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/Actor.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "simgrid/s4u/Exec.hpp"
10 #include "src/surf/HostImpl.hpp"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
15 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
17 int USER_HOST_LEVEL = -1;
22 template class Extendable<simgrid::s4u::Host>;
27 simgrid::xbt::signal<void(Host&)> Host::on_creation;
28 simgrid::xbt::signal<void(Host&)> Host::on_destruction;
29 simgrid::xbt::signal<void(Host&)> Host::on_state_change;
30 simgrid::xbt::signal<void(Host&)> Host::on_speed_change;
32 Host::Host(std::string name) : name_(name)
34 xbt_assert(Host::by_name_or_null(name) == nullptr, "Refusing to create a second host named '%s'.", name.c_str());
35 Engine::get_instance()->host_register(std::string(name_), this);
36 new simgrid::surf::HostImpl(this);
41 xbt_assert(currentlyDestroying_, "Please call h->destroy() instead of manually deleting it.");
44 if (pimpl_netpoint != nullptr) // not removed yet by a children class
45 simgrid::s4u::Engine::get_instance()->netpoint_unregister(pimpl_netpoint);
50 /** @brief Fire the required callbacks and destroy the object
52 * Don't delete directly an Host, call h->destroy() instead.
54 * This is cumbersome but this is the simplest solution to ensure that the
55 * onDestruction() callback receives a valid object (because of the destructor
56 * order in a class hierarchy).
60 if (not currentlyDestroying_) {
61 currentlyDestroying_ = true;
62 on_destruction(*this);
63 Engine::get_instance()->host_unregister(std::string(name_));
68 Host* Host::by_name(std::string name)
70 return Engine::get_instance()->host_by_name(name);
72 Host* Host::by_name_or_null(std::string name)
74 return Engine::get_instance()->host_by_name_or_null(name);
79 smx_actor_t smx_proc = SIMIX_process_self();
80 if (smx_proc == nullptr)
81 xbt_die("Cannot call Host::current() from the maestro context");
82 return smx_proc->host_;
88 simgrid::simix::simcall([this] {
89 this->pimpl_->turn_on();
90 this->pimpl_cpu->turn_on();
91 on_state_change(*this);
96 /** @brief Stop the host if it is on */
100 simgrid::simix::simcall([this] {
101 this->pimpl_cpu->turn_off();
102 this->pimpl_->turn_off();
104 on_state_change(*this);
109 bool Host::is_on() const
111 return this->pimpl_cpu->is_on();
114 int Host::get_pstate_count() const
116 return this->pimpl_cpu->get_pstate_count();
120 * @brief Return a copy of the list of actors that are executing on this host.
122 * Daemons and regular actors are all mixed in this list.
124 std::vector<ActorPtr> Host::get_all_actors()
126 return pimpl_->get_all_actors();
129 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
130 int Host::get_actor_count()
132 return pimpl_->get_actor_count();
136 void Host::getProcesses(std::vector<ActorPtr>* list)
138 auto actors = get_all_actors();
139 for (auto& actor : actors)
140 list->push_back(actor);
144 void Host::actorList(std::vector<ActorPtr>* whereto)
146 auto actors = get_all_actors();
147 for (auto& actor : actors)
148 whereto->push_back(actor);
152 * @brief Find a route toward another host
154 * @param dest [IN] where to
155 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
156 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
157 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
158 * @pre links!=nullptr
160 * walk through the routing components tree and find a route between hosts
161 * by calling each "get_route" function in each routing component.
163 void Host::route_to(Host* dest, std::vector<Link*>& links, double* latency)
165 std::vector<kernel::resource::LinkImpl*> linkImpls;
166 this->route_to(dest, linkImpls, latency);
167 for (kernel::resource::LinkImpl* const& l : linkImpls)
168 links.push_back(&l->piface_);
171 /** @brief Just like Host::routeTo, but filling an array of link implementations */
172 void Host::route_to(Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency)
174 simgrid::kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint, dest->pimpl_netpoint, links, latency);
175 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
176 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
177 (latency == nullptr ? -1 : *latency));
178 for (auto const& link : links)
179 XBT_CDEBUG(surf_route, "Link %s", link->get_cname());
183 /** Get the properties assigned to a host */
184 std::unordered_map<std::string, std::string>* Host::get_properties()
186 return simgrid::simix::simcall([this] { return this->pimpl_->get_properties(); });
189 /** Retrieve the property value (or nullptr if not set) */
190 const char* Host::get_property(std::string key) const
192 return this->pimpl_->get_property(key);
195 void Host::set_property(std::string key, std::string value)
197 simgrid::simix::simcall([this, key, value] { this->pimpl_->set_property(key, value); });
200 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
201 double Host::get_pstate_speed(int pstate_index) const
203 return simgrid::simix::simcall([this, pstate_index] { return this->pimpl_cpu->get_pstate_peak_speed(pstate_index); });
206 /** @brief Get the peak computing speed in flops/s at the current pstate, taking the external load into account.
208 * The amount of flops per second available for computing depends on several things:
209 * - The current pstate determines the maximal peak computing speed (use @ref get_pstate_speed() to retrieve the
210 * computing speed you would get at another pstate)
211 * - If you declared an external load, then this reduces the available computing speed
212 * (see @ref simgrid::surf::Cpu::set_speed_trace())
214 * The remaining speed is then shared between the executions located on this host.
215 * You can retrieve the amount of tasks currently running on this host with @ref get_load().
217 * The host may have multiple cores, and your executions may be able to use more than a single core.
219 * Finally, executions of priority 2 get twice the amount of flops than executions of priority 1.
221 double Host::get_speed() const
223 return this->pimpl_cpu->get_speed(1.0);
225 /** @brief Returns the current computation load (in flops per second)
226 * The external load (coming from an availability trace) is not taken in account.
228 double Host::get_load() const
230 return this->pimpl_cpu->get_load();
232 /** @brief Get the available speed ratio, between 0 and 1.
234 * This accounts for external load (see @ref simgrid::surf::Cpu::set_speed_trace()).
236 double Host::get_available_speed() const
238 return this->pimpl_cpu->get_speed_ratio();
241 /** @brief Returns the number of core of the processor. */
242 int Host::get_core_count() const
244 return this->pimpl_cpu->get_core_count();
247 /** @brief Set the pstate at which the host should run */
248 void Host::set_pstate(int pstate_index)
250 simgrid::simix::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
252 /** @brief Retrieve the pstate at which the host is currently running */
253 int Host::get_pstate() const
255 return this->pimpl_cpu->get_pstate();
259 * @ingroup simix_storage_management
260 * @brief Returns the list of storages attached to an host.
261 * @return a vector containing all storages attached to the host
263 std::vector<const char*> Host::get_attached_storages() const
265 return simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
268 void Host::getAttachedStorages(std::vector<const char*>* storages)
270 std::vector<const char*> local_storages =
271 simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
272 for (auto elm : local_storages)
273 storages->push_back(elm);
276 std::unordered_map<std::string, Storage*> const& Host::get_mounted_storages()
278 if (mounts_ == nullptr) {
279 mounts_ = new std::unordered_map<std::string, Storage*>();
280 for (auto const& m : this->pimpl_->storage_) {
281 mounts_->insert({m.first, &m.second->piface_});
287 void Host::execute(double flops)
289 execute(flops, 1.0 /* priority */);
291 void Host::execute(double flops, double priority)
293 this_actor::exec_init(flops)->set_host(this)->set_priority(1 / priority)->start()->wait();
297 } // namespace simgrid
299 /* **************************** Public C interface *************************** */
300 size_t sg_host_count()
302 return simgrid::s4u::Engine::get_instance()->get_host_count();
304 /** @brief Returns the host list
306 * Uses sg_host_count() to know the array size.
308 * @return an array of @ref sg_host_t containing all the hosts in the platform.
309 * @remark The host order in this array is generally different from the
310 * creation/declaration order in the XML platform (we use a hash table
312 * @see sg_host_count()
314 sg_host_t* sg_host_list()
316 xbt_assert(sg_host_count() > 0, "There is no host!");
317 std::vector<simgrid::s4u::Host*> hosts = simgrid::s4u::Engine::get_instance()->get_all_hosts();
319 sg_host_t* res = (sg_host_t*)malloc(sizeof(sg_host_t) * hosts.size());
320 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
325 const char* sg_host_get_name(sg_host_t host)
327 return host->get_cname();
330 void* sg_host_extension_get(sg_host_t host, size_t ext)
332 return host->extension(ext);
335 size_t sg_host_extension_create(void (*deleter)(void*))
337 return simgrid::s4u::Host::extension_create(deleter);
340 sg_host_t sg_host_by_name(const char* name)
342 return simgrid::s4u::Host::by_name_or_null(name);
345 static int hostcmp_voidp(const void* pa, const void* pb)
347 return strcmp((*static_cast<simgrid::s4u::Host* const*>(pa))->get_cname(),
348 (*static_cast<simgrid::s4u::Host* const*>(pb))->get_cname());
351 xbt_dynar_t sg_hosts_as_dynar()
353 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
355 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
357 for (auto const& host : list) {
358 if (host && host->pimpl_netpoint && host->pimpl_netpoint->is_host())
359 xbt_dynar_push(res, &host);
361 xbt_dynar_sort(res, hostcmp_voidp);
365 // ========= Layering madness ==============*
367 // ========== User data Layer ==========
368 void* sg_host_user(sg_host_t host)
370 return host->extension(USER_HOST_LEVEL);
372 void sg_host_user_set(sg_host_t host, void* userdata)
374 host->extension_set(USER_HOST_LEVEL, userdata);
376 void sg_host_user_destroy(sg_host_t host)
378 host->extension_set(USER_HOST_LEVEL, nullptr);
381 // ========= storage related functions ============
382 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host)
384 xbt_assert((host != nullptr), "Invalid parameters");
385 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
386 for (auto const& elm : host->get_mounted_storages()) {
387 const char* mount_name = elm.first.c_str();
388 sg_storage_t storage = elm.second;
389 xbt_dict_set(res, mount_name, (void*)storage->get_cname(), nullptr);
395 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host)
397 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
398 std::vector<const char*> storage_vector = host->get_attached_storages();
399 for (auto const& name : storage_vector)
400 xbt_dynar_push(storage_dynar, &name);
401 return storage_dynar;
404 // =========== user-level functions ===============
405 // ================================================
406 /** @brief Returns the total speed of a host */
407 double sg_host_speed(sg_host_t host)
409 return host->get_speed();
412 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
414 * @param host host to test
415 * @param pstate_index pstate to test
416 * @return Returns the processor speed associated with pstate_index
418 double sg_host_get_pstate_speed(sg_host_t host, int pstate_index)
420 return host->get_pstate_speed(pstate_index);
423 /** @ingroup m_host_management
424 * @brief Return the number of cores.
427 * @return the number of cores
429 int sg_host_core_count(sg_host_t host)
431 return host->get_core_count();
434 double sg_host_get_available_speed(sg_host_t host)
436 return host->get_available_speed();
439 /** @brief Returns the number of power states for a host.
441 * See also @ref plugin_energy.
443 int sg_host_get_nb_pstates(sg_host_t host)
445 return host->get_pstate_count();
448 /** @brief Gets the pstate at which that host currently runs.
450 * See also @ref plugin_energy.
452 int sg_host_get_pstate(sg_host_t host)
454 return host->get_pstate();
456 /** @brief Sets the pstate at which that host should run.
458 * See also @ref plugin_energy.
460 void sg_host_set_pstate(sg_host_t host, int pstate)
462 host->set_pstate(pstate);
465 /** @ingroup m_host_management
467 * @brief Start the host if it is off
469 * See also #sg_host_is_on() and #sg_host_is_off() to test the current state of the host and @ref plugin_energy
470 * for more info on DVFS.
472 void sg_host_turn_on(sg_host_t host)
477 /** @ingroup m_host_management
479 * @brief Stop the host if it is on
481 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref plugin_energy
482 * for more info on DVFS.
484 void sg_host_turn_off(sg_host_t host)
489 /** @ingroup m_host_management
490 * @brief Determine if a host is up and running.
492 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
495 * @param host host to test
496 * @return Returns true if the host is up and running, and false if it's currently down
498 int sg_host_is_on(sg_host_t host)
500 return host->is_on();
503 /** @ingroup m_host_management
504 * @brief Determine if a host is currently off.
506 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
509 int sg_host_is_off(sg_host_t host)
511 return host->is_off();
514 /** @brief Get the properties of an host */
515 xbt_dict_t sg_host_get_properties(sg_host_t host)
517 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
518 std::unordered_map<std::string, std::string>* props = host->get_properties();
519 if (props == nullptr)
521 for (auto const& elm : *props) {
522 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()), nullptr);
527 /** @ingroup m_host_management
528 * @brief Returns the value of a given host property
531 * @param name a property name
532 * @return value of a property (or nullptr if property not set)
534 const char* sg_host_get_property_value(sg_host_t host, const char* name)
536 return host->get_property(name);
539 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
541 host->set_property(name, value);
545 * @brief Find a route between two hosts
547 * @param from where from
549 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
551 void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
553 std::vector<simgrid::s4u::Link*> vlinks;
554 from->route_to(to, vlinks, nullptr);
555 for (auto const& link : vlinks)
556 xbt_dynar_push(links, &link);
559 * @brief Find the latency of the route between two hosts
561 * @param from where from
564 double sg_host_route_latency(sg_host_t from, sg_host_t to)
566 std::vector<simgrid::s4u::Link*> vlinks;
568 from->route_to(to, vlinks, &res);
572 * @brief Find the bandwitdh of the route between two hosts
574 * @param from where from
577 double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
579 double min_bandwidth = -1.0;
581 std::vector<simgrid::s4u::Link*> vlinks;
582 from->route_to(to, vlinks, nullptr);
583 for (auto const& link : vlinks) {
584 double bandwidth = link->get_bandwidth();
585 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
586 min_bandwidth = bandwidth;
588 return min_bandwidth;
591 /** @brief Displays debugging information about a host */
592 void sg_host_dump(sg_host_t host)
594 XBT_INFO("Displaying host %s", host->get_cname());
595 XBT_INFO(" - speed: %.0f", host->get_speed());
596 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
597 std::unordered_map<std::string, std::string>* props = host->get_properties();
599 if (not props->empty()) {
600 XBT_INFO(" - properties:");
601 for (auto const& elm : *props) {
602 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
607 /** @brief Return the list of actors attached to an host.
610 * @param whereto a dynar in which we should push actors living on that host
612 void sg_host_get_actor_list(sg_host_t host, xbt_dynar_t whereto)
614 auto actors = host->get_all_actors();
615 for (auto& actor : actors)
616 xbt_dynar_push(whereto, &actor);
619 sg_host_t sg_host_self()
621 smx_actor_t process = SIMIX_process_self();
622 return (process == nullptr) ? nullptr : process->host_;