src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2021. 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/Exception.hpp"
   7 #include "simgrid/kernel/routing/ClusterZone.hpp"
   8 #include "simgrid/kernel/routing/DijkstraZone.hpp"
   9 #include "simgrid/kernel/routing/DragonflyZone.hpp"
  10 #include "simgrid/kernel/routing/EmptyZone.hpp"
  11 #include "simgrid/kernel/routing/FatTreeZone.hpp"
  12 #include "simgrid/kernel/routing/FloydZone.hpp"
  13 #include "simgrid/kernel/routing/FullZone.hpp"
  14 #include "simgrid/kernel/routing/NetPoint.hpp"
  15 #include "simgrid/kernel/routing/NetZoneImpl.hpp"
  16 #include "simgrid/kernel/routing/TorusZone.hpp"
  17 #include "simgrid/kernel/routing/VivaldiZone.hpp"
  18 #include "simgrid/kernel/routing/WifiZone.hpp"
  19 #include "simgrid/s4u/Engine.hpp"
  20 #include "src/include/simgrid/sg_config.hpp"
  21 #include "src/include/surf/surf.hpp"
  22 #include "src/kernel/EngineImpl.hpp"
  23 #include "src/kernel/resource/DiskImpl.hpp"
  24 #include "src/kernel/resource/profile/Profile.hpp"
  25 #include "src/simix/smx_private.hpp"
  26 #include "src/surf/HostImpl.hpp"
  27 #include "src/surf/xml/platf_private.hpp"
  28
  29 #include <string>
  30
  31 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  32
  33 namespace simgrid {
  34 namespace kernel {
  35 namespace routing {
  36 xbt::signal<void(ClusterCreationArgs const&)> on_cluster_creation;
  37 } // namespace routing
  38 } // namespace kernel
  39 } // namespace simgrid
  40
  41 /** The current NetZone in the parsing */
  42 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  43 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  44 {
  45   return current_routing;
  46 }
  47 static simgrid::s4u::Host* current_host = nullptr;
  48
  49 /** Module management function: creates all internal data structures */
  50 void sg_platf_init()
  51 {
  52   // Do nothing: just for symmetry of user code
  53 }
  54
  55 /** Module management function: frees all internal data structures */
  56 void sg_platf_exit()
  57 {
  58   simgrid::kernel::routing::on_cluster_creation.disconnect_slots();
  59   simgrid::s4u::Engine::on_platform_created.disconnect_slots();
  60
  61   surf_parse_lex_destroy();
  62 }
  63
  64 /** @brief Add a host to the current NetZone */
  65 void sg_platf_new_host_begin(const simgrid::kernel::routing::HostCreationArgs* args)
  66 {
  67   current_host = routing_get_current()
  68                      ->create_host(args->id, args->speed_per_pstate)
  69                      ->set_coordinates(args->coord)
  70                      ->set_core_count(args->core_amount)
  71                      ->set_state_profile(args->state_trace)
  72                      ->set_speed_profile(args->speed_trace);
  73 }
  74
  75 void sg_platf_new_host_set_properties(const std::unordered_map<std::string, std::string>& props)
  76 {
  77   xbt_assert(current_host, "Cannot set properties of the current host: none under construction");
  78   current_host->set_properties(props);
  79 }
  80
  81 void sg_platf_new_host_seal(int pstate)
  82 {
  83   xbt_assert(current_host, "Cannot seal the current Host: none under construction");
  84   current_host->seal();
  85
  86   /* When energy plugin is activated, changing the pstate requires to already have the HostEnergy extension whose
  87    * allocation is triggered by the on_creation signal. Then set_pstate must be called after the signal emission */
  88
  89   if (pstate != 0)
  90     current_host->set_pstate(pstate);
  91
  92   current_host = nullptr;
  93 }
  94
  95 void sg_platf_new_peer(const simgrid::kernel::routing::PeerCreationArgs* args)
  96 {
  97   auto* zone = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
  98   xbt_assert(zone, "<peer> tag can only be used in Vivaldi netzones.");
  99
 100   const auto* peer = zone->create_host(args->id, std::vector<double>{args->speed})
 101                          ->set_state_profile(args->state_trace)
 102                          ->set_speed_profile(args->speed_trace)
 103                          ->set_coordinates(args->coord)
 104                          ->seal();
 105
 106   zone->set_peer_link(peer->get_netpoint(), args->bw_in, args->bw_out);
 107 }
 108
 109 /** @brief Add a "router" to the network element list */
 110 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const std::string& name, const std::string& coords)
 111 {
 112   auto* netpoint = current_routing->create_router(name)->set_coordinates(coords);
 113   XBT_DEBUG("Router '%s' has the id %u", netpoint->get_cname(), netpoint->id());
 114
 115   return netpoint;
 116 }
 117
 118 static void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* args, const std::string& link_name)
 119 {
 120   routing_get_current()
 121       ->create_link(link_name, args->bandwidths)
 122       ->set_properties(args->properties)
 123       ->get_impl() // this call to get_impl saves some simcalls but can be removed
 124       ->set_sharing_policy(args->policy)
 125       ->set_state_profile(args->state_trace)
 126       ->set_latency_profile(args->latency_trace)
 127       ->set_bandwidth_profile(args->bandwidth_trace)
 128       ->set_latency(args->latency)
 129       ->seal();
 130 }
 131
 132 void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* link)
 133 {
 134   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 135     sg_platf_new_link(link, link->id + "_UP");
 136     sg_platf_new_link(link, link->id + "_DOWN");
 137   } else {
 138     sg_platf_new_link(link, link->id);
 139   }
 140 }
 141
 142 void sg_platf_new_disk(const simgrid::kernel::routing::DiskCreationArgs* disk)
 143 {
 144   const simgrid::s4u::Disk* new_disk = routing_get_current()
 145                                            ->create_disk(disk->id, disk->read_bw, disk->write_bw)
 146                                            ->set_host(current_host)
 147                                            ->set_properties(disk->properties)
 148                                            ->seal();
 149
 150   current_host->add_disk(new_disk);
 151 }
 152
 153 /** @brief Auxiliary function to create hosts */
 154 static std::pair<simgrid::kernel::routing::NetPoint*, simgrid::kernel::routing::NetPoint*>
 155 sg_platf_cluster_create_host(const simgrid::kernel::routing::ClusterCreationArgs* cluster, simgrid::s4u::NetZone* zone,
 156                              const std::vector<unsigned int>& /*coord*/, int id)
 157 {
 158   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 159              "Zone(%s): error when creating host number %d in the zone. Insufficient number of radicals available "
 160              "(total = %zu). Check the 'radical' parameter in XML",
 161              cluster->id.c_str(), id, cluster->radicals.size());
 162
 163   std::string host_id = std::string(cluster->prefix) + std::to_string(cluster->radicals[id]) + cluster->suffix;
 164   XBT_DEBUG("Cluster: creating host=%s speed=%f", host_id.c_str(), cluster->speeds.front());
 165   const simgrid::s4u::Host* host = zone->create_host(host_id, cluster->speeds)
 166                                        ->set_core_count(cluster->core_amount)
 167                                        ->set_properties(cluster->properties)
 168                                        ->seal();
 169   return std::make_pair(host->get_netpoint(), nullptr);
 170 }
 171
 172 /** @brief Auxiliary function to create loopback links */
 173 static simgrid::s4u::Link*
 174 sg_platf_cluster_create_loopback(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 175                                  simgrid::s4u::NetZone* zone, const std::vector<unsigned int>& /*coord*/, int id)
 176 {
 177   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 178              "Zone(%s): error when creating loopback for host number %d in the zone. Insufficient number of radicals "
 179              "available "
 180              "(total = %zu). Check the 'radical' parameter in XML",
 181              cluster->id.c_str(), id, cluster->radicals.size());
 182
 183   std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(cluster->radicals[id]) + "_loopback";
 184   XBT_DEBUG("Cluster: creating loopback link=%s bw=%f", link_id.c_str(), cluster->loopback_bw);
 185
 186   simgrid::s4u::Link* loopback = zone->create_link(link_id, cluster->loopback_bw)
 187                                      ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 188                                      ->set_latency(cluster->loopback_lat)
 189                                      ->seal();
 190   return loopback;
 191 }
 192
 193 /** @brief Auxiliary function to create limiter links */
 194 static simgrid::s4u::Link* sg_platf_cluster_create_limiter(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 195                                                            simgrid::s4u::NetZone* zone,
 196                                                            const std::vector<unsigned int>& /*coord*/, int id)
 197 {
 198   std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(id) + "_limiter";
 199   XBT_DEBUG("Cluster: creating limiter link=%s bw=%f", link_id.c_str(), cluster->limiter_link);
 200
 201   simgrid::s4u::Link* limiter = zone->create_link(link_id, cluster->limiter_link)->seal();
 202   return limiter;
 203 }
 204
 205 /** @brief Create Torus, Fat-Tree and Dragonfly clusters */
 206 static void sg_platf_new_cluster_hierarchical(const simgrid::kernel::routing::ClusterCreationArgs* cluster)
 207 {
 208   using namespace std::placeholders;
 209   using simgrid::kernel::routing::DragonflyZone;
 210   using simgrid::kernel::routing::FatTreeZone;
 211   using simgrid::kernel::routing::TorusZone;
 212
 213   auto set_host = std::bind(sg_platf_cluster_create_host, cluster, _1, _2, _3);
 214   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_loopback{};
 215   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_limiter{};
 216
 217   if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 218     set_loopback = std::bind(sg_platf_cluster_create_loopback, cluster, _1, _2, _3);
 219   }
 220
 221   if (cluster->limiter_link > 0) {
 222     set_limiter = std::bind(sg_platf_cluster_create_limiter, cluster, _1, _2, _3);
 223   }
 224
 225   simgrid::s4u::NetZone const* parent = routing_get_current() ? routing_get_current()->get_iface() : nullptr;
 226   simgrid::s4u::NetZone* zone;
 227   switch (cluster->topology) {
 228     case simgrid::kernel::routing::ClusterTopology::TORUS:
 229       zone = simgrid::s4u::create_torus_zone(
 230           cluster->id, parent, TorusZone::parse_topo_parameters(cluster->topo_parameters),
 231           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 232       break;
 233     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 234       zone = simgrid::s4u::create_dragonfly_zone(
 235           cluster->id, parent, DragonflyZone::parse_topo_parameters(cluster->topo_parameters),
 236           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 237       break;
 238     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 239       zone = simgrid::s4u::create_fatTree_zone(
 240           cluster->id, parent, FatTreeZone::parse_topo_parameters(cluster->topo_parameters),
 241           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 242       break;
 243     default:
 244       THROW_IMPOSSIBLE;
 245   }
 246   zone->seal();
 247 }
 248
 249 /** @brief Create regular Cluster */
 250 static void sg_platf_new_cluster_flat(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 251 {
 252   using simgrid::kernel::routing::ClusterZone;
 253
 254   int rankId = 0;
 255
 256   // What an inventive way of initializing the NetZone that I have as ancestor :-(
 257   simgrid::kernel::routing::ZoneCreationArgs zone;
 258   zone.id      = cluster->id;
 259   zone.routing = "Cluster";
 260   sg_platf_new_Zone_begin(&zone);
 261   auto* current_zone = static_cast<ClusterZone*>(routing_get_current());
 262   for (auto const& elm : cluster->properties)
 263     current_zone->get_iface()->set_property(elm.first, elm.second);
 264
 265   if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 266     current_zone->set_loopback();
 267   }
 268
 269   if (cluster->limiter_link > 0) {
 270     current_zone->set_limiter();
 271   }
 272
 273   for (int const& i : cluster->radicals) {
 274     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 275
 276     XBT_DEBUG("<host\tid=\"%s\"\tspeed=\"%f\">", host_id.c_str(), cluster->speeds.front());
 277     current_zone->create_host(host_id, cluster->speeds)
 278         ->set_core_count(cluster->core_amount)
 279         ->set_properties(cluster->properties)
 280         ->seal();
 281
 282     XBT_DEBUG("</host>");
 283
 284     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 285     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 286
 287     // All links are saved in a matrix;
 288     // every row describes a single node; every node may have multiple links.
 289     // the first column may store a link from x to x if p_has_loopback is set
 290     // the second column may store a limiter link if p_has_limiter is set
 291     // other columns are to store one or more link for the node
 292
 293     // add a loopback link
 294     simgrid::kernel::resource::LinkImpl* loopback = nullptr;
 295     if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 296       std::string loopback_name = link_id + "_loopback";
 297       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", loopback_name.c_str(), cluster->loopback_bw);
 298
 299       loopback = current_zone->create_link(loopback_name, std::vector<double>{cluster->loopback_bw})
 300                      ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 301                      ->set_latency(cluster->loopback_lat)
 302                      ->seal()
 303                      ->get_impl();
 304
 305       current_zone->add_private_link_at(current_zone->node_pos(rankId), {loopback, loopback});
 306     }
 307
 308     // add a limiter link (shared link to account for maximal bandwidth of the node)
 309     simgrid::kernel::resource::LinkImpl* limiter = nullptr;
 310     if (cluster->limiter_link > 0) {
 311       std::string limiter_name = std::string(link_id) + "_limiter";
 312       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", limiter_name.c_str(), cluster->limiter_link);
 313
 314       limiter = current_zone->create_link(limiter_name, std::vector<double>{cluster->limiter_link})->seal()->get_impl();
 315
 316       current_zone->add_private_link_at(current_zone->node_pos_with_loopback(rankId), {limiter, limiter});
 317     }
 318
 319     current_zone->set_link_characteristics(cluster->bw, cluster->lat, cluster->sharing_policy);
 320     // call the cluster function that adds the others links
 321     current_zone->create_links(i, rankId);
 322     rankId++;
 323   }
 324
 325   // Add a router.
 326   XBT_DEBUG(" ");
 327   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 328   if (cluster->router_id.empty())
 329     cluster->router_id = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 330   current_zone->set_router(current_zone->create_router(cluster->router_id));
 331
 332   // Make the backbone
 333   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 334     std::string bb_name = std::string(cluster->id) + "_backbone";
 335     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/> <!--backbone -->", bb_name.c_str(), cluster->bb_bw,
 336               cluster->bb_lat);
 337
 338     auto* backbone = current_zone->create_link(bb_name, std::vector<double>{cluster->bb_bw})
 339                          ->set_sharing_policy(cluster->bb_sharing_policy)
 340                          ->set_latency(cluster->bb_lat)
 341                          ->seal()
 342                          ->get_impl();
 343     current_zone->set_backbone(backbone);
 344   }
 345
 346   XBT_DEBUG("</zone>");
 347   sg_platf_new_Zone_seal();
 348 }
 349
 350 void sg_platf_new_cluster(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 351 {
 352   switch (cluster->topology) {
 353     case simgrid::kernel::routing::ClusterTopology::TORUS:
 354     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 355     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 356       sg_platf_new_cluster_hierarchical(cluster);
 357       break;
 358     default:
 359       sg_platf_new_cluster_flat(cluster);
 360       break;
 361   }
 362
 363   simgrid::kernel::routing::on_cluster_creation(*cluster);
 364 }
 365
 366 void routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl* bb)
 367 {
 368   auto* cluster = dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 369
 370   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 371   xbt_assert(not cluster->has_backbone(), "Cluster %s already has a backbone link!", cluster->get_cname());
 372
 373   cluster->set_backbone(bb);
 374   XBT_DEBUG("Add a backbone to zone '%s'", current_routing->get_cname());
 375 }
 376
 377 void sg_platf_new_cabinet(const simgrid::kernel::routing::CabinetCreationArgs* args)
 378 {
 379   auto* zone = static_cast<simgrid::kernel::routing::ClusterZone*>(routing_get_current());
 380   for (int const& radical : args->radicals) {
 381     std::string id   = args->prefix + std::to_string(radical) + args->suffix;
 382     auto const* host = zone->create_host(id, std::vector<double>{args->speed})->seal();
 383
 384     const auto* link_up =
 385         zone->create_link("link_" + id + "_UP", std::vector<double>{args->bw})->set_latency(args->lat)->seal();
 386
 387     const auto* link_down =
 388         zone->create_link("link_" + id + "_DOWN", std::vector<double>{args->bw})->set_latency(args->lat)->seal();
 389
 390     zone->add_private_link_at(host->get_netpoint()->id(), {link_up->get_impl(), link_down->get_impl()});
 391   }
 392 }
 393
 394 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 395 {
 396   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 397                                    route->symmetrical);
 398 }
 399
 400 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
 401 {
 402   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 403                                           bypassRoute->link_list, bypassRoute->symmetrical);
 404 }
 405
 406 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 407 {
 408   sg_host_t host = sg_host_by_name(actor->host);
 409   if (not host) {
 410     // The requested host does not exist. Do a nice message to the user
 411     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 412                       "' does not exist\nExisting hosts: '";
 413
 414     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
 415
 416     for (auto const& some_host : list) {
 417       msg += some_host->get_name();
 418       msg += "', '";
 419       if (msg.length() > 1024) {
 420         msg.pop_back(); // remove trailing quote
 421         msg += "...(list truncated)......";
 422         break;
 423       }
 424     }
 425     xbt_die("%s", msg.c_str());
 426   }
 427   const simgrid::kernel::actor::ActorCodeFactory& factory =
 428       simgrid::kernel::EngineImpl::get_instance()->get_function(actor->function);
 429   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
 430
 431   double start_time = actor->start_time;
 432   double kill_time  = actor->kill_time;
 433   bool auto_restart = actor->restart_on_failure;
 434
 435   std::string actor_name                 = actor->args[0];
 436   simgrid::kernel::actor::ActorCode code = factory(std::move(actor->args));
 437
 438   auto* arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 439                                                      auto_restart);
 440
 441   host->get_impl()->add_actor_at_boot(arg);
 442
 443   if (start_time > SIMIX_get_clock()) {
 444     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 445                                                  auto_restart);
 446
 447     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 448     simgrid::simix::Timer::set(start_time, [arg, auto_restart]() {
 449       simgrid::kernel::actor::ActorImplPtr new_actor =
 450           simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), arg->code, arg->data, arg->host, nullptr);
 451       new_actor->set_properties(arg->properties);
 452       if (arg->kill_time >= 0)
 453         new_actor->set_kill_time(arg->kill_time);
 454       if (auto_restart)
 455         new_actor->set_auto_restart(auto_restart);
 456       delete arg;
 457     });
 458   } else { // start_time <= SIMIX_get_clock()
 459     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
 460
 461     try {
 462       simgrid::kernel::actor::ActorImplPtr new_actor = nullptr;
 463       new_actor = simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), code, nullptr, host, nullptr);
 464       new_actor->set_properties(arg->properties);
 465       /* The actor creation will fail if the host is currently dead, but that's fine */
 466       if (arg->kill_time >= 0)
 467         new_actor->set_kill_time(arg->kill_time);
 468       if (auto_restart)
 469         new_actor->set_auto_restart(auto_restart);
 470     } catch (simgrid::HostFailureException const&) {
 471       XBT_WARN("Deployment includes some initially turned off Hosts ... nevermind.");
 472     }
 473   }
 474 }
 475
 476 /**
 477  * @brief Auxiliary function to build the object NetZoneImpl
 478  *
 479  * Builds the objects, setting its father properties and root netzone if needed
 480  * @param zone the parameters defining the Zone to build.
 481  * @return Pointer to recently created netzone
 482  */
 483 static simgrid::kernel::routing::NetZoneImpl*
 484 sg_platf_create_zone(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 485 {
 486   /* search the routing model */
 487   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 488
 489   if (strcasecmp(zone->routing.c_str(), "Cluster") == 0) {
 490     new_zone = new simgrid::kernel::routing::ClusterZone(zone->id);
 491   } else if (strcasecmp(zone->routing.c_str(), "ClusterDragonfly") == 0) {
 492     new_zone = new simgrid::kernel::routing::DragonflyZone(zone->id);
 493   } else if (strcasecmp(zone->routing.c_str(), "ClusterTorus") == 0) {
 494     new_zone = new simgrid::kernel::routing::TorusZone(zone->id);
 495   } else if (strcasecmp(zone->routing.c_str(), "ClusterFatTree") == 0) {
 496     new_zone = new simgrid::kernel::routing::FatTreeZone(zone->id);
 497   } else if (strcasecmp(zone->routing.c_str(), "Dijkstra") == 0) {
 498     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, false);
 499   } else if (strcasecmp(zone->routing.c_str(), "DijkstraCache") == 0) {
 500     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, true);
 501   } else if (strcasecmp(zone->routing.c_str(), "Floyd") == 0) {
 502     new_zone = new simgrid::kernel::routing::FloydZone(zone->id);
 503   } else if (strcasecmp(zone->routing.c_str(), "Full") == 0) {
 504     new_zone = new simgrid::kernel::routing::FullZone(zone->id);
 505   } else if (strcasecmp(zone->routing.c_str(), "None") == 0) {
 506     new_zone = new simgrid::kernel::routing::EmptyZone(zone->id);
 507   } else if (strcasecmp(zone->routing.c_str(), "Vivaldi") == 0) {
 508     new_zone = new simgrid::kernel::routing::VivaldiZone(zone->id);
 509   } else if (strcasecmp(zone->routing.c_str(), "Wifi") == 0) {
 510     new_zone = new simgrid::kernel::routing::WifiZone(zone->id);
 511   } else {
 512     xbt_die("Not a valid model!");
 513   }
 514   new_zone->set_parent(current_routing);
 515
 516   return new_zone;
 517 }
 518
 519 /**
 520  * @brief Add a Zone to the platform
 521  *
 522  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 523  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 524  *
 525  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 526  *
 527  * @param zone the parameters defining the Zone to build.
 528  */
 529 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_Zone_begin(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 530 {
 531   current_routing = sg_platf_create_zone(zone);
 532
 533   return current_routing;
 534 }
 535
 536 void sg_platf_new_Zone_set_properties(const std::unordered_map<std::string, std::string>& props)
 537 {
 538   xbt_assert(current_routing, "Cannot set properties of the current Zone: none under construction");
 539
 540   current_routing->set_properties(props);
 541 }
 542
 543 /**
 544  * @brief Specify that the description of the current Zone is finished
 545  *
 546  * Once you've declared all the content of your Zone, you have to seal
 547  * it with this call. Your Zone is not usable until you call this function.
 548  */
 549 void sg_platf_new_Zone_seal()
 550 {
 551   xbt_assert(current_routing, "Cannot seal the current Zone: none under construction");
 552   current_routing->seal();
 553   current_routing = current_routing->get_parent();
 554 }
 555
 556 /** @brief Add a link connecting a host to the rest of its Zone (which must be cluster or vivaldi) */
 557 void sg_platf_new_hostlink(const simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 558 {
 559   const simgrid::kernel::routing::NetPoint* netpoint = simgrid::s4u::Host::by_name(hostlink->id)->get_netpoint();
 560   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 561   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 562              "Only hosts from Cluster and Vivaldi Zones can get a host_link.");
 563
 564   const simgrid::s4u::Link* linkUp   = simgrid::s4u::Link::by_name_or_null(hostlink->link_up);
 565   const simgrid::s4u::Link* linkDown = simgrid::s4u::Link::by_name_or_null(hostlink->link_down);
 566
 567   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 568   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 569
 570   auto* cluster_zone = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 571
 572   if (cluster_zone->private_link_exists_at(netpoint->id()))
 573     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
 574
 575   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
 576   cluster_zone->add_private_link_at(netpoint->id(), {linkUp->get_impl(), linkDown->get_impl()});
 577 }
 578
 579 void sg_platf_new_trace(simgrid::kernel::routing::ProfileCreationArgs* args)
 580 {
 581   simgrid::kernel::profile::Profile* profile;
 582   if (not args->file.empty()) {
 583     profile = simgrid::kernel::profile::Profile::from_file(args->file);
 584   } else {
 585     xbt_assert(not args->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 586                args->id.c_str());
 587     profile = simgrid::kernel::profile::Profile::from_string(args->id, args->pc_data, args->periodicity);
 588   }
 589   traces_set_list.insert({args->id, profile});
 590 }