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 <cstdlib>
   8
   9 #include <algorithm>
  10
  11 #include "host_ptask_L07.hpp"
  12
  13 #include "cpu_interface.hpp"
  14 #include "surf_routing.hpp"
  15 #include "xbt/lib.h"
  16 #include "src/surf/platform.hpp"
  17
  18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_host);
  19 XBT_LOG_EXTERNAL_CATEGORY(xbt_cfg);
  20
  21 /**************************************/
  22 /*** Resource Creation & Destruction **/
  23 /**************************************/
  24
  25 static void ptask_netlink_parse_init(sg_platf_link_cbarg_t link)
  26 {
  27   netlink_parse_init(link);
  28   current_property_set = NULL;
  29 }
  30
  31 void surf_host_model_init_ptask_L07(void)
  32 {
  33   XBT_CINFO(xbt_cfg,"Switching to the L07 model to handle parallel tasks.");
  34   xbt_assert(!surf_cpu_model_pm, "CPU model type already defined");
  35   xbt_assert(!surf_network_model, "network model type already defined");
  36
  37   // Define the callbacks to parse the XML
  38   simgrid::surf::on_link.connect(ptask_netlink_parse_init);
  39   simgrid::surf::on_postparse.connect([](){
  40       surf_host_model->addTraces();
  41   });
  42
  43   surf_host_model = new simgrid::surf::HostL07Model();
  44   xbt_dynar_push(all_existing_models, &surf_host_model);
  45 }
  46
  47
  48 namespace simgrid {
  49 namespace surf {
  50
  51 HostL07Model::HostL07Model() : HostModel() {
  52   p_maxminSystem = lmm_system_new(1);
  53   surf_network_model = new NetworkL07Model(this,p_maxminSystem);
  54   surf_cpu_model_pm = new CpuL07Model(this,p_maxminSystem);
  55
  56   routing_model_create(surf_network_model->createLink("__loopback__",
  57                                                           498000000, NULL,
  58                                                           0.000015, NULL,
  59                                                           1/*ON*/, NULL,
  60                                                           SURF_LINK_FATPIPE, NULL));
  61 }
  62
  63 HostL07Model::~HostL07Model() {
  64   delete surf_cpu_model_pm;
  65   delete surf_network_model;
  66 }
  67
  68 CpuL07Model::CpuL07Model(HostL07Model *hmodel,lmm_system_t sys)
  69         : CpuModel()
  70         , p_hostModel(hmodel)
  71         {
  72           p_maxminSystem = sys;
  73         }
  74 CpuL07Model::~CpuL07Model() {
  75         surf_cpu_model_pm = NULL;
  76         lmm_system_free(p_maxminSystem);
  77         p_maxminSystem = NULL;
  78 }
  79 NetworkL07Model::NetworkL07Model(HostL07Model *hmodel, lmm_system_t sys)
  80         : NetworkModel()
  81         , p_hostModel(hmodel)
  82         {
  83           p_maxminSystem = sys;
  84         }
  85 NetworkL07Model::~NetworkL07Model()
  86 {
  87         surf_network_model = NULL;
  88         p_maxminSystem = NULL; // Avoid multi-free
  89 }
  90
  91
  92 double HostL07Model::shareResources(double /*now*/)
  93 {
  94   L07Action *action;
  95
  96   ActionList *running_actions = getRunningActionSet();
  97   double min = this->shareResourcesMaxMin(running_actions,
  98                                               p_maxminSystem,
  99                                               bottleneck_solve);
 100
 101   for(ActionList::iterator it(running_actions->begin()), itend(running_actions->end())
 102          ; it != itend ; ++it) {
 103         action = static_cast<L07Action*>(&*it);
 104     if (action->m_latency > 0) {
 105       if (min < 0) {
 106         min = action->m_latency;
 107         XBT_DEBUG("Updating min (value) with %p (start %f): %f", action,
 108                action->getStartTime(), min);
 109       } else if (action->m_latency < min) {
 110         min = action->m_latency;
 111         XBT_DEBUG("Updating min (latency) with %p (start %f): %f", action,
 112                action->getStartTime(), min);
 113       }
 114     }
 115   }
 116
 117   XBT_DEBUG("min value : %f", min);
 118
 119   return min;
 120 }
 121
 122 void HostL07Model::updateActionsState(double /*now*/, double delta) {
 123
 124   L07Action *action;
 125   ActionList *actionSet = getRunningActionSet();
 126
 127   for(ActionList::iterator it = actionSet->begin(), itNext = it
 128          ; it != actionSet->end()
 129          ; it =  itNext) {
 130         ++itNext;
 131     action = static_cast<L07Action*>(&*it);
 132     if (action->m_latency > 0) {
 133       if (action->m_latency > delta) {
 134         double_update(&(action->m_latency), delta, sg_surf_precision);
 135       } else {
 136         action->m_latency = 0.0;
 137       }
 138       if ((action->m_latency == 0.0) && (action->isSuspended() == 0)) {
 139         action->updateBound();
 140         lmm_update_variable_weight(p_maxminSystem, action->getVariable(), 1.0);
 141       }
 142     }
 143     XBT_DEBUG("Action (%p) : remains (%g) updated by %g.",
 144            action, action->getRemains(), lmm_variable_getvalue(action->getVariable()) * delta);
 145     action->updateRemains(lmm_variable_getvalue(action->getVariable()) * delta);
 146
 147     if (action->getMaxDuration() != NO_MAX_DURATION)
 148       action->updateMaxDuration(delta);
 149
 150     XBT_DEBUG("Action (%p) : remains (%g).", action, action->getRemains());
 151
 152     /* In the next if cascade, the action can be finished either because:
 153      *  - The amount of remaining work reached 0
 154      *  - The max duration was reached
 155      * If it's not done, it may have failed.
 156      */
 157
 158     if ((action->getRemains() <= 0) &&
 159         (lmm_get_variable_weight(action->getVariable()) > 0)) {
 160       action->finish();
 161       action->setState(SURF_ACTION_DONE);
 162     } else if ((action->getMaxDuration() != NO_MAX_DURATION) &&
 163                (action->getMaxDuration() <= 0)) {
 164       action->finish();
 165       action->setState(SURF_ACTION_DONE);
 166     } else {
 167       /* Need to check that none of the model has failed */
 168       lmm_constraint_t cnst = NULL;
 169       int i = 0;
 170
 171       while ((cnst = lmm_get_cnst_from_var(p_maxminSystem, action->getVariable(), i++))) {
 172         void *constraint_id = lmm_constraint_id(cnst);
 173
 174         if (static_cast<Host*>(constraint_id)->isOff()) {
 175           XBT_DEBUG("Action (%p) Failed!!", action);
 176           action->finish();
 177           action->setState(SURF_ACTION_FAILED);
 178           break;
 179         }
 180       }
 181     }
 182   }
 183   return;
 184 }
 185
 186 Action *HostL07Model::executeParallelTask(int host_nb, sg_host_t *host_list,
 187                   double *flops_amount, double *bytes_amount,
 188                   double rate) {
 189         return new L07Action(this, host_nb, host_list, flops_amount, bytes_amount, rate);
 190 }
 191
 192
 193 L07Action::L07Action(Model *model, int host_nb,
 194                 sg_host_t*host_list,
 195                 double *flops_amount,
 196                 double *bytes_amount,
 197                 double rate)
 198         : CpuAction(model, 1, 0)
 199 {
 200   unsigned int cpt;
 201   int nb_link = 0;
 202   int nb_used_host = 0; /* Only the hosts with something to compute (>0 flops) are counted) */
 203   double latency = 0.0;
 204
 205
 206   this->p_netcardList->reserve(host_nb);
 207   for (int i = 0; i<host_nb; i++)
 208           this->p_netcardList->push_back(host_list[i]->pimpl_netcard);
 209
 210   /* Compute the number of affected resources... */
 211   if(bytes_amount != NULL) {
 212     xbt_dict_t ptask_parallel_task_link_set = xbt_dict_new_homogeneous(NULL);
 213
 214     for (int i = 0; i < host_nb; i++) {
 215       for (int j = 0; j < host_nb; j++) {
 216         xbt_dynar_t route=NULL;
 217
 218         if (bytes_amount[i * host_nb + j] > 0) {
 219           double lat=0.0;
 220           unsigned int cpt;
 221           void *_link;
 222           LinkL07 *link;
 223
 224           routing_platf->getRouteAndLatency((*this->p_netcardList)[i], (*this->p_netcardList)[j],
 225                                                         &route, &lat);
 226           latency = MAX(latency, lat);
 227
 228           xbt_dynar_foreach(route, cpt, _link) {
 229             link = static_cast<LinkL07*>(_link);
 230             xbt_dict_set(ptask_parallel_task_link_set, link->getName(), link, NULL);
 231           }
 232         }
 233       }
 234     }
 235
 236     nb_link = xbt_dict_length(ptask_parallel_task_link_set);
 237     xbt_dict_free(&ptask_parallel_task_link_set);
 238   }
 239
 240   for (int i = 0; i < host_nb; i++)
 241     if (flops_amount[i] > 0)
 242       nb_used_host++;
 243
 244   XBT_DEBUG("Creating a parallel task (%p) with %d hosts and %d unique links.", this, host_nb, nb_link);
 245   this->p_computationAmount = flops_amount;
 246   this->p_communicationAmount = bytes_amount;
 247   this->m_latency = latency;
 248   this->m_rate = rate;
 249
 250   this->p_variable = lmm_variable_new(model->getMaxminSystem(), this, 1.0,
 251       (rate > 0 ? rate : -1.0),
 252       host_nb + nb_link);
 253
 254   if (this->m_latency > 0)
 255     lmm_update_variable_weight(model->getMaxminSystem(), this->getVariable(), 0.0);
 256
 257   for (int i = 0; i < host_nb; i++)
 258     lmm_expand(model->getMaxminSystem(), host_list[i]->pimpl_cpu->getConstraint(),
 259         this->getVariable(), flops_amount[i]);
 260
 261   if(bytes_amount != NULL) {
 262     for (int i = 0; i < host_nb; i++) {
 263       for (int j = 0; j < host_nb; j++) {
 264         void *_link;
 265
 266         xbt_dynar_t route=NULL;
 267         if (bytes_amount[i * host_nb + j] == 0.0)
 268           continue;
 269
 270         routing_platf->getRouteAndLatency((*this->p_netcardList)[i], (*this->p_netcardList)[j],
 271                                                     &route, NULL);
 272
 273         xbt_dynar_foreach(route, cpt, _link) {
 274           LinkL07 *link = static_cast<LinkL07*>(_link);
 275           lmm_expand_add(model->getMaxminSystem(), link->getConstraint(),
 276                         this->getVariable(), bytes_amount[i * host_nb + j]);
 277         }
 278       }
 279     }
 280   }
 281
 282   if (nb_link + nb_used_host == 0) {
 283     this->setCost(1.0);
 284     this->setRemains(0.0);
 285   }
 286   xbt_free(host_list);
 287 }
 288
 289 Action *NetworkL07Model::communicate(NetCard *src, NetCard *dst,
 290                                        double size, double rate)
 291 {
 292   sg_host_t*host_list = xbt_new0(sg_host_t, 2);
 293   double *flops_amount = xbt_new0(double, 2);
 294   double *bytes_amount = xbt_new0(double, 4);
 295   Action *res = NULL;
 296
 297   host_list[0] = sg_host_by_name(src->getName());
 298   host_list[1] = sg_host_by_name(dst->getName());
 299   bytes_amount[1] = size;
 300
 301   res = p_hostModel->executeParallelTask(2, host_list, flops_amount, bytes_amount, rate);
 302
 303   return res;
 304 }
 305
 306 Cpu *CpuL07Model::createCpu(simgrid::s4u::Host *host,  xbt_dynar_t powerPeakList,
 307                           int pstate, double power_scale,
 308                           tmgr_trace_t power_trace, int core,
 309                           int initiallyOn,
 310                           tmgr_trace_t state_trace)
 311 {
 312   CpuL07 *cpu = new CpuL07(this, host, powerPeakList, pstate, power_scale, power_trace,
 313                          core, initiallyOn, state_trace);
 314   return cpu;
 315 }
 316
 317 Link* NetworkL07Model::createLink(const char *name,
 318                                  double bw_initial,
 319                                  tmgr_trace_t bw_trace,
 320                                  double lat_initial,
 321                                  tmgr_trace_t lat_trace,
 322                                  int initiallyOn,
 323                                  tmgr_trace_t state_trace,
 324                                  e_surf_link_sharing_policy_t policy,
 325                                  xbt_dict_t properties)
 326 {
 327   xbt_assert(!Link::byName(name),
 328                  "Link '%s' declared several times in the platform file.", name);
 329
 330   Link* link = new LinkL07(this, name, properties,
 331                              bw_initial, bw_trace,
 332                                          lat_initial, lat_trace,
 333                                          initiallyOn, state_trace,
 334                                          policy);
 335   Link::onCreation(link);
 336   return link;
 337 }
 338
 339 void HostL07Model::addTraces()
 340 {
 341   xbt_dict_cursor_t cursor = NULL;
 342   char *trace_name, *elm;
 343
 344   if (!trace_connect_list_host_speed)
 345     return;
 346
 347   /* Connect traces relative to cpu */
 348   xbt_dict_foreach(trace_connect_list_host_speed, cursor, trace_name, elm) {
 349     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 350     Cpu *cpu = sg_host_by_name(elm)->pimpl_cpu;
 351
 352     xbt_assert(cpu, "Host %s undefined", elm);
 353     xbt_assert(trace, "Trace %s undefined", trace_name);
 354
 355     cpu->set_speed_trace(trace);
 356   }
 357
 358   /* Connect traces relative to network */
 359   xbt_dict_foreach(trace_connect_list_link_avail, cursor, trace_name, elm) {
 360     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 361     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 362
 363     xbt_assert(link, "Link %s undefined", elm);
 364     xbt_assert(trace, "Trace %s undefined", trace_name);
 365
 366     link->p_stateEvent = future_evt_set->add_trace(trace, 0.0, link);
 367   }
 368
 369   xbt_dict_foreach(trace_connect_list_link_bw, cursor, trace_name, elm) {
 370     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 371     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 372
 373     xbt_assert(link, "Link %s undefined", elm);
 374     xbt_assert(trace, "Trace %s undefined", trace_name);
 375
 376     link->p_bwEvent = future_evt_set->add_trace(trace, 0.0, link);
 377   }
 378
 379   xbt_dict_foreach(trace_connect_list_link_lat, cursor, trace_name, elm) {
 380     tmgr_trace_t trace = (tmgr_trace_t) xbt_dict_get_or_null(traces_set_list, trace_name);
 381     LinkL07 *link = static_cast<LinkL07*>(Link::byName(elm));
 382
 383     xbt_assert(link, "Link %s undefined", elm);
 384     xbt_assert(trace, "Trace %s undefined", trace_name);
 385
 386     link->p_latEvent = future_evt_set->add_trace(trace, 0.0, link);
 387   }
 388 }
 389
 390 /************
 391  * Resource *
 392  ************/
 393
 394 CpuL07::CpuL07(CpuL07Model *model, simgrid::s4u::Host *host,
 395                      xbt_dynar_t speedPeakList, int pstate,
 396                                  double speedScale, tmgr_trace_t speedTrace,
 397                          int core, int initiallyOn, tmgr_trace_t state_trace)
 398  : Cpu(model, host, speedPeakList, pstate,
 399            core, xbt_dynar_get_as(speedPeakList,pstate,double), speedScale, initiallyOn)
 400 {
 401   p_constraint = lmm_constraint_new(model->getMaxminSystem(), this, xbt_dynar_get_as(speedPeakList,pstate,double) * speedScale);
 402
 403   if (speedTrace)
 404     p_speedEvent = future_evt_set->add_trace(speedTrace, 0.0, this);
 405
 406   if (state_trace)
 407     p_stateEvent = future_evt_set->add_trace(state_trace, 0.0, this);
 408 }
 409
 410 CpuL07::~CpuL07()
 411 {
 412 }
 413
 414 LinkL07::LinkL07(NetworkL07Model *model, const char* name, xbt_dict_t props,
 415                          double bw_initial,
 416                          tmgr_trace_t bw_trace,
 417                          double lat_initial,
 418                          tmgr_trace_t lat_trace,
 419                          int initiallyOn,
 420                          tmgr_trace_t state_trace,
 421                          e_surf_link_sharing_policy_t policy)
 422  : Link(model, name, props, lmm_constraint_new(model->getMaxminSystem(), this, bw_initial), future_evt_set, state_trace)
 423 {
 424   m_bwCurrent = bw_initial;
 425   if (bw_trace)
 426     p_bwEvent = future_evt_set->add_trace(bw_trace, 0.0, this);
 427
 428   if (initiallyOn)
 429     turnOn();
 430   else
 431     turnOff();
 432   m_latCurrent = lat_initial;
 433
 434   if (lat_trace)
 435     p_latEvent = future_evt_set->add_trace(lat_trace, 0.0, this);
 436
 437   if (policy == SURF_LINK_FATPIPE)
 438         lmm_constraint_shared(getConstraint());
 439 }
 440
 441 Action *CpuL07::execution_start(double size)
 442 {
 443   sg_host_t*host_list = xbt_new0(sg_host_t, 1);
 444   double *flops_amount = xbt_new0(double, 1);
 445
 446   host_list[0] = getHost();
 447   flops_amount[0] = size;
 448
 449   return static_cast<CpuL07Model*>(getModel())->p_hostModel
 450     ->executeParallelTask( 1, host_list, flops_amount, NULL, -1);
 451 }
 452
 453 Action *CpuL07::sleep(double duration)
 454 {
 455   L07Action *action = static_cast<L07Action*>(execution_start(1.0));
 456   action->m_maxDuration = duration;
 457   action->m_suspended = 2;
 458   lmm_update_variable_weight(getModel()->getMaxminSystem(), action->getVariable(), 0.0);
 459
 460   return action;
 461 }
 462
 463 bool CpuL07::isUsed(){
 464   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 465 }
 466
 467 /** @brief take into account changes of speed (either load or max) */
 468 void CpuL07::onSpeedChange() {
 469         lmm_variable_t var = NULL;
 470         lmm_element_t elem = NULL;
 471
 472     lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), m_speedPeak * m_speedScale);
 473     while ((var = lmm_get_var_from_cnst
 474             (getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 475       Action *action = static_cast<Action*>(lmm_variable_id(var));
 476
 477       lmm_update_variable_bound(getModel()->getMaxminSystem(),
 478                                 action->getVariable(),
 479                                 m_speedScale * m_speedPeak);
 480     }
 481
 482         Cpu::onSpeedChange();
 483 }
 484
 485
 486 bool LinkL07::isUsed(){
 487   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 488 }
 489
 490 void CpuL07::updateState(tmgr_trace_iterator_t triggered, double value, double /*date*/){
 491   XBT_DEBUG("Updating cpu %s (%p) with value %g", getName(), this, value);
 492   if (triggered == p_speedEvent) {
 493     m_speedScale = value;
 494     onSpeedChange();
 495     tmgr_trace_event_unref(&p_speedEvent);
 496   } else if (triggered == p_stateEvent) {
 497     if (value > 0)
 498       turnOn();
 499     else
 500       turnOff();
 501     tmgr_trace_event_unref(&p_stateEvent);
 502   } else {
 503     xbt_die("Unknown event!\n");
 504   }
 505 }
 506
 507 void LinkL07::updateState(tmgr_trace_iterator_t triggered, double value, double date) {
 508   XBT_DEBUG("Updating link %s (%p) with value=%f for date=%g", getName(), this, value, date);
 509   if (triggered == p_bwEvent) {
 510     updateBandwidth(value, date);
 511     tmgr_trace_event_unref(&p_bwEvent);
 512   } else if (triggered == p_latEvent) {
 513     updateLatency(value, date);
 514     tmgr_trace_event_unref(&p_latEvent);
 515   } else if (triggered == p_stateEvent) {
 516     if (value > 0)
 517       turnOn();
 518     else
 519       turnOff();
 520     tmgr_trace_event_unref(&p_stateEvent);
 521   } else {
 522     xbt_die("Unknown event ! \n");
 523   }
 524 }
 525
 526 double LinkL07::getBandwidth()
 527 {
 528   return m_bwCurrent;
 529 }
 530
 531 void LinkL07::updateBandwidth(double value, double date)
 532 {
 533   m_bwCurrent = value;
 534   lmm_update_constraint_bound(getModel()->getMaxminSystem(), getConstraint(), m_bwCurrent);
 535 }
 536
 537 void LinkL07::updateLatency(double value, double date)
 538 {
 539   lmm_variable_t var = NULL;
 540   L07Action *action;
 541   lmm_element_t elem = NULL;
 542
 543   m_latCurrent = value;
 544   while ((var = lmm_get_var_from_cnst(getModel()->getMaxminSystem(), getConstraint(), &elem))) {
 545     action = static_cast<L07Action*>(lmm_variable_id(var));
 546     action->updateBound();
 547   }
 548 }
 549
 550 /**********
 551  * Action *
 552  **********/
 553
 554 L07Action::~L07Action(){
 555   free(p_communicationAmount);
 556   free(p_computationAmount);
 557 }
 558
 559 void L07Action::updateBound()
 560 {
 561   double lat_current = 0.0;
 562   double lat_bound = -1.0;
 563   int i, j;
 564
 565   int hostNb = p_netcardList->size();
 566
 567   if (p_communicationAmount != NULL) {
 568     for (i = 0; i < hostNb; i++) {
 569       for (j = 0; j < hostNb; j++) {
 570         xbt_dynar_t route=NULL;
 571
 572         if (p_communicationAmount[i * hostNb + j] > 0) {
 573           double lat = 0.0;
 574           routing_platf->getRouteAndLatency((*p_netcardList)[i], (*p_netcardList)[j],
 575                                                                 &route, &lat);
 576
 577           lat_current = MAX(lat_current, lat * p_communicationAmount[i * hostNb + j]);
 578         }
 579       }
 580     }
 581   }
 582   lat_bound = sg_tcp_gamma / (2.0 * lat_current);
 583   XBT_DEBUG("action (%p) : lat_bound = %g", this, lat_bound);
 584   if ((m_latency == 0.0) && (m_suspended == 0)) {
 585     if (m_rate < 0)
 586       lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(), lat_bound);
 587     else
 588       lmm_update_variable_bound(getModel()->getMaxminSystem(), getVariable(),
 589         std::min(m_rate, lat_bound));
 590   }
 591 }
 592
 593 int L07Action::unref()
 594 {
 595   m_refcount--;
 596   if (!m_refcount) {
 597     if (action_hook.is_linked())
 598       p_stateSet->erase(p_stateSet->iterator_to(*this));
 599     if (getVariable())
 600       lmm_variable_free(getModel()->getMaxminSystem(), getVariable());
 601     delete this;
 602     return 1;
 603   }
 604   return 0;
 605 }
 606
 607 }
 608 }