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();
80 kernel::actor::simcall([this] {
81 this->pimpl_cpu->turn_on();
82 this->pimpl_->turn_on();
83 on_state_change(*this);
88 /** @brief Stop the host if it is on */
92 const kernel::actor::ActorImpl* self = kernel::actor::ActorImpl::self();
93 kernel::actor::simcall([this, self] {
94 for (VirtualMachine* const& vm : vm::VirtualMachineImpl::allVms_)
95 if (vm->get_pm() == this) {
99 this->pimpl_cpu->turn_off();
100 this->pimpl_->turn_off(self);
102 on_state_change(*this);
107 bool Host::is_on() const
109 return this->pimpl_cpu->is_on();
112 int Host::get_pstate_count() const
114 return this->pimpl_cpu->get_pstate_count();
118 * @brief Return a copy of the list of actors that are executing on this host.
120 * Daemons and regular actors are all mixed in this list.
122 std::vector<ActorPtr> Host::get_all_actors() const
124 return pimpl_->get_all_actors();
127 /** @brief Returns how many actors (daemonized or not) have been launched on this host */
128 int Host::get_actor_count() const
130 return pimpl_->get_actor_count();
134 * @brief Find a route toward another host
136 * @param dest [IN] where to
137 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
138 * @param latency [OUT] where to store the latency experienced on the path (or nullptr if not interested)
139 * It is the caller responsibility to initialize latency to 0 (we add to provided route)
140 * @pre links!=nullptr
142 * walk through the routing components tree and find a route between hosts
143 * by calling each "get_route" function in each routing component.
145 void Host::route_to(const Host* dest, std::vector<Link*>& links, double* latency) const
147 std::vector<kernel::resource::LinkImpl*> linkImpls;
148 this->route_to(dest, linkImpls, latency);
149 for (auto* l : linkImpls)
150 links.push_back(l->get_iface());
153 /** @brief Just like Host::routeTo, but filling an array of link implementations */
154 void Host::route_to(const Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency) const
156 kernel::routing::NetZoneImpl::get_global_route(pimpl_netpoint_, dest->get_netpoint(), links, latency);
157 if (XBT_LOG_ISENABLED(surf_route, xbt_log_priority_debug)) {
158 XBT_CDEBUG(surf_route, "Route from '%s' to '%s' (latency: %f):", get_cname(), dest->get_cname(),
159 (latency == nullptr ? -1 : *latency));
160 for (auto const* link : links)
161 XBT_CDEBUG(surf_route, " Link '%s'", link->get_cname());
165 /** @brief Returns the networking zone englobing that host */
166 NetZone* Host::get_englobing_zone()
168 return pimpl_netpoint_->get_englobing_zone()->get_iface();
171 void Host::sendto(Host* dest, double byte_amount) // deprecated 331
173 Comm::sendto_async(this, dest, byte_amount)->wait();
176 CommPtr Host::sendto_async(Host* dest, double byte_amount) // deprecated 331
178 return Comm::sendto_async(this, dest, byte_amount);
181 void Host::send_to(Host* dest, double byte_amount) // deprecated 330
183 Comm::sendto(this, dest, byte_amount);
186 /** Get the properties assigned to a host */
187 const std::unordered_map<std::string, std::string>* Host::get_properties() const
189 return this->pimpl_->get_properties();
192 /** Retrieve the property value (or nullptr if not set) */
193 const char* Host::get_property(const std::string& key) const
195 return this->pimpl_->get_property(key);
198 Host* Host::set_property(const std::string& key, const std::string& value)
200 kernel::actor::simcall([this, &key, &value] { this->pimpl_->set_property(key, value); });
204 Host* Host::set_properties(const std::unordered_map<std::string, std::string>& properties)
206 kernel::actor::simcall([this, &properties] { this->pimpl_->set_properties(properties); });
210 /** Specify a profile turning the host on and off according to an exhaustive list or a stochastic law.
211 * The profile must contain boolean values. */
212 Host* Host::set_state_profile(kernel::profile::Profile* p)
214 kernel::actor::simcall([this, p] { pimpl_cpu->set_state_profile(p); });
217 /** Specify a profile modeling the external load according to an exhaustive list or a stochastic law.
219 * Each event of the profile represent a peak speed change that is due to external load. The values are given as a rate
220 * of the initial value. This means that the actual value is obtained by multiplying the initial value (the peek speed
221 * at this pstate level) by the rate coming from the profile.
223 Host* Host::set_speed_profile(kernel::profile::Profile* p)
225 kernel::actor::simcall([this, p] { pimpl_cpu->set_speed_profile(p); });
229 /** @brief Get the peak processor speed (in flops/s), at the specified pstate */
230 double Host::get_pstate_speed(int pstate_index) const
232 return this->pimpl_cpu->get_pstate_peak_speed(pstate_index);
235 double Host::get_speed() const
237 return this->pimpl_cpu->get_speed(1.0);
239 double Host::get_load() const
241 return this->pimpl_cpu->get_load();
243 double Host::get_available_speed() const
245 return this->pimpl_cpu->get_speed_ratio();
248 int Host::get_core_count() const
250 return this->pimpl_cpu->get_core_count();
253 Host* Host::set_core_count(int core_count)
255 kernel::actor::simcall([this, core_count] { this->pimpl_cpu->set_core_count(core_count); });
259 Host* Host::set_pstate_speed(const std::vector<double>& speed_per_state)
261 kernel::actor::simcall([this, &speed_per_state] { pimpl_cpu->set_pstate_speed(speed_per_state); });
265 Host* Host::set_pstate_speed(const std::vector<std::string>& speed_per_state)
267 std::vector<double> speed_list(speed_per_state.size());
268 for (const auto& speed_str : speed_per_state) {
270 double speed = xbt_parse_get_speed("", 0, speed_str.c_str(), nullptr, "");
271 speed_list.push_back(speed);
272 } catch (const simgrid::ParseError& e) {
273 xbt_die("Host(%s): Impossible to set_pstate_speed, invalid speed %s", get_cname(), speed_str.c_str());
276 set_pstate_speed(speed_list);
280 /** @brief Set the pstate at which the host should run */
281 Host* Host::set_pstate(int pstate_index)
283 kernel::actor::simcall([this, pstate_index] { this->pimpl_cpu->set_pstate(pstate_index); });
287 /** @brief Retrieve the pstate at which the host is currently running */
288 int Host::get_pstate() const
290 return this->pimpl_cpu->get_pstate();
293 std::vector<Disk*> Host::get_disks() const
295 return this->pimpl_->get_disks();
298 Disk* Host::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
301 this->get_netpoint()->get_englobing_zone()->get_disk_model()->create_disk(name, read_bandwidth, write_bandwidth);
302 return disk->set_host(this)->get_iface();
305 void Host::add_disk(const Disk* disk)
307 kernel::actor::simcall([this, disk] { this->pimpl_->add_disk(disk); });
310 void Host::remove_disk(const std::string& disk_name)
312 kernel::actor::simcall([this, disk_name] { this->pimpl_->remove_disk(disk_name); });
315 ExecPtr Host::exec_init(double flops) const
317 return this_actor::exec_init(flops);
320 ExecPtr Host::exec_async(double flops) const
322 return this_actor::exec_async(flops);
325 void Host::execute(double flops) const
327 execute(flops, 1.0 /* priority */);
330 void Host::execute(double flops, double priority) const
332 this_actor::exec_init(flops)->set_priority(1 / priority)->vetoable_start()->wait();
336 } // namespace simgrid
338 /* **************************** Public C interface *************************** */
339 size_t sg_host_count()
341 return simgrid::s4u::Engine::get_instance()->get_host_count();
343 sg_host_t* sg_host_list()
345 const simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
346 size_t host_count = e->get_host_count();
348 xbt_assert(host_count > 0, "There is no host!");
349 std::vector<simgrid::s4u::Host*> hosts = e->get_all_hosts();
351 sg_host_t* res = xbt_new(sg_host_t, hosts.size());
352 std::copy(begin(hosts), end(hosts), res);
357 const char* sg_host_get_name(const_sg_host_t host)
359 return host->get_cname();
362 void* sg_host_extension_get(const_sg_host_t host, size_t ext)
364 return host->extension(ext);
367 size_t sg_host_extension_create(void (*deleter)(void*))
369 return simgrid::s4u::Host::extension_create(deleter);
372 sg_host_t sg_host_by_name(const char* name)
374 return simgrid::s4u::Host::by_name_or_null(name);
377 xbt_dynar_t sg_hosts_as_dynar() // XBT_ATTRIB_DEPRECATED_v330
379 std::vector<simgrid::s4u::Host*> list = simgrid::s4u::Engine::get_instance()->get_all_hosts();
381 auto last = std::remove_if(begin(list), end(list), [](const simgrid::s4u::Host* host) {
382 return not host || not host->get_netpoint() || not host->get_netpoint()->is_host();
384 std::sort(begin(list), last,
385 [](const simgrid::s4u::Host* a, const simgrid::s4u::Host* b) { return a->get_name() < b->get_name(); });
387 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t), nullptr);
388 std::for_each(begin(list), last, [res](sg_host_t host) { xbt_dynar_push_as(res, sg_host_t, host); });
392 // ========= Layering madness ==============*
394 // ========== User data Layer ==========
395 void* sg_host_get_data(const_sg_host_t host)
397 return host->get_data();
399 void sg_host_set_data(sg_host_t host, void* userdata)
401 host->set_data(userdata);
403 void* sg_host_data(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
405 return sg_host_get_data(host);
407 void sg_host_data_set(sg_host_t host, void* userdata) // XBT_ATTRIB_DEPRECATED_v330
409 sg_host_set_data(host, userdata);
412 // ========= Disk related functions ============
413 void sg_host_get_disks(const_sg_host_t host, unsigned int* disk_count, sg_disk_t** disks)
415 std::vector<sg_disk_t> list = host->get_disks();
416 *disk_count = list.size();
417 *disks = xbt_new(sg_disk_t, list.size());
418 std::copy(begin(list), end(list), *disks);
421 // =========== user-level functions ===============
422 // ================================================
423 /** @brief Returns the total speed of a host */
424 double sg_host_get_speed(const_sg_host_t host)
426 return host->get_speed();
429 double sg_host_speed(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
431 return sg_host_get_speed(host);
434 /** @brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref plugin_energy.
436 * @param host host to test
437 * @param pstate_index pstate to test
438 * @return Returns the processor speed associated with pstate_index
440 double sg_host_get_pstate_speed(const_sg_host_t host, int pstate_index)
442 return host->get_pstate_speed(pstate_index);
445 /** @ingroup m_host_management
446 * @brief Return the number of cores.
449 * @return the number of cores
451 int sg_host_core_count(const_sg_host_t host)
453 return host->get_core_count();
456 double sg_host_get_available_speed(const_sg_host_t host)
458 return host->get_available_speed();
461 /** @brief Returns the number of power states for a host.
463 * See also @ref plugin_energy.
465 int sg_host_get_nb_pstates(const_sg_host_t host)
467 return host->get_pstate_count();
470 /** @brief Gets the pstate at which that host currently runs.
472 * See also @ref plugin_energy.
474 int sg_host_get_pstate(const_sg_host_t host)
476 return host->get_pstate();
478 /** @brief Sets the pstate at which that host should run.
480 * See also @ref plugin_energy.
482 void sg_host_set_pstate(sg_host_t host, int pstate)
484 host->set_pstate(pstate);
487 /** @ingroup m_host_management
489 * @brief Start the host if it is off
491 * See also #sg_host_is_on() to test the current state of the host and @ref plugin_energy
492 * for more info on DVFS.
494 void sg_host_turn_on(sg_host_t host)
499 /** @ingroup m_host_management
501 * @brief Stop the host if it is on
503 * See also #MSG_host_is_on() to test the current state of the host and @ref plugin_energy
504 * for more info on DVFS.
506 void sg_host_turn_off(sg_host_t host)
511 /** @ingroup m_host_management
512 * @brief Determine if a host is up and running.
514 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
517 * @param host host to test
518 * @return Returns true if the host is up and running, and false if it's currently down
520 int sg_host_is_on(const_sg_host_t host)
522 return host->is_on();
525 /** @brief Get the properties of a host */
526 xbt_dict_t sg_host_get_properties(const_sg_host_t host)
528 const std::unordered_map<std::string, std::string>* props = host->get_properties();
529 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
531 if (props == nullptr)
533 for (auto const& elm : *props) {
534 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()));
539 /** @ingroup m_host_management
540 * @brief Returns the value of a given host property
543 * @param name a property name
544 * @return value of a property (or nullptr if property not set)
546 const char* sg_host_get_property_value(const_sg_host_t host, const char* name)
548 return host->get_property(name);
551 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
553 host->set_property(name, value);
557 * @brief Find a route between two hosts
559 * @param from where from
561 * @param links [OUT] where to store the list of links (must exist, cannot be nullptr).
563 void sg_host_get_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links)
565 std::vector<simgrid::s4u::Link*> vlinks;
566 from->route_to(to, vlinks, nullptr);
567 for (auto const& link : vlinks)
568 xbt_dynar_push(links, &link);
571 * @brief Find the latency of the route between two hosts
573 * @param from where from
576 double sg_host_get_route_latency(const_sg_host_t from, const_sg_host_t to)
578 std::vector<simgrid::s4u::Link*> vlinks;
580 from->route_to(to, vlinks, &res);
584 * @brief Find the bandwidth of the route between two hosts
586 * @param from where from
589 double sg_host_get_route_bandwidth(const_sg_host_t from, const_sg_host_t to)
591 double min_bandwidth = -1.0;
593 std::vector<simgrid::s4u::Link*> vlinks;
594 from->route_to(to, vlinks, nullptr);
595 for (auto const& link : vlinks) {
596 double bandwidth = link->get_bandwidth();
597 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
598 min_bandwidth = bandwidth;
600 return min_bandwidth;
603 void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links) // XBT_ATTRIB_DEPRECATED_v330
605 sg_host_get_route(from, to, links);
608 double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
610 return sg_host_get_route_latency(from, to);
613 double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to) // XBT_ATTRIB_DEPRECATED_v330
615 return sg_host_get_route_bandwidth(from, to);
618 void sg_host_sendto(sg_host_t from, sg_host_t to, double byte_amount)
620 simgrid::s4u::Comm::sendto(from, to, byte_amount);
623 /** @brief Displays debugging information about a host */
624 void sg_host_dump(const_sg_host_t host)
626 XBT_INFO("Displaying host %s", host->get_cname());
627 XBT_INFO(" - speed: %.0f", host->get_speed());
628 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
629 const std::unordered_map<std::string, std::string>* props = host->get_properties();
631 if (not props->empty()) {
632 XBT_INFO(" - properties:");
633 for (auto const& elm : *props) {
634 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());
639 /** @brief Return the list of actors attached to a host.
642 * @param whereto a dynar in which we should push actors living on that host
644 void sg_host_get_actor_list(const_sg_host_t host, xbt_dynar_t whereto)
646 auto const actors = host->get_all_actors();
647 for (auto const& actor : actors)
648 xbt_dynar_push(whereto, &actor);
651 sg_host_t sg_host_self()
653 return SIMIX_is_maestro() ? nullptr : simgrid::kernel::actor::ActorImpl::self()->get_host();
656 /* needs to be public and without simcall for exceptions and logging events */
657 const char* sg_host_self_get_name()
659 const char* res = "";
660 if (not SIMIX_is_maestro()) {
661 const simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
663 res = host->get_cname();
668 double sg_host_get_load(const_sg_host_t host)
670 return host->get_load();
673 double sg_host_load(const_sg_host_t host) // XBT_ATTRIB_DEPRECATED_v330
675 return sg_host_get_load(host);