1 /* Copyright (c) 2016-2022. 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>
11 #include <simgrid/sg_config.hpp>
14 #include "src/kernel/EngineImpl.hpp"
15 #include "src/kernel/resource/StandardLinkImpl.hpp"
16 #include "src/kernel/resource/profile/Profile.hpp"
17 #include "src/mc/mc_record.hpp"
18 #include "src/mc/mc_replay.hpp"
19 #include "src/smpi/include/smpi_actor.hpp"
20 #include "src/surf/xml/platf.hpp"
21 #include "xbt/module.h"
22 #include "xbt/xbt_modinter.h" /* whether initialization was already done */
24 #include <boost/algorithm/string/predicate.hpp>
30 #include "src/mc/remote/AppSide.hpp"
33 XBT_LOG_NEW_DEFAULT_CATEGORY(ker_engine, "Logging specific to Engine (kernel)");
37 double EngineImpl::now_ = 0.0;
38 EngineImpl* EngineImpl::instance_ = nullptr; /* That singleton is awful too. */
40 config::Flag<double> cfg_breakpoint{"debug/breakpoint",
41 "When non-negative, raise a SIGTRAP after given (simulated) time", -1.0};
42 config::Flag<bool> cfg_verbose_exit{"debug/verbose-exit", "Display the actor status at exit", true};
44 constexpr std::initializer_list<std::pair<const char*, context::ContextFactory* (*)()>> context_factories = {
46 {"raw", &context::raw_factory},
48 #if HAVE_UCONTEXT_CONTEXTS
49 {"ucontext", &context::sysv_factory},
51 #if HAVE_BOOST_CONTEXTS
52 {"boost", &context::boost_factory},
54 {"thread", &context::thread_factory},
57 static_assert(context_factories.size() > 0, "No context factories are enabled for this build");
59 // Create the list of possible contexts:
60 static inline std::string contexts_list()
64 for (auto const& factory : context_factories) {
65 res += sep + factory.first;
71 static config::Flag<std::string> context_factory_name("contexts/factory",
72 (std::string("Possible values: ") + contexts_list()).c_str(),
73 context_factories.begin()->first);
76 } // namespace simgrid
78 XBT_ATTRIB_NORETURN static void inthandler(int)
80 if (simgrid::kernel::cfg_verbose_exit) {
81 XBT_INFO("CTRL-C pressed. The current status will be displayed before exit (disable that behavior with option "
82 "'debug/verbose-exit').");
83 simgrid::kernel::EngineImpl::get_instance()->display_all_actor_status();
85 XBT_INFO("CTRL-C pressed, exiting. Hiding the current process status since 'debug/verbose-exit' is set to false.");
91 static void segvhandler(int signum, siginfo_t* siginfo, void* /*context*/)
93 if ((siginfo->si_signo == SIGSEGV && siginfo->si_code == SEGV_ACCERR) || siginfo->si_signo == SIGBUS) {
95 "Access violation or Bus error detected.\n"
96 "This probably comes from a programming error in your code, or from a stack\n"
97 "overflow. If you are certain of your code, try increasing the stack size\n"
98 " --cfg=contexts/stack-size:XXX (current size is %u KiB).\n"
100 "If it does not help, this may have one of the following causes:\n"
101 "a bug in SimGrid, a bug in the OS or a bug in a third-party libraries.\n"
102 "Failing hardware can sometimes generate such errors too.\n"
104 "If you think you've found a bug in SimGrid, please report it along with a\n"
105 "Minimal Working Example (MWE) reproducing your problem and a full backtrace\n"
106 "of the fault captured with gdb or valgrind.\n",
107 simgrid::kernel::context::stack_size / 1024);
108 } else if (siginfo->si_signo == SIGSEGV) {
109 fprintf(stderr, "Segmentation fault.\n");
111 if (smpi_enabled() && smpi_cfg_privatization() == SmpiPrivStrategies::NONE) {
112 #if HAVE_PRIVATIZATION
113 fprintf(stderr, "Try to enable SMPI variable privatization with --cfg=smpi/privatization:yes.\n");
115 fprintf(stderr, "Sadly, your system does not support --cfg=smpi/privatization:yes (yet).\n");
116 #endif /* HAVE_PRIVATIZATION */
118 #endif /* HAVE_SMPI */
124 * Install signal handler for SIGSEGV. Check that nobody has already installed
125 * its own handler. For example, the Java VM does this.
127 static void install_segvhandler()
131 if (simgrid::kernel::context::Context::install_sigsegv_stack(&old_stack, true) == -1) {
132 XBT_WARN("Failed to register alternate signal stack: %s", strerror(errno));
135 if (not(old_stack.ss_flags & SS_DISABLE)) {
136 XBT_DEBUG("An alternate stack was already installed (sp=%p, size=%zu, flags=%x). Restore it.", old_stack.ss_sp,
137 old_stack.ss_size, (unsigned)old_stack.ss_flags);
138 sigaltstack(&old_stack, nullptr);
141 struct sigaction action;
142 struct sigaction old_action;
143 action.sa_sigaction = &segvhandler;
144 action.sa_flags = SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
145 sigemptyset(&action.sa_mask);
147 /* Linux tend to raise only SIGSEGV where other systems also raise SIGBUS on severe error */
148 for (int sig : {SIGSEGV, SIGBUS}) {
149 if (sigaction(sig, &action, &old_action) == -1) {
150 XBT_WARN("Failed to register signal handler for signal %d: %s", sig, strerror(errno));
153 if ((old_action.sa_flags & SA_SIGINFO) || old_action.sa_handler != SIG_DFL) {
154 XBT_DEBUG("A signal handler was already installed for signal %d (%p). Restore it.", sig,
155 (old_action.sa_flags & SA_SIGINFO) ? (void*)old_action.sa_sigaction : (void*)old_action.sa_handler);
156 sigaction(sig, &old_action, nullptr);
166 EngineImpl::~EngineImpl()
168 /* Since hosts_ is a std::map, the hosts are destroyed in the lexicographic order, which ensures that the output is
171 while (not hosts_.empty())
172 hosts_.begin()->second->destroy();
174 /* Also delete the other data */
175 delete netzone_root_;
176 for (auto const& kv : netpoints_)
179 while (not links_.empty())
180 links_.begin()->second->destroy();
182 for (auto const& kv : mailboxes_)
185 /* Kill all actors (but maestro) */
186 maestro_->kill_all();
191 delete context_factory_;
193 /* Free the remaining data structures */
195 xbt_dynar_free(&actors_vector_);
197 /* clear models before freeing handle, network models can use external callback defined in the handle */
198 models_prio_.clear();
201 void EngineImpl::initialize(int* argc, char** argv)
203 xbt_assert(EngineImpl::instance_ == nullptr,
204 "It is currently forbidden to create more than one instance of kernel::EngineImpl");
205 EngineImpl::instance_ = this;
207 // The communication initialization is done ASAP, as we need to get some init parameters from the MC for different
208 // layers. But instance_ needs to be created, as we send the address of some of its fields to the MC that wants to
209 // read them directly.
210 simgrid::mc::AppSide::initialize(actors_vector_);
213 if (xbt_initialized == 0) {
214 xbt_init(argc, argv);
216 sg_config_init(argc, argv);
219 instance_->context_mod_init();
221 /* Prepare to display some more info when dying on Ctrl-C pressing */
222 std::signal(SIGINT, inthandler);
225 install_segvhandler();
228 /* register a function to be called by SURF after the environment creation */
230 s4u::Engine::on_platform_created_cb([this]() { this->presolve(); });
232 if (config::get_value<bool>("debug/clean-atexit"))
236 void EngineImpl::context_mod_init() const
238 xbt_assert(not instance_->has_context_factory());
240 #if HAVE_SMPI && defined(__NetBSD__)
241 smpi_init_options_internal(false);
242 std::string priv = config::get_value<std::string>("smpi/privatization");
243 if (context_factory_name == "thread" && (priv == "dlopen" || priv == "yes" || priv == "default" || priv == "1")) {
244 XBT_WARN("dlopen+thread broken on Apple and BSD. Switching to raw contexts.");
245 context_factory_name = "raw";
249 #if HAVE_SMPI && defined(__FreeBSD__)
250 smpi_init_options_internal(false);
251 if (context_factory_name == "thread" && config::get_value<std::string>("smpi/privatization") != "no") {
252 XBT_WARN("mmap broken on FreeBSD, but dlopen+thread broken too. Switching to dlopen+raw contexts.");
253 context_factory_name = "raw";
257 /* select the context factory to use to create the contexts */
258 if (context::ContextFactory::initializer) { // Give Java a chance to hijack the factory mechanism
259 instance_->set_context_factory(context::ContextFactory::initializer());
262 /* use the factory specified by --cfg=contexts/factory:value */
263 for (auto const& factory : context_factories)
264 if (context_factory_name == factory.first) {
265 instance_->set_context_factory(factory.second());
269 if (not instance_->has_context_factory()) {
270 XBT_ERROR("Invalid context factory specified. Valid factories on this machine:");
271 #if HAVE_RAW_CONTEXTS
272 XBT_ERROR(" raw: high performance context factory implemented specifically for SimGrid");
274 XBT_ERROR(" (raw contexts were disabled at compilation time on this machine -- check configure logs for details)");
276 #if HAVE_UCONTEXT_CONTEXTS
277 XBT_ERROR(" ucontext: classical system V contexts (implemented with makecontext, swapcontext and friends)");
279 XBT_ERROR(" (ucontext was disabled at compilation time on this machine -- check configure logs for details)");
281 #if HAVE_BOOST_CONTEXTS
282 XBT_ERROR(" boost: this uses the boost libraries context implementation");
284 XBT_ERROR(" (boost was disabled at compilation time on this machine -- check configure logs for details. Did you "
285 "install the libboost-context-dev package?)");
287 XBT_ERROR(" thread: slow portability layer using pthreads as provided by gcc");
288 xbt_die("Please use a valid factory.");
292 void EngineImpl::shutdown()
294 if (EngineImpl::instance_ == nullptr)
296 XBT_DEBUG("EngineImpl::shutdown() called. Simulation's over.");
298 if (not instance_->actor_list_.empty()) {
299 if (smpi_process()->initialized()) {
300 xbt_die("Process exited without calling MPI_Finalize - Killing simulation");
302 XBT_WARN("Process called exit when leaving - Skipping cleanups");
308 if (instance_->has_actors_to_run() && simgrid_get_clock() <= 0.0) {
310 XBT_CRITICAL("The time is still 0, and you still have processes ready to run.");
311 XBT_CRITICAL("It seems that you forgot to run the simulation that you setup.");
312 xbt_die("Bailing out to avoid that stop-before-start madness. Please fix your code.");
315 while (not timer::kernel_timers().empty()) {
316 delete timer::kernel_timers().top().second;
317 timer::kernel_timers().pop();
327 void EngineImpl::seal_platform() const
330 static bool sealed = false;
335 /* sealing resources before run: links */
336 for (auto const& kv : links_)
337 kv.second->get_iface()->seal();
338 /* seal netzone root, recursively seal children netzones, hosts and disks */
339 netzone_root_->seal();
342 void EngineImpl::load_platform(const std::string& platf)
344 double start = xbt_os_time();
345 if (boost::algorithm::ends_with(platf, ".so") || boost::algorithm::ends_with(platf, ".dylib")) {
347 xbt_die("loading platform through shared library isn't supported on windows");
349 void* handle = dlopen(platf.c_str(), RTLD_LAZY);
350 xbt_assert(handle, "Impossible to open platform file: %s", platf.c_str());
351 platf_handle_ = std::unique_ptr<void, std::function<int(void*)>>(handle, dlclose);
352 using load_fct_t = void (*)(const simgrid::s4u::Engine&);
353 auto callable = (load_fct_t)dlsym(platf_handle_.get(), "load_platform");
354 const char* dlsym_error = dlerror();
355 xbt_assert(not dlsym_error, "Error: %s", dlsym_error);
356 callable(*simgrid::s4u::Engine::get_instance());
359 parse_platform_file(platf);
362 double end = xbt_os_time();
363 XBT_DEBUG("PARSE TIME: %g", (end - start));
366 void EngineImpl::load_deployment(const std::string& file) const
371 surf_parse_open(file);
376 void EngineImpl::register_function(const std::string& name, const actor::ActorCodeFactory& code)
378 registered_functions[name] = code;
380 void EngineImpl::register_default(const actor::ActorCodeFactory& code)
382 default_function = code;
385 void EngineImpl::add_model(std::shared_ptr<resource::Model> model, const std::vector<resource::Model*>& dependencies)
387 auto model_name = model->get_name();
388 xbt_assert(models_prio_.find(model_name) == models_prio_.end(),
389 "Model %s already exists, use model.set_name() to change its name", model_name.c_str());
391 for (const auto dep : dependencies) {
392 xbt_assert(models_prio_.find(dep->get_name()) != models_prio_.end(),
393 "Model %s doesn't exists. Impossible to use it as dependency.", dep->get_name().c_str());
395 models_.push_back(model.get());
396 models_prio_[model_name] = std::move(model);
399 void EngineImpl::add_split_duplex_link(const std::string& name, std::unique_ptr<resource::SplitDuplexLinkImpl> link)
401 split_duplex_links_[name] = std::move(link);
404 /** Wake up all actors waiting for a Surf action to finish */
405 void EngineImpl::handle_ended_actions() const
407 for (auto const& model : models_) {
408 XBT_DEBUG("Handling the failed actions (if any)");
409 while (auto* action = model->extract_failed_action()) {
410 XBT_DEBUG(" Handling Action %p", action);
411 if (action->get_activity() != nullptr) { // Skip vcpu actions
412 // Action failures are not automatically reported when the action is started by maestro (as in SimDAG)
413 if (action->get_activity()->get_actor() == maestro_)
414 action->get_activity()->get_iface()->complete(s4u::Activity::State::FAILED);
416 activity::ActivityImplPtr(action->get_activity())->post();
419 XBT_DEBUG("Handling the terminated actions (if any)");
420 while (auto* action = model->extract_done_action()) {
421 XBT_DEBUG(" Handling Action %p", action);
422 if (action->get_activity() != nullptr) {
423 // Action termination are not automatically reported when the action is started by maestro (as in SimDAG)
424 action->get_activity()->set_finish_time(action->get_finish_time());
426 if (action->get_activity()->get_actor() == maestro_)
427 action->get_activity()->get_iface()->complete(s4u::Activity::State::FINISHED);
429 activity::ActivityImplPtr(action->get_activity())->post();
435 * @brief Executes the actors in actors_to_run.
437 * The actors in actors_to_run are run (in parallel if possible). On exit, actors_to_run is empty, and actors_that_ran
438 * contains the list of actors that just ran. The two lists are swapped so, be careful when using them before and after
439 * a call to this function.
441 void EngineImpl::run_all_actors()
443 instance_->get_context_factory()->run_all(actors_to_run_);
445 for (auto const& actor : actors_to_run_)
446 if (actor->to_be_freed())
447 actor->cleanup_from_kernel();
449 actors_to_run_.swap(actors_that_ran_);
450 actors_to_run_.clear();
453 actor::ActorImpl* EngineImpl::get_actor_by_pid(aid_t pid)
455 auto item = actor_list_.find(pid);
456 if (item != actor_list_.end())
459 return nullptr; // Not found
462 void EngineImpl::remove_daemon(actor::ActorImpl* actor)
464 auto it = daemons_.find(actor);
465 xbt_assert(it != daemons_.end(), "The dying daemon is not a daemon after all. Please report that bug.");
469 void EngineImpl::add_actor_to_run_list_no_check(actor::ActorImpl* actor)
471 XBT_DEBUG("Inserting [%p] %s(%s) in the to_run list", actor, actor->get_cname(), actor->get_host()->get_cname());
472 actors_to_run_.push_back(actor);
475 void EngineImpl::add_actor_to_run_list(actor::ActorImpl* actor)
477 if (std::find(begin(actors_to_run_), end(actors_to_run_), actor) != end(actors_to_run_)) {
478 XBT_DEBUG("Actor %s is already in the to_run list", actor->get_cname());
480 XBT_DEBUG("Inserting [%p] %s(%s) in the to_run list", actor, actor->get_cname(), actor->get_host()->get_cname());
481 actors_to_run_.push_back(actor);
484 void EngineImpl::empty_trash()
486 while (not actors_to_destroy_.empty()) {
487 actor::ActorImpl* actor = &actors_to_destroy_.front();
488 actors_to_destroy_.pop_front();
489 XBT_DEBUG("Getting rid of %s (refcount: %d)", actor->get_cname(), actor->get_refcount());
490 intrusive_ptr_release(actor);
494 void EngineImpl::display_all_actor_status() const
496 XBT_INFO("%zu actors are still running, waiting for something.", actor_list_.size());
497 /* List the actors and their state */
498 XBT_INFO("Legend of the following listing: \"Actor <pid> (<name>@<host>): <status>\"");
499 for (auto const& kv : actor_list_) {
500 const actor::ActorImpl* actor = kv.second;
502 if (actor->waiting_synchro_) {
503 const char* synchro_description = "unknown";
505 if (boost::dynamic_pointer_cast<kernel::activity::ExecImpl>(actor->waiting_synchro_) != nullptr)
506 synchro_description = "execution";
508 if (boost::dynamic_pointer_cast<kernel::activity::CommImpl>(actor->waiting_synchro_) != nullptr)
509 synchro_description = "communication";
511 if (boost::dynamic_pointer_cast<kernel::activity::SleepImpl>(actor->waiting_synchro_) != nullptr)
512 synchro_description = "sleeping";
514 if (boost::dynamic_pointer_cast<kernel::activity::SynchroImpl>(actor->waiting_synchro_) != nullptr)
515 synchro_description = "synchronization";
517 if (boost::dynamic_pointer_cast<kernel::activity::IoImpl>(actor->waiting_synchro_) != nullptr)
518 synchro_description = "I/O";
520 XBT_INFO("Actor %ld (%s@%s): waiting for %s activity %#zx (%s) in state %s to finish", actor->get_pid(),
521 actor->get_cname(), actor->get_host()->get_cname(), synchro_description,
522 (xbt_log_no_loc ? (size_t)0xDEADBEEF : (size_t)actor->waiting_synchro_.get()),
523 actor->waiting_synchro_->get_cname(), actor->waiting_synchro_->get_state_str());
525 XBT_INFO("Actor %ld (%s@%s) simcall %s", actor->get_pid(), actor->get_cname(), actor->get_host()->get_cname(),
526 actor->simcall_.get_cname());
531 void EngineImpl::presolve() const
533 XBT_DEBUG("Consume all trace events occurring before the starting time.");
534 double next_event_date;
535 while ((next_event_date = profile::future_evt_set.next_date()) != -1.0) {
536 if (next_event_date > now_)
540 resource::Resource* resource = nullptr;
541 while (auto* event = profile::future_evt_set.pop_leq(next_event_date, &value, &resource)) {
543 resource->apply_event(event, value);
547 XBT_DEBUG("Set every models in the right state by updating them to 0.");
548 for (auto const& model : models_)
549 model->update_actions_state(now_, 0.0);
552 double EngineImpl::solve(double max_date) const
554 double time_delta = -1.0; /* duration */
556 resource::Resource* resource = nullptr;
558 if (max_date != -1.0) {
559 xbt_assert(max_date >= now_, "You asked to simulate up to %f, but that's in the past already", max_date);
561 time_delta = max_date - now_;
564 XBT_DEBUG("Looking for next event in all models");
565 for (auto model : models_) {
566 if (not model->next_occurring_event_is_idempotent()) {
569 double next_event = model->next_occurring_event(now_);
570 if ((time_delta < 0.0 || next_event < time_delta) && next_event >= 0.0) {
571 time_delta = next_event;
575 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
577 XBT_DEBUG("Looking for next trace event");
579 while (true) { // Handle next occurring events until none remains
580 double next_event_date = profile::future_evt_set.next_date();
581 XBT_DEBUG("Next TRACE event: %f", next_event_date);
583 for (auto model : models_) {
584 /* Skip all idempotent models, they were already treated above
585 * NS3 is the one to handled here */
586 if (model->next_occurring_event_is_idempotent())
589 if (next_event_date != -1.0) {
590 time_delta = std::min(next_event_date - now_, time_delta);
592 time_delta = std::max(next_event_date - now_, time_delta); // Get the positive component
595 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
596 // run until min or next flow
597 double model_next_action_end = model->next_occurring_event(time_delta);
599 XBT_DEBUG("Min for network : %f", model_next_action_end);
600 if (model_next_action_end >= 0.0)
601 time_delta = model_next_action_end;
604 if (next_event_date < 0.0 || (next_event_date > now_ + time_delta)) {
605 // next event may have already occurred or will after the next resource change, then bail out
606 XBT_DEBUG("no next usable TRACE event. Stop searching for it");
610 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, now_, next_event_date);
612 while (auto* event = profile::future_evt_set.pop_leq(next_event_date, &value, &resource)) {
613 if (resource->is_used() || (watched_hosts().find(resource->get_cname()) != watched_hosts().end())) {
614 time_delta = next_event_date - now_;
615 XBT_DEBUG("This event invalidates the next_occurring_event() computation of models. Next event set to %f",
618 // FIXME: I'm too lame to update now_ live, so I change it and restore it so that the real update with surf_min
620 double round_start = now_;
621 now_ = next_event_date;
622 /* update state of the corresponding resource to the new value. Does not touch lmm.
623 It will be modified if needed when updating actions */
624 XBT_DEBUG("Calling update_resource_state for resource %s", resource->get_cname());
625 resource->apply_event(event, value);
630 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are
631 * with availability = 0. This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a
632 * trace with periodicity > 0.
633 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed
635 if (time_delta < 0) {
636 XBT_DEBUG("No next event at all. Bail out now.");
640 XBT_DEBUG("Duration set to %f", time_delta);
642 // Bump the time: jump into the future
645 // Inform the models of the date change
646 for (auto const& model : models_)
647 model->update_actions_state(now_, time_delta);
649 s4u::Engine::on_time_advance(time_delta);
654 void EngineImpl::run(double max_date)
658 if (MC_is_active()) {
660 mc::AppSide::get()->main_loop();
662 xbt_die("MC_is_active() is not supposed to return true in non-MC settings");
664 THROW_IMPOSSIBLE; // main_loop never returns
667 if (MC_record_replay_is_active()) {
668 mc::RecordTrace::replay(MC_record_path());
673 double elapsed_time = -1;
674 const std::set<s4u::Activity*>* vetoed_activities = s4u::Activity::get_vetoed_activities();
677 XBT_DEBUG("New Schedule Round; size(queue)=%zu", actors_to_run_.size());
679 if (cfg_breakpoint >= 0.0 && simgrid_get_clock() >= cfg_breakpoint) {
680 XBT_DEBUG("Breakpoint reached (%g)", cfg_breakpoint.get());
681 cfg_breakpoint = -1.0; // Let the simulation continue without hiting the breakpoint again and again
689 while (not actors_to_run_.empty()) {
690 XBT_DEBUG("New Sub-Schedule Round; size(queue)=%zu", actors_to_run_.size());
692 /* Run all actors that are ready to run, possibly in parallel */
695 /* answer sequentially and in a fixed arbitrary order all the simcalls that were issued during that sub-round.
696 * The order must be fixed for the simulation to be reproducible (see RR-7653). It's OK here because only maestro
697 * changes the list. Killer actors are moved to the end to let victims finish their simcall before dying, but
698 * the order remains reproducible (even if arbitrarily). No need to sort the vector for sake of reproducibility.
700 for (auto const& actor : actors_that_ran_)
701 if (actor->simcall_.call_ != actor::Simcall::Type::NONE)
702 actor->simcall_handle(0);
704 handle_ended_actions();
706 /* If only daemon actors remain, cancel their actions, mark them to die and reschedule them */
707 if (actor_list_.size() == daemons_.size())
708 for (auto const& dmon : daemons_) {
709 XBT_DEBUG("Kill %s", dmon->get_cname());
710 maestro_->kill(dmon);
714 // Compute the max_date of the next solve.
715 // It's either when a timer occurs, or when user-specified deadline is reached, or -1 if none is given
716 double next_time = timer::Timer::next();
717 if (next_time < 0 && max_date > -1) {
718 next_time = max_date;
719 } else if (next_time > -1 && max_date > -1) { // either both <0, or both >0
720 next_time = std::min(next_time, max_date);
723 XBT_DEBUG("Calling solve(%g) %g", next_time, now_);
724 elapsed_time = solve(next_time);
725 XBT_DEBUG("Moving time ahead. NOW=%g; elapsed: %g", now_, elapsed_time);
727 // Execute timers until there isn't anything to be done:
730 again = timer::Timer::execute_all();
731 handle_ended_actions();
734 /* Clean actors to destroy */
737 XBT_DEBUG("### elapsed time %f, #actors %zu, #to_run %zu, #vetoed %d", elapsed_time, actor_list_.size(),
738 actors_to_run_.size(), (vetoed_activities == nullptr ? -1 : static_cast<int>(vetoed_activities->size())));
740 if (elapsed_time < 0. && actors_to_run_.empty() && not actor_list_.empty()) {
741 if (actor_list_.size() <= daemons_.size()) {
742 XBT_CRITICAL("Oops! Daemon actors cannot do any blocking activity (communications, synchronization, etc) "
743 "once the simulation is over. Please fix your on_exit() functions.");
745 XBT_CRITICAL("Oops! Deadlock detected, some activities are still around but will never complete. "
746 "This usually happens when the user code is not perfectly clean.");
748 display_all_actor_status();
749 simgrid::s4u::Engine::on_deadlock();
750 for (auto const& kv : actor_list_) {
751 XBT_DEBUG("Kill %s", kv.second->get_cname());
752 maestro_->kill(kv.second);
755 } while ((vetoed_activities == nullptr || vetoed_activities->empty()) &&
756 ((elapsed_time > -1.0 && not double_equals(max_date, now_, 0.00001)) || has_actors_to_run()));
758 if (not actor_list_.empty() && max_date < 0 && not(vetoed_activities == nullptr || vetoed_activities->empty()))
761 simgrid::s4u::Engine::on_simulation_end();
764 double EngineImpl::get_clock()
768 } // namespace kernel
769 } // namespace simgrid