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->extension<simgrid::simix::Host>()->turnOn();
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 simgrid::simix::Host* host = this->extension<simgrid::simix::Host>();
111 xbt_assert((host != nullptr), "Invalid parameters");
113 this->pimpl_cpu->turn_off();
115 /* Clean Simulator data */
116 if (not host->process_list.empty()) {
117 for (auto& process : host->process_list) {
118 SIMIX_process_kill(&process, self);
119 XBT_DEBUG("Killing %s@%s on behalf of %s which turned off that host.", process.get_cname(),
120 process.host->get_cname(), self->get_cname());
124 on_state_change(*this);
131 return this->pimpl_cpu->is_on();
134 int Host::getPstatesCount() const
136 return this->pimpl_cpu->get_pstates_count();
140 * \brief Return a copy of the list of actors that are executing on this host.
142 * Daemons and regular actors are all mixed in this list.
144 std::vector<ActorPtr> Host::get_all_actors()
146 std::vector<ActorPtr> res;
147 for (auto& actor : this->extension<simgrid::simix::Host>()->process_list)
148 res.push_back(actor.ciface());
152 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
153 int Host::get_actor_count()
155 return this->extension<simgrid::simix::Host>()->process_list.size();
159 void Host::getProcesses(std::vector<ActorPtr>* list)
161 for (auto& actor : this->extension<simgrid::simix::Host>()->process_list) {
162 list->push_back(actor.iface());
167 void Host::actorList(std::vector<ActorPtr>* whereto)
169 for (auto& actor : this->extension<simgrid::simix::Host>()->process_list) {
170 whereto->push_back(actor.ciface());
175 * \brief Find a route toward another host
177 * \param dest [IN] where to
178 * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
179 * \param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
180 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
181 * \pre links!=nullptr
183 * walk through the routing components tree and find a route between hosts
184 * by calling each "get_route" function in each routing component.
186 void Host::routeTo(Host* dest, std::vector<Link*>& links, double* latency)
188 std::vector<kernel::resource::LinkImpl*> linkImpls;
189 this->routeTo(dest, linkImpls, latency);
190 for (kernel::resource::LinkImpl* const& l : linkImpls)
191 links.push_back(&l->piface_);
194 /** @brief Just like Host::routeTo, but filling an array of link implementations */
195 void Host::routeTo(Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency)
197 simgrid::kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint, dest->pimpl_netpoint, links, latency);
198 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
199 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
200 (latency == nullptr ? -1 : *latency));
201 for (auto const& link : links)
202 XBT_CDEBUG(surf_route, "Link %s", link->get_cname());
206 /** Get the properties assigned to a host */
207 std::map<std::string, std::string>* Host::getProperties()
209 return simgrid::simix::simcall([this] { return this->pimpl_->getProperties(); });
212 /** Retrieve the property value (or nullptr if not set) */
213 const char* Host::get_property(const char* key)
215 return this->pimpl_->getProperty(key);
218 void Host::set_property(std::string key, std::string value)
220 simgrid::simix::simcall([this, key, value] { this->pimpl_->setProperty(key, value); });
223 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
224 double Host::getPstateSpeed(int pstate_index)
226 return simgrid::simix::simcall([this, pstate_index] { return this->pimpl_cpu->getPstateSpeed(pstate_index); });
229 /** @brief Get the peak processor speed in flops/s, (under full load (=1.0), at the current pstate) */
230 double Host::getSpeed()
232 return this->pimpl_cpu->getSpeed(1.0);
234 double Host::get_available_speed()
236 return this->pimpl_cpu->get_available_speed();
239 /** @brief Returns the number of core of the processor. */
240 int Host::getCoreCount()
242 return this->pimpl_cpu->get_cores_count();
245 /** @brief Set the pstate at which the host should run */
246 void Host::setPstate(int pstate_index)
248 simgrid::simix::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
250 /** @brief Retrieve the pstate at which the host is currently running */
251 int Host::getPstate()
253 return this->pimpl_cpu->get_pstate();
257 * \ingroup simix_storage_management
258 * \brief Returns the list of storages attached to an host.
259 * \return a vector containing all storages attached to the host
261 std::vector<const char*> Host::get_attached_storages()
263 return simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
266 void Host::getAttachedStorages(std::vector<const char*>* storages)
268 std::vector<const char*> local_storages =
269 simgrid::simix::simcall([this] { return this->pimpl_->get_attached_storages(); });
270 for (auto elm : local_storages)
271 storages->push_back(elm);
274 std::unordered_map<std::string, Storage*> const& Host::getMountedStorages()
276 if (mounts_ == nullptr) {
277 mounts_ = new std::unordered_map<std::string, Storage*>();
278 for (auto const& m : this->pimpl_->storage_) {
279 mounts_->insert({m.first, &m.second->piface_});
285 void Host::execute(double flops)
287 execute(flops, 1.0 /* priority */);
289 void Host::execute(double flops, double priority)
291 smx_activity_t s = simcall_execution_start(nullptr, flops, 1 / priority /*priority*/, 0. /*bound*/, this);
292 simcall_execution_wait(s);
295 double Host::getLoad()
297 return this->pimpl_cpu->get_load();
301 } // namespace simgrid
303 /* **************************** Public C interface *************************** */
304 size_t sg_host_count()
306 return simgrid::s4u::Engine::get_instance()->get_host_count();
308 /** @brief Returns the host list
310 * Uses sg_host_count() to know the array size.
312 * \return an array of \ref sg_host_t containing all the hosts in the platform.
313 * \remark The host order in this array is generally different from the
314 * creation/declaration order in the XML platform (we use a hash table
316 * \see sg_host_count()
318 sg_host_t* sg_host_list()
320 xbt_assert(sg_host_count() > 0, "There is no host!");
321 std::vector<simgrid::s4u::Host*> hosts = simgrid::s4u::Engine::get_instance()->get_all_hosts();
323 sg_host_t* res = (sg_host_t*)malloc(sizeof(sg_host_t) * hosts.size());
324 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
329 const char* sg_host_get_name(sg_host_t host)
331 return host->get_cname();
334 void* sg_host_extension_get(sg_host_t host, size_t ext)
336 return host->extension(ext);
339 size_t sg_host_extension_create(void (*deleter)(void*))
341 return simgrid::s4u::Host::extension_create(deleter);
344 sg_host_t sg_host_by_name(const char* name)
346 return simgrid::s4u::Host::by_name_or_null(name);
349 static int hostcmp_voidp(const void* pa, const void* pb)
351 return strcmp((*static_cast<simgrid::s4u::Host* const*>(pa))->get_cname(),
352 (*static_cast<simgrid::s4u::Host* const*>(pb))->get_cname());
355 xbt_dynar_t sg_hosts_as_dynar()
357 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
359 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
361 for (auto const& host : list) {
362 if (host && host->pimpl_netpoint && host->pimpl_netpoint->is_host())
363 xbt_dynar_push(res, &host);
365 xbt_dynar_sort(res, hostcmp_voidp);
369 // ========= Layering madness ==============*
371 // ========== User data Layer ==========
372 void* sg_host_user(sg_host_t host)
374 return host->extension(USER_HOST_LEVEL);
376 void sg_host_user_set(sg_host_t host, void* userdata)
378 host->extension_set(USER_HOST_LEVEL, userdata);
380 void sg_host_user_destroy(sg_host_t host)
382 host->extension_set(USER_HOST_LEVEL, nullptr);
385 // ========= storage related functions ============
386 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host)
388 xbt_assert((host != nullptr), "Invalid parameters");
389 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
390 for (auto const& elm : host->getMountedStorages()) {
391 const char* mount_name = elm.first.c_str();
392 sg_storage_t storage = elm.second;
393 xbt_dict_set(res, mount_name, (void*)storage->get_cname(), nullptr);
399 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host)
401 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
402 std::vector<const char*> storage_vector = host->get_attached_storages();
403 for (auto const& name : storage_vector)
404 xbt_dynar_push(storage_dynar, &name);
405 return storage_dynar;
408 // =========== user-level functions ===============
409 // ================================================
410 /** @brief Returns the total speed of a host */
411 double sg_host_speed(sg_host_t host)
413 return host->getSpeed();
416 /** \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
418 * \param host host to test
419 * \param pstate_index pstate to test
420 * \return Returns the processor speed associated with pstate_index
422 double sg_host_get_pstate_speed(sg_host_t host, int pstate_index)
424 return host->getPstateSpeed(pstate_index);
427 /** \ingroup m_host_management
428 * \brief Return the number of cores.
431 * \return the number of cores
433 int sg_host_core_count(sg_host_t host)
435 return host->getCoreCount();
438 double sg_host_get_available_speed(sg_host_t host)
440 return host->get_available_speed();
443 /** @brief Returns the number of power states for a host.
445 * See also @ref plugin_energy.
447 int sg_host_get_nb_pstates(sg_host_t host)
449 return host->getPstatesCount();
452 /** @brief Gets the pstate at which that host currently runs.
454 * See also @ref plugin_energy.
456 int sg_host_get_pstate(sg_host_t host)
458 return host->getPstate();
460 /** @brief Sets the pstate at which that host should run.
462 * See also @ref plugin_energy.
464 void sg_host_set_pstate(sg_host_t host, int pstate)
466 host->setPstate(pstate);
469 /** \ingroup m_host_management
471 * \brief Start the host if it is off
473 * See also #sg_host_is_on() and #sg_host_is_off() to test the current state of the host and @ref plugin_energy
474 * for more info on DVFS.
476 void sg_host_turn_on(sg_host_t host)
481 /** \ingroup m_host_management
483 * \brief Stop the host if it is on
485 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref plugin_energy
486 * for more info on DVFS.
488 void sg_host_turn_off(sg_host_t host)
493 /** @ingroup m_host_management
494 * @brief Determine if a host is up and running.
496 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
499 * @param host host to test
500 * @return Returns true if the host is up and running, and false if it's currently down
502 int sg_host_is_on(sg_host_t host)
504 return host->is_on();
507 /** @ingroup m_host_management
508 * @brief Determine if a host is currently off.
510 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
513 int sg_host_is_off(sg_host_t host)
515 return host->is_off();
518 /** @brief Get the properties of an host */
519 xbt_dict_t sg_host_get_properties(sg_host_t host)
521 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
522 std::map<std::string, std::string>* props = host->getProperties();
523 if (props == nullptr)
525 for (auto const& elm : *props) {
526 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()), nullptr);
531 /** \ingroup m_host_management
532 * \brief Returns the value of a given host property
535 * \param name a property name
536 * \return value of a property (or nullptr if property not set)
538 const char* sg_host_get_property_value(sg_host_t host, const char* name)
540 return host->get_property(name);
543 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
545 host->set_property(name, value);
549 * \brief Find a route between two hosts
551 * \param from where from
553 * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
555 void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
557 std::vector<simgrid::s4u::Link*> vlinks;
558 from->routeTo(to, vlinks, nullptr);
559 for (auto const& link : vlinks)
560 xbt_dynar_push(links, &link);
563 * \brief Find the latency of the route between two hosts
565 * \param from where from
568 double sg_host_route_latency(sg_host_t from, sg_host_t to)
570 std::vector<simgrid::s4u::Link*> vlinks;
572 from->routeTo(to, vlinks, &res);
576 * \brief Find the bandwitdh of the route between two hosts
578 * \param from where from
581 double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
583 double min_bandwidth = -1.0;
585 std::vector<simgrid::s4u::Link*> vlinks;
586 from->routeTo(to, vlinks, nullptr);
587 for (auto const& link : vlinks) {
588 double bandwidth = link->get_bandwidth();
589 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
590 min_bandwidth = bandwidth;
592 return min_bandwidth;
595 /** @brief Displays debugging information about a host */
596 void sg_host_dump(sg_host_t host)
598 XBT_INFO("Displaying host %s", host->get_cname());
599 XBT_INFO(" - speed: %.0f", host->getSpeed());
600 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
601 std::map<std::string, std::string>* props = host->getProperties();
603 if (not props->empty()) {
604 XBT_INFO(" - properties:");
605 for (auto const& elm : *props) {
606 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
611 /** \brief Return the list of actors attached to an host.
614 * \param whereto a dynar in which we should push actors living on that host
616 void sg_host_get_actor_list(sg_host_t host, xbt_dynar_t whereto)
618 for (auto& actor : host->extension<simgrid::simix::Host>()->process_list) {
619 s4u_Actor* p = actor.ciface();
620 xbt_dynar_push(whereto, &p);
624 sg_host_t sg_host_self()
626 smx_actor_t process = SIMIX_process_self();
627 return (process == nullptr) ? nullptr : process->host;