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Remove unused type definitions.
[simgrid.git] / src / instr / instr_platform.cpp
1 /* Copyright (c) 2010-2019. The SimGrid Team. All rights reserved.          */
2
3 /* This program is free software; you can redistribute it and/or modify it
4  * under the terms of the license (GNU LGPL) which comes with this package. */
5
6 #include "src/instr/instr_private.hpp"
7
8 #include "simgrid/kernel/routing/NetPoint.hpp"
9 #include "simgrid/kernel/routing/NetZoneImpl.hpp"
10 #include "simgrid/s4u/Actor.hpp"
11 #include "simgrid/s4u/Comm.hpp"
12 #include "simgrid/s4u/Engine.hpp"
13 #include "simgrid/s4u/Exec.hpp"
14 #include "simgrid/s4u/Host.hpp"
15 #include "simgrid/s4u/VirtualMachine.hpp"
16 #include "src/surf/cpu_interface.hpp"
17 #include "src/surf/network_interface.hpp"
18 #include "src/surf/surf_interface.hpp"
19 #include "src/surf/xml/platf_private.hpp"
20 #include "surf/surf.hpp"
21 #include "xbt/graph.h"
22
23 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(instr_routing, instr, "Tracing platform hierarchy");
24
25 static std::vector<simgrid::instr::NetZoneContainer*> currentContainer; /* push and pop, used only in creation */
26
27 static const char* instr_node_name(xbt_node_t node)
28 {
29   return static_cast<char*>(xbt_graph_node_get_data(node));
30 }
31
32 static container_t lowestCommonAncestor(container_t a1, container_t a2)
33 {
34   // this is only an optimization (since most of a1 and a2 share the same parent)
35   if (a1->father_ == a2->father_)
36     return a1->father_;
37
38   // create an array with all ancestors of a1
39   std::vector<container_t> ancestors_a1;
40   container_t p = a1->father_;
41   while (p) {
42     ancestors_a1.push_back(p);
43     p = p->father_;
44   }
45
46   // create an array with all ancestors of a2
47   std::vector<container_t> ancestors_a2;
48   p = a2->father_;
49   while (p) {
50     ancestors_a2.push_back(p);
51     p = p->father_;
52   }
53
54   // find the lowest ancestor
55   p     = nullptr;
56   int i = ancestors_a1.size() - 1;
57   int j = ancestors_a2.size() - 1;
58   while (i >= 0 && j >= 0) {
59     container_t a1p = ancestors_a1.at(i);
60     container_t a2p = ancestors_a2.at(j);
61     if (a1p == a2p) {
62       p = a1p;
63     } else {
64       break;
65     }
66     i--;
67     j--;
68   }
69   return p;
70 }
71
72 static void linkContainers(container_t src, container_t dst, std::set<std::string>* filter)
73 {
74   // ignore loopback
75   if (src->get_name() == "__loopback__" || dst->get_name() == "__loopback__") {
76     XBT_DEBUG("  linkContainers: ignoring loopback link");
77     return;
78   }
79
80   // find common father
81   container_t father = lowestCommonAncestor(src, dst);
82   if (not father) {
83     xbt_die("common father unknown, this is a tracing problem");
84   }
85
86   // check if we already register this pair (we only need one direction)
87   std::string aux1 = src->get_name() + dst->get_name();
88   std::string aux2 = dst->get_name() + src->get_name();
89   if (filter->find(aux1) != filter->end()) {
90     XBT_DEBUG("  linkContainers: already registered %s <-> %s (1)", src->get_cname(), dst->get_cname());
91     return;
92   }
93   if (filter->find(aux2) != filter->end()) {
94     XBT_DEBUG("  linkContainers: already registered %s <-> %s (2)", dst->get_cname(), src->get_cname());
95     return;
96   }
97
98   // ok, not found, register it
99   filter->insert(aux1);
100   filter->insert(aux2);
101
102   // declare type
103   std::string link_typename = father->type_->get_name() + "-" + src->type_->get_name() +
104                               std::to_string(src->type_->get_id()) + "-" + dst->type_->get_name() +
105                               std::to_string(dst->type_->get_id());
106   simgrid::instr::LinkType* link = father->type_->by_name_or_create(link_typename, src->type_, dst->type_);
107   link->set_calling_container(father);
108
109   // register EDGE types for triva configuration
110   trivaEdgeTypes.insert(link->get_name());
111
112   // create the link
113   static long long counter = 0;
114
115   std::string key = std::to_string(counter);
116   counter++;
117
118   link->start_event(src, "topology", key);
119   link->end_event(dst, "topology", key);
120
121   XBT_DEBUG("  linkContainers %s <-> %s", src->get_cname(), dst->get_cname());
122 }
123
124 static void recursiveGraphExtraction(simgrid::s4u::NetZone* netzone, container_t container,
125                                      std::set<std::string>* filter)
126 {
127   if (not TRACE_platform_topology()) {
128     XBT_DEBUG("Graph extraction disabled by user.");
129     return;
130   }
131   XBT_DEBUG("Graph extraction for NetZone = %s", netzone->get_cname());
132   if (not netzone->get_children().empty()) {
133     // bottom-up recursion
134     for (auto const& nz_son : netzone->get_children()) {
135       container_t child_container = container->children_.at(nz_son->get_name());
136       recursiveGraphExtraction(nz_son, child_container, filter);
137     }
138   }
139
140   xbt_graph_t graph                        = xbt_graph_new_graph(0, nullptr);
141   std::map<std::string, xbt_node_t>* nodes = new std::map<std::string, xbt_node_t>;
142   std::map<std::string, xbt_edge_t>* edges = new std::map<std::string, xbt_edge_t>;
143
144   netzone->get_impl()->get_graph(graph, nodes, edges);
145   for (auto elm : *edges) {
146     xbt_edge_t edge = elm.second;
147     linkContainers(simgrid::instr::Container::by_name(static_cast<const char*>(edge->src->data)),
148                    simgrid::instr::Container::by_name(static_cast<const char*>(edge->dst->data)), filter);
149   }
150   delete nodes;
151   delete edges;
152   xbt_graph_free_graph(graph, xbt_free_f, xbt_free_f, nullptr);
153 }
154
155 /*
156  * Callbacks
157  */
158 static void instr_netzone_on_creation(simgrid::s4u::NetZone& netzone)
159 {
160   std::string id = netzone.get_name();
161   if (simgrid::instr::Container::get_root() == nullptr) {
162     simgrid::instr::NetZoneContainer* root = new simgrid::instr::NetZoneContainer(id, 0, nullptr);
163     xbt_assert(simgrid::instr::Container::get_root() == root);
164
165     if (TRACE_smpi_is_enabled()) {
166       simgrid::instr::ContainerType* mpi = root->type_->by_name_or_create<simgrid::instr::ContainerType>("MPI");
167       if (not TRACE_smpi_is_grouped())
168         mpi->by_name_or_create<simgrid::instr::StateType>("MPI_STATE");
169       root->type_->by_name_or_create("MPI_LINK", mpi, mpi);
170       // TODO See if we can move this to the LoadBalancer plugin
171       root->type_->by_name_or_create("MIGRATE_LINK", mpi, mpi);
172       mpi->by_name_or_create<simgrid::instr::StateType>("MIGRATE_STATE");
173     }
174
175     if (TRACE_needs_platform()) {
176       currentContainer.push_back(root);
177     }
178     return;
179   }
180
181   if (TRACE_needs_platform()) {
182     simgrid::instr::NetZoneContainer* container =
183         new simgrid::instr::NetZoneContainer(id, currentContainer.size(), currentContainer.back());
184     currentContainer.push_back(container);
185   }
186 }
187
188 static void instr_link_on_creation(simgrid::s4u::Link& link)
189 {
190   if (currentContainer.empty()) // No ongoing parsing. Are you creating the loopback?
191     return;
192
193   container_t container = new simgrid::instr::Container(link.get_name(), "LINK", currentContainer.back());
194
195   if ((TRACE_categorized() || TRACE_uncategorized() || TRACE_platform()) && (not TRACE_disable_link())) {
196     simgrid::instr::VariableType* bandwidth = container->type_->by_name_or_create("bandwidth", "");
197     bandwidth->set_calling_container(container);
198     bandwidth->set_event(0, link.get_bandwidth());
199     simgrid::instr::VariableType* latency = container->type_->by_name_or_create("latency", "");
200     latency->set_calling_container(container);
201     latency->set_event(0, link.get_latency());
202   }
203   if (TRACE_uncategorized()) {
204     container->type_->by_name_or_create("bandwidth_used", "0.5 0.5 0.5");
205   }
206 }
207
208 static void instr_host_on_creation(simgrid::s4u::Host& host)
209 {
210   container_t container = new simgrid::instr::HostContainer(host, currentContainer.back());
211   container_t root      = simgrid::instr::Container::get_root();
212
213   if ((TRACE_categorized() || TRACE_uncategorized() || TRACE_platform()) && (not TRACE_disable_speed())) {
214     simgrid::instr::VariableType* speed = container->type_->by_name_or_create("speed", "");
215     speed->set_calling_container(container);
216     speed->set_event(0, host.get_speed());
217
218     simgrid::instr::VariableType* cores = container->type_->by_name_or_create("core_count", "");
219     cores->set_calling_container(container);
220     cores->set_event(0, host.get_core_count());
221   }
222
223   if (TRACE_uncategorized())
224     container->type_->by_name_or_create("speed_used", "0.5 0.5 0.5");
225
226   if (TRACE_smpi_is_enabled() && TRACE_smpi_is_grouped()) {
227     simgrid::instr::ContainerType* mpi = container->type_->by_name_or_create<simgrid::instr::ContainerType>("MPI");
228     mpi->by_name_or_create<simgrid::instr::StateType>("MPI_STATE");
229     // TODO See if we can move this to the LoadBalancer plugin
230     root->type_->by_name_or_create("MIGRATE_LINK", mpi, mpi);
231     mpi->by_name_or_create<simgrid::instr::StateType>("MIGRATE_STATE");
232   }
233 }
234
235 static void instr_host_on_speed_change(simgrid::s4u::Host& host)
236 {
237   simgrid::instr::Container::by_name(host.get_name())
238       ->get_variable("speed")
239       ->set_event(surf_get_clock(), host.get_core_count() * host.get_available_speed());
240 }
241
242 static void instr_action_on_state_change(simgrid::kernel::resource::Action* action,
243                                          simgrid::kernel::resource::Action::State /* previous */)
244 {
245   int n = action->get_variable()->get_number_of_constraint();
246
247   for (int i = 0; i < n; i++) {
248     double value = action->get_variable()->get_value() * action->get_variable()->get_constraint_weight(i);
249     /* Beware of composite actions: ptasks put links and cpus together. Extra pb: we cannot dynamic_cast from void* */
250     simgrid::kernel::resource::Resource* resource =
251         static_cast<simgrid::kernel::resource::Resource*>(action->get_variable()->get_constraint(i)->get_id());
252     simgrid::surf::Cpu* cpu = dynamic_cast<simgrid::surf::Cpu*>(resource);
253
254     if (cpu != nullptr)
255       TRACE_surf_resource_set_utilization("HOST", "speed_used", cpu->get_cname(), action->get_category(), value,
256                                           action->get_last_update(), SIMIX_get_clock() - action->get_last_update());
257
258     simgrid::kernel::resource::LinkImpl* link = dynamic_cast<simgrid::kernel::resource::LinkImpl*>(resource);
259
260     if (link != nullptr)
261       TRACE_surf_resource_set_utilization("LINK", "bandwidth_used", link->get_cname(), action->get_category(), value,
262                                           action->get_last_update(), SIMIX_get_clock() - action->get_last_update());
263   }
264 }
265
266 static void instr_link_on_bandwidth_change(simgrid::s4u::Link& link)
267 {
268   simgrid::instr::Container::by_name(link.get_name())
269       ->get_variable("bandwidth")
270       ->set_event(surf_get_clock(), sg_bandwidth_factor * link.get_bandwidth());
271 }
272
273 static void instr_netpoint_on_creation(simgrid::kernel::routing::NetPoint* netpoint)
274 {
275   if (netpoint->is_router())
276     new simgrid::instr::RouterContainer(netpoint->get_name(), currentContainer.back());
277 }
278
279 static void instr_on_platform_created()
280 {
281   currentContainer.clear();
282   std::set<std::string>* filter = new std::set<std::string>;
283   XBT_DEBUG("Starting graph extraction.");
284   recursiveGraphExtraction(simgrid::s4u::Engine::get_instance()->get_netzone_root(),
285                            simgrid::instr::Container::get_root(), filter);
286   XBT_DEBUG("Graph extraction finished.");
287   delete filter;
288   TRACE_paje_dump_buffer(true);
289 }
290
291 static void instr_actor_on_creation(simgrid::s4u::ActorPtr actor)
292 {
293   container_t root      = simgrid::instr::Container::get_root();
294   container_t container = simgrid::instr::Container::by_name(actor->get_host()->get_name());
295
296   container->create_child(instr_pid(actor.get()), "ACTOR");
297   simgrid::instr::ContainerType* actor_type =
298       container->type_->by_name_or_create<simgrid::instr::ContainerType>("ACTOR");
299   simgrid::instr::StateType* state = actor_type->by_name_or_create<simgrid::instr::StateType>("ACTOR_STATE");
300   state->add_entity_value("suspend", "1 0 1");
301   state->add_entity_value("sleep", "1 1 0");
302   state->add_entity_value("receive", "1 0 0");
303   state->add_entity_value("send", "0 0 1");
304   state->add_entity_value("execute", "0 1 1");
305   root->type_->by_name_or_create("ACTOR_LINK", actor_type, actor_type);
306   root->type_->by_name_or_create("ACTOR_TASK_LINK", actor_type, actor_type);
307
308   std::string container_name = instr_pid(actor.get());
309   actor->on_exit([container_name](bool failed) {
310     if (failed)
311       // kill means that this actor no longer exists, let's destroy it
312       simgrid::instr::Container::by_name(container_name)->remove_from_parent();
313   });
314 }
315
316 static long long int counter = 0;
317
318 static void instr_actor_on_migration_start(simgrid::s4u::ActorPtr actor)
319 {
320   // start link
321   container_t container = simgrid::instr::Container::by_name(instr_pid(actor.get()));
322   simgrid::instr::Container::get_root()->get_link("ACTOR_LINK")->start_event(container, "M", std::to_string(counter));
323
324   // destroy existing container of this process
325   container->remove_from_parent();
326 }
327
328 static void instr_actor_on_migration_end(simgrid::s4u::ActorPtr actor)
329 {
330   // create new container on the new_host location
331   simgrid::instr::Container::by_name(actor->get_host()->get_name())->create_child(instr_pid(actor.get()), "ACTOR");
332   // end link
333   simgrid::instr::Container::get_root()
334       ->get_link("ACTOR_LINK")
335       ->end_event(simgrid::instr::Container::by_name(instr_pid(actor.get())), "M", std::to_string(counter));
336   counter++;
337 }
338
339 static void instr_vm_on_creation(simgrid::s4u::Host& host)
340 {
341   container_t container             = new simgrid::instr::HostContainer(host, currentContainer.back());
342   container_t root                  = simgrid::instr::Container::get_root();
343   simgrid::instr::ContainerType* vm = container->type_->by_name_or_create<simgrid::instr::ContainerType>("VM");
344   simgrid::instr::StateType* state  = vm->by_name_or_create<simgrid::instr::StateType>("VM_STATE");
345   state->add_entity_value("suspend", "1 0 1");
346   state->add_entity_value("sleep", "1 1 0");
347   state->add_entity_value("receive", "1 0 0");
348   state->add_entity_value("send", "0 0 1");
349   state->add_entity_value("execute", "0 1 1");
350   root->type_->by_name_or_create("VM_LINK", vm, vm);
351   root->type_->by_name_or_create("VM_ACTOR_LINK", vm, vm);
352 }
353
354 void instr_define_callbacks()
355 {
356   // always need the callbacks to zones (we need only the root zone), to create the rootContainer and the rootType
357   // properly
358   if (TRACE_needs_platform()) {
359     simgrid::s4u::on_platform_created.connect(instr_on_platform_created);
360     simgrid::s4u::Host::on_creation.connect(instr_host_on_creation);
361     simgrid::s4u::Host::on_speed_change.connect(instr_host_on_speed_change);
362     simgrid::s4u::Link::on_creation.connect(instr_link_on_creation);
363     simgrid::s4u::Link::on_bandwidth_change.connect(instr_link_on_bandwidth_change);
364     simgrid::s4u::NetZone::on_seal.connect([](simgrid::s4u::NetZone& /*netzone*/) { currentContainer.pop_back(); });
365     simgrid::kernel::routing::NetPoint::on_creation.connect(instr_netpoint_on_creation);
366   }
367   simgrid::s4u::NetZone::on_creation.connect(instr_netzone_on_creation);
368
369   simgrid::surf::CpuAction::on_state_change.connect(instr_action_on_state_change);
370   simgrid::s4u::Link::on_communication_state_change.connect(instr_action_on_state_change);
371
372   if (TRACE_actor_is_enabled()) {
373     simgrid::s4u::Actor::on_creation.connect(instr_actor_on_creation);
374     simgrid::s4u::Actor::on_destruction.connect([](simgrid::s4u::ActorPtr actor) {
375       auto container = simgrid::instr::Container::by_name_or_null(instr_pid(actor.get()));
376       if (container != nullptr)
377         container->remove_from_parent();
378     });
379     simgrid::s4u::Actor::on_suspend.connect([](simgrid::s4u::ActorPtr actor) {
380       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->push_event("suspend");
381     });
382     simgrid::s4u::Actor::on_resume.connect([](simgrid::s4u::ActorPtr actor) {
383       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->pop_event();
384     });
385     simgrid::s4u::Actor::on_sleep.connect([](simgrid::s4u::ActorPtr actor) {
386       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->push_event("sleep");
387     });
388     simgrid::s4u::Actor::on_wake_up.connect([](simgrid::s4u::ActorPtr actor) {
389       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->pop_event();
390     });
391     simgrid::s4u::Exec::on_start.connect([](simgrid::s4u::ActorPtr actor) {
392       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->push_event("execute");
393     });
394     simgrid::s4u::Exec::on_completion.connect([](simgrid::s4u::ActorPtr actor) {
395       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->pop_event();
396     });
397     simgrid::s4u::Comm::on_sender_start.connect([](simgrid::s4u::ActorPtr actor) {
398       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->push_event("send");
399     });
400     simgrid::s4u::Comm::on_receiver_start.connect([](simgrid::s4u::ActorPtr actor) {
401       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->push_event("receive");
402     });
403     simgrid::s4u::Comm::on_completion.connect([](simgrid::s4u::ActorPtr actor) {
404       simgrid::instr::Container::by_name(instr_pid(actor.get()))->get_state("ACTOR_STATE")->pop_event();
405     });
406     simgrid::s4u::Actor::on_migration_start.connect(instr_actor_on_migration_start);
407     simgrid::s4u::Actor::on_migration_end.connect(instr_actor_on_migration_end);
408   }
409
410   if (TRACE_vm_is_enabled()) {
411     simgrid::s4u::Host::on_creation.connect(instr_vm_on_creation);
412     simgrid::s4u::VirtualMachine::on_start.connect([](simgrid::s4u::VirtualMachine& vm) {
413       simgrid::instr::Container::by_name(vm.get_name())->get_state("VM_STATE")->push_event("start");
414     });
415     simgrid::s4u::VirtualMachine::on_started.connect([](simgrid::s4u::VirtualMachine& vm) {
416       simgrid::instr::Container::by_name(vm.get_name())->get_state("VM_STATE")->pop_event();
417     });
418     simgrid::s4u::VirtualMachine::on_suspend.connect([](simgrid::s4u::VirtualMachine& vm) {
419       simgrid::instr::Container::by_name(vm.get_name())->get_state("VM_STATE")->push_event("suspend");
420     });
421     simgrid::s4u::VirtualMachine::on_resume.connect([](simgrid::s4u::VirtualMachine& vm) {
422       simgrid::instr::Container::by_name(vm.get_name())->get_state("VM_STATE")->pop_event();
423     });
424     simgrid::s4u::Host::on_destruction.connect(
425         [](simgrid::s4u::Host& host) { simgrid::instr::Container::by_name(host.get_name())->remove_from_parent(); });
426   }
427 }
428 /*
429  * user categories support
430  */
431 static void recursiveNewVariableType(const std::string& new_typename, const std::string& color,
432                                      simgrid::instr::Type* root)
433 {
434   if (root->get_name() == "HOST" || root->get_name() == "VM")
435     root->by_name_or_create(std::string("p") + new_typename, color);
436
437   if (root->get_name() == "LINK")
438     root->by_name_or_create(std::string("b") + new_typename, color);
439
440   for (auto elm : root->children_) {
441     recursiveNewVariableType(new_typename, color, elm.second);
442   }
443 }
444
445 void instr_new_variable_type(const std::string& new_typename, const std::string& color)
446 {
447   recursiveNewVariableType(new_typename, color, simgrid::instr::Container::get_root()->type_);
448 }
449
450 static void recursiveNewUserVariableType(const std::string& father_type, const std::string& new_typename,
451                                          const std::string& color, simgrid::instr::Type* root)
452 {
453   if (root->get_name() == father_type) {
454     root->by_name_or_create(new_typename, color);
455   }
456   for (auto elm : root->children_)
457     recursiveNewUserVariableType(father_type, new_typename, color, elm.second);
458 }
459
460 void instr_new_user_variable_type(const std::string& father_type, const std::string& new_typename,
461                                   const std::string& color)
462 {
463   recursiveNewUserVariableType(father_type, new_typename, color, simgrid::instr::Container::get_root()->type_);
464 }
465
466 static void recursiveNewUserStateType(const std::string& father_type, const std::string& new_typename,
467                                       simgrid::instr::Type* root)
468 {
469   if (root->get_name() == father_type)
470     root->by_name_or_create<simgrid::instr::StateType>(new_typename);
471
472   for (auto elm : root->children_)
473     recursiveNewUserStateType(father_type, new_typename, elm.second);
474 }
475
476 void instr_new_user_state_type(const std::string& father_type, const std::string& new_typename)
477 {
478   recursiveNewUserStateType(father_type, new_typename, simgrid::instr::Container::get_root()->type_);
479 }
480
481 static void recursiveNewValueForUserStateType(const std::string& type_name, const char* val, const std::string& color,
482                                               simgrid::instr::Type* root)
483 {
484   if (root->get_name() == type_name)
485     static_cast<simgrid::instr::StateType*>(root)->add_entity_value(val, color);
486
487   for (auto elm : root->children_)
488     recursiveNewValueForUserStateType(type_name, val, color, elm.second);
489 }
490
491 void instr_new_value_for_user_state_type(const std::string& type_name, const char* value, const std::string& color)
492 {
493   recursiveNewValueForUserStateType(type_name, value, color, simgrid::instr::Container::get_root()->type_);
494 }
495
496 #define GRAPHICATOR_SUPPORT_FUNCTIONS
497
498 static void recursiveXBTGraphExtraction(xbt_graph_t graph, std::map<std::string, xbt_node_t>* nodes,
499                                         std::map<std::string, xbt_edge_t>* edges, sg_netzone_t netzone,
500                                         container_t container)
501 {
502   if (not netzone->get_children().empty()) {
503     // bottom-up recursion
504     for (auto const& netzone_child : netzone->get_children()) {
505       container_t child_container = container->children_.at(netzone_child->get_name());
506       recursiveXBTGraphExtraction(graph, nodes, edges, netzone_child, child_container);
507     }
508   }
509
510   netzone->get_impl()->get_graph(graph, nodes, edges);
511 }
512
513 xbt_graph_t instr_routing_platform_graph()
514 {
515   xbt_graph_t ret                          = xbt_graph_new_graph(0, nullptr);
516   std::map<std::string, xbt_node_t>* nodes = new std::map<std::string, xbt_node_t>;
517   std::map<std::string, xbt_edge_t>* edges = new std::map<std::string, xbt_edge_t>;
518   recursiveXBTGraphExtraction(ret, nodes, edges, simgrid::s4u::Engine::get_instance()->get_netzone_root(),
519                               simgrid::instr::Container::get_root());
520   delete nodes;
521   delete edges;
522   return ret;
523 }
524
525 void instr_routing_platform_graph_export_graphviz(xbt_graph_t g, const char* filename)
526 {
527   unsigned int cursor = 0;
528   xbt_node_t node     = nullptr;
529   xbt_edge_t edge     = nullptr;
530
531   FILE* file = fopen(filename, "w");
532   xbt_assert(file, "Failed to open %s \n", filename);
533
534   if (g->directed)
535     fprintf(file, "digraph test {\n");
536   else
537     fprintf(file, "graph test {\n");
538
539   fprintf(file, "  graph [overlap=scale]\n");
540
541   fprintf(file, "  node [shape=box, style=filled]\n");
542   fprintf(file, "  node [width=.3, height=.3, style=filled, color=skyblue]\n\n");
543
544   xbt_dynar_foreach (g->nodes, cursor, node) {
545     fprintf(file, "  \"%s\";\n", instr_node_name(node));
546   }
547   xbt_dynar_foreach (g->edges, cursor, edge) {
548     const char* src_s = instr_node_name(edge->src);
549     const char* dst_s = instr_node_name(edge->dst);
550     if (g->directed)
551       fprintf(file, "  \"%s\" -> \"%s\";\n", src_s, dst_s);
552     else
553       fprintf(file, "  \"%s\" -- \"%s\";\n", src_s, dst_s);
554   }
555   fprintf(file, "}\n");
556   fclose(file);
557 }