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/DijkstraZone.hpp"
   8 #include "simgrid/kernel/routing/DragonflyZone.hpp"
   9 #include "simgrid/kernel/routing/EmptyZone.hpp"
  10 #include "simgrid/kernel/routing/FatTreeZone.hpp"
  11 #include "simgrid/kernel/routing/FloydZone.hpp"
  12 #include "simgrid/kernel/routing/FullZone.hpp"
  13 #include "simgrid/kernel/routing/NetPoint.hpp"
  14 #include "simgrid/kernel/routing/NetZoneImpl.hpp"
  15 #include "simgrid/kernel/routing/TorusZone.hpp"
  16 #include "simgrid/kernel/routing/VivaldiZone.hpp"
  17 #include "simgrid/kernel/routing/WifiZone.hpp"
  18 #include "simgrid/s4u/Engine.hpp"
  19 #include "src/include/simgrid/sg_config.hpp"
  20 #include "src/include/surf/surf.hpp"
  21 #include "src/kernel/EngineImpl.hpp"
  22 #include "src/kernel/resource/DiskImpl.hpp"
  23 #include "src/kernel/resource/profile/Profile.hpp"
  24 #include "src/simix/smx_private.hpp"
  25 #include "src/surf/HostImpl.hpp"
  26 #include "src/surf/xml/platf_private.hpp"
  27
  28 #include <algorithm>
  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 simgrid::kernel::routing::ClusterZoneCreationArgs
  42     zone_cluster; /* temporary store data for irregular clusters, created with <zone routing="Cluster"> */
  43
  44 /** The current NetZone in the parsing */
  45 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  46 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  47 {
  48   return current_routing;
  49 }
  50 static simgrid::s4u::Host* current_host = nullptr;
  51
  52 /** Module management function: creates all internal data structures */
  53 void sg_platf_init()
  54 {
  55   // Do nothing: just for symmetry of user code
  56 }
  57
  58 /** Module management function: frees all internal data structures */
  59 void sg_platf_exit()
  60 {
  61   simgrid::kernel::routing::on_cluster_creation.disconnect_slots();
  62   simgrid::s4u::Engine::on_platform_created.disconnect_slots();
  63
  64   surf_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 = routing_get_current()
  71                      ->create_host(args->id, args->speed_per_pstate)
  72                      ->set_coordinates(args->coord)
  73                      ->set_core_count(args->core_amount)
  74                      ->set_state_profile(args->state_trace)
  75                      ->set_speed_profile(args->speed_trace);
  76 }
  77
  78 void sg_platf_new_host_set_properties(const std::unordered_map<std::string, std::string>& props)
  79 {
  80   xbt_assert(current_host, "Cannot set properties of the current host: none under construction");
  81   current_host->set_properties(props);
  82 }
  83
  84 void sg_platf_new_host_seal(int pstate)
  85 {
  86   xbt_assert(current_host, "Cannot seal the current Host: none under construction");
  87   current_host->seal();
  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 emission */
  91
  92   if (pstate != 0)
  93     current_host->set_pstate(pstate);
  94
  95   current_host = nullptr;
  96 }
  97
  98 void sg_platf_new_peer(const simgrid::kernel::routing::PeerCreationArgs* args)
  99 {
 100   auto* zone = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 101   xbt_assert(zone, "<peer> tag can only be used in Vivaldi netzones.");
 102
 103   const auto* peer = zone->create_host(args->id, std::vector<double>{args->speed})
 104                          ->set_state_profile(args->state_trace)
 105                          ->set_speed_profile(args->speed_trace)
 106                          ->set_coordinates(args->coord)
 107                          ->seal();
 108
 109   zone->set_peer_link(peer->get_netpoint(), args->bw_in, args->bw_out);
 110 }
 111
 112 /** @brief Add a "router" to the network element list */
 113 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const std::string& name, const std::string& coords)
 114 {
 115   auto* netpoint = current_routing->create_router(name)->set_coordinates(coords);
 116   XBT_DEBUG("Router '%s' has the id %u", netpoint->get_cname(), netpoint->id());
 117
 118   return netpoint;
 119 }
 120
 121 static void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* args, const std::string& link_name)
 122 {
 123   routing_get_current()
 124       ->create_link(link_name, args->bandwidths)
 125       ->set_properties(args->properties)
 126       ->get_impl() // this call to get_impl saves some simcalls but can be removed
 127       ->set_sharing_policy(args->policy)
 128       ->set_state_profile(args->state_trace)
 129       ->set_latency_profile(args->latency_trace)
 130       ->set_bandwidth_profile(args->bandwidth_trace)
 131       ->set_latency(args->latency)
 132       ->seal();
 133 }
 134
 135 void sg_platf_new_link(const simgrid::kernel::routing::LinkCreationArgs* link)
 136 {
 137   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 138     sg_platf_new_link(link, link->id + "_UP");
 139     sg_platf_new_link(link, link->id + "_DOWN");
 140   } else {
 141     sg_platf_new_link(link, link->id);
 142   }
 143 }
 144
 145 void sg_platf_new_disk(const simgrid::kernel::routing::DiskCreationArgs* disk)
 146 {
 147   const simgrid::s4u::Disk* new_disk = routing_get_current()
 148                                            ->create_disk(disk->id, disk->read_bw, disk->write_bw)
 149                                            ->set_host(current_host)
 150                                            ->set_properties(disk->properties)
 151                                            ->seal();
 152
 153   current_host->add_disk(new_disk);
 154 }
 155
 156 /*************************************************************************************************/
 157 /** @brief Auxiliary function to create hosts */
 158 static std::pair<simgrid::kernel::routing::NetPoint*, simgrid::kernel::routing::NetPoint*>
 159 sg_platf_cluster_create_host(const simgrid::kernel::routing::ClusterCreationArgs* cluster, simgrid::s4u::NetZone* zone,
 160                              const std::vector<unsigned int>& /*coord*/, int id)
 161 {
 162   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 163              "Zone(%s): error when creating host number %d in the zone. Insufficient number of radicals available "
 164              "(total = %zu). Check the 'radical' parameter in XML",
 165              cluster->id.c_str(), id, cluster->radicals.size());
 166
 167   std::string host_id = std::string(cluster->prefix) + std::to_string(cluster->radicals[id]) + cluster->suffix;
 168   XBT_DEBUG("Cluster: creating host=%s speed=%f", host_id.c_str(), cluster->speeds.front());
 169   const simgrid::s4u::Host* host = zone->create_host(host_id, cluster->speeds)
 170                                        ->set_core_count(cluster->core_amount)
 171                                        ->set_properties(cluster->properties)
 172                                        ->seal();
 173   return std::make_pair(host->get_netpoint(), nullptr);
 174 }
 175
 176 /** @brief Auxiliary function to create loopback links */
 177 static simgrid::s4u::Link*
 178 sg_platf_cluster_create_loopback(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 179                                  simgrid::s4u::NetZone* zone, const std::vector<unsigned int>& /*coord*/, int id)
 180 {
 181   xbt_assert(static_cast<unsigned long>(id) < cluster->radicals.size(),
 182              "Zone(%s): error when creating loopback for host number %d in the zone. Insufficient number of radicals "
 183              "available "
 184              "(total = %zu). Check the 'radical' parameter in XML",
 185              cluster->id.c_str(), id, cluster->radicals.size());
 186
 187   std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(cluster->radicals[id]) + "_loopback";
 188   XBT_DEBUG("Cluster: creating loopback link=%s bw=%f", link_id.c_str(), cluster->loopback_bw);
 189
 190   simgrid::s4u::Link* loopback = zone->create_link(link_id, cluster->loopback_bw)
 191                                      ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 192                                      ->set_latency(cluster->loopback_lat)
 193                                      ->seal();
 194   return loopback;
 195 }
 196
 197 /** @brief Auxiliary function to create limiter links */
 198 static simgrid::s4u::Link* sg_platf_cluster_create_limiter(const simgrid::kernel::routing::ClusterCreationArgs* cluster,
 199                                                            simgrid::s4u::NetZone* zone,
 200                                                            const std::vector<unsigned int>& /*coord*/, int id)
 201 {
 202   std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(id) + "_limiter";
 203   XBT_DEBUG("Cluster: creating limiter link=%s bw=%f", link_id.c_str(), cluster->limiter_link);
 204
 205   simgrid::s4u::Link* limiter = zone->create_link(link_id, cluster->limiter_link)->seal();
 206   return limiter;
 207 }
 208
 209 /** @brief Create Torus, Fat-Tree and Dragonfly clusters */
 210 static void sg_platf_new_cluster_hierarchical(const simgrid::kernel::routing::ClusterCreationArgs* cluster)
 211 {
 212   using namespace std::placeholders;
 213   using simgrid::kernel::routing::DragonflyZone;
 214   using simgrid::kernel::routing::FatTreeZone;
 215   using simgrid::kernel::routing::TorusZone;
 216
 217   auto set_host = std::bind(sg_platf_cluster_create_host, cluster, _1, _2, _3);
 218   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_loopback{};
 219   std::function<simgrid::s4u::ClusterCallbacks::ClusterLinkCb> set_limiter{};
 220
 221   if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 222     set_loopback = std::bind(sg_platf_cluster_create_loopback, cluster, _1, _2, _3);
 223   }
 224
 225   if (cluster->limiter_link > 0) {
 226     set_limiter = std::bind(sg_platf_cluster_create_limiter, cluster, _1, _2, _3);
 227   }
 228
 229   simgrid::s4u::NetZone const* parent = routing_get_current() ? routing_get_current()->get_iface() : nullptr;
 230   simgrid::s4u::NetZone* zone;
 231   switch (cluster->topology) {
 232     case simgrid::kernel::routing::ClusterTopology::TORUS:
 233       zone = simgrid::s4u::create_torus_zone(
 234           cluster->id, parent, TorusZone::parse_topo_parameters(cluster->topo_parameters),
 235           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 236       break;
 237     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 238       zone = simgrid::s4u::create_dragonfly_zone(
 239           cluster->id, parent, DragonflyZone::parse_topo_parameters(cluster->topo_parameters),
 240           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 241       break;
 242     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 243       zone = simgrid::s4u::create_fatTree_zone(
 244           cluster->id, parent, FatTreeZone::parse_topo_parameters(cluster->topo_parameters),
 245           {set_host, set_loopback, set_limiter}, cluster->bw, cluster->lat, cluster->sharing_policy);
 246       break;
 247     default:
 248       THROW_IMPOSSIBLE;
 249   }
 250   zone->seal();
 251 }
 252
 253 /*************************************************************************************************/
 254 /** @brief Create regular Cluster */
 255 static void sg_platf_new_cluster_flat(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 256 {
 257   auto* zone                          = simgrid::s4u::create_star_zone(cluster->id);
 258   simgrid::s4u::NetZone const* parent = routing_get_current() ? routing_get_current()->get_iface() : nullptr;
 259   if (parent)
 260     zone->set_parent(parent);
 261
 262   /* set properties */
 263   for (auto const& elm : cluster->properties)
 264     zone->set_property(elm.first, elm.second);
 265
 266   /* Make the backbone */
 267   simgrid::s4u::Link* backbone = nullptr;
 268   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 269     std::string bb_name = std::string(cluster->id) + "_backbone";
 270     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/> <!--backbone -->", bb_name.c_str(), cluster->bb_bw,
 271               cluster->bb_lat);
 272
 273     backbone = zone->create_link(bb_name, std::vector<double>{cluster->bb_bw})
 274                    ->set_sharing_policy(cluster->bb_sharing_policy)
 275                    ->set_latency(cluster->bb_lat)
 276                    ->seal();
 277   }
 278
 279   for (int const& i : cluster->radicals) {
 280     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 281
 282     XBT_DEBUG("<host\tid=\"%s\"\tspeed=\"%f\">", host_id.c_str(), cluster->speeds.front());
 283     const auto* host = zone->create_host(host_id, cluster->speeds)
 284                            ->set_core_count(cluster->core_amount)
 285                            ->set_properties(cluster->properties)
 286                            ->seal();
 287
 288     XBT_DEBUG("</host>");
 289
 290     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 291     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 292
 293     // add a loopback link
 294     if (cluster->loopback_bw > 0 || cluster->loopback_lat > 0) {
 295       std::string loopback_name = link_id + "_loopback";
 296       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", loopback_name.c_str(), cluster->loopback_bw);
 297
 298       auto* loopback = zone->create_link(loopback_name, std::vector<double>{cluster->loopback_bw})
 299                            ->set_sharing_policy(simgrid::s4u::Link::SharingPolicy::FATPIPE)
 300                            ->set_latency(cluster->loopback_lat)
 301                            ->seal();
 302
 303       zone->add_route(host->get_netpoint(), host->get_netpoint(), nullptr, nullptr,
 304                       std::vector<simgrid::s4u::Link*>{loopback});
 305     }
 306
 307     // add a limiter link (shared link to account for maximal bandwidth of the node)
 308     simgrid::s4u::Link* limiter = nullptr;
 309     if (cluster->limiter_link > 0) {
 310       std::string limiter_name = std::string(link_id) + "_limiter";
 311       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", limiter_name.c_str(), cluster->limiter_link);
 312
 313       limiter = zone->create_link(limiter_name, std::vector<double>{cluster->limiter_link})->seal();
 314     }
 315
 316     // create link
 317     simgrid::s4u::Link* link_up;
 318     simgrid::s4u::Link* link_down;
 319     if (cluster->sharing_policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 320       link_up = zone->create_link(link_id + "_UP", std::vector<double>{cluster->bw})->set_latency(cluster->lat)->seal();
 321       link_down =
 322           zone->create_link(link_id + "_DOWN", std::vector<double>{cluster->bw})->set_latency(cluster->lat)->seal();
 323     } else {
 324       link_up   = zone->create_link(link_id, std::vector<double>{cluster->bw})->set_latency(cluster->lat)->seal();
 325       link_down = link_up;
 326     }
 327
 328     /* adding routes */
 329     std::vector<simgrid::s4u::Link*> links_up{limiter, link_up, backbone};
 330     std::vector<simgrid::s4u::Link*> links_down{backbone, link_down, limiter};
 331     links_up.erase(std::remove(links_up.begin(), links_up.end(), nullptr), links_up.end());
 332     links_down.erase(std::remove(links_down.begin(), links_down.end(), nullptr), links_down.end());
 333
 334     zone->add_route(host->get_netpoint(), nullptr, nullptr, nullptr, links_up, false);
 335     zone->add_route(nullptr, host->get_netpoint(), nullptr, nullptr, links_down, false);
 336   }
 337
 338   // Add a router.
 339   XBT_DEBUG(" ");
 340   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 341   if (cluster->router_id.empty())
 342     cluster->router_id = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 343   auto* router = zone->create_router(cluster->router_id);
 344   zone->add_route(router, nullptr, nullptr, nullptr, {});
 345
 346   zone->seal();
 347   simgrid::kernel::routing::on_cluster_creation(*cluster);
 348 }
 349
 350 void sg_platf_new_tag_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 /*************************************************************************************************/
 364 /** @brief Set the links for internal node inside a Cluster(Star) */
 365 static void sg_platf_cluster_set_hostlink(simgrid::kernel::routing::StarZone* zone,
 366                                           simgrid::kernel::routing::NetPoint* netpoint, simgrid::s4u::Link* link_up,
 367                                           simgrid::s4u::Link* link_down, simgrid::kernel::resource::LinkImpl* backbone)
 368 {
 369   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
 370   if (backbone) {
 371     zone->add_route(netpoint, nullptr, nullptr, nullptr, {link_up->get_impl(), backbone}, false);
 372     zone->add_route(nullptr, netpoint, nullptr, nullptr, {backbone, link_down->get_impl()}, false);
 373   } else {
 374     zone->add_route(netpoint, nullptr, nullptr, nullptr, {link_up->get_impl()}, false);
 375     zone->add_route(nullptr, netpoint, nullptr, nullptr, {link_down->get_impl()}, false);
 376   }
 377 }
 378
 379 /** @brief Add a link connecting a host to the rest of its StarZone */
 380 static void sg_platf_build_hostlink(simgrid::kernel::routing::StarZone* zone,
 381                                     const simgrid::kernel::routing::HostLinkCreationArgs* hostlink,
 382                                     simgrid::kernel::resource::LinkImpl* backbone)
 383 {
 384   simgrid::kernel::routing::NetPoint* netpoint = simgrid::s4u::Host::by_name(hostlink->id)->get_netpoint();
 385   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 386
 387   simgrid::s4u::Link* linkUp   = simgrid::s4u::Link::by_name_or_null(hostlink->link_up);
 388   simgrid::s4u::Link* linkDown = simgrid::s4u::Link::by_name_or_null(hostlink->link_down);
 389
 390   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 391   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 392   sg_platf_cluster_set_hostlink(zone, netpoint, linkUp, linkDown, backbone);
 393 }
 394
 395 /** @brief Create a cabinet (set of hosts) inside a Cluster(StarZone) */
 396 static void sg_platf_build_cabinet(simgrid::kernel::routing::StarZone* zone,
 397                                    const simgrid::kernel::routing::CabinetCreationArgs* args,
 398                                    simgrid::kernel::resource::LinkImpl* backbone)
 399 {
 400   for (int const& radical : args->radicals) {
 401     std::string id   = args->prefix + std::to_string(radical) + args->suffix;
 402     auto const* host = zone->create_host(id, std::vector<double>{args->speed})->seal();
 403
 404     auto* link_up =
 405         zone->create_link("link_" + id + "_UP", std::vector<double>{args->bw})->set_latency(args->lat)->seal();
 406     auto* link_down =
 407         zone->create_link("link_" + id + "_DOWN", std::vector<double>{args->bw})->set_latency(args->lat)->seal();
 408
 409     sg_platf_cluster_set_hostlink(zone, host->get_netpoint(), link_up, link_down, backbone);
 410   }
 411 }
 412
 413 void sg_platf_zone_cluster_populate(simgrid::kernel::routing::ClusterZoneCreationArgs* cluster)
 414 {
 415   auto* zone = dynamic_cast<simgrid::kernel::routing::StarZone*>(current_routing);
 416   xbt_assert(zone, "Host_links are only valid for Cluster(Star)");
 417
 418   simgrid::kernel::resource::LinkImpl* backbone = nullptr;
 419   /* create backbone */
 420   if (cluster->backbone) {
 421     sg_platf_new_link(cluster->backbone.get());
 422     backbone = simgrid::s4u::Link::by_name(cluster->backbone->id)->get_impl();
 423   }
 424
 425   /* create host_links for hosts */
 426   for (auto const& hostlink : cluster->host_links) {
 427     sg_platf_build_hostlink(zone, &hostlink, backbone);
 428   }
 429
 430   /* create cabinets */
 431   for (auto const& cabinet : cluster->cabinets) {
 432     sg_platf_build_cabinet(zone, &cabinet, backbone);
 433   }
 434 }
 435
 436 void routing_cluster_add_backbone(std::unique_ptr<simgrid::kernel::routing::LinkCreationArgs> link)
 437 {
 438   zone_cluster.backbone = std::move(link);
 439 }
 440
 441 void sg_platf_new_cabinet(const simgrid::kernel::routing::CabinetCreationArgs* args)
 442 {
 443   xbt_assert(args, "Invalid nullptr argument");
 444   zone_cluster.cabinets.emplace_back(*args);
 445 }
 446
 447 /*************************************************************************************************/
 448 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 449 {
 450   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 451                                    route->symmetrical);
 452 }
 453
 454 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
 455 {
 456   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 457                                           bypassRoute->link_list, bypassRoute->symmetrical);
 458 }
 459
 460 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 461 {
 462   sg_host_t host = sg_host_by_name(actor->host);
 463   if (not host) {
 464     // The requested host does not exist. Do a nice message to the user
 465     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 466                       "' does not exist\nExisting hosts: '";
 467
 468     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
 469
 470     for (auto const& some_host : list) {
 471       msg += some_host->get_name();
 472       msg += "', '";
 473       if (msg.length() > 1024) {
 474         msg.pop_back(); // remove trailing quote
 475         msg += "...(list truncated)......";
 476         break;
 477       }
 478     }
 479     xbt_die("%s", msg.c_str());
 480   }
 481   const simgrid::kernel::actor::ActorCodeFactory& factory =
 482       simgrid::kernel::EngineImpl::get_instance()->get_function(actor->function);
 483   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
 484
 485   double start_time = actor->start_time;
 486   double kill_time  = actor->kill_time;
 487   bool auto_restart = actor->restart_on_failure;
 488
 489   std::string actor_name                 = actor->args[0];
 490   simgrid::kernel::actor::ActorCode code = factory(std::move(actor->args));
 491
 492   auto* arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 493                                                      auto_restart);
 494
 495   host->get_impl()->add_actor_at_boot(arg);
 496
 497   if (start_time > SIMIX_get_clock()) {
 498     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, actor->properties,
 499                                                  auto_restart);
 500
 501     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 502     simgrid::simix::Timer::set(start_time, [arg, auto_restart]() {
 503       simgrid::kernel::actor::ActorImplPtr new_actor =
 504           simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), arg->code, arg->data, arg->host, nullptr);
 505       new_actor->set_properties(arg->properties);
 506       if (arg->kill_time >= 0)
 507         new_actor->set_kill_time(arg->kill_time);
 508       if (auto_restart)
 509         new_actor->set_auto_restart(auto_restart);
 510       delete arg;
 511     });
 512   } else { // start_time <= SIMIX_get_clock()
 513     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
 514
 515     try {
 516       simgrid::kernel::actor::ActorImplPtr new_actor = nullptr;
 517       new_actor = simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), code, nullptr, host, nullptr);
 518       new_actor->set_properties(arg->properties);
 519       /* The actor creation will fail if the host is currently dead, but that's fine */
 520       if (arg->kill_time >= 0)
 521         new_actor->set_kill_time(arg->kill_time);
 522       if (auto_restart)
 523         new_actor->set_auto_restart(auto_restart);
 524     } catch (simgrid::HostFailureException const&) {
 525       XBT_WARN("Deployment includes some initially turned off Hosts ... nevermind.");
 526     }
 527   }
 528 }
 529
 530 /**
 531  * @brief Auxiliary function to build the object NetZoneImpl
 532  *
 533  * Builds the objects, setting its father properties and root netzone if needed
 534  * @param zone the parameters defining the Zone to build.
 535  * @return Pointer to recently created netzone
 536  */
 537 static simgrid::kernel::routing::NetZoneImpl*
 538 sg_platf_create_zone(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 539 {
 540   /* search the routing model */
 541   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 542
 543   if (strcasecmp(zone->routing.c_str(), "Cluster") == 0) {
 544     new_zone = new simgrid::kernel::routing::StarZone(zone->id);
 545   } else if (strcasecmp(zone->routing.c_str(), "Dijkstra") == 0) {
 546     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, false);
 547   } else if (strcasecmp(zone->routing.c_str(), "DijkstraCache") == 0) {
 548     new_zone = new simgrid::kernel::routing::DijkstraZone(zone->id, true);
 549   } else if (strcasecmp(zone->routing.c_str(), "Floyd") == 0) {
 550     new_zone = new simgrid::kernel::routing::FloydZone(zone->id);
 551   } else if (strcasecmp(zone->routing.c_str(), "Full") == 0) {
 552     new_zone = new simgrid::kernel::routing::FullZone(zone->id);
 553   } else if (strcasecmp(zone->routing.c_str(), "None") == 0) {
 554     new_zone = new simgrid::kernel::routing::EmptyZone(zone->id);
 555   } else if (strcasecmp(zone->routing.c_str(), "Vivaldi") == 0) {
 556     new_zone = new simgrid::kernel::routing::VivaldiZone(zone->id);
 557   } else if (strcasecmp(zone->routing.c_str(), "Wifi") == 0) {
 558     new_zone = new simgrid::kernel::routing::WifiZone(zone->id);
 559   } else {
 560     xbt_die("Not a valid model!");
 561   }
 562   new_zone->set_parent(current_routing);
 563
 564   return new_zone;
 565 }
 566
 567 /**
 568  * @brief Add a Zone to the platform
 569  *
 570  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 571  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 572  *
 573  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 574  *
 575  * @param zone the parameters defining the Zone to build.
 576  */
 577 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_Zone_begin(const simgrid::kernel::routing::ZoneCreationArgs* zone)
 578 {
 579   zone_cluster.routing = zone->routing;
 580   current_routing = sg_platf_create_zone(zone);
 581
 582   return current_routing;
 583 }
 584
 585 void sg_platf_new_Zone_set_properties(const std::unordered_map<std::string, std::string>& props)
 586 {
 587   xbt_assert(current_routing, "Cannot set properties of the current Zone: none under construction");
 588
 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: none under construction");
 601   if (strcasecmp(zone_cluster.routing.c_str(), "Cluster") == 0) {
 602     sg_platf_zone_cluster_populate(&zone_cluster);
 603     zone_cluster.routing = "";
 604     zone_cluster.host_links.clear();
 605     zone_cluster.cabinets.clear();
 606     zone_cluster.backbone.reset();
 607   }
 608   current_routing->seal();
 609   current_routing = current_routing->get_parent();
 610 }
 611
 612 /** @brief Add a link connecting a host to the rest of its Zone (which must be cluster or vivaldi) */
 613 void sg_platf_new_hostlink(const simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 614 {
 615   xbt_assert(hostlink, "Invalid nullptr parameter");
 616   zone_cluster.host_links.emplace_back(*hostlink);
 617 }
 618
 619 void sg_platf_new_trace(simgrid::kernel::routing::ProfileCreationArgs* args)
 620 {
 621   simgrid::kernel::profile::Profile* profile;
 622   if (not args->file.empty()) {
 623     profile = simgrid::kernel::profile::Profile::from_file(args->file);
 624   } else {
 625     xbt_assert(not args->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 626                args->id.c_str());
 627     profile = simgrid::kernel::profile::Profile::from_string(args->id, args->pc_data, args->periodicity);
 628   }
 629   traces_set_list.insert({args->id, profile});
 630 }