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[simgrid.git] / 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::map<std::string, simgrid::surf::Storage*> 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 // FIXME: The following duplicates the content of s4u::Host
42 namespace simgrid {
43 namespace s4u {
44 extern std::map<std::string, simgrid::s4u::Host*> host_list;
45 }
46 }
47
48 static int surf_parse_models_setup_already_called = 0;
49 std::map<std::string, storage_type_t> storage_types;
50
51 /** The current AS in the parsing */
52 static simgrid::kernel::routing::NetZoneImpl* current_routing = nullptr;
53 static simgrid::kernel::routing::NetZoneImpl* routing_get_current()
54 {
55   return current_routing;
56 }
57
58 /** Module management function: creates all internal data structures */
59 void sg_platf_init()
60 { /* Do nothing: just for symmetry of user code */
61 }
62
63 /** Module management function: frees all internal data structures */
64 void sg_platf_exit() {
65   simgrid::surf::on_cluster.disconnect_all_slots();
66   simgrid::s4u::onPlatformCreated.disconnect_all_slots();
67
68   /* make sure that we will reinit the models while loading the platf once reinited */
69   surf_parse_models_setup_already_called = 0;
70   surf_parse_lex_destroy();
71 }
72
73 /** @brief Add an host to the current AS */
74 void sg_platf_new_host(sg_platf_host_cbarg_t args)
75 {
76   std::unordered_map<std::string, std::string> props;
77   if (args->properties) {
78     xbt_dict_cursor_t cursor=nullptr;
79     char *key;
80     char* data;
81     xbt_dict_foreach (args->properties, cursor, key, data)
82       props[key] = data;
83     xbt_dict_free(&args->properties);
84   }
85
86   simgrid::s4u::Host* host =
87       routing_get_current()->createHost(args->id, &args->speed_per_pstate, args->core_amount, &props);
88
89   host->pimpl_->storage_ = mount_list;
90   mount_list.clear();
91
92   /* Change from the defaults */
93   if (args->state_trace)
94     host->pimpl_cpu->setStateTrace(args->state_trace);
95   if (args->speed_trace)
96     host->pimpl_cpu->setSpeedTrace(args->speed_trace);
97   if (args->pstate != 0)
98     host->pimpl_cpu->setPState(args->pstate);
99   if (args->coord && strcmp(args->coord, ""))
100     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
101
102   if (TRACE_is_enabled() && TRACE_needs_platform())
103     sg_instr_new_host(*host);
104 }
105
106 /** @brief Add a "router" to the network element list */
107 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const char* name, const char* coords)
108 {
109   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
110
111   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
112     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
113   xbt_assert(nullptr == simgrid::s4u::Engine::instance()->netpointByNameOrNull(name),
114              "Refusing to create a router named '%s': this name already describes a node.", name);
115
116   simgrid::kernel::routing::NetPoint* netpoint =
117       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
118   XBT_DEBUG("Router '%s' has the id %d", name, netpoint->id());
119
120   if (coords && strcmp(coords, ""))
121     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
122
123   sg_instr_new_router(name);
124
125   return netpoint;
126 }
127
128 void sg_platf_new_link(LinkCreationArgs* link)
129 {
130   std::vector<std::string> names;
131
132   if (link->policy == SURF_LINK_FULLDUPLEX) {
133     names.push_back(link->id+ "_UP");
134     names.push_back(link->id+ "_DOWN");
135   } else {
136     names.push_back(link->id);
137   }
138   for (auto link_name : names) {
139     simgrid::surf::LinkImpl* l =
140         surf_network_model->createLink(link_name.c_str(), link->bandwidth, link->latency, link->policy);
141
142     if (link->properties) {
143       xbt_dict_cursor_t cursor = nullptr;
144       char* key;
145       char* data;
146       xbt_dict_foreach (link->properties, cursor, key, data)
147         l->setProperty(key, data);
148       xbt_dict_free(&link->properties);
149     }
150
151     if (link->latency_trace)
152       l->setLatencyTrace(link->latency_trace);
153     if (link->bandwidth_trace)
154       l->setBandwidthTrace(link->bandwidth_trace);
155     if (link->state_trace)
156       l->setStateTrace(link->state_trace);
157   }
158 }
159
160 void sg_platf_new_cluster(sg_platf_cluster_cbarg_t cluster)
161 {
162   using simgrid::kernel::routing::ClusterZone;
163   using simgrid::kernel::routing::DragonflyZone;
164   using simgrid::kernel::routing::FatTreeZone;
165   using simgrid::kernel::routing::TorusZone;
166
167   int rankId=0;
168
169   // What an inventive way of initializing the AS that I have as ancestor :-(
170   s_sg_platf_AS_cbarg_t AS;
171   AS.id = cluster->id;
172   switch (cluster->topology) {
173   case SURF_CLUSTER_TORUS:
174     AS.routing = A_surfxml_AS_routing_ClusterTorus;
175     break;
176   case SURF_CLUSTER_DRAGONFLY:
177     AS.routing = A_surfxml_AS_routing_ClusterDragonfly;
178     break;
179   case SURF_CLUSTER_FAT_TREE:
180     AS.routing = A_surfxml_AS_routing_ClusterFatTree;
181     break;
182   default:
183     AS.routing = A_surfxml_AS_routing_Cluster;
184     break;
185   }
186   sg_platf_new_AS_begin(&AS);
187   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
188   current_as->parse_specific_arguments(cluster);
189
190   if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
191     current_as->linkCountPerNode_++;
192     current_as->hasLoopback_ = 1;
193   }
194
195   if(cluster->limiter_link > 0){
196     current_as->linkCountPerNode_++;
197     current_as->hasLimiter_ = 1;
198   }
199
200   for (int i : *cluster->radicals) {
201     char * host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
202     char * link_id = bprintf("%s_link_%d", cluster->id, i);
203
204     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->speeds.front());
205
206     s_sg_platf_host_cbarg_t host;
207     memset(&host, 0, sizeof(host));
208     host.id = host_id;
209     if ((cluster->properties != nullptr) && (!xbt_dict_is_empty(cluster->properties))) {
210       xbt_dict_cursor_t cursor=nullptr;
211       char *key;
212       char* data;
213       host.properties = xbt_dict_new_homogeneous(free);
214
215       xbt_dict_foreach(cluster->properties,cursor,key,data) {
216         xbt_dict_set(host.properties, key, xbt_strdup(data), nullptr);
217       }
218     }
219
220     host.speed_per_pstate = cluster->speeds;
221     host.pstate = 0;
222     host.core_amount = cluster->core_amount;
223     host.coord = "";
224     sg_platf_new_host(&host);
225     XBT_DEBUG("</host>");
226
227     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id, cluster->bw, cluster->lat);
228
229     // All links are saved in a matrix;
230     // every row describes a single node; every node may have multiple links.
231     // the first column may store a link from x to x if p_has_loopback is set
232     // the second column may store a limiter link if p_has_limiter is set
233     // other columns are to store one or more link for the node
234
235     //add a loopback link
236     simgrid::surf::LinkImpl* linkUp   = nullptr;
237     simgrid::surf::LinkImpl* linkDown = nullptr;
238     if(cluster->loopback_bw > 0 || cluster->loopback_lat > 0){
239       char *tmp_link = bprintf("%s_loopback", link_id);
240       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->loopback_bw);
241
242       LinkCreationArgs link;
243       link.id        = tmp_link;
244       link.bandwidth = cluster->loopback_bw;
245       link.latency   = cluster->loopback_lat;
246       link.policy    = SURF_LINK_FATPIPE;
247       sg_platf_new_link(&link);
248       linkUp   = simgrid::surf::LinkImpl::byName(tmp_link);
249       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
250       free(tmp_link);
251
252       auto as_cluster = static_cast<ClusterZone*>(current_as);
253       as_cluster->privateLinks_.insert({rankId * as_cluster->linkCountPerNode_, {linkUp, linkDown}});
254     }
255
256     //add a limiter link (shared link to account for maximal bandwidth of the node)
257     linkUp   = nullptr;
258     linkDown = nullptr;
259     if(cluster->limiter_link > 0){
260       char *tmp_link = bprintf("%s_limiter", link_id);
261       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->limiter_link);
262
263       LinkCreationArgs link;
264       link.id = tmp_link;
265       link.bandwidth = cluster->limiter_link;
266       link.latency = 0;
267       link.policy = SURF_LINK_SHARED;
268       sg_platf_new_link(&link);
269       linkDown = simgrid::surf::LinkImpl::byName(tmp_link);
270       linkUp   = linkDown;
271       free(tmp_link);
272       current_as->privateLinks_.insert(
273           {rankId * current_as->linkCountPerNode_ + current_as->hasLoopback_, {linkUp, linkDown}});
274     }
275
276     //call the cluster function that adds the others links
277     if (cluster->topology == SURF_CLUSTER_FAT_TREE) {
278       static_cast<FatTreeZone*>(current_as)->addProcessingNode(i);
279     } else {
280       current_as->create_links_for_node(cluster, i, rankId,
281           rankId*current_as->linkCountPerNode_ + current_as->hasLoopback_ + current_as->hasLimiter_ );
282     }
283     xbt_free(link_id);
284     xbt_free(host_id);
285     rankId++;
286   }
287   xbt_dict_free(&cluster->properties);
288
289   // Add a router.
290   XBT_DEBUG(" ");
291   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
292   if (!cluster->router_id || !strcmp(cluster->router_id, "")) {
293     char* newid         = bprintf("%s%s_router%s", cluster->prefix, cluster->id, cluster->suffix);
294     current_as->router_ = sg_platf_new_router(newid, NULL);
295     free(newid);
296   } else {
297     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
298   }
299
300   //Make the backbone
301   if ((cluster->bb_bw > 0) || (cluster->bb_lat > 0)) {
302
303     LinkCreationArgs link;
304     link.id        = std::string(cluster->id)+ "_backbone";
305     link.bandwidth = cluster->bb_bw;
306     link.latency   = cluster->bb_lat;
307     link.policy    = cluster->bb_sharing_policy;
308
309     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id.c_str(), cluster->bb_bw, cluster->bb_lat);
310     sg_platf_new_link(&link);
311
312     routing_cluster_add_backbone(simgrid::surf::LinkImpl::byName(link.id.c_str()));
313   }
314
315   XBT_DEBUG("</AS>");
316   sg_platf_new_AS_seal();
317
318   simgrid::surf::on_cluster(cluster);
319   delete cluster->radicals;
320 }
321
322 void routing_cluster_add_backbone(simgrid::surf::LinkImpl* bb)
323 {
324   simgrid::kernel::routing::ClusterZone* cluster =
325       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
326
327   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
328   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->name());
329
330   cluster->backbone_ = bb;
331   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->name());
332 }
333
334 void sg_platf_new_cabinet(sg_platf_cabinet_cbarg_t cabinet)
335 {
336   for (int radical : *cabinet->radicals) {
337     std::string hostname = std::string(cabinet->prefix) + std::to_string(radical) + std::string(cabinet->suffix);
338     s_sg_platf_host_cbarg_t host;
339     memset(&host, 0, sizeof(host));
340     host.pstate           = 0;
341     host.core_amount      = 1;
342     host.id               = hostname.c_str();
343     host.speed_per_pstate.push_back(cabinet->speed);
344     sg_platf_new_host(&host);
345
346     LinkCreationArgs link;
347     link.policy    = SURF_LINK_FULLDUPLEX;
348     link.latency   = cabinet->lat;
349     link.bandwidth = cabinet->bw;
350     link.id        = "link_" + hostname;
351     sg_platf_new_link(&link);
352
353     s_sg_platf_host_link_cbarg_t host_link;
354     memset(&host_link, 0, sizeof(host_link));
355     host_link.id        = hostname.c_str();
356     host_link.link_up   = bprintf("link_%s_UP",hostname.c_str());
357     host_link.link_down = bprintf("link_%s_DOWN",hostname.c_str());
358     sg_platf_new_hostlink(&host_link);
359     free((char*)host_link.link_up);
360     free((char*)host_link.link_down);
361   }
362   delete cabinet->radicals;
363 }
364
365 void sg_platf_new_storage(sg_platf_storage_cbarg_t storage)
366 {
367   xbt_assert(!xbt_lib_get_or_null(storage_lib, storage->id,ROUTING_STORAGE_LEVEL),
368                "Refusing to add a second storage named \"%s\"", storage->id);
369
370   xbt_assert(storage_types.find(storage->type_id) != storage_types.end(), "No storage type '%s'", storage->type_id);
371   storage_type_t stype = storage_types.at(storage->type_id);
372
373   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'", storage->id, storage->type_id,
374             storage->content);
375
376   xbt_lib_set(storage_lib, storage->id, ROUTING_STORAGE_LEVEL, (void *) xbt_strdup(storage->type_id));
377
378   // if storage content is not specified use the content of storage_type if any
379   if (!strcmp(storage->content, "") && strcmp(stype->content, "")) {
380     storage->content      = stype->content;
381     storage->content_type = stype->content_type;
382     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s) from storage type '%s' ", storage->id,
383               stype->content_type, stype->type_id);
384   }
385
386   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
387             "\n\t\tmodel '%s' \n\t\tcontent '%s'\n\t\tcontent_type '%s' "
388             "\n\t\tproperties '%p''\n",
389             storage->id, stype->model, stype->type_id, storage->content, storage->content_type, storage->properties);
390
391   auto s = surf_storage_model->createStorage(storage->id, stype->type_id, storage->content, storage->content_type,
392                                              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
404 void sg_platf_new_storage_type(sg_platf_storage_type_cbarg_t storage_type)
405 {
406   xbt_assert(storage_types.find(storage_type->id) == storage_types.end(),
407              "Reading a storage type, processing unit \"%s\" already exists", storage_type->id);
408
409   storage_type_t stype = xbt_new0(s_storage_type_t, 1);
410   stype->model = xbt_strdup(storage_type->model);
411   stype->properties = storage_type->properties;
412   stype->content = xbt_strdup(storage_type->content);
413   stype->content_type = xbt_strdup(storage_type->content_type);
414   stype->type_id = xbt_strdup(storage_type->id);
415   stype->size = storage_type->size;
416   stype->model_properties = storage_type->model_properties;
417
418   XBT_DEBUG("ROUTING Create a storage type id '%s' with model '%s', content '%s', and content_type '%s'",
419             stype->type_id, stype->model, storage_type->content, storage_type->content_type);
420
421   storage_types.insert({std::string(stype->type_id), stype});
422 }
423
424 void sg_platf_new_mount(sg_platf_mount_cbarg_t mount){
425   xbt_assert(xbt_lib_get_or_null(storage_lib, mount->storageId, ROUTING_STORAGE_LEVEL),
426       "Cannot mount non-existent disk \"%s\"", mount->storageId);
427
428   XBT_DEBUG("ROUTING Mount '%s' on '%s'",mount->storageId, mount->name);
429
430   if (mount_list.empty())
431     XBT_DEBUG("Create a Mount list for %s", A_surfxml_host_id);
432   mount_list.insert(
433       {std::string(mount->name), surf_storage_resource_priv(surf_storage_resource_by_name(mount->storageId))});
434 }
435
436 void sg_platf_new_route(sg_platf_route_cbarg_t route)
437 {
438   routing_get_current()->addRoute(route);
439 }
440
441 void sg_platf_new_bypassRoute(sg_platf_route_cbarg_t bypassRoute)
442 {
443   routing_get_current()->addBypassRoute(bypassRoute);
444 }
445
446 void sg_platf_new_process(sg_platf_process_cbarg_t process)
447 {
448   sg_host_t host = sg_host_by_name(process->host);
449   if (!host) {
450     // The requested host does not exist. Do a nice message to the user
451     std::string msg = std::string("Cannot create process '") + process->function + "': host '" + process->host +
452                       "' does not exist\nExisting hosts: '";
453     for (auto kv : simgrid::s4u::host_list) {
454       simgrid::s4u::Host* host = kv.second;
455       msg += host->name();
456       msg += "', '";
457       if (msg.length() > 1024) {
458         msg.pop_back(); // remove trailing quote
459         msg += "...(list truncated)......";
460         break;
461       }
462     }
463     xbt_die("%s", msg.c_str());
464   }
465   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(process->function);
466   xbt_assert(factory, "Function '%s' unknown", process->function);
467
468   double start_time = process->start_time;
469   double kill_time  = process->kill_time;
470   int auto_restart = process->on_failure == SURF_ACTOR_ON_FAILURE_DIE ? 0 : 1;
471
472   std::vector<std::string> args(process->argv, process->argv + process->argc);
473   std::function<void()> code = factory(std::move(args));
474
475   smx_process_arg_t arg = nullptr;
476
477   arg = new simgrid::simix::ProcessArg();
478   arg->name = std::string(process->argv[0]);
479   arg->code = code;
480   arg->data = nullptr;
481   arg->host = host;
482   arg->kill_time = kill_time;
483   arg->properties = current_property_set;
484
485   host->extension<simgrid::simix::Host>()->boot_processes.push_back(arg);
486
487   if (start_time > SIMIX_get_clock()) {
488
489     arg = new simgrid::simix::ProcessArg();
490     arg->name = std::string(process->argv[0]);
491     arg->code = std::move(code);
492     arg->data = nullptr;
493     arg->host = host;
494     arg->kill_time = kill_time;
495     arg->properties = current_property_set;
496
497     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->cname(), start_time);
498     SIMIX_timer_set(start_time, [arg, auto_restart]() {
499       smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(arg->code), arg->data,
500                                                                 arg->host, arg->properties, nullptr);
501       if (arg->kill_time >= 0)
502         simcall_process_set_kill_time(actor, arg->kill_time);
503       if (auto_restart)
504         SIMIX_process_auto_restart_set(actor, auto_restart);
505       delete arg;
506     });
507   } else {                      // start_time <= SIMIX_get_clock()
508     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->cname());
509
510     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), std::move(code), nullptr, host,
511                                                               current_property_set, nullptr);
512
513     /* The actor creation will fail if the host is currently dead, but that's fine */
514     if (actor != nullptr) {
515       if (arg->kill_time >= 0)
516         simcall_process_set_kill_time(actor, arg->kill_time);
517       if (auto_restart)
518         SIMIX_process_auto_restart_set(actor, auto_restart);
519     }
520   }
521   current_property_set = nullptr;
522 }
523
524 void sg_platf_new_peer(sg_platf_peer_cbarg_t peer)
525 {
526   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
527   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
528
529   std::vector<double> speedPerPstate;
530   speedPerPstate.push_back(peer->speed);
531   simgrid::s4u::Host* host = as->createHost(peer->id, &speedPerPstate, 1, nullptr);
532
533   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
534
535   /* Change from the defaults */
536   if (peer->state_trace)
537     host->pimpl_cpu->setStateTrace(peer->state_trace);
538   if (peer->speed_trace)
539     host->pimpl_cpu->setSpeedTrace(peer->speed_trace);
540 }
541
542 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
543
544 void sg_platf_end() {
545   simgrid::s4u::onPlatformCreated();
546 }
547
548 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
549 static void surf_config_models_setup()
550 {
551   const char* host_model_name    = xbt_cfg_get_string("host/model");
552   const char* network_model_name = xbt_cfg_get_string("network/model");
553   const char* cpu_model_name     = xbt_cfg_get_string("cpu/model");
554   const char* storage_model_name = xbt_cfg_get_string("storage/model");
555
556   /* The compound host model is needed when using non-default net/cpu models */
557   if ((!xbt_cfg_is_default_value("network/model") || !xbt_cfg_is_default_value("cpu/model")) &&
558       xbt_cfg_is_default_value("host/model")) {
559     host_model_name = "compound";
560     xbt_cfg_set_string("host/model", host_model_name);
561   }
562
563   XBT_DEBUG("host model: %s", host_model_name);
564   if (!strcmp(host_model_name, "compound")) {
565     xbt_assert(cpu_model_name, "Set a cpu model to use with the 'compound' host model");
566     xbt_assert(network_model_name, "Set a network model to use with the 'compound' host model");
567
568     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
569     surf_cpu_model_description[cpu_id].model_init_preparse();
570
571     int network_id = find_model_description(surf_network_model_description, network_model_name);
572     surf_network_model_description[network_id].model_init_preparse();
573   }
574
575   XBT_DEBUG("Call host_model_init");
576   int host_id = find_model_description(surf_host_model_description, host_model_name);
577   surf_host_model_description[host_id].model_init_preparse();
578
579   XBT_DEBUG("Call vm_model_init");
580   surf_vm_model_init_HL13();
581
582   XBT_DEBUG("Call storage_model_init");
583   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
584   surf_storage_model_description[storage_id].model_init_preparse();
585 }
586
587 /**
588  * \brief Add an AS to the platform
589  *
590  * Add a new autonomous system to the platform. Any elements (such as host,
591  * router or sub-AS) added after this call and before the corresponding call
592  * to sg_platf_new_AS_seal() will be added to this AS.
593  *
594  * Once this function was called, the configuration concerning the used
595  * models cannot be changed anymore.
596  *
597  * @param AS the parameters defining the AS to build.
598  */
599 simgrid::s4u::NetZone* sg_platf_new_AS_begin(sg_platf_AS_cbarg_t AS)
600 {
601   if (!surf_parse_models_setup_already_called) {
602     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
603      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
604      *
605      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
606      * (FIXME: check it out by creating a file beginning with one of these tags)
607      * but cluster and peer create ASes internally, so putting the code in there is ok.
608      */
609     surf_parse_models_setup_already_called = 1;
610     surf_config_models_setup();
611   }
612
613   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
614                             * any further config now that we created some real content */
615
616   /* search the routing model */
617   simgrid::kernel::routing::NetZoneImpl* new_as = nullptr;
618   switch(AS->routing){
619     case A_surfxml_AS_routing_Cluster:
620       new_as = new simgrid::kernel::routing::ClusterZone(current_routing, AS->id);
621       break;
622     case A_surfxml_AS_routing_ClusterDragonfly:
623       new_as = new simgrid::kernel::routing::DragonflyZone(current_routing, AS->id);
624       break;
625     case A_surfxml_AS_routing_ClusterTorus:
626       new_as = new simgrid::kernel::routing::TorusZone(current_routing, AS->id);
627       break;
628     case A_surfxml_AS_routing_ClusterFatTree:
629       new_as = new simgrid::kernel::routing::FatTreeZone(current_routing, AS->id);
630       break;
631     case A_surfxml_AS_routing_Dijkstra:
632       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 0);
633       break;
634     case A_surfxml_AS_routing_DijkstraCache:
635       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 1);
636       break;
637     case A_surfxml_AS_routing_Floyd:
638       new_as = new simgrid::kernel::routing::FloydZone(current_routing, AS->id);
639       break;
640     case A_surfxml_AS_routing_Full:
641       new_as = new simgrid::kernel::routing::FullZone(current_routing, AS->id);
642       break;
643     case A_surfxml_AS_routing_None:
644       new_as = new simgrid::kernel::routing::EmptyZone(current_routing, AS->id);
645       break;
646     case A_surfxml_AS_routing_Vivaldi:
647       new_as = new simgrid::kernel::routing::VivaldiZone(current_routing, AS->id);
648       break;
649     default:
650       xbt_die("Not a valid model!");
651       break;
652   }
653
654   if (current_routing == nullptr) { /* it is the first one */
655     xbt_assert(simgrid::s4u::Engine::instance()->pimpl->netRoot_ == nullptr,
656                "All defined components must belong to a AS");
657     simgrid::s4u::Engine::instance()->pimpl->netRoot_ = new_as;
658
659   } else {
660     /* set the father behavior */
661     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
662       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
663     /* add to the sons dictionary */
664     current_routing->children()->push_back(static_cast<simgrid::s4u::NetZone*>(new_as));
665   }
666
667   /* set the new current component of the tree */
668   current_routing = new_as;
669
670   if (TRACE_is_enabled())
671     sg_instr_AS_begin(AS);
672
673   return new_as;
674 }
675
676 /**
677  * \brief Specify that the description of the current AS is finished
678  *
679  * Once you've declared all the content of your AS, you have to seal
680  * it with this call. Your AS is not usable until you call this function.
681  */
682 void sg_platf_new_AS_seal()
683 {
684   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
685   current_routing->seal();
686   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->father());
687
688   if (TRACE_is_enabled())
689     sg_instr_AS_end();
690 }
691
692 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
693 void sg_platf_new_hostlink(sg_platf_host_link_cbarg_t hostlink)
694 {
695   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id)->pimpl_netpoint;
696   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id);
697   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
698              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
699
700   simgrid::surf::LinkImpl* linkUp   = simgrid::surf::LinkImpl::byName(hostlink->link_up);
701   simgrid::surf::LinkImpl* linkDown = simgrid::surf::LinkImpl::byName(hostlink->link_down);
702
703   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up);
704   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down);
705
706   auto as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
707
708   if (as_cluster->privateLinks_.find(netpoint->id()) != as_cluster->privateLinks_.end())
709     surf_parse_error("Host_link for '%s' is already defined!",hostlink->id);
710
711   XBT_DEBUG("Push Host_link for host '%s' to position %d", netpoint->cname(), netpoint->id());
712   as_cluster->privateLinks_.insert({netpoint->id(), {linkUp, linkDown}});
713 }
714
715 void sg_platf_new_trace(sg_platf_trace_cbarg_t trace)
716 {
717   tmgr_trace_t tmgr_trace;
718   if (trace->file && strcmp(trace->file, "") != 0) {
719     tmgr_trace = tmgr_trace_new_from_file(trace->file);
720   } else {
721     xbt_assert(strcmp(trace->pc_data, ""),
722         "Trace '%s' must have either a content, or point to a file on disk.",trace->id);
723     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
724   }
725   xbt_dict_set(traces_set_list, trace->id, static_cast<void*>(tmgr_trace), nullptr);
726 }