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 static int surf_parse_models_setup_already_called = 0;
  42
  43 /** The current AS in the parsing */
  44 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  45 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  46 {
  47   return current_routing;
  48 }
  49
  50 /** Module management function: creates all internal data structures */
  51 void sg_platf_init()
  52 {
  53   // Do nothing: just for symmetry of user code
  54 }
  55
  56 /** Module management function: frees all internal data structures */
  57 void sg_platf_exit()
  58 {
  59   simgrid::kernel::routing::on_cluster_creation.disconnect_slots();
  60   simgrid::s4u::Engine::on_platform_created.disconnect_slots();
  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 a host to the current AS */
  68 void sg_platf_new_host(const simgrid::kernel::routing::HostCreationArgs* args)
  69 {
  70   simgrid::s4u::Host* host = routing_get_current()->create_host(args->id, args->speed_per_pstate, args->core_amount);
  71
  72   if (args->properties) {
  73     host->set_properties(*args->properties);
  74     delete args->properties;
  75   }
  76
  77   host->pimpl_->set_disks(args->disks, host);
  78
  79   /* Change from the defaults */
  80   if (args->state_trace)
  81     host->set_state_profile(args->state_trace);
  82   if (args->speed_trace)
  83     host->set_speed_profile(args->speed_trace);
  84   if (not args->coord.empty())
  85     new simgrid::kernel::routing::vivaldi::Coords(host->get_netpoint(), args->coord);
  86
  87   simgrid::s4u::Host::on_creation(*host); // notify the signal
  88
  89   /* When energy plugin is activated, changing the pstate requires to already have the HostEnergy extension whose
  90    * allocation is triggered by the on_creation signal. Then set_pstate must be called after the signal emition */
  91   if (args->pstate != 0)
  92     host->set_pstate(args->pstate);
  93 }
  94
  95 /** @brief Add a "router" to the network element list */
  96 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const std::string& name, const char* coords)
  97 {
  98   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
  99     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
 100   xbt_assert(nullptr == simgrid::s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
 101              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
 102
 103   auto* netpoint = new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router);
 104   netpoint->set_englobing_zone(current_routing);
 105   XBT_DEBUG("Router '%s' has the id %u", netpoint->get_cname(), netpoint->id());
 106
 107   if (coords && strcmp(coords, ""))
 108     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
 109
 110   return netpoint;
 111 }
 112
 113 static void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* args, const std::string& link_name)
 114 {
 115   simgrid::s4u::Link* link = routing_get_current()->create_link(link_name, args->bandwidths, args->policy);
 116   if (args->policy != simgrid::s4u::Link::SharingPolicy::WIFI)
 117     link->get_impl()->set_latency(args->latency);
 118
 119   if (args->properties)
 120     link->set_properties(*args->properties);
 121
 122   simgrid::kernel::resource::LinkImpl* l = link->get_impl();
 123   if (args->latency_trace)
 124     l->set_latency_profile(args->latency_trace);
 125   if (args->bandwidth_trace)
 126     l->set_bandwidth_profile(args->bandwidth_trace);
 127   if (args->state_trace)
 128     l->set_state_profile(args->state_trace);
 129
 130   link->seal();
 131 }
 132
 133 void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* link)
 134 {
 135   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 136     sg_platf_new_link(link, link->id + "_UP");
 137     sg_platf_new_link(link, link->id + "_DOWN");
 138   } else {
 139     sg_platf_new_link(link, link->id);
 140   }
 141   delete link->properties;
 142 }
 143
 144 void sg_platf_new_cluster(simgrid::kernel::routing::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   simgrid::kernel::routing::ZoneCreationArgs zone;
 155   zone.id = cluster->id;
 156   switch (cluster->topology) {
 157     case simgrid::kernel::routing::ClusterTopology::TORUS:
 158       zone.routing = "ClusterTorus";
 159       break;
 160     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 161       zone.routing = "ClusterDragonfly";
 162       break;
 163     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 164       zone.routing = "ClusterFatTree";
 165       break;
 166     default:
 167       zone.routing = "Cluster";
 168       break;
 169   }
 170   sg_platf_new_Zone_begin(&zone);
 171   auto* current_as = static_cast<ClusterZone*>(routing_get_current());
 172   current_as->parse_specific_arguments(cluster);
 173   if (cluster->properties != nullptr)
 174     for (auto const& elm : *cluster->properties)
 175       current_as->get_iface()->set_property(elm.first, elm.second);
 176
 177   if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 178     current_as->set_loopback();
 179   }
 180
 181   if (cluster->limiter_link > 0) {
 182     current_as->set_limiter();
 183   }
 184
 185   for (int const& i : *cluster->radicals) {
 186     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 187     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 188
 189     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
 190
 191     simgrid::kernel::routing::HostCreationArgs host;
 192     host.id = host_id;
 193     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
 194       host.properties = new std::unordered_map<std::string, std::string>();
 195
 196       for (auto const& elm : *cluster->properties)
 197         host.properties->insert({elm.first, elm.second});
 198     }
 199
 200     host.speed_per_pstate = cluster->speeds;
 201     host.pstate           = 0;
 202     host.core_amount      = cluster->core_amount;
 203     host.coord            = "";
 204     sg_platf_new_host(&host);
 205     XBT_DEBUG("</host>");
 206
 207     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 208
 209     // All links are saved in a matrix;
 210     // every row describes a single node; every node may have multiple links.
 211     // the first column may store a link from x to x if p_has_loopback is set
 212     // the second column may store a limiter link if p_has_limiter is set
 213     // other columns are to store one or more link for the node
 214
 215     // add a loopback link
 216     const simgrid::s4u::Link* linkUp   = nullptr;
 217     const simgrid::s4u::Link* linkDown = nullptr;
 218     if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 219       std::string tmp_link = link_id + "_loopback";
 220       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
 221
 222       simgrid::kernel::routing::LinkCreationArgs link;
 223       link.id = tmp_link;
 224       link.bandwidths.push_back(cluster->loopback_bw);
 225       link.latency = cluster->loopback_lat;
 226       link.policy  = simgrid::s4u::Link::SharingPolicy::FATPIPE;
 227       sg_platf_new_link(&link);
 228       linkUp   = simgrid::s4u::Link::by_name_or_null(tmp_link);
 229       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
 230
 231       ClusterZone* as_cluster = current_as;
 232       as_cluster->add_private_link_at(as_cluster->node_pos(rankId), {linkUp->get_impl(), linkDown->get_impl()});
 233     }
 234
 235     // add a limiter link (shared link to account for maximal bandwidth of the node)
 236     linkUp   = nullptr;
 237     linkDown = nullptr;
 238     if (cluster->limiter_link > 0) {
 239       std::string tmp_link = std::string(link_id) + "_limiter";
 240       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
 241
 242       simgrid::kernel::routing::LinkCreationArgs link;
 243       link.id = tmp_link;
 244       link.bandwidths.push_back(cluster->limiter_link);
 245       link.latency = 0;
 246       link.policy  = simgrid::s4u::Link::SharingPolicy::SHARED;
 247       sg_platf_new_link(&link);
 248       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
 249       linkUp   = linkDown;
 250       current_as->add_private_link_at(current_as->node_pos_with_loopback(rankId),
 251                                       {linkUp->get_impl(), linkDown->get_impl()});
 252     }
 253
 254     // call the cluster function that adds the others links
 255     if (cluster->topology == simgrid::kernel::routing::ClusterTopology::FAT_TREE) {
 256       static_cast<FatTreeZone*>(current_as)->add_processing_node(i);
 257     } else {
 258       current_as->create_links_for_node(cluster, i, rankId, current_as->node_pos_with_loopback_limiter(rankId));
 259     }
 260     rankId++;
 261   }
 262   delete cluster->properties;
 263
 264   // Add a router.
 265   XBT_DEBUG(" ");
 266   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 267   if (cluster->router_id.empty())
 268     cluster->router_id = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 269   current_as->set_router(sg_platf_new_router(cluster->router_id, nullptr));
 270
 271   // Make the backbone
 272   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 273     simgrid::kernel::routing::LinkCreationArgs link;
 274     link.id = std::string(cluster->id) + "_backbone";
 275     link.bandwidths.push_back(cluster->bb_bw);
 276     link.latency = cluster->bb_lat;
 277     link.policy  = cluster->bb_sharing_policy;
 278
 279     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
 280     sg_platf_new_link(&link);
 281
 282     routing_cluster_add_backbone(simgrid::s4u::Link::by_name(link.id)->get_impl());
 283   }
 284
 285   XBT_DEBUG("</AS>");
 286   sg_platf_new_Zone_seal();
 287
 288   simgrid::kernel::routing::on_cluster_creation(*cluster);
 289   delete cluster->radicals;
 290 }
 291
 292 void routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl* bb)
 293 {
 294   auto* cluster = dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 295
 296   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 297   xbt_assert(not cluster->has_backbone(), "Cluster %s already has a backbone link!", cluster->get_cname());
 298
 299   cluster->set_backbone(bb);
 300   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->get_cname());
 301 }
 302
 303 void sg_platf_new_cabinet(const simgrid::kernel::routing::CabinetCreationArgs* cabinet)
 304 {
 305   for (int const& radical : *cabinet->radicals) {
 306     std::string hostname = cabinet->prefix + std::to_string(radical) + cabinet->suffix;
 307     simgrid::kernel::routing::HostCreationArgs host;
 308     host.pstate      = 0;
 309     host.core_amount = 1;
 310     host.id          = hostname;
 311     host.speed_per_pstate.push_back(cabinet->speed);
 312     sg_platf_new_host(&host);
 313
 314     simgrid::kernel::routing::LinkCreationArgs link;
 315     link.policy  = simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX;
 316     link.latency = cabinet->lat;
 317     link.bandwidths.push_back(cabinet->bw);
 318     link.id = "link_" + hostname;
 319     sg_platf_new_link(&link);
 320
 321     simgrid::kernel::routing::HostLinkCreationArgs host_link;
 322     host_link.id        = hostname;
 323     host_link.link_up   = std::string("link_") + hostname + "_UP";
 324     host_link.link_down = std::string("link_") + hostname + "_DOWN";
 325     sg_platf_new_hostlink(&host_link);
 326   }
 327   delete cabinet->radicals;
 328 }
 329
 330 simgrid::kernel::resource::DiskImpl* sg_platf_new_disk(const simgrid::kernel::routing::DiskCreationArgs* disk)
 331 {
 332   simgrid::kernel::resource::DiskImpl* pimpl =
 333       routing_get_current()->create_disk(disk->id, disk->read_bw, disk->write_bw)->get_impl();
 334
 335   if (disk->properties) {
 336     pimpl->set_properties(*disk->properties);
 337     delete disk->properties;
 338   }
 339
 340   pimpl->seal();
 341   simgrid::s4u::Disk::on_creation(*pimpl->get_iface());
 342   return pimpl;
 343 }
 344
 345 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 346 {
 347   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 348                                    route->symmetrical);
 349 }
 350
 351 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
 352 {
 353   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 354                                           bypassRoute->link_list, bypassRoute->symmetrical);
 355 }
 356
 357 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 358 {
 359   sg_host_t host = sg_host_by_name(actor->host);
 360   if (not host) {
 361     // The requested host does not exist. Do a nice message to the user
 362     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 363                       "' does not exist\nExisting hosts: '";
 364
 365     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
 366
 367     for (auto const& some_host : list) {
 368       msg += some_host->get_name();
 369       msg += "', '";
 370       if (msg.length() > 1024) {
 371         msg.pop_back(); // remove trailing quote
 372         msg += "...(list truncated)......";
 373         break;
 374       }
 375     }
 376     xbt_die("%s", msg.c_str());
 377   }
 378   const simgrid::kernel::actor::ActorCodeFactory& factory =
 379       simgrid::kernel::EngineImpl::get_instance()->get_function(actor->function);
 380   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
 381
 382   double start_time = actor->start_time;
 383   double kill_time  = actor->kill_time;
 384   bool auto_restart = actor->restart_on_failure;
 385
 386   std::string actor_name                 = actor->args[0];
 387   simgrid::kernel::actor::ActorCode code = factory(std::move(actor->args));
 388   std::shared_ptr<std::unordered_map<std::string, std::string>> properties(actor->properties);
 389
 390   auto* arg =
 391       new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 392
 393   host->pimpl_->add_actor_at_boot(arg);
 394
 395   if (start_time > SIMIX_get_clock()) {
 396     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 397
 398     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 399     simgrid::simix::Timer::set(start_time, [arg, auto_restart]() {
 400       simgrid::kernel::actor::ActorImplPtr new_actor = simgrid::kernel::actor::ActorImpl::create(
 401           arg->name.c_str(), arg->code, arg->data, arg->host, arg->properties.get(), nullptr);
 402       if (arg->kill_time >= 0)
 403         new_actor->set_kill_time(arg->kill_time);
 404       if (auto_restart)
 405         new_actor->set_auto_restart(auto_restart);
 406       delete arg;
 407     });
 408   } else { // start_time <= SIMIX_get_clock()
 409     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
 410
 411     try {
 412       simgrid::kernel::actor::ActorImplPtr new_actor = nullptr;
 413       new_actor = simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), code, nullptr, host,
 414                                                             arg->properties.get(), nullptr);
 415       /* The actor creation will fail if the host is currently dead, but that's fine */
 416       if (arg->kill_time >= 0)
 417         new_actor->set_kill_time(arg->kill_time);
 418       if (auto_restart)
 419         new_actor->set_auto_restart(auto_restart);
 420     } catch (simgrid::HostFailureException const&) {
 421       XBT_WARN("Deployment includes some initially turned off Hosts ... nevermind.");
 422     }
 423   }
 424 }
 425
 426 void sg_platf_new_peer(const simgrid::kernel::routing::PeerCreationArgs* peer)
 427 {
 428   auto* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 429   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
 430
 431   std::vector<double> speed_per_pstate;
 432   speed_per_pstate.push_back(peer->speed);
 433   simgrid::s4u::Host* host = as->create_host(peer->id, speed_per_pstate, 1);
 434
 435   as->set_peer_link(host->get_netpoint(), peer->bw_in, peer->bw_out, peer->coord);
 436
 437   /* Change from the defaults */
 438   if (peer->state_trace)
 439     host->set_state_profile(peer->state_trace);
 440   if (peer->speed_trace)
 441     host->set_speed_profile(peer->speed_trace);
 442   simgrid::s4u::Host::on_creation(*host); // notify the signal
 443 }
 444
 445 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
 446 static void surf_config_models_setup()
 447 {
 448   std::string host_model_name    = simgrid::config::get_value<std::string>("host/model");
 449   std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
 450   std::string cpu_model_name     = simgrid::config::get_value<std::string>("cpu/model");
 451   std::string disk_model_name    = simgrid::config::get_value<std::string>("disk/model");
 452
 453   /* The compound host model is needed when using non-default net/cpu models */
 454   if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
 455       simgrid::config::is_default("host/model")) {
 456     host_model_name = "compound";
 457     simgrid::config::set_value("host/model", host_model_name);
 458   }
 459
 460   XBT_DEBUG("host model: %s", host_model_name.c_str());
 461   if (host_model_name == "compound") {
 462     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
 463     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
 464
 465     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
 466     surf_cpu_model_description[cpu_id].model_init_preparse();
 467
 468     int network_id = find_model_description(surf_network_model_description, network_model_name);
 469     surf_network_model_description[network_id].model_init_preparse();
 470   }
 471
 472   XBT_DEBUG("Call host_model_init");
 473   int host_id = find_model_description(surf_host_model_description, host_model_name);
 474   surf_host_model_description[host_id].model_init_preparse();
 475
 476   XBT_DEBUG("Call vm_model_init");
 477   surf_vm_model_init_HL13();
 478
 479   XBT_DEBUG("Call disk_model_init");
 480   int disk_id = find_model_description(surf_disk_model_description, disk_model_name);
 481   surf_disk_model_description[disk_id].model_init_preparse();
 482 }
 483
 484 /**
 485  * @brief Auxiliary function to build the object NetZoneImpl
 486  *
 487  * Builds the objects, setting its father properties and root netzone if needed
 488  * @param zone the parameters defining the Zone to build.
 489  * @return Pointer to recently created netzone
 490  */
 491 static simgrid::kernel::routing::NetZoneImpl*
 492 sg_platf_create_zone(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 493 {
 494   /* search the routing model */
 495   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 496
 497   if (strcasecmp(zone->routing.c_str(), "Cluster") == 0) {
 498     new_zone = new simgrid::kernel::routing::ClusterZone(zone->id);
 499   } else if (strcasecmp(zone->routing.c_str(), "ClusterDragonfly") == 0) {
 500     new_zone = new simgrid::kernel::routing::DragonflyZone(zone->id);
 501   } else if (strcasecmp(zone->routing.c_str(), "ClusterTorus") == 0) {
 502     new_zone = new simgrid::kernel::routing::TorusZone(zone->id);
 503   } else if (strcasecmp(zone->routing.c_str(), "ClusterFatTree") == 0) {
 504     new_zone = new simgrid::kernel::routing::FatTreeZone(zone->id);
 505   } else if (strcasecmp(zone->routing.c_str(), "Dijkstra") == 0) {
 506     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, false);
 507   } else if (strcasecmp(zone->routing.c_str(), "DijkstraCache") == 0) {
 508     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, true);
 509   } else if (strcasecmp(zone->routing.c_str(), "Floyd") == 0) {
 510     new_zone = new simgrid::kernel::routing::FloydZone(zone->id);
 511   } else if (strcasecmp(zone->routing.c_str(), "Full") == 0) {
 512     new_zone = new simgrid::kernel::routing::FullZone(zone->id);
 513   } else if (strcasecmp(zone->routing.c_str(), "None") == 0) {
 514     new_zone = new simgrid::kernel::routing::EmptyZone(zone->id);
 515   } else if (strcasecmp(zone->routing.c_str(), "Vivaldi") == 0) {
 516     new_zone = new simgrid::kernel::routing::VivaldiZone(zone->id);
 517   } else if (strcasecmp(zone->routing.c_str(), "Wifi") == 0) {
 518     new_zone = new simgrid::kernel::routing::WifiZone(zone->id);
 519   } else {
 520     xbt_die("Not a valid model!");
 521   }
 522   new_zone->set_parent(current_routing);
 523
 524   if (current_routing == nullptr) { /* it is the first one */
 525     simgrid::s4u::Engine::get_instance()->set_netzone_root(new_zone->get_iface());
 526   } else {
 527     /* set the father behavior */
 528     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 529       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
 530     /* add to the sons dictionary */
 531     current_routing->add_child(new_zone);
 532     /* set models from parent netzone */
 533     new_zone->set_network_model(current_routing->get_network_model());
 534     new_zone->set_cpu_pm_model(current_routing->get_cpu_pm_model());
 535     new_zone->set_cpu_vm_model(current_routing->get_cpu_vm_model());
 536     new_zone->set_disk_model(current_routing->get_disk_model());
 537     new_zone->set_host_model(current_routing->get_host_model());
 538   }
 539   return new_zone;
 540 }
 541
 542 /**
 543  * @brief Add a Zone to the platform
 544  *
 545  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 546  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 547  *
 548  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 549  *
 550  * @param zone the parameters defining the Zone to build.
 551  */
 552 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_Zone_begin(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 553 {
 554   /* First create the zone.
 555    * This order is important to assure that root netzone is set when models are setting
 556    * the default mode for each resource (CPU, network, etc)
 557    */
 558   auto* new_zone = sg_platf_create_zone(zone);
 559
 560   if (not surf_parse_models_setup_already_called) {
 561     simgrid::s4u::Engine::on_platform_creation();
 562
 563     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 564      * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_connect
 565      *
 566      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 567      * (FIXME: check it out by creating a file beginning with one of these tags)
 568      * but cluster and peer come down to zone creations, so putting this verification here is correct.
 569      */
 570     surf_parse_models_setup_already_called = 1;
 571     surf_config_models_setup();
 572   }
 573
 574   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
 575                             * any further config now that we created some real content */
 576
 577   /* set the new current component of the tree */
 578   current_routing = new_zone;
 579   simgrid::s4u::NetZone::on_creation(*new_zone->get_iface()); // notify the signal
 580
 581   return new_zone;
 582 }
 583
 584 void sg_platf_new_Zone_set_properties(const std::unordered_map<std::string, std::string>* props)
 585 {
 586   xbt_assert(current_routing, "Cannot set properties of the current Zone: none under construction");
 587
 588   if (props)
 589     current_routing->set_properties(*props);
 590 }
 591
 592 /**
 593  * @brief Specify that the description of the current Zone is finished
 594  *
 595  * Once you've declared all the content of your Zone, you have to seal
 596  * it with this call. Your Zone is not usable until you call this function.
 597  */
 598 void sg_platf_new_Zone_seal()
 599 {
 600   xbt_assert(current_routing, "Cannot seal the current Zone: zone under construction");
 601   current_routing->seal();
 602   simgrid::s4u::NetZone::on_seal(*current_routing->get_iface());
 603   current_routing = current_routing->get_parent();
 604 }
 605
 606 /** @brief Add a link connecting a host to the rest of its Zone (which must be cluster or vivaldi) */
 607 void sg_platf_new_hostlink(const simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 608 {
 609   const simgrid::kernel::routing::NetPoint* netpoint = simgrid::s4u::Host::by_name(hostlink->id)->get_netpoint();
 610   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 611   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 612              "Only hosts from Cluster and Vivaldi Zones can get a host_link.");
 613
 614   const simgrid::s4u::Link* linkUp   = simgrid::s4u::Link::by_name_or_null(hostlink->link_up);
 615   const simgrid::s4u::Link* linkDown = simgrid::s4u::Link::by_name_or_null(hostlink->link_down);
 616
 617   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 618   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 619
 620   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 621
 622   if (as_cluster->private_link_exists_at(netpoint->id()))
 623     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
 624
 625   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
 626   as_cluster->add_private_link_at(netpoint->id(), {linkUp->get_impl(), linkDown->get_impl()});
 627 }
 628
 629 void sg_platf_new_trace(simgrid::kernel::routing::ProfileCreationArgs* profile)
 630 {
 631   simgrid::kernel::profile::Profile* mgr_profile;
 632   if (not profile->file.empty()) {
 633     mgr_profile = simgrid::kernel::profile::Profile::from_file(profile->file);
 634   } else {
 635     xbt_assert(not profile->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 636                profile->id.c_str());
 637     mgr_profile = simgrid::kernel::profile::Profile::from_string(profile->id, profile->pc_data, profile->periodicity);
 638   }
 639   traces_set_list.insert({profile->id, mgr_profile});
 640 }