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();
72 xbt_assert(self != nullptr, "Cannot call Host::current() from the maestro context");
73 return self->get_host();
76 xbt::string const& Host::get_name() const
78 return this->pimpl_->get_name();
81 const char* Host::get_cname() const
83 return this->pimpl_->get_cname();
89 kernel::actor::simcall([this] {
90 this->pimpl_cpu->turn_on();
91 this->pimpl_->turn_on();
92 on_state_change(*this);
97 /** @brief Stop the host if it is on */
101 const kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
102 kernel::actor::simcall([this, self] {
103 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
104 if (vm->get_pm() == this) {
108 this->pimpl_cpu->turn_off();
109 this->pimpl_->turn_off(self);
111 on_state_change(*this);
116 bool Host::is_on() const
118 return this->pimpl_cpu->is_on();
121 int Host::get_pstate_count() const
123 return this->pimpl_cpu->get_pstate_count();
127 * @brief Return a copy of the list of actors that are executing on this host.
129 * Daemons and regular actors are all mixed in this list.
131 std::vector<ActorPtr> Host::get_all_actors() const
133 return pimpl_->get_all_actors();
136 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
137 int Host::get_actor_count() const
139 return pimpl_->get_actor_count();
143 * @brief Find a route toward another host
145 * @param dest [IN] where to
146 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
147 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
148 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
149 * @pre links!=nullptr
151 * walk through the routing components tree and find a route between hosts
152 * by calling each "get_route" function in each routing component.
154 void Host::route_to(const Host* dest, std::vector<Link*>& links, double* latency) const
156 std::vector<kernel::resource::LinkImpl*> linkImpls;
157 this->route_to(dest, linkImpls, latency);
158 for (auto* l : linkImpls)
159 links.push_back(l->get_iface());
162 /** @brief Just like Host::routeTo, but filling an array of link implementations */
163 void Host::route_to(const Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency) const
165 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint_, dest->get_netpoint(), links, latency);
166 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
167 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
168 (latency == nullptr ? -1 : *latency));
169 for (auto const* link : links)
170 XBT_CDEBUG(surf_route, " Link '%s'", link->get_cname());
174 /** @brief Returns the networking zone englobing that host */
175 NetZone* Host::get_englobing_zone()
177 return pimpl_netpoint_->get_englobing_zone()->get_iface();
180 void Host::sendto(Host* dest, double byte_amount) // deprecated 331
182 Comm::sendto_async(this, dest, byte_amount)->wait();
185 CommPtr Host::sendto_async(Host* dest, double byte_amount) // deprecated 331
187 return Comm::sendto_async(this, dest, byte_amount);
190 void Host::send_to(Host* dest, double byte_amount) // deprecated 330
192 Comm::sendto(this, dest, byte_amount);
195 /** Get the properties assigned to a host */
196 const std::unordered_map<std::string, std::string>* Host::get_properties() const
198 return this->pimpl_->get_properties();
201 /** Retrieve the property value (or nullptr if not set) */
202 const char* Host::get_property(const std::string& key) const
204 return this->pimpl_->get_property(key);
207 Host* Host::set_property(const std::string& key, const std::string& value)
209 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
213 Host* Host::set_properties(const std::unordered_map<std::string, std::string>& properties)
215 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
219 /** Specify a profile turning the host on and off according to an exhaustive list or a stochastic law.
220 * The profile must contain boolean values. */
221 Host* Host::set_state_profile(kernel::profile::Profile* p)
223 kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
226 /** Specify a profile modeling the external load according to an exhaustive list or a stochastic law.
228 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
229 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
230 * at this pstate level) by the rate coming from the profile.
232 Host* Host::set_speed_profile(kernel::profile::Profile* p)
234 kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
238 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
239 double Host::get_pstate_speed(int pstate_index) const
241 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
244 double Host::get_speed() const
246 return this->pimpl_cpu->get_speed(1.0);
248 double Host::get_load() const
250 return this->pimpl_cpu->get_load();
252 double Host::get_available_speed() const
254 return this->pimpl_cpu->get_speed_ratio();
257 int Host::get_core_count() const
259 return this->pimpl_cpu->get_core_count();
262 Host* Host::set_core_count(int core_count)
264 kernel::actor::simcall([this, core_count] { this->pimpl_cpu->set_core_count(core_count); });
268 Host* Host::set_pstate_speed(const std::vector<double>& speed_per_state)
270 kernel::actor::simcall([this, &speed_per_state] { pimpl_cpu->set_pstate_speed(speed_per_state); });
274 std::vector<double> Host::convert_pstate_speed_vector(const std::vector<std::string>& speed_per_state)
276 std::vector<double> speed_list;
277 speed_list.reserve(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: Impossible to set_pstate_speed, invalid speed %s", speed_str.c_str());
289 Host* Host::set_pstate_speed(const std::vector<std::string>& speed_per_state)
291 set_pstate_speed(Host::convert_pstate_speed_vector(speed_per_state));
295 /** @brief Set the pstate at which the host should run */
296 Host* Host::set_pstate(int pstate_index)
298 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
302 /** @brief Retrieve the pstate at which the host is currently running */
303 int Host::get_pstate() const
305 return this->pimpl_cpu->get_pstate();
308 std::vector<Disk*> Host::get_disks() const
310 return this->pimpl_->get_disks();
313 Disk* Host::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
316 this->get_netpoint()->get_englobing_zone()->get_disk_model()->create_disk(name, read_bandwidth, write_bandwidth);
317 return disk->set_host(this)->get_iface();
320 void Host::add_disk(const Disk* disk)
322 kernel::actor::simcall([this, disk] { this->pimpl_->add_disk(disk); });
325 void Host::remove_disk(const std::string& disk_name)
327 kernel::actor::simcall([this, disk_name] { this->pimpl_->remove_disk(disk_name); });
330 ExecPtr Host::exec_init(double flops) const
332 return this_actor::exec_init(flops);
335 ExecPtr Host::exec_async(double flops) const
337 return this_actor::exec_async(flops);
340 void Host::execute(double flops) const
342 execute(flops, 1.0 /* priority */);
345 void Host::execute(double flops, double priority) const
347 this_actor::exec_init(flops)->set_priority(1 / priority)->vetoable_start()->wait();
352 kernel::actor::simcall([this]() { this->pimpl_cpu->seal(); });
353 kernel::actor::simcall([this]() { this->pimpl_->seal(); });
357 } // namespace simgrid
359 /* **************************** Public C interface *************************** */
360 size_t sg_host_count()
362 return simgrid::s4u::Engine::get_instance()->get_host_count();
364 sg_host_t* sg_host_list()
366 const simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
367 size_t host_count = e->get_host_count();
369 xbt_assert(host_count > 0, "There is no host!");
370 std::vector<simgrid::s4u::Host*> hosts = e->get_all_hosts();
372 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
373 std::copy(begin(hosts), end(hosts), res);
378 const char* sg_host_get_name(const_sg_host_t host)
380 return host->get_cname();
383 void* sg_host_extension_get(const_sg_host_t host, size_t ext)
385 return host->extension(ext);
388 size_t sg_host_extension_create(void (*deleter)(void*))
390 return simgrid::s4u::Host::extension_create(deleter);
393 sg_host_t sg_host_by_name(const char* name)
395 return simgrid::s4u::Host::by_name_or_null(name);
398 xbt_dynar_t sg_hosts_as_dynar() // XBT_ATTRIB_DEPRECATED_v330
400 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
402 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
403 return not host || not host->get_netpoint() || not host->get_netpoint()->is_host();
405 std::sort(begin(list), last,
406 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
408 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
409 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
413 // ========= Layering madness ==============*
415 // ========== User data Layer ==========
416 void* sg_host_get_data(const_sg_host_t host)
418 return host->get_data();
420 void sg_host_set_data(sg_host_t host, void* userdata)
422 host->set_data(userdata);
424 void* sg_host_data(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
426 return sg_host_get_data(host);
428 void sg_host_data_set(sg_host_t host, void* userdata) // XBT_ATTRIB_DEPRECATED_v330
430 sg_host_set_data(host, userdata);
433 // ========= Disk related functions ============
434 void sg_host_get_disks(const_sg_host_t host, unsigned int* disk_count, sg_disk_t** disks)
436 std::vector<sg_disk_t> list = host->get_disks();
437 *disk_count = list.size();
438 *disks = xbt_new(sg_disk_t, list.size());
439 std::copy(begin(list), end(list), *disks);
442 // =========== user-level functions ===============
443 // ================================================
444 /** @brief Returns the total speed of a host */
445 double sg_host_get_speed(const_sg_host_t host)
447 return host->get_speed();
450 double sg_host_speed(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
452 return sg_host_get_speed(host);
455 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
457 * @param host host to test
458 * @param pstate_index pstate to test
459 * @return Returns the processor speed associated with pstate_index
461 double sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
463 return host->get_pstate_speed(pstate_index);
466 /** @ingroup m_host_management
467 * @brief Return the number of cores.
470 * @return the number of cores
472 int sg_host_core_count(const_sg_host_t host)
474 return host->get_core_count();
477 double sg_host_get_available_speed(const_sg_host_t host)
479 return host->get_available_speed();
482 /** @brief Returns the number of power states for a host.
484 * See also @ref plugin_energy.
486 int sg_host_get_nb_pstates(const_sg_host_t host)
488 return host->get_pstate_count();
491 /** @brief Gets the pstate at which that host currently runs.
493 * See also @ref plugin_energy.
495 int sg_host_get_pstate(const_sg_host_t host)
497 return host->get_pstate();
499 /** @brief Sets the pstate at which that host should run.
501 * See also @ref plugin_energy.
503 void sg_host_set_pstate(sg_host_t host, int pstate)
505 host->set_pstate(pstate);
508 /** @ingroup m_host_management
510 * @brief Start the host if it is off
512 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
513 * for more info on DVFS.
515 void sg_host_turn_on(sg_host_t host)
520 /** @ingroup m_host_management
522 * @brief Stop the host if it is on
524 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
525 * for more info on DVFS.
527 void sg_host_turn_off(sg_host_t host)
532 /** @ingroup m_host_management
533 * @brief Determine if a host is up and running.
535 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
538 * @param host host to test
539 * @return Returns true if the host is up and running, and false if it's currently down
541 int sg_host_is_on(const_sg_host_t host)
543 return host->is_on();
546 /** @brief Get the properties of a host */
547 xbt_dict_t sg_host_get_properties(const_sg_host_t host)
549 const std::unordered_map<std::string, std::string>* props = host->get_properties();
550 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
552 if (props == nullptr)
554 for (auto const& elm : *props) {
555 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()));
560 /** @ingroup m_host_management
561 * @brief Returns the value of a given host property
564 * @param name a property name
565 * @return value of a property (or nullptr if property not set)
567 const char* sg_host_get_property_value(const_sg_host_t host, const char* name)
569 return host->get_property(name);
572 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
574 host->set_property(name, value);
578 * @brief Find a route between two hosts
580 * @param from where from
582 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
584 void sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
586 std::vector<simgrid::s4u::Link*> vlinks;
587 from->route_to(to, vlinks, nullptr);
588 for (auto const& link : vlinks)
589 xbt_dynar_push(links, &link);
592 * @brief Find the latency of the route between two hosts
594 * @param from where from
597 double sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
599 std::vector<simgrid::s4u::Link*> vlinks;
601 from->route_to(to, vlinks, &res);
605 * @brief Find the bandwidth of the route between two hosts
607 * @param from where from
610 double sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
612 double min_bandwidth = -1.0;
614 std::vector<simgrid::s4u::Link*> vlinks;
615 from->route_to(to, vlinks, nullptr);
616 for (auto const& link : vlinks) {
617 double bandwidth = link->get_bandwidth();
618 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
619 min_bandwidth = bandwidth;
621 return min_bandwidth;
624 void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links) // XBT_ATTRIB_DEPRECATED_v330
626 sg_host_get_route(from, to, links);
629 double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
631 return sg_host_get_route_latency(from, to);
634 double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
636 return sg_host_get_route_bandwidth(from, to);
639 void sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
641 simgrid::s4u::Comm::sendto(from, to, byte_amount);
644 /** @brief Displays debugging information about a host */
645 void sg_host_dump(const_sg_host_t host)
647 XBT_INFO("Displaying host %s", host->get_cname());
648 XBT_INFO(" - speed: %.0f", host->get_speed());
649 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
650 const std::unordered_map<std::string, std::string>* props = host->get_properties();
652 if (not props->empty()) {
653 XBT_INFO(" - properties:");
654 for (auto const& elm : *props) {
655 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
660 /** @brief Return the list of actors attached to a host.
663 * @param whereto a dynar in which we should push actors living on that host
665 void sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
667 auto const actors = host->get_all_actors();
668 for (auto const& actor : actors)
669 xbt_dynar_push(whereto, &actor);
672 sg_host_t sg_host_self()
674 return SIMIX_is_maestro() ? nullptr : simgrid::kernel::actor::ActorImpl::self()->get_host();
677 /* needs to be public and without simcall for exceptions and logging events */
678 const char* sg_host_self_get_name()
680 const char* res = "";
681 if (not SIMIX_is_maestro()) {
682 const simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
684 res = host->get_cname();
689 double sg_host_get_load(const_sg_host_t host)
691 return host->get_load();
694 double sg_host_load(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
696 return sg_host_get_load(host);