src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2019. 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/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/simix/smx_host_private.hpp"
  23 #include "src/simix/smx_private.hpp"
  24 #include "src/surf/HostImpl.hpp"
  25 #include "src/surf/xml/platf_private.hpp"
  26
  27 #include <string>
  28
  29 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  30
  31 XBT_PRIVATE std::map<std::string, simgrid::surf::StorageImpl*> mount_list;
  32 XBT_PRIVATE std::vector<std::string> known_storages;
  33
  34 namespace simgrid {
  35 namespace surf {
  36
  37 simgrid::xbt::signal<void(kernel::routing::ClusterCreationArgs*)> on_cluster;
  38 }
  39 }
  40
  41 static int surf_parse_models_setup_already_called = 0;
  42 std::map<std::string, simgrid::surf::StorageType*> storage_types;
  43
  44 /** The current AS 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
  51 /** Module management function: creates all internal data structures */
  52 void sg_platf_init()
  53 {
  54   simgrid::s4u::on_platform_created.connect(check_disk_attachment);
  55 }
  56
  57 /** Module management function: frees all internal data structures */
  58 void sg_platf_exit() {
  59   simgrid::surf::on_cluster.disconnect_slots();
  60   simgrid::s4u::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(simgrid::kernel::routing::HostCreationArgs* args)
  69 {
  70   std::map<std::string, std::string> props;
  71   if (args->properties) {
  72     for (auto const& elm : *args->properties)
  73       props.insert({elm.first, elm.second});
  74     delete args->properties;
  75   }
  76
  77   simgrid::s4u::Host* host =
  78       routing_get_current()->create_host(args->id, &args->speed_per_pstate, args->core_amount, &props);
  79
  80   host->pimpl_->storage_ = mount_list;
  81   mount_list.clear();
  82
  83   /* Change from the defaults */
  84   if (args->state_trace)
  85     host->pimpl_cpu->set_state_profile(args->state_trace);
  86   if (args->speed_trace)
  87     host->pimpl_cpu->set_speed_profile(args->speed_trace);
  88   if (args->pstate != 0)
  89     host->pimpl_cpu->set_pstate(args->pstate);
  90   if (args->coord && strcmp(args->coord, ""))
  91     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
  92 }
  93
  94 /** @brief Add a "router" to the network element list */
  95 simgrid::kernel::routing::NetPoint* sg_platf_new_router(std::string name, const char* coords)
  96 {
  97   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
  98
  99   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 100     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
 101   xbt_assert(nullptr == simgrid::s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
 102              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
 103
 104   simgrid::kernel::routing::NetPoint* netpoint = new simgrid::kernel::routing::NetPoint(
 105       std::move(name), simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
 106   XBT_DEBUG("Router '%s' has the id %u", netpoint->get_cname(), netpoint->id());
 107
 108   if (coords && strcmp(coords, ""))
 109     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
 110
 111
 112   return netpoint;
 113 }
 114
 115 static void sg_platf_new_link(simgrid::kernel::routing::LinkCreationArgs* link, const std::string& link_name)
 116 {
 117   simgrid::kernel::resource::LinkImpl* l =
 118       surf_network_model->create_link(link_name, link->bandwidth, link->latency, link->policy);
 119
 120   if (link->properties) {
 121     for (auto const& elm : *link->properties)
 122       l->set_property(elm.first, elm.second);
 123   }
 124
 125   if (link->latency_trace)
 126     l->set_latency_profile(link->latency_trace);
 127   if (link->bandwidth_trace)
 128     l->set_bandwidth_profile(link->bandwidth_trace);
 129   if (link->state_trace)
 130     l->set_state_profile(link->state_trace);
 131 }
 132
 133 void sg_platf_new_link(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 = A_surfxml_AS_routing_ClusterTorus;
 159       break;
 160     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 161       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
 162       break;
 163     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 164       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
 165       break;
 166     default:
 167       zone.routing = A_surfxml_AS_routing_Cluster;
 168       break;
 169   }
 170   sg_platf_new_Zone_begin(&zone);
 171   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
 172   current_as->parse_specific_arguments(cluster);
 173
 174   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 175     current_as->num_links_per_node_++;
 176     current_as->has_loopback_ = true;
 177   }
 178
 179   if(cluster->limiter_link > 0){
 180     current_as->num_links_per_node_++;
 181     current_as->has_limiter_ = true;
 182   }
 183
 184   for (int const& i : *cluster->radicals) {
 185     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 186     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 187
 188     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
 189
 190     simgrid::kernel::routing::HostCreationArgs host;
 191     host.id = host_id.c_str();
 192     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
 193       host.properties = new std::unordered_map<std::string, std::string>;
 194
 195       for (auto const& elm : *cluster->properties)
 196         host.properties->insert({elm.first, elm.second});
 197     }
 198
 199     host.speed_per_pstate = cluster->speeds;
 200     host.pstate = 0;
 201     host.core_amount = cluster->core_amount;
 202     host.coord = "";
 203     sg_platf_new_host(&host);
 204     XBT_DEBUG("</host>");
 205
 206     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 207
 208     // All links are saved in a matrix;
 209     // every row describes a single node; every node may have multiple links.
 210     // the first column may store a link from x to x if p_has_loopback is set
 211     // the second column may store a limiter link if p_has_limiter is set
 212     // other columns are to store one or more link for the node
 213
 214     //add a loopback link
 215     simgrid::s4u::Link* linkUp   = nullptr;
 216     simgrid::s4u::Link* linkDown = nullptr;
 217     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 218       std::string tmp_link = link_id + "_loopback";
 219       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
 220
 221       simgrid::kernel::routing::LinkCreationArgs link;
 222       link.id        = tmp_link;
 223       link.bandwidth = cluster->loopback_bw;
 224       link.latency   = cluster->loopback_lat;
 225       link.policy    = simgrid::s4u::Link::SharingPolicy::FATPIPE;
 226       sg_platf_new_link(&link);
 227       linkUp   = simgrid::s4u::Link::by_name_or_null(tmp_link);
 228       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
 229
 230       auto* as_cluster = static_cast<ClusterZone*>(current_as);
 231       as_cluster->private_links_.insert({as_cluster->node_pos(rankId), {linkUp->get_impl(), linkDown->get_impl()}});
 232     }
 233
 234     //add a limiter link (shared link to account for maximal bandwidth of the node)
 235     linkUp   = nullptr;
 236     linkDown = nullptr;
 237     if(cluster->limiter_link > 0){
 238       std::string tmp_link = std::string(link_id) + "_limiter";
 239       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
 240
 241       simgrid::kernel::routing::LinkCreationArgs link;
 242       link.id        = tmp_link;
 243       link.bandwidth = cluster->limiter_link;
 244       link.latency = 0;
 245       link.policy    = simgrid::s4u::Link::SharingPolicy::SHARED;
 246       sg_platf_new_link(&link);
 247       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
 248       linkUp   = linkDown;
 249       current_as->private_links_.insert(
 250           {current_as->node_pos_with_loopback(rankId), {linkUp->get_impl(), linkDown->get_impl()}});
 251     }
 252
 253     //call the cluster function that adds the others links
 254     if (cluster->topology == simgrid::kernel::routing::ClusterTopology::FAT_TREE) {
 255       static_cast<FatTreeZone*>(current_as)->add_processing_node(i);
 256     } else {
 257       current_as->create_links_for_node(cluster, i, rankId, current_as->node_pos_with_loopback_limiter(rankId));
 258     }
 259     rankId++;
 260   }
 261   delete cluster->properties;
 262
 263   // Add a router.
 264   XBT_DEBUG(" ");
 265   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 266   if (cluster->router_id.empty()) {
 267     std::string newid   = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 268     current_as->router_ = sg_platf_new_router(newid, NULL);
 269   } else {
 270     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
 271   }
 272
 273   //Make the backbone
 274   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 275
 276     simgrid::kernel::routing::LinkCreationArgs link;
 277     link.id        = std::string(cluster->id)+ "_backbone";
 278     link.bandwidth = cluster->bb_bw;
 279     link.latency   = cluster->bb_lat;
 280     link.policy    = cluster->bb_sharing_policy;
 281
 282     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
 283     sg_platf_new_link(&link);
 284
 285     routing_cluster_add_backbone(simgrid::s4u::Link::by_name(link.id)->get_impl());
 286   }
 287
 288   XBT_DEBUG("</AS>");
 289   sg_platf_new_Zone_seal();
 290
 291   simgrid::surf::on_cluster(cluster);
 292   delete cluster->radicals;
 293 }
 294
 295 void routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl* bb)
 296 {
 297   simgrid::kernel::routing::ClusterZone* cluster =
 298       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 299
 300   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 301   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->get_cname());
 302
 303   cluster->backbone_ = bb;
 304   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->get_cname());
 305 }
 306
 307 void sg_platf_new_cabinet(simgrid::kernel::routing::CabinetCreationArgs* cabinet)
 308 {
 309   for (int const& radical : *cabinet->radicals) {
 310     std::string hostname = cabinet->prefix + std::to_string(radical) + cabinet->suffix;
 311     simgrid::kernel::routing::HostCreationArgs host;
 312     host.pstate           = 0;
 313     host.core_amount      = 1;
 314     host.id               = hostname.c_str();
 315     host.speed_per_pstate.push_back(cabinet->speed);
 316     sg_platf_new_host(&host);
 317
 318     simgrid::kernel::routing::LinkCreationArgs link;
 319     link.policy    = simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX;
 320     link.latency   = cabinet->lat;
 321     link.bandwidth = cabinet->bw;
 322     link.id        = "link_" + hostname;
 323     sg_platf_new_link(&link);
 324
 325     simgrid::kernel::routing::HostLinkCreationArgs host_link;
 326     host_link.id        = hostname;
 327     host_link.link_up   = std::string("link_") + hostname + "_UP";
 328     host_link.link_down = std::string("link_") + hostname + "_DOWN";
 329     sg_platf_new_hostlink(&host_link);
 330   }
 331   delete cabinet->radicals;
 332 }
 333
 334 void sg_platf_new_storage(simgrid::kernel::routing::StorageCreationArgs* storage)
 335 {
 336   xbt_assert(std::find(known_storages.begin(), known_storages.end(), storage->id) == known_storages.end(),
 337              "Refusing to add a second storage named \"%s\"", storage->id.c_str());
 338
 339   simgrid::surf::StorageType* stype;
 340   auto st = storage_types.find(storage->type_id);
 341   if (st != storage_types.end()) {
 342     stype = st->second;
 343   } else {
 344     xbt_die("No storage type '%s'", storage->type_id.c_str());
 345   }
 346
 347   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id.c_str(),
 348             storage->type_id.c_str(), storage->content.c_str());
 349
 350   known_storages.push_back(storage->id);
 351
 352   // if storage content is not specified use the content of storage_type if any
 353   if (storage->content.empty() && not stype->content.empty()) {
 354     storage->content = stype->content;
 355     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s)", storage->id.c_str(),
 356               stype->id.c_str());
 357   }
 358
 359   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
 360             "\n\t\tmodel '%s' \n\t\tcontent '%s' "
 361             "\n\t\tproperties '%p''\n",
 362             storage->id.c_str(), stype->model.c_str(), stype->id.c_str(), storage->content.c_str(),
 363             storage->properties);
 364
 365   auto s = surf_storage_model->createStorage(storage->id, stype->id, storage->content, storage->attach);
 366
 367   if (storage->properties) {
 368     for (auto const& elm : *storage->properties)
 369       s->set_property(elm.first, elm.second);
 370     delete storage->properties;
 371   }
 372 }
 373
 374 void sg_platf_new_storage_type(simgrid::kernel::routing::StorageTypeCreationArgs* storage_type)
 375 {
 376   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
 377              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
 378
 379   simgrid::surf::StorageType* stype =
 380       new simgrid::surf::StorageType(storage_type->id, storage_type->model, storage_type->content,
 381                                      storage_type->properties, storage_type->model_properties, storage_type->size);
 382
 383   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
 384             storage_type->model.c_str(), storage_type->content.c_str());
 385
 386   storage_types[storage_type->id] = stype;
 387 }
 388
 389 void sg_platf_new_mount(simgrid::kernel::routing::MountCreationArgs* mount)
 390 {
 391   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
 392              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
 393
 394   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
 395
 396   if (mount_list.empty())
 397     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
 398   mount_list.insert({mount->name, simgrid::s4u::Engine::get_instance()->storage_by_name(mount->storageId)->get_impl()});
 399 }
 400
 401 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 402 {
 403   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 404                                    route->symmetrical);
 405 }
 406
 407 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
 408 {
 409   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 410                                           bypassRoute->link_list, bypassRoute->symmetrical);
 411 }
 412
 413 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 414 {
 415   sg_host_t host = sg_host_by_name(actor->host);
 416   if (not host) {
 417     // The requested host does not exist. Do a nice message to the user
 418     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 419                       "' does not exist\nExisting hosts: '";
 420
 421     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
 422
 423     for (auto const& host : list) {
 424       msg += host->get_name();
 425       msg += "', '";
 426       if (msg.length() > 1024) {
 427         msg.pop_back(); // remove trailing quote
 428         msg += "...(list truncated)......";
 429         break;
 430       }
 431     }
 432     xbt_die("%s", msg.c_str());
 433   }
 434   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
 435   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
 436
 437   double start_time = actor->start_time;
 438   double kill_time  = actor->kill_time;
 439   bool auto_restart = actor->on_failure != simgrid::kernel::routing::ActorOnFailure::DIE;
 440
 441   std::string actor_name     = actor->args[0];
 442   simgrid::simix::ActorCode code = factory(std::move(actor->args));
 443   std::shared_ptr<std::unordered_map<std::string, std::string>> properties(actor->properties);
 444
 445   simgrid::kernel::actor::ProcessArg* arg =
 446       new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 447
 448   host->pimpl_->actors_at_boot_.emplace_back(arg);
 449
 450   if (start_time > SIMIX_get_clock()) {
 451
 452     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 453
 454     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 455     simgrid::simix::Timer::set(start_time, [arg, auto_restart]() {
 456       simgrid::kernel::actor::ActorImplPtr actor = simgrid::kernel::actor::ActorImpl::create(
 457           arg->name.c_str(), std::move(arg->code), arg->data, arg->host, arg->properties.get(), nullptr);
 458       if (arg->kill_time >= 0)
 459         actor->set_kill_time(arg->kill_time);
 460       if (auto_restart)
 461         actor->set_auto_restart(auto_restart);
 462       delete arg;
 463     });
 464   } else {                      // start_time <= SIMIX_get_clock()
 465     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
 466
 467     simgrid::kernel::actor::ActorImplPtr actor = nullptr;
 468     try {
 469       actor = simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), std::move(code), nullptr, host,
 470                                                         arg->properties.get(), nullptr);
 471     } catch (simgrid::HostFailureException const&) {
 472       XBT_WARN("Deployment includes some initially turned off Hosts ... nevermind.");
 473     }
 474     /* The actor creation will fail if the host is currently dead, but that's fine */
 475     if (actor != nullptr) {
 476       if (arg->kill_time >= 0)
 477         actor->set_kill_time(arg->kill_time);
 478       if (auto_restart)
 479         actor->set_auto_restart(auto_restart);
 480     }
 481   }
 482 }
 483
 484 void sg_platf_new_peer(simgrid::kernel::routing::PeerCreationArgs* peer)
 485 {
 486   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 487   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
 488
 489   std::vector<double> speedPerPstate;
 490   speedPerPstate.push_back(peer->speed);
 491   simgrid::s4u::Host* host = as->create_host(peer->id.c_str(), &speedPerPstate, 1, nullptr);
 492
 493   as->set_peer_link(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
 494
 495   /* Change from the defaults */
 496   if (peer->state_trace)
 497     host->pimpl_cpu->set_state_profile(peer->state_trace);
 498   if (peer->speed_trace)
 499     host->pimpl_cpu->set_speed_profile(peer->speed_trace);
 500 }
 501
 502 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
 503 static void surf_config_models_setup()
 504 {
 505   std::string host_model_name    = simgrid::config::get_value<std::string>("host/model");
 506   std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
 507   std::string cpu_model_name     = simgrid::config::get_value<std::string>("cpu/model");
 508   std::string storage_model_name = simgrid::config::get_value<std::string>("storage/model");
 509
 510   /* The compound host model is needed when using non-default net/cpu models */
 511   if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
 512       simgrid::config::is_default("host/model")) {
 513     host_model_name = "compound";
 514     simgrid::config::set_value("host/model", host_model_name);
 515   }
 516
 517   XBT_DEBUG("host model: %s", host_model_name.c_str());
 518   if (host_model_name == "compound") {
 519     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
 520     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
 521
 522     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
 523     surf_cpu_model_description[cpu_id].model_init_preparse();
 524
 525     int network_id = find_model_description(surf_network_model_description, network_model_name);
 526     surf_network_model_description[network_id].model_init_preparse();
 527   }
 528
 529   XBT_DEBUG("Call host_model_init");
 530   int host_id = find_model_description(surf_host_model_description, host_model_name);
 531   surf_host_model_description[host_id].model_init_preparse();
 532
 533   XBT_DEBUG("Call vm_model_init");
 534   surf_vm_model_init_HL13();
 535
 536   XBT_DEBUG("Call storage_model_init");
 537   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
 538   surf_storage_model_description[storage_id].model_init_preparse();
 539 }
 540
 541 /**
 542  * @brief Add a Zone to the platform
 543  *
 544  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 545  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 546  *
 547  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 548  *
 549  * @param zone the parameters defining the Zone to build.
 550  */
 551 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_Zone_begin(simgrid::kernel::routing::ZoneCreationArgs* zone)
 552 {
 553   if (not surf_parse_models_setup_already_called) {
 554     simgrid::s4u::on_platform_creation();
 555
 556     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 557      * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_connect
 558      *
 559      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 560      * (FIXME: check it out by creating a file beginning with one of these tags)
 561      * but cluster and peer come down to zone creations, so putting this verification here is correct.
 562      */
 563     surf_parse_models_setup_already_called = 1;
 564     surf_config_models_setup();
 565   }
 566
 567   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
 568                             * any further config now that we created some real content */
 569
 570   /* search the routing model */
 571   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 572   simgrid::kernel::resource::NetworkModel* netmodel =
 573       current_routing == nullptr ? surf_network_model : current_routing->network_model_;
 574   switch (zone->routing) {
 575     case A_surfxml_AS_routing_Cluster:
 576       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id, netmodel);
 577       break;
 578     case A_surfxml_AS_routing_ClusterDragonfly:
 579       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id, netmodel);
 580       break;
 581     case A_surfxml_AS_routing_ClusterTorus:
 582       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id, netmodel);
 583       break;
 584     case A_surfxml_AS_routing_ClusterFatTree:
 585       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id, netmodel);
 586       break;
 587     case A_surfxml_AS_routing_Dijkstra:
 588       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, netmodel, false);
 589       break;
 590     case A_surfxml_AS_routing_DijkstraCache:
 591       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, netmodel, true);
 592       break;
 593     case A_surfxml_AS_routing_Floyd:
 594       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id, netmodel);
 595       break;
 596     case A_surfxml_AS_routing_Full:
 597       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id, netmodel);
 598       break;
 599     case A_surfxml_AS_routing_None:
 600       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id, netmodel);
 601       break;
 602     case A_surfxml_AS_routing_Vivaldi:
 603       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id, netmodel);
 604       break;
 605     default:
 606       xbt_die("Not a valid model!");
 607       break;
 608   }
 609
 610   if (current_routing == nullptr) { /* it is the first one */
 611     simgrid::s4u::Engine::get_instance()->set_netzone_root(new_zone->get_iface());
 612   } else {
 613     /* set the father behavior */
 614     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 615       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
 616     /* add to the sons dictionary */
 617     current_routing->get_children()->push_back(new_zone);
 618   }
 619
 620   /* set the new current component of the tree */
 621   current_routing = new_zone;
 622   simgrid::s4u::NetZone::on_creation(*new_zone->get_iface()); // notify the signal
 623
 624   return new_zone;
 625 }
 626
 627 /**
 628  * @brief Specify that the description of the current AS is finished
 629  *
 630  * Once you've declared all the content of your AS, you have to seal
 631  * it with this call. Your AS is not usable until you call this function.
 632  */
 633 void sg_platf_new_Zone_seal()
 634 {
 635   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
 636   current_routing->seal();
 637   simgrid::s4u::NetZone::on_seal(*current_routing->get_iface());
 638   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->get_father());
 639 }
 640
 641 /** @brief Add a link connecting a host to the rest of its AS (which must be cluster or vivaldi) */
 642 void sg_platf_new_hostlink(simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 643 {
 644   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id.c_str())->pimpl_netpoint;
 645   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 646   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 647              "Only hosts from Cluster and Vivaldi ASes can get a host_link.");
 648
 649   simgrid::s4u::Link* linkUp   = simgrid::s4u::Link::by_name_or_null(hostlink->link_up);
 650   simgrid::s4u::Link* linkDown = simgrid::s4u::Link::by_name_or_null(hostlink->link_down);
 651
 652   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 653   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 654
 655   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 656
 657   if (as_cluster->private_links_.find(netpoint->id()) != as_cluster->private_links_.end())
 658     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
 659
 660   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
 661   as_cluster->private_links_.insert({netpoint->id(), {linkUp->get_impl(), linkDown->get_impl()}});
 662 }
 663
 664 void sg_platf_new_trace(simgrid::kernel::routing::ProfileCreationArgs* profile)
 665 {
 666   simgrid::kernel::profile::Profile* mgr_profile;
 667   if (not profile->file.empty()) {
 668     mgr_profile = simgrid::kernel::profile::Profile::from_file(profile->file);
 669   } else {
 670     xbt_assert(not profile->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 671                profile->id.c_str());
 672     mgr_profile = simgrid::kernel::profile::Profile::from_string(profile->id, profile->pc_data, profile->periodicity);
 673   }
 674   traces_set_list.insert({profile->id, mgr_profile});
 675 }