1 /* Copyright (c) 2006-2020. 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/kernel/routing/NetPoint.hpp"
7 #include "simgrid/s4u/Actor.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "simgrid/s4u/Exec.hpp"
10 #include "simgrid/s4u/VirtualMachine.hpp"
11 #include "src/plugins/vm/VirtualMachineImpl.hpp"
12 #include "src/surf/HostImpl.hpp"
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
18 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
22 template class xbt::Extendable<s4u::Host>;
26 xbt::signal<void(Host&)> Host::on_creation;
27 xbt::signal<void(Host const&)> Host::on_destruction;
28 xbt::signal<void(Host const&)> Host::on_state_change;
29 xbt::signal<void(Host const&)> Host::on_speed_change;
31 Host::Host(const std::string& name) : name_(name)
33 xbt_assert(Host::by_name_or_null(name_) == nullptr, "Refusing to create a second host named '%s'.", get_cname());
34 Engine::get_instance()->host_register(name_, this);
35 new surf::HostImpl(this);
40 xbt_assert(currently_destroying_, "Please call h->destroy() instead of manually deleting it.");
43 if (pimpl_netpoint_ != nullptr) // not removed yet by a children class
44 Engine::get_instance()->netpoint_unregister(pimpl_netpoint_);
49 /** @brief Fire the required callbacks and destroy the object
51 * Don't delete directly a host, call h->destroy() instead.
53 * This is cumbersome but this is the simplest solution to ensure that the on_destruction() callback receives a valid
54 * object (because of the destructor order in a class hierarchy).
58 if (not currently_destroying_) {
59 currently_destroying_ = true;
60 on_destruction(*this);
61 Engine::get_instance()->host_unregister(std::string(name_));
66 Host* Host::by_name(const std::string& name)
68 return Engine::get_instance()->host_by_name(name);
70 Host* Host::by_name_or_null(const std::string& name)
72 return Engine::get_instance()->host_by_name_or_null(name);
77 kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
79 xbt_die("Cannot call Host::current() from the maestro context");
80 return self->get_host();
86 kernel::actor::simcall([this] {
87 this->pimpl_cpu->turn_on();
88 this->pimpl_->turn_on();
89 on_state_change(*this);
94 /** @brief Stop the host if it is on */
98 kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
99 kernel::actor::simcall([this, self] {
100 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
101 if (vm->get_pm() == this) {
105 this->pimpl_cpu->turn_off();
106 this->pimpl_->turn_off(self);
108 on_state_change(*this);
113 bool Host::is_on() const
115 return this->pimpl_cpu->is_on();
118 int Host::get_pstate_count() const
120 return this->pimpl_cpu->get_pstate_count();
124 * @brief Return a copy of the list of actors that are executing on this host.
126 * Daemons and regular actors are all mixed in this list.
128 std::vector<ActorPtr> Host::get_all_actors() const
130 return pimpl_->get_all_actors();
133 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
134 int Host::get_actor_count() const
136 return pimpl_->get_actor_count();
140 * @brief Find a route toward another host
142 * @param dest [IN] where to
143 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
144 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
145 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
146 * @pre links!=nullptr
148 * walk through the routing components tree and find a route between hosts
149 * by calling each "get_route" function in each routing component.
151 void Host::route_to(const Host* dest, std::vector<Link*>& links, double* latency) const
153 std::vector<kernel::resource::LinkImpl*> linkImpls;
154 this->route_to(dest, linkImpls, latency);
155 for (kernel::resource::LinkImpl* const& l : linkImpls)
156 links.push_back(l->get_iface());
159 /** @brief Just like Host::routeTo, but filling an array of link implementations */
160 void Host::route_to(const Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency) const
162 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint_, dest->get_netpoint(), links, latency);
163 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
164 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
165 (latency == nullptr ? -1 : *latency));
166 for (auto const& link : links)
167 XBT_CDEBUG(surf_route, "Link %s", link->get_cname());
171 /** @brief Returns the networking zone englobing that host */
172 NetZone* Host::get_englobing_zone()
174 return pimpl_netpoint_->get_englobing_zone()->get_iface();
177 void Host::sendto(Host* dest, double byte_amount)
179 sendto_async(dest, byte_amount)->wait();
182 ActivityPtr Host::sendto_async(Host* dest, double byte_amount)
184 std::vector<Host*> m_host_list = {this, dest};
185 std::vector<double> flops_amount = {0, 0};
186 std::vector<double> bytes_amount = {0, byte_amount, 0, 0};
187 return this_actor::exec_init(m_host_list, flops_amount, bytes_amount)->start();
190 /** Get the properties assigned to a host */
191 const std::unordered_map<std::string, std::string>* Host::get_properties() const
193 return this->pimpl_->get_properties();
196 /** Retrieve the property value (or nullptr if not set) */
197 const char* Host::get_property(const std::string& key) const
199 return this->pimpl_->get_property(key);
202 void Host::set_property(const std::string& key, const std::string& value)
204 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
207 void Host::set_properties(const std::map<std::string, std::string>& properties)
209 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
212 /** Specify a profile turning the host on and off according to a exhaustive list or a stochastic law.
213 * The profile must contain boolean values. */
214 void Host::set_state_profile(kernel::profile::Profile* p)
216 return kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
218 /** Specify a profile modeling the external load according to a exhaustive list or a stochastic law.
220 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
221 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
222 * at this pstate level) by the rate coming from the profile.
224 void Host::set_speed_profile(kernel::profile::Profile* p)
226 return kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
229 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
230 double Host::get_pstate_speed(int pstate_index) const
232 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
235 double Host::get_speed() const
237 return this->pimpl_cpu->get_speed(1.0);
239 double Host::get_load() const
241 return this->pimpl_cpu->get_load();
243 double Host::get_available_speed() const
245 return this->pimpl_cpu->get_speed_ratio();
248 int Host::get_core_count() const
250 return this->pimpl_cpu->get_core_count();
253 /** @brief Set the pstate at which the host should run */
254 void Host::set_pstate(int pstate_index)
256 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
258 /** @brief Retrieve the pstate at which the host is currently running */
259 int Host::get_pstate() const
261 return this->pimpl_cpu->get_pstate();
264 std::vector<Disk*> Host::get_disks() const
266 return kernel::actor::simcall([this] { return this->pimpl_->get_disks(); });
269 void Host::add_disk(Disk* disk)
271 kernel::actor::simcall([this, disk] { this->pimpl_->add_disk(disk); });
274 void Host::remove_disk(const std::string& disk_name)
276 kernel::actor::simcall([this, disk_name] { this->pimpl_->remove_disk(disk_name); });
279 * @ingroup simix_storage_management
280 * @brief Returns the list of storages attached to a host.
281 * @return a vector containing all storages attached to the host
283 std::vector<const char*> Host::get_attached_storages() const
285 return kernel::actor::simcall([this] { return this->pimpl_->get_attached_storages(); });
288 std::unordered_map<std::string, Storage*> const& Host::get_mounted_storages()
290 kernel::actor::simcall([this] {
291 if (mounts_ == nullptr)
292 mounts_ = pimpl_->get_mounted_storages();
297 ExecPtr Host::exec_async(double flops)
299 return this_actor::exec_init(flops);
302 void Host::execute(double flops)
304 execute(flops, 1.0 /* priority */);
307 void Host::execute(double flops, double priority)
309 this_actor::exec_init(flops)->set_priority(1 / priority)->start()->wait();
313 } // namespace simgrid
315 /* **************************** Public C interface *************************** */
316 size_t sg_host_count()
318 return simgrid::s4u::Engine::get_instance()->get_host_count();
320 sg_host_t* sg_host_list()
322 simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
323 size_t host_count = e->get_host_count();
324 xbt_assert(host_count > 0, "There is no host!");
325 std::vector<simgrid::s4u::Host*> hosts = e->get_all_hosts();
327 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
328 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
333 const char* sg_host_get_name(const_sg_host_t host)
335 return host->get_cname();
338 void* sg_host_extension_get(const_sg_host_t host, size_t ext)
340 return host->extension(ext);
343 size_t sg_host_extension_create(void (*deleter)(void*))
345 return simgrid::s4u::Host::extension_create(deleter);
348 sg_host_t sg_host_by_name(const char* name)
350 return simgrid::s4u::Host::by_name_or_null(name);
353 xbt_dynar_t sg_hosts_as_dynar() // XBT_ATTRIB_DEPRECATED_v330
355 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
357 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
358 return not host || not host->get_netpoint() || not host->get_netpoint()->is_host();
360 std::sort(begin(list), last,
361 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
363 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
364 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
368 // ========= Layering madness ==============*
370 // ========== User data Layer ==========
371 void* sg_host_data(const_sg_host_t host)
373 return host->get_data();
375 void sg_host_data_set(sg_host_t host, void* userdata)
377 host->set_data(userdata);
379 void* sg_host_user(sg_host_t host) // deprecated
381 return host->get_data();
383 void sg_host_user_set(sg_host_t host, void* userdata) // deprecated
385 host->set_data(userdata);
387 void sg_host_user_destroy(sg_host_t host) // deprecated
389 host->set_data(nullptr);
392 // ========= storage related functions ============
393 void sg_host_disks(const_sg_host_t host, unsigned int* disk_count, sg_disk_t** disks)
395 std::vector<sg_disk_t> list = host->get_disks();
396 *disk_count = list.size();
397 *disks = static_cast<sg_disk_t*>(xbt_malloc(sizeof(sg_disk_t) * (*disk_count)));
398 for (size_t i = 0; i < *disk_count; i++)
399 (*disks)[i] = list[i];
402 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
404 xbt_assert((host != nullptr), "Invalid parameters");
405 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
406 for (auto const& elm : host->get_mounted_storages()) {
407 const char* mount_name = elm.first.c_str();
408 const simgrid::s4u::Storage* storage = elm.second;
409 xbt_dict_set(res, mount_name, (void*)storage->get_cname());
415 xbt_dynar_t sg_host_get_attached_storage_list(const_sg_host_t host)
417 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
418 std::vector<const char*> storage_vector = host->get_attached_storages();
419 for (auto const& name : storage_vector)
420 xbt_dynar_push(storage_dynar, &name);
421 return storage_dynar;
424 // =========== user-level functions ===============
425 // ================================================
426 /** @brief Returns the total speed of a host */
427 double sg_host_speed(const_sg_host_t host)
429 return host->get_speed();
432 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
434 * @param host host to test
435 * @param pstate_index pstate to test
436 * @return Returns the processor speed associated with pstate_index
438 double sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
440 return host->get_pstate_speed(pstate_index);
443 /** @ingroup m_host_management
444 * @brief Return the number of cores.
447 * @return the number of cores
449 int sg_host_core_count(const_sg_host_t host)
451 return host->get_core_count();
454 double sg_host_get_available_speed(const_sg_host_t host)
456 return host->get_available_speed();
459 /** @brief Returns the number of power states for a host.
461 * See also @ref plugin_energy.
463 int sg_host_get_nb_pstates(const_sg_host_t host)
465 return host->get_pstate_count();
468 /** @brief Gets the pstate at which that host currently runs.
470 * See also @ref plugin_energy.
472 int sg_host_get_pstate(const_sg_host_t host)
474 return host->get_pstate();
476 /** @brief Sets the pstate at which that host should run.
478 * See also @ref plugin_energy.
480 void sg_host_set_pstate(sg_host_t host, int pstate)
482 host->set_pstate(pstate);
485 /** @ingroup m_host_management
487 * @brief Start the host if it is off
489 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
490 * for more info on DVFS.
492 void sg_host_turn_on(sg_host_t host)
497 /** @ingroup m_host_management
499 * @brief Stop the host if it is on
501 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
502 * for more info on DVFS.
504 void sg_host_turn_off(sg_host_t host)
509 /** @ingroup m_host_management
510 * @brief Determine if a host is up and running.
512 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
515 * @param host host to test
516 * @return Returns true if the host is up and running, and false if it's currently down
518 int sg_host_is_on(const_sg_host_t host)
520 return host->is_on();
523 /** @brief Get the properties of a host */
524 xbt_dict_t sg_host_get_properties(const_sg_host_t host)
526 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
527 const std::unordered_map<std::string, std::string>* props = host->get_properties();
528 if (props == nullptr)
530 for (auto const& elm : *props) {
531 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()));
536 /** @ingroup m_host_management
537 * @brief Returns the value of a given host property
540 * @param name a property name
541 * @return value of a property (or nullptr if property not set)
543 const char* sg_host_get_property_value(const_sg_host_t host, const char* name)
545 return host->get_property(name);
548 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
550 host->set_property(name, value);
554 * @brief Find a route between two hosts
556 * @param from where from
558 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
560 void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
562 std::vector<simgrid::s4u::Link*> vlinks;
563 from->route_to(to, vlinks, nullptr);
564 for (auto const& link : vlinks)
565 xbt_dynar_push(links, &link);
568 * @brief Find the latency of the route between two hosts
570 * @param from where from
573 double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to)
575 std::vector<simgrid::s4u::Link*> vlinks;
577 from->route_to(to, vlinks, &res);
581 * @brief Find the bandwidth of the route between two hosts
583 * @param from where from
586 double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
588 double min_bandwidth = -1.0;
590 std::vector<simgrid::s4u::Link*> vlinks;
591 from->route_to(to, vlinks, nullptr);
592 for (auto const& link : vlinks) {
593 double bandwidth = link->get_bandwidth();
594 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
595 min_bandwidth = bandwidth;
597 return min_bandwidth;
600 void sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
602 from->sendto(to, byte_amount);
605 /** @brief Displays debugging information about a host */
606 void sg_host_dump(const_sg_host_t host)
608 XBT_INFO("Displaying host %s", host->get_cname());
609 XBT_INFO(" - speed: %.0f", host->get_speed());
610 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
611 const std::unordered_map<std::string, std::string>* props = host->get_properties();
613 if (not props->empty()) {
614 XBT_INFO(" - properties:");
615 for (auto const& elm : *props) {
616 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
621 /** @brief Return the list of actors attached to a host.
624 * @param whereto a dynar in which we should push actors living on that host
626 void sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
628 auto const actors = host->get_all_actors();
629 for (auto const& actor : actors)
630 xbt_dynar_push(whereto, &actor);
633 sg_host_t sg_host_self()
635 return SIMIX_is_maestro() ? nullptr : simgrid::kernel::actor::ActorImpl::self()->get_host();
638 /* needs to be public and without simcall for exceptions and logging events */
639 const char* sg_host_self_get_name()
641 const char* res = "";
642 if (not SIMIX_is_maestro()) {
643 const simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
645 res = host->get_cname();
650 double sg_host_load(const_sg_host_t host)
652 return host->get_load();