src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2018. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "simgrid/s4u/Engine.hpp"
   7 #include "simgrid/s4u/Storage.hpp"
   8
   9 #include "src/kernel/EngineImpl.hpp"
  10 #include "src/simix/smx_private.hpp"
  11
  12 #include "src/include/simgrid/sg_config.h"
  13
  14 #include "src/surf/HostImpl.hpp"
  15 #include "src/surf/cpu_interface.hpp"
  16 #include "src/surf/network_interface.hpp"
  17
  18 #include "src/kernel/routing/ClusterZone.hpp"
  19 #include "src/kernel/routing/DijkstraZone.hpp"
  20 #include "src/kernel/routing/DragonflyZone.hpp"
  21 #include "src/kernel/routing/EmptyZone.hpp"
  22 #include "src/kernel/routing/FatTreeZone.hpp"
  23 #include "src/kernel/routing/FloydZone.hpp"
  24 #include "src/kernel/routing/FullZone.hpp"
  25 #include "src/kernel/routing/NetPoint.hpp"
  26 #include "src/kernel/routing/NetZoneImpl.hpp"
  27 #include "src/kernel/routing/TorusZone.hpp"
  28 #include "src/kernel/routing/VivaldiZone.hpp"
  29 #include <string>
  30 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  31
  32 XBT_PRIVATE std::map<std::string, simgrid::surf::StorageImpl*> mount_list;
  33 XBT_PRIVATE std::vector<std::string> known_storages;
  34
  35 namespace simgrid {
  36 namespace surf {
  37
  38 simgrid::xbt::signal<void(ClusterCreationArgs*)> on_cluster;
  39 }
  40 }
  41
  42 static int surf_parse_models_setup_already_called = 0;
  43 std::map<std::string, simgrid::surf::StorageType*> storage_types;
  44
  45 /** The current AS in the parsing */
  46 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  47 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  48 {
  49   return current_routing;
  50 }
  51
  52 /** Module management function: creates all internal data structures */
  53 void sg_platf_init()
  54 { /* Do nothing: just for symmetry of user code */
  55 }
  56
  57 /** Module management function: frees all internal data structures */
  58 void sg_platf_exit() {
  59   simgrid::surf::on_cluster.disconnectSlots();
  60   simgrid::s4u::onPlatformCreated.disconnectSlots();
  61
  62   /* make sure that we will reinit the models while loading the platf once reinited */
  63   surf_parse_models_setup_already_called = 0;
  64   surf_parse_lex_destroy();
  65 }
  66
  67 /** @brief Add an host to the current AS */
  68 void sg_platf_new_host(sg_platf_host_cbarg_t args)
  69 {
  70   std::map<std::string, std::string> props;
  71   if (args->properties) {
  72     for (auto const& elm : *args->properties)
  73       props.insert({elm.first, elm.second});
  74     delete args->properties;
  75   }
  76
  77   simgrid::s4u::Host* host =
  78       routing_get_current()->createHost(args->id, &args->speed_per_pstate, args->core_amount, &props);
  79
  80   host->pimpl_->storage_ = mount_list;
  81   mount_list.clear();
  82
  83   /* Change from the defaults */
  84   if (args->state_trace)
  85     host->pimpl_cpu->setStateTrace(args->state_trace);
  86   if (args->speed_trace)
  87     host->pimpl_cpu->setSpeedTrace(args->speed_trace);
  88   if (args->pstate != 0)
  89     host->pimpl_cpu->setPState(args->pstate);
  90   if (args->coord && strcmp(args->coord, ""))
  91     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
  92 }
  93
  94 /** @brief Add a "router" to the network element list */
  95 simgrid::kernel::routing::NetPoint* sg_platf_new_router(std::string name, const char* coords)
  96 {
  97   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
  98
  99   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 100     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
 101   xbt_assert(nullptr == simgrid::s4u::Engine::getInstance()->getNetpointByNameOrNull(name),
 102              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
 103
 104   simgrid::kernel::routing::NetPoint* netpoint =
 105       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
 106   XBT_DEBUG("Router '%s' has the id %u", name.c_str(), netpoint->id());
 107
 108   if (coords && strcmp(coords, ""))
 109     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
 110
 111
 112   return netpoint;
 113 }
 114
 115 void sg_platf_new_link(LinkCreationArgs* link)
 116 {
 117   std::vector<std::string> names;
 118
 119   if (link->policy == SURF_LINK_SPLITDUPLEX) {
 120     names.push_back(link->id+ "_UP");
 121     names.push_back(link->id+ "_DOWN");
 122   } else {
 123     names.push_back(link->id);
 124   }
 125   for (auto const& link_name : names) {
 126     simgrid::surf::LinkImpl* l =
 127         surf_network_model->createLink(link_name, link->bandwidth, link->latency, link->policy);
 128
 129     if (link->properties) {
 130       for (auto const& elm : *link->properties)
 131         l->setProperty(elm.first, elm.second);
 132     }
 133
 134     if (link->latency_trace)
 135       l->setLatencyTrace(link->latency_trace);
 136     if (link->bandwidth_trace)
 137       l->setBandwidthTrace(link->bandwidth_trace);
 138     if (link->state_trace)
 139       l->setStateTrace(link->state_trace);
 140   }
 141   delete link->properties;
 142 }
 143
 144 void sg_platf_new_cluster(ClusterCreationArgs* cluster)
 145 {
 146   using simgrid::kernel::routing::ClusterZone;
 147   using simgrid::kernel::routing::DragonflyZone;
 148   using simgrid::kernel::routing::FatTreeZone;
 149   using simgrid::kernel::routing::TorusZone;
 150
 151   int rankId=0;
 152
 153   // What an inventive way of initializing the AS that I have as ancestor :-(
 154   ZoneCreationArgs zone;
 155   zone.id = cluster->id;
 156   switch (cluster->topology) {
 157     case ClusterTopology::TORUS:
 158       zone.routing = A_surfxml_AS_routing_ClusterTorus;
 159       break;
 160     case ClusterTopology::DRAGONFLY:
 161       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
 162       break;
 163     case ClusterTopology::FAT_TREE:
 164       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
 165       break;
 166     default:
 167       zone.routing = A_surfxml_AS_routing_Cluster;
 168       break;
 169   }
 170   sg_platf_new_Zone_begin(&zone);
 171   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
 172   current_as->parse_specific_arguments(cluster);
 173
 174   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 175     current_as->linkCountPerNode_++;
 176     current_as->hasLoopback_ = true;
 177   }
 178
 179   if(cluster->limiter_link > 0){
 180     current_as->linkCountPerNode_++;
 181     current_as->hasLimiter_ = true;
 182   }
 183
 184   for (int const& i : *cluster->radicals) {
 185     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 186     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 187
 188     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
 189
 190     s_sg_platf_host_cbarg_t host;
 191     host.id = host_id.c_str();
 192     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
 193       host.properties = new std::map<std::string, std::string>;
 194
 195       for (auto const& elm : *cluster->properties)
 196         host.properties->insert({elm.first, elm.second});
 197     }
 198
 199     host.speed_per_pstate = cluster->speeds;
 200     host.pstate = 0;
 201     host.core_amount = cluster->core_amount;
 202     host.coord = "";
 203     sg_platf_new_host(&host);
 204     XBT_DEBUG("</host>");
 205
 206     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 207
 208     // All links are saved in a matrix;
 209     // every row describes a single node; every node may have multiple links.
 210     // the first column may store a link from x to x if p_has_loopback is set
 211     // the second column may store a limiter link if p_has_limiter is set
 212     // other columns are to store one or more link for the node
 213
 214     //add a loopback link
 215     simgrid::surf::LinkImpl* linkUp   = nullptr;
 216     simgrid::surf::LinkImpl* linkDown = nullptr;
 217     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 218       std::string tmp_link = link_id + "_loopback";
 219       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
 220
 221       LinkCreationArgs link;
 222       link.id        = tmp_link;
 223       link.bandwidth = cluster->loopback_bw;
 224       link.latency   = cluster->loopback_lat;
 225       link.policy    = SURF_LINK_FATPIPE;
 226       sg_platf_new_link(&link);
 227       linkUp   = simgrid::surf::LinkImpl::byName(tmp_link);
 228       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
 229
 230       auto* as_cluster = static_cast<ClusterZone*>(current_as);
 231       as_cluster->privateLinks_.insert({as_cluster->nodePosition(rankId), {linkUp, linkDown}});
 232     }
 233
 234     //add a limiter link (shared link to account for maximal bandwidth of the node)
 235     linkUp   = nullptr;
 236     linkDown = nullptr;
 237     if(cluster->limiter_link > 0){
 238       std::string tmp_link = std::string(link_id) + "_limiter";
 239       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
 240
 241       LinkCreationArgs link;
 242       link.id        = tmp_link;
 243       link.bandwidth = cluster->limiter_link;
 244       link.latency = 0;
 245       link.policy = SURF_LINK_SHARED;
 246       sg_platf_new_link(&link);
 247       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
 248       linkUp   = linkDown;
 249       current_as->privateLinks_.insert({current_as->nodePositionWithLoopback(rankId), {linkUp, linkDown}});
 250     }
 251
 252     //call the cluster function that adds the others links
 253     if (cluster->topology == ClusterTopology::FAT_TREE) {
 254       static_cast<FatTreeZone*>(current_as)->addProcessingNode(i);
 255     } else {
 256       current_as->create_links_for_node(cluster, i, rankId, current_as->nodePositionWithLimiter(rankId));
 257     }
 258     rankId++;
 259   }
 260   delete cluster->properties;
 261
 262   // Add a router.
 263   XBT_DEBUG(" ");
 264   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 265   if (cluster->router_id.empty()) {
 266     std::string newid   = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 267     current_as->router_ = sg_platf_new_router(newid, NULL);
 268   } else {
 269     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
 270   }
 271
 272   //Make the backbone
 273   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 274
 275     LinkCreationArgs link;
 276     link.id        = std::string(cluster->id)+ "_backbone";
 277     link.bandwidth = cluster->bb_bw;
 278     link.latency   = cluster->bb_lat;
 279     link.policy    = cluster->bb_sharing_policy;
 280
 281     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
 282     sg_platf_new_link(&link);
 283
 284     routing_cluster_add_backbone(simgrid::surf::LinkImpl::byName(link.id));
 285   }
 286
 287   XBT_DEBUG("</AS>");
 288   sg_platf_new_Zone_seal();
 289
 290   simgrid::surf::on_cluster(cluster);
 291   delete cluster->radicals;
 292 }
 293
 294 void routing_cluster_add_backbone(simgrid::surf::LinkImpl* bb)
 295 {
 296   simgrid::kernel::routing::ClusterZone* cluster =
 297       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 298
 299   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 300   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->getCname());
 301
 302   cluster->backbone_ = bb;
 303   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->getCname());
 304 }
 305
 306 void sg_platf_new_cabinet(CabinetCreationArgs* cabinet)
 307 {
 308   for (int const& radical : *cabinet->radicals) {
 309     std::string hostname = cabinet->prefix + std::to_string(radical) + cabinet->suffix;
 310     s_sg_platf_host_cbarg_t host;
 311     host.pstate           = 0;
 312     host.core_amount      = 1;
 313     host.id               = hostname.c_str();
 314     host.speed_per_pstate.push_back(cabinet->speed);
 315     sg_platf_new_host(&host);
 316
 317     LinkCreationArgs link;
 318     link.policy    = SURF_LINK_SPLITDUPLEX;
 319     link.latency   = cabinet->lat;
 320     link.bandwidth = cabinet->bw;
 321     link.id        = "link_" + hostname;
 322     sg_platf_new_link(&link);
 323
 324     HostLinkCreationArgs host_link;
 325     host_link.id        = hostname;
 326     host_link.link_up   = std::string("link_") + hostname + "_UP";
 327     host_link.link_down = std::string("link_") + hostname + "_DOWN";
 328     sg_platf_new_hostlink(&host_link);
 329   }
 330   delete cabinet->radicals;
 331 }
 332
 333 void sg_platf_new_storage(StorageCreationArgs* storage)
 334 {
 335   xbt_assert(std::find(known_storages.begin(), known_storages.end(), storage->id) == known_storages.end(),
 336              "Refusing to add a second storage named \"%s\"", storage->id.c_str());
 337
 338   simgrid::surf::StorageType* stype;
 339   auto st = storage_types.find(storage->type_id);
 340   if (st != storage_types.end()) {
 341     stype = st->second;
 342   } else {
 343     xbt_die("No storage type '%s'", storage->type_id.c_str());
 344   }
 345
 346   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id.c_str(),
 347             storage->type_id.c_str(), storage->content.c_str());
 348
 349   known_storages.push_back(storage->id);
 350
 351   // if storage content is not specified use the content of storage_type if any
 352   if (storage->content.empty() && not stype->content.empty()) {
 353     storage->content = stype->content;
 354     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s)", storage->id.c_str(),
 355               stype->id.c_str());
 356   }
 357
 358   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
 359             "\n\t\tmodel '%s' \n\t\tcontent '%s' "
 360             "\n\t\tproperties '%p''\n",
 361             storage->id.c_str(), stype->model.c_str(), stype->id.c_str(), storage->content.c_str(),
 362             storage->properties);
 363
 364   auto s = surf_storage_model->createStorage(storage->id, stype->id, storage->content, storage->attach);
 365
 366   if (storage->properties) {
 367     for (auto const& elm : *storage->properties)
 368       s->setProperty(elm.first, elm.second);
 369     delete storage->properties;
 370   }
 371 }
 372
 373 void sg_platf_new_storage_type(StorageTypeCreationArgs* storage_type)
 374 {
 375   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
 376              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
 377
 378   simgrid::surf::StorageType* stype =
 379       new simgrid::surf::StorageType(storage_type->id, storage_type->model, storage_type->content,
 380                                      storage_type->properties, storage_type->model_properties, storage_type->size);
 381
 382   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
 383             storage_type->model.c_str(), storage_type->content.c_str());
 384
 385   storage_types[storage_type->id] = stype;
 386 }
 387
 388 void sg_platf_new_mount(MountCreationArgs* mount)
 389 {
 390   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
 391              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
 392
 393   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
 394
 395   if (mount_list.empty())
 396     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
 397   mount_list.insert({mount->name, simgrid::surf::StorageImpl::byName(mount->storageId.c_str())});
 398 }
 399
 400 void sg_platf_new_route(RouteCreationArgs* route)
 401 {
 402   routing_get_current()->addRoute(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 403                                   route->symmetrical);
 404 }
 405
 406 void sg_platf_new_bypassRoute(RouteCreationArgs* bypassRoute)
 407 {
 408   routing_get_current()->addBypassRoute(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 409                                         bypassRoute->link_list, bypassRoute->symmetrical);
 410 }
 411
 412 void sg_platf_new_actor(ActorCreationArgs* actor)
 413 {
 414   sg_host_t host = sg_host_by_name(actor->host);
 415   if (not host) {
 416     // The requested host does not exist. Do a nice message to the user
 417     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 418                       "' does not exist\nExisting hosts: '";
 419
 420     std::vector<simgrid::s4u::Host*> list;
 421     simgrid::s4u::Engine::getInstance()->getHostList(&list);
 422
 423     for (auto const& host : list) {
 424       msg += host->getName();
 425       msg += "', '";
 426       if (msg.length() > 1024) {
 427         msg.pop_back(); // remove trailing quote
 428         msg += "...(list truncated)......";
 429         break;
 430       }
 431     }
 432     xbt_die("%s", msg.c_str());
 433   }
 434   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
 435   xbt_assert(factory, "Function '%s' unknown", actor->function);
 436
 437   double start_time = actor->start_time;
 438   double kill_time  = actor->kill_time;
 439   bool auto_restart = actor->on_failure != ActorOnFailure::DIE;
 440
 441   std::string actor_name     = actor->args[0];
 442   std::function<void()> code = factory(std::move(actor->args));
 443   std::shared_ptr<std::map<std::string, std::string>> properties(actor->properties);
 444
 445   simgrid::simix::ProcessArg* arg =
 446       new simgrid::simix::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 447
 448   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
 449
 450   if (start_time > SIMIX_get_clock()) {
 451
 452     arg = new simgrid::simix::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 453
 454     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->getCname(), start_time);
 455     SIMIX_timer_set(start_time, [arg, auto_restart]() {
 456       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
 457                                                                 arg->host, arg->properties.get(), nullptr);
 458       if (arg->kill_time >= 0)
 459         simcall_process_set_kill_time(actor, arg->kill_time);
 460       if (auto_restart)
 461         SIMIX_process_auto_restart_set(actor, auto_restart);
 462       delete arg;
 463     });
 464   } else {                      // start_time <= SIMIX_get_clock()
 465     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->getCname());
 466
 467     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
 468                                                               arg->properties.get(), nullptr);
 469
 470     /* The actor creation will fail if the host is currently dead, but that's fine */
 471     if (actor != nullptr) {
 472       if (arg->kill_time >= 0)
 473         simcall_process_set_kill_time(actor, arg->kill_time);
 474       if (auto_restart)
 475         SIMIX_process_auto_restart_set(actor, auto_restart);
 476     }
 477   }
 478 }
 479
 480 void sg_platf_new_peer(PeerCreationArgs* peer)
 481 {
 482   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 483   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
 484
 485   std::vector<double> speedPerPstate;
 486   speedPerPstate.push_back(peer->speed);
 487   simgrid::s4u::Host* host = as->createHost(peer->id.c_str(), &speedPerPstate, 1, nullptr);
 488
 489   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
 490
 491   /* Change from the defaults */
 492   if (peer->state_trace)
 493     host->pimpl_cpu->setStateTrace(peer->state_trace);
 494   if (peer->speed_trace)
 495     host->pimpl_cpu->setSpeedTrace(peer->speed_trace);
 496 }
 497
 498 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
 499
 500 void sg_platf_end() {
 501   simgrid::s4u::onPlatformCreated();
 502 }
 503
 504 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
 505 static void surf_config_models_setup()
 506 {
 507   std::string host_model_name    = xbt_cfg_get_string("host/model");
 508   std::string network_model_name = xbt_cfg_get_string("network/model");
 509   std::string cpu_model_name     = xbt_cfg_get_string("cpu/model");
 510   std::string storage_model_name = xbt_cfg_get_string("storage/model");
 511
 512   /* The compound host model is needed when using non-default net/cpu models */
 513   if ((not xbt_cfg_is_default_value("network/model") || not xbt_cfg_is_default_value("cpu/model")) &&
 514       xbt_cfg_is_default_value("host/model")) {
 515     host_model_name = "compound";
 516     xbt_cfg_set_string("host/model", host_model_name.c_str());
 517   }
 518
 519   XBT_DEBUG("host model: %s", host_model_name.c_str());
 520   if (host_model_name == "compound") {
 521     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
 522     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
 523
 524     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
 525     surf_cpu_model_description[cpu_id].model_init_preparse();
 526
 527     int network_id = find_model_description(surf_network_model_description, network_model_name);
 528     surf_network_model_description[network_id].model_init_preparse();
 529   }
 530
 531   XBT_DEBUG("Call host_model_init");
 532   int host_id = find_model_description(surf_host_model_description, host_model_name);
 533   surf_host_model_description[host_id].model_init_preparse();
 534
 535   XBT_DEBUG("Call vm_model_init");
 536   surf_vm_model_init_HL13();
 537
 538   XBT_DEBUG("Call storage_model_init");
 539   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
 540   surf_storage_model_description[storage_id].model_init_preparse();
 541 }
 542
 543 /**
 544  * \brief Add a Zone to the platform
 545  *
 546  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 547  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 548  *
 549  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 550  *
 551  * @param zone the parameters defining the Zone to build.
 552  */
 553 simgrid::s4u::NetZone* sg_platf_new_Zone_begin(ZoneCreationArgs* zone)
 554 {
 555   if (not surf_parse_models_setup_already_called) {
 556     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 557      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
 558      *
 559      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 560      * (FIXME: check it out by creating a file beginning with one of these tags)
 561      * but cluster and peer create ASes internally, so putting the code in there is ok.
 562      */
 563     surf_parse_models_setup_already_called = 1;
 564     surf_config_models_setup();
 565   }
 566
 567   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
 568                             * any further config now that we created some real content */
 569
 570   /* search the routing model */
 571   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 572   switch (zone->routing) {
 573     case A_surfxml_AS_routing_Cluster:
 574       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id);
 575       break;
 576     case A_surfxml_AS_routing_ClusterDragonfly:
 577       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id);
 578       break;
 579     case A_surfxml_AS_routing_ClusterTorus:
 580       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id);
 581       break;
 582     case A_surfxml_AS_routing_ClusterFatTree:
 583       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id);
 584       break;
 585     case A_surfxml_AS_routing_Dijkstra:
 586       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, false);
 587       break;
 588     case A_surfxml_AS_routing_DijkstraCache:
 589       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, true);
 590       break;
 591     case A_surfxml_AS_routing_Floyd:
 592       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id);
 593       break;
 594     case A_surfxml_AS_routing_Full:
 595       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id);
 596       break;
 597     case A_surfxml_AS_routing_None:
 598       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id);
 599       break;
 600     case A_surfxml_AS_routing_Vivaldi:
 601       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id);
 602       break;
 603     default:
 604       xbt_die("Not a valid model!");
 605       break;
 606   }
 607
 608   if (current_routing == nullptr) { /* it is the first one */
 609     xbt_assert(simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ == nullptr,
 610                "All defined components must belong to a networking zone.");
 611     simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ = new_zone;
 612
 613   } else {
 614     /* set the father behavior */
 615     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 616       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
 617     /* add to the sons dictionary */
 618     current_routing->getChildren()->push_back(static_cast<simgrid::s4u::NetZone*>(new_zone));
 619   }
 620
 621   /* set the new current component of the tree */
 622   current_routing = new_zone;
 623
 624   simgrid::s4u::NetZone::onCreation(*new_zone); // notify the signal
 625
 626   return new_zone;
 627 }
 628
 629 /**
 630  * \brief Specify that the description of the current AS is finished
 631  *
 632  * Once you've declared all the content of your AS, you have to seal
 633  * it with this call. Your AS is not usable until you call this function.
 634  */
 635 void sg_platf_new_Zone_seal()
 636 {
 637   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
 638   current_routing->seal();
 639   simgrid::s4u::NetZone::onSeal(*current_routing);
 640   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->getFather());
 641 }
 642
 643 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
 644 void sg_platf_new_hostlink(HostLinkCreationArgs* hostlink)
 645 {
 646   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id.c_str())->pimpl_netpoint;
 647   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 648   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 649              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
 650
 651   simgrid::surf::LinkImpl* linkUp   = simgrid::surf::LinkImpl::byName(hostlink->link_up);
 652   simgrid::surf::LinkImpl* linkDown = simgrid::surf::LinkImpl::byName(hostlink->link_down);
 653
 654   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 655   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 656
 657   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 658
 659   if (as_cluster->privateLinks_.find(netpoint->id()) != as_cluster->privateLinks_.end())
 660     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
 661
 662   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->getCname(), netpoint->id());
 663   as_cluster->privateLinks_.insert({netpoint->id(), {linkUp, linkDown}});
 664 }
 665
 666 void sg_platf_new_trace(TraceCreationArgs* trace)
 667 {
 668   tmgr_trace_t tmgr_trace;
 669   if (not trace->file.empty()) {
 670     tmgr_trace = tmgr_trace_new_from_file(trace->file);
 671   } else {
 672     xbt_assert(not trace->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 673                trace->id.c_str());
 674     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
 675   }
 676   traces_set_list.insert({trace->id, tmgr_trace});
 677 }