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[simgrid.git] / src / surf / sg_platf.cpp
1
2 /* This program is free software; you can redistribute it and/or modify it
3  * under the terms of the license (GNU LGPL) which comes with this package. */
4
5 #include "simgrid/s4u/engine.hpp"
6
7 #include "src/kernel/EngineImpl.hpp"
8 #include "src/simix/smx_private.h"
9
10 #include "src/include/simgrid/sg_config.h"
11
12 #include "src/surf/HostImpl.hpp"
13 #include "src/surf/cpu_interface.hpp"
14 #include "src/surf/network_interface.hpp"
15
16 #include "src/kernel/routing/ClusterZone.hpp"
17 #include "src/kernel/routing/DijkstraZone.hpp"
18 #include "src/kernel/routing/DragonflyZone.hpp"
19 #include "src/kernel/routing/EmptyZone.hpp"
20 #include "src/kernel/routing/FatTreeZone.hpp"
21 #include "src/kernel/routing/FloydZone.hpp"
22 #include "src/kernel/routing/FullZone.hpp"
23 #include "src/kernel/routing/NetPoint.hpp"
24 #include "src/kernel/routing/NetZoneImpl.hpp"
25 #include "src/kernel/routing/TorusZone.hpp"
26 #include "src/kernel/routing/VivaldiZone.hpp"
27
28 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_parse);
29
30 XBT_PRIVATE xbt_dynar_t mount_list = nullptr;
31
32 namespace simgrid {
33 namespace surf {
34
35 simgrid::xbt::signal<void(sg_platf_cluster_cbarg_t)> on_cluster;
36
37 }
38 }
39
40 static int surf_parse_models_setup_already_called = 0;
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
53 /** Module management function: frees all internal data structures */
54 void sg_platf_exit() {
55   simgrid::surf::on_cluster.disconnect_all_slots();
56   simgrid::s4u::onPlatformCreated.disconnect_all_slots();
57
58   /* make sure that we will reinit the models while loading the platf once reinited */
59   surf_parse_models_setup_already_called = 0;
60   surf_parse_lex_destroy();
61 }
62
63 /** @brief Add an host to the current AS */
64 void sg_platf_new_host(sg_platf_host_cbarg_t args)
65 {
66   std::unordered_map<std::string, std::string> props;
67   if (args->properties) {
68     xbt_dict_cursor_t cursor=nullptr;
69     char *key,*data;
70     xbt_dict_foreach (args->properties, cursor, key, data)
71       props[key] = data;
72     xbt_dict_free(&args->properties);
73   }
74
75   simgrid::s4u::Host* host =
76       routing_get_current()->createHost(args->id, &args->speed_per_pstate, args->core_amount, &props);
77
78   host->pimpl_->storage_ = mount_list;
79   xbt_lib_set(storage_lib, args->id, ROUTING_STORAGE_HOST_LEVEL, static_cast<void*>(mount_list));
80   mount_list = nullptr;
81
82   /* Change from the defaults */
83   if (args->state_trace)
84     host->pimpl_cpu->setStateTrace(args->state_trace);
85   if (args->speed_trace)
86     host->pimpl_cpu->setSpeedTrace(args->speed_trace);
87   if (args->pstate != 0)
88     host->pimpl_cpu->setPState(args->pstate);
89   if (args->coord && strcmp(args->coord, ""))
90     new simgrid::kernel::routing::vivaldi::Coords(host->pimpl_netpoint, args->coord);
91
92   if (TRACE_is_enabled() && TRACE_needs_platform())
93     sg_instr_new_host(*host);
94 }
95
96 /** @brief Add a "router" to the network element list */
97 simgrid::kernel::routing::NetPoint* sg_platf_new_router(const char* name, const char* coords)
98 {
99   simgrid::kernel::routing::NetZoneImpl* current_routing = routing_get_current();
100
101   if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
102     current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::base;
103   xbt_assert(nullptr == simgrid::s4u::Engine::instance()->netpointByNameOrNull(name),
104              "Refusing to create a router named '%s': this name already describes a node.", name);
105
106   simgrid::kernel::routing::NetPoint* netpoint =
107       new simgrid::kernel::routing::NetPoint(name, simgrid::kernel::routing::NetPoint::Type::Router, current_routing);
108   XBT_DEBUG("Router '%s' has the id %d", name, netpoint->id());
109
110   if (coords && strcmp(coords, ""))
111     new simgrid::kernel::routing::vivaldi::Coords(netpoint, coords);
112
113   sg_instr_new_router(name);
114
115   return netpoint;
116 }
117
118 void sg_platf_new_link(sg_platf_link_cbarg_t link){
119   std::vector<char*> names;
120
121   if (link->policy == SURF_LINK_FULLDUPLEX) {
122     names.push_back(bprintf("%s_UP", link->id));
123     names.push_back(bprintf("%s_DOWN", link->id));
124   } else {
125     names.push_back(xbt_strdup(link->id));
126   }
127   for (auto link_name : names) {
128     Link* l = surf_network_model->createLink(link_name, link->bandwidth, link->latency, link->policy);
129
130     if (link->properties) {
131       xbt_dict_cursor_t cursor = nullptr;
132       char *key, *data;
133       xbt_dict_foreach (link->properties, cursor, key, data)
134         l->setProperty(key, data);
135       xbt_dict_free(&link->properties);
136     }
137
138     if (link->latency_trace)
139       l->setLatencyTrace(link->latency_trace);
140     if (link->bandwidth_trace)
141       l->setBandwidthTrace(link->bandwidth_trace);
142     if (link->state_trace)
143       l->setStateTrace(link->state_trace);
144
145     xbt_free(link_name);
146   }
147 }
148
149 void sg_platf_new_cluster(sg_platf_cluster_cbarg_t cluster)
150 {
151   using simgrid::kernel::routing::ClusterZone;
152   using simgrid::kernel::routing::DragonflyZone;
153   using simgrid::kernel::routing::FatTreeZone;
154   using simgrid::kernel::routing::TorusZone;
155
156   int rankId=0;
157
158   s_sg_platf_link_cbarg_t link;
159
160   // What an inventive way of initializing the AS that I have as ancestor :-(
161   s_sg_platf_AS_cbarg_t AS;
162   AS.id = cluster->id;
163   switch (cluster->topology) {
164   case SURF_CLUSTER_TORUS:
165     AS.routing = A_surfxml_AS_routing_ClusterTorus;
166     break;
167   case SURF_CLUSTER_DRAGONFLY:
168     AS.routing = A_surfxml_AS_routing_ClusterDragonfly;
169     break;
170   case SURF_CLUSTER_FAT_TREE:
171     AS.routing = A_surfxml_AS_routing_ClusterFatTree;
172     break;
173   default:
174     AS.routing = A_surfxml_AS_routing_Cluster;
175     break;
176   }
177   sg_platf_new_AS_begin(&AS);
178   simgrid::kernel::routing::ClusterZone* current_as = static_cast<ClusterZone*>(routing_get_current());
179   current_as->parse_specific_arguments(cluster);
180
181   if(cluster->loopback_bw!=0 || cluster->loopback_lat!=0){
182     current_as->linkCountPerNode_++;
183     current_as->hasLoopback_ = 1;
184   }
185
186   if(cluster->limiter_link!=0){
187     current_as->linkCountPerNode_++;
188     current_as->hasLimiter_ = 1;
189   }
190
191   for (int i : *cluster->radicals) {
192     char * host_id = bprintf("%s%d%s", cluster->prefix, i, cluster->suffix);
193     char * link_id = bprintf("%s_link_%d", cluster->id, i);
194
195     XBT_DEBUG("<host\tid=\"%s\"\tpower=\"%f\">", host_id, cluster->speed);
196
197     s_sg_platf_host_cbarg_t host;
198     memset(&host, 0, sizeof(host));
199     host.id = host_id;
200     if ((cluster->properties != nullptr) && (!xbt_dict_is_empty(cluster->properties))) {
201       xbt_dict_cursor_t cursor=nullptr;
202       char *key,*data;
203       host.properties = xbt_dict_new_homogeneous(free);
204
205       xbt_dict_foreach(cluster->properties,cursor,key,data) {
206         xbt_dict_set(host.properties, key, xbt_strdup(data), nullptr);
207       }
208     }
209
210     host.speed_per_pstate.push_back(cluster->speed);
211     host.pstate = 0;
212     host.core_amount = cluster->core_amount;
213     host.coord = "";
214     sg_platf_new_host(&host);
215     XBT_DEBUG("</host>");
216
217     XBT_DEBUG("<link\tid=\"%s\"\tbw=\"%f\"\tlat=\"%f\"/>", link_id, cluster->bw, cluster->lat);
218
219     // All links are saved in a matrix;
220     // every row describes a single node; every node may have multiple links.
221     // the first column may store a link from x to x if p_has_loopback is set
222     // the second column may store a limiter link if p_has_limiter is set
223     // other columns are to store one or more link for the node
224
225     //add a loopback link
226     Link* linkUp   = nullptr;
227     Link* linkDown = nullptr;
228     if(cluster->loopback_bw!=0 || cluster->loopback_lat!=0){
229       char *tmp_link = bprintf("%s_loopback", link_id);
230       XBT_DEBUG("<loopback\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->loopback_bw);
231
232       memset(&link, 0, sizeof(link));
233       link.id        = tmp_link;
234       link.bandwidth = cluster->loopback_bw;
235       link.latency   = cluster->loopback_lat;
236       link.policy    = SURF_LINK_FATPIPE;
237       sg_platf_new_link(&link);
238       linkUp   = Link::byName(tmp_link);
239       linkDown = Link::byName(tmp_link);
240       free(tmp_link);
241
242       auto as_cluster = static_cast<ClusterZone*>(current_as);
243       as_cluster->privateLinks_.insert({rankId * as_cluster->linkCountPerNode_, {linkUp, linkDown}});
244     }
245
246     //add a limiter link (shared link to account for maximal bandwidth of the node)
247     linkUp   = nullptr;
248     linkDown = nullptr;
249     if(cluster->limiter_link!=0){
250       char *tmp_link = bprintf("%s_limiter", link_id);
251       XBT_DEBUG("<limiter\tid=\"%s\"\tbw=\"%f\"/>", tmp_link, cluster->limiter_link);
252
253       memset(&link, 0, sizeof(link));
254       link.id = tmp_link;
255       link.bandwidth = cluster->limiter_link;
256       link.latency = 0;
257       link.policy = SURF_LINK_SHARED;
258       sg_platf_new_link(&link);
259       linkUp = linkDown = Link::byName(tmp_link);
260       free(tmp_link);
261       current_as->privateLinks_.insert(
262           {rankId * current_as->linkCountPerNode_ + current_as->hasLoopback_, {linkUp, linkDown}});
263     }
264
265     //call the cluster function that adds the others links
266     if (cluster->topology == SURF_CLUSTER_FAT_TREE) {
267       static_cast<FatTreeZone*>(current_as)->addProcessingNode(i);
268     }
269     else {
270       current_as->create_links_for_node(cluster, i, rankId,
271           rankId*current_as->linkCountPerNode_ + current_as->hasLoopback_ + current_as->hasLimiter_ );
272     }
273     xbt_free(link_id);
274     xbt_free(host_id);
275     rankId++;
276   }
277
278   // Add a router.
279   XBT_DEBUG(" ");
280   XBT_DEBUG("<router id=\"%s\"/>", cluster->router_id);
281   if (!cluster->router_id || !strcmp(cluster->router_id, "")) {
282     char* newid         = bprintf("%s%s_router%s", cluster->prefix, cluster->id, cluster->suffix);
283     current_as->router_ = sg_platf_new_router(newid, NULL);
284     free(newid);
285   } else {
286     current_as->router_ = sg_platf_new_router(cluster->router_id, NULL);
287   }
288
289   //Make the backbone
290   if ((cluster->bb_bw != 0) || (cluster->bb_lat != 0)) {
291
292     memset(&link, 0, sizeof(link));
293     link.id        = bprintf("%s_backbone", cluster->id);
294     link.bandwidth = cluster->bb_bw;
295     link.latency   = cluster->bb_lat;
296     link.policy    = cluster->bb_sharing_policy;
297
298     XBT_DEBUG("<link\tid=\"%s\" bw=\"%f\" lat=\"%f\"/>", link.id, cluster->bb_bw, cluster->bb_lat);
299     sg_platf_new_link(&link);
300
301     routing_cluster_add_backbone(Link::byName(link.id));
302     free((char*)link.id);
303   }
304
305   XBT_DEBUG("</AS>");
306   sg_platf_new_AS_seal();
307
308   simgrid::surf::on_cluster(cluster);
309   delete cluster->radicals;
310 }
311 void routing_cluster_add_backbone(simgrid::surf::LinkImpl* bb)
312 {
313   simgrid::kernel::routing::ClusterZone* cluster =
314       dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
315
316   xbt_assert(cluster, "Only hosts from Cluster can get a backbone.");
317   xbt_assert(nullptr == cluster->backbone_, "Cluster %s already has a backbone link!", cluster->name());
318
319   cluster->backbone_ = bb;
320   XBT_DEBUG("Add a backbone to AS '%s'", current_routing->name());
321 }
322
323 void sg_platf_new_cabinet(sg_platf_cabinet_cbarg_t cabinet)
324 {
325   for (int radical : *cabinet->radicals) {
326     char *hostname = bprintf("%s%d%s", cabinet->prefix, radical, cabinet->suffix);
327     s_sg_platf_host_cbarg_t host;
328     memset(&host, 0, sizeof(host));
329     host.pstate           = 0;
330     host.core_amount      = 1;
331     host.id               = hostname;
332     host.speed_per_pstate.push_back(cabinet->speed);
333     sg_platf_new_host(&host);
334
335     s_sg_platf_link_cbarg_t link;
336     memset(&link, 0, sizeof(link));
337     link.policy    = SURF_LINK_FULLDUPLEX;
338     link.latency   = cabinet->lat;
339     link.bandwidth = cabinet->bw;
340     link.id        = bprintf("link_%s",hostname);
341     sg_platf_new_link(&link);
342     free((char*)link.id);
343
344     s_sg_platf_host_link_cbarg_t host_link;
345     memset(&host_link, 0, sizeof(host_link));
346     host_link.id        = hostname;
347     host_link.link_up   = bprintf("link_%s_UP",hostname);
348     host_link.link_down = bprintf("link_%s_DOWN",hostname);
349     sg_platf_new_hostlink(&host_link);
350     free((char*)host_link.link_up);
351     free((char*)host_link.link_down);
352
353     free(hostname);
354   }
355   delete cabinet->radicals;
356 }
357
358 void sg_platf_new_storage(sg_platf_storage_cbarg_t storage)
359 {
360   xbt_assert(!xbt_lib_get_or_null(storage_lib, storage->id,ROUTING_STORAGE_LEVEL),
361                "Refusing to add a second storage named \"%s\"", storage->id);
362
363   void* stype = xbt_lib_get_or_null(storage_type_lib, storage->type_id,ROUTING_STORAGE_TYPE_LEVEL);
364   xbt_assert(stype,"No storage type '%s'", storage->type_id);
365
366   XBT_DEBUG("ROUTING Create a storage name '%s' with type_id '%s' and content '%s'",
367       storage->id,
368       storage->type_id,
369       storage->content);
370
371   xbt_lib_set(storage_lib, storage->id, ROUTING_STORAGE_LEVEL, (void *) xbt_strdup(storage->type_id));
372
373   // if storage content is not specified use the content of storage_type if any
374   if(!strcmp(storage->content,"") && strcmp(((storage_type_t) stype)->content,"")){
375     storage->content = ((storage_type_t) stype)->content;
376     storage->content_type = ((storage_type_t) stype)->content_type;
377     XBT_DEBUG("For disk '%s' content is empty, inherit the content (of type %s) from storage type '%s' ",
378         storage->id,((storage_type_t) stype)->content_type,
379         ((storage_type_t) stype)->type_id);
380   }
381
382   XBT_DEBUG("SURF storage create resource\n\t\tid '%s'\n\t\ttype '%s' "
383       "\n\t\tmodel '%s' \n\t\tcontent '%s'\n\t\tcontent_type '%s' "
384       "\n\t\tproperties '%p''\n",
385       storage->id,
386       ((storage_type_t) stype)->model,
387       ((storage_type_t) stype)->type_id,
388       storage->content,
389       storage->content_type,
390     storage->properties);
391
392   auto s = surf_storage_model->createStorage(storage->id, ((storage_type_t)stype)->type_id, storage->content,
393                                              storage->content_type, storage->attach);
394
395   if (storage->properties) {
396     xbt_dict_cursor_t cursor = nullptr;
397     char *key, *data;
398     xbt_dict_foreach (storage->properties, cursor, key, data)
399       s->setProperty(key, data);
400     xbt_dict_free(&storage->properties);
401   }
402 }
403 void sg_platf_new_storage_type(sg_platf_storage_type_cbarg_t storage_type){
404
405   xbt_assert(!xbt_lib_get_or_null(storage_type_lib, storage_type->id,ROUTING_STORAGE_TYPE_LEVEL),
406                "Reading a storage type, processing unit \"%s\" already exists", storage_type->id);
407
408   storage_type_t stype = xbt_new0(s_storage_type_t, 1);
409   stype->model = xbt_strdup(storage_type->model);
410   stype->properties = storage_type->properties;
411   stype->content = xbt_strdup(storage_type->content);
412   stype->content_type = xbt_strdup(storage_type->content_type);
413   stype->type_id = xbt_strdup(storage_type->id);
414   stype->size = storage_type->size;
415   stype->model_properties = storage_type->model_properties;
416
417   XBT_DEBUG("ROUTING Create a storage type id '%s' with model '%s', "
418       "content '%s', and content_type '%s'",
419       stype->type_id,
420       stype->model,
421       storage_type->content,
422       storage_type->content_type);
423
424   xbt_lib_set(storage_type_lib,
425       stype->type_id,
426       ROUTING_STORAGE_TYPE_LEVEL,
427       (void *) stype);
428 }
429
430 static void mount_free(void *p)
431 {
432   mount_t mnt = (mount_t) p;
433   xbt_free(mnt->name);
434 }
435
436 void sg_platf_new_mount(sg_platf_mount_cbarg_t mount){
437   xbt_assert(xbt_lib_get_or_null(storage_lib, mount->storageId, ROUTING_STORAGE_LEVEL),
438       "Cannot mount non-existent disk \"%s\"", mount->storageId);
439
440   XBT_DEBUG("ROUTING Mount '%s' on '%s'",mount->storageId, mount->name);
441
442   s_mount_t mnt;
443   mnt.storage = surf_storage_resource_priv(surf_storage_resource_by_name(mount->storageId));
444   mnt.name = xbt_strdup(mount->name);
445
446   if(!mount_list){
447     XBT_DEBUG("Create a Mount list for %s",A_surfxml_host_id);
448     mount_list = xbt_dynar_new(sizeof(s_mount_t), mount_free);
449   }
450   xbt_dynar_push(mount_list, &mnt);
451 }
452
453 void sg_platf_new_route(sg_platf_route_cbarg_t route)
454 {
455   routing_get_current()->addRoute(route);
456 }
457
458 void sg_platf_new_bypassRoute(sg_platf_route_cbarg_t bypassRoute)
459 {
460   routing_get_current()->addBypassRoute(bypassRoute);
461 }
462
463 void sg_platf_new_process(sg_platf_process_cbarg_t process)
464 {
465   sg_host_t host = sg_host_by_name(process->host);
466   if (!host) {
467     // The requested host does not exist. Do a nice message to the user
468     char *tmp = bprintf("Cannot create process '%s': host '%s' does not exist\nExisting hosts: '",process->function, process->host);
469     xbt_strbuff_t msg = xbt_strbuff_new_from(tmp);
470     free(tmp);
471     xbt_dynar_t all_hosts = xbt_dynar_sort_strings(sg_hosts_as_dynar());
472     simgrid::s4u::Host* host;
473     unsigned int cursor;
474     xbt_dynar_foreach(all_hosts,cursor, host) {
475       xbt_strbuff_append(msg, host->cname());
476       xbt_strbuff_append(msg,"', '");
477       if (msg->used > 1024) {
478         msg->data[msg->used-3]='\0';
479         msg->used -= 3;
480
481         xbt_strbuff_append(msg," ...(list truncated)......");// That will be shortened by 3 chars when existing the loop
482         break;
483       }
484     }
485     msg->data[msg->used-3]='\0';
486     xbt_die("%s", msg->data);
487   }
488   simgrid::simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(process->function);
489   xbt_assert(factory, "Function '%s' unknown", process->function);
490
491   double start_time = process->start_time;
492   double kill_time  = process->kill_time;
493   int auto_restart = process->on_failure == SURF_PROCESS_ON_FAILURE_DIE ? 0 : 1;
494
495   std::vector<std::string> args(process->argv, process->argv + process->argc);
496   std::function<void()> code = factory(std::move(args));
497
498   smx_process_arg_t arg = nullptr;
499   smx_actor_t process_created = nullptr;
500
501   arg = new simgrid::simix::ProcessArg();
502   arg->name = std::string(process->argv[0]);
503   arg->code = code;
504   arg->data = nullptr;
505   arg->host = host;
506   arg->kill_time = kill_time;
507   arg->properties = current_property_set;
508
509   sg_host_simix(host)->boot_processes.push_back(arg);
510
511   if (start_time > SIMIX_get_clock()) {
512
513     arg = new simgrid::simix::ProcessArg();
514     arg->name = std::string(process->argv[0]);
515     arg->code = std::move(code);
516     arg->data = nullptr;
517     arg->host = host;
518     arg->kill_time = kill_time;
519     arg->properties = current_property_set;
520
521     XBT_DEBUG("Process %s@%s will be started at time %f", arg->name.c_str(), arg->host->cname(), start_time);
522     SIMIX_timer_set(start_time, [=]() {
523       simix_global->create_process_function(
524                                             arg->name.c_str(),
525                                             std::move(arg->code),
526                                             arg->data,
527                                             arg->host,
528                                             arg->kill_time,
529                                             arg->properties,
530                                             arg->auto_restart,
531                                             nullptr);
532       delete arg;
533     });
534   } else {                      // start_time <= SIMIX_get_clock()
535     XBT_DEBUG("Starting Process %s(%s) right now", arg->name.c_str(), host->cname());
536
537     process_created = simix_global->create_process_function(
538         arg->name.c_str(), std::move(code), nullptr,
539         host, kill_time,
540         current_property_set, auto_restart, nullptr);
541
542     /* verify if process has been created (won't be the case if the host is currently dead, but that's fine) */
543     if (!process_created) {
544       return;
545     }
546   }
547   current_property_set = nullptr;
548 }
549
550 void sg_platf_new_peer(sg_platf_peer_cbarg_t peer)
551 {
552   simgrid::kernel::routing::VivaldiZone* as = dynamic_cast<simgrid::kernel::routing::VivaldiZone*>(current_routing);
553   xbt_assert(as, "<peer> tag can only be used in Vivaldi netzones.");
554
555   std::vector<double> speedPerPstate;
556   speedPerPstate.push_back(peer->speed);
557   simgrid::s4u::Host* host = as->createHost(peer->id, &speedPerPstate, 1, nullptr);
558
559   as->setPeerLink(host->pimpl_netpoint, peer->bw_in, peer->bw_out, peer->coord);
560
561   /* Change from the defaults */
562   if (peer->state_trace)
563     host->pimpl_cpu->setStateTrace(peer->state_trace);
564   if (peer->speed_trace)
565     host->pimpl_cpu->setSpeedTrace(peer->speed_trace);
566 }
567
568 void sg_platf_begin() { /* Do nothing: just for symmetry of user code */ }
569
570 void sg_platf_end() {
571   simgrid::s4u::onPlatformCreated();
572 }
573
574 /* Pick the right models for CPU, net and host, and call their model_init_preparse */
575 static void surf_config_models_setup()
576 {
577   const char* host_model_name    = xbt_cfg_get_string("host/model");
578   const char* network_model_name = xbt_cfg_get_string("network/model");
579   const char* cpu_model_name     = xbt_cfg_get_string("cpu/model");
580   const char* storage_model_name = xbt_cfg_get_string("storage/model");
581
582   /* The compound host model is needed when using non-default net/cpu models */
583   if ((!xbt_cfg_is_default_value("network/model") || !xbt_cfg_is_default_value("cpu/model")) &&
584       xbt_cfg_is_default_value("host/model")) {
585     host_model_name = "compound";
586     xbt_cfg_set_string("host/model", host_model_name);
587   }
588
589   XBT_DEBUG("host model: %s", host_model_name);
590   if (!strcmp(host_model_name, "compound")) {
591     xbt_assert(cpu_model_name, "Set a cpu model to use with the 'compound' host model");
592     xbt_assert(network_model_name, "Set a network model to use with the 'compound' host model");
593
594     int cpu_id = find_model_description(surf_cpu_model_description, cpu_model_name);
595     surf_cpu_model_description[cpu_id].model_init_preparse();
596
597     int network_id = find_model_description(surf_network_model_description, network_model_name);
598     surf_network_model_description[network_id].model_init_preparse();
599   }
600
601   XBT_DEBUG("Call host_model_init");
602   int host_id = find_model_description(surf_host_model_description, host_model_name);
603   surf_host_model_description[host_id].model_init_preparse();
604
605   XBT_DEBUG("Call vm_model_init");
606   surf_vm_model_init_HL13();
607
608   XBT_DEBUG("Call storage_model_init");
609   int storage_id = find_model_description(surf_storage_model_description, storage_model_name);
610   surf_storage_model_description[storage_id].model_init_preparse();
611 }
612
613 /**
614  * \brief Add an AS to the platform
615  *
616  * Add a new autonomous system to the platform. Any elements (such as host,
617  * router or sub-AS) added after this call and before the corresponding call
618  * to sg_platf_new_AS_seal() will be added to this AS.
619  *
620  * Once this function was called, the configuration concerning the used
621  * models cannot be changed anymore.
622  *
623  * @param AS the parameters defining the AS to build.
624  */
625 simgrid::s4u::NetZone* sg_platf_new_AS_begin(sg_platf_AS_cbarg_t AS)
626 {
627   if (!surf_parse_models_setup_already_called) {
628     /* Initialize the surf models. That must be done after we got all config, and before we need the models.
629      * That is, after the last <config> tag, if any, and before the first of cluster|peer|AS|trace|trace_connect
630      *
631      * I'm not sure for <trace> and <trace_connect>, there may be a bug here
632      * (FIXME: check it out by creating a file beginning with one of these tags)
633      * but cluster and peer create ASes internally, so putting the code in there is ok.
634      */
635     surf_parse_models_setup_already_called = 1;
636     surf_config_models_setup();
637   }
638
639   _sg_cfg_init_status = 2; /* HACK: direct access to the global controlling the level of configuration to prevent
640                             * any further config now that we created some real content */
641
642
643   /* search the routing model */
644   simgrid::kernel::routing::NetZoneImpl* new_as = nullptr;
645   switch(AS->routing){
646     case A_surfxml_AS_routing_Cluster:
647       new_as = new simgrid::kernel::routing::ClusterZone(current_routing, AS->id);
648       break;
649     case A_surfxml_AS_routing_ClusterDragonfly:
650       new_as = new simgrid::kernel::routing::DragonflyZone(current_routing, AS->id);
651       break;
652     case A_surfxml_AS_routing_ClusterTorus:
653       new_as = new simgrid::kernel::routing::TorusZone(current_routing, AS->id);
654       break;
655     case A_surfxml_AS_routing_ClusterFatTree:
656       new_as = new simgrid::kernel::routing::FatTreeZone(current_routing, AS->id);
657       break;
658     case A_surfxml_AS_routing_Dijkstra:
659       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 0);
660       break;
661     case A_surfxml_AS_routing_DijkstraCache:
662       new_as = new simgrid::kernel::routing::DijkstraZone(current_routing, AS->id, 1);
663       break;
664     case A_surfxml_AS_routing_Floyd:
665       new_as = new simgrid::kernel::routing::FloydZone(current_routing, AS->id);
666       break;
667     case A_surfxml_AS_routing_Full:
668       new_as = new simgrid::kernel::routing::FullZone(current_routing, AS->id);
669       break;
670     case A_surfxml_AS_routing_None:
671       new_as = new simgrid::kernel::routing::EmptyZone(current_routing, AS->id);
672       break;
673     case A_surfxml_AS_routing_Vivaldi:
674       new_as = new simgrid::kernel::routing::VivaldiZone(current_routing, AS->id);
675       break;
676     default:
677       xbt_die("Not a valid model!");
678       break;
679   }
680
681   if (current_routing == nullptr) { /* it is the first one */
682     xbt_assert(simgrid::s4u::Engine::instance()->pimpl->netRoot_ == nullptr,
683                "All defined components must belong to a AS");
684     simgrid::s4u::Engine::instance()->pimpl->netRoot_ = new_as;
685
686   } else {
687     /* set the father behavior */
688     if (current_routing->hierarchy_ == simgrid::kernel::routing::NetZoneImpl::RoutingMode::unset)
689       current_routing->hierarchy_ = simgrid::kernel::routing::NetZoneImpl::RoutingMode::recursive;
690     /* add to the sons dictionary */
691     xbt_dict_set(current_routing->children(), AS->id, (void *) new_as, nullptr);
692   }
693
694   /* set the new current component of the tree */
695   current_routing = new_as;
696
697   if (TRACE_is_enabled())
698     sg_instr_AS_begin(AS);
699
700   return new_as;
701 }
702
703 /**
704  * \brief Specify that the description of the current AS is finished
705  *
706  * Once you've declared all the content of your AS, you have to seal
707  * it with this call. Your AS is not usable until you call this function.
708  */
709 void sg_platf_new_AS_seal()
710 {
711   xbt_assert(current_routing, "Cannot seal the current AS: none under construction");
712   current_routing->seal();
713   current_routing = static_cast<simgrid::kernel::routing::NetZoneImpl*>(current_routing->father());
714
715   if (TRACE_is_enabled())
716     sg_instr_AS_end();
717 }
718
719 /** @brief Add a link connecting an host to the rest of its AS (which must be cluster or vivaldi) */
720 void sg_platf_new_hostlink(sg_platf_host_link_cbarg_t hostlink)
721 {
722   simgrid::kernel::routing::NetPoint* netpoint = sg_host_by_name(hostlink->id)->pimpl_netpoint;
723   xbt_assert(netpoint, "Host '%s' not found!", hostlink->id);
724   xbt_assert(dynamic_cast<simgrid::kernel::routing::ClusterZone*>(current_routing),
725              "Only hosts from Cluster and Vivaldi ASes can get an host_link.");
726
727   simgrid::surf::LinkImpl* linkUp   = Link::byName(hostlink->link_up);
728   simgrid::surf::LinkImpl* linkDown = Link::byName(hostlink->link_down);
729
730   xbt_assert(linkUp, "Link '%s' not found!", hostlink->link_up);
731   xbt_assert(linkDown, "Link '%s' not found!", hostlink->link_down);
732
733   auto as_cluster = static_cast<simgrid::kernel::routing::ClusterZone*>(current_routing);
734
735   if (as_cluster->privateLinks_.find(netpoint->id()) != as_cluster->privateLinks_.end())
736     surf_parse_error("Host_link for '%s' is already defined!",hostlink->id);
737
738   XBT_DEBUG("Push Host_link for host '%s' to position %d", netpoint->cname(), netpoint->id());
739   as_cluster->privateLinks_.insert({netpoint->id(), {linkUp, linkDown}});
740 }
741
742 void sg_platf_new_trace(sg_platf_trace_cbarg_t trace)
743 {
744   tmgr_trace_t tmgr_trace;
745   if (trace->file && strcmp(trace->file, "") != 0) {
746     tmgr_trace = tmgr_trace_new_from_file(trace->file);
747   } else {
748     xbt_assert(strcmp(trace->pc_data, ""),
749         "Trace '%s' must have either a content, or point to a file on disk.",trace->id);
750     tmgr_trace = tmgr_trace_new_from_string(trace->id, trace->pc_data, trace->periodicity);
751   }
752   xbt_dict_set(traces_set_list, trace->id, static_cast<void*>(tmgr_trace), nullptr);
753 }