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[simgrid.git] / 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_private.hpp"
23 #include "src/surf/HostImpl.hpp"
24 #include "src/surf/xml/platf_private.hpp"
25
26 #include <string>
27
28 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
29
30 XBT_PRIVATE std::map<std::string, simgrid::kernel::resource::StorageImpl*> mount_list;
31 XBT_PRIVATE std::vector<std::string> known_storages;
32
33 namespace simgrid {
34 namespace surf {
35
36 simgrid::xbt::signal<void(kernel::routing::ClusterCreationArgs const&)> on_cluster;
37 }
38 }
39
40 static int surf_parse_models_setup_already_called = 0;
41 std::map<std::string, simgrid::kernel::resource::StorageType*> storage_types;
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   simgrid::s4u::on_platform_created.connect(check_disk_attachment);
54 }
55
56 /** Module management function: frees all internal data structures */
57 void sg_platf_exit() {
58   simgrid::surf::on_cluster.disconnect_slots();
59   simgrid::s4u::on_platform_created.disconnect_slots();
60
61   /* make sure that we will reinit the models while loading the platf once reinited */
62   surf_parse_models_setup_already_called = 0;
63   surf_parse_lex_destroy();
64 }
65
66 /** @brief Add a host to the current AS */
67 void sg_platf_new_host(simgrid::kernel::routing::HostCreationArgs* args)
68 {
69   std::map<std::string, std::string> props;
70   if (args->properties) {
71     for (auto const& elm : *args->properties)
72       props.insert({elm.first, elm.second});
73     delete args->properties;
74   }
75
76   simgrid::s4u::Host* host =
77       routing_get_current()->create_host(args->id, args->speed_per_pstate, args->core_amount, &props);
78
79   host->pimpl_->storage_ = mount_list;
80   mount_list.clear();
81
82   /* Change from the defaults */
83   if (args->state_trace)
84     host->pimpl_cpu->set_state_profile(args->state_trace);
85   if (args->speed_trace)
86     host->pimpl_cpu->set_speed_profile(args->speed_trace);
87   if (args->pstate != 0)
88     host->pimpl_cpu->set_pstate(args->pstate);
89   if (not args->coord.empty())
90     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
91 }
92
93 /** @brief Add a "router" to the network element list */
94 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const std::string& name, const char* coords)
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::get_instance()->netpoint_by_name_or_null(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", netpoint->get_cname(), 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 static void sg_platf_new_link(simgrid::kernel::routing::LinkCreationArgs* link, const std::string& link_name)
113 {
114   simgrid::kernel::resource::LinkImpl* l =
115       surf_network_model->create_link(link_name, link->bandwidth, link->latency, link->policy);
116
117   if (link->properties) {
118     l->set_properties(*link->properties);
119   }
120
121   if (link->latency_trace)
122     l->set_latency_profile(link->latency_trace);
123   if (link->bandwidth_trace)
124     l->set_bandwidth_profile(link->bandwidth_trace);
125   if (link->state_trace)
126     l->set_state_profile(link->state_trace);
127 }
128
129 void sg_platf_new_link(simgrid::kernel::routing::LinkCreationArgs* link)
130 {
131   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
132     sg_platf_new_link(link, link->id + "_UP");
133     sg_platf_new_link(link, link->id + "_DOWN");
134   } else {
135     sg_platf_new_link(link, link->id);
136   }
137   delete link->properties;
138 }
139
140 void sg_platf_new_cluster(simgrid::kernel::routing::ClusterCreationArgs* cluster)
141 {
142   using simgrid::kernel::routing::ClusterZone;
143   using simgrid::kernel::routing::DragonflyZone;
144   using simgrid::kernel::routing::FatTreeZone;
145   using simgrid::kernel::routing::TorusZone;
146
147   int rankId=0;
148
149   // What an inventive way of initializing the AS that I have as ancestor :-(
150   simgrid::kernel::routing::ZoneCreationArgs zone;
151   zone.id = cluster->id;
152   switch (cluster->topology) {
153     case simgrid::kernel::routing::ClusterTopology::TORUS:
154       zone.routing = A_surfxml_AS_routing_ClusterTorus;
155       break;
156     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
157       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
158       break;
159     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
160       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
161       break;
162     default:
163       zone.routing = A_surfxml_AS_routing_Cluster;
164       break;
165   }
166   sg_platf_new_Zone_begin(&zone);
167   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
168   current_as->parse_specific_arguments(cluster);
169
170   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
171     current_as->num_links_per_node_++;
172     current_as->has_loopback_ = true;
173   }
174
175   if(cluster->limiter_link > 0){
176     current_as->num_links_per_node_++;
177     current_as->has_limiter_ = true;
178   }
179
180   for (int const& i : *cluster->radicals) {
181     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
182     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
183
184     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
185
186     simgrid::kernel::routing::HostCreationArgs host;
187     host.id = host_id.c_str();
188     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
189       host.properties = new std::unordered_map<std::string, std::string>;
190
191       for (auto const& elm : *cluster->properties)
192         host.properties->insert({elm.first, elm.second});
193     }
194
195     host.speed_per_pstate = cluster->speeds;
196     host.pstate = 0;
197     host.core_amount = cluster->core_amount;
198     host.coord = "";
199     sg_platf_new_host(&host);
200     XBT_DEBUG("</host>");
201
202     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
203
204     // All links are saved in a matrix;
205     // every row describes a single node; every node may have multiple links.
206     // the first column may store a link from x to x if p_has_loopback is set
207     // the second column may store a limiter link if p_has_limiter is set
208     // other columns are to store one or more link for the node
209
210     //add a loopback link
211     simgrid::s4u::Link* linkUp   = nullptr;
212     simgrid::s4u::Link* linkDown = nullptr;
213     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
214       std::string tmp_link = link_id + "_loopback";
215       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
216
217       simgrid::kernel::routing::LinkCreationArgs link;
218       link.id        = tmp_link;
219       link.bandwidth = cluster->loopback_bw;
220       link.latency   = cluster->loopback_lat;
221       link.policy    = simgrid::s4u::Link::SharingPolicy::FATPIPE;
222       sg_platf_new_link(&link);
223       linkUp   = simgrid::s4u::Link::by_name_or_null(tmp_link);
224       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
225
226       auto* as_cluster = static_cast<ClusterZone*>(current_as);
227       as_cluster->private_links_.insert({as_cluster->node_pos(rankId), {linkUp->get_impl(), linkDown->get_impl()}});
228     }
229
230     //add a limiter link (shared link to account for maximal bandwidth of the node)
231     linkUp   = nullptr;
232     linkDown = nullptr;
233     if(cluster->limiter_link > 0){
234       std::string tmp_link = std::string(link_id) + "_limiter";
235       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
236
237       simgrid::kernel::routing::LinkCreationArgs link;
238       link.id        = tmp_link;
239       link.bandwidth = cluster->limiter_link;
240       link.latency = 0;
241       link.policy    = simgrid::s4u::Link::SharingPolicy::SHARED;
242       sg_platf_new_link(&link);
243       linkDown = simgrid::s4u::Link::by_name_or_null(tmp_link);
244       linkUp   = linkDown;
245       current_as->private_links_.insert(
246           {current_as->node_pos_with_loopback(rankId), {linkUp->get_impl(), linkDown->get_impl()}});
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::s4u::Link::by_name(link.id)->get_impl());
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::kernel::resource::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     s->set_properties(*storage->properties);
365     delete storage->properties;
366   }
367 }
368
369 void sg_platf_new_storage_type(simgrid::kernel::routing::StorageTypeCreationArgs* storage_type)
370 {
371   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
372              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
373
374   simgrid::kernel::resource::StorageType* stype = new simgrid::kernel::resource::StorageType(
375       storage_type->id, storage_type->model, storage_type->content, storage_type->properties,
376       storage_type->model_properties, storage_type->size);
377
378   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
379             storage_type->model.c_str(), storage_type->content.c_str());
380
381   storage_types[storage_type->id] = stype;
382 }
383
384 void sg_platf_new_mount(simgrid::kernel::routing::MountCreationArgs* mount)
385 {
386   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
387              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
388
389   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
390
391   if (mount_list.empty())
392     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
393   mount_list.insert({mount->name, simgrid::s4u::Engine::get_instance()->storage_by_name(mount->storageId)->get_impl()});
394 }
395
396 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
397 {
398   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
399                                    route->symmetrical);
400 }
401
402 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
403 {
404   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
405                                           bypassRoute->link_list, bypassRoute->symmetrical);
406 }
407
408 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
409 {
410   sg_host_t host = sg_host_by_name(actor->host);
411   if (not host) {
412     // The requested host does not exist. Do a nice message to the user
413     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
414                       "' does not exist\nExisting hosts: '";
415
416     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
417
418     for (auto const& some_host : list) {
419       msg += some_host->get_name();
420       msg += "', '";
421       if (msg.length() > 1024) {
422         msg.pop_back(); // remove trailing quote
423         msg += "...(list truncated)......";
424         break;
425       }
426     }
427     xbt_die("%s", msg.c_str());
428   }
429   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
430   xbt_assert(factory, "Error while creating an actor from the XML file: Function '%s' not registered", actor->function);
431
432   double start_time = actor->start_time;
433   double kill_time  = actor->kill_time;
434   bool auto_restart = actor->on_failure != simgrid::kernel::routing::ActorOnFailure::DIE;
435
436   std::string actor_name     = actor->args[0];
437   simgrid::simix::ActorCode code = factory(std::move(actor->args));
438   std::shared_ptr<std::unordered_map<std::string, std::string>> properties(actor->properties);
439
440   simgrid::kernel::actor::ProcessArg* arg =
441       new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
442
443   host->pimpl_->actors_at_boot_.emplace_back(arg);
444
445   if (start_time > SIMIX_get_clock()) {
446
447     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
448
449     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
450     simgrid::simix::Timer::set(start_time, [arg, auto_restart]() {
451       simgrid::kernel::actor::ActorImplPtr new_actor = simgrid::kernel::actor::ActorImpl::create(
452           arg->name.c_str(), std::move(arg->code), arg->data, arg->host, arg->properties.get(), nullptr);
453       if (arg->kill_time >= 0)
454         new_actor->set_kill_time(arg->kill_time);
455       if (auto_restart)
456         new_actor->set_auto_restart(auto_restart);
457       delete arg;
458     });
459   } else {                      // start_time <= SIMIX_get_clock()
460     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
461
462     try {
463       simgrid::kernel::actor::ActorImplPtr new_actor = nullptr;
464       new_actor = simgrid::kernel::actor::ActorImpl::create(arg->name.c_str(), std::move(code), nullptr, host,
465                                                             arg->properties.get(), nullptr);
466       /* The actor creation will fail if the host is currently dead, but that's fine */
467       if (arg->kill_time >= 0)
468         new_actor->set_kill_time(arg->kill_time);
469       if (auto_restart)
470         new_actor->set_auto_restart(auto_restart);
471     } catch (simgrid::HostFailureException const&) {
472       XBT_WARN("Deployment includes some initially turned off Hosts ... nevermind.");
473     }
474   }
475 }
476
477 void sg_platf_new_peer(simgrid::kernel::routing::PeerCreationArgs* peer)
478 {
479   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
480   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
481
482   std::vector<double> speed_per_pstate;
483   speed_per_pstate.push_back(peer->speed);
484   simgrid::s4u::Host* host = as->create_host(peer->id.c_str(), speed_per_pstate, 1, nullptr);
485
486   as->set_peer_link(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
487
488   /* Change from the defaults */
489   if (peer->state_trace)
490     host->pimpl_cpu->set_state_profile(peer->state_trace);
491   if (peer->speed_trace)
492     host->pimpl_cpu->set_speed_profile(peer->speed_trace);
493 }
494
495 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
496 static void surf_config_models_setup()
497 {
498   std::string host_model_name    = simgrid::config::get_value<std::string>("host/model");
499   std::string network_model_name = simgrid::config::get_value<std::string>("network/model");
500   std::string cpu_model_name     = simgrid::config::get_value<std::string>("cpu/model");
501   std::string storage_model_name = simgrid::config::get_value<std::string>("storage/model");
502
503   /* The compound host model is needed when using non-default net/cpu models */
504   if ((not simgrid::config::is_default("network/model") || not simgrid::config::is_default("cpu/model")) &&
505       simgrid::config::is_default("host/model")) {
506     host_model_name = "compound";
507     simgrid::config::set_value("host/model", host_model_name);
508   }
509
510   XBT_DEBUG("host model: %s", host_model_name.c_str());
511   if (host_model_name == "compound") {
512     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
513     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
514
515     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
516     surf_cpu_model_description[cpu_id].model_init_preparse();
517
518     int network_id = find_model_description(surf_network_model_description, network_model_name);
519     surf_network_model_description[network_id].model_init_preparse();
520   }
521
522   XBT_DEBUG("Call host_model_init");
523   int host_id = find_model_description(surf_host_model_description, host_model_name);
524   surf_host_model_description[host_id].model_init_preparse();
525
526   XBT_DEBUG("Call vm_model_init");
527   surf_vm_model_init_HL13();
528
529   XBT_DEBUG("Call storage_model_init");
530   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
531   surf_storage_model_description[storage_id].model_init_preparse();
532 }
533
534 /**
535  * @brief Add a Zone to the platform
536  *
537  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
538  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
539  *
540  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
541  *
542  * @param zone the parameters defining the Zone to build.
543  */
544 simgrid::kernel::routing::NetZoneImpl* sg_platf_new_Zone_begin(simgrid::kernel::routing::ZoneCreationArgs* zone)
545 {
546   if (not surf_parse_models_setup_already_called) {
547     simgrid::s4u::on_platform_creation();
548
549     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
550      * That is, after the last <config> tag, if any, and before the first of cluster|peer|zone|trace|trace_connect
551      *
552      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
553      * (FIXME: check it out by creating a file beginning with one of these tags)
554      * but cluster and peer come down to zone creations, so putting this verification here is correct.
555      */
556     surf_parse_models_setup_already_called = 1;
557     surf_config_models_setup();
558   }
559
560   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
561                             * any further config now that we created some real content */
562
563   /* search the routing model */
564   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
565   simgrid::kernel::resource::NetworkModel* netmodel =
566       current_routing == nullptr ? surf_network_model : current_routing->network_model_;
567   switch (zone->routing) {
568     case A_surfxml_AS_routing_Cluster:
569       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id, netmodel);
570       break;
571     case A_surfxml_AS_routing_ClusterDragonfly:
572       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id, netmodel);
573       break;
574     case A_surfxml_AS_routing_ClusterTorus:
575       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id, netmodel);
576       break;
577     case A_surfxml_AS_routing_ClusterFatTree:
578       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id, netmodel);
579       break;
580     case A_surfxml_AS_routing_Dijkstra:
581       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, netmodel, false);
582       break;
583     case A_surfxml_AS_routing_DijkstraCache:
584       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, netmodel, true);
585       break;
586     case A_surfxml_AS_routing_Floyd:
587       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id, netmodel);
588       break;
589     case A_surfxml_AS_routing_Full:
590       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id, netmodel);
591       break;
592     case A_surfxml_AS_routing_None:
593       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id, netmodel);
594       break;
595     case A_surfxml_AS_routing_Vivaldi:
596       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id, netmodel);
597       break;
598     default:
599       xbt_die("Not a valid model!");
600       break;
601   }
602
603   if (current_routing == nullptr) { /* it is the first one */
604     simgrid::s4u::Engine::get_instance()->set_netzone_root(new_zone->get_iface());
605   } else {
606     /* set the father behavior */
607     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
608       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
609     /* add to the sons dictionary */
610     current_routing->get_children()->push_back(new_zone);
611   }
612
613   /* set the new current component of the tree */
614   current_routing = new_zone;
615   simgrid::s4u::NetZone::on_creation(*new_zone->get_iface()); // notify the signal
616
617   return new_zone;
618 }
619
620 /**
621  * @brief Specify that the description of the current AS is finished
622  *
623  * Once you've declared all the content of your AS, you have to seal
624  * it with this call. Your AS is not usable until you call this function.
625  */
626 void sg_platf_new_Zone_seal()
627 {
628   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
629   current_routing->seal();
630   simgrid::s4u::NetZone::on_seal(*current_routing->get_iface());
631   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->get_father());
632 }
633
634 /** @brief Add a link connecting a host to the rest of its AS (which must be cluster or vivaldi) */
635 void sg_platf_new_hostlink(simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
636 {
637   simgrid::kernel::routing::NetPoint* netpoint = simgrid::s4u::Host::by_name(hostlink->id)->pimpl_netpoint;
638   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
639   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
640              "Only hosts from Cluster and Vivaldi ASes can get a host_link.");
641
642   simgrid::s4u::Link* linkUp   = simgrid::s4u::Link::by_name_or_null(hostlink->link_up);
643   simgrid::s4u::Link* linkDown = simgrid::s4u::Link::by_name_or_null(hostlink->link_down);
644
645   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
646   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
647
648   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
649
650   if (as_cluster->private_links_.find(netpoint->id()) != as_cluster->private_links_.end())
651     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
652
653   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
654   as_cluster->private_links_.insert({netpoint->id(), {linkUp->get_impl(), linkDown->get_impl()}});
655 }
656
657 void sg_platf_new_trace(simgrid::kernel::routing::ProfileCreationArgs* profile)
658 {
659   simgrid::kernel::profile::Profile* mgr_profile;
660   if (not profile->file.empty()) {
661     mgr_profile = simgrid::kernel::profile::Profile::from_file(profile->file);
662   } else {
663     xbt_assert(not profile->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
664                profile->id.c_str());
665     mgr_profile = simgrid::kernel::profile::Profile::from_string(profile->id, profile->pc_data, profile->periodicity);
666   }
667   traces_set_list.insert({profile->id, mgr_profile});
668 }