1 /* Copyright (c) 2006-2019. 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 #ifndef SIMGRID_S4U_HOST_HPP
7 #define SIMGRID_S4U_HOST_HPP
9 #include <simgrid/forward.h>
10 #include <xbt/Extendable.hpp>
11 #include <xbt/signal.hpp>
12 #include <xbt/string.hpp>
15 #include <unordered_map>
20 extern template class XBT_PUBLIC Extendable<simgrid::s4u::Host>;
28 * Some physical resource with computing and networking capabilities on which Actors execute.
30 * All hosts are automatically created during the call of the method
31 * @ref simgrid::s4u::Engine::load_platform().
32 * You cannot create a host yourself.
34 * You can retrieve a particular host using @ref simgrid::s4u::Host::by_name()
35 * and actors can retrieve the host on which they run using @ref simgrid::s4u::Host::current() or
36 * @ref simgrid::s4u::this_actor::get_host().
38 class XBT_PUBLIC Host : public simgrid::xbt::Extendable<Host> {
39 friend simgrid::vm::VMModel; // Use the pimpl_cpu to compute the VM sharing
40 friend simgrid::vm::VirtualMachineImpl; // creates the the pimpl_cpu
43 explicit Host(std::string name);
45 /** Host destruction logic */
50 bool currentlyDestroying_ = false;
53 /*** Called on each newly created host */
54 static simgrid::xbt::signal<void(Host&)> on_creation;
55 /*** Called just before destructing a host */
56 static simgrid::xbt::signal<void(Host&)> on_destruction;
57 /*** Called when the machine is turned on or off (called AFTER the change) */
58 static simgrid::xbt::signal<void(Host&)> on_state_change;
59 /*** Called when the speed of the machine is changed (called AFTER the change)
60 * (either because of a pstate switch or because of an external load event coming from the profile) */
61 static simgrid::xbt::signal<void(Host&)> on_speed_change;
63 virtual void destroy();
65 Host(Host const&) = delete;
66 Host& operator=(Host const&) = delete;
68 /** Retrieve a host from its name, or return nullptr */
69 static Host* by_name_or_null(std::string name);
70 /** Retrieve a host from its name, or die */
71 static s4u::Host* by_name(std::string name);
72 /** Retrieves the host on which the running actor is located */
73 static s4u::Host* current();
75 /** Retrieves the name of that host as a C++ string */
76 simgrid::xbt::string const& get_name() const { return name_; }
77 /** Retrieves the name of that host as a C string */
78 const char* get_cname() const { return name_.c_str(); }
80 int get_actor_count();
81 std::vector<ActorPtr> get_all_actors();
83 /** Turns that host on if it was previously off
85 * This call does nothing if the host is already on. If it was off, all actors which were
86 * marked 'autorestart' on that host will be restarted automatically (note that this may differ
87 * from the actors that were initially running on the host).
89 * All other Host's properties are left unchanged; in particular, the pstate is left
90 * unchanged and not reset to its initial value.
93 /** Turns that host off. All actors are forcefully stopped. */
95 /** Returns if that host is currently up and running */
97 /** Returns if that host is currently down and offline */
98 bool is_off() const { return not is_on(); }
100 const char* get_property(std::string key) const;
101 void set_property(std::string key, std::string value);
102 std::unordered_map<std::string, std::string>* get_properties();
105 /** @deprecated See Host::get_properties() */
106 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_properties()") std::map<std::string, std::string>* getProperties()
108 std::map<std::string, std::string>* res = new std::map<std::string, std::string>();
109 std::unordered_map<std::string, std::string>* props = get_properties();
110 for (auto const& kv : *props)
116 double get_speed() const;
117 double get_available_speed() const;
118 int get_core_count() const;
119 double get_load() const;
121 double get_pstate_speed(int pstate_index) const;
122 int get_pstate_count() const;
123 void set_pstate(int pstate_index);
124 int get_pstate() const;
127 /** @deprecated See Host::get_speed() */
128 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_speed() instead.") double getSpeed() { return get_speed(); }
129 /** @deprecated See Host::get_pstate_speed() */
130 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_pstate_speed() instead.") double getPstateSpeed(int pstate_index)
132 return get_pstate_speed(pstate_index);
135 std::vector<const char*> get_attached_storages() const;
136 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_attached_storages() instead.") void getAttachedStorages(
137 std::vector<const char*>* storages);
140 /** Get an associative list [mount point]->[Storage] of all local mount points.
142 * This is defined in the platform file, and cannot be modified programatically (yet).
144 std::unordered_map<std::string, Storage*> const& get_mounted_storages();
146 /** @deprecated See Host::get_mounted_storages() */
147 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_mounted_storages() instead.") std::unordered_map<std::string, Storage*> const& getMountedStorages()
149 return get_mounted_storages();
153 void route_to(Host* dest, std::vector<Link*>& links, double* latency);
154 void route_to(Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency);
156 /** Block the calling actor on an execution located on the called host
158 * It is not a problem if the actor is not located on the called host.
159 * The actor will not be migrated in this case. Such remote execution are easy in simulation.
161 void execute(double flops);
162 /** Start an asynchronous computation on that host (possibly remote) */
163 ExecPtr exec_async(double flops_amounts);
165 /** Block the calling actor on an execution located on the called host (with explicit priority) */
166 void execute(double flops, double priority);
168 // Deprecated functions
170 /** @deprecated See Host::get_name() */
171 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_name()") simgrid::xbt::string const& getName() const
175 /** @deprecated See Host::get_cname() */
176 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_cname()") const char* getCname() const { return name_.c_str(); }
177 /** @deprecated See Host::get_all_actors() */
178 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_all_actors()") void actorList(std::vector<ActorPtr>* whereto);
179 /** @deprecated See Host::get_all_actors() */
180 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_all_actors()") void getProcesses(std::vector<ActorPtr>* list);
181 /** @deprecated See Host::turn_on() */
182 XBT_ATTRIB_DEPRECATED_v323("Please use Host::turn_on()") void turnOn() { turn_on(); }
183 /** @deprecated See Host::turn_off() */
184 XBT_ATTRIB_DEPRECATED_v323("Please use Host::turn_off()") void turnOff() { turn_off(); }
185 /** @deprecated See Host::is_on() */
186 XBT_ATTRIB_DEPRECATED_v323("Please use Host::is_on()") bool isOn() { return is_on(); }
187 /** @deprecated See Host::is_off() */
188 XBT_ATTRIB_DEPRECATED_v323("Please use Host::is_off()") bool isOff() { return is_off(); }
189 /** @deprecated See Host::get_property() */
190 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_property()") const char* getProperty(const char* key)
192 return get_property(key);
194 /** @deprecated See Host::set_property() */
195 XBT_ATTRIB_DEPRECATED_v323("Please use Host::set_property()") void setProperty(std::string key, std::string value)
197 set_property(key, value);
199 /** @deprecated See Host::set_pstate() */
200 XBT_ATTRIB_DEPRECATED_v323("Please use Host::set_pstate()") void setPstate(int idx) { set_pstate(idx); }
201 /** @deprecated See Host::get_pstate() */
202 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_pstate()") int getPstate() { return get_pstate(); }
203 /** @deprecated See Host::route_to() */
204 XBT_ATTRIB_DEPRECATED_v323("Please use Host::route_to()") void routeTo(Host* dest, std::vector<Link*>& links,
207 route_to(dest, links, latency);
209 /** @deprecated See Host::route_to() */
210 XBT_ATTRIB_DEPRECATED_v323("Please use Host::route_to()") void routeTo(
211 Host* dest, std::vector<kernel::resource::LinkImpl*>& links, double* latency)
213 route_to(dest, links, latency);
215 /** @deprecated See Host::get_core_count() */
216 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_core_count()") int getCoreCount() { return get_core_count(); }
217 /** @deprecated See Host::get_pstate_count() */
218 XBT_ATTRIB_DEPRECATED_v323("Please use Host::get_pstate_count()") int getPstatesCount() const
220 return get_pstate_count();
222 #endif /* !DOXYGEN */
225 simgrid::xbt::string name_ {"noname"};
226 std::unordered_map<std::string, Storage*>* mounts_ = nullptr; // caching
230 /** DO NOT USE DIRECTLY (@todo: these should be protected, once our code is clean) */
231 surf::Cpu* pimpl_cpu = nullptr;
232 // TODO, this could be a unique_ptr
233 surf::HostImpl* pimpl_ = nullptr;
234 /** DO NOT USE DIRECTLY (@todo: these should be protected, once our code is clean) */
235 kernel::routing::NetPoint* pimpl_netpoint = nullptr;
239 } // namespace simgrid::s4u
241 extern int USER_HOST_LEVEL;
243 #endif /* SIMGRID_S4U_HOST_HPP */