src/kernel/xml/sg_platf.cpp

   1 /* Copyright (c) 2006-2023. 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 /* This file implements the public API to platform parsing                  */
   7
   8 #include <simgrid/Exception.hpp>
   9 #include <simgrid/kernel/routing/DijkstraZone.hpp>
  10 #include <simgrid/kernel/routing/DragonflyZone.hpp>
  11 #include <simgrid/kernel/routing/EmptyZone.hpp>
  12 #include <simgrid/kernel/routing/FatTreeZone.hpp>
  13 #include <simgrid/kernel/routing/FloydZone.hpp>
  14 #include <simgrid/kernel/routing/FullZone.hpp>
  15 #include <simgrid/kernel/routing/NetPoint.hpp>
  16 #include <simgrid/kernel/routing/NetZoneImpl.hpp>
  17 #include <simgrid/kernel/routing/TorusZone.hpp>
  18 #include <simgrid/kernel/routing/VivaldiZone.hpp>
  19 #include <simgrid/kernel/routing/WifiZone.hpp>
  20 #include <simgrid/s4u/Engine.hpp>
  21 #include <simgrid/s4u/NetZone.hpp>
  22
  23 #include "src/kernel/EngineImpl.hpp"
  24 #include "src/kernel/resource/DiskImpl.hpp"
  25 #include "src/kernel/resource/HostImpl.hpp"
  26 #include "src/kernel/resource/profile/Profile.hpp"
  27 #include "src/kernel/xml/platf.hpp"
  28 #include "src/kernel/xml/platf_private.hpp"
  29 #include "src/simgrid/sg_config.hpp"
  30
  31 #include <algorithm>
  32 #include <string>
  33
  34 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(platf_parse);
  35
  36 /* This function acts as a main in the parsing area. */
  37 void parse_platform_file(const std::string& file)
  38 {
  39   /* init the flex parser */
  40   simgrid_parse_open(file);
  41
  42   /* Do the actual parsing */
  43   simgrid_parse();
  44
  45   simgrid_parse_close();
  46 }
  47
  48 namespace simgrid::kernel::routing {
  49 xbt::signal<void(ClusterCreationArgs const&)> on_cluster_creation;
  50 } // namespace simgrid::kernel::routing
  51
  52 static simgrid::kernel::routing::ClusterZoneCreationArgs
  53     zone_cluster; /* temporary store data for irregular clusters, created with <zone routing="Cluster"> */
  54
  55 /** The current NetZone in the parsing */
  56 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  57 static simgrid::s4u::Host* current_host                       = nullptr;
  58
  59 /** Module management function: frees all internal data structures */
  60 void sg_platf_parser_finalize()
  61 {
  62   simgrid::kernel::routing::on_cluster_creation.disconnect_slots();
  63
  64   simgrid_parse_lex_destroy();
  65 }
  66
  67 /** @brief Add a host to the current NetZone */
  68 void sg_platf_new_host_begin(const simgrid::kernel::routing::HostCreationArgs* args)
  69 {
  70   current_host = current_routing->create_host(args->id, args->speed_per_pstate)
  71                      ->set_coordinates(args->coord)
  72                      ->set_core_count(args->core_amount)
  73                      ->set_state_profile(args->state_trace)
  74                      ->set_speed_profile(args->speed_trace);
  75 }
  76
  77 void sg_platf_new_host_set_properties(const std::unordered_map<std::string, std::string>& props)
  78 {
  79   xbt_assert(current_host, "Cannot set properties of the current host: none under construction");
  80   current_host->set_properties(props);
  81 }
  82
  83 void sg_platf_new_host_seal(int pstate)
  84 {
  85   xbt_assert(current_host, "Cannot seal the current Host: none under construction");
  86   current_host->seal();
  87
  88   /* When energy plugin is activated, changing the pstate requires to already have the HostEnergy extension whose
  89    * allocation is triggered by the on_creation signal. Then set_pstate must be called after the signal emission */
  90
  91   if (pstate != 0)
  92     current_host->set_pstate(pstate);
  93
  94   current_host = nullptr;
  95 }
  96
  97 void sg_platf_new_peer(const simgrid::kernel::routing::PeerCreationArgs* args)
  98 {
  99   auto* zone = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 100   xbt_assert(zone, "<peer> tag can only be used in Vivaldi netzones.");
 101
 102   const auto* peer = zone->create_host(args->id, {args->speed})
 103                          ->set_state_profile(args->state_trace)
 104                          ->set_speed_profile(args->speed_trace)
 105                          ->set_coordinates(args->coord)
 106                          ->seal();
 107
 108   zone->set_peer_link(peer->get_netpoint(), args->bw_in, args->bw_out);
 109 }
 110
 111 /** @brief Add a "router" to the network element list */
 112 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const std::string& name, const std::string& coords)
 113 {
 114   auto* netpoint = current_routing->create_router(name)->set_coordinates(coords);
 115   XBT_DEBUG("Router '%s' has the id %lu", netpoint->get_cname(), netpoint->id());
 116
 117   return netpoint;
 118 }
 119
 120 void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* args)
 121 {
 122   simgrid::s4u::Link* link;
 123   if (args->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 124     link = current_routing->create_split_duplex_link(args->id, args->bandwidths);
 125   } else {
 126     link = current_routing->create_link(args->id, args->bandwidths);
 127     link->get_impl()->set_sharing_policy(args->policy, {});
 128   }
 129
 130   link->set_properties(args->properties)
 131       ->set_state_profile(args->state_trace)
 132       ->set_latency_profile(args->latency_trace)
 133       ->set_bandwidth_profile(args->bandwidth_trace)
 134       ->set_latency(args->latency);
 135
 136   link->seal();
 137 }
 138
 139 void sg_platf_new_disk(const simgrid::kernel::routing::DiskCreationArgs* disk)
 140 {
 141   const simgrid::s4u::Disk* new_disk = current_routing->create_disk(disk->id, disk->read_bw, disk->write_bw)
 142                                            ->set_host(current_host)
 143                                            ->set_properties(disk->properties)
 144                                            ->seal();
 145
 146   current_host->add_disk(new_disk);
 147 }
 148
 149 /*************************************************************************************************/
 150 /** @brief Auxiliary function to create hosts */
 151 static std::pair<simgrid::kernel::routing::NetPoint*, simgrid::kernel::routing::NetPoint*>
 152 sg_platf_cluster_create_host(const simgrid::kernel::routing::ClusterCreationArgs* cluster, simgrid::s4u::NetZone* zone,
 153                              const std::vector<unsigned long>& /*coord*/, unsigned long id)
 154 {
 155   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 156              "Zone(%s): error when creating host number %lu in the zone. Insufficient number of radicals available "
 157              "(total = %zu). Check the 'radical' parameter in XML",
 158              cluster->id.c_str(), id, cluster->radicals.size());
 159
 160   std::string host_id = cluster->prefix + std::to_string(cluster->radicals[id]) + cluster->suffix;
 161   XBT_DEBUG("Cluster: creating host=%s speed=%f", host_id.c_str(), cluster->speeds.front());
 162   const simgrid::s4u::Host* host = zone->create_host(host_id, cluster->speeds)
 163                                        ->set_core_count(cluster->core_amount)
 164                                        ->set_properties(cluster->properties)
 165                                        ->seal();
 166   return std::make_pair(host->get_netpoint(), nullptr);
 167 }
 168
 169 /** @brief Auxiliary function to create loopback links */
 170 static simgrid::s4u::Link*
 171 sg_platf_cluster_create_loopback(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 172                                  simgrid::s4u::NetZone* zone, const std::vector<unsigned long>& /*coord*/,
 173                                  unsigned long id)
 174 {
 175   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 176              "Zone(%s): error when creating loopback for host number %lu in the zone. Insufficient number of "
 177              "radicals available "
 178              "(total = %zu). Check the 'radical' parameter in XML",
 179              cluster->id.c_str(), id, cluster->radicals.size());
 180
 181   std::string link_id = cluster->id + "_link_" + std::to_string(cluster->radicals[id]) + "_loopback";
 182   XBT_DEBUG("Cluster: creating loopback link=%s bw=%f", link_id.c_str(), cluster->loopback_bw);
 183
 184   simgrid::s4u::Link* loopback = zone->create_link(link_id, cluster->loopback_bw)
 185                                      ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 186                                      ->set_latency(cluster->loopback_lat)
 187                                      ->seal();
 188   return loopback;
 189 }
 190
 191 /** @brief Auxiliary function to create limiter links */
 192 static simgrid::s4u::Link* sg_platf_cluster_create_limiter(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 193                                                            simgrid::s4u::NetZone* zone,
 194                                                            const std::vector<unsigned long>& /*coord*/,
 195                                                            unsigned long id)
 196 {
 197   std::string link_id = cluster->id + "_link_" + std::to_string(id) + "_limiter";
 198   XBT_DEBUG("Cluster: creating limiter link=%s bw=%f", link_id.c_str(), cluster->limiter_link);
 199
 200   simgrid::s4u::Link* limiter = zone->create_link(link_id, cluster->limiter_link)->seal();
 201   return limiter;
 202 }
 203
 204 /** @brief Create Torus, Fat-Tree and Dragonfly clusters */
 205 static void sg_platf_new_cluster_hierarchical(const simgrid::kernel::routing::ClusterCreationArgs* cluster)
 206 {
 207   using namespace std::placeholders;
 208   using simgrid::kernel::routing::DragonflyZone;
 209   using simgrid::kernel::routing::FatTreeZone;
 210   using simgrid::kernel::routing::TorusZone;
 211
 212   auto set_host = std::bind(sg_platf_cluster_create_host, cluster, _1, _2, _3);
 213   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_loopback{};
 214   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_limiter{};
 215
 216   if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 217     set_loopback = std::bind(sg_platf_cluster_create_loopback, cluster, _1, _2, _3);
 218   }
 219
 220   if (cluster->limiter_link > 0) {
 221     set_limiter = std::bind(sg_platf_cluster_create_limiter, cluster, _1, _2, _3);
 222   }
 223
 224   simgrid::s4u::NetZone const* parent = current_routing ? current_routing->get_iface() : nullptr;
 225   switch (cluster->topology) {
 226     case simgrid::kernel::routing::ClusterTopology::TORUS:
 227       simgrid::s4u::create_torus_zone(cluster->id, parent, TorusZone::parse_topo_parameters(cluster->topo_parameters),
 228                                       {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat,
 229                                       cluster->sharing_policy);
 230       break;
 231     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 232       simgrid::s4u::create_dragonfly_zone(
 233           cluster->id, parent, DragonflyZone::parse_topo_parameters(cluster->topo_parameters),
 234           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 235       break;
 236     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 237       simgrid::s4u::create_fatTree_zone(
 238           cluster->id, parent, FatTreeZone::parse_topo_parameters(cluster->topo_parameters),
 239           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 240       break;
 241     default:
 242       THROW_IMPOSSIBLE;
 243   }
 244 }
 245
 246 /*************************************************************************************************/
 247 /** @brief Create regular Cluster */
 248 static void sg_platf_new_cluster_flat(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 249 {
 250   auto* zone = simgrid::s4u::create_star_zone(cluster->id);
 251   if (const auto* parent = current_routing ? current_routing->get_iface() : nullptr)
 252     zone->set_parent(parent);
 253
 254   /* set properties */
 255   for (auto const& [key, value] : cluster->properties)
 256     zone->set_property(key, value);
 257
 258   /* Make the backbone */
 259   const simgrid::s4u::Link* backbone = nullptr;
 260   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 261     std::string bb_name = cluster->id + "_backbone";
 262     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/> <!--backbone -->", bb_name.c_str(), cluster->bb_bw,
 263               cluster->bb_lat);
 264
 265     backbone = zone->create_link(bb_name, cluster->bb_bw)
 266                    ->set_sharing_policy(cluster->bb_sharing_policy)
 267                    ->set_latency(cluster->bb_lat)
 268                    ->seal();
 269   }
 270
 271   for (int const& i : cluster->radicals) {
 272     std::string host_id = cluster->prefix + std::to_string(i) + cluster->suffix;
 273
 274     XBT_DEBUG("<host\tid=\"%s\"\tspeed=\"%f\">", host_id.c_str(), cluster->speeds.front());
 275     const auto* host = zone->create_host(host_id, cluster->speeds)
 276                            ->set_core_count(cluster->core_amount)
 277                            ->set_properties(cluster->properties)
 278                            ->seal();
 279
 280     XBT_DEBUG("</host>");
 281
 282     std::string link_id = cluster->id + "_link_" + std::to_string(i);
 283     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 284
 285     // add a loopback link
 286     if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 287       std::string loopback_name = link_id + "_loopback";
 288       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", loopback_name.c_str(), cluster->loopback_bw);
 289
 290       const auto* loopback = zone->create_link(loopback_name, cluster->loopback_bw)
 291                                  ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 292                                  ->set_latency(cluster->loopback_lat)
 293                                  ->seal();
 294
 295       zone->add_route(host->get_netpoint(), host->get_netpoint(), nullptr, nullptr,
 296                       {simgrid::s4u::LinkInRoute(loopback)});
 297     }
 298
 299     // add a limiter link (shared link to account for maximal bandwidth of the node)
 300     const simgrid::s4u::Link* limiter = nullptr;
 301     if (cluster->limiter_link > 0) {
 302       std::string limiter_name = link_id + "_limiter";
 303       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", limiter_name.c_str(), cluster->limiter_link);
 304
 305       limiter = zone->create_link(limiter_name, cluster->limiter_link)->seal();
 306     }
 307
 308     // create link
 309     const simgrid::s4u::Link* link;
 310     if (cluster->sharing_policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 311       link = zone->create_split_duplex_link(link_id, cluster->bw)->set_latency(cluster->lat)->seal();
 312     } else {
 313       link = zone->create_link(link_id, cluster->bw)->set_latency(cluster->lat)->seal();
 314     }
 315
 316     /* adding routes */
 317     std::vector<simgrid::s4u::LinkInRoute> links;
 318     if (limiter)
 319       links.emplace_back(limiter);
 320     links.emplace_back(link, simgrid::s4u::LinkInRoute::Direction::UP);
 321     if (backbone)
 322       links.emplace_back(backbone);
 323
 324     zone->add_route(host->get_netpoint(), nullptr, nullptr, nullptr, links, true);
 325   }
 326
 327   // Add a router.
 328   XBT_DEBUG(" ");
 329   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 330   if (cluster->router_id.empty())
 331     cluster->router_id = cluster->prefix + cluster->id + "_router" + cluster->suffix;
 332   auto* router = zone->create_router(cluster->router_id);
 333   zone->add_route(router, nullptr, nullptr, nullptr, {});
 334
 335   simgrid::kernel::routing::on_cluster_creation(*cluster);
 336 }
 337
 338 void sg_platf_new_tag_cluster(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 339 {
 340   switch (cluster->topology) {
 341     case simgrid::kernel::routing::ClusterTopology::TORUS:
 342     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 343     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 344       sg_platf_new_cluster_hierarchical(cluster);
 345       break;
 346     default:
 347       sg_platf_new_cluster_flat(cluster);
 348       break;
 349   }
 350 }
 351 /*************************************************************************************************/
 352 /** @brief Set the links for internal node inside a Cluster(Star) */
 353 static void sg_platf_cluster_set_hostlink(simgrid::kernel::routing::StarZone* zone,
 354                                           simgrid::kernel::routing::NetPoint* netpoint,
 355                                           const simgrid::s4u::Link* link_up, const simgrid::s4u::Link* link_down,
 356                                           const simgrid::s4u::Link* backbone)
 357 {
 358   XBT_DEBUG("Push Host_link for host '%s' to position %lu", netpoint->get_cname(), netpoint->id());
 359   simgrid::s4u::LinkInRoute linkUp{link_up};
 360   simgrid::s4u::LinkInRoute linkDown{link_down};
 361   if (backbone) {
 362     simgrid::s4u::LinkInRoute linkBB{backbone};
 363     zone->add_route(netpoint, nullptr, nullptr, nullptr, {linkUp, linkBB}, false);
 364     zone->add_route(nullptr, netpoint, nullptr, nullptr, {linkBB, linkDown}, false);
 365   } else {
 366     zone->add_route(netpoint, nullptr, nullptr, nullptr, {linkUp}, false);
 367     zone->add_route(nullptr, netpoint, nullptr, nullptr, {linkDown}, false);
 368   }
 369 }
 370
 371 /** @brief Add a link connecting a host to the rest of its StarZone */
 372 static void sg_platf_build_hostlink(simgrid::kernel::routing::StarZone* zone,
 373                                     const simgrid::kernel::routing::HostLinkCreationArgs* hostlink,
 374                                     const simgrid::s4u::Link* backbone)
 375 {
 376   const auto engine = simgrid::s4u::Engine::get_instance();
 377   auto netpoint     = engine->host_by_name(hostlink->id)->get_netpoint();
 378   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 379
 380   const auto linkUp   = engine->link_by_name_or_null(hostlink->link_up);
 381   const auto linkDown = engine->link_by_name_or_null(hostlink->link_down);
 382
 383   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 384   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 385   sg_platf_cluster_set_hostlink(zone, netpoint, linkUp, linkDown, backbone);
 386 }
 387
 388 /** @brief Create a cabinet (set of hosts) inside a Cluster(StarZone) */
 389 static void sg_platf_build_cabinet(simgrid::kernel::routing::StarZone* zone,
 390                                    const simgrid::kernel::routing::CabinetCreationArgs* args,
 391                                    const simgrid::s4u::Link* backbone)
 392 {
 393   for (int const& radical : args->radicals) {
 394     std::string id   = args->prefix + std::to_string(radical) + args->suffix;
 395     auto const* host = zone->create_host(id, {args->speed})->seal();
 396
 397     const auto* link_up   = zone->create_link("link_" + id + "_UP", {args->bw})->set_latency(args->lat)->seal();
 398     const auto* link_down = zone->create_link("link_" + id + "_DOWN", {args->bw})->set_latency(args->lat)->seal();
 399
 400     sg_platf_cluster_set_hostlink(zone, host->get_netpoint(), link_up, link_down, backbone);
 401   }
 402 }
 403
 404 static void sg_platf_zone_cluster_populate(const simgrid::kernel::routing::ClusterZoneCreationArgs* cluster)
 405 {
 406   auto* zone = dynamic_cast<simgrid::kernel::routing::StarZone*>(current_routing);
 407   xbt_assert(zone, "Host_links are only valid for Cluster(Star)");
 408
 409   const simgrid::s4u::Link* backbone = nullptr;
 410   /* create backbone */
 411   if (cluster->backbone) {
 412     sg_platf_new_link(cluster->backbone.get());
 413     backbone = simgrid::s4u::Link::by_name(cluster->backbone->id);
 414   }
 415
 416   /* create host_links for hosts */
 417   for (auto const& hostlink : cluster->host_links) {
 418     sg_platf_build_hostlink(zone, &hostlink, backbone);
 419   }
 420
 421   /* create cabinets */
 422   for (auto const& cabinet : cluster->cabinets) {
 423     sg_platf_build_cabinet(zone, &cabinet, backbone);
 424   }
 425 }
 426
 427 void routing_cluster_add_backbone(std::unique_ptr<simgrid::kernel::routing::LinkCreationArgs> link)
 428 {
 429   zone_cluster.backbone = std::move(link);
 430 }
 431
 432 void sg_platf_new_cabinet(const simgrid::kernel::routing::CabinetCreationArgs* args)
 433 {
 434   xbt_assert(args, "Invalid nullptr argument");
 435   zone_cluster.cabinets.emplace_back(*args);
 436 }
 437
 438 /*************************************************************************************************/
 439 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 440 {
 441   current_routing->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 442                              route->symmetrical);
 443 }
 444
 445 void sg_platf_new_bypass_route(simgrid::kernel::routing::RouteCreationArgs* route)
 446 {
 447   current_routing->add_bypass_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list);
 448 }
 449
 450 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 451 {
 452   const auto* engine = simgrid::s4u::Engine::get_instance();
 453   sg_host_t host     = sg_host_by_name(actor->host);
 454   if (not host) {
 455     // The requested host does not exist. Do a nice message to the user
 456     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 457                       "' does not exist\nExisting hosts: '";
 458
 459     std::vector<simgrid::s4u::Host*> list = engine->get_all_hosts();
 460
 461     for (auto const& some_host : list) {
 462       msg += some_host->get_name();
 463       msg += "', '";
 464       if (msg.length() > 1024) {
 465         msg.pop_back(); // remove trailing quote
 466         msg += "...(list truncated)......";
 467         break;
 468       }
 469     }
 470     xbt_die("%s", msg.c_str());
 471   }
 472   const simgrid::kernel::actor::ActorCodeFactory& factory = engine->get_impl()->get_function(actor->function);
 473   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
 474
 475   double start_time = actor->start_time;
 476   double kill_time  = actor->kill_time;
 477   bool auto_restart = actor->restart_on_failure;
 478
 479   std::string actor_name                 = actor->args[0];
 480   simgrid::kernel::actor::ActorCode code = factory(std::move(actor->args));
 481
 482   auto* arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 483                                                      auto_restart, /*daemon=*/false, /*restart_count=*/0);
 484
 485   host->get_impl()->add_actor_at_boot(arg);
 486
 487   if (start_time > simgrid::s4u::Engine::get_clock()) {
 488     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 489                                                  auto_restart, /*daemon=*/false, /*restart_count=*/0);
 490
 491     XBT_DEBUG("Actor %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 492     simgrid::kernel::timer::Timer::set(start_time, [arg]() {
 493       simgrid::kernel::actor::ActorImplPtr new_actor = simgrid::kernel::actor::ActorImpl::create(arg);
 494       delete arg;
 495     });
 496   } else { // start_time <= simgrid::s4u::Engine::get_clock()
 497     XBT_DEBUG("Starting actor %s(%s) right now", arg->name.c_str(), host->get_cname());
 498
 499     try {
 500       simgrid::kernel::actor::ActorImplPtr new_actor = simgrid::kernel::actor::ActorImpl::create(arg);
 501     } catch (simgrid::HostFailureException const&) {
 502       XBT_WARN("Starting actor %s(%s) failed because its host is turned off.", arg->name.c_str(), host->get_cname());
 503     }
 504   }
 505 }
 506
 507 /**
 508  * @brief Auxiliary function to build the object NetZoneImpl
 509  *
 510  * Builds the objects, setting its parent properties and root netzone if needed
 511  * @param zone the parameters defining the Zone to build.
 512  * @return Pointer to recently created netzone
 513  */
 514 static simgrid::kernel::routing::NetZoneImpl*
 515 sg_platf_create_zone(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 516 {
 517   /* search the routing model */
 518   const simgrid::s4u::NetZone* new_zone = nullptr;
 519
 520   if (strcasecmp(zone->routing.c_str(), "Cluster") == 0) {
 521     new_zone = simgrid::s4u::create_star_zone(zone->id);
 522   } else if (strcasecmp(zone->routing.c_str(), "Dijkstra") == 0) {
 523     new_zone = simgrid::s4u::create_dijkstra_zone(zone->id, false);
 524   } else if (strcasecmp(zone->routing.c_str(), "DijkstraCache") == 0) {
 525     new_zone = simgrid::s4u::create_dijkstra_zone(zone->id, true);
 526   } else if (strcasecmp(zone->routing.c_str(), "Floyd") == 0) {
 527     new_zone = simgrid::s4u::create_floyd_zone(zone->id);
 528   } else if (strcasecmp(zone->routing.c_str(), "Full") == 0) {
 529     new_zone = simgrid::s4u::create_full_zone(zone->id);
 530   } else if (strcasecmp(zone->routing.c_str(), "None") == 0) {
 531     new_zone = simgrid::s4u::create_empty_zone(zone->id);
 532   } else if (strcasecmp(zone->routing.c_str(), "Vivaldi") == 0) {
 533     new_zone = simgrid::s4u::create_vivaldi_zone(zone->id);
 534   } else if (strcasecmp(zone->routing.c_str(), "Wifi") == 0) {
 535     new_zone = simgrid::s4u::create_wifi_zone(zone->id);
 536   } else {
 537     xbt_die("Not a valid model!");
 538   }
 539
 540   simgrid::kernel::routing::NetZoneImpl* new_zone_impl = new_zone->get_impl();
 541   new_zone_impl->set_parent(current_routing);
 542
 543   return new_zone_impl;
 544 }
 545
 546 /**
 547  * @brief Add a Zone to the platform
 548  *
 549  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 550  * and before the corresponding call to sg_platf_new_zone_seal() will be added to this Zone.
 551  *
 552  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 553  *
 554  * @param zone the parameters defining the Zone to build.
 555  */
 556 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_zone_begin(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 557 {
 558   zone_cluster.routing = zone->routing;
 559   current_routing      = sg_platf_create_zone(zone);
 560
 561   return current_routing;
 562 }
 563
 564 void sg_platf_new_zone_set_properties(const std::unordered_map<std::string, std::string>& props)
 565 {
 566   xbt_assert(current_routing, "Cannot set properties of the current Zone: none under construction");
 567
 568   current_routing->set_properties(props);
 569 }
 570
 571 /**
 572  * @brief Specify that the description of the current Zone is finished
 573  *
 574  * Once you've declared all the content of your Zone, you have to seal
 575  * it with this call. Your Zone is not usable until you call this function.
 576  */
 577 void sg_platf_new_zone_seal()
 578 {
 579   xbt_assert(current_routing, "Cannot seal the current Zone: none under construction");
 580   if (strcasecmp(zone_cluster.routing.c_str(), "Cluster") == 0) {
 581     sg_platf_zone_cluster_populate(&zone_cluster);
 582     zone_cluster.routing = "";
 583     zone_cluster.host_links.clear();
 584     zone_cluster.cabinets.clear();
 585     zone_cluster.backbone.reset();
 586   }
 587   current_routing = current_routing->get_parent();
 588 }
 589
 590 /** @brief Add a link connecting a host to the rest of its Zone (which must be cluster or vivaldi) */
 591 void sg_platf_new_hostlink(const simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 592 {
 593   xbt_assert(hostlink, "Invalid nullptr parameter");
 594   zone_cluster.host_links.emplace_back(*hostlink);
 595 }
 596
 597 void sg_platf_new_trace(const simgrid::kernel::routing::ProfileCreationArgs* args)
 598 {
 599   simgrid::kernel::profile::Profile* profile;
 600   if (not args->file.empty()) {
 601     profile = simgrid::kernel::profile::ProfileBuilder::from_file(args->file);
 602   } else {
 603     xbt_assert(not args->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 604                args->id.c_str());
 605     profile = simgrid::kernel::profile::ProfileBuilder::from_string(args->id, args->pc_data, args->periodicity);
 606   }
 607   traces_set_list.try_emplace(args->id, profile);
 608 }