed!!", action);
 159           action->finish();
 160           action->setState(SURF_ACTION_FAILED);
 161           break;
 162         }
 163       }
 164     }
 165   }
 166   return;
 167 }
 168
 169 Action *HostL07Model::executeParallelTask(int host_nb,
 170                                           sg_host_t*host_list,
 171                                                                                   double *flops_amount,
 172                                                                                   double *bytes_amount,
 173                                                                                   double rate)
 174 {
 175   L07Action *action = new L07Action(this, 1, 0);
 176   unsigned int cpt;
 177   int nb_link = 0;
 178   int nb_host = 0;
 179   double latency = 0.0;
 180
 181   action->p_edgeList->reserve(host_nb);
 182   for (int i = 0; i<host_nb; i++)
 183           action->p_edgeList->push_back(sg_host_edge(host_list[i]));
 184
 185   if (ptask_parallel_task_link_set == NULL)
 186     ptask_parallel_task_link_set = xbt_dict_new_homogeneous(NULL);
 187
 188   xbt_dict_reset(ptask_parallel_task_link_set);
 189
 190   /* Compute the number of affected resources... */
 191   for (int i = 0; i < host_nb; i++) {
 192     for (int j = 0; j < host_nb; j++) {
 193       xbt_dynar_t route=NULL;
 194
 195       if (bytes_amount[i * host_nb + j] > 0) {
 196         double lat=0.0;
 197         unsigned int cpt;
 198         void *_link;
 199         LinkL07 *link;
 200
 201         routing_platf->getRouteAndLatency((*action->p_edgeList)[i], (*action->p_edgeList)[j],
 202                                                   &route, &lat);
 203         latency = MAX(latency, lat);
 204
 205         xbt_dynar_foreach(route, cpt, _link) {
 206            link = static_cast<LinkL07*>(_link);
 207            xbt_dict_set(ptask_parallel_task_link_set, link->getName(), link, NULL);
 208         }
 209       }
 210     }
 211   }
 212
 213   nb_link = xbt_dict_length(ptask_parallel_task_link_set);
 214   xbt_dict_reset(ptask_parallel_task_link_set);
 215
 216   for (int i = 0; i < host_nb; i++)
 217     if (flops_amount[i] > 0)
 218       nb_host++;
 219
 220   XBT_DEBUG("Creating a parallel task (%p) with %d cpus and %d links.",
 221          action, host_nb, nb_link);
 222   action->m_suspended = 0; /* valgrind seems to want it despite the calloc... */
 223   action->p_computationAmount = flops_amount;
 224   action->p_communicationAmount = bytes_amount;
 225   action->m_latency = latency;
 226   action->m_rate = rate;
 227
 228   action->p_variable = lmm_variable_new(ptask_maxmin_system, action, 1.0,
 229                                         (rate > 0 ? rate : -1.0),
 230                                                                                 host_nb + nb_link);
 231
 232   if (action->m_latency > 0)
 233     lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 234
 235   for (int i = 0; i < host_nb; i++)
 236     lmm_expand(ptask_maxmin_system,
 237                sg_host_surfcpu(host_list[i])->getConstraint(),
 238                action->getVariable(), flops_amount[i]);
 239
 240   for (int i = 0; i < host_nb; i++) {
 241     for (int j = 0; j < host_nb; j++) {
 242       void *_link;
 243
 244       xbt_dynar_t route=NULL;
 245       if (bytes_amount[i * host_nb + j] == 0.0)
 246         continue;
 247
 248       routing_platf->getRouteAndLatency((*action->p_edgeList)[i], (*action->p_edgeList)[j],
 249                                             &route, NULL);
 250
 251       xbt_dynar_foreach(route, cpt, _link) {
 252         LinkL07 *link = static_cast<LinkL07*>(_link);
 253         lmm_expand_add(ptask_maxmin_system, link->getConstraint(),
 254                        action->getVariable(),
 255                        bytes_amount[i * host_nb + j]);
 256       }
 257     }
 258   }
 259
 260   if (nb_link + nb_host == 0) {
 261     action->setCost(1.0);
 262     action->setRemains(0.0);
 263   }
 264
 265   return action;
 266 }
 267
 268 Host *HostL07Model::createHost(const char *name)
 269 {
 270   HostL07 *wk = NULL;
 271   sg_host_t sg_host = sg_host_by_name(name);
 272
 273   xbt_assert(!surf_host_resource_priv(sg_host),
 274               "Host '%s' declared several times in the platform file.",
 275               name);
 276
 277   wk = new HostL07(this, name, NULL,
 278                                   sg_host_edge(sg_host),
 279                                                   sg_host_surfcpu(sg_host));
 280   surf_callback_emit(hostCreatedCallbacks, wk);
 281   xbt_lib_set(host_lib, name, SURF_HOST_LEVEL, wk);
 282
 283   return wk;
 284 }
 285
 286 Action *NetworkL07Model::communicate(RoutingEdge *src, RoutingEdge *dst,
 287                                        double size, double rate)
 288 {
 289   sg_host_t*host_list = xbt_new0(sg_host_t, 2);
 290   double *flops_amount = xbt_new0(double, 2);
 291   double *bytes_amount = xbt_new0(double, 4);
 292   Action *res = NULL;
 293
 294   host_list[0] = sg_host_by_name(src->getName());
 295   host_list[1] = sg_host_by_name(dst->getName());
 296   bytes_amount[1] = size;
 297
 298   res = p_hostModel->executeParallelTask(2, host_list,
 299                                     flops_amount,
 300                                     bytes_amount, rate);
 301
 302   return res;
 303 }
 304
 305 xbt_dynar_t HostL07Model::getRoute(Host *src, Host *dst)
 306 {
 307   xbt_dynar_t route=NULL;
 308   routing_platf->getRouteAndLatency(src->p_netElm, dst->p_netElm, &route, NULL);
 309   return route;
 310 }
 311
 312 Cpu *CpuL07Model::createCpu(const char *name,  xbt_dynar_t powerPeak,
 313                           int pstate, double power_scale,
 314                           tmgr_trace_t power_trace, int core,
 315                           e_surf_resource_state_t state_initial,
 316                           tmgr_trace_t state_trace,
 317                           xbt_dict_t cpu_properties)
 318 {
 319   double power_initial = xbt_dynar_get_as(powerPeak, pstate, double);
 320   xbt_dynar_free(&powerPeak);   // kill memory leak
 321   sg_host_t sg_host = sg_host_by_name(name);
 322
 323   xbt_assert(!surf_host_resource_priv(sg_host),
 324               "Host '%s' declared several times in the platform file.",
 325               name);
 326
 327   CpuL07 *cpu = new CpuL07(this, name, cpu_properties,
 328                                      power_initial, power_scale, power_trace,
 329                          core, state_initial, state_trace);
 330   sg_host_surfcpu_register(sg_host, cpu);
 331   return cpu;
 332 }
 333
 334 Link* NetworkL07Model::createLink(const char *name,
 335                                  double bw_initial,
 336                                  tmgr_trace_t bw_trace,
 337                                  double lat_initial,
 338                                  tmgr_trace_t lat_trace,
 339                                  e_surf_resource_state_t state_initial,
 340                                  tmgr_trace_t state_trace,
 341                                  e_surf_link_sharing_policy_t policy,
 342                                  xbt_dict_t properties)
 343 {
 344   xbt_assert(!Link::byName(name),
 345                  "Link '%s' declared several times in the platform file.", name);
 346
 347   Link* link = new LinkL07(this, name, properties,
 348                              bw_initial, bw_trace,
 349                                          lat_initial, lat_trace,
 350                                          state_initial, state_trace,
 351                                          policy);
 352   surf_callback_emit(networkLinkCreatedCallbacks, link);
 353   return link;
 354 }
 355
 356 void HostL07Model::addTraces()
 357 {
 358   xbt_dict_cursor_t cursor = NULL;
 359   char *trace_name, *elm;
 360
 361   if (!trace_connect_list_host_avail)
 362     return;
 363
 364   /* Connect traces relative to cpu */
 365   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 366     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 367     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 368
 369     xbt_assert(host, "Host %s undefined", elm);
 370     xbt_assert(trace, "Trace %s undefined", trace_name);
 371
 372     host->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 373   }
 374
 375   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 376     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 377     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 378
 379     xbt_assert(host, "Host %s undefined", elm);
 380     xbt_assert(trace, "Trace %s undefined", trace_name);
 381
 382     host->p_powerEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 383   }
 384
 385   /* Connect traces relative to network */
 386   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 387     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 388     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 389
 390     xbt_assert(link, "Link %s undefined", elm);
 391     xbt_assert(trace, "Trace %s undefined", trace_name);
 392
 393     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 394   }
 395
 396   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 397     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 398     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 399
 400     xbt_assert(link, "Link %s undefined", elm);
 401     xbt_assert(trace, "Trace %s undefined", trace_name);
 402
 403     link->p_bwEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 404   }
 405
 406   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 407     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 408     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 409
 410     xbt_assert(link, "Link %s undefined", elm);
 411     xbt_assert(trace, "Trace %s undefined", trace_name);
 412
 413     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 414   }
 415 }
 416
 417 /************
 418  * Resource *
 419  ************/
 420
 421 HostL07::HostL07(HostModel *model, const char* name, xbt_dict_t props, RoutingEdge *netElm, Cpu *cpu)
 422   : Host(model, name, props, NULL, netElm, cpu)
 423 {
 424 }
 425
 426 double HostL07::getPowerPeakAt(int /*pstate_index*/)
 427 {
 428         THROW_UNIMPLEMENTED;
 429 }
 430
 431 int HostL07::getNbPstates()
 432 {
 433         THROW_UNIMPLEMENTED;
 434 }
 435
 436 void HostL07::setPstate(int /*pstate_index*/)
 437 {
 438         THROW_UNIMPLEMENTED;
 439 }
 440
 441 int HostL07::getPstate()
 442 {
 443         THROW_UNIMPLEMENTED;
 444 }
 445
 446 double HostL07::getConsumedEnergy()
 447 {
 448         THROW_UNIMPLEMENTED;
 449 }
 450
 451 CpuL07::CpuL07(CpuL07Model *model, const char* name, xbt_dict_t props,
 452                      double power_initial, double power_scale, tmgr_trace_t power_trace,
 453                            int core, e_surf_resource_state_t state_initial, tmgr_trace_t state_trace)
 454  : Cpu(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, power_initial * power_scale),
 455            core, power_initial, power_scale, state_initial)
 456 {
 457   xbt_assert(m_powerScale > 0, "Power has to be >0");
 458
 459   if (power_trace)
 460     p_powerEvent = tmgr_history_add_trace(history, power_trace, 0.0, 0, this);
 461   else
 462     p_powerEvent = NULL;
 463
 464   if (state_trace)
 465         p_stateEvent = tmgr_history_add_trace(history, state_trace, 0.0, 0, this);
 466 }
 467
 468 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props,
 469                          double bw_initial,
 470                          tmgr_trace_t bw_trace,
 471                          double lat_initial,
 472                          tmgr_trace_t lat_trace,
 473                          e_surf_resource_state_t state_initial,
 474                          tmgr_trace_t state_trace,
 475                          e_surf_link_sharing_policy_t policy)
 476  : Link(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, bw_initial), history, state_trace)
 477 {
 478   m_bwCurrent = bw_initial;
 479   if (bw_trace)
 480     p_bwEvent = tmgr_history_add_trace(history, bw_trace, 0.0, 0, this);
 481
 482   setState(state_initial);
 483   m_latCurrent = lat_initial;
 484
 485   if (lat_trace)
 486         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 487
 488   if (policy == SURF_LINK_FATPIPE)
 489         lmm_constraint_shared(getConstraint());
 490 }
 491
 492 bool CpuL07::isUsed(){
 493   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 494 }
 495
 496 bool LinkL07::isUsed(){
 497   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 498 }
 499
 500 void CpuL07::updateState(tmgr_trace_event_t event_type, double value, double /*date*/){
 501   XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
 502   if (event_type == p_powerEvent) {
 503           m_powerScale = value;
 504     lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_powerPeak * m_powerScale);
 505     if (tmgr_trace_event_free(event_type))
 506       p_powerEvent = NULL;
 507   } else if (event_type == p_stateEvent) {
 508     if (value > 0)
 509       setState(SURF_RESOURCE_ON);
 510     else
 511       setState(SURF_RESOURCE_OFF);
 512     if (tmgr_trace_event_free(event_type))
 513       p_stateEvent = NULL;
 514   } else {
 515     XBT_CRITICAL("Unknown event ! \n");
 516     xbt_abort();
 517   }
 518   return;
 519 }
 520
 521 void LinkL07::updateState(tmgr_trace_event_t event_type, double value, double date) {
 522   XBT_DEBUG("Updating link %s (%p) with value=%f for date=%g", getName(), this, value, date);
 523   if (event_type == p_bwEvent) {
 524     updateBandwidth(value, date);
 525     if (tmgr_trace_event_free(event_type))
 526       p_bwEvent = NULL;
 527   } else if (event_type == p_latEvent) {
 528     updateLatency(value, date);
 529     if (tmgr_trace_event_free(event_type))
 530       p_latEvent = NULL;
 531   } else if (event_type == p_stateEvent) {
 532     if (value > 0)
 533       setState(SURF_RESOURCE_ON);
 534     else
 535       setState(SURF_RESOURCE_OFF);
 536     if (tmgr_trace_event_free(event_type))
 537       p_stateEvent = NULL;
 538   } else {
 539     XBT_CRITICAL("Unknown event ! \n");
 540     xbt_abort();
 541   }
 542   return;
 543 }
 544
 545 e_surf_resource_state_t HostL07::getState() {
 546   return p_cpu->getState();
 547 }
 548
 549 Action *HostL07::execute(double size)
 550 {
 551   sg_host_t*host_list = xbt_new0(sg_host_t, 1);
 552   double *flops_amount = xbt_new0(double, 1);
 553   double *bytes_amount = xbt_new0(double, 1);
 554
 555   host_list[0] = sg_host_by_name(getName());
 556   flops_amount[0] = size;
 557
 558   return static_cast<HostL07Model*>(getModel())->executeParallelTask(1, host_list,
 559                                               flops_amount,
 560                                      bytes_amount, -1);
 561 }
 562
 563 Action *HostL07::sleep(double duration)
 564 {
 565   L07Action *action = NULL;
 566
 567   XBT_IN("(%s,%g)", getName(), duration);
 568
 569   action = static_cast<L07Action*>(execute(1.0));
 570   action->m_maxDuration = duration;
 571   action->m_suspended = 2;
 572   lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 573
 574   XBT_OUT();
 575   return action;
 576 }
 577
 578 double LinkL07::getBandwidth()
 579 {
 580   return m_bwCurrent;
 581 }
 582
 583 void LinkL07::updateBandwidth(double value, double date)
 584 {
 585   m_bwCurrent = value;
 586   lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_bwCurrent);
 587 }
 588
 589 double LinkL07::getLatency()
 590 {
 591   return m_latCurrent;
 592 }
 593
 594 void LinkL07::updateLatency(double value, double date)
 595 {
 596   lmm_variable_t var = NULL;
 597   L07Action *action;
 598   lmm_element_t elem = NULL;
 599
 600   m_latCurrent = value;
 601   while ((var = lmm_get_var_from_cnst(ptask_maxmin_system, getConstraint(), &elem))) {
 602     action = static_cast<L07Action*>(lmm_variable_id(var));
 603     action->updateBound();
 604   }
 605 }
 606
 607
 608 bool LinkL07::isShared()
 609 {
 610   return lmm_constraint_is_shared(getConstraint());
 611 }
 612
 613 /**********
 614  * Action *
 615  **********/
 616
 617 L07Action::~L07Action(){
 618   free(p_communicationAmount);
 619   free(p_computationAmount);
 620 }
 621
 622 void L07Action::updateBound()
 623 {
 624   double lat_current = 0.0;
 625   double lat_bound = -1.0;
 626   int i, j;
 627
 628   int hostNb = p_edgeList->size();
 629
 630   for (i = 0; i < hostNb; i++) {
 631     for (j = 0; j < hostNb; j++) {
 632       xbt_dynar_t route=NULL;
 633
 634       if (p_communicationAmount[i * hostNb + j] > 0) {
 635         double lat = 0.0;
 636         routing_platf->getRouteAndLatency((*p_edgeList)[i], (*p_edgeList)[j],
 637                                                           &route, &lat);
 638
 639         lat_current = MAX(lat_current, lat * p_communicationAmount[i * hostNb + j]);
 640       }
 641     }
 642   }
 643   lat_bound = sg_tcp_gamma / (2.0 * lat_current);
 644   XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
 645   if ((m_latency == 0.0) && (m_suspended == 0)) {
 646     if (m_rate < 0)
 647       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), lat_bound);
 648     else
 649       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), min(m_rate, lat_bound));
 650   }
 651 }
 652
 653 int L07Action::unref()
 654 {
 655   m_refcount--;
 656   if (!m_refcount) {
 657     if (action_hook.is_linked())
 658           p_stateSet->erase(p_stateSet->iterator_to(*this));
 659     if (getVariable())
 660       lmm_variable_free(ptask_maxmin_system, getVariable());
 661     delete this;
 662     return 1;
 663   }
 664   return 0;
 665 }
 666
 667 void L07Action::cancel()
 668 {
 669   setState(SURF_ACTION_FAILED);
 670   return;
 671 }
 672
 673 void L07Action::suspend()
 674 {
 675   XBT_IN("(%p))", this);
 676   if (m_suspended != 2) {
 677     m_suspended = 1;
 678     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 0.0);
 679   }
 680   XBT_OUT();
 681 }
 682
 683 void L07Action::resume()
 684 {
 685   XBT_IN("(%p)", this);
 686   if (m_suspended != 2) {
 687     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 1.0);
 688     m_suspended = 0;
 689   }
 690   XBT_OUT();
 691 }
 692
 693 bool L07Action::isSuspended()
 694 {
 695   return m_suspended == 1;
 696 }
 697
 698 void L07Action::setMaxDuration(double duration)
 699 {                               /* FIXME: should inherit */
 700   XBT_IN("(%p,%g)", this, duration);
 701   m_maxDuration = duration;
 702   XBT_OUT();
 703 }
 704
 705 void L07Action::setPriority(double priority)
 706 {                               /* FIXME: should inherit */
 707   XBT_IN("(%p,%g)", this, priority);
 708   m_priority = priority;
 709   XBT_OUT();
 710 }
 711
 712 double L07Action::getRemains()
 713 {
 714   XBT_IN("(%p)", this);
 715   XBT_OUT();
 716   return m_remains;
 717 }