src/surf/host_ptask_L07.cpp

   1 /* Copyright (c) 2007-2010, 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 "host_ptask_L07.hpp"
   8
   9 #include "cpu_interface.hpp"
  10 #include "surf_routing.hpp"
  11
  12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
  13
  14 static int ptask_host_count = 0;
  15 static xbt_dict_t ptask_parallel_task_link_set = NULL;
  16 lmm_system_t ptask_maxmin_system = NULL;
  17
  18
  19 /**************************************/
  20 /*** Resource Creation & Destruction **/
  21 /**************************************/
  22
  23 static void ptask_netlink_parse_init(sg_platf_link_cbarg_t link)
  24 {
  25   netlink_parse_init(link);
  26   current_property_set = NULL;
  27 }
  28
  29 void surf_host_model_init_ptask_L07(void)
  30 {
  31   XBT_INFO("Switching to the L07 model to handle parallel tasks.");
  32   xbt_assert(!surf_cpu_model_pm, "CPU model type already defined");
  33   xbt_assert(!surf_network_model, "network model type already defined");
  34
  35   // Define the callbacks to parse the XML
  36   sg_platf_host_add_cb(cpu_parse_init);
  37   sg_platf_host_add_cb(host_parse_init);
  38   sg_platf_link_add_cb(ptask_netlink_parse_init);
  39   sg_platf_postparse_add_cb(host_add_traces);
  40
  41   surf_host_model = new HostL07Model();
  42   Model *model = surf_host_model;
  43   xbt_dynar_push(model_list, &model);
  44   xbt_dynar_push(model_list_invoke, &model);
  45 }
  46
  47
  48 HostL07Model::HostL07Model() : HostModel("Host ptask_L07") {
  49   if (!ptask_maxmin_system)
  50         ptask_maxmin_system = lmm_system_new(1);
  51   surf_host_model = NULL;
  52   surf_network_model = new NetworkL07Model();
  53   surf_cpu_model_pm = new CpuL07Model();
  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   p_cpuModel = surf_cpu_model_pm;
  61 }
  62
  63 HostL07Model::~HostL07Model() {
  64   xbt_dict_free(&ptask_parallel_task_link_set);
  65
  66   delete surf_cpu_model_pm;
  67   delete surf_network_model;
  68   ptask_host_count = 0;
  69
  70   if (ptask_maxmin_system) {
  71     lmm_system_free(ptask_maxmin_system);
  72     ptask_maxmin_system = NULL;
  73   }
  74 }
  75
  76 double HostL07Model::shareResources(double /*now*/)
  77 {
  78   L07Action *action;
  79
  80   ActionList *running_actions = getRunningActionSet();
  81   double min = this->shareResourcesMaxMin(running_actions,
  82                                               ptask_maxmin_system,
  83                                               bottleneck_solve);
  84
  85   for(ActionList::iterator it(running_actions->begin()), itend(running_actions->end())
  86          ; it != itend ; ++it) {
  87         action = static_cast<L07Action*>(&*it);
  88     if (action->m_latency > 0) {
  89       if (min < 0) {
  90         min = action->m_latency;
  91         XBT_DEBUG("Updating min (value) with %p (start %f): %f", action,
  92                action->getStartTime(), min);
  93       } else if (action->m_latency < min) {
  94         min = action->m_latency;
  95         XBT_DEBUG("Updating min (latency) with %p (start %f): %f", action,
  96                action->getStartTime(), min);
  97       }
  98     }
  99   }
 100
 101   XBT_DEBUG("min value : %f", min);
 102
 103   return min;
 104 }
 105
 106 void HostL07Model::updateActionsState(double /*now*/, double delta) {
 107
 108   L07Action *action;
 109   ActionList *actionSet = getRunningActionSet();
 110
 111   for(ActionList::iterator it = actionSet->begin(), itNext = it
 112          ; it != actionSet->end()
 113          ; it =  itNext) {
 114         ++itNext;
 115     action = static_cast<L07Action*>(&*it);
 116     if (action->m_latency > 0) {
 117       if (action->m_latency > delta) {
 118         double_update(&(action->m_latency), delta, sg_surf_precision);
 119       } else {
 120         action->m_latency = 0.0;
 121       }
 122       if ((action->m_latency == 0.0) && (action->isSuspended() == 0)) {
 123         action->updateBound();
 124         lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 1.0);
 125       }
 126     }
 127     XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
 128            action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
 129     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 130
 131     if (action->getMaxDuration() != NO_MAX_DURATION)
 132       action->updateMaxDuration(delta);
 133
 134     XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
 135
 136     /* In the next if cascade, the action can be finished either because:
 137      *  - The amount of remaining work reached 0
 138      *  - The max duration was reached
 139      * If it's not done, it may have failed.
 140      */
 141
 142     if ((action->getRemains() <= 0) &&
 143         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 144       action->finish();
 145       action->setState(SURF_ACTION_DONE);
 146     } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
 147                (action->getMaxDuration() <= 0)) {
 148       action->finish();
 149       action->setState(SURF_ACTION_DONE);
 150     } else {
 151       /* Need to check that none of the model has failed */
 152       lmm_constraint_t cnst = NULL;
 153       int i = 0;
 154
 155       while ((cnst = lmm_get_cnst_from_var(ptask_maxmin_system, action->getVariable(), i++))) {
 156         void *constraint_id = lmm_constraint_id(cnst);
 157
 158         if (static_cast<Host*>(constraint_id)->getState() == SURF_RESOURCE_OFF) {
 159           XBT_DEBUG("Action (%p) Failed!!", action);
 160           action->finish();
 161           action->setState(SURF_ACTION_FAILED);
 162           break;
 163         }
 164       }
 165     }
 166   }
 167   return;
 168 }
 169
 170 Action *HostL07Model::executeParallelTask(int host_nb,
 171                                           void **host_list,
 172                                                                                   double *flops_amount,
 173                                                                                   double *bytes_amount,
 174                                                                                   double rate)
 175 {
 176   L07Action *action;
 177   int i, j;
 178   unsigned int cpt;
 179   int nb_link = 0;
 180   int nb_host = 0;
 181   double latency = 0.0;
 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 (i = 0; i < host_nb; i++) {
 190     for (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(static_cast<HostL07*>(host_list[i])->p_netElm,
 200                                                   static_cast<HostL07*>(host_list[j])->p_netElm,
 201                                                   &route,
 202                                                   &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 (i = 0; i < host_nb; i++)
 217     if (flops_amount[i] > 0)
 218       nb_host++;
 219
 220   action = new L07Action(this, 1, 0);
 221   XBT_DEBUG("Creating a parallel task (%p) with %d cpus and %d links.",
 222          action, host_nb, nb_link);
 223   action->m_suspended = 0;        /* Should be useless because of the
 224                                    calloc but it seems to help valgrind... */
 225   action->m_hostNb = host_nb;
 226   action->p_hostList = (Host **) host_list;
 227   action->p_computationAmount = flops_amount;
 228   action->p_communicationAmount = bytes_amount;
 229   action->m_latency = latency;
 230   action->m_rate = rate;
 231
 232   action->p_variable = lmm_variable_new(ptask_maxmin_system, action, 1.0,
 233                        (action->m_rate > 0) ? action->m_rate : -1.0,
 234                        host_nb + nb_link);
 235
 236   if (action->m_latency > 0)
 237     lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 238
 239   for (i = 0; i < host_nb; i++)
 240     lmm_expand(ptask_maxmin_system,
 241                  static_cast<HostL07*>(host_list[i])->p_cpu->getConstraint(),
 242                action->getVariable(), flops_amount[i]);
 243
 244   for (i = 0; i < host_nb; i++) {
 245     for (j = 0; j < host_nb; j++) {
 246       void *_link;
 247       LinkL07 *link;
 248
 249       xbt_dynar_t route=NULL;
 250       if (bytes_amount[i * host_nb + j] == 0.0)
 251         continue;
 252
 253       routing_platf->getRouteAndLatency(static_cast<HostL07*>(host_list[i])->p_netElm,
 254                                         static_cast<HostL07*>(host_list[j])->p_netElm,
 255                                             &route, NULL);
 256
 257       xbt_dynar_foreach(route, cpt, _link) {
 258         link = static_cast<LinkL07*>(_link);
 259         lmm_expand_add(ptask_maxmin_system, link->getConstraint(),
 260                        action->getVariable(),
 261                        bytes_amount[i * host_nb + j]);
 262       }
 263     }
 264   }
 265
 266   if (nb_link + nb_host == 0) {
 267     action->setCost(1.0);
 268     action->setRemains(0.0);
 269   }
 270
 271   return action;
 272 }
 273
 274 Host *HostL07Model::createHost(const char *name)
 275 {
 276   HostL07 *wk = NULL;
 277   sg_host_t sg_host = sg_host_by_name(name);
 278
 279   xbt_assert(!surf_host_resource_priv(sg_host),
 280               "Host '%s' declared several times in the platform file.",
 281               name);
 282
 283   wk = new HostL07(this, name, NULL,
 284                                   sg_host_edge(sg_host),
 285                                                   sg_host_surfcpu(sg_host));
 286
 287   xbt_lib_set(host_lib, name, SURF_HOST_LEVEL, wk);
 288
 289   return wk;
 290 }
 291
 292 Action *HostL07Model::communicate(Host *src, Host *dst,
 293                                        double size, double rate)
 294 {
 295   void **host_list = xbt_new0(void *, 2);
 296   double *flops_amount = xbt_new0(double, 2);
 297   double *bytes_amount = xbt_new0(double, 4);
 298   Action *res = NULL;
 299
 300   host_list[0] = src;
 301   host_list[1] = dst;
 302   bytes_amount[1] = size;
 303
 304   res = executeParallelTask(2, host_list,
 305                                     flops_amount,
 306                                     bytes_amount, rate);
 307
 308   return res;
 309 }
 310
 311 xbt_dynar_t HostL07Model::getRoute(Host *src, Host *dst)
 312 {
 313   xbt_dynar_t route=NULL;
 314   routing_platf->getRouteAndLatency(src->p_netElm, dst->p_netElm, &route, NULL);
 315   return route;
 316 }
 317
 318 Cpu *CpuL07Model::createCpu(const char *name,  xbt_dynar_t powerPeak,
 319                           int pstate, double power_scale,
 320                           tmgr_trace_t power_trace, int core,
 321                           e_surf_resource_state_t state_initial,
 322                           tmgr_trace_t state_trace,
 323                           xbt_dict_t cpu_properties)
 324 {
 325   double power_initial = xbt_dynar_get_as(powerPeak, pstate, double);
 326   xbt_dynar_free(&powerPeak);   // kill memory leak
 327   sg_host_t sg_host = sg_host_by_name(name);
 328
 329   xbt_assert(!surf_host_resource_priv(sg_host),
 330               "Host '%s' declared several times in the platform file.",
 331               name);
 332
 333   CpuL07 *cpu = new CpuL07(this, name, cpu_properties,
 334                                      power_initial, power_scale, power_trace,
 335                          core, state_initial, state_trace);
 336
 337   sg_host_surfcpu_set(sg_host, cpu);
 338
 339   return cpu;
 340 }
 341
 342 Link* NetworkL07Model::createLink(const char *name,
 343                                  double bw_initial,
 344                                  tmgr_trace_t bw_trace,
 345                                  double lat_initial,
 346                                  tmgr_trace_t lat_trace,
 347                                  e_surf_resource_state_t state_initial,
 348                                  tmgr_trace_t state_trace,
 349                                  e_surf_link_sharing_policy_t policy,
 350                                  xbt_dict_t properties)
 351 {
 352   xbt_assert(!Link::byName(name),
 353                  "Link '%s' declared several times in the platform file.", name);
 354
 355   return new LinkL07(this, name, properties,
 356                              bw_initial, bw_trace,
 357                                          lat_initial, lat_trace,
 358                                          state_initial, state_trace,
 359                                          policy);
 360 }
 361
 362 void HostL07Model::addTraces()
 363 {
 364   xbt_dict_cursor_t cursor = NULL;
 365   char *trace_name, *elm;
 366
 367   if (!trace_connect_list_host_avail)
 368     return;
 369
 370   /* Connect traces relative to cpu */
 371   xbt_dict_foreach(trace_connect_list_host_avail, cursor, trace_name, elm) {
 372     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 373     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 374
 375     xbt_assert(host, "Host %s undefined", elm);
 376     xbt_assert(trace, "Trace %s undefined", trace_name);
 377
 378     host->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 379   }
 380
 381   xbt_dict_foreach(trace_connect_list_power, cursor, trace_name, elm) {
 382     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 383     CpuL07 *host = static_cast<CpuL07*>(sg_host_surfcpu(sg_host_by_name(elm)));
 384
 385     xbt_assert(host, "Host %s undefined", elm);
 386     xbt_assert(trace, "Trace %s undefined", trace_name);
 387
 388     host->p_powerEvent = tmgr_history_add_trace(history, trace, 0.0, 0, host);
 389   }
 390
 391   /* Connect traces relative to network */
 392   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 393     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 394     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 395
 396     xbt_assert(link, "Link %s undefined", elm);
 397     xbt_assert(trace, "Trace %s undefined", trace_name);
 398
 399     link->p_stateEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 400   }
 401
 402   xbt_dict_foreach(trace_connect_list_bandwidth, cursor, trace_name, elm) {
 403     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 404     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 405
 406     xbt_assert(link, "Link %s undefined", elm);
 407     xbt_assert(trace, "Trace %s undefined", trace_name);
 408
 409     link->p_bwEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 410   }
 411
 412   xbt_dict_foreach(trace_connect_list_latency, cursor, trace_name, elm) {
 413     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 414     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 415
 416     xbt_assert(link, "Link %s undefined", elm);
 417     xbt_assert(trace, "Trace %s undefined", trace_name);
 418
 419     link->p_latEvent = tmgr_history_add_trace(history, trace, 0.0, 0, link);
 420   }
 421 }
 422
 423 /************
 424  * Resource *
 425  ************/
 426
 427 HostL07::HostL07(HostModel *model, const char* name, xbt_dict_t props, RoutingEdge *netElm, Cpu *cpu)
 428   : Host(model, name, props, NULL, netElm, cpu)
 429 {
 430 }
 431
 432 double HostL07::getPowerPeakAt(int /*pstate_index*/)
 433 {
 434         THROW_UNIMPLEMENTED;
 435 }
 436
 437 int HostL07::getNbPstates()
 438 {
 439         THROW_UNIMPLEMENTED;
 440 }
 441
 442 void HostL07::setPstate(int /*pstate_index*/)
 443 {
 444         THROW_UNIMPLEMENTED;
 445 }
 446
 447 int HostL07::getPstate()
 448 {
 449         THROW_UNIMPLEMENTED;
 450 }
 451
 452 double HostL07::getConsumedEnergy()
 453 {
 454         THROW_UNIMPLEMENTED;
 455 }
 456
 457 CpuL07::CpuL07(CpuL07Model *model, const char* name, xbt_dict_t props,
 458                      double power_initial, double power_scale, tmgr_trace_t power_trace,
 459                            int core, e_surf_resource_state_t state_initial, tmgr_trace_t state_trace)
 460  : Cpu(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, power_initial * power_scale),
 461            core, power_initial, power_scale)
 462 {
 463   xbt_assert(m_powerScale > 0, "Power has to be >0");
 464
 465   if (power_trace)
 466     p_powerEvent = tmgr_history_add_trace(history, power_trace, 0.0, 0, this);
 467   else
 468     p_powerEvent = NULL;
 469
 470   setState(state_initial);
 471   if (state_trace)
 472         p_stateEvent = tmgr_history_add_trace(history, state_trace, 0.0, 0, this);
 473 }
 474
 475 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props,
 476                          double bw_initial,
 477                          tmgr_trace_t bw_trace,
 478                          double lat_initial,
 479                          tmgr_trace_t lat_trace,
 480                          e_surf_resource_state_t state_initial,
 481                          tmgr_trace_t state_trace,
 482                          e_surf_link_sharing_policy_t policy)
 483  : Link(model, name, props, lmm_constraint_new(ptask_maxmin_system, this, bw_initial), history, state_trace)
 484 {
 485   m_bwCurrent = bw_initial;
 486   if (bw_trace)
 487     p_bwEvent = tmgr_history_add_trace(history, bw_trace, 0.0, 0, this);
 488
 489   setState(state_initial);
 490   m_latCurrent = lat_initial;
 491
 492   if (lat_trace)
 493         p_latEvent = tmgr_history_add_trace(history, lat_trace, 0.0, 0, this);
 494
 495   if (policy == SURF_LINK_FATPIPE)
 496         lmm_constraint_shared(getConstraint());
 497 }
 498
 499 bool CpuL07::isUsed(){
 500   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 501 }
 502
 503 bool LinkL07::isUsed(){
 504   return lmm_constraint_used(ptask_maxmin_system, getConstraint());
 505 }
 506
 507 void CpuL07::updateState(tmgr_trace_event_t event_type, double value, double /*date*/){
 508   XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
 509   if (event_type == p_powerEvent) {
 510           m_powerScale = value;
 511     lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_powerPeak * m_powerScale);
 512     if (tmgr_trace_event_free(event_type))
 513       p_powerEvent = NULL;
 514   } else if (event_type == p_stateEvent) {
 515     if (value > 0)
 516       setState(SURF_RESOURCE_ON);
 517     else
 518       setState(SURF_RESOURCE_OFF);
 519     if (tmgr_trace_event_free(event_type))
 520       p_stateEvent = NULL;
 521   } else {
 522     XBT_CRITICAL("Unknown event ! \n");
 523     xbt_abort();
 524   }
 525   return;
 526 }
 527
 528 void LinkL07::updateState(tmgr_trace_event_t event_type, double value, double date) {
 529   XBT_DEBUG("Updating link %s (%p) with value=%f for date=%g", getName(), this, value, date);
 530   if (event_type == p_bwEvent) {
 531     updateBandwidth(value, date);
 532     if (tmgr_trace_event_free(event_type))
 533       p_bwEvent = NULL;
 534   } else if (event_type == p_latEvent) {
 535     updateLatency(value, date);
 536     if (tmgr_trace_event_free(event_type))
 537       p_latEvent = NULL;
 538   } else if (event_type == p_stateEvent) {
 539     if (value > 0)
 540       setState(SURF_RESOURCE_ON);
 541     else
 542       setState(SURF_RESOURCE_OFF);
 543     if (tmgr_trace_event_free(event_type))
 544       p_stateEvent = NULL;
 545   } else {
 546     XBT_CRITICAL("Unknown event ! \n");
 547     xbt_abort();
 548   }
 549   return;
 550 }
 551
 552 e_surf_resource_state_t HostL07::getState() {
 553   return p_cpu->getState();
 554 }
 555
 556 Action *HostL07::execute(double size)
 557 {
 558   void **host_list = xbt_new0(void *, 1);
 559   double *flops_amount = xbt_new0(double, 1);
 560   double *bytes_amount = xbt_new0(double, 1);
 561
 562   host_list[0] = this;
 563   bytes_amount[0] = 0.0;
 564   flops_amount[0] = size;
 565
 566   return static_cast<HostL07Model*>(getModel())->executeParallelTask(1, host_list,
 567                                               flops_amount,
 568                                      bytes_amount, -1);
 569 }
 570
 571 Action *HostL07::sleep(double duration)
 572 {
 573   L07Action *action = NULL;
 574
 575   XBT_IN("(%s,%g)", getName(), duration);
 576
 577   action = static_cast<L07Action*>(execute(1.0));
 578   action->m_maxDuration = duration;
 579   action->m_suspended = 2;
 580   lmm_update_variable_weight(ptask_maxmin_system, action->getVariable(), 0.0);
 581
 582   XBT_OUT();
 583   return action;
 584 }
 585
 586 double LinkL07::getBandwidth()
 587 {
 588   return m_bwCurrent;
 589 }
 590
 591 void LinkL07::updateBandwidth(double value, double date)
 592 {
 593   m_bwCurrent = value;
 594   lmm_update_constraint_bound(ptask_maxmin_system, getConstraint(), m_bwCurrent);
 595 }
 596
 597 double LinkL07::getLatency()
 598 {
 599   return m_latCurrent;
 600 }
 601
 602 void LinkL07::updateLatency(double value, double date)
 603 {
 604   lmm_variable_t var = NULL;
 605   L07Action *action;
 606   lmm_element_t elem = NULL;
 607
 608   m_latCurrent = value;
 609   while ((var = lmm_get_var_from_cnst(ptask_maxmin_system, getConstraint(), &elem))) {
 610     action = static_cast<L07Action*>(lmm_variable_id(var));
 611     action->updateBound();
 612   }
 613 }
 614
 615
 616 bool LinkL07::isShared()
 617 {
 618   return lmm_constraint_is_shared(getConstraint());
 619 }
 620
 621 /**********
 622  * Action *
 623  **********/
 624
 625 L07Action::~L07Action(){
 626   free(p_hostList);
 627   free(p_communicationAmount);
 628   free(p_computationAmount);
 629 }
 630
 631 void L07Action::updateBound()
 632 {
 633   double lat_current = 0.0;
 634   double lat_bound = -1.0;
 635   int i, j;
 636
 637   for (i = 0; i < m_hostNb; i++) {
 638     for (j = 0; j < m_hostNb; j++) {
 639       xbt_dynar_t route=NULL;
 640
 641       if (p_communicationAmount[i * m_hostNb + j] > 0) {
 642         double lat = 0.0;
 643         routing_platf->getRouteAndLatency(static_cast<HostL07*>(((void**)p_hostList)[i])->p_netElm,
 644                                           static_cast<HostL07*>(((void**)p_hostList)[j])->p_netElm,
 645                                                           &route, &lat);
 646
 647         lat_current = MAX(lat_current, lat * p_communicationAmount[i * m_hostNb + j]);
 648       }
 649     }
 650   }
 651   lat_bound = sg_tcp_gamma / (2.0 * lat_current);
 652   XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
 653   if ((m_latency == 0.0) && (m_suspended == 0)) {
 654     if (m_rate < 0)
 655       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), lat_bound);
 656     else
 657       lmm_update_variable_bound(ptask_maxmin_system, getVariable(), min(m_rate, lat_bound));
 658   }
 659 }
 660
 661 int L07Action::unref()
 662 {
 663   m_refcount--;
 664   if (!m_refcount) {
 665     if (actionHook::is_linked())
 666           p_stateSet->erase(p_stateSet->iterator_to(*this));
 667     if (getVariable())
 668       lmm_variable_free(ptask_maxmin_system, getVariable());
 669     delete this;
 670     return 1;
 671   }
 672   return 0;
 673 }
 674
 675 void L07Action::cancel()
 676 {
 677   setState(SURF_ACTION_FAILED);
 678   return;
 679 }
 680
 681 void L07Action::suspend()
 682 {
 683   XBT_IN("(%p))", this);
 684   if (m_suspended != 2) {
 685     m_suspended = 1;
 686     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 0.0);
 687   }
 688   XBT_OUT();
 689 }
 690
 691 void L07Action::resume()
 692 {
 693   XBT_IN("(%p)", this);
 694   if (m_suspended != 2) {
 695     lmm_update_variable_weight(ptask_maxmin_system, getVariable(), 1.0);
 696     m_suspended = 0;
 697   }
 698   XBT_OUT();
 699 }
 700
 701 bool L07Action::isSuspended()
 702 {
 703   return m_suspended == 1;
 704 }
 705
 706 void L07Action::setMaxDuration(double duration)
 707 {                               /* FIXME: should inherit */
 708   XBT_IN("(%p,%g)", this, duration);
 709   m_maxDuration = duration;
 710   XBT_OUT();
 711 }
 712
 713 void L07Action::setPriority(double priority)
 714 {                               /* FIXME: should inherit */
 715   XBT_IN("(%p,%g)", this, priority);
 716   m_priority = priority;
 717   XBT_OUT();
 718 }
 719
 720 double L07Action::getRemains()
 721 {
 722   XBT_IN("(%p)", this);
 723   XBT_OUT();
 724   return m_remains;
 725 }