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/Exception.hpp"
7 #include "simgrid/host.h"
8 #include "simgrid/kernel/routing/NetPoint.hpp"
9 #include "simgrid/s4u/Actor.hpp"
10 #include "simgrid/s4u/Comm.hpp"
11 #include "simgrid/s4u/Engine.hpp"
12 #include "simgrid/s4u/Exec.hpp"
13 #include "simgrid/s4u/VirtualMachine.hpp"
14 #include "src/plugins/vm/VirtualMachineImpl.hpp"
15 #include "src/surf/HostImpl.hpp"
16 #include "xbt/parse_units.hpp"
21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(s4u_host, s4u, "Logging specific to the S4U hosts");
22 XBT_LOG_EXTERNAL_CATEGORY(surf_route);
26 template class xbt::Extendable<s4u::Host>;
30 xbt::signal<void(Host&)> Host::on_creation;
31 xbt::signal<void(Host const&)> Host::on_destruction;
32 xbt::signal<void(Host const&)> Host::on_state_change;
33 xbt::signal<void(Host const&)> Host::on_speed_change;
35 Host* Host::set_netpoint(kernel::routing::NetPoint* netpoint)
37 pimpl_netpoint_ = netpoint;
43 if (pimpl_netpoint_ != nullptr) // not removed yet by a children class
44 Engine::get_instance()->netpoint_unregister(pimpl_netpoint_);
48 /** @brief Fire the required callbacks and destroy the object
50 * Don't delete directly a host, call h->destroy() instead.
52 * This is cumbersome but this is the simplest solution to ensure that the on_destruction() callback receives a valid
53 * object (because of the destructor order in a class hierarchy).
57 kernel::actor::simcall([this] { this->pimpl_->destroy(); });
60 Host* Host::by_name(const std::string& name)
62 return Engine::get_instance()->host_by_name(name);
64 Host* Host::by_name_or_null(const std::string& name)
66 return Engine::get_instance()->host_by_name_or_null(name);
71 kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
73 xbt_die("Cannot call Host::current() from the maestro context");
74 return self->get_host();
77 xbt::string const& Host::get_name() const
79 return this->pimpl_->get_name();
82 const char* Host::get_cname() const
84 return this->pimpl_->get_cname();
90 kernel::actor::simcall([this] {
91 this->pimpl_cpu->turn_on();
92 this->pimpl_->turn_on();
93 on_state_change(*this);
98 /** @brief Stop the host if it is on */
102 const kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
103 kernel::actor::simcall([this, self] {
104 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
105 if (vm->get_pm() == this) {
109 this->pimpl_cpu->turn_off();
110 this->pimpl_->turn_off(self);
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() const
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() const
140 return pimpl_->get_actor_count();
144 * @brief Find a route toward another host
146 * @param dest [IN] where to
147 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
148 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
149 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
150 * @pre links!=nullptr
152 * walk through the routing components tree and find a route between hosts
153 * by calling each "get_route" function in each routing component.
155 void Host::route_to(const Host* dest, std::vector<Link*>& links, double* latency) const
157 std::vector<kernel::resource::LinkImpl*> linkImpls;
158 this->route_to(dest, linkImpls, latency);
159 for (auto* l : linkImpls)
160 links.push_back(l->get_iface());
163 /** @brief Just like Host::routeTo, but filling an array of link implementations */
164 void Host::route_to(const Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency) const
166 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint_, dest->get_netpoint(), links, latency);
167 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
168 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
169 (latency == nullptr ? -1 : *latency));
170 for (auto const* link : links)
171 XBT_CDEBUG(surf_route, " Link '%s'", link->get_cname());
175 /** @brief Returns the networking zone englobing that host */
176 NetZone* Host::get_englobing_zone()
178 return pimpl_netpoint_->get_englobing_zone()->get_iface();
181 void Host::sendto(Host* dest, double byte_amount) // deprecated 331
183 Comm::sendto_async(this, dest, byte_amount)->wait();
186 CommPtr Host::sendto_async(Host* dest, double byte_amount) // deprecated 331
188 return Comm::sendto_async(this, dest, byte_amount);
191 void Host::send_to(Host* dest, double byte_amount) // deprecated 330
193 Comm::sendto(this, dest, byte_amount);
196 /** Get the properties assigned to a host */
197 const std::unordered_map<std::string, std::string>* Host::get_properties() const
199 return this->pimpl_->get_properties();
202 /** Retrieve the property value (or nullptr if not set) */
203 const char* Host::get_property(const std::string& key) const
205 return this->pimpl_->get_property(key);
208 Host* Host::set_property(const std::string& key, const std::string& value)
210 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
214 Host* Host::set_properties(const std::unordered_map<std::string, std::string>& properties)
216 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
220 /** Specify a profile turning the host on and off according to an exhaustive list or a stochastic law.
221 * The profile must contain boolean values. */
222 Host* Host::set_state_profile(kernel::profile::Profile* p)
224 kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
227 /** Specify a profile modeling the external load according to an exhaustive list or a stochastic law.
229 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
230 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
231 * at this pstate level) by the rate coming from the profile.
233 Host* Host::set_speed_profile(kernel::profile::Profile* p)
235 kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
239 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
240 double Host::get_pstate_speed(int pstate_index) const
242 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
245 double Host::get_speed() const
247 return this->pimpl_cpu->get_speed(1.0);
249 double Host::get_load() const
251 return this->pimpl_cpu->get_load();
253 double Host::get_available_speed() const
255 return this->pimpl_cpu->get_speed_ratio();
258 int Host::get_core_count() const
260 return this->pimpl_cpu->get_core_count();
263 Host* Host::set_core_count(int core_count)
265 kernel::actor::simcall([this, core_count] { this->pimpl_cpu->set_core_count(core_count); });
269 Host* Host::set_pstate_speed(const std::vector<double>& speed_per_state)
271 kernel::actor::simcall([this, &speed_per_state] { pimpl_cpu->set_pstate_speed(speed_per_state); });
275 Host* Host::set_pstate_speed(const std::vector<std::string>& speed_per_state)
277 std::vector<double> speed_list(speed_per_state.size());
278 for (const auto& speed_str : speed_per_state) {
280 double speed = xbt_parse_get_speed("", 0, speed_str.c_str(), nullptr, "");
281 speed_list.push_back(speed);
282 } catch (const simgrid::ParseError&) {
283 xbt_die("Host(%s): Impossible to set_pstate_speed, invalid speed %s", get_cname(), speed_str.c_str());
286 set_pstate_speed(speed_list);
290 /** @brief Set the pstate at which the host should run */
291 Host* Host::set_pstate(int pstate_index)
293 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
297 /** @brief Retrieve the pstate at which the host is currently running */
298 int Host::get_pstate() const
300 return this->pimpl_cpu->get_pstate();
303 std::vector<Disk*> Host::get_disks() const
305 return this->pimpl_->get_disks();
308 Disk* Host::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
311 this->get_netpoint()->get_englobing_zone()->get_disk_model()->create_disk(name, read_bandwidth, write_bandwidth);
312 return disk->set_host(this)->get_iface();
315 void Host::add_disk(const Disk* disk)
317 kernel::actor::simcall([this, disk] { this->pimpl_->add_disk(disk); });
320 void Host::remove_disk(const std::string& disk_name)
322 kernel::actor::simcall([this, disk_name] { this->pimpl_->remove_disk(disk_name); });
325 ExecPtr Host::exec_init(double flops) const
327 return this_actor::exec_init(flops);
330 ExecPtr Host::exec_async(double flops) const
332 return this_actor::exec_async(flops);
335 void Host::execute(double flops) const
337 execute(flops, 1.0 /* priority */);
340 void Host::execute(double flops, double priority) const
342 this_actor::exec_init(flops)->set_priority(1 / priority)->vetoable_start()->wait();
346 } // namespace simgrid
348 /* **************************** Public C interface *************************** */
349 size_t sg_host_count()
351 return simgrid::s4u::Engine::get_instance()->get_host_count();
353 sg_host_t* sg_host_list()
355 const simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
356 size_t host_count = e->get_host_count();
358 xbt_assert(host_count > 0, "There is no host!");
359 std::vector<simgrid::s4u::Host*> hosts = e->get_all_hosts();
361 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
362 std::copy(begin(hosts), end(hosts), res);
367 const char* sg_host_get_name(const_sg_host_t host)
369 return host->get_cname();
372 void* sg_host_extension_get(const_sg_host_t host, size_t ext)
374 return host->extension(ext);
377 size_t sg_host_extension_create(void (*deleter)(void*))
379 return simgrid::s4u::Host::extension_create(deleter);
382 sg_host_t sg_host_by_name(const char* name)
384 return simgrid::s4u::Host::by_name_or_null(name);
387 xbt_dynar_t sg_hosts_as_dynar() // XBT_ATTRIB_DEPRECATED_v330
389 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
391 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
392 return not host || not host->get_netpoint() || not host->get_netpoint()->is_host();
394 std::sort(begin(list), last,
395 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
397 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
398 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
402 // ========= Layering madness ==============*
404 // ========== User data Layer ==========
405 void* sg_host_get_data(const_sg_host_t host)
407 return host->get_data();
409 void sg_host_set_data(sg_host_t host, void* userdata)
411 host->set_data(userdata);
413 void* sg_host_data(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
415 return sg_host_get_data(host);
417 void sg_host_data_set(sg_host_t host, void* userdata) // XBT_ATTRIB_DEPRECATED_v330
419 sg_host_set_data(host, userdata);
422 // ========= Disk related functions ============
423 void sg_host_get_disks(const_sg_host_t host, unsigned int* disk_count, sg_disk_t** disks)
425 std::vector<sg_disk_t> list = host->get_disks();
426 *disk_count = list.size();
427 *disks = xbt_new(sg_disk_t, list.size());
428 std::copy(begin(list), end(list), *disks);
431 // =========== user-level functions ===============
432 // ================================================
433 /** @brief Returns the total speed of a host */
434 double sg_host_get_speed(const_sg_host_t host)
436 return host->get_speed();
439 double sg_host_speed(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
441 return sg_host_get_speed(host);
444 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
446 * @param host host to test
447 * @param pstate_index pstate to test
448 * @return Returns the processor speed associated with pstate_index
450 double sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
452 return host->get_pstate_speed(pstate_index);
455 /** @ingroup m_host_management
456 * @brief Return the number of cores.
459 * @return the number of cores
461 int sg_host_core_count(const_sg_host_t host)
463 return host->get_core_count();
466 double sg_host_get_available_speed(const_sg_host_t host)
468 return host->get_available_speed();
471 /** @brief Returns the number of power states for a host.
473 * See also @ref plugin_energy.
475 int sg_host_get_nb_pstates(const_sg_host_t host)
477 return host->get_pstate_count();
480 /** @brief Gets the pstate at which that host currently runs.
482 * See also @ref plugin_energy.
484 int sg_host_get_pstate(const_sg_host_t host)
486 return host->get_pstate();
488 /** @brief Sets the pstate at which that host should run.
490 * See also @ref plugin_energy.
492 void sg_host_set_pstate(sg_host_t host, int pstate)
494 host->set_pstate(pstate);
497 /** @ingroup m_host_management
499 * @brief Start the host if it is off
501 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
502 * for more info on DVFS.
504 void sg_host_turn_on(sg_host_t host)
509 /** @ingroup m_host_management
511 * @brief Stop the host if it is on
513 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
514 * for more info on DVFS.
516 void sg_host_turn_off(sg_host_t host)
521 /** @ingroup m_host_management
522 * @brief Determine if a host is up and running.
524 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
527 * @param host host to test
528 * @return Returns true if the host is up and running, and false if it's currently down
530 int sg_host_is_on(const_sg_host_t host)
532 return host->is_on();
535 /** @brief Get the properties of a host */
536 xbt_dict_t sg_host_get_properties(const_sg_host_t host)
538 const std::unordered_map<std::string, std::string>* props = host->get_properties();
539 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
541 if (props == nullptr)
543 for (auto const& elm : *props) {
544 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()));
549 /** @ingroup m_host_management
550 * @brief Returns the value of a given host property
553 * @param name a property name
554 * @return value of a property (or nullptr if property not set)
556 const char* sg_host_get_property_value(const_sg_host_t host, const char* name)
558 return host->get_property(name);
561 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
563 host->set_property(name, value);
567 * @brief Find a route between two hosts
569 * @param from where from
571 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
573 void sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
575 std::vector<simgrid::s4u::Link*> vlinks;
576 from->route_to(to, vlinks, nullptr);
577 for (auto const& link : vlinks)
578 xbt_dynar_push(links, &link);
581 * @brief Find the latency of the route between two hosts
583 * @param from where from
586 double sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
588 std::vector<simgrid::s4u::Link*> vlinks;
590 from->route_to(to, vlinks, &res);
594 * @brief Find the bandwidth of the route between two hosts
596 * @param from where from
599 double sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
601 double min_bandwidth = -1.0;
603 std::vector<simgrid::s4u::Link*> vlinks;
604 from->route_to(to, vlinks, nullptr);
605 for (auto const& link : vlinks) {
606 double bandwidth = link->get_bandwidth();
607 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
608 min_bandwidth = bandwidth;
610 return min_bandwidth;
613 void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links) // XBT_ATTRIB_DEPRECATED_v330
615 sg_host_get_route(from, to, links);
618 double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
620 return sg_host_get_route_latency(from, to);
623 double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
625 return sg_host_get_route_bandwidth(from, to);
628 void sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
630 simgrid::s4u::Comm::sendto(from, to, byte_amount);
633 /** @brief Displays debugging information about a host */
634 void sg_host_dump(const_sg_host_t host)
636 XBT_INFO("Displaying host %s", host->get_cname());
637 XBT_INFO(" - speed: %.0f", host->get_speed());
638 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
639 const std::unordered_map<std::string, std::string>* props = host->get_properties();
641 if (not props->empty()) {
642 XBT_INFO(" - properties:");
643 for (auto const& elm : *props) {
644 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
649 /** @brief Return the list of actors attached to a host.
652 * @param whereto a dynar in which we should push actors living on that host
654 void sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
656 auto const actors = host->get_all_actors();
657 for (auto const& actor : actors)
658 xbt_dynar_push(whereto, &actor);
661 sg_host_t sg_host_self()
663 return SIMIX_is_maestro() ? nullptr : simgrid::kernel::actor::ActorImpl::self()->get_host();
666 /* needs to be public and without simcall for exceptions and logging events */
667 const char* sg_host_self_get_name()
669 const char* res = "";
670 if (not SIMIX_is_maestro()) {
671 const simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
673 res = host->get_cname();
678 double sg_host_get_load(const_sg_host_t host)
680 return host->get_load();
683 double sg_host_load(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
685 return sg_host_get_load(host);