1 /* Copyright (c) 2006-2018. 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/Engine.hpp"
8 #include "src/simix/smx_host_private.hpp"
9 #include "src/surf/HostImpl.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
14 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
16 int USER_HOST_LEVEL = -1;
21 template class Extendable<simgrid::s4u::Host>;
26 simgrid::xbt::signal<void(Host&)> Host::on_creation;
27 simgrid::xbt::signal<void(Host&)> Host::on_destruction;
28 simgrid::xbt::signal<void(Host&)> Host::on_state_change;
29 simgrid::xbt::signal<void(Host&)> Host::on_speed_change;
31 Host::Host(const char* name) : name_(name)
33 xbt_assert(Host::by_name_or_null(name) == nullptr, "Refusing to create a second host named '%s'.", name);
34 Engine::get_instance()->host_register(std::string(name_), this);
35 new simgrid::surf::HostImpl(this);
40 xbt_assert(currentlyDestroying_, "Please call h->destroy() instead of manually deleting it.");
43 if (pimpl_netpoint != nullptr) // not removed yet by a children class
44 simgrid::s4u::Engine::get_instance()->netpoint_unregister(pimpl_netpoint);
49 /** @brief Fire the required callbacks and destroy the object
51 * Don't delete directly an Host, call h->destroy() instead.
53 * This is cumbersome but this is the simplest solution to ensure that the
54 * onDestruction() callback receives a valid object (because of the destructor
55 * order in a class hierarchy).
59 if (not currentlyDestroying_) {
60 currentlyDestroying_ = true;
61 on_destruction(*this);
62 Engine::get_instance()->host_unregister(std::string(name_));
67 Host* Host::by_name(std::string name)
69 return Engine::get_instance()->host_by_name(name);
71 Host* Host::by_name(const char* name)
73 return Engine::get_instance()->host_by_name(std::string(name));
75 Host* Host::by_name_or_null(const char* name)
77 return Engine::get_instance()->host_by_name_or_null(std::string(name));
79 Host* Host::by_name_or_null(std::string name)
81 return Engine::get_instance()->host_by_name_or_null(name);
86 smx_actor_t smx_proc = SIMIX_process_self();
87 if (smx_proc == nullptr)
88 xbt_die("Cannot call Host::current() from the maestro context");
89 return smx_proc->host_;
95 simgrid::simix::simcall([this] {
96 this->pimpl_->turn_on();
97 this->pimpl_cpu->turn_on();
98 on_state_change(*this);
103 /** @brief Stop the host if it is on */
104 void Host::turn_off()
107 smx_actor_t self = SIMIX_process_self();
108 simgrid::simix::simcall([this, self] {
109 this->pimpl_cpu->turn_off();
110 this->pimpl_->turn_off();
112 on_state_change(*this);
117 bool Host::is_on() const
119 return this->pimpl_cpu->is_on();
122 int Host::get_pstate_count() const
124 return this->pimpl_cpu->get_pstate_count();
128 * \brief Return a copy of the list of actors that are executing on this host.
130 * Daemons and regular actors are all mixed in this list.
132 std::vector<ActorPtr> Host::get_all_actors()
134 return pimpl_->get_all_actors();
137 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
138 int Host::get_actor_count()
140 return pimpl_->get_actor_count();
144 void Host::getProcesses(std::vector<ActorPtr>* list)
146 auto actors = get_all_actors();
147 for (auto& actor : actors)
148 list->push_back(actor);
152 void Host::actorList(std::vector<ActorPtr>* whereto)
154 auto actors = get_all_actors();
155 for (auto& actor : actors)
156 whereto->push_back(actor);
160 * \brief Find a route toward another host
162 * \param dest [IN] where to
163 * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
164 * \param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
165 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
166 * \pre links!=nullptr
168 * walk through the routing components tree and find a route between hosts
169 * by calling each "get_route" function in each routing component.
171 void Host::route_to(Host* dest, std::vector<Link*>& links, double* latency)
173 std::vector<kernel::resource::LinkImpl*> linkImpls;
174 this->route_to(dest, linkImpls, latency);
175 for (kernel::resource::LinkImpl* const& l : linkImpls)
176 links.push_back(&l->piface_);
179 /** @brief Just like Host::routeTo, but filling an array of link implementations */
180 void Host::route_to(Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency)
182 simgrid::kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint, dest->pimpl_netpoint, links, latency);
183 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
184 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
185 (latency == nullptr ? -1 : *latency));
186 for (auto const& link : links)
187 XBT_CDEBUG(surf_route, "Link %s", link->get_cname());
191 /** Get the properties assigned to a host */
192 std::unordered_map<std::string, std::string>* Host::get_properties()
194 return simgrid::simix::simcall([this] { return this->pimpl_->get_properties(); });
197 /** Retrieve the property value (or nullptr if not set) */
198 const char* Host::get_property(const char* key) const
200 return this->pimpl_->get_property(key);
203 void Host::set_property(std::string key, std::string value)
205 simgrid::simix::simcall([this, key, value] { this->pimpl_->set_property(key, value); });
208 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
209 double Host::get_pstate_speed(int pstate_index) const
211 return simgrid::simix::simcall([this, pstate_index] { return this->pimpl_cpu->get_pstate_peak_speed(pstate_index); });
214 /** @brief Get the peak computing speed in flops/s at the current pstate, taking the external load into account.
216 * The amount of flops per second available for computing depends on several things:
217 * - The current pstate determines the maximal peak computing speed (use @ref get_pstate_speed() to retrieve the
218 * computing speed you would get at another pstate)
219 * - If you declared an external load, then this reduces the available computing speed
220 * (see @ref simgrid::surf::Cpu::set_speed_trace())
222 * The remaining speed is then shared between the executions located on this host.
223 * You can retrieve the amount of tasks currently running on this host with @ref get_load().
225 * The host may have multiple cores, and your executions may be able to use more than a single core.
227 * Finally, executions of priority 2 get twice the amount of flops than executions of priority 1.
229 double Host::get_speed() const
231 return this->pimpl_cpu->get_speed(1.0);
233 /** @brief Returns the current computation load (in flops per second)
234 * The external load (coming from an availability trace) is not taken in account.
236 double Host::get_load() const
238 return this->pimpl_cpu->get_load();
240 /** @brief Get the available speed ratio, between 0 and 1.
242 * This accounts for external load (see @ref simgrid::surf::Cpu::set_speed_trace()).
244 double Host::get_available_speed() const
246 return this->pimpl_cpu->get_speed_ratio();
249 /** @brief Returns the number of core of the processor. */
250 int Host::get_core_count() const
252 return this->pimpl_cpu->get_core_count();
255 /** @brief Set the pstate at which the host should run */
256 void Host::set_pstate(int pstate_index)
258 simgrid::simix::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
260 /** @brief Retrieve the pstate at which the host is currently running */
261 int Host::get_pstate() const
263 return this->pimpl_cpu->get_pstate();
267 * \ingroup simix_storage_management
268 * \brief Returns the list of storages attached to an host.
269 * \return a vector containing all storages attached to the host
271 std::vector<const char*> Host::get_attached_storages() const
273 return simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
276 void Host::getAttachedStorages(std::vector<const char*>* storages)
278 std::vector<const char*> local_storages =
279 simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
280 for (auto elm : local_storages)
281 storages->push_back(elm);
284 std::unordered_map<std::string, Storage*> const& Host::get_mounted_storages()
286 if (mounts_ == nullptr) {
287 mounts_ = new std::unordered_map<std::string, Storage*>();
288 for (auto const& m : this->pimpl_->storage_) {
289 mounts_->insert({m.first, &m.second->piface_});
295 void Host::execute(double flops)
297 execute(flops, 1.0 /* priority */);
299 void Host::execute(double flops, double priority)
301 smx_activity_t s = simcall_execution_start(nullptr, flops, 1 / priority /*priority*/, 0. /*bound*/, this);
302 simcall_execution_wait(s);
306 } // namespace simgrid
308 /* **************************** Public C interface *************************** */
309 size_t sg_host_count()
311 return simgrid::s4u::Engine::get_instance()->get_host_count();
313 /** @brief Returns the host list
315 * Uses sg_host_count() to know the array size.
317 * \return an array of \ref sg_host_t containing all the hosts in the platform.
318 * \remark The host order in this array is generally different from the
319 * creation/declaration order in the XML platform (we use a hash table
321 * \see sg_host_count()
323 sg_host_t* sg_host_list()
325 xbt_assert(sg_host_count() > 0, "There is no host!");
326 std::vector<simgrid::s4u::Host*> hosts = simgrid::s4u::Engine::get_instance()->get_all_hosts();
328 sg_host_t* res = (sg_host_t*)malloc(sizeof(sg_host_t) * hosts.size());
329 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
334 const char* sg_host_get_name(sg_host_t host)
336 return host->get_cname();
339 void* sg_host_extension_get(sg_host_t host, size_t ext)
341 return host->extension(ext);
344 size_t sg_host_extension_create(void (*deleter)(void*))
346 return simgrid::s4u::Host::extension_create(deleter);
349 sg_host_t sg_host_by_name(const char* name)
351 return simgrid::s4u::Host::by_name_or_null(name);
354 static int hostcmp_voidp(const void* pa, const void* pb)
356 return strcmp((*static_cast<simgrid::s4u::Host* const*>(pa))->get_cname(),
357 (*static_cast<simgrid::s4u::Host* const*>(pb))->get_cname());
360 xbt_dynar_t sg_hosts_as_dynar()
362 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
364 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
366 for (auto const& host : list) {
367 if (host && host->pimpl_netpoint && host->pimpl_netpoint->is_host())
368 xbt_dynar_push(res, &host);
370 xbt_dynar_sort(res, hostcmp_voidp);
374 // ========= Layering madness ==============*
376 // ========== User data Layer ==========
377 void* sg_host_user(sg_host_t host)
379 return host->extension(USER_HOST_LEVEL);
381 void sg_host_user_set(sg_host_t host, void* userdata)
383 host->extension_set(USER_HOST_LEVEL, userdata);
385 void sg_host_user_destroy(sg_host_t host)
387 host->extension_set(USER_HOST_LEVEL, nullptr);
390 // ========= storage related functions ============
391 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host)
393 xbt_assert((host != nullptr), "Invalid parameters");
394 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
395 for (auto const& elm : host->get_mounted_storages()) {
396 const char* mount_name = elm.first.c_str();
397 sg_storage_t storage = elm.second;
398 xbt_dict_set(res, mount_name, (void*)storage->get_cname(), nullptr);
404 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host)
406 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
407 std::vector<const char*> storage_vector = host->get_attached_storages();
408 for (auto const& name : storage_vector)
409 xbt_dynar_push(storage_dynar, &name);
410 return storage_dynar;
413 // =========== user-level functions ===============
414 // ================================================
415 /** @brief Returns the total speed of a host */
416 double sg_host_speed(sg_host_t host)
418 return host->get_speed();
421 /** \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
423 * \param host host to test
424 * \param pstate_index pstate to test
425 * \return Returns the processor speed associated with pstate_index
427 double sg_host_get_pstate_speed(sg_host_t host, int pstate_index)
429 return host->get_pstate_speed(pstate_index);
432 /** \ingroup m_host_management
433 * \brief Return the number of cores.
436 * \return the number of cores
438 int sg_host_core_count(sg_host_t host)
440 return host->get_core_count();
443 double sg_host_get_available_speed(sg_host_t host)
445 return host->get_available_speed();
448 /** @brief Returns the number of power states for a host.
450 * See also @ref plugin_energy.
452 int sg_host_get_nb_pstates(sg_host_t host)
454 return host->get_pstate_count();
457 /** @brief Gets the pstate at which that host currently runs.
459 * See also @ref plugin_energy.
461 int sg_host_get_pstate(sg_host_t host)
463 return host->get_pstate();
465 /** @brief Sets the pstate at which that host should run.
467 * See also @ref plugin_energy.
469 void sg_host_set_pstate(sg_host_t host, int pstate)
471 host->set_pstate(pstate);
474 /** \ingroup m_host_management
476 * \brief Start the host if it is off
478 * See also #sg_host_is_on() and #sg_host_is_off() to test the current state of the host and @ref plugin_energy
479 * for more info on DVFS.
481 void sg_host_turn_on(sg_host_t host)
486 /** \ingroup m_host_management
488 * \brief Stop the host if it is on
490 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref plugin_energy
491 * for more info on DVFS.
493 void sg_host_turn_off(sg_host_t host)
498 /** @ingroup m_host_management
499 * @brief Determine if a host is up and running.
501 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
504 * @param host host to test
505 * @return Returns true if the host is up and running, and false if it's currently down
507 int sg_host_is_on(sg_host_t host)
509 return host->is_on();
512 /** @ingroup m_host_management
513 * @brief Determine if a host is currently off.
515 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
518 int sg_host_is_off(sg_host_t host)
520 return host->is_off();
523 /** @brief Get the properties of an host */
524 xbt_dict_t sg_host_get_properties(sg_host_t host)
526 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
527 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()), nullptr);
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(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(sg_host_t from, 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(sg_host_t from, sg_host_t to)
575 std::vector<simgrid::s4u::Link*> vlinks;
577 from->route_to(to, vlinks, &res);
581 * \brief Find the bandwitdh of the route between two hosts
583 * \param from where from
586 double sg_host_route_bandwidth(sg_host_t from, 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 /** @brief Displays debugging information about a host */
601 void sg_host_dump(sg_host_t host)
603 XBT_INFO("Displaying host %s", host->get_cname());
604 XBT_INFO(" - speed: %.0f", host->get_speed());
605 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
606 std::unordered_map<std::string, std::string>* props = host->get_properties();
608 if (not props->empty()) {
609 XBT_INFO(" - properties:");
610 for (auto const& elm : *props) {
611 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
616 /** \brief Return the list of actors attached to an host.
619 * \param whereto a dynar in which we should push actors living on that host
621 void sg_host_get_actor_list(sg_host_t host, xbt_dynar_t whereto)
623 auto actors = host->get_all_actors();
624 for (auto& actor : actors)
625 xbt_dynar_push(whereto, &actor);
628 sg_host_t sg_host_self()
630 smx_actor_t process = SIMIX_process_self();
631 return (process == nullptr) ? nullptr : process->host_;