1 /* Copyright (c) 2016-2023. The SimGrid Team. All rights reserved. */
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. */
6 #include <simgrid/Exception.hpp>
7 #include <simgrid/kernel/Timer.hpp>
8 #include <simgrid/kernel/routing/NetPoint.hpp>
9 #include <simgrid/kernel/routing/NetZoneImpl.hpp>
10 #include <simgrid/s4u/Host.hpp>
12 #include "src/kernel/EngineImpl.hpp"
13 #include "src/kernel/resource/StandardLinkImpl.hpp"
14 #include "src/kernel/resource/profile/Profile.hpp"
15 #include "src/kernel/xml/platf.hpp"
16 #include "src/mc/mc.h"
17 #include "src/mc/mc_record.hpp"
18 #include "src/mc/mc_replay.hpp"
19 #include "src/simgrid/math_utils.h"
20 #include "src/simgrid/sg_config.hpp"
21 #include "src/smpi/include/smpi_actor.hpp"
23 #include "xbt/log.hpp"
25 #include <boost/algorithm/string/predicate.hpp>
29 #include "src/mc/remote/AppSide.hpp"
32 XBT_LOG_NEW_DEFAULT_CATEGORY(ker_engine, "Logging specific to Engine (kernel)");
34 namespace simgrid::kernel {
35 double EngineImpl::now_ = 0.0;
36 EngineImpl* EngineImpl::instance_ = nullptr; /* That singleton is awful too. */
38 config::Flag<double> cfg_breakpoint{"debug/breakpoint",
39 "When non-negative, raise a SIGTRAP after given (simulated) time", -1.0};
40 config::Flag<bool> cfg_verbose_exit{"debug/verbose-exit", "Display the actor status at exit", true};
42 constexpr std::initializer_list<std::pair<const char*, context::ContextFactory* (*)()>> context_factories = {
44 {"raw", &context::raw_factory},
46 #if HAVE_UCONTEXT_CONTEXTS
47 {"ucontext", &context::sysv_factory},
49 #if HAVE_BOOST_CONTEXTS
50 {"boost", &context::boost_factory},
52 {"thread", &context::thread_factory},
55 static_assert(context_factories.size() > 0, "No context factories are enabled for this build");
57 // Create the list of possible contexts:
58 static inline std::string contexts_list()
62 for (auto const& [factory_name, _] : context_factories) {
63 res += sep + factory_name;
69 static config::Flag<std::string> context_factory_name("contexts/factory",
70 ("Possible values: " + contexts_list()).c_str(),
71 context_factories.begin()->first);
73 } // namespace simgrid::kernel
75 XBT_ATTRIB_NORETURN static void inthandler(int)
77 if (simgrid::kernel::cfg_verbose_exit) {
78 XBT_INFO("CTRL-C pressed. The current status will be displayed before exit (disable that behavior with option "
79 "'debug/verbose-exit').");
80 simgrid::kernel::EngineImpl::get_instance()->display_all_actor_status();
82 XBT_INFO("CTRL-C pressed, exiting. Hiding the current process status since 'debug/verbose-exit' is set to false.");
87 static void segvhandler(int signum, siginfo_t* siginfo, void* /*context*/)
89 if ((siginfo->si_signo == SIGSEGV && siginfo->si_code == SEGV_ACCERR) || siginfo->si_signo == SIGBUS) {
91 "Access violation or Bus error detected.\n"
92 "This probably comes from a programming error in your code, or from a stack\n"
93 "overflow. If you are certain of your code, try increasing the stack size\n"
94 " --cfg=contexts/stack-size:XXX (current size is %u KiB).\n"
96 "If it does not help, this may have one of the following causes:\n"
97 "a bug in SimGrid, a bug in the OS or a bug in a third-party libraries.\n"
98 "Failing hardware can sometimes generate such errors too.\n"
100 "If you think you've found a bug in SimGrid, please report it along with a\n"
101 "Minimal Working Example (MWE) reproducing your problem and a full backtrace\n"
102 "of the fault captured with gdb or valgrind.\n",
103 simgrid::kernel::context::Context::stack_size / 1024);
104 } else if (siginfo->si_signo == SIGSEGV) {
105 fprintf(stderr, "Segmentation fault.\n");
107 if (SMPI_is_inited() && smpi_cfg_privatization() == SmpiPrivStrategies::NONE) {
108 #if HAVE_PRIVATIZATION
109 fprintf(stderr, "Try to enable SMPI variable privatization with --cfg=smpi/privatization:yes.\n");
111 fprintf(stderr, "Sadly, your system does not support --cfg=smpi/privatization:yes (yet).\n");
112 #endif /* HAVE_PRIVATIZATION */
114 #endif /* HAVE_SMPI */
119 static void install_signal_handlers()
121 /* Install signal handler for SIGINT */
122 std::signal(SIGINT, inthandler);
124 /* Install signal handler for SIGSEGV */
125 if (simgrid::kernel::context::Context::install_sigsegv_stack(true) == -1) {
126 XBT_WARN("Failed to register alternate signal stack: %s", strerror(errno));
130 struct sigaction action;
131 action.sa_sigaction = &segvhandler;
132 action.sa_flags = SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
133 sigemptyset(&action.sa_mask);
135 /* Linux tend to raise only SIGSEGV where other systems also raise SIGBUS on severe error */
136 for (int sig : {SIGSEGV, SIGBUS}) {
137 if (sigaction(sig, &action, nullptr) == -1)
138 XBT_WARN("Failed to register signal handler for signal %d: %s", sig, strerror(errno));
142 static simgrid::config::Flag<bool> cfg_dbg_clean_atexit{
143 "debug/clean-atexit", "Whether to cleanup SimGrid at exit. Disable it if your code segfaults after its end.", true};
145 namespace simgrid::kernel {
147 EngineImpl::~EngineImpl()
149 /* Also delete the other data */
150 delete netzone_root_;
151 for (auto const& [_, netpoint] : netpoints_)
154 for (auto const& [_, mailbox] : mailboxes_)
157 /* Kill all actors (but maestro) */
158 maestro_->kill_all();
163 delete context_factory_;
165 /* clear models before freeing handle, network models can use external callback defined in the handle */
166 models_prio_.clear();
169 void EngineImpl::initialize(int* argc, char** argv)
171 xbt_assert(EngineImpl::instance_ == nullptr,
172 "It is currently forbidden to create more than one instance of kernel::EngineImpl");
173 EngineImpl::instance_ = this;
175 // The communication initialization is done ASAP, as we need to get some init parameters from the MC for different
176 // layers. But instance_ needs to be created, as we send the address of some of its fields to the MC that wants to
177 // read them directly.
178 simgrid::mc::AppSide::initialize();
181 if (static bool inited = false; not inited) {
183 xbt_log_init(argc, argv);
185 simgrid::xbt::install_exception_handler();
187 sg_config_init(argc, argv);
190 cmdline_.assign(argv, argv + *argc);
192 instance_->context_mod_init();
194 install_signal_handlers();
196 /* register a function to be called after the environment creation */
197 s4u::Engine::on_platform_created_cb([this]() { this->presolve(); });
199 if (cfg_dbg_clean_atexit)
203 void EngineImpl::context_mod_init() const
205 xbt_assert(not instance_->has_context_factory());
207 #if HAVE_SMPI && defined(__NetBSD__)
208 smpi_init_options_internal(false);
209 std::string priv = config::get_value<std::string>("smpi/privatization");
210 if (context_factory_name == "thread" && (priv == "dlopen" || priv == "yes" || priv == "default" || priv == "1")) {
211 XBT_WARN("dlopen+thread broken on Apple and BSD. Switching to raw contexts.");
212 context_factory_name = "raw";
216 #if HAVE_SMPI && defined(__FreeBSD__)
217 smpi_init_options_internal(false);
218 if (context_factory_name == "thread" && config::get_value<std::string>("smpi/privatization") != "no") {
219 XBT_WARN("mmap broken on FreeBSD, but dlopen+thread broken too. Switching to dlopen+raw contexts.");
220 context_factory_name = "raw";
224 /* use the factory specified by --cfg=contexts/factory:value */
225 for (auto const& [factory_name, factory] : context_factories)
226 if (context_factory_name == factory_name) {
227 instance_->set_context_factory(factory());
231 if (not instance_->has_context_factory()) {
232 XBT_ERROR("Invalid context factory specified. Valid factories on this machine:");
233 #if HAVE_RAW_CONTEXTS
234 XBT_ERROR(" raw: high performance context factory implemented specifically for SimGrid");
236 XBT_ERROR(" (raw contexts were disabled at compilation time on this machine -- check configure logs for details)");
238 #if HAVE_UCONTEXT_CONTEXTS
239 XBT_ERROR(" ucontext: classical system V contexts (implemented with makecontext, swapcontext and friends)");
241 XBT_ERROR(" (ucontext was disabled at compilation time on this machine -- check configure logs for details)");
243 #if HAVE_BOOST_CONTEXTS
244 XBT_ERROR(" boost: this uses the boost libraries context implementation");
246 XBT_ERROR(" (boost was disabled at compilation time on this machine -- check configure logs for details. Did you "
247 "install the libboost-context-dev package?)");
249 XBT_ERROR(" thread: slow portability layer using standard threads as provided by libstdc");
250 xbt_die("Please use a valid factory.");
254 void EngineImpl::shutdown()
256 if (EngineImpl::instance_ == nullptr)
258 XBT_DEBUG("EngineImpl::shutdown() called. Simulation's over.");
260 if (not instance_->actor_list_.empty()) {
261 if (smpi_process() && smpi_process()->initialized()) {
262 xbt_die("Process exited without calling MPI_Finalize - Killing simulation");
264 XBT_WARN("Process called exit when leaving - Skipping cleanups");
270 if (instance_->has_actors_to_run() && simgrid_get_clock() <= 0.0) {
272 XBT_CRITICAL("The time is still 0, and you still have processes ready to run.");
273 XBT_CRITICAL("It seems that you forgot to run the simulation that you setup.");
274 xbt_die("Bailing out to avoid that stop-before-start madness. Please fix your code.");
277 while (not timer::kernel_timers().empty()) {
278 delete timer::kernel_timers().top().second;
279 timer::kernel_timers().pop();
283 sg_platf_parser_finalize();
289 void EngineImpl::seal_platform() const
292 static bool sealed = false;
297 /* seal netzone root, recursively seal children netzones, hosts and disks */
298 netzone_root_->seal();
301 void EngineImpl::load_platform(const std::string& platf)
303 double start = xbt_os_time();
304 if (boost::algorithm::ends_with(platf, ".so") || boost::algorithm::ends_with(platf, ".dylib")) {
305 void* handle = dlopen(platf.c_str(), RTLD_LAZY);
306 xbt_assert(handle, "Impossible to open platform file: %s", platf.c_str());
307 platf_handle_ = std::unique_ptr<void, std::function<int(void*)>>(handle, dlclose);
308 using load_fct_t = void (*)(const simgrid::s4u::Engine&);
309 auto callable = (load_fct_t)dlsym(platf_handle_.get(), "load_platform");
310 const char* dlsym_error = dlerror();
311 xbt_assert(not dlsym_error, "Error: %s", dlsym_error);
312 callable(*simgrid::s4u::Engine::get_instance());
314 parse_platform_file(platf);
317 double end = xbt_os_time();
318 XBT_DEBUG("PARSE TIME: %g", (end - start));
321 void EngineImpl::load_deployment(const std::string& file) const
323 sg_platf_parser_finalize();
325 simgrid_parse_open(file);
327 simgrid_parse_close();
330 void EngineImpl::register_function(const std::string& name, const actor::ActorCodeFactory& code)
332 registered_functions[name] = code;
334 void EngineImpl::register_default(const actor::ActorCodeFactory& code)
336 default_function = code;
339 void EngineImpl::add_model(std::shared_ptr<resource::Model> model, const std::vector<resource::Model*>& dependencies)
341 auto model_name = model->get_name();
342 xbt_assert(models_prio_.find(model_name) == models_prio_.end(),
343 "Model %s already exists, use model.set_name() to change its name", model_name.c_str());
345 for (const auto* dep : dependencies) {
346 xbt_assert(models_prio_.find(dep->get_name()) != models_prio_.end(),
347 "Model %s doesn't exists. Impossible to use it as dependency.", dep->get_name().c_str());
349 models_.push_back(model.get());
350 models_prio_[model_name] = std::move(model);
353 /** Wake up all actors waiting for an action to finish */
354 void EngineImpl::handle_ended_actions() const
356 for (auto const& model : models_) {
357 XBT_DEBUG("Handling the failed actions (if any)");
358 while (auto* action = model->extract_failed_action()) {
359 XBT_DEBUG(" Handling Action %p", action);
360 if (action->get_activity() != nullptr) { // Skip vcpu actions
361 // Action failures are not automatically reported when the action is started by maestro (as in SimDAG)
362 if (action->get_activity()->get_actor() == maestro_)
363 action->get_activity()->get_iface()->complete(s4u::Activity::State::FAILED);
365 activity::ActivityImplPtr(action->get_activity())->finish();
368 XBT_DEBUG("Handling the terminated actions (if any)");
369 while (auto* action = model->extract_done_action()) {
370 XBT_DEBUG(" Handling Action %p", action);
371 if (action->get_activity() != nullptr) {
372 // Action termination are not automatically reported when the action is started by maestro (as in SimDAG)
373 action->get_activity()->set_finish_time(action->get_finish_time());
375 if (action->get_activity()->get_actor() == maestro_)
376 action->get_activity()->get_iface()->complete(s4u::Activity::State::FINISHED);
378 activity::ActivityImplPtr(action->get_activity())->finish();
384 * @brief Executes the actors in actors_to_run.
386 * The actors in actors_to_run are run (in parallel if possible). On exit, actors_to_run is empty, and actors_that_ran
387 * contains the list of actors that just ran. The two lists are swapped so, be careful when using them before and after
388 * a call to this function.
390 void EngineImpl::run_all_actors()
392 instance_->get_context_factory()->run_all(actors_to_run_);
394 for (auto const& actor : actors_to_run_)
395 if (actor->to_be_freed())
396 actor->cleanup_from_kernel();
398 actors_to_run_.swap(actors_that_ran_);
399 actors_to_run_.clear();
402 actor::ActorImpl* EngineImpl::get_actor_by_pid(aid_t pid)
404 auto item = actor_list_.find(pid);
405 return item == actor_list_.end() ? nullptr : item->second;
408 void EngineImpl::remove_daemon(actor::ActorImpl* actor)
410 auto it = daemons_.find(actor);
411 xbt_assert(it != daemons_.end(), "The dying daemon is not a daemon after all. Please report that bug.");
415 void EngineImpl::add_actor_to_run_list_no_check(actor::ActorImpl* actor)
417 XBT_DEBUG("Inserting [%p] %s(%s) in the to_run list", actor, actor->get_cname(), actor->get_host()->get_cname());
418 actors_to_run_.push_back(actor);
421 void EngineImpl::add_actor_to_run_list(actor::ActorImpl* actor)
423 if (std::find(begin(actors_to_run_), end(actors_to_run_), actor) != end(actors_to_run_)) {
424 XBT_DEBUG("Actor %s is already in the to_run list", actor->get_cname());
426 XBT_DEBUG("Inserting [%p] %s(%s) in the to_run list", actor, actor->get_cname(), actor->get_host()->get_cname());
427 actors_to_run_.push_back(actor);
430 void EngineImpl::empty_trash()
432 while (not actors_to_destroy_.empty()) {
433 actor::ActorImpl* actor = &actors_to_destroy_.front();
434 actors_to_destroy_.pop_front();
435 XBT_DEBUG("Getting rid of %s (refcount: %d)", actor->get_cname(), actor->get_refcount());
436 intrusive_ptr_release(actor);
440 void EngineImpl::display_all_actor_status() const
442 XBT_INFO("%zu actors are still running, waiting for something.", actor_list_.size());
443 /* List the actors and their state */
444 XBT_INFO("Legend of the following listing: \"Actor <pid> (<name>@<host>): <status>\"");
445 for (auto const& [_, actor] : actor_list_) {
446 if (actor->waiting_synchro_) {
447 const char* synchro_description = "unknown";
449 if (boost::dynamic_pointer_cast<kernel::activity::ExecImpl>(actor->waiting_synchro_) != nullptr)
450 synchro_description = "execution";
452 if (boost::dynamic_pointer_cast<kernel::activity::CommImpl>(actor->waiting_synchro_) != nullptr)
453 synchro_description = "communication";
455 if (boost::dynamic_pointer_cast<kernel::activity::SleepImpl>(actor->waiting_synchro_) != nullptr)
456 synchro_description = "sleeping";
458 if (boost::dynamic_pointer_cast<kernel::activity::SynchroImpl>(actor->waiting_synchro_) != nullptr)
459 synchro_description = "synchronization";
461 if (boost::dynamic_pointer_cast<kernel::activity::IoImpl>(actor->waiting_synchro_) != nullptr)
462 synchro_description = "I/O";
464 XBT_INFO("Actor %ld (%s@%s): waiting for %s activity %#zx (%s) in state %s to finish %s", actor->get_pid(),
465 actor->get_cname(), actor->get_host()->get_cname(), synchro_description,
466 (xbt_log_no_loc ? (size_t)0xDEADBEEF : (size_t)actor->waiting_synchro_.get()),
467 actor->waiting_synchro_->get_cname(), actor->waiting_synchro_->get_state_str(),
468 (actor->simcall_.observer_ != nullptr && not xbt_log_no_loc
469 ? actor->simcall_.observer_->to_string().c_str()
472 XBT_INFO("Actor %ld (%s@%s) simcall %s", actor->get_pid(), actor->get_cname(), actor->get_host()->get_cname(),
473 (actor->simcall_.observer_ != nullptr ? actor->simcall_.observer_->to_string().c_str()
474 : actor->simcall_.get_cname()));
479 void EngineImpl::presolve() const
481 XBT_DEBUG("Consume all trace events occurring before the starting time.");
482 double next_event_date;
483 while ((next_event_date = profile::future_evt_set.next_date()) != -1.0) {
484 if (next_event_date > now_)
488 resource::Resource* resource = nullptr;
489 while (auto* event = profile::future_evt_set.pop_leq(next_event_date, &value, &resource)) {
491 resource->apply_event(event, value);
495 XBT_DEBUG("Set every models in the right state by updating them to 0.");
496 for (auto const& model : models_)
497 model->update_actions_state(now_, 0.0);
500 double EngineImpl::solve(double max_date) const
502 double time_delta = -1.0; /* duration */
504 resource::Resource* resource = nullptr;
506 if (max_date != -1.0) {
507 xbt_assert(max_date >= now_, "You asked to simulate up to %f, but that's in the past already", max_date);
509 time_delta = max_date - now_;
512 XBT_DEBUG("Looking for next event in all models");
513 for (auto model : models_) {
514 if (not model->next_occurring_event_is_idempotent()) {
517 double next_event = model->next_occurring_event(now_);
518 if ((time_delta < 0.0 || next_event < time_delta) && next_event >= 0.0) {
519 time_delta = next_event;
523 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
525 XBT_DEBUG("Looking for next trace event");
527 while (true) { // Handle next occurring events until none remains
528 double next_event_date = profile::future_evt_set.next_date();
529 XBT_DEBUG("Next TRACE event: %f", next_event_date);
531 for (auto model : models_) {
532 /* Skip all idempotent models, they were already treated above
533 * NS3 is the one to handled here */
534 if (model->next_occurring_event_is_idempotent())
537 if (next_event_date != -1.0) {
538 time_delta = std::min(next_event_date - now_, time_delta);
540 time_delta = std::max(next_event_date - now_, time_delta); // Get the positive component
543 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
544 // run until min or next flow
545 double model_next_action_end = model->next_occurring_event(time_delta);
547 XBT_DEBUG("Min for network : %f", model_next_action_end);
548 if (model_next_action_end >= 0.0)
549 time_delta = model_next_action_end;
552 if (next_event_date < 0.0 || (next_event_date > now_ + time_delta)) {
553 // next event may have already occurred or will after the next resource change, then bail out
554 XBT_DEBUG("no next usable TRACE event. Stop searching for it");
558 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, now_, next_event_date);
560 while (auto* event = profile::future_evt_set.pop_leq(next_event_date, &value, &resource)) {
563 if (resource->is_used()) {
564 time_delta = next_event_date - now_;
565 XBT_DEBUG("This event invalidates the next_occurring_event() computation of models. Next event set to %f",
568 // FIXME: I'm too lame to update now_ live, so I change it and restore it so that the real update works
569 double round_start = now_;
570 now_ = next_event_date;
571 /* update state of the corresponding resource to the new value. Does not touch lmm.
572 It will be modified if needed when updating actions */
573 XBT_DEBUG("Calling update_resource_state for resource %s", resource->get_cname());
574 resource->apply_event(event, value);
579 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are
580 * with availability = 0. This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a
581 * trace with periodicity > 0.
582 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed
584 if (time_delta < 0) {
585 XBT_DEBUG("No next event at all. Bail out now.");
589 XBT_DEBUG("Duration set to %f", time_delta);
591 // Bump the time: jump into the future
594 // Inform the models of the date change
595 for (auto const& model : models_)
596 model->update_actions_state(now_, time_delta);
598 s4u::Engine::on_time_advance(time_delta);
603 void EngineImpl::run(double max_date)
607 if (MC_is_active()) {
609 mc::AppSide::get()->main_loop();
611 xbt_die("MC_is_active() is not supposed to return true in non-MC settings");
613 THROW_IMPOSSIBLE; // main_loop never returns
616 if (MC_record_replay_is_active()) {
617 mc::RecordTrace::replay(MC_record_path());
622 double elapsed_time = -1;
623 const std::set<s4u::Activity*>* vetoed_activities = s4u::Activity::get_vetoed_activities();
626 XBT_DEBUG("New Schedule Round; size(queue)=%zu", actors_to_run_.size());
628 if (cfg_breakpoint >= 0.0 && simgrid_get_clock() >= cfg_breakpoint) {
629 XBT_DEBUG("Breakpoint reached (%g)", cfg_breakpoint.get());
630 cfg_breakpoint = -1.0; // Let the simulation continue without hiting the breakpoint again and again
638 while (not actors_to_run_.empty()) {
639 XBT_DEBUG("New Sub-Schedule Round; size(queue)=%zu", actors_to_run_.size());
641 /* Run all actors that are ready to run, possibly in parallel */
644 /* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round.
645 * The order must be fixed for the simulation to be reproducible (see RR-7653). It's OK here because only maestro
646 * changes the list. Killer actors are moved to the end to let victims finish their simcall before dying, but
647 * the order remains reproducible (even if arbitrarily). No need to sort the vector for sake of reproducibility.
649 for (auto const& actor : actors_that_ran_)
650 if (actor->simcall_.call_ != actor::Simcall::Type::NONE)
651 actor->simcall_handle(0);
653 handle_ended_actions();
655 /* If only daemon actors remain, cancel their actions, mark them to die and reschedule them */
656 if (actor_list_.size() == daemons_.size())
657 for (auto const& dmon : daemons_) {
658 XBT_DEBUG("Kill %s", dmon->get_cname());
659 maestro_->kill(dmon);
663 // Compute the max_date of the next solve.
664 // It's either when a timer occurs, or when user-specified deadline is reached, or -1 if none is given
665 double next_time = timer::Timer::next();
666 if (next_time < 0 && max_date > -1) {
667 next_time = max_date;
668 } else if (next_time > -1 && max_date > -1) { // either both <0, or both >0
669 next_time = std::min(next_time, max_date);
672 XBT_DEBUG("Calling solve(%g) %g", next_time, now_);
673 elapsed_time = solve(next_time);
674 XBT_DEBUG("Moving time ahead. NOW=%g; elapsed: %g", now_, elapsed_time);
676 // Execute timers until there isn't anything to be done:
679 again = timer::Timer::execute_all();
680 handle_ended_actions();
683 /* Clean actors to destroy */
686 XBT_DEBUG("### elapsed time %f, #actors %zu, #to_run %zu, #vetoed %d", elapsed_time, actor_list_.size(),
687 actors_to_run_.size(), (vetoed_activities == nullptr ? -1 : static_cast<int>(vetoed_activities->size())));
689 if (elapsed_time < 0. && actors_to_run_.empty() && not actor_list_.empty()) {
690 if (actor_list_.size() <= daemons_.size()) {
691 XBT_CRITICAL("Oops! Daemon actors cannot do any blocking activity (communications, synchronization, etc) "
692 "once the simulation is over. Please fix your on_exit() functions.");
694 XBT_CRITICAL("Oops! Deadlock detected, some activities are still around but will never complete. "
695 "This usually happens when the user code is not perfectly clean.");
697 display_all_actor_status();
698 simgrid::s4u::Engine::on_deadlock();
699 for (auto const& [_, actor] : actor_list_) {
700 XBT_DEBUG("Kill %s", actor->get_cname());
701 maestro_->kill(actor);
704 } while ((vetoed_activities == nullptr || vetoed_activities->empty()) &&
705 ((elapsed_time > -1.0 && not double_equals(max_date, now_, 0.00001)) || has_actors_to_run()));
707 if (not actor_list_.empty() && max_date < 0 && not(vetoed_activities == nullptr || vetoed_activities->empty()))
710 simgrid::s4u::Engine::on_simulation_end();
713 double EngineImpl::get_clock()
717 } // namespace simgrid::kernel