1 /* Copyright (c) 2006-2021. 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/host.h"
7 #include "simgrid/kernel/routing/NetPoint.hpp"
8 #include "simgrid/s4u/Actor.hpp"
9 #include "simgrid/s4u/Comm.hpp"
10 #include "simgrid/s4u/Engine.hpp"
11 #include "simgrid/s4u/Exec.hpp"
12 #include "simgrid/s4u/VirtualMachine.hpp"
13 #include "src/plugins/vm/VirtualMachineImpl.hpp"
14 #include "src/surf/HostImpl.hpp"
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
20 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
24 template class xbt::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);
40 Host* Host::set_netpoint(kernel::routing::NetPoint* netpoint)
42 pimpl_netpoint_ = netpoint;
49 if (pimpl_netpoint_ != nullptr) // not removed yet by a children class
50 Engine::get_instance()->netpoint_unregister(pimpl_netpoint_);
54 /** @brief Fire the required callbacks and destroy the object
56 * Don't delete directly a host, call h->destroy() instead.
58 * This is cumbersome but this is the simplest solution to ensure that the on_destruction() callback receives a valid
59 * object (because of the destructor order in a class hierarchy).
63 on_destruction(*this);
64 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 = kernel::actor::ActorImpl::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 const kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
101 kernel::actor::simcall([this, self] {
102 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
103 if (vm->get_pm() == this) {
107 this->pimpl_cpu->turn_off();
108 this->pimpl_->turn_off(self);
110 on_state_change(*this);
115 bool Host::is_on() const
117 return this->pimpl_cpu->is_on();
120 int Host::get_pstate_count() const
122 return this->pimpl_cpu->get_pstate_count();
126 * @brief Return a copy of the list of actors that are executing on this host.
128 * Daemons and regular actors are all mixed in this list.
130 std::vector<ActorPtr> Host::get_all_actors() const
132 return pimpl_->get_all_actors();
135 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
136 int Host::get_actor_count() const
138 return pimpl_->get_actor_count();
142 * @brief Find a route toward another host
144 * @param dest [IN] where to
145 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
146 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
147 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
148 * @pre links!=nullptr
150 * walk through the routing components tree and find a route between hosts
151 * by calling each "get_route" function in each routing component.
153 void Host::route_to(const Host* dest, std::vector<Link*>& links, double* latency) const
155 std::vector<kernel::resource::LinkImpl*> linkImpls;
156 this->route_to(dest, linkImpls, latency);
157 for (auto* l : linkImpls)
158 links.push_back(l->get_iface());
161 /** @brief Just like Host::routeTo, but filling an array of link implementations */
162 void Host::route_to(const Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency) const
164 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint_, dest->get_netpoint(), links, latency);
165 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
166 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
167 (latency == nullptr ? -1 : *latency));
168 for (auto const* link : links)
169 XBT_CDEBUG(surf_route, " Link '%s'", link->get_cname());
173 /** @brief Returns the networking zone englobing that host */
174 NetZone* Host::get_englobing_zone()
176 return pimpl_netpoint_->get_englobing_zone()->get_iface();
179 void Host::sendto(Host* dest, double byte_amount)
181 sendto_async(dest, byte_amount)->wait();
184 CommPtr Host::sendto_async(Host* dest, double byte_amount)
186 return Comm::sendto_async(this, dest, byte_amount);
189 /** Get the properties assigned to a host */
190 const std::unordered_map<std::string, std::string>* Host::get_properties() const
192 return this->pimpl_->get_properties();
195 /** Retrieve the property value (or nullptr if not set) */
196 const char* Host::get_property(const std::string& key) const
198 return this->pimpl_->get_property(key);
201 Host* Host::set_property(const std::string& key, const std::string& value)
203 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
207 Host* Host::set_properties(const std::unordered_map<std::string, std::string>& properties)
209 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
213 /** Specify a profile turning the host on and off according to an exhaustive list or a stochastic law.
214 * The profile must contain boolean values. */
215 void Host::set_state_profile(kernel::profile::Profile* p)
217 return kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
219 /** Specify a profile modeling the external load according to an exhaustive list or a stochastic law.
221 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
222 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
223 * at this pstate level) by the rate coming from the profile.
225 void Host::set_speed_profile(kernel::profile::Profile* p)
227 return kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
230 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
231 double Host::get_pstate_speed(int pstate_index) const
233 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
236 double Host::get_speed() const
238 return this->pimpl_cpu->get_speed(1.0);
240 double Host::get_load() const
242 return this->pimpl_cpu->get_load();
244 double Host::get_available_speed() const
246 return this->pimpl_cpu->get_speed_ratio();
249 int Host::get_core_count() const
251 return this->pimpl_cpu->get_core_count();
254 /** @brief Set the pstate at which the host should run */
255 void Host::set_pstate(int pstate_index)
257 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
259 /** @brief Retrieve the pstate at which the host is currently running */
260 int Host::get_pstate() const
262 return this->pimpl_cpu->get_pstate();
265 std::vector<Disk*> Host::get_disks() const
267 return kernel::actor::simcall([this] { return this->pimpl_->get_disks(); });
270 Disk* Host::create_disk()
272 auto pimpl = surf_disk_model->create_disk();
273 pimpl->set_host(this);
274 return pimpl->get_iface();
277 void Host::add_disk(const Disk* disk)
279 kernel::actor::simcall([this, disk] { this->pimpl_->add_disk(disk); });
282 void Host::remove_disk(const std::string& disk_name)
284 kernel::actor::simcall([this, disk_name] { this->pimpl_->remove_disk(disk_name); });
287 ExecPtr Host::exec_init(double flops) const
289 return this_actor::exec_init(flops);
292 ExecPtr Host::exec_async(double flops) const
294 return this_actor::exec_async(flops);
297 void Host::execute(double flops) const
299 execute(flops, 1.0 /* priority */);
302 void Host::execute(double flops, double priority) const
304 this_actor::exec_init(flops)->set_priority(1 / priority)->vetoable_start()->wait();
308 } // namespace simgrid
310 /* **************************** Public C interface *************************** */
311 size_t sg_host_count()
313 return simgrid::s4u::Engine::get_instance()->get_host_count();
315 sg_host_t* sg_host_list()
317 const simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
318 size_t host_count = e->get_host_count();
319 xbt_assert(host_count > 0, "There is no host!");
320 std::vector<simgrid::s4u::Host*> hosts = e->get_all_hosts();
322 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
323 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
328 const char* sg_host_get_name(const_sg_host_t host)
330 return host->get_cname();
333 void* sg_host_extension_get(const_sg_host_t host, size_t ext)
335 return host->extension(ext);
338 size_t sg_host_extension_create(void (*deleter)(void*))
340 return simgrid::s4u::Host::extension_create(deleter);
343 sg_host_t sg_host_by_name(const char* name)
345 return simgrid::s4u::Host::by_name_or_null(name);
348 xbt_dynar_t sg_hosts_as_dynar() // XBT_ATTRIB_DEPRECATED_v330
350 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
352 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
353 return not host || not host->get_netpoint() || not host->get_netpoint()->is_host();
355 std::sort(begin(list), last,
356 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
358 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
359 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
363 // ========= Layering madness ==============*
365 // ========== User data Layer ==========
366 void* sg_host_get_data(const_sg_host_t host)
368 return host->get_data();
370 void sg_host_set_data(sg_host_t host, void* userdata)
372 host->set_data(userdata);
374 void* sg_host_data(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
376 return sg_host_get_data(host);
378 void sg_host_data_set(sg_host_t host, void* userdata) // XBT_ATTRIB_DEPRECATED_v330
380 sg_host_set_data(host, userdata);
382 void* sg_host_user(sg_host_t host) // XBT_ATTRIB_DEPRECATED_v328
384 return host->get_data();
386 void sg_host_user_set(sg_host_t host, void* userdata) // XBT_ATTRIB_DEPRECATED_v328
388 host->set_data(userdata);
390 void sg_host_user_destroy(sg_host_t host) // XBT_ATTRIB_DEPRECATED_v328
392 host->set_data(nullptr);
395 // ========= Disk related functions ============
396 void sg_host_get_disks(const_sg_host_t host, unsigned int* disk_count, sg_disk_t** disks)
398 std::vector<sg_disk_t> list = host->get_disks();
399 *disk_count = list.size();
400 *disks = static_cast<sg_disk_t*>(xbt_malloc(sizeof(sg_disk_t) * (*disk_count)));
401 for (size_t i = 0; i < *disk_count; i++)
402 (*disks)[i] = list[i];
405 // =========== user-level functions ===============
406 // ================================================
407 /** @brief Returns the total speed of a host */
408 double sg_host_get_speed(const_sg_host_t host)
410 return host->get_speed();
413 double sg_host_speed(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
415 return sg_host_get_speed(host);
418 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
420 * @param host host to test
421 * @param pstate_index pstate to test
422 * @return Returns the processor speed associated with pstate_index
424 double sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
426 return host->get_pstate_speed(pstate_index);
429 /** @ingroup m_host_management
430 * @brief Return the number of cores.
433 * @return the number of cores
435 int sg_host_core_count(const_sg_host_t host)
437 return host->get_core_count();
440 double sg_host_get_available_speed(const_sg_host_t host)
442 return host->get_available_speed();
445 /** @brief Returns the number of power states for a host.
447 * See also @ref plugin_energy.
449 int sg_host_get_nb_pstates(const_sg_host_t host)
451 return host->get_pstate_count();
454 /** @brief Gets the pstate at which that host currently runs.
456 * See also @ref plugin_energy.
458 int sg_host_get_pstate(const_sg_host_t host)
460 return host->get_pstate();
462 /** @brief Sets the pstate at which that host should run.
464 * See also @ref plugin_energy.
466 void sg_host_set_pstate(sg_host_t host, int pstate)
468 host->set_pstate(pstate);
471 /** @ingroup m_host_management
473 * @brief Start the host if it is off
475 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
476 * for more info on DVFS.
478 void sg_host_turn_on(sg_host_t host)
483 /** @ingroup m_host_management
485 * @brief Stop the host if it is on
487 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
488 * for more info on DVFS.
490 void sg_host_turn_off(sg_host_t host)
495 /** @ingroup m_host_management
496 * @brief Determine if a host is up and running.
498 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
501 * @param host host to test
502 * @return Returns true if the host is up and running, and false if it's currently down
504 int sg_host_is_on(const_sg_host_t host)
506 return host->is_on();
509 /** @brief Get the properties of a host */
510 xbt_dict_t sg_host_get_properties(const_sg_host_t host)
512 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
513 const std::unordered_map<std::string, std::string>* props = host->get_properties();
514 if (props == nullptr)
516 for (auto const& elm : *props) {
517 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()));
522 /** @ingroup m_host_management
523 * @brief Returns the value of a given host property
526 * @param name a property name
527 * @return value of a property (or nullptr if property not set)
529 const char* sg_host_get_property_value(const_sg_host_t host, const char* name)
531 return host->get_property(name);
534 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
536 host->set_property(name, value);
540 * @brief Find a route between two hosts
542 * @param from where from
544 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
546 void sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
548 std::vector<simgrid::s4u::Link*> vlinks;
549 from->route_to(to, vlinks, nullptr);
550 for (auto const& link : vlinks)
551 xbt_dynar_push(links, &link);
554 * @brief Find the latency of the route between two hosts
556 * @param from where from
559 double sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
561 std::vector<simgrid::s4u::Link*> vlinks;
563 from->route_to(to, vlinks, &res);
567 * @brief Find the bandwidth of the route between two hosts
569 * @param from where from
572 double sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
574 double min_bandwidth = -1.0;
576 std::vector<simgrid::s4u::Link*> vlinks;
577 from->route_to(to, vlinks, nullptr);
578 for (auto const& link : vlinks) {
579 double bandwidth = link->get_bandwidth();
580 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
581 min_bandwidth = bandwidth;
583 return min_bandwidth;
586 void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links) // XBT_ATTRIB_DEPRECATED_v330
588 sg_host_get_route(from, to, links);
591 double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
593 return sg_host_get_route_latency(from, to);
596 double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
598 return sg_host_get_route_bandwidth(from, to);
601 void sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
603 from->sendto(to, byte_amount);
606 /** @brief Displays debugging information about a host */
607 void sg_host_dump(const_sg_host_t host)
609 XBT_INFO("Displaying host %s", host->get_cname());
610 XBT_INFO(" - speed: %.0f", host->get_speed());
611 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
612 const std::unordered_map<std::string, std::string>* props = host->get_properties();
614 if (not props->empty()) {
615 XBT_INFO(" - properties:");
616 for (auto const& elm : *props) {
617 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
622 /** @brief Return the list of actors attached to a host.
625 * @param whereto a dynar in which we should push actors living on that host
627 void sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
629 auto const actors = host->get_all_actors();
630 for (auto const& actor : actors)
631 xbt_dynar_push(whereto, &actor);
634 sg_host_t sg_host_self()
636 return SIMIX_is_maestro() ? nullptr : simgrid::kernel::actor::ActorImpl::self()->get_host();
639 /* needs to be public and without simcall for exceptions and logging events */
640 const char* sg_host_self_get_name()
642 const char* res = "";
643 if (not SIMIX_is_maestro()) {
644 const simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
646 res = host->get_cname();
651 double sg_host_get_load(const_sg_host_t host)
653 return host->get_load();
656 double sg_host_load(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
658 return sg_host_get_load(host);