src/surf/sg_platf.cpp

   1 /* Copyright (c) 2006-2017. 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/s4u/engine.hpp"
   7
   8 #include "src/kernel/EngineImpl.hpp"
   9 #include "src/simix/smx_private.h"
  10
  11 #include "src/include/simgrid/sg_config.h"
  12
  13 #include "src/surf/HostImpl.hpp"
  14 #include "src/surf/cpu_interface.hpp"
  15 #include "src/surf/network_interface.hpp"
  16
  17 #include "src/kernel/routing/ClusterZone.hpp"
  18 #include "src/kernel/routing/DijkstraZone.hpp"
  19 #include "src/kernel/routing/DragonflyZone.hpp"
  20 #include "src/kernel/routing/EmptyZone.hpp"
  21 #include "src/kernel/routing/FatTreeZone.hpp"
  22 #include "src/kernel/routing/FloydZone.hpp"
  23 #include "src/kernel/routing/FullZone.hpp"
  24 #include "src/kernel/routing/NetPoint.hpp"
  25 #include "src/kernel/routing/NetZoneImpl.hpp"
  26 #include "src/kernel/routing/TorusZone.hpp"
  27 #include "src/kernel/routing/VivaldiZone.hpp"
  28 #include <string>
  29 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
  30
  31 XBT_PRIVATE std::vector<s_mount_t> mount_list;
  32
  33 namespace simgrid {
  34 namespace surf {
  35
  36 simgrid::xbt::signal<void(sg_platf_cluster_cbarg_t)> on_cluster;
  37
  38 }
  39 }
  40
  41 static int surf_parse_models_setup_already_called = 0;
  42
  43 /** The current AS in the parsing */
  44 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
  45 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
  46 {
  47   return current_routing;
  48 }
  49
  50 /** Module management function: creates all internal data structures */
  51 void sg_platf_init() {
  52 }
  53
  54 /** Module management function: frees all internal data structures */
  55 void sg_platf_exit() {
  56   simgrid::surf::on_cluster.disconnect_all_slots();
  57   simgrid::s4u::onPlatformCreated.disconnect_all_slots();
  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(sg_platf_host_cbarg_t args)
  66 {
  67   std::unordered_map<std::string, std::string> props;
  68   if (args->properties) {
  69     xbt_dict_cursor_t cursor=nullptr;
  70     char *key;
  71     char* data;
  72     xbt_dict_foreach (args->properties, cursor, key, data)
  73       props[key] = data;
  74     xbt_dict_free(&args->properties);
  75   }
  76
  77   simgrid::s4u::Host* host =
  78       routing_get_current()->createHost(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->setStateTrace(args->state_trace);
  86   if (args->speed_trace)
  87     host->pimpl_cpu->setSpeedTrace(args->speed_trace);
  88   if (args->pstate != 0)
  89     host->pimpl_cpu->setPState(args->pstate);
  90   if (args->coord && strcmp(args->coord, ""))
  91     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
  92
  93   if (TRACE_is_enabled() && TRACE_needs_platform())
  94     sg_instr_new_host(*host);
  95 }
  96
  97 /** @brief Add a "router" to the network element list */
  98 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const char* name, const char* coords)
  99 {
 100   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
 101
 102   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 103     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
 104   xbt_assert(nullptr == simgrid::s4u::Engine::instance()->netpointByNameOrNull(name),
 105              "Refusing to create a router named '%s': this name already describes a node.", name);
 106
 107   simgrid::kernel::routing::NetPoint* netpoint =
 108       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
 109   XBT_DEBUG("Router '%s' has the id %d", name, netpoint->id());
 110
 111   if (coords && strcmp(coords, ""))
 112     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
 113
 114   sg_instr_new_router(name);
 115
 116   return netpoint;
 117 }
 118
 119 void sg_platf_new_link(LinkCreationArgs* link)
 120 {
 121   std::vector<std::string> names;
 122
 123   if (link->policy == SURF_LINK_FULLDUPLEX) {
 124     names.push_back(link->id+ "_UP");
 125     names.push_back(link->id+ "_DOWN");
 126   } else {
 127     names.push_back(link->id);
 128   }
 129   for (auto link_name : names) {
 130     simgrid::surf::LinkImpl* l =
 131         surf_network_model->createLink(link_name.c_str(), link->bandwidth, link->latency, link->policy);
 132
 133     if (link->properties) {
 134       xbt_dict_cursor_t cursor = nullptr;
 135       char* key;
 136       char* data;
 137       xbt_dict_foreach (link->properties, cursor, key, data)
 138         l->setProperty(key, data);
 139       xbt_dict_free(&link->properties);
 140     }
 141
 142     if (link->latency_trace)
 143       l->setLatencyTrace(link->latency_trace);
 144     if (link->bandwidth_trace)
 145       l->setBandwidthTrace(link->bandwidth_trace);
 146     if (link->state_trace)
 147       l->setStateTrace(link->state_trace);
 148   }
 149 }
 150
 151 void sg_platf_new_cluster(sg_platf_cluster_cbarg_t cluster)
 152 {
 153   using simgrid::kernel::routing::ClusterZone;
 154   using simgrid::kernel::routing::DragonflyZone;
 155   using simgrid::kernel::routing::FatTreeZone;
 156   using simgrid::kernel::routing::TorusZone;
 157
 158   int rankId=0;
 159
 160
 161   // What an inventive way of initializing the AS that I have as ancestor :-(
 162   s_sg_platf_AS_cbarg_t AS;
 163   AS.id = cluster->id;
 164   switch (cluster->topology) {
 165   case SURF_CLUSTER_TORUS:
 166     AS.routing = A_surfxml_AS_routing_ClusterTorus;
 167     break;
 168   case SURF_CLUSTER_DRAGONFLY:
 169     AS.routing = A_surfxml_AS_routing_ClusterDragonfly;
 170     break;
 171   case SURF_CLUSTER_FAT_TREE:
 172     AS.routing = A_surfxml_AS_routing_ClusterFatTree;
 173     break;
 174   default:
 175     AS.routing = A_surfxml_AS_routing_Cluster;
 176     break;
 177   }
 178   sg_platf_new_AS_begin(&AS);
 179   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
 180   current_as->parse_specific_arguments(cluster);
 181
 182   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 183     current_as->linkCountPerNode_++;
 184     current_as->hasLoopback_ = 1;
 185   }
 186
 187   if(cluster->limiter_link > 0){
 188     current_as->linkCountPerNode_++;
 189     current_as->hasLimiter_ = 1;
 190   }
 191
 192   for (int i : *cluster->radicals) {
 193     char * host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
 194     char * link_id = bprintf("%s_link_%d", cluster->id, i);
 195
 196     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->speeds.front());
 197
 198     s_sg_platf_host_cbarg_t host;
 199     memset(&host, 0, sizeof(host));
 200     host.id = host_id;
 201     if ((cluster->properties != nullptr) && (!xbt_dict_is_empty(cluster->properties))) {
 202       xbt_dict_cursor_t cursor=nullptr;
 203       char *key;
 204       char* data;
 205       host.properties = xbt_dict_new_homogeneous(free);
 206
 207       xbt_dict_foreach(cluster->properties,cursor,key,data) {
 208         xbt_dict_set(host.properties, key, xbt_strdup(data), nullptr);
 209       }
 210       xbt_dict_free(&cluster->properties);
 211     }
 212
 213     host.speed_per_pstate = cluster->speeds;
 214     host.pstate = 0;
 215     host.core_amount = cluster->core_amount;
 216     host.coord = "";
 217     sg_platf_new_host(&host);
 218     XBT_DEBUG("</host>");
 219
 220     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id, cluster->bw, cluster->lat);
 221
 222     // All links are saved in a matrix;
 223     // every row describes a single node; every node may have multiple links.
 224     // the first column may store a link from x to x if p_has_loopback is set
 225     // the second column may store a limiter link if p_has_limiter is set
 226     // other columns are to store one or more link for the node
 227
 228     //add a loopback link
 229     simgrid::surf::LinkImpl* linkUp   = nullptr;
 230     simgrid::surf::LinkImpl* linkDown = nullptr;
 231     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
 232       char *tmp_link = bprintf("%s_loopback", link_id);
 233       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->loopback_bw);
 234
 235       LinkCreationArgs link;
 236       link.id        = tmp_link;
 237       link.bandwidth = cluster->loopback_bw;
 238       link.latency   = cluster->loopback_lat;
 239       link.policy    = SURF_LINK_FATPIPE;
 240       sg_platf_new_link(&link);
 241       linkUp   = simgrid::surf::LinkImpl::byName(tmp_link);
 242       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
 243       free(tmp_link);
 244
 245       auto as_cluster = static_cast<ClusterZone*>(current_as);
 246       as_cluster->privateLinks_.insert({rankId * as_cluster->linkCountPerNode_, {linkUp, linkDown}});
 247     }
 248
 249     //add a limiter link (shared link to account for maximal bandwidth of the node)
 250     linkUp   = nullptr;
 251     linkDown = nullptr;
 252     if(cluster->limiter_link > 0){
 253       char *tmp_link = bprintf("%s_limiter", link_id);
 254       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->limiter_link);
 255
 256       LinkCreationArgs link;
 257       link.id = tmp_link;
 258       link.bandwidth = cluster->limiter_link;
 259       link.latency = 0;
 260       link.policy = SURF_LINK_SHARED;
 261       sg_platf_new_link(&link);
 262       linkUp = linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
 263       free(tmp_link);
 264       current_as->privateLinks_.insert(
 265           {rankId * current_as->linkCountPerNode_ + current_as->hasLoopback_, {linkUp, linkDown}});
 266     }
 267
 268     //call the cluster function that adds the others links
 269     if (cluster->topology == SURF_CLUSTER_FAT_TREE) {
 270       static_cast<FatTreeZone*>(current_as)->addProcessingNode(i);
 271     }
 272     else {
 273       current_as->create_links_for_node(cluster, i, rankId,
 274           rankId*current_as->linkCountPerNode_ + current_as->hasLoopback_ + current_as->hasLimiter_ );
 275     }
 276     xbt_free(link_id);
 277     xbt_free(host_id);
 278     rankId++;
 279   }
 280
 281   // Add a router.
 282   XBT_DEBUG(" ");
 283   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
 284   if (!cluster->router_id || !strcmp(cluster->router_id, "")) {
 285     char* newid         = bprintf("%s%s_router%s", cluster->prefix, cluster->id, cluster->suffix);
 286     current_as->router_ = sg_platf_new_router(newid, NULL);
 287     free(newid);
 288   } else {
 289     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
 290   }
 291
 292   //Make the backbone
 293   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
 294
 295     LinkCreationArgs link;
 296     link.id        = std::string(cluster->id)+ "_backbone";
 297     link.bandwidth = cluster->bb_bw;
 298     link.latency   = cluster->bb_lat;
 299     link.policy    = cluster->bb_sharing_policy;
 300
 301     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
 302     sg_platf_new_link(&link);
 303
 304     routing_cluster_add_backbone(simgrid::surf::LinkImpl::byName(link.id.c_str()));
 305   }
 306
 307   XBT_DEBUG("</AS>");
 308   sg_platf_new_AS_seal();
 309
 310   simgrid::surf::on_cluster(cluster);
 311   delete cluster->radicals;
 312 }
 313
 314 void routing_cluster_add_backbone(simgrid::surf::LinkImpl* bb)
 315 {
 316   simgrid::kernel::routing::ClusterZone* cluster =
 317       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 318
 319   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
 320   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->name());
 321
 322   cluster->backbone_ = bb;
 323   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->name());
 324 }
 325
 326 void sg_platf_new_cabinet(sg_platf_cabinet_cbarg_t cabinet)
 327 {
 328   for (int radical : *cabinet->radicals) {
 329     std::string hostname = std::string(cabinet->prefix) + std::to_string(radical) + std::string(cabinet->suffix);
 330     s_sg_platf_host_cbarg_t host;
 331     memset(&host, 0, sizeof(host));
 332     host.pstate           = 0;
 333     host.core_amount      = 1;
 334     host.id               = hostname.c_str();
 335     host.speed_per_pstate.push_back(cabinet->speed);
 336     sg_platf_new_host(&host);
 337
 338     LinkCreationArgs link;
 339     link.policy    = SURF_LINK_FULLDUPLEX;
 340     link.latency   = cabinet->lat;
 341     link.bandwidth = cabinet->bw;
 342     link.id        = "link_" + hostname;
 343     sg_platf_new_link(&link);
 344
 345     s_sg_platf_host_link_cbarg_t host_link;
 346     memset(&host_link, 0, sizeof(host_link));
 347     host_link.id        = hostname.c_str();
 348     host_link.link_up   = bprintf("link_%s_UP",hostname.c_str());
 349     host_link.link_down = bprintf("link_%s_DOWN",hostname.c_str());
 350     sg_platf_new_hostlink(&host_link);
 351     free((char*)host_link.link_up);
 352     free((char*)host_link.link_down);
 353   }
 354   delete cabinet->radicals;
 355 }
 356
 357 void sg_platf_new_storage(sg_platf_storage_cbarg_t storage)
 358 {
 359   xbt_assert(!xbt_lib_get_or_null(storage_lib, storage->id,ROUTING_STORAGE_LEVEL),
 360                "Refusing to add a second storage named \"%s\"", storage->id);
 361
 362   void* stype = xbt_lib_get_or_null(storage_type_lib, storage->type_id,ROUTING_STORAGE_TYPE_LEVEL);
 363   xbt_assert(stype,"No storage type '%s'", storage->type_id);
 364
 365   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'",
 366       storage->id,
 367       storage->type_id,
 368       storage->content);
 369
 370   xbt_lib_set(storage_lib, storage->id, ROUTING_STORAGE_LEVEL, (void *) xbt_strdup(storage->type_id));
 371
 372   // if storage content is not specified use the content of storage_type if any
 373   if(!strcmp(storage->content,"") && strcmp(((storage_type_t) stype)->content,"")){
 374     storage->content = ((storage_type_t) stype)->content;
 375     storage->content_type = ((storage_type_t) stype)->content_type;
 376     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s) from storage type '%s' ",
 377         storage->id,((storage_type_t) stype)->content_type,
 378         ((storage_type_t) stype)->type_id);
 379   }
 380
 381   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
 382       "\n\t\tmodel '%s' \n\t\tcontent '%s'\n\t\tcontent_type '%s' "
 383       "\n\t\tproperties '%p''\n",
 384       storage->id,
 385       ((storage_type_t) stype)->model,
 386       ((storage_type_t) stype)->type_id,
 387       storage->content,
 388       storage->content_type,
 389     storage->properties);
 390
 391   auto s = surf_storage_model->createStorage(storage->id, ((storage_type_t)stype)->type_id, storage->content,
 392                                              storage->content_type, storage->attach);
 393
 394   if (storage->properties) {
 395     xbt_dict_cursor_t cursor = nullptr;
 396     char *key;
 397     char* data;
 398     xbt_dict_foreach (storage->properties, cursor, key, data)
 399       s->setProperty(key, data);
 400     xbt_dict_free(&storage->properties);
 401   }
 402 }
 403 void sg_platf_new_storage_type(sg_platf_storage_type_cbarg_t storage_type){
 404
 405   xbt_assert(!xbt_lib_get_or_null(storage_type_lib, storage_type->id,ROUTING_STORAGE_TYPE_LEVEL),
 406                "Reading a storage type, processing unit \"%s\" already exists", storage_type->id);
 407
 408   storage_type_t stype = xbt_new0(s_storage_type_t, 1);
 409   stype->model = xbt_strdup(storage_type->model);
 410   stype->properties = storage_type->properties;
 411   stype->content = xbt_strdup(storage_type->content);
 412   stype->content_type = xbt_strdup(storage_type->content_type);
 413   stype->type_id = xbt_strdup(storage_type->id);
 414   stype->size = storage_type->size;
 415   stype->model_properties = storage_type->model_properties;
 416
 417   XBT_DEBUG("ROUTING Create a storage type id '%s' with model '%s', "
 418       "content '%s', and content_type '%s'",
 419       stype->type_id,
 420       stype->model,
 421       storage_type->content,
 422       storage_type->content_type);
 423
 424   xbt_lib_set(storage_type_lib,
 425       stype->type_id,
 426       ROUTING_STORAGE_TYPE_LEVEL,
 427       (void *) stype);
 428 }
 429
 430 void sg_platf_new_mount(sg_platf_mount_cbarg_t mount){
 431   xbt_assert(xbt_lib_get_or_null(storage_lib, mount->storageId, ROUTING_STORAGE_LEVEL),
 432       "Cannot mount non-existent disk \"%s\"", mount->storageId);
 433
 434   XBT_DEBUG("ROUTING Mount '%s' on '%s'",mount->storageId, mount->name);
 435
 436   s_mount_t mnt;
 437   mnt.storage = surf_storage_resource_priv(surf_storage_resource_by_name(mount->storageId));
 438   mnt.name = xbt_strdup(mount->name);
 439
 440   if (mount_list.empty())
 441     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
 442   mount_list.push_back(mnt);
 443 }
 444
 445 void sg_platf_new_route(sg_platf_route_cbarg_t route)
 446 {
 447   routing_get_current()->addRoute(route);
 448 }
 449
 450 void sg_platf_new_bypassRoute(sg_platf_route_cbarg_t bypassRoute)
 451 {
 452   routing_get_current()->addBypassRoute(bypassRoute);
 453 }
 454
 455 void sg_platf_new_process(sg_platf_process_cbarg_t process)
 456 {
 457   sg_host_t host = sg_host_by_name(process->host);
 458   if (!host) {
 459     // The requested host does not exist. Do a nice message to the user
 460     char *tmp = bprintf("Cannot create process '%s': host '%s' does not exist\nExisting hosts: '",process->function, process->host);
 461     xbt_strbuff_t msg = xbt_strbuff_new_from(tmp);
 462     free(tmp);
 463     xbt_dynar_t all_hosts = xbt_dynar_sort_strings(sg_hosts_as_dynar());
 464     simgrid::s4u::Host* host;
 465     unsigned int cursor;
 466     xbt_dynar_foreach(all_hosts,cursor, host) {
 467       xbt_strbuff_append(msg, host->cname());
 468       xbt_strbuff_append(msg,"', '");
 469       if (msg->used > 1024) {
 470         msg->data[msg->used-3]='\0';
 471         msg->used -= 3;
 472
 473         xbt_strbuff_append(msg," ...(list truncated)......");// That will be shortened by 3 chars when existing the loop
 474         break;
 475       }
 476     }
 477     msg->data[msg->used-3]='\0';
 478     xbt_die("%s", msg->data);
 479   }
 480   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(process->function);
 481   xbt_assert(factory, "Function '%s' unknown", process->function);
 482
 483   double start_time = process->start_time;
 484   double kill_time  = process->kill_time;
 485   int auto_restart = process->on_failure == SURF_PROCESS_ON_FAILURE_DIE ? 0 : 1;
 486
 487   std::vector<std::string> args(process->argv, process->argv + process->argc);
 488   std::function<void()> code = factory(std::move(args));
 489
 490   smx_process_arg_t arg = nullptr;
 491
 492   arg = new simgrid::simix::ProcessArg();
 493   arg->name = std::string(process->argv[0]);
 494   arg->code = code;
 495   arg->data = nullptr;
 496   arg->host = host;
 497   arg->kill_time = kill_time;
 498   arg->properties = current_property_set;
 499
 500   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
 501
 502   if (start_time > SIMIX_get_clock()) {
 503
 504     arg = new simgrid::simix::ProcessArg();
 505     arg->name = std::string(process->argv[0]);
 506     arg->code = std::move(code);
 507     arg->data = nullptr;
 508     arg->host = host;
 509     arg->kill_time = kill_time;
 510     arg->properties = current_property_set;
 511
 512     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->cname(), start_time);
 513     SIMIX_timer_set(start_time, [arg, auto_restart]() {
 514       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
 515                                                                 arg->host, arg->properties, nullptr);
 516       if (arg->kill_time >= 0)
 517         simcall_process_set_kill_time(actor, arg->kill_time);
 518       if (auto_restart)
 519         SIMIX_process_auto_restart_set(actor, auto_restart);
 520       delete arg;
 521     });
 522   } else {                      // start_time <= SIMIX_get_clock()
 523     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->cname());
 524
 525     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
 526                                                               current_property_set, nullptr);
 527
 528     /* The actor creation will fail if the host is currently dead, but that's fine */
 529     if (actor != nullptr) {
 530       if (arg->kill_time >= 0)
 531         simcall_process_set_kill_time(actor, arg->kill_time);
 532       if (auto_restart)
 533         SIMIX_process_auto_restart_set(actor, auto_restart);
 534     }
 535   }
 536   current_property_set = nullptr;
 537 }
 538
 539 void sg_platf_new_peer(sg_platf_peer_cbarg_t peer)
 540 {
 541   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
 542   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
 543
 544   std::vector<double> speedPerPstate;
 545   speedPerPstate.push_back(peer->speed);
 546   simgrid::s4u::Host* host = as->createHost(peer->id, &speedPerPstate, 1, nullptr);
 547
 548   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
 549
 550   /* Change from the defaults */
 551   if (peer->state_trace)
 552     host->pimpl_cpu->setStateTrace(peer->state_trace);
 553   if (peer->speed_trace)
 554     host->pimpl_cpu->setSpeedTrace(peer->speed_trace);
 555 }
 556
 557 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
 558
 559 void sg_platf_end() {
 560   simgrid::s4u::onPlatformCreated();
 561 }
 562
 563 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
 564 static void surf_config_models_setup()
 565 {
 566   const char* host_model_name    = xbt_cfg_get_string("host/model");
 567   const char* network_model_name = xbt_cfg_get_string("network/model");
 568   const char* cpu_model_name     = xbt_cfg_get_string("cpu/model");
 569   const char* storage_model_name = xbt_cfg_get_string("storage/model");
 570
 571   /* The compound host model is needed when using non-default net/cpu models */
 572   if ((!xbt_cfg_is_default_value("network/model") || !xbt_cfg_is_default_value("cpu/model")) &&
 573       xbt_cfg_is_default_value("host/model")) {
 574     host_model_name = "compound";
 575     xbt_cfg_set_string("host/model", host_model_name);
 576   }
 577
 578   XBT_DEBUG("host model: %s", host_model_name);
 579   if (!strcmp(host_model_name, "compound")) {
 580     xbt_assert(cpu_model_name, "Set a cpu model to use with the 'compound' host model");
 581     xbt_assert(network_model_name, "Set a network model to use with the 'compound' host model");
 582
 583     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
 584     surf_cpu_model_description[cpu_id].model_init_preparse();
 585
 586     int network_id = find_model_description(surf_network_model_description, network_model_name);
 587     surf_network_model_description[network_id].model_init_preparse();
 588   }
 589
 590   XBT_DEBUG("Call host_model_init");
 591   int host_id = find_model_description(surf_host_model_description, host_model_name);
 592   surf_host_model_description[host_id].model_init_preparse();
 593
 594   XBT_DEBUG("Call vm_model_init");
 595   surf_vm_model_init_HL13();
 596
 597   XBT_DEBUG("Call storage_model_init");
 598   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
 599   surf_storage_model_description[storage_id].model_init_preparse();
 600 }
 601
 602 /**
 603  * \brief Add an AS to the platform
 604  *
 605  * Add a new autonomous system to the platform. Any elements (such as host,
 606  * router or sub-AS) added after this call and before the corresponding call
 607  * to sg_platf_new_AS_seal() will be added to this AS.
 608  *
 609  * Once this function was called, the configuration concerning the used
 610  * models cannot be changed anymore.
 611  *
 612  * @param AS the parameters defining the AS to build.
 613  */
 614 simgrid::s4u::NetZone* sg_platf_new_AS_begin(sg_platf_AS_cbarg_t AS)
 615 {
 616   if (!surf_parse_models_setup_already_called) {
 617     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
 618      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
 619      *
 620      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
 621      * (FIXME: check it out by creating a file beginning with one of these tags)
 622      * but cluster and peer create ASes internally, so putting the code in there is ok.
 623      */
 624     surf_parse_models_setup_already_called = 1;
 625     surf_config_models_setup();
 626   }
 627
 628   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
 629                             * any further config now that we created some real content */
 630
 631
 632   /* search the routing model */
 633   simgrid::kernel::routing::NetZoneImpl* new_as = nullptr;
 634   switch(AS->routing){
 635     case A_surfxml_AS_routing_Cluster:
 636       new_as = new simgrid::kernel::routing::ClusterZone(current_routing, AS->id);
 637       break;
 638     case A_surfxml_AS_routing_ClusterDragonfly:
 639       new_as = new simgrid::kernel::routing::DragonflyZone(current_routing, AS->id);
 640       break;
 641     case A_surfxml_AS_routing_ClusterTorus:
 642       new_as = new simgrid::kernel::routing::TorusZone(current_routing, AS->id);
 643       break;
 644     case A_surfxml_AS_routing_ClusterFatTree:
 645       new_as = new simgrid::kernel::routing::FatTreeZone(current_routing, AS->id);
 646       break;
 647     case A_surfxml_AS_routing_Dijkstra:
 648       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 0);
 649       break;
 650     case A_surfxml_AS_routing_DijkstraCache:
 651       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 1);
 652       break;
 653     case A_surfxml_AS_routing_Floyd:
 654       new_as = new simgrid::kernel::routing::FloydZone(current_routing, AS->id);
 655       break;
 656     case A_surfxml_AS_routing_Full:
 657       new_as = new simgrid::kernel::routing::FullZone(current_routing, AS->id);
 658       break;
 659     case A_surfxml_AS_routing_None:
 660       new_as = new simgrid::kernel::routing::EmptyZone(current_routing, AS->id);
 661       break;
 662     case A_surfxml_AS_routing_Vivaldi:
 663       new_as = new simgrid::kernel::routing::VivaldiZone(current_routing, AS->id);
 664       break;
 665     default:
 666       xbt_die("Not a valid model!");
 667       break;
 668   }
 669
 670   if (current_routing == nullptr) { /* it is the first one */
 671     xbt_assert(simgrid::s4u::Engine::instance()->pimpl->netRoot_ == nullptr,
 672                "All defined components must belong to a AS");
 673     simgrid::s4u::Engine::instance()->pimpl->netRoot_ = new_as;
 674
 675   } else {
 676     /* set the father behavior */
 677     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
 678       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
 679     /* add to the sons dictionary */
 680     current_routing->children()->push_back(static_cast<simgrid::s4u::NetZone*>(new_as));
 681   }
 682
 683   /* set the new current component of the tree */
 684   current_routing = new_as;
 685
 686   if (TRACE_is_enabled())
 687     sg_instr_AS_begin(AS);
 688
 689   return new_as;
 690 }
 691
 692 /**
 693  * \brief Specify that the description of the current AS is finished
 694  *
 695  * Once you've declared all the content of your AS, you have to seal
 696  * it with this call. Your AS is not usable until you call this function.
 697  */
 698 void sg_platf_new_AS_seal()
 699 {
 700   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
 701   current_routing->seal();
 702   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->father());
 703
 704   if (TRACE_is_enabled())
 705     sg_instr_AS_end();
 706 }
 707
 708 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
 709 void sg_platf_new_hostlink(sg_platf_host_link_cbarg_t hostlink)
 710 {
 711   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id)->pimpl_netpoint;
 712   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id);
 713   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
 714              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
 715
 716   simgrid::surf::LinkImpl* linkUp   = simgrid::surf::LinkImpl::byName(hostlink->link_up);
 717   simgrid::surf::LinkImpl* linkDown = simgrid::surf::LinkImpl::byName(hostlink->link_down);
 718
 719   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up);
 720   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down);
 721
 722   auto as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
 723
 724   if (as_cluster->privateLinks_.find(netpoint->id()) != as_cluster->privateLinks_.end())
 725     surf_parse_error("Host_link for '%s' is already defined!",hostlink->id);
 726
 727   XBT_DEBUG("Push Host_link for host '%s' to position %d", netpoint->cname(), netpoint->id());
 728   as_cluster->privateLinks_.insert({netpoint->id(), {linkUp, linkDown}});
 729 }
 730
 731 void sg_platf_new_trace(sg_platf_trace_cbarg_t trace)
 732 {
 733   tmgr_trace_t tmgr_trace;
 734   if (trace->file && strcmp(trace->file, "") != 0) {
 735     tmgr_trace = tmgr_trace_new_from_file(trace->file);
 736   } else {
 737     xbt_assert(strcmp(trace->pc_data, ""),
 738         "Trace '%s' must have either a content, or point to a file on disk.",trace->id);
 739     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
 740   }
 741   xbt_dict_set(traces_set_list, trace->id, static_cast<void*>(tmgr_trace), nullptr);
 742 }