src/instr/instr_platform.cpp

   1 /* Copyright (c) 2010-2020. 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 #include <fstream>
  24
  25 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(instr_routing, instr, "Tracing platform hierarchy");
  26
  27 std::string instr_pid(simgrid::s4u::Actor const& proc)
  28 {
  29   return std::string(proc.get_name()) + "-" + std::to_string(proc.get_pid());
  30 }
  31
  32 static const char* instr_node_name(const s_xbt_node_t* node)
  33 {
  34   return static_cast<char*>(xbt_graph_node_get_data(node));
  35 }
  36
  37 static container_t lowestCommonAncestor(const simgrid::instr::Container* a1, const simgrid::instr::Container* a2)
  38 {
  39   // this is only an optimization (since most of a1 and a2 share the same parent)
  40   if (a1->father_ == a2->father_)
  41     return a1->father_;
  42
  43   // create an array with all ancestors of a1
  44   std::vector<container_t> ancestors_a1;
  45   container_t p = a1->father_;
  46   while (p) {
  47     ancestors_a1.push_back(p);
  48     p = p->father_;
  49   }
  50
  51   // create an array with all ancestors of a2
  52   std::vector<container_t> ancestors_a2;
  53   p = a2->father_;
  54   while (p) {
  55     ancestors_a2.push_back(p);
  56     p = p->father_;
  57   }
  58
  59   // find the lowest ancestor
  60   p     = nullptr;
  61   int i = ancestors_a1.size() - 1;
  62   int j = ancestors_a2.size() - 1;
  63   while (i >= 0 && j >= 0) {
  64     container_t a1p = ancestors_a1.at(i);
  65     const simgrid::instr::Container* a2p = ancestors_a2.at(j);
  66     if (a1p == a2p) {
  67       p = a1p;
  68     } else {
  69       break;
  70     }
  71     i--;
  72     j--;
  73   }
  74   return p;
  75 }
  76
  77 static void linkContainers(container_t src, container_t dst, std::set<std::string>* filter)
  78 {
  79   // ignore loopback
  80   if (src->get_name() == "__loopback__" || dst->get_name() == "__loopback__") {
  81     XBT_DEBUG("  linkContainers: ignoring loopback link");
  82     return;
  83   }
  84
  85   // find common father
  86   container_t father = lowestCommonAncestor(src, dst);
  87   if (not father) {
  88     xbt_die("common father unknown, this is a tracing problem");
  89   }
  90
  91   // check if we already register this pair (we only need one direction)
  92   std::string aux1 = src->get_name() + dst->get_name();
  93   std::string aux2 = dst->get_name() + src->get_name();
  94   if (filter->find(aux1) != filter->end()) {
  95     XBT_DEBUG("  linkContainers: already registered %s <-> %s (1)", src->get_cname(), dst->get_cname());
  96     return;
  97   }
  98   if (filter->find(aux2) != filter->end()) {
  99     XBT_DEBUG("  linkContainers: already registered %s <-> %s (2)", dst->get_cname(), src->get_cname());
 100     return;
 101   }
 102
 103   // ok, not found, register it
 104   filter->insert(aux1);
 105   filter->insert(aux2);
 106
 107   // declare type
 108   std::string link_typename = father->type_->get_name() + "-" + src->type_->get_name() +
 109                               std::to_string(src->type_->get_id()) + "-" + dst->type_->get_name() +
 110                               std::to_string(dst->type_->get_id());
 111   simgrid::instr::LinkType* link = father->type_->by_name_or_create(link_typename, src->type_, dst->type_);
 112   link->set_calling_container(father);
 113
 114   // create the link
 115   static long long counter = 0;
 116
 117   std::string key = std::to_string(counter);
 118   counter++;
 119
 120   link->start_event(src, "topology", key);
 121   link->end_event(dst, "topology", key);
 122
 123   XBT_DEBUG("  linkContainers %s <-> %s", src->get_cname(), dst->get_cname());
 124 }
 125
 126 static void recursiveGraphExtraction(const simgrid::s4u::NetZone* netzone, container_t container,
 127                                      std::set<std::string>* filter)
 128 {
 129   if (not TRACE_platform_topology()) {
 130     XBT_DEBUG("Graph extraction disabled by user.");
 131     return;
 132   }
 133   XBT_DEBUG("Graph extraction for NetZone = %s", netzone->get_cname());
 134   if (not netzone->get_children().empty()) {
 135     // bottom-up recursion
 136     for (auto const& nz_son : netzone->get_children()) {
 137       container_t child_container = container->children_.at(nz_son->get_name());
 138       recursiveGraphExtraction(nz_son, child_container, filter);
 139     }
 140   }
 141
 142   xbt_graph_t graph                        = xbt_graph_new_graph(0, nullptr);
 143   std::map<std::string, xbt_node_t>* nodes = new std::map<std::string, xbt_node_t>();
 144   std::map<std::string, xbt_edge_t>* edges = new std::map<std::string, xbt_edge_t>();
 145
 146   netzone->get_impl()->get_graph(graph, nodes, edges);
 147   for (auto elm : *edges) {
 148     const xbt_edge* edge = elm.second;
 149     linkContainers(simgrid::instr::Container::by_name(static_cast<const char*>(edge->src->data)),
 150                    simgrid::instr::Container::by_name(static_cast<const char*>(edge->dst->data)), filter);
 151   }
 152   delete nodes;
 153   delete edges;
 154   xbt_graph_free_graph(graph, xbt_free_f, xbt_free_f, nullptr);
 155 }
 156
 157 /*
 158  * user categories support
 159  */
 160 static void recursiveNewVariableType(const std::string& new_typename, const std::string& color,
 161                                      simgrid::instr::Type* root)
 162 {
 163   if (root->get_name() == "HOST" || root->get_name() == "VM")
 164     root->by_name_or_create(std::string("p") + new_typename, color);
 165
 166   if (root->get_name() == "LINK")
 167     root->by_name_or_create(std::string("b") + new_typename, color);
 168
 169   for (auto const& elm : root->children_) {
 170     recursiveNewVariableType(new_typename, color, elm.second.get());
 171   }
 172 }
 173
 174 void instr_new_variable_type(const std::string& new_typename, const std::string& color)
 175 {
 176   recursiveNewVariableType(new_typename, color, simgrid::instr::Container::get_root()->type_);
 177 }
 178
 179 static void recursiveNewUserVariableType(const std::string& father_type, const std::string& new_typename,
 180                                          const std::string& color, simgrid::instr::Type* root)
 181 {
 182   if (root->get_name() == father_type) {
 183     root->by_name_or_create(new_typename, color);
 184   }
 185   for (auto const& elm : root->children_)
 186     recursiveNewUserVariableType(father_type, new_typename, color, elm.second.get());
 187 }
 188
 189 void instr_new_user_variable_type(const std::string& father_type, const std::string& new_typename,
 190                                   const std::string& color)
 191 {
 192   recursiveNewUserVariableType(father_type, new_typename, color, simgrid::instr::Container::get_root()->type_);
 193 }
 194
 195 static void recursiveNewUserStateType(const std::string& father_type, const std::string& new_typename,
 196                                       simgrid::instr::Type* root)
 197 {
 198   if (root->get_name() == father_type)
 199     root->by_name_or_create<simgrid::instr::StateType>(new_typename);
 200
 201   for (auto const& elm : root->children_)
 202     recursiveNewUserStateType(father_type, new_typename, elm.second.get());
 203 }
 204
 205 void instr_new_user_state_type(const std::string& father_type, const std::string& new_typename)
 206 {
 207   recursiveNewUserStateType(father_type, new_typename, simgrid::instr::Container::get_root()->type_);
 208 }
 209
 210 static void recursiveNewValueForUserStateType(const std::string& type_name, const char* val, const std::string& color,
 211                                               simgrid::instr::Type* root)
 212 {
 213   if (root->get_name() == type_name)
 214     static_cast<simgrid::instr::StateType*>(root)->add_entity_value(val, color);
 215
 216   for (auto const& elm : root->children_)
 217     recursiveNewValueForUserStateType(type_name, val, color, elm.second.get());
 218 }
 219
 220 void instr_new_value_for_user_state_type(const std::string& type_name, const char* value, const std::string& color)
 221 {
 222   recursiveNewValueForUserStateType(type_name, value, color, simgrid::instr::Container::get_root()->type_);
 223 }
 224
 225 static void recursiveXBTGraphExtraction(const s_xbt_graph_t* graph, std::map<std::string, xbt_node_t>* nodes,
 226                                         std::map<std::string, xbt_edge_t>* edges, const_sg_netzone_t netzone)
 227 {
 228   // bottom-up recursion
 229   for (auto const& netzone_child : netzone->get_children())
 230     recursiveXBTGraphExtraction(graph, nodes, edges, netzone_child);
 231
 232   netzone->get_impl()->get_graph(graph, nodes, edges);
 233 }
 234
 235 namespace simgrid {
 236 namespace instr {
 237
 238 void platform_graph_export_graphviz(const std::string& output_filename)
 239 {
 240   xbt_graph_t g                            = xbt_graph_new_graph(0, nullptr);
 241   std::map<std::string, xbt_node_t>* nodes = new std::map<std::string, xbt_node_t>();
 242   std::map<std::string, xbt_edge_t>* edges = new std::map<std::string, xbt_edge_t>();
 243   recursiveXBTGraphExtraction(g, nodes, edges, s4u::Engine::get_instance()->get_netzone_root());
 244
 245   std::ofstream fs;
 246   fs.open(output_filename, std::ofstream::out);
 247   xbt_assert(not fs.fail(), "Failed to open %s", output_filename.c_str());
 248
 249   if (g->directed)
 250     fs << "digraph test {" << std::endl;
 251   else
 252     fs << "graph test {" << std::endl;
 253
 254   fs << "  graph [overlap=scale]" << std::endl;
 255
 256   fs << "  node [shape=box, style=filled]" << std::endl;
 257   fs << "  node [width=.3, height=.3, style=filled, color=skyblue]" << std::endl << std::endl;
 258
 259   for (auto const& elm : *nodes)
 260     fs << "  \"" << instr_node_name(elm.second) << "\";" << std::endl;
 261
 262   for (auto const& elm : *edges) {
 263     const char* src_s = instr_node_name(elm.second->src);
 264     const char* dst_s = instr_node_name(elm.second->dst);
 265     if (g->directed)
 266       fs << "  \"" << src_s << "\" -> \"" << dst_s << "\";" << std::endl;
 267     else
 268       fs << "  \"" << src_s << "\" -- \"" << dst_s << "\";" << std::endl;
 269   }
 270   fs << "}" << std::endl;
 271   fs.close();
 272
 273   xbt_graph_free_graph(g, xbt_free_f, xbt_free_f, nullptr);
 274   delete nodes;
 275   delete edges;
 276 }
 277
 278 /* Callbacks */
 279 static std::vector<NetZoneContainer*> currentContainer; /* push and pop, used only in creation */
 280 static void on_netzone_creation(s4u::NetZone const& netzone)
 281 {
 282   std::string id = netzone.get_name();
 283   if (Container::get_root() == nullptr) {
 284     NetZoneContainer* root = new NetZoneContainer(id, 0, nullptr);
 285     xbt_assert(Container::get_root() == root);
 286
 287     if (TRACE_smpi_is_enabled()) {
 288       ContainerType* mpi = root->type_->by_name_or_create<ContainerType>("MPI");
 289       if (not TRACE_smpi_is_grouped())
 290         mpi->by_name_or_create<StateType>("MPI_STATE");
 291       root->type_->by_name_or_create("MPI_LINK", mpi, mpi);
 292       // TODO See if we can move this to the LoadBalancer plugin
 293       root->type_->by_name_or_create("MIGRATE_LINK", mpi, mpi);
 294       mpi->by_name_or_create<StateType>("MIGRATE_STATE");
 295     }
 296
 297     if (TRACE_needs_platform()) {
 298       currentContainer.push_back(root);
 299     }
 300     return;
 301   }
 302
 303   if (TRACE_needs_platform()) {
 304     NetZoneContainer* container = new NetZoneContainer(id, currentContainer.size(), currentContainer.back());
 305     currentContainer.push_back(container);
 306   }
 307 }
 308
 309 static void on_link_creation(s4u::Link const& link)
 310 {
 311   if (currentContainer.empty()) // No ongoing parsing. Are you creating the loopback?
 312     return;
 313
 314   Container* container = new Container(link.get_name(), "LINK", currentContainer.back());
 315
 316   if ((TRACE_categorized() || TRACE_uncategorized() || TRACE_platform()) && (not TRACE_disable_link())) {
 317     VariableType* bandwidth = container->type_->by_name_or_create("bandwidth", "");
 318     bandwidth->set_calling_container(container);
 319     bandwidth->set_event(0, link.get_bandwidth());
 320     VariableType* latency = container->type_->by_name_or_create("latency", "");
 321     latency->set_calling_container(container);
 322     latency->set_event(0, link.get_latency());
 323   }
 324   if (TRACE_uncategorized()) {
 325     container->type_->by_name_or_create("bandwidth_used", "0.5 0.5 0.5");
 326   }
 327 }
 328
 329 static void on_host_creation(s4u::Host const& host)
 330 {
 331   Container* container  = new HostContainer(host, currentContainer.back());
 332   const Container* root = Container::get_root();
 333
 334   if ((TRACE_categorized() || TRACE_uncategorized() || TRACE_platform()) && (not TRACE_disable_speed())) {
 335     VariableType* speed = container->type_->by_name_or_create("speed", "");
 336     speed->set_calling_container(container);
 337     speed->set_event(0, host.get_speed());
 338
 339     VariableType* cores = container->type_->by_name_or_create("core_count", "");
 340     cores->set_calling_container(container);
 341     cores->set_event(0, host.get_core_count());
 342   }
 343
 344   if (TRACE_uncategorized())
 345     container->type_->by_name_or_create("speed_used", "0.5 0.5 0.5");
 346
 347   if (TRACE_smpi_is_enabled() && TRACE_smpi_is_grouped()) {
 348     ContainerType* mpi = container->type_->by_name_or_create<ContainerType>("MPI");
 349     mpi->by_name_or_create<StateType>("MPI_STATE");
 350     // TODO See if we can move this to the LoadBalancer plugin
 351     root->type_->by_name_or_create("MIGRATE_LINK", mpi, mpi);
 352     mpi->by_name_or_create<StateType>("MIGRATE_STATE");
 353   }
 354 }
 355
 356 static void on_host_speed_change(s4u::Host const& host)
 357 {
 358   Container::by_name(host.get_name())
 359       ->get_variable("speed")
 360       ->set_event(surf_get_clock(), host.get_core_count() * host.get_available_speed());
 361 }
 362
 363 static void on_action_state_change(kernel::resource::Action const& action,
 364                                    kernel::resource::Action::State /* previous */)
 365 {
 366   int n = action.get_variable()->get_number_of_constraint();
 367
 368   for (int i = 0; i < n; i++) {
 369     double value = action.get_variable()->get_value() * action.get_variable()->get_constraint_weight(i);
 370     /* Beware of composite actions: ptasks put links and cpus together. Extra pb: we cannot dynamic_cast from void* */
 371     kernel::resource::Resource* resource = action.get_variable()->get_constraint(i)->get_id();
 372     const kernel::resource::Cpu* cpu     = dynamic_cast<kernel::resource::Cpu*>(resource);
 373
 374     if (cpu != nullptr)
 375       resource_set_utilization("HOST", "speed_used", cpu->get_cname(), action.get_category(), value,
 376                                action.get_last_update(), SIMIX_get_clock() - action.get_last_update());
 377
 378     const kernel::resource::LinkImpl* link = dynamic_cast<kernel::resource::LinkImpl*>(resource);
 379
 380     if (link != nullptr)
 381       resource_set_utilization("LINK", "bandwidth_used", link->get_cname(), action.get_category(), value,
 382                                action.get_last_update(), SIMIX_get_clock() - action.get_last_update());
 383   }
 384 }
 385
 386 static void on_link_bandwidth_change(s4u::Link const& link)
 387 {
 388   Container::by_name(link.get_name())
 389       ->get_variable("bandwidth")
 390       ->set_event(surf_get_clock(), sg_bandwidth_factor * link.get_bandwidth());
 391 }
 392
 393 static void on_netpoint_creation(kernel::routing::NetPoint const& netpoint)
 394 {
 395   if (netpoint.is_router())
 396     new RouterContainer(netpoint.get_name(), currentContainer.back());
 397 }
 398
 399 static void on_platform_created()
 400 {
 401   currentContainer.clear();
 402   std::set<std::string>* filter = new std::set<std::string>();
 403   XBT_DEBUG("Starting graph extraction.");
 404   recursiveGraphExtraction(s4u::Engine::get_instance()->get_netzone_root(), Container::get_root(), filter);
 405   XBT_DEBUG("Graph extraction finished.");
 406   delete filter;
 407   TRACE_paje_dump_buffer(true);
 408 }
 409
 410 static void on_actor_creation(s4u::Actor const& actor)
 411 {
 412   const Container* root = Container::get_root();
 413   Container* container  = Container::by_name(actor.get_host()->get_name());
 414
 415   container->create_child(instr_pid(actor), "ACTOR");
 416   ContainerType* actor_type = container->type_->by_name_or_create<ContainerType>("ACTOR");
 417   StateType* state          = actor_type->by_name_or_create<StateType>("ACTOR_STATE");
 418   state->add_entity_value("suspend", "1 0 1");
 419   state->add_entity_value("sleep", "1 1 0");
 420   state->add_entity_value("receive", "1 0 0");
 421   state->add_entity_value("send", "0 0 1");
 422   state->add_entity_value("execute", "0 1 1");
 423   root->type_->by_name_or_create("ACTOR_LINK", actor_type, actor_type);
 424   root->type_->by_name_or_create("ACTOR_TASK_LINK", actor_type, actor_type);
 425
 426   std::string container_name = instr_pid(actor);
 427   actor.on_exit([container_name](bool failed) {
 428     if (failed)
 429       // kill means that this actor no longer exists, let's destroy it
 430       Container::by_name(container_name)->remove_from_parent();
 431   });
 432 }
 433
 434 static void on_actor_host_change(s4u::Actor const& actor, s4u::Host const& /*previous_location*/)
 435 {
 436   static long long int counter = 0;
 437   container_t container        = Container::by_name(instr_pid(actor));
 438   LinkType* link               = Container::get_root()->get_link("ACTOR_LINK");
 439
 440   // start link
 441   link->start_event(container, "M", std::to_string(counter));
 442   // destroy existing container of this process
 443   container->remove_from_parent();
 444   // create new container on the new_host location
 445   Container::by_name(actor.get_host()->get_name())->create_child(instr_pid(actor), "ACTOR");
 446   // end link
 447   link->end_event(Container::by_name(instr_pid(actor)), "M", std::to_string(counter));
 448   counter++;
 449 }
 450
 451 static void on_vm_creation(s4u::Host const& host)
 452 {
 453   const Container* container = new HostContainer(host, currentContainer.back());
 454   const Container* root      = Container::get_root();
 455   ContainerType* vm          = container->type_->by_name_or_create<ContainerType>("VM");
 456   StateType* state           = vm->by_name_or_create<StateType>("VM_STATE");
 457   state->add_entity_value("suspend", "1 0 1");
 458   state->add_entity_value("sleep", "1 1 0");
 459   state->add_entity_value("receive", "1 0 0");
 460   state->add_entity_value("send", "0 0 1");
 461   state->add_entity_value("execute", "0 1 1");
 462   root->type_->by_name_or_create("VM_LINK", vm, vm);
 463   root->type_->by_name_or_create("VM_ACTOR_LINK", vm, vm);
 464 }
 465
 466 void define_callbacks()
 467 {
 468   // always need the callbacks to zones (we need only the root zone), to create the rootContainer and the rootType
 469   // properly
 470   if (TRACE_needs_platform()) {
 471     s4u::Engine::on_platform_created.connect(on_platform_created);
 472     s4u::Host::on_creation.connect(on_host_creation);
 473     s4u::Host::on_speed_change.connect(on_host_speed_change);
 474     s4u::Link::on_creation.connect(on_link_creation);
 475     s4u::Link::on_bandwidth_change.connect(on_link_bandwidth_change);
 476     s4u::NetZone::on_seal.connect([](s4u::NetZone const& /*netzone*/) { currentContainer.pop_back(); });
 477     kernel::routing::NetPoint::on_creation.connect(on_netpoint_creation);
 478   }
 479   s4u::NetZone::on_creation.connect(on_netzone_creation);
 480   s4u::Engine::on_time_advance.connect([](double /*time_delta*/) { TRACE_paje_dump_buffer(false); });
 481
 482   kernel::resource::CpuAction::on_state_change.connect(on_action_state_change);
 483   s4u::Link::on_communication_state_change.connect(on_action_state_change);
 484
 485   if (TRACE_actor_is_enabled()) {
 486     s4u::Actor::on_creation.connect(on_actor_creation);
 487     s4u::Actor::on_destruction.connect([](s4u::Actor const& actor) {
 488       auto container = Container::by_name_or_null(instr_pid(actor));
 489       if (container != nullptr)
 490         container->remove_from_parent();
 491     });
 492     s4u::Actor::on_suspend.connect([](s4u::Actor const& actor) {
 493       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->push_event("suspend");
 494     });
 495     s4u::Actor::on_resume.connect(
 496         [](s4u::Actor const& actor) { Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->pop_event(); });
 497     s4u::Actor::on_sleep.connect([](s4u::Actor const& actor) {
 498       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->push_event("sleep");
 499     });
 500     s4u::Actor::on_wake_up.connect(
 501         [](s4u::Actor const& actor) { Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->pop_event(); });
 502     s4u::Exec::on_start.connect([](simgrid::s4u::Actor const& actor, s4u::Exec const&) {
 503       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->push_event("execute");
 504     });
 505     s4u::Exec::on_completion.connect([](s4u::Actor const& actor, s4u::Exec const&) {
 506       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->pop_event();
 507     });
 508     s4u::Comm::on_sender_start.connect([](s4u::Actor const& actor) {
 509       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->push_event("send");
 510     });
 511     s4u::Comm::on_receiver_start.connect([](s4u::Actor const& actor) {
 512       Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->push_event("receive");
 513     });
 514     s4u::Comm::on_completion.connect(
 515         [](s4u::Actor const& actor) { Container::by_name(instr_pid(actor))->get_state("ACTOR_STATE")->pop_event(); });
 516     s4u::Actor::on_host_change.connect(on_actor_host_change);
 517   }
 518
 519   if (TRACE_vm_is_enabled()) {
 520     s4u::Host::on_creation.connect(on_vm_creation);
 521     s4u::VirtualMachine::on_start.connect([](s4u::VirtualMachine const& vm) {
 522       Container::by_name(vm.get_name())->get_state("VM_STATE")->push_event("start");
 523     });
 524     s4u::VirtualMachine::on_started.connect(
 525         [](s4u::VirtualMachine const& vm) { Container::by_name(vm.get_name())->get_state("VM_STATE")->pop_event(); });
 526     s4u::VirtualMachine::on_suspend.connect([](s4u::VirtualMachine const& vm) {
 527       Container::by_name(vm.get_name())->get_state("VM_STATE")->push_event("suspend");
 528     });
 529     s4u::VirtualMachine::on_resume.connect(
 530         [](s4u::VirtualMachine const& vm) { Container::by_name(vm.get_name())->get_state("VM_STATE")->pop_event(); });
 531     s4u::Host::on_destruction.connect(
 532         [](s4u::Host const& host) { Container::by_name(host.get_name())->remove_from_parent(); });
 533   }
 534 }
 535 } // namespace instr
 536 } // namespace simgrid