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[simgrid.git] / 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/s4u/Engine.hpp"
7 #include "simgrid/s4u/Storage.hpp"
8
9 #include "src/kernel/EngineImpl.hpp"
10 #include "src/simix/smx_private.hpp"
11
12 #include "src/include/simgrid/sg_config.h"
13
14 #include "src/surf/HostImpl.hpp"
15 #include "src/surf/cpu_interface.hpp"
16 #include "src/surf/network_interface.hpp"
17
18 #include "simgrid/kernel/routing/ClusterZone.hpp"
19 #include "simgrid/kernel/routing/DijkstraZone.hpp"
20 #include "simgrid/kernel/routing/DragonflyZone.hpp"
21 #include "simgrid/kernel/routing/EmptyZone.hpp"
22 #include "simgrid/kernel/routing/FatTreeZone.hpp"
23 #include "simgrid/kernel/routing/FloydZone.hpp"
24 #include "simgrid/kernel/routing/FullZone.hpp"
25 #include "simgrid/kernel/routing/NetPoint.hpp"
26 #include "simgrid/kernel/routing/TorusZone.hpp"
27 #include "simgrid/kernel/routing/VivaldiZone.hpp"
28 #include "src/kernel/routing/NetZoneImpl.hpp"
29 #include <string>
30 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
31
32 XBT_PRIVATE std::map<std::string, simgrid::surf::StorageImpl*> mount_list;
33 XBT_PRIVATE std::vector<std::string> known_storages;
34
35 namespace simgrid {
36 namespace surf {
37
38 simgrid::xbt::signal<void(ClusterCreationArgs*)> on_cluster;
39 }
40 }
41
42 static int surf_parse_models_setup_already_called = 0;
43 std::map<std::string, simgrid::surf::StorageType*> storage_types;
44
45 /** The current AS in the parsing */
46 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
47 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
48 {
49   return current_routing;
50 }
51
52 /** Module management function: creates all internal data structures */
53 void sg_platf_init()
54 { /* Do nothing: just for symmetry of user code */
55 }
56
57 /** Module management function: frees all internal data structures */
58 void sg_platf_exit() {
59   simgrid::surf::on_cluster.disconnectSlots();
60   simgrid::s4u::onPlatformCreated.disconnectSlots();
61
62   /* make sure that we will reinit the models while loading the platf once reinited */
63   surf_parse_models_setup_already_called = 0;
64   surf_parse_lex_destroy();
65 }
66
67 /** @brief Add an host to the current AS */
68 void sg_platf_new_host(sg_platf_host_cbarg_t args)
69 {
70   std::map<std::string, std::string> props;
71   if (args->properties) {
72     for (auto const& elm : *args->properties)
73       props.insert({elm.first, elm.second});
74     delete args->properties;
75   }
76
77   simgrid::s4u::Host* host =
78       routing_get_current()->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
94 /** @brief Add a "router" to the network element list */
95 simgrid::kernel::routing::NetPoint* sg_platf_new_router(std::string name, const char* coords)
96 {
97   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
98
99   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
100     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
101   xbt_assert(nullptr == simgrid::s4u::Engine::getInstance()->getNetpointByNameOrNull(name),
102              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
103
104   simgrid::kernel::routing::NetPoint* netpoint =
105       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
106   XBT_DEBUG("Router '%s' has the id %u", name.c_str(), netpoint->id());
107
108   if (coords && strcmp(coords, ""))
109     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
110
111
112   return netpoint;
113 }
114
115 void sg_platf_new_link(LinkCreationArgs* link)
116 {
117   std::vector<std::string> names;
118
119   if (link->policy == SURF_LINK_SPLITDUPLEX) {
120     names.push_back(link->id+ "_UP");
121     names.push_back(link->id+ "_DOWN");
122   } else {
123     names.push_back(link->id);
124   }
125   for (auto const& link_name : names) {
126     simgrid::surf::LinkImpl* l =
127         surf_network_model->createLink(link_name, link->bandwidth, link->latency, link->policy);
128
129     if (link->properties) {
130       for (auto const& elm : *link->properties)
131         l->setProperty(elm.first, elm.second);
132     }
133
134     if (link->latency_trace)
135       l->setLatencyTrace(link->latency_trace);
136     if (link->bandwidth_trace)
137       l->setBandwidthTrace(link->bandwidth_trace);
138     if (link->state_trace)
139       l->setStateTrace(link->state_trace);
140   }
141   delete link->properties;
142 }
143
144 void sg_platf_new_cluster(ClusterCreationArgs* cluster)
145 {
146   using simgrid::kernel::routing::ClusterZone;
147   using simgrid::kernel::routing::DragonflyZone;
148   using simgrid::kernel::routing::FatTreeZone;
149   using simgrid::kernel::routing::TorusZone;
150
151   int rankId=0;
152
153   // What an inventive way of initializing the AS that I have as ancestor :-(
154   ZoneCreationArgs zone;
155   zone.id = cluster->id;
156   switch (cluster->topology) {
157     case ClusterTopology::TORUS:
158       zone.routing = A_surfxml_AS_routing_ClusterTorus;
159       break;
160     case ClusterTopology::DRAGONFLY:
161       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
162       break;
163     case ClusterTopology::FAT_TREE:
164       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
165       break;
166     default:
167       zone.routing = A_surfxml_AS_routing_Cluster;
168       break;
169   }
170   sg_platf_new_Zone_begin(&zone);
171   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
172   current_as->parse_specific_arguments(cluster);
173
174   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
175     current_as->linkCountPerNode_++;
176     current_as->hasLoopback_ = true;
177   }
178
179   if(cluster->limiter_link > 0){
180     current_as->linkCountPerNode_++;
181     current_as->hasLimiter_ = true;
182   }
183
184   for (int const& i : *cluster->radicals) {
185     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
186     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
187
188     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
189
190     s_sg_platf_host_cbarg_t host;
191     host.id = host_id.c_str();
192     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
193       host.properties = new std::map<std::string, std::string>;
194
195       for (auto const& elm : *cluster->properties)
196         host.properties->insert({elm.first, elm.second});
197     }
198
199     host.speed_per_pstate = cluster->speeds;
200     host.pstate = 0;
201     host.core_amount = cluster->core_amount;
202     host.coord = "";
203     sg_platf_new_host(&host);
204     XBT_DEBUG("</host>");
205
206     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
207
208     // All links are saved in a matrix;
209     // every row describes a single node; every node may have multiple links.
210     // the first column may store a link from x to x if p_has_loopback is set
211     // the second column may store a limiter link if p_has_limiter is set
212     // other columns are to store one or more link for the node
213
214     //add a loopback link
215     simgrid::surf::LinkImpl* linkUp   = nullptr;
216     simgrid::surf::LinkImpl* linkDown = nullptr;
217     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
218       std::string tmp_link = link_id + "_loopback";
219       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
220
221       LinkCreationArgs link;
222       link.id        = tmp_link;
223       link.bandwidth = cluster->loopback_bw;
224       link.latency   = cluster->loopback_lat;
225       link.policy    = SURF_LINK_FATPIPE;
226       sg_platf_new_link(&link);
227       linkUp   = simgrid::surf::LinkImpl::byName(tmp_link);
228       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
229
230       auto* as_cluster = static_cast<ClusterZone*>(current_as);
231       as_cluster->privateLinks_.insert({as_cluster->nodePosition(rankId), {linkUp, linkDown}});
232     }
233
234     //add a limiter link (shared link to account for maximal bandwidth of the node)
235     linkUp   = nullptr;
236     linkDown = nullptr;
237     if(cluster->limiter_link > 0){
238       std::string tmp_link = std::string(link_id) + "_limiter";
239       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
240
241       LinkCreationArgs link;
242       link.id        = tmp_link;
243       link.bandwidth = cluster->limiter_link;
244       link.latency = 0;
245       link.policy = SURF_LINK_SHARED;
246       sg_platf_new_link(&link);
247       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
248       linkUp   = linkDown;
249       current_as->privateLinks_.insert({current_as->nodePositionWithLoopback(rankId), {linkUp, linkDown}});
250     }
251
252     //call the cluster function that adds the others links
253     if (cluster->topology == ClusterTopology::FAT_TREE) {
254       static_cast<FatTreeZone*>(current_as)->addProcessingNode(i);
255     } else {
256       current_as->create_links_for_node(cluster, i, rankId, current_as->nodePositionWithLimiter(rankId));
257     }
258     rankId++;
259   }
260   delete cluster->properties;
261
262   // Add a router.
263   XBT_DEBUG(" ");
264   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
265   if (cluster->router_id.empty()) {
266     std::string newid   = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
267     current_as->router_ = sg_platf_new_router(newid, NULL);
268   } else {
269     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
270   }
271
272   //Make the backbone
273   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
274
275     LinkCreationArgs link;
276     link.id        = std::string(cluster->id)+ "_backbone";
277     link.bandwidth = cluster->bb_bw;
278     link.latency   = cluster->bb_lat;
279     link.policy    = cluster->bb_sharing_policy;
280
281     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
282     sg_platf_new_link(&link);
283
284     routing_cluster_add_backbone(simgrid::surf::LinkImpl::byName(link.id));
285   }
286
287   XBT_DEBUG("</AS>");
288   sg_platf_new_Zone_seal();
289
290   simgrid::surf::on_cluster(cluster);
291   delete cluster->radicals;
292 }
293
294 void routing_cluster_add_backbone(simgrid::surf::LinkImpl* bb)
295 {
296   simgrid::kernel::routing::ClusterZone* cluster =
297       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
298
299   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
300   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->getCname());
301
302   cluster->backbone_ = bb;
303   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->getCname());
304 }
305
306 void sg_platf_new_cabinet(CabinetCreationArgs* cabinet)
307 {
308   for (int const& radical : *cabinet->radicals) {
309     std::string hostname = cabinet->prefix + std::to_string(radical) + cabinet->suffix;
310     s_sg_platf_host_cbarg_t host;
311     host.pstate           = 0;
312     host.core_amount      = 1;
313     host.id               = hostname.c_str();
314     host.speed_per_pstate.push_back(cabinet->speed);
315     sg_platf_new_host(&host);
316
317     LinkCreationArgs link;
318     link.policy    = SURF_LINK_SPLITDUPLEX;
319     link.latency   = cabinet->lat;
320     link.bandwidth = cabinet->bw;
321     link.id        = "link_" + hostname;
322     sg_platf_new_link(&link);
323
324     HostLinkCreationArgs host_link;
325     host_link.id        = hostname;
326     host_link.link_up   = std::string("link_") + hostname + "_UP";
327     host_link.link_down = std::string("link_") + hostname + "_DOWN";
328     sg_platf_new_hostlink(&host_link);
329   }
330   delete cabinet->radicals;
331 }
332
333 void sg_platf_new_storage(StorageCreationArgs* storage)
334 {
335   xbt_assert(std::find(known_storages.begin(), known_storages.end(), storage->id) == known_storages.end(),
336              "Refusing to add a second storage named \"%s\"", storage->id.c_str());
337
338   simgrid::surf::StorageType* stype;
339   auto st = storage_types.find(storage->type_id);
340   if (st != storage_types.end()) {
341     stype = st->second;
342   } else {
343     xbt_die("No storage type '%s'", storage->type_id.c_str());
344   }
345
346   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id.c_str(),
347             storage->type_id.c_str(), storage->content.c_str());
348
349   known_storages.push_back(storage->id);
350
351   // if storage content is not specified use the content of storage_type if any
352   if (storage->content.empty() && not stype->content.empty()) {
353     storage->content = stype->content;
354     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s)", storage->id.c_str(),
355               stype->id.c_str());
356   }
357
358   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
359             "\n\t\tmodel '%s' \n\t\tcontent '%s' "
360             "\n\t\tproperties '%p''\n",
361             storage->id.c_str(), stype->model.c_str(), stype->id.c_str(), storage->content.c_str(),
362             storage->properties);
363
364   auto s = surf_storage_model->createStorage(storage->id, stype->id, storage->content, storage->attach);
365
366   if (storage->properties) {
367     for (auto const& elm : *storage->properties)
368       s->setProperty(elm.first, elm.second);
369     delete storage->properties;
370   }
371 }
372
373 void sg_platf_new_storage_type(StorageTypeCreationArgs* storage_type)
374 {
375   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
376              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
377
378   simgrid::surf::StorageType* stype =
379       new simgrid::surf::StorageType(storage_type->id, storage_type->model, storage_type->content,
380                                      storage_type->properties, storage_type->model_properties, storage_type->size);
381
382   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
383             storage_type->model.c_str(), storage_type->content.c_str());
384
385   storage_types[storage_type->id] = stype;
386 }
387
388 void sg_platf_new_mount(MountCreationArgs* mount)
389 {
390   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
391              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
392
393   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
394
395   if (mount_list.empty())
396     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
397   mount_list.insert({mount->name, simgrid::s4u::Engine::getInstance()->storageByName(mount->storageId)->getImpl()});
398 }
399
400 void sg_platf_new_route(RouteCreationArgs* route)
401 {
402   routing_get_current()->addRoute(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
403                                   route->symmetrical);
404 }
405
406 void sg_platf_new_bypassRoute(RouteCreationArgs* bypassRoute)
407 {
408   routing_get_current()->addBypassRoute(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
409                                         bypassRoute->link_list, bypassRoute->symmetrical);
410 }
411
412 void sg_platf_new_actor(ActorCreationArgs* actor)
413 {
414   sg_host_t host = sg_host_by_name(actor->host);
415   if (not host) {
416     // The requested host does not exist. Do a nice message to the user
417     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
418                       "' does not exist\nExisting hosts: '";
419
420     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::getInstance()->getAllHosts();
421
422     for (auto const& host : list) {
423       msg += host->getName();
424       msg += "', '";
425       if (msg.length() > 1024) {
426         msg.pop_back(); // remove trailing quote
427         msg += "...(list truncated)......";
428         break;
429       }
430     }
431     xbt_die("%s", msg.c_str());
432   }
433   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
434   xbt_assert(factory, "Function '%s' unknown", actor->function);
435
436   double start_time = actor->start_time;
437   double kill_time  = actor->kill_time;
438   bool auto_restart = actor->on_failure != ActorOnFailure::DIE;
439
440   std::string actor_name     = actor->args[0];
441   std::function<void()> code = factory(std::move(actor->args));
442   std::shared_ptr<std::map<std::string, std::string>> properties(actor->properties);
443
444   simgrid::simix::ProcessArg* arg =
445       new simgrid::simix::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
446
447   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
448
449   if (start_time > SIMIX_get_clock()) {
450
451     arg = new simgrid::simix::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
452
453     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->getCname(), start_time);
454     SIMIX_timer_set(start_time, [arg, auto_restart]() {
455       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
456                                                                 arg->host, arg->properties.get(), nullptr);
457       if (arg->kill_time >= 0)
458         simcall_process_set_kill_time(actor, arg->kill_time);
459       if (auto_restart)
460         SIMIX_process_auto_restart_set(actor, auto_restart);
461       delete arg;
462     });
463   } else {                      // start_time <= SIMIX_get_clock()
464     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->getCname());
465
466     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
467                                                               arg->properties.get(), nullptr);
468
469     /* The actor creation will fail if the host is currently dead, but that's fine */
470     if (actor != nullptr) {
471       if (arg->kill_time >= 0)
472         simcall_process_set_kill_time(actor, arg->kill_time);
473       if (auto_restart)
474         SIMIX_process_auto_restart_set(actor, auto_restart);
475     }
476   }
477 }
478
479 void sg_platf_new_peer(PeerCreationArgs* peer)
480 {
481   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
482   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
483
484   std::vector<double> speedPerPstate;
485   speedPerPstate.push_back(peer->speed);
486   simgrid::s4u::Host* host = as->createHost(peer->id.c_str(), &speedPerPstate, 1, nullptr);
487
488   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
489
490   /* Change from the defaults */
491   if (peer->state_trace)
492     host->pimpl_cpu->setStateTrace(peer->state_trace);
493   if (peer->speed_trace)
494     host->pimpl_cpu->setSpeedTrace(peer->speed_trace);
495 }
496
497 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
498
499 void sg_platf_end() {
500   simgrid::s4u::onPlatformCreated();
501 }
502
503 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
504 static void surf_config_models_setup()
505 {
506   std::string host_model_name    = xbt_cfg_get_string("host/model");
507   std::string network_model_name = xbt_cfg_get_string("network/model");
508   std::string cpu_model_name     = xbt_cfg_get_string("cpu/model");
509   std::string storage_model_name = xbt_cfg_get_string("storage/model");
510
511   /* The compound host model is needed when using non-default net/cpu models */
512   if ((not xbt_cfg_is_default_value("network/model") || not xbt_cfg_is_default_value("cpu/model")) &&
513       xbt_cfg_is_default_value("host/model")) {
514     host_model_name = "compound";
515     xbt_cfg_set_string("host/model", host_model_name.c_str());
516   }
517
518   XBT_DEBUG("host model: %s", host_model_name.c_str());
519   if (host_model_name == "compound") {
520     xbt_assert(not cpu_model_name.empty(), "Set a cpu model to use with the 'compound' host model");
521     xbt_assert(not network_model_name.empty(), "Set a network model to use with the 'compound' host model");
522
523     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
524     surf_cpu_model_description[cpu_id].model_init_preparse();
525
526     int network_id = find_model_description(surf_network_model_description, network_model_name);
527     surf_network_model_description[network_id].model_init_preparse();
528   }
529
530   XBT_DEBUG("Call host_model_init");
531   int host_id = find_model_description(surf_host_model_description, host_model_name);
532   surf_host_model_description[host_id].model_init_preparse();
533
534   XBT_DEBUG("Call vm_model_init");
535   surf_vm_model_init_HL13();
536
537   XBT_DEBUG("Call storage_model_init");
538   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
539   surf_storage_model_description[storage_id].model_init_preparse();
540 }
541
542 /**
543  * \brief Add a Zone to the platform
544  *
545  * Add a new autonomous system to the platform. Any elements (such as host, router or sub-Zone) added after this call
546  * and before the corresponding call to sg_platf_new_Zone_seal() will be added to this Zone.
547  *
548  * Once this function was called, the configuration concerning the used models cannot be changed anymore.
549  *
550  * @param zone the parameters defining the Zone to build.
551  */
552 simgrid::s4u::NetZone* sg_platf_new_Zone_begin(ZoneCreationArgs* zone)
553 {
554   if (not surf_parse_models_setup_already_called) {
555     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
556      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
557      *
558      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
559      * (FIXME: check it out by creating a file beginning with one of these tags)
560      * but cluster and peer create ASes internally, so putting the code in there is ok.
561      */
562     surf_parse_models_setup_already_called = 1;
563     surf_config_models_setup();
564   }
565
566   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
567                             * any further config now that we created some real content */
568
569   /* search the routing model */
570   simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
571   switch (zone->routing) {
572     case A_surfxml_AS_routing_Cluster:
573       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id);
574       break;
575     case A_surfxml_AS_routing_ClusterDragonfly:
576       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id);
577       break;
578     case A_surfxml_AS_routing_ClusterTorus:
579       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id);
580       break;
581     case A_surfxml_AS_routing_ClusterFatTree:
582       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id);
583       break;
584     case A_surfxml_AS_routing_Dijkstra:
585       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, false);
586       break;
587     case A_surfxml_AS_routing_DijkstraCache:
588       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, true);
589       break;
590     case A_surfxml_AS_routing_Floyd:
591       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id);
592       break;
593     case A_surfxml_AS_routing_Full:
594       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id);
595       break;
596     case A_surfxml_AS_routing_None:
597       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id);
598       break;
599     case A_surfxml_AS_routing_Vivaldi:
600       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id);
601       break;
602     default:
603       xbt_die("Not a valid model!");
604       break;
605   }
606
607   if (current_routing == nullptr) { /* it is the first one */
608     xbt_assert(simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ == nullptr,
609                "All defined components must belong to a networking zone.");
610     simgrid::s4u::Engine::getInstance()->pimpl->netRoot_ = new_zone;
611
612   } else {
613     /* set the father behavior */
614     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
615       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
616     /* add to the sons dictionary */
617     current_routing->getChildren()->push_back(static_cast<simgrid::s4u::NetZone*>(new_zone));
618   }
619
620   /* set the new current component of the tree */
621   current_routing = new_zone;
622
623   simgrid::s4u::NetZone::onCreation(*new_zone); // notify the signal
624
625   return new_zone;
626 }
627
628 /**
629  * \brief Specify that the description of the current AS is finished
630  *
631  * Once you've declared all the content of your AS, you have to seal
632  * it with this call. Your AS is not usable until you call this function.
633  */
634 void sg_platf_new_Zone_seal()
635 {
636   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
637   current_routing->seal();
638   simgrid::s4u::NetZone::onSeal(*current_routing);
639   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->getFather());
640 }
641
642 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
643 void sg_platf_new_hostlink(HostLinkCreationArgs* hostlink)
644 {
645   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id.c_str())->pimpl_netpoint;
646   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
647   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
648              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
649
650   simgrid::surf::LinkImpl* linkUp   = simgrid::surf::LinkImpl::byName(hostlink->link_up);
651   simgrid::surf::LinkImpl* linkDown = simgrid::surf::LinkImpl::byName(hostlink->link_down);
652
653   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
654   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
655
656   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
657
658   if (as_cluster->privateLinks_.find(netpoint->id()) != as_cluster->privateLinks_.end())
659     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
660
661   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->getCname(), netpoint->id());
662   as_cluster->privateLinks_.insert({netpoint->id(), {linkUp, linkDown}});
663 }
664
665 void sg_platf_new_trace(TraceCreationArgs* trace)
666 {
667   tmgr_trace_t tmgr_trace;
668   if (not trace->file.empty()) {
669     tmgr_trace = tmgr_trace_new_from_file(trace->file);
670   } else {
671     xbt_assert(not trace->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
672                trace->id.c_str());
673     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
674   }
675   traces_set_list.insert({trace->id, tmgr_trace});
676 }