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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/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 {
52   simgrid::s4u::on_platform_created.connect(check_disk_attachment);
53 }
54
55 /** Module management function: frees all internal data structures */
56 void sg_platf_exit() {
57   simgrid::surf::on_cluster.disconnectSlots();
58   simgrid::s4u::on_platform_created.disconnectSlots();
59
60   /* make sure that we will reinit the models while loading the platf once reinited */
61   surf_parse_models_setup_already_called = 0;
62   surf_parse_lex_destroy();
63 }
64
65 /** @brief Add an host to the current AS */
66 void sg_platf_new_host(simgrid::kernel::routing::HostCreationArgs* args)
67 {
68   std::map<std::string, std::string> props;
69   if (args->properties) {
70     for (auto const& elm : *args->properties)
71       props.insert({elm.first, elm.second});
72     delete args->properties;
73   }
74
75   simgrid::s4u::Host* host =
76       routing_get_current()->create_host(args->id, &args->speed_per_pstate, args->core_amount, &props);
77
78   host->pimpl_->storage_ = mount_list;
79   mount_list.clear();
80
81   /* Change from the defaults */
82   if (args->state_trace)
83     host->pimpl_cpu->set_state_trace(args->state_trace);
84   if (args->speed_trace)
85     host->pimpl_cpu->set_speed_trace(args->speed_trace);
86   if (args->pstate != 0)
87     host->pimpl_cpu->set_pstate(args->pstate);
88   if (args->coord && strcmp(args->coord, ""))
89     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
90 }
91
92 /** @brief Add a "router" to the network element list */
93 simgrid::kernel::routing::NetPoint* sg_platf_new_router(std::string name, const char* coords)
94 {
95   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
96
97   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
98     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
99   xbt_assert(nullptr == simgrid::s4u::Engine::get_instance()->netpoint_by_name_or_null(name),
100              "Refusing to create a router named '%s': this name already describes a node.", name.c_str());
101
102   simgrid::kernel::routing::NetPoint* netpoint =
103       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
104   XBT_DEBUG("Router '%s' has the id %u", name.c_str(), netpoint->id());
105
106   if (coords && strcmp(coords, ""))
107     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
108
109
110   return netpoint;
111 }
112
113 void sg_platf_new_link(simgrid::kernel::routing::LinkCreationArgs* link)
114 {
115   std::vector<std::string> names;
116
117   if (link->policy == simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX) {
118     names.push_back(link->id+ "_UP");
119     names.push_back(link->id+ "_DOWN");
120   } else {
121     names.push_back(link->id);
122   }
123   for (auto const& link_name : names) {
124     simgrid::kernel::resource::LinkImpl* l =
125         surf_network_model->createLink(link_name, link->bandwidth, link->latency, link->policy);
126
127     if (link->properties) {
128       for (auto const& elm : *link->properties)
129         l->set_property(elm.first, elm.second);
130     }
131
132     if (link->latency_trace)
133       l->setLatencyTrace(link->latency_trace);
134     if (link->bandwidth_trace)
135       l->setBandwidthTrace(link->bandwidth_trace);
136     if (link->state_trace)
137       l->setStateTrace(link->state_trace);
138   }
139   delete link->properties;
140 }
141
142 void sg_platf_new_cluster(simgrid::kernel::routing::ClusterCreationArgs* cluster)
143 {
144   using simgrid::kernel::routing::ClusterZone;
145   using simgrid::kernel::routing::DragonflyZone;
146   using simgrid::kernel::routing::FatTreeZone;
147   using simgrid::kernel::routing::TorusZone;
148
149   int rankId=0;
150
151   // What an inventive way of initializing the AS that I have as ancestor :-(
152   simgrid::kernel::routing::ZoneCreationArgs zone;
153   zone.id = cluster->id;
154   switch (cluster->topology) {
155     case simgrid::kernel::routing::ClusterTopology::TORUS:
156       zone.routing = A_surfxml_AS_routing_ClusterTorus;
157       break;
158     case simgrid::kernel::routing::ClusterTopology::DRAGONFLY:
159       zone.routing = A_surfxml_AS_routing_ClusterDragonfly;
160       break;
161     case simgrid::kernel::routing::ClusterTopology::FAT_TREE:
162       zone.routing = A_surfxml_AS_routing_ClusterFatTree;
163       break;
164     default:
165       zone.routing = A_surfxml_AS_routing_Cluster;
166       break;
167   }
168   sg_platf_new_Zone_begin(&zone);
169   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
170   current_as->parse_specific_arguments(cluster);
171
172   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
173     current_as->num_links_per_node_++;
174     current_as->has_loopback_ = true;
175   }
176
177   if(cluster->limiter_link > 0){
178     current_as->num_links_per_node_++;
179     current_as->has_limiter_ = true;
180   }
181
182   for (int const& i : *cluster->radicals) {
183     std::string host_id = std::string(cluster->prefix) + std::to_string(i) + cluster->suffix;
184     std::string link_id = std::string(cluster->id) + "_link_" + std::to_string(i);
185
186     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id.c_str(), cluster->speeds.front());
187
188     simgrid::kernel::routing::HostCreationArgs host;
189     host.id = host_id.c_str();
190     if ((cluster->properties != nullptr) && (not cluster->properties->empty())) {
191       host.properties = new std::map<std::string, std::string>;
192
193       for (auto const& elm : *cluster->properties)
194         host.properties->insert({elm.first, elm.second});
195     }
196
197     host.speed_per_pstate = cluster->speeds;
198     host.pstate = 0;
199     host.core_amount = cluster->core_amount;
200     host.coord = "";
201     sg_platf_new_host(&host);
202     XBT_DEBUG("</host>");
203
204     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id.c_str(), cluster->bw, cluster->lat);
205
206     // All links are saved in a matrix;
207     // every row describes a single node; every node may have multiple links.
208     // the first column may store a link from x to x if p_has_loopback is set
209     // the second column may store a limiter link if p_has_limiter is set
210     // other columns are to store one or more link for the node
211
212     //add a loopback link
213     simgrid::kernel::resource::LinkImpl* linkUp   = nullptr;
214     simgrid::kernel::resource::LinkImpl* linkDown = nullptr;
215     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
216       std::string tmp_link = link_id + "_loopback";
217       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->loopback_bw);
218
219       simgrid::kernel::routing::LinkCreationArgs link;
220       link.id        = tmp_link;
221       link.bandwidth = cluster->loopback_bw;
222       link.latency   = cluster->loopback_lat;
223       link.policy    = simgrid::s4u::Link::SharingPolicy::FATPIPE;
224       sg_platf_new_link(&link);
225       linkUp   = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
226       linkDown = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
227
228       auto* as_cluster = static_cast<ClusterZone*>(current_as);
229       as_cluster->private_links_.insert({as_cluster->node_pos(rankId), {linkUp, linkDown}});
230     }
231
232     //add a limiter link (shared link to account for maximal bandwidth of the node)
233     linkUp   = nullptr;
234     linkDown = nullptr;
235     if(cluster->limiter_link > 0){
236       std::string tmp_link = std::string(link_id) + "_limiter";
237       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link.c_str(), cluster->limiter_link);
238
239       simgrid::kernel::routing::LinkCreationArgs link;
240       link.id        = tmp_link;
241       link.bandwidth = cluster->limiter_link;
242       link.latency = 0;
243       link.policy    = simgrid::s4u::Link::SharingPolicy::SHARED;
244       sg_platf_new_link(&link);
245       linkDown = simgrid::kernel::resource::LinkImpl::byName(tmp_link);
246       linkUp   = linkDown;
247       current_as->private_links_.insert({current_as->node_pos_with_loopback(rankId), {linkUp, linkDown}});
248     }
249
250     //call the cluster function that adds the others links
251     if (cluster->topology == simgrid::kernel::routing::ClusterTopology::FAT_TREE) {
252       static_cast<FatTreeZone*>(current_as)->add_processing_node(i);
253     } else {
254       current_as->create_links_for_node(cluster, i, rankId, current_as->node_pos_with_loopback_limiter(rankId));
255     }
256     rankId++;
257   }
258   delete cluster->properties;
259
260   // Add a router.
261   XBT_DEBUG(" ");
262   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id.c_str());
263   if (cluster->router_id.empty()) {
264     std::string newid   = std::string(cluster->prefix) + cluster->id + "_router" + cluster->suffix;
265     current_as->router_ = sg_platf_new_router(newid, NULL);
266   } else {
267     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
268   }
269
270   //Make the backbone
271   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
272
273     simgrid::kernel::routing::LinkCreationArgs link;
274     link.id        = std::string(cluster->id)+ "_backbone";
275     link.bandwidth = cluster->bb_bw;
276     link.latency   = cluster->bb_lat;
277     link.policy    = cluster->bb_sharing_policy;
278
279     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
280     sg_platf_new_link(&link);
281
282     routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl::byName(link.id));
283   }
284
285   XBT_DEBUG("</AS>");
286   sg_platf_new_Zone_seal();
287
288   simgrid::surf::on_cluster(cluster);
289   delete cluster->radicals;
290 }
291
292 void routing_cluster_add_backbone(simgrid::kernel::resource::LinkImpl* bb)
293 {
294   simgrid::kernel::routing::ClusterZone* cluster =
295       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
296
297   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
298   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->get_cname());
299
300   cluster->backbone_ = bb;
301   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->get_cname());
302 }
303
304 void sg_platf_new_cabinet(simgrid::kernel::routing::CabinetCreationArgs* cabinet)
305 {
306   for (int const& radical : *cabinet->radicals) {
307     std::string hostname = cabinet->prefix + std::to_string(radical) + cabinet->suffix;
308     simgrid::kernel::routing::HostCreationArgs host;
309     host.pstate           = 0;
310     host.core_amount      = 1;
311     host.id               = hostname.c_str();
312     host.speed_per_pstate.push_back(cabinet->speed);
313     sg_platf_new_host(&host);
314
315     simgrid::kernel::routing::LinkCreationArgs link;
316     link.policy    = simgrid::s4u::Link::SharingPolicy::SPLITDUPLEX;
317     link.latency   = cabinet->lat;
318     link.bandwidth = cabinet->bw;
319     link.id        = "link_" + hostname;
320     sg_platf_new_link(&link);
321
322     simgrid::kernel::routing::HostLinkCreationArgs host_link;
323     host_link.id        = hostname;
324     host_link.link_up   = std::string("link_") + hostname + "_UP";
325     host_link.link_down = std::string("link_") + hostname + "_DOWN";
326     sg_platf_new_hostlink(&host_link);
327   }
328   delete cabinet->radicals;
329 }
330
331 void sg_platf_new_storage(simgrid::kernel::routing::StorageCreationArgs* storage)
332 {
333   xbt_assert(std::find(known_storages.begin(), known_storages.end(), storage->id) == known_storages.end(),
334              "Refusing to add a second storage named \"%s\"", storage->id.c_str());
335
336   simgrid::surf::StorageType* stype;
337   auto st = storage_types.find(storage->type_id);
338   if (st != storage_types.end()) {
339     stype = st->second;
340   } else {
341     xbt_die("No storage type '%s'", storage->type_id.c_str());
342   }
343
344   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id.c_str(),
345             storage->type_id.c_str(), storage->content.c_str());
346
347   known_storages.push_back(storage->id);
348
349   // if storage content is not specified use the content of storage_type if any
350   if (storage->content.empty() && not stype->content.empty()) {
351     storage->content = stype->content;
352     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s)", storage->id.c_str(),
353               stype->id.c_str());
354   }
355
356   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
357             "\n\t\tmodel '%s' \n\t\tcontent '%s' "
358             "\n\t\tproperties '%p''\n",
359             storage->id.c_str(), stype->model.c_str(), stype->id.c_str(), storage->content.c_str(),
360             storage->properties);
361
362   auto s = surf_storage_model->createStorage(storage->id, stype->id, storage->content, storage->attach);
363
364   if (storage->properties) {
365     for (auto const& elm : *storage->properties)
366       s->set_property(elm.first, elm.second);
367     delete storage->properties;
368   }
369 }
370
371 void sg_platf_new_storage_type(simgrid::kernel::routing::StorageTypeCreationArgs* storage_type)
372 {
373   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
374              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id.c_str());
375
376   simgrid::surf::StorageType* stype =
377       new simgrid::surf::StorageType(storage_type->id, storage_type->model, storage_type->content,
378                                      storage_type->properties, storage_type->model_properties, storage_type->size);
379
380   XBT_DEBUG("Create a storage type id '%s' with model '%s', content '%s'", storage_type->id.c_str(),
381             storage_type->model.c_str(), storage_type->content.c_str());
382
383   storage_types[storage_type->id] = stype;
384 }
385
386 void sg_platf_new_mount(simgrid::kernel::routing::MountCreationArgs* mount)
387 {
388   xbt_assert(std::find(known_storages.begin(), known_storages.end(), mount->storageId) != known_storages.end(),
389              "Cannot mount non-existent disk \"%s\"", mount->storageId.c_str());
390
391   XBT_DEBUG("Mount '%s' on '%s'", mount->storageId.c_str(), mount->name.c_str());
392
393   if (mount_list.empty())
394     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
395   mount_list.insert({mount->name, simgrid::s4u::Engine::get_instance()->storage_by_name(mount->storageId)->getImpl()});
396 }
397
398 void sg_platf_new_route(simgrid::kernel::routing::RouteCreationArgs* route)
399 {
400   routing_get_current()->add_route(route->src, route->dst, route->gw_src, route->gw_dst, route->link_list,
401                                    route->symmetrical);
402 }
403
404 void sg_platf_new_bypassRoute(simgrid::kernel::routing::RouteCreationArgs* bypassRoute)
405 {
406   routing_get_current()->add_bypass_route(bypassRoute->src, bypassRoute->dst, bypassRoute->gw_src, bypassRoute->gw_dst,
407                                           bypassRoute->link_list, bypassRoute->symmetrical);
408 }
409
410 void sg_platf_new_actor(simgrid::kernel::routing::ActorCreationArgs* actor)
411 {
412   sg_host_t host = sg_host_by_name(actor->host);
413   if (not host) {
414     // The requested host does not exist. Do a nice message to the user
415     std::string msg = std::string("Cannot create actor '") + actor->function + "': host '" + actor->host +
416                       "' does not exist\nExisting hosts: '";
417
418     std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
419
420     for (auto const& host : list) {
421       msg += host->get_name();
422       msg += "', '";
423       if (msg.length() > 1024) {
424         msg.pop_back(); // remove trailing quote
425         msg += "...(list truncated)......";
426         break;
427       }
428     }
429     xbt_die("%s", msg.c_str());
430   }
431   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(actor->function);
432   xbt_assert(factory, "Function '%s' unknown", actor->function);
433
434   double start_time = actor->start_time;
435   double kill_time  = actor->kill_time;
436   bool auto_restart = actor->on_failure != simgrid::kernel::routing::ActorOnFailure::DIE;
437
438   std::string actor_name     = actor->args[0];
439   std::function<void()> code = factory(std::move(actor->args));
440   std::shared_ptr<std::map<std::string, std::string>> properties(actor->properties);
441
442   simgrid::kernel::actor::ProcessArg* arg =
443       new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
444
445   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
446
447   if (start_time > SIMIX_get_clock()) {
448
449     arg = new simgrid::kernel::actor::ProcessArg(actor_name, code, nullptr, host, kill_time, properties, auto_restart);
450
451     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->get_cname(), start_time);
452     SIMIX_timer_set(start_time, [arg, auto_restart]() {
453       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
454                                                                 arg->host, arg->properties.get(), nullptr);
455       if (arg->kill_time >= 0)
456         simcall_process_set_kill_time(actor, arg->kill_time);
457       if (auto_restart)
458         SIMIX_process_auto_restart_set(actor, auto_restart);
459       delete arg;
460     });
461   } else {                      // start_time <= SIMIX_get_clock()
462     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->get_cname());
463
464     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
465                                                               arg->properties.get(), nullptr);
466
467     /* The actor creation will fail if the host is currently dead, but that's fine */
468     if (actor != nullptr) {
469       if (arg->kill_time >= 0)
470         simcall_process_set_kill_time(actor, arg->kill_time);
471       if (auto_restart)
472         SIMIX_process_auto_restart_set(actor, auto_restart);
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> speedPerPstate;
483   speedPerPstate.push_back(peer->speed);
484   simgrid::s4u::Host* host = as->create_host(peer->id.c_str(), &speedPerPstate, 1, nullptr);
485
486   as->setPeerLink(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_trace(peer->state_trace);
491   if (peer->speed_trace)
492     host->pimpl_cpu->set_speed_trace(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::s4u::NetZone* 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|AS|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 create ASes internally, so putting the code in there is ok.
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   switch (zone->routing) {
566     case A_surfxml_AS_routing_Cluster:
567       new_zone = new simgrid::kernel::routing::ClusterZone(current_routing, zone->id);
568       break;
569     case A_surfxml_AS_routing_ClusterDragonfly:
570       new_zone = new simgrid::kernel::routing::DragonflyZone(current_routing, zone->id);
571       break;
572     case A_surfxml_AS_routing_ClusterTorus:
573       new_zone = new simgrid::kernel::routing::TorusZone(current_routing, zone->id);
574       break;
575     case A_surfxml_AS_routing_ClusterFatTree:
576       new_zone = new simgrid::kernel::routing::FatTreeZone(current_routing, zone->id);
577       break;
578     case A_surfxml_AS_routing_Dijkstra:
579       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, false);
580       break;
581     case A_surfxml_AS_routing_DijkstraCache:
582       new_zone = new simgrid::kernel::routing::DijkstraZone(current_routing, zone->id, true);
583       break;
584     case A_surfxml_AS_routing_Floyd:
585       new_zone = new simgrid::kernel::routing::FloydZone(current_routing, zone->id);
586       break;
587     case A_surfxml_AS_routing_Full:
588       new_zone = new simgrid::kernel::routing::FullZone(current_routing, zone->id);
589       break;
590     case A_surfxml_AS_routing_None:
591       new_zone = new simgrid::kernel::routing::EmptyZone(current_routing, zone->id);
592       break;
593     case A_surfxml_AS_routing_Vivaldi:
594       new_zone = new simgrid::kernel::routing::VivaldiZone(current_routing, zone->id);
595       break;
596     default:
597       xbt_die("Not a valid model!");
598       break;
599   }
600
601   if (current_routing == nullptr) { /* it is the first one */
602     simgrid::s4u::Engine::get_instance()->set_netzone_root(new_zone);
603   } else {
604     /* set the father behavior */
605     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
606       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
607     /* add to the sons dictionary */
608     current_routing->getChildren()->push_back(static_cast<simgrid::s4u::NetZone*>(new_zone));
609   }
610
611   /* set the new current component of the tree */
612   current_routing = new_zone;
613   simgrid::s4u::NetZone::onCreation(*new_zone); // notify the signal
614
615   return new_zone;
616 }
617
618 /**
619  * \brief Specify that the description of the current AS is finished
620  *
621  * Once you've declared all the content of your AS, you have to seal
622  * it with this call. Your AS is not usable until you call this function.
623  */
624 void sg_platf_new_Zone_seal()
625 {
626   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
627   current_routing->seal();
628   simgrid::s4u::NetZone::onSeal(*current_routing);
629   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->get_father());
630 }
631
632 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
633 void sg_platf_new_hostlink(simgrid::kernel::routing::HostLinkCreationArgs* hostlink)
634 {
635   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id.c_str())->pimpl_netpoint;
636   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id.c_str());
637   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
638              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
639
640   simgrid::kernel::resource::LinkImpl* linkUp   = simgrid::kernel::resource::LinkImpl::byName(hostlink->link_up);
641   simgrid::kernel::resource::LinkImpl* linkDown = simgrid::kernel::resource::LinkImpl::byName(hostlink->link_down);
642
643   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up.c_str());
644   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down.c_str());
645
646   auto* as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
647
648   if (as_cluster->private_links_.find(netpoint->id()) != as_cluster->private_links_.end())
649     surf_parse_error(std::string("Host_link for '") + hostlink->id.c_str() + "' is already defined!");
650
651   XBT_DEBUG("Push Host_link for host '%s' to position %u", netpoint->get_cname(), netpoint->id());
652   as_cluster->private_links_.insert({netpoint->id(), {linkUp, linkDown}});
653 }
654
655 void sg_platf_new_trace(simgrid::kernel::routing::TraceCreationArgs* trace)
656 {
657   tmgr_trace_t tmgr_trace;
658   if (not trace->file.empty()) {
659     tmgr_trace = tmgr_trace_new_from_file(trace->file);
660   } else {
661     xbt_assert(not trace->pc_data.empty(), "Trace '%s' must have either a content, or point to a file on disk.",
662                trace->id.c_str());
663     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
664   }
665   traces_set_list.insert({trace->id, tmgr_trace});
666 }