src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2018. 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/kernel/routing/ClusterZone.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/s4u/Engine.hpp"
  18 #include "src/include/simgrid/sg_config.hpp"
  19 #include "src/kernel/EngineImpl.hpp"
  20 #include "src/simix/smx_host_private.hpp"
  21 #include "src/simix/smx_private.hpp"
  22 #include "src/surf/HostImpl.hpp"
  23 #include "src/surf/xml/platf_private.hpp"
  24
  25 #include <string>
  26
  27 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  28
  29 XBT_PRIVATE std::map<std::string, simgrid::surf::StorageImpl*> mount_list;
  30 XBT_PRIVATE std::vector<std::string> known_storages;
  31
  32 namespace simgrid {
  33 namespace surf {
  34
  35 simgrid::xbt::signal<void(kernel::routing::ClusterCreationArgs*)> on_cluster;
  36 }
  37 }
  38
  39 static int surf_parse_models_setup_already_called = 0;
  40 std::map<std::string, simgrid::surf::StorageType*> storage_types;
  41
  42 /** The current AS in the parsing */
  43 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  44 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  45 {
  46   return current_routing;
  47 }
  48
  49 /** Module management function: creates all internal data structures */
  50 void sg_platf_init()
  51 { /* Do nothing: just for symmetry of user code */
  52 }
  53
  54 /** Module management function: frees all internal data structures */
  55 void sg_platf_exit() {
  56   simgrid::surf::on_cluster.disconnectSlots();
  57   simgrid::s4u::onPlatformCreated.disconnectSlots();
  58
  59   /* make sure that we will reinit the models while loading the platf once reinited */
  60   surf_parse_models_setup_already_called = 0;
  61   surf_parse_lex_destroy();
  62 }
  63
  64 /** @brief Add an host to the current AS */
  65 void sg_platf_new_host(simgrid::kernel::routing::HostCreationArgs* args)
  66 {
  67   std::map<std::string, std::string> props;
  68   if (args->properties) {
  69     for (auto const& elm : *args->properties)
  70       props.insert({elm.first, elm.second});
  71     delete args->properties;
  72   }
  73
  74   simgrid::s4u::Host* host =
  75       routing_get_current()->create_host(args->id, &args->speed_per_pstate, args->core_amount, &props);
  76
  77   host->pimpl_->storage_ = mount_list;
  78   mount_list.clear();
  79
  80   /* Change from the defaults */
  81   if (args->state_trace)
  82     host->pimpl_cpu->setStateTrace(args->state_trace);
  83   if (args->speed_trace)
  84     host->pimpl_cpu->set_speed_trace(args->speed_trace);
  85   if (args->pstate != 0)
  86     host->pimpl_cpu->setPState(args->pstate);
  87   if (args->coord && strcmp(args->coord, ""))
  88     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
  89 }
  90
  91 /** @brief Add a "router" to the network element list */
  92 simgrid::kernel::routing::NetPoint* sg_platf_new_router(std::string name, const char* coords)
  93 {
  94   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
  95
  96   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
  97     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
  98   xbt_assert(nullptr == simgrid::s4u::Engine::getInstance()->getNetpointByNameOrNull(name),
  99              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
 100
 101   simgrid::kernel::routing::NetPoint* netpoint =
 102       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
 103   XBT_DEBUG("Router '%s' has the id %u", name.c_str(), netpoint->id());
 104
 105   if (coords && strcmp(coords, ""))
 106     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
 107
 108
 109   return netpoint;
 110 }
 111
 112 void sg_platf_new_link(simgrid::kernel::routing::LinkCreationArgs* link)
 113 {
 114   std::vector<std::string> names;
 115
 116   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
 117     names.push_back(link->id+ "_UP");
 118     names.push_back(link->id+ "_DOWN");
 119   } else {
 120     names.push_back(link->id);
 121   }
 122   for (auto const& link_name : names) {
 123     simgrid::kernel::resource::LinkImpl* l =
 124         surf_network_model->createLink(link_name, link->bandwidth, link->latency, link->policy);
 125
 126     if (link->properties) {
 127       for (auto const& elm : *link->properties)
 128         l->setProperty(elm.first, elm.second);
 129     }
 130
 131     if (link->latency_trace)
 132       l->setLatencyTrace(link->latency_trace);
 133     if (link->bandwidth_trace)
 134       l->setBandwidthTrace(link->bandwidth_trace);
 135     if (link->state_trace)
 136       l->setStateTrace(link->state_trace);
 137   }
 138   delete link->properties;
 139 }
 140
 141 void sg_platf_new_cluster(simgrid::kernel::routing::ClusterCreationArgs* cluster)
 142 {
 143   using simgrid::kernel::routing::ClusterZone;
 144   using simgrid::kernel::routing::DragonflyZone;
 145   using simgrid::kernel::routing::FatTreeZone;
 146   using simgrid::kernel::routing::TorusZone;
 147
 148   int rankId=0;
 149
 150   // What an inventive way of initializing the AS that I have as ancestor :-(
 151   simgrid::kernel::routing::ZoneCreationArgs zone;
 152   zone.id = cluster->id;
 153   switch (cluster->topology) {
 154     case simgrid::kernel::routing::ClusterTopology::TORUS:
 155       zone.routing = A_surfxml_AS_routing_ClusterTorus;
 156       break;
 157     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
 158       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
 159       break;
 160     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
 161       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
 162       break;
 163     default:
 164       zone.routing = A_surfxml_AS_routing_Cluster;
 165       break;
 166   }
 167   sg_platf_new_Zone_begin(&zone);
 168   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
 169   current_as->parse_specific_arguments(cluster);
 170
 171   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 172     current_as->num_links_per_node_++;
 173     current_as->has_loopback_ = true;
 174   }
 175
 176   if(cluster->limiter_link > 0){
 177     current_as->num_links_per_node_++;
 178     current_as->has_limiter_ = true;
 179   }
 180
 181   for (int const& i : *cluster->radicals) {
 182     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
 183     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
 184
 185     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
 186
 187     simgrid::kernel::routing::HostCreationArgs host;
 188     host.id = host_id.c_str();
 189     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
 190       host.properties = new std::map<std::string, std::string>;
 191
 192       for (auto const& elm : *cluster->properties)
 193         host.properties->insert({elm.first, elm.second});
 194     }
 195
 196     host.speed_per_pstate = cluster->speeds;
 197     host.pstate = 0;
 198     host.core_amount = cluster->core_amount;
 199     host.coord = "";
 200     sg_platf_new_host(&host);
 201     XBT_DEBUG("</host>");
 202
 203     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
 204
 205     // All links are saved in a matrix;
 206     // every row describes a single node; every node may have multiple links.
 207     // the first column may store a link from x to x if p_has_loopback is set
 208     // the second column may store a limiter link if p_has_limiter is set
 209     // other columns are to store one or more link for the node
 210
 211     //add a loopback link
 212     simgrid::kernel::resource::LinkImpl* linkUp   = nullptr;
 213     simgrid::kernel::resource::LinkImpl* linkDown = nullptr;
 214     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 215       std::string tmp_link = link_id + "_loopback";
 216       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
 217
 218       simgrid::kernel::routing::LinkCreationArgs link;
 219       link.id        = tmp_link;
 220       link.bandwidth = cluster->loopback_bw;
 221       link.latency   = cluster->loopback_lat;
 222       link.policy    = simgrid::s4u::Link::SharingPolicy::FATPIPE;
 223       sg_platf_new_link(&link);
 224       linkUp   = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
 225       linkDown = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
 226
 227       auto* as_cluster = static_cast<ClusterZone*>(current_as);
 228       as_cluster->private_links_.insert({as_cluster->node_pos(rankId), {linkUp, linkDown}});
 229     }
 230
 231     //add a limiter link (shared link to account for maximal bandwidth of the node)
 232     linkUp   = nullptr;
 233     linkDown = nullptr;
 234     if(cluster->limiter_link > 0){
 235       std::string tmp_link = std::string(link_id) + "_limiter";
 236       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
 237
 238       simgrid::kernel::routing::LinkCreationArgs link;
 239       link.id        = tmp_link;
 240       link.bandwidth = cluster->limiter_link;
 241       link.latency = 0;
 242       link.policy    = simgrid::s4u::Link::SharingPolicy::SHARED;
 243       sg_platf_new_link(&link);
 244       linkDown = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
 245       linkUp   = linkDown;
 246       current_as->private_links_.insert({current_as->node_pos_with_loopback(rankId), {linkUp, linkDown}});
 247     }
 248
 249     //call the cluster function that adds the others links
 250     if (cluster->topology == simgrid::kernel::routing::ClusterTopology::FAT_TREE) {
 251       static_cast<FatTreeZone*>(current_as)->add_processing_node(i);
 252     } else {
 253       current_as->create_links_for_node(cluster, i, rankId, current_as->node_pos_with_loopback_limiter(rankId));
 254     }
 255     rankId++;
 256   }
 257   delete cluster->properties;
 258
 259   // Add a router.
 260   XBT_DEBUG(" ");
 261   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
 262   if (cluster->router_id.empty()) {
 263     std::string newid   = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
 264     current_as->router_ = sg_platf_new_router(newid, NULL);
 265   } else {
 266     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
 267   }
 268
 269   //Make the backbone
 270   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 271
 272     simgrid::kernel::routing::LinkCreationArgs link;
 273     link.id        = std::string(cluster->id)+ "_backbone";
 274     link.bandwidth = cluster->bb_bw;
 275     link.latency   = cluster->bb_lat;
 276     link.policy    = cluster->bb_sharing_policy;
 277
 278     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
 279     sg_platf_new_link(&link);
 280
 281     routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl::byName(link.id));
 282   }
 283
 284   XBT_DEBUG("</AS>");
 285   sg_platf_new_Zone_seal();
 286
 287   simgrid::surf::on_cluster(cluster);
 288   delete cluster->radicals;
 289 }
 290
 291 void routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl* bb)
 292 {
 293   simgrid::kernel::routing::ClusterZone* cluster =
 294       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 295
 296   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 297   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->get_cname());
 298
 299   cluster->backbone_ = bb;
 300   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->get_cname());
 301 }
 302
 303 void sg_platf_new_cabinet(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.c_str();
 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.bandwidth = 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 void sg_platf_new_storage(simgrid::kernel::routing::StorageCreationArgs* storage)
 331 {
 332   xbt_assert(std::find(known_storages.begin(), known_storages.end(), storage->id) == known_storages.end(),
 333              "Refusing to add a second storage named \"%s\"", storage->id.c_str());
 334
 335   simgrid::surf::StorageType* stype;
 336   auto st = storage_types.find(storage->type_id);
 337   if (st != storage_types.end()) {
 338     stype = st->second;
 339   } else {
 340     xbt_die("No storage type '%s'", storage->type_id.c_str());
 341   }
 342
 343   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id.c_str(),
 344             storage->type_id.c_str(), storage->content.c_str());
 345
 346   known_storages.push_back(storage->id);
 347
 348   // if storage content is not specified use the content of storage_type if any
 349   if (storage->content.empty() && not stype->content.empty()) {
 350     storage->content = stype->content;
 351     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s)", storage->id.c_str(),
 352               stype->id.c_str());
 353   }
 354
 355   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
 356             "\n\t\tmodel '%s' \n\t\tcontent '%s' "
 357             "\n\t\tproperties '%p''\n",
 358             storage->id.c_str(), stype->model.c_str(), stype->id.c_str(), storage->content.c_str(),
 359             storage->properties);
 360
 361   auto s = surf_storage_model->createStorage(storage->id, stype->id, storage->content, storage->attach);
 362
 363   if (storage->properties) {
 364     for (auto const& elm : *storage->properties)
 365       s->setProperty(elm.first, elm.second);
 366     delete storage->properties;
 367   }
 368 }
 369
 370 void sg_platf_new_storage_type(simgrid::kernel::routing::StorageTypeCreationArgs* storage_type)
 371 {
 372   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
 373              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
 374
 375   simgrid::surf::StorageType* stype =
 376       new simgrid::surf::StorageType(storage_type->id, storage_type->model, storage_type->content,
 377                                      storage_type->properties, storage_type->model_properties, storage_type->size);
 378
 379   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
 380             storage_type->model.c_str(), storage_type->content.c_str());
 381
 382   storage_types[storage_type->id] = stype;
 383 }
 384
 385 void sg_platf_new_mount(simgrid::kernel::routing::MountCreationArgs* mount)
 386 {
 387   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
 388              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
 389
 390   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
 391
 392   if (mount_list.empty())
 393     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
 394   mount_list.insert({mount->name, simgrid::s4u::Engine::getInstance()->storageByName(mount->storageId)->getImpl()});
 395 }
 396
 397 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
 398 {
 399   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
 400                                    route->symmetrical);
 401 }
 402
 403 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
 404 {
 405   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
 406                                           bypassRoute->link_list, bypassRoute->symmetrical);
 407 }
 408
 409 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
 410 {
 411   sg_host_t host = sg_host_by_name(actor->host);
 412   if (not host) {
 413     // The requested host does not exist. Do a nice message to the user
 414     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
 415                       "' does not exist\nExisting hosts: '";
 416
 417     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::getInstance()->getAllHosts();
 418
 419     for (auto const& host : list) {
 420       msg += host->get_name();
 421       msg += "', '";
 422       if (msg.length() > 1024) {
 423         msg.pop_back(); // remove trailing quote
 424         msg += "...(list truncated)......";
 425         break;
 426       }
 427     }
 428     xbt_die("%s", msg.c_str());
 429   }
 430   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
 431   xbt_assert(factory, "Function '%s' unknown", actor->function);
 432
 433   double start_time = actor->start_time;
 434   double kill_time  = actor->kill_time;
 435   bool auto_restart = actor->on_failure != simgrid::kernel::routing::ActorOnFailure::DIE;
 436
 437   std::string actor_name     = actor->args[0];
 438   std::function<void()> code = factory(std::move(actor->args));
 439   std::shared_ptr<std::map<std::string, std::string>> properties(actor->properties);
 440
 441   simgrid::kernel::actor::ProcessArg* arg =
 442       new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 443
 444   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
 445
 446   if (start_time > SIMIX_get_clock()) {
 447
 448     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
 449
 450     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
 451     SIMIX_timer_set(start_time, [arg, auto_restart]() {
 452       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
 453                                                                 arg->host, arg->properties.get(), nullptr);
 454       if (arg->kill_time >= 0)
 455         simcall_process_set_kill_time(actor, arg->kill_time);
 456       if (auto_restart)
 457         SIMIX_process_auto_restart_set(actor, auto_restart);
 458       delete arg;
 459     });
 460   } else {                      // start_time <= SIMIX_get_clock()
 461     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
 462
 463     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
 464                                                               arg->properties.get(), nullptr);
 465
 466     /* The actor creation will fail if the host is currently dead, but that's fine */
 467     if (actor != nullptr) {
 468       if (arg->kill_time >= 0)
 469         simcall_process_set_kill_time(actor, arg->kill_time);
 470       if (auto_restart)
 471         SIMIX_process_auto_restart_set(actor, auto_restart);
 472     }
 473   }
 474 }
 475
 476 void sg_platf_new_peer(simgrid::kernel::routing::PeerCreationArgs* peer)
 477 {
 478   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 479   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
 480
 481   std::vector<double> speedPerPstate;
 482   speedPerPstate.push_back(peer->speed);
 483   simgrid::s4u::Host* host = as->create_host(peer->id.c_str(), &speedPerPstate, 1, nullptr);
 484
 485   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
 486
 487   /* Change from the defaults */
 488   if (peer->state_trace)
 489     host->pimpl_cpu->setStateTrace(peer->state_trace);
 490   if (peer->speed_trace)
 491     host->pimpl_cpu->set_speed_trace(peer->speed_trace);
 492 }
 493
 494 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
 495
 496 void sg_platf_end() {
 497   simgrid::s4u::onPlatformCreated();
 498 }
 499
 500 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
 501 static void surf_config_models_setup()
 502 {
 503   std::string host_model_name    = simgrid::config::get_value<std::string>("host/model");
 504   std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
 505   std::string cpu_model_name     = simgrid::config::get_value<std::string>("cpu/model");
 506   std::string storage_model_name = simgrid::config::get_value<std::string>("storage/model");
 507
 508   /* The compound host model is needed when using non-default net/cpu models */
 509   if ((not xbt_cfg_is_default_value("network/model") || not xbt_cfg_is_default_value("cpu/model")) &&
 510       xbt_cfg_is_default_value("host/model")) {
 511     host_model_name = "compound";
 512     xbt_cfg_set_string("host/model", host_model_name.c_str());
 513   }
 514
 515   XBT_DEBUG("host model: %s", host_model_name.c_str());
 516   if (host_model_name == "compound") {
 517     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
 518     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
 519
 520     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
 521     surf_cpu_model_description[cpu_id].model_init_preparse();
 522
 523     int network_id = find_model_description(surf_network_model_description, network_model_name);
 524     surf_network_model_description[network_id].model_init_preparse();
 525   }
 526
 527   XBT_DEBUG("Call host_model_init");
 528   int host_id = find_model_description(surf_host_model_description, host_model_name);
 529   surf_host_model_description[host_id].model_init_preparse();
 530
 531   XBT_DEBUG("Call vm_model_init");
 532   surf_vm_model_init_HL13();
 533
 534   XBT_DEBUG("Call storage_model_init");
 535   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
 536   surf_storage_model_description[storage_id].model_init_preparse();
 537 }
 538
 539 /**
 540  * \brief Add a Zone to the platform
 541  *
 542  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
 543  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
 544  *
 545  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
 546  *
 547  * @param zone the parameters defining the Zone to build.
 548  */
 549 simgrid::s4u::NetZone* sg_platf_new_Zone_begin(simgrid::kernel::routing::ZoneCreationArgs* zone)
 550 {
 551   if (not surf_parse_models_setup_already_called) {
 552     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 553      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
 554      *
 555      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 556      * (FIXME: check it out by creating a file beginning with one of these tags)
 557      * but cluster and peer create ASes internally, so putting the code in there is ok.
 558      */
 559     surf_parse_models_setup_already_called = 1;
 560     surf_config_models_setup();
 561   }
 562
 563   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
 564                             * any further config now that we created some real content */
 565
 566   /* search the routing model */
 567   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
 568   switch (zone->routing) {
 569     case A_surfxml_AS_routing_Cluster:
 570       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id);
 571       break;
 572     case A_surfxml_AS_routing_ClusterDragonfly:
 573       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id);
 574       break;
 575     case A_surfxml_AS_routing_ClusterTorus:
 576       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id);
 577       break;
 578     case A_surfxml_AS_routing_ClusterFatTree:
 579       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id);
 580       break;
 581     case A_surfxml_AS_routing_Dijkstra:
 582       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, false);
 583       break;
 584     case A_surfxml_AS_routing_DijkstraCache:
 585       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, true);
 586       break;
 587     case A_surfxml_AS_routing_Floyd:
 588       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id);
 589       break;
 590     case A_surfxml_AS_routing_Full:
 591       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id);
 592       break;
 593     case A_surfxml_AS_routing_None:
 594       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id);
 595       break;
 596     case A_surfxml_AS_routing_Vivaldi:
 597       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id);
 598       break;
 599     default:
 600       xbt_die("Not a valid model!");
 601       break;
 602   }
 603
 604   if (current_routing == nullptr) { /* it is the first one */
 605     xbt_assert(simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ == nullptr,
 606                "All defined components must belong to a networking zone.");
 607     simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ = new_zone;
 608
 609   } else {
 610     /* set the father behavior */
 611     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 612       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
 613     /* add to the sons dictionary */
 614     current_routing->getChildren()->push_back(static_cast<simgrid::s4u::NetZone*>(new_zone));
 615   }
 616
 617   /* set the new current component of the tree */
 618   current_routing = new_zone;
 619
 620   simgrid::s4u::NetZone::onCreation(*new_zone); // notify the signal
 621
 622   return new_zone;
 623 }
 624
 625 /**
 626  * \brief Specify that the description of the current AS is finished
 627  *
 628  * Once you've declared all the content of your AS, you have to seal
 629  * it with this call. Your AS is not usable until you call this function.
 630  */
 631 void sg_platf_new_Zone_seal()
 632 {
 633   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
 634   current_routing->seal();
 635   simgrid::s4u::NetZone::onSeal(*current_routing);
 636   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->getFather());
 637 }
 638
 639 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
 640 void sg_platf_new_hostlink(simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
 641 {
 642   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id.c_str())->pimpl_netpoint;
 643   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
 644   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 645              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
 646
 647   simgrid::kernel::resource::LinkImpl* linkUp   = simgrid::kernel::resource::LinkImpl::byName(hostlink->link_up);
 648   simgrid::kernel::resource::LinkImpl* linkDown = simgrid::kernel::resource::LinkImpl::byName(hostlink->link_down);
 649
 650   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
 651   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
 652
 653   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 654
 655   if (as_cluster->private_links_.find(netpoint->id()) != as_cluster->private_links_.end())
 656     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
 657
 658   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
 659   as_cluster->private_links_.insert({netpoint->id(), {linkUp, linkDown}});
 660 }
 661
 662 void sg_platf_new_trace(simgrid::kernel::routing::TraceCreationArgs* trace)
 663 {
 664   tmgr_trace_t tmgr_trace;
 665   if (not trace->file.empty()) {
 666     tmgr_trace = tmgr_trace_new_from_file(trace->file);
 667   } else {
 668     xbt_assert(not trace->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
 669                trace->id.c_str());
 670     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
 671   }
 672   traces_set_list.insert({trace->id, tmgr_trace});
 673 }