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/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/simix/smx_private.hpp"
13 #include "src/surf/HostImpl.hpp"
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
19 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
23 template class Extendable<s4u::Host>;
28 xbt::signal<void(Host&)> Host::on_creation;
29 xbt::signal<void(Host const&)> Host::on_destruction;
30 xbt::signal<void(Host const&)> Host::on_state_change;
31 xbt::signal<void(Host const&)> Host::on_speed_change;
33 Host::Host(const std::string& name) : name_(name)
35 xbt_assert(Host::by_name_or_null(name_) == nullptr, "Refusing to create a second host named '%s'.", get_cname());
36 Engine::get_instance()->host_register(name_, this);
37 new surf::HostImpl(this);
42 xbt_assert(currently_destroying_, "Please call h->destroy() instead of manually deleting it.");
45 if (pimpl_netpoint != nullptr) // not removed yet by a children class
46 Engine::get_instance()->netpoint_unregister(pimpl_netpoint);
51 /** @brief Fire the required callbacks and destroy the object
53 * Don't delete directly a host, call h->destroy() instead.
55 * This is cumbersome but this is the simplest solution to ensure that the onDestruction() callback receives a valid
56 * object (because of the destructor order in a class hierarchy).
60 if (not currently_destroying_) {
61 currently_destroying_ = true;
62 on_destruction(*this);
63 Engine::get_instance()->host_unregister(std::string(name_));
68 Host* Host::by_name(const std::string& name)
70 return Engine::get_instance()->host_by_name(name);
72 Host* Host::by_name_or_null(const std::string& name)
74 return Engine::get_instance()->host_by_name_or_null(name);
79 kernel::actor::ActorImpl* self = SIMIX_process_self();
81 xbt_die("Cannot call Host::current() from the maestro context");
82 return self->get_host();
88 kernel::actor::simcall([this] {
89 this->pimpl_cpu->turn_on();
90 this->pimpl_->turn_on();
91 on_state_change(*this);
96 /** @brief Stop the host if it is on */
100 kernel::actor::simcall([this] {
101 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
102 if (vm->get_pm() == this) {
106 this->pimpl_cpu->turn_off();
107 this->pimpl_->turn_off();
109 on_state_change(*this);
114 bool Host::is_on() const
116 return this->pimpl_cpu->is_on();
119 int Host::get_pstate_count() const
121 return this->pimpl_cpu->get_pstate_count();
125 * @brief Return a copy of the list of actors that are executing on this host.
127 * Daemons and regular actors are all mixed in this list.
129 std::vector<ActorPtr> Host::get_all_actors()
131 return pimpl_->get_all_actors();
134 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
135 int Host::get_actor_count()
137 return pimpl_->get_actor_count();
141 * @brief Find a route toward another host
143 * @param dest [IN] where to
144 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
145 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
146 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
147 * @pre links!=nullptr
149 * walk through the routing components tree and find a route between hosts
150 * by calling each "get_route" function in each routing component.
152 void Host::route_to(Host* dest, std::vector<Link*>& links, double* latency)
154 std::vector<kernel::resource::LinkImpl*> linkImpls;
155 this->route_to(dest, linkImpls, latency);
156 for (kernel::resource::LinkImpl* const& l : linkImpls)
157 links.push_back(&l->piface_);
160 /** @brief Just like Host::routeTo, but filling an array of link implementations */
161 void Host::route_to(Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency)
163 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint, dest->pimpl_netpoint, links, latency);
164 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
165 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
166 (latency == nullptr ? -1 : *latency));
167 for (auto const& link : links)
168 XBT_CDEBUG(surf_route, "Link %s", link->get_cname());
172 /** @brief Returns the networking zone englobing that host */
173 NetZone* Host::get_englobing_zone()
175 return pimpl_netpoint->get_englobing_zone()->get_iface();
178 void Host::send_to(Host* dest, double byte_amount)
180 std::vector<Host*> m_host_list = {this, dest};
181 std::vector<double> flops_amount = {0, 0};
182 std::vector<double> bytes_amount = {0, byte_amount, 0, 0};
183 this_actor::parallel_execute(m_host_list, flops_amount, bytes_amount);
186 /** Get the properties assigned to a host */
187 const std::unordered_map<std::string, std::string>* Host::get_properties() const
189 return this->pimpl_->get_properties();
192 /** Retrieve the property value (or nullptr if not set) */
193 const char* Host::get_property(const std::string& key) const
195 return this->pimpl_->get_property(key);
198 void Host::set_property(const std::string& key, const std::string& value)
200 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
203 void Host::set_properties(const std::map<std::string, std::string>& properties)
205 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
208 /** Specify a profile turning the host on and off according to a exhaustive list or a stochastic law.
209 * The profile must contain boolean values. */
210 void Host::set_state_profile(kernel::profile::Profile* p)
212 return kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
214 /** Specify a profile modeling the external load according to a exhaustive list or a stochastic law.
216 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
217 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
218 * at this pstate level) by the rate coming from the profile.
220 void Host::set_speed_profile(kernel::profile::Profile* p)
222 return kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
225 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
226 double Host::get_pstate_speed(int pstate_index) const
228 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
231 /** @brief Get the peak computing speed in flops/s at the current pstate, NOT taking the external load into account.
233 * The amount of flops per second available for computing depends on several things:
234 * - The current pstate determines the maximal peak computing speed (use @ref get_pstate_speed() to retrieve the
235 * computing speed you would get at another pstate)
236 * - If you declared an external load (with @ref simgrid::surf::Cpu::set_speed_profile()), you must multiply the
237 * result of get_speed() by get_available_speed() to retrieve what a new computation would get.
239 * The remaining speed is then shared between the executions located on this host.
240 * You can retrieve the amount of tasks currently running on this host with @ref get_load().
242 * The host may have multiple cores, and your executions may be able to use more than a single core.
244 * Finally, executions of priority 2 get twice the amount of flops than executions of priority 1.
246 double Host::get_speed() const
248 return this->pimpl_cpu->get_speed(1.0);
250 /** @brief Returns the current computation load (in flops per second)
252 * The external load (coming from an availability trace) is not taken in account.
253 * You may also be interested in the load plugin.
255 double Host::get_load() const
257 return this->pimpl_cpu->get_load();
259 /** @brief Get the available speed ratio, between 0 and 1.
261 * This accounts for external load (see @ref simgrid::surf::Cpu::set_speed_profile()).
263 double Host::get_available_speed() const
265 return this->pimpl_cpu->get_speed_ratio();
268 /** @brief Returns the number of core of the processor. */
269 int Host::get_core_count() const
271 return this->pimpl_cpu->get_core_count();
274 /** @brief Set the pstate at which the host should run */
275 void Host::set_pstate(int pstate_index)
277 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
279 /** @brief Retrieve the pstate at which the host is currently running */
280 int Host::get_pstate() const
282 return this->pimpl_cpu->get_pstate();
286 * @ingroup simix_storage_management
287 * @brief Returns the list of storages attached to a host.
288 * @return a vector containing all storages attached to the host
290 std::vector<const char*> Host::get_attached_storages() const
292 return kernel::actor::simcall([this] { return this->pimpl_->get_attached_storages(); });
295 std::unordered_map<std::string, Storage*> const& Host::get_mounted_storages()
297 if (mounts_ == nullptr) {
298 mounts_ = new std::unordered_map<std::string, Storage*>();
299 for (auto const& m : this->pimpl_->storage_) {
300 mounts_->insert({m.first, &m.second->piface_});
306 ExecPtr Host::exec_async(double flops)
308 return this_actor::exec_init(flops);
311 void Host::execute(double flops)
313 execute(flops, 1.0 /* priority */);
316 void Host::execute(double flops, double priority)
318 this_actor::exec_init(flops)->set_priority(1 / priority)->start()->wait();
322 } // namespace simgrid
324 /* **************************** Public C interface *************************** */
325 size_t sg_host_count()
327 return simgrid::s4u::Engine::get_instance()->get_host_count();
329 /** @brief Returns the host list
331 * Uses sg_host_count() to know the array size.
333 * @return an array of @ref sg_host_t containing all the hosts in the platform.
334 * @remark The host order in this array is generally different from the
335 * creation/declaration order in the XML platform (we use a hash table
337 * @see sg_host_count()
339 sg_host_t* sg_host_list()
341 xbt_assert(sg_host_count() > 0, "There is no host!");
342 std::vector<simgrid::s4u::Host*> hosts = simgrid::s4u::Engine::get_instance()->get_all_hosts();
344 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
345 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
350 const char* sg_host_get_name(sg_host_t host)
352 return host->get_cname();
355 void* sg_host_extension_get(sg_host_t host, size_t ext)
357 return host->extension(ext);
360 size_t sg_host_extension_create(void (*deleter)(void*))
362 return simgrid::s4u::Host::extension_create(deleter);
365 sg_host_t sg_host_by_name(const char* name)
367 return simgrid::s4u::Host::by_name_or_null(name);
370 xbt_dynar_t sg_hosts_as_dynar()
372 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
374 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
375 return not host || not host->pimpl_netpoint || not host->pimpl_netpoint->is_host();
377 std::sort(begin(list), last,
378 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
380 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
381 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
385 // ========= Layering madness ==============*
387 // ========== User data Layer ==========
388 void* sg_host_data(sg_host_t host)
390 return host->get_data();
392 void sg_host_data_set(sg_host_t host, void* userdata)
394 host->set_data(userdata);
396 void* sg_host_user(sg_host_t host) // deprecated
398 return host->get_data();
400 void sg_host_user_set(sg_host_t host, void* userdata) // deprecated
402 host->set_data(userdata);
404 void sg_host_user_destroy(sg_host_t host) // deprecated
406 host->set_data(nullptr);
409 // ========= storage related functions ============
410 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host)
412 xbt_assert((host != nullptr), "Invalid parameters");
413 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
414 for (auto const& elm : host->get_mounted_storages()) {
415 const char* mount_name = elm.first.c_str();
416 sg_storage_t storage = elm.second;
417 xbt_dict_set(res, mount_name, (void*)storage->get_cname(), nullptr);
423 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host)
425 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
426 std::vector<const char*> storage_vector = host->get_attached_storages();
427 for (auto const& name : storage_vector)
428 xbt_dynar_push(storage_dynar, &name);
429 return storage_dynar;
432 // =========== user-level functions ===============
433 // ================================================
434 /** @brief Returns the total speed of a host */
435 double sg_host_speed(sg_host_t host)
437 return host->get_speed();
440 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
442 * @param host host to test
443 * @param pstate_index pstate to test
444 * @return Returns the processor speed associated with pstate_index
446 double sg_host_get_pstate_speed(sg_host_t host, int pstate_index)
448 return host->get_pstate_speed(pstate_index);
451 /** @ingroup m_host_management
452 * @brief Return the number of cores.
455 * @return the number of cores
457 int sg_host_core_count(sg_host_t host)
459 return host->get_core_count();
462 double sg_host_get_available_speed(sg_host_t host)
464 return host->get_available_speed();
467 /** @brief Returns the number of power states for a host.
469 * See also @ref plugin_energy.
471 int sg_host_get_nb_pstates(sg_host_t host)
473 return host->get_pstate_count();
476 /** @brief Gets the pstate at which that host currently runs.
478 * See also @ref plugin_energy.
480 int sg_host_get_pstate(sg_host_t host)
482 return host->get_pstate();
484 /** @brief Sets the pstate at which that host should run.
486 * See also @ref plugin_energy.
488 void sg_host_set_pstate(sg_host_t host, int pstate)
490 host->set_pstate(pstate);
493 /** @ingroup m_host_management
495 * @brief Start the host if it is off
497 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
498 * for more info on DVFS.
500 void sg_host_turn_on(sg_host_t host)
505 /** @ingroup m_host_management
507 * @brief Stop the host if it is on
509 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
510 * for more info on DVFS.
512 void sg_host_turn_off(sg_host_t host)
517 /** @ingroup m_host_management
518 * @brief Determine if a host is up and running.
520 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
523 * @param host host to test
524 * @return Returns true if the host is up and running, and false if it's currently down
526 int sg_host_is_on(sg_host_t host)
528 return host->is_on();
532 int sg_host_is_off(sg_host_t host)
534 return not host->is_on();
537 /** @brief Get the properties of a host */
538 xbt_dict_t sg_host_get_properties(sg_host_t host)
540 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
541 const std::unordered_map<std::string, std::string>* props = host->get_properties();
542 if (props == nullptr)
544 for (auto const& elm : *props) {
545 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()), nullptr);
550 /** @ingroup m_host_management
551 * @brief Returns the value of a given host property
554 * @param name a property name
555 * @return value of a property (or nullptr if property not set)
557 const char* sg_host_get_property_value(sg_host_t host, const char* name)
559 return host->get_property(name);
562 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
564 host->set_property(name, value);
568 * @brief Find a route between two hosts
570 * @param from where from
572 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
574 void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
576 std::vector<simgrid::s4u::Link*> vlinks;
577 from->route_to(to, vlinks, nullptr);
578 for (auto const& link : vlinks)
579 xbt_dynar_push(links, &link);
582 * @brief Find the latency of the route between two hosts
584 * @param from where from
587 double sg_host_route_latency(sg_host_t from, sg_host_t to)
589 std::vector<simgrid::s4u::Link*> vlinks;
591 from->route_to(to, vlinks, &res);
595 * @brief Find the bandwitdh of the route between two hosts
597 * @param from where from
600 double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
602 double min_bandwidth = -1.0;
604 std::vector<simgrid::s4u::Link*> vlinks;
605 from->route_to(to, vlinks, nullptr);
606 for (auto const& link : vlinks) {
607 double bandwidth = link->get_bandwidth();
608 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
609 min_bandwidth = bandwidth;
611 return min_bandwidth;
614 void sg_host_send_to(sg_host_t from, sg_host_t to, double byte_amount)
616 from->send_to(to, byte_amount);
619 /** @brief Displays debugging information about a host */
620 void sg_host_dump(sg_host_t host)
622 XBT_INFO("Displaying host %s", host->get_cname());
623 XBT_INFO(" - speed: %.0f", host->get_speed());
624 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
625 const std::unordered_map<std::string, std::string>* props = host->get_properties();
627 if (not props->empty()) {
628 XBT_INFO(" - properties:");
629 for (auto const& elm : *props) {
630 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
635 /** @brief Return the list of actors attached to a host.
638 * @param whereto a dynar in which we should push actors living on that host
640 void sg_host_get_actor_list(sg_host_t host, xbt_dynar_t whereto)
642 auto actors = host->get_all_actors();
643 for (auto& actor : actors)
644 xbt_dynar_push(whereto, &actor);
647 sg_host_t sg_host_self()
649 smx_actor_t process = SIMIX_process_self();
650 return (process == nullptr) ? nullptr : process->get_host();
653 /* needs to be public and without simcall for exceptions and logging events */
654 const char* sg_host_self_get_name()
656 sg_host_t host = sg_host_self();
657 if (host == nullptr || SIMIX_process_self() == simix_global->maestro_process)
660 return host->get_cname();
663 double sg_host_load(sg_host_t host)
665 return host->get_load();