1 /* Copyright (c) 2006-2019. 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/actor.h"
8 #include "simgrid/s4u/Actor.hpp"
9 #include "simgrid/s4u/Exec.hpp"
10 #include "simgrid/s4u/Host.hpp"
11 #include "simgrid/s4u/VirtualMachine.hpp"
12 #include "src/kernel/activity/ExecImpl.hpp"
13 #include "src/simix/smx_private.hpp"
14 #include "src/surf/HostImpl.hpp"
19 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_actor, "S4U actors");
24 xbt::signal<void(Actor&)> s4u::Actor::on_creation;
25 xbt::signal<void(Actor const&)> s4u::Actor::on_suspend;
26 xbt::signal<void(Actor const&)> s4u::Actor::on_resume;
27 xbt::signal<void(Actor const&)> s4u::Actor::on_sleep;
28 xbt::signal<void(Actor const&)> s4u::Actor::on_wake_up;
29 xbt::signal<void(Actor const&)> s4u::Actor::on_migration_start;
30 xbt::signal<void(Actor const&)> s4u::Actor::on_migration_end;
31 xbt::signal<void(Actor const&)> s4u::Actor::on_destruction;
33 // ***** Actor creation *****
36 kernel::context::Context* self_context = kernel::context::Context::self();
37 if (self_context == nullptr)
40 return self_context->get_actor()->ciface();
42 ActorPtr Actor::init(const std::string& name, s4u::Host* host)
44 smx_actor_t self = SIMIX_process_self();
45 kernel::actor::ActorImpl* actor = simix::simcall([self, &name, host] { return self->init(name, host).get(); });
46 return actor->iface();
49 ActorPtr Actor::start(const std::function<void()>& code)
51 simgrid::simix::simcall([this, &code] { pimpl_->start(code); });
55 ActorPtr Actor::create(const std::string& name, s4u::Host* host, const std::function<void()>& code)
57 smx_actor_t self = SIMIX_process_self();
58 kernel::actor::ActorImpl* actor =
59 simix::simcall([self, &name, host, &code] { return self->init(name, host)->start(code); });
61 return actor->iface();
64 ActorPtr Actor::create(const std::string& name, s4u::Host* host, const std::string& function,
65 std::vector<std::string> args)
67 simix::ActorCodeFactory& factory = SIMIX_get_actor_code_factory(function);
68 return create(name, host, factory(std::move(args)));
71 void intrusive_ptr_add_ref(Actor* actor)
73 intrusive_ptr_add_ref(actor->pimpl_);
75 void intrusive_ptr_release(Actor* actor)
77 intrusive_ptr_release(actor->pimpl_);
80 // ***** Actor methods *****
84 simcall_process_join(this->pimpl_, -1);
87 void Actor::join(double timeout)
89 simcall_process_join(this->pimpl_, timeout);
92 void Actor::set_auto_restart(bool autorestart)
94 simix::simcall([this, autorestart]() {
95 xbt_assert(autorestart && not pimpl_->has_to_auto_restart()); // FIXME: handle all cases
96 pimpl_->set_auto_restart(autorestart);
98 kernel::actor::ProcessArg* arg = new kernel::actor::ProcessArg(pimpl_->get_host(), pimpl_);
99 XBT_DEBUG("Adding Process %s to the actors_at_boot_ list of Host %s", arg->name.c_str(), arg->host->get_cname());
100 pimpl_->get_host()->pimpl_->actors_at_boot_.emplace_back(arg);
104 void Actor::on_exit(const std::function<void(int, void*)>& fun, void* data) /* deprecated */
106 on_exit([fun, data](bool failed) { fun(failed ? SMX_EXIT_FAILURE : SMX_EXIT_SUCCESS, data); });
109 void Actor::on_exit(const std::function<void(bool /*failed*/)>& fun) const
111 simix::simcall([this, &fun] { SIMIX_process_on_exit(pimpl_, fun); });
114 void Actor::migrate(Host* new_host)
116 s4u::Actor::on_migration_start(*this);
118 simix::simcall([this, new_host]() {
119 if (pimpl_->waiting_synchro != nullptr) {
120 // The actor is blocked on an activity. If it's an exec, migrate it too.
121 // FIXME: implement the migration of other kind of activities
122 kernel::activity::ExecImplPtr exec =
123 boost::dynamic_pointer_cast<kernel::activity::ExecImpl>(pimpl_->waiting_synchro);
124 xbt_assert(exec.get() != nullptr, "We can only migrate blocked actors when they are blocked on executions.");
125 exec->migrate(new_host);
127 this->pimpl_->set_host(new_host);
130 s4u::Actor::on_migration_end(*this);
133 s4u::Host* Actor::get_host() const
135 return this->pimpl_->get_host();
138 void Actor::daemonize()
140 simix::simcall([this]() { pimpl_->daemonize(); });
143 bool Actor::is_daemon() const
145 return this->pimpl_->is_daemon();
148 const simgrid::xbt::string& Actor::get_name() const
150 return this->pimpl_->get_name();
153 const char* Actor::get_cname() const
155 return this->pimpl_->get_cname();
158 aid_t Actor::get_pid() const
160 return this->pimpl_->get_pid();
163 aid_t Actor::get_ppid() const
165 return this->pimpl_->get_ppid();
168 void Actor::suspend()
170 s4u::Actor::on_suspend(*this);
171 simcall_process_suspend(pimpl_);
176 simix::simcall([this] { pimpl_->resume(); });
177 s4u::Actor::on_resume(*this);
180 bool Actor::is_suspended()
182 return simix::simcall([this] { return pimpl_->is_suspended(); });
185 void Actor::set_kill_time(double kill_time)
187 simix::simcall([this, kill_time] { pimpl_->set_kill_time(kill_time); });
190 /** @brief Get the kill time of an actor(or 0 if unset). */
191 double Actor::get_kill_time()
193 return pimpl_->get_kill_time();
196 void Actor::kill(aid_t pid) // deprecated
198 kernel::actor::ActorImpl* killer = SIMIX_process_self();
199 kernel::actor::ActorImpl* victim = SIMIX_process_from_PID(pid);
200 if (victim != nullptr) {
201 simix::simcall([killer, victim] { killer->kill(victim); });
203 std::ostringstream oss;
204 oss << "kill: (" << pid << ") - No such actor" << std::endl;
205 throw std::runtime_error(oss.str());
211 kernel::actor::ActorImpl* process = SIMIX_process_self();
212 simix::simcall([this, process] {
213 xbt_assert(pimpl_ != simix_global->maestro_process, "Killing maestro is a rather bad idea");
214 process->kill(pimpl_);
218 // ***** Static functions *****
220 ActorPtr Actor::by_pid(aid_t pid)
222 kernel::actor::ActorImpl* process = SIMIX_process_from_PID(pid);
223 if (process != nullptr)
224 return process->iface();
229 void Actor::kill_all()
231 kernel::actor::ActorImpl* self = SIMIX_process_self();
232 simix::simcall([self] { self->kill_all(); });
235 const std::unordered_map<std::string, std::string>* Actor::get_properties() const
237 return pimpl_->get_properties();
240 /** Retrieve the property value (or nullptr if not set) */
241 const char* Actor::get_property(const std::string& key) const
243 return pimpl_->get_property(key);
246 void Actor::set_property(const std::string& key, const std::string& value)
248 simix::simcall([this, &key, &value] { pimpl_->set_property(key, value); });
251 Actor* Actor::restart()
253 return simix::simcall([this]() { return pimpl_->restart(); });
256 // ***** this_actor *****
258 namespace this_actor {
260 /** Returns true if run from the kernel mode, and false if run from a real actor
262 * Everything that is run out of any actor (simulation setup before the engine is run,
263 * computing the model evolutions as a result to the actors' action, etc) is run in
264 * kernel mode, just as in any operating systems.
266 * In SimGrid, the actor in charge of doing the stuff in kernel mode is called Maestro,
267 * because it is the one scheduling when the others should move or wait.
271 kernel::actor::ActorImpl* process = SIMIX_process_self();
272 return process == nullptr || process == simix_global->maestro_process;
275 void sleep_for(double duration)
278 kernel::actor::ActorImpl* actor = SIMIX_process_self();
279 Actor::on_sleep(*actor->ciface());
281 simcall_process_sleep(duration);
283 Actor::on_wake_up(*actor->ciface());
289 simix::simcall([] { /* do nothing*/ });
292 XBT_PUBLIC void sleep_until(double timeout)
294 double now = SIMIX_get_clock();
296 sleep_for(timeout - now);
299 void execute(double flops)
301 execute(flops, 1.0 /* priority */);
304 void execute(double flops, double priority)
306 exec_init(flops)->set_priority(priority)->start()->wait();
309 void parallel_execute(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
310 const std::vector<double>& bytes_amounts)
312 parallel_execute(hosts, flops_amounts, bytes_amounts, -1);
315 void parallel_execute(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
316 const std::vector<double>& bytes_amounts, double timeout)
318 xbt_assert(hosts.size() > 0, "Your parallel executions must span over at least one host.");
319 xbt_assert(hosts.size() == flops_amounts.size() || flops_amounts.empty(),
320 "Host count (%zu) does not match flops_amount count (%zu).", hosts.size(), flops_amounts.size());
321 xbt_assert(hosts.size() * hosts.size() == bytes_amounts.size() || bytes_amounts.empty(),
322 "bytes_amounts must be a matrix of size host_count * host_count (%zu*%zu), but it's of size %zu.",
323 hosts.size(), hosts.size(), flops_amounts.size());
324 /* Check that we are not mixing VMs and PMs in the parallel task */
325 bool is_a_vm = (nullptr != dynamic_cast<VirtualMachine*>(hosts.front()));
326 xbt_assert(std::all_of(hosts.begin(), hosts.end(),
327 [is_a_vm](s4u::Host* elm) {
328 bool tmp_is_a_vm = (nullptr != dynamic_cast<VirtualMachine*>(elm));
329 return is_a_vm == tmp_is_a_vm;
331 "parallel_execute: mixing VMs and PMs is not supported (yet).");
332 /* checking for infinite values */
333 xbt_assert(std::all_of(flops_amounts.begin(), flops_amounts.end(), [](double elm) { return std::isfinite(elm); }),
334 "flops_amounts comprises infinite values!");
335 xbt_assert(std::all_of(bytes_amounts.begin(), bytes_amounts.end(), [](double elm) { return std::isfinite(elm); }),
336 "flops_amounts comprises infinite values!");
338 exec_init(hosts, flops_amounts, bytes_amounts)->set_timeout(timeout)->wait();
342 void parallel_execute(int host_nb, s4u::Host* const* host_list, const double* flops_amount, const double* bytes_amount,
346 simcall_execution_parallel_start("", host_nb, host_list, flops_amount, bytes_amount, /* rate */ -1, timeout);
347 simcall_execution_wait(s);
348 delete[] flops_amount;
349 delete[] bytes_amount;
353 void parallel_execute(int host_nb, s4u::Host* const* host_list, const double* flops_amount, const double* bytes_amount)
355 smx_activity_t s = simcall_execution_parallel_start("", host_nb, host_list, flops_amount, bytes_amount,
356 /* rate */ -1, /*timeout*/ -1);
357 simcall_execution_wait(s);
358 delete[] flops_amount;
359 delete[] bytes_amount;
362 ExecPtr exec_init(double flops_amount)
364 return ExecPtr(new ExecSeq(get_host(), flops_amount));
367 ExecPtr exec_init(const std::vector<s4u::Host*>& hosts, const std::vector<double>& flops_amounts,
368 const std::vector<double>& bytes_amounts)
370 return ExecPtr(new ExecPar(hosts, flops_amounts, bytes_amounts));
373 ExecPtr exec_async(double flops)
375 ExecPtr res = exec_init(flops);
382 return SIMIX_process_self()->get_pid();
387 return SIMIX_process_self()->get_ppid();
390 std::string get_name()
392 return SIMIX_process_self()->get_name();
395 const char* get_cname()
397 return SIMIX_process_self()->get_cname();
402 return SIMIX_process_self()->get_host();
407 kernel::actor::ActorImpl* actor = SIMIX_process_self();
408 Actor::on_suspend(*actor->ciface());
410 simcall_process_suspend(actor);
415 kernel::actor::ActorImpl* self = SIMIX_process_self();
416 simix::simcall([self] { self->resume(); });
417 Actor::on_resume(*self->ciface());
422 kernel::actor::ActorImpl* self = SIMIX_process_self();
423 simgrid::simix::simcall([self] { self->exit(); });
426 void on_exit(const std::function<void(bool)>& fun)
428 SIMIX_process_self()->iface()->on_exit(fun);
431 void on_exit(const std::function<void(int, void*)>& fun, void* data) /* deprecated */
433 SIMIX_process_self()->iface()->on_exit([fun, data](bool exit) { fun(exit, data); });
436 /** @brief Moves the current actor to another host
438 * @see simgrid::s4u::Actor::migrate() for more information
440 void migrate(Host* new_host)
442 SIMIX_process_self()->iface()->migrate(new_host);
445 void kill() /* deprecated */
450 } // namespace this_actor
452 } // namespace simgrid
454 /* **************************** Public C interface *************************** */
456 /** @ingroup m_actor_management
457 * @brief Returns the process ID of @a actor.
459 * This function checks whether @a actor is a valid pointer and return its PID (or 0 in case of problem).
461 aid_t sg_actor_get_PID(sg_actor_t actor)
463 /* Do not raise an exception here: this function is called by the logs
464 * and the exceptions, so it would be called back again and again */
465 if (actor == nullptr || actor->get_impl() == nullptr)
467 return actor->get_pid();
470 /** @ingroup m_actor_management
471 * @brief Returns the process ID of the parent of @a actor.
473 * This function checks whether @a actor is a valid pointer and return its parent's PID.
474 * Returns -1 if the actor has not been created by any other actor.
476 aid_t sg_actor_get_PPID(sg_actor_t actor)
478 return actor->get_ppid();
481 /** @ingroup m_actor_management
483 * @brief Return a #sg_actor_t given its PID.
485 * This function search in the list of all the created sg_actor_t for a sg_actor_t whose PID is equal to @a PID.
486 * If none is found, @c nullptr is returned.
487 Note that the PID are unique in the whole simulation, not only on a given host.
489 sg_actor_t sg_actor_by_PID(aid_t pid)
491 return simgrid::s4u::Actor::by_pid(pid).get();
494 /** @ingroup m_actor_management
495 * @brief Return the name of an actor.
497 const char* sg_actor_get_name(sg_actor_t actor)
499 return actor->get_cname();
502 sg_host_t sg_actor_get_host(sg_actor_t actor)
504 return actor->get_host();
507 /** @ingroup m_actor_management
508 * @brief Returns the value of a given actor property
510 * @param actor an actor
511 * @param name a property name
512 * @return value of a property (or nullptr if the property is not set)
514 const char* sg_actor_get_property_value(sg_actor_t actor, const char* name)
516 return actor->get_property(name);
519 /** @ingroup m_actor_management
520 * @brief Return the list of properties
522 * This function returns all the parameters associated with an actor
524 xbt_dict_t sg_actor_get_properties(sg_actor_t actor)
526 xbt_assert(actor != nullptr, "Invalid parameter: First argument must not be nullptr");
527 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
528 const std::unordered_map<std::string, std::string>* props = actor->get_properties();
529 if (props == nullptr)
531 for (auto const& kv : *props) {
532 xbt_dict_set(as_dict, kv.first.c_str(), xbt_strdup(kv.second.c_str()), nullptr);
537 /** @ingroup m_actor_management
538 * @brief Suspend the actor.
540 * This function suspends the actor by suspending the task on which it was waiting for the completion.
542 void sg_actor_suspend(sg_actor_t actor)
544 xbt_assert(actor != nullptr, "Invalid parameter: First argument must not be nullptr");
548 /** @ingroup m_actor_management
549 * @brief Resume a suspended actor.
551 * This function resumes a suspended actor by resuming the task on which it was waiting for the completion.
553 void sg_actor_resume(sg_actor_t actor)
555 xbt_assert(actor != nullptr, "Invalid parameter: First argument must not be nullptr");
559 /** @ingroup m_actor_management
560 * @brief Returns true if the actor is suspended .
562 * This checks whether an actor is suspended or not by inspecting the task on which it was waiting for the completion.
564 int sg_actor_is_suspended(sg_actor_t actor)
566 return actor->is_suspended();
570 * @ingroup m_actor_management
571 * @brief Restarts an actor from the beginning.
573 sg_actor_t sg_actor_restart(sg_actor_t actor)
575 return actor->restart();
579 * @ingroup m_actor_management
580 * @brief Sets the "auto-restart" flag of the actor.
581 * If the flag is set to 1, the actor will be automatically restarted when its host comes back up.
583 void sg_actor_set_auto_restart(sg_actor_t actor, int auto_restart)
585 actor->set_auto_restart(auto_restart);
588 /** @ingroup m_actor_management
589 * @brief This actor will be terminated automatically when the last non-daemon actor finishes
591 void sg_actor_daemonize(sg_actor_t actor)
596 /** @ingroup m_actor_management
597 * @brief Migrates an actor to another location.
599 * This function changes the value of the #sg_host_t on which @a actor is running.
601 void sg_actor_migrate(sg_actor_t process, sg_host_t host)
603 process->migrate(host);
606 /** @ingroup m_actor_management
607 * @brief Wait for the completion of a #sg_actor_t.
609 * @param actor the actor to wait for
610 * @param timeout wait until the actor is over, or the timeout expires
612 void sg_actor_join(sg_actor_t actor, double timeout)
614 actor->join(timeout);
617 void sg_actor_kill(sg_actor_t actor)
622 void sg_actor_kill_all()
624 simgrid::s4u::Actor::kill_all();
627 /** @ingroup m_actor_management
628 * @brief Set the kill time of an actor.
630 * @param actor an actor
631 * @param kill_time the time when the actor is killed.
633 void sg_actor_set_kill_time(sg_actor_t actor, double kill_time)
635 actor->set_kill_time(kill_time);
638 /** Yield the current actor; let the other actors execute first */
639 void sg_actor_yield()
641 simgrid::s4u::this_actor::yield();
644 void sg_actor_sleep_for(double duration)
646 simgrid::s4u::this_actor::sleep_for(duration);
649 sg_actor_t sg_actor_attach(const char* name, void* data, sg_host_t host, xbt_dict_t properties)
651 xbt_assert(host != nullptr, "Invalid parameters: host and code params must not be nullptr");
652 std::unordered_map<std::string, std::string> props;
653 xbt_dict_cursor_t cursor = nullptr;
656 xbt_dict_foreach (properties, cursor, key, value)
658 xbt_dict_free(&properties);
660 /* Let's create the process: SIMIX may decide to start it right now, even before returning the flow control to us */
661 smx_actor_t actor = nullptr;
663 actor = simgrid::kernel::actor::ActorImpl::attach(name, data, host, &props).get();
664 } catch (simgrid::HostFailureException const&) {
665 xbt_die("Could not attach");
668 simgrid::s4u::this_actor::yield();
669 return actor->ciface();
672 void sg_actor_detach()
674 simgrid::kernel::actor::ActorImpl::detach();