1 /* Copyright (c) 2013-2019. 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_HOST_H_
7 #define SIMGRID_HOST_H_
10 #include <xbt/dynar.h>
11 #include <simgrid/forward.h>
14 /** @brief Host datatype.
16 * A <em>location</em> (or <em>host</em>) is any possible place where an actor may run. Thus it is represented as a
17 * <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running actors to
18 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local actors.
21 XBT_PUBLIC sg_host_t* sg_host_list();
23 /** @brief Return the current number of hosts. */
24 XBT_PUBLIC size_t sg_host_count();
27 * @brief Return a dynar containing all the hosts declared at a given point of time (including VMs)
28 * @remark The host order in the returned array is generally different from the host creation/declaration order in the
29 * XML platform (we use a hash table internally)
31 XBT_PUBLIC xbt_dynar_t sg_hosts_as_dynar();
33 XBT_PUBLIC size_t sg_host_extension_create(void (*deleter)(void*));
34 XBT_PUBLIC void* sg_host_extension_get(sg_host_t host, size_t rank);
36 /** @brief Finds a sg_host_t using its name.
38 * This is a name directory service
39 * @param name the name of an host.
40 * @return the corresponding host
42 XBT_PUBLIC sg_host_t sg_host_by_name(const char* name);
44 /** @brief Return the name of the #sg_host_t. */
45 XBT_PUBLIC const char* sg_host_get_name(sg_host_t host);
47 // ========== User Data ==============
48 /** @brief Return the user data of a #sg_host_t.
50 * This functions returns the user data associated to @a host if any.
52 XBT_PUBLIC void* sg_host_data(sg_host_t host);
53 XBT_ATTRIB_DEPRECATED_v328("Please use sg_host_data()") XBT_PUBLIC void* sg_host_user(sg_host_t host);
54 /** @brief Set the user data of a #sg_host_t.
56 * This functions attach @a data to @a host.
58 XBT_PUBLIC void sg_host_data_set(sg_host_t host, void* userdata);
59 XBT_ATTRIB_DEPRECATED_v328("Please use sg_host_data_set()") XBT_PUBLIC
60 void sg_host_user_set(sg_host_t host, void* userdata);
61 XBT_ATTRIB_DEPRECATED_v328("Please use sg_host_data_set(h, NULL)") XBT_PUBLIC void sg_host_user_destroy(sg_host_t host);
63 // ========= storage related functions ============
64 /** @brief Return the list of mount point names on an host.
66 * @return a dict containing all mount point on the host (mount_name => sg_storage_t)
68 XBT_PUBLIC xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host);
70 /** @brief Return the list of storages attached to an host.
72 * @return a dynar containing all storages (name) attached to the host
74 XBT_PUBLIC xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host);
76 // =========== user-level functions ===============
77 /** @brief Return the speed of the processor (in flop/s), regardless of the current load on the machine. */
78 XBT_PUBLIC double sg_host_speed(sg_host_t host);
79 XBT_PUBLIC double sg_host_get_pstate_speed(sg_host_t host, int pstate_index);
81 XBT_PUBLIC double sg_host_get_available_speed(sg_host_t host);
83 XBT_PUBLIC int sg_host_core_count(sg_host_t host);
85 /** @brief Returns the current computation load (in flops per second).
88 XBT_PUBLIC double sg_host_load(sg_host_t host);
90 /** @brief Return the location on which the current process is running. */
91 XBT_PUBLIC sg_host_t sg_host_self();
93 XBT_PUBLIC const char* sg_host_self_get_name();
95 /** @brief Return the total count of pstates defined for a host. See also @ref plugin_energy.
97 * @param host host to test
99 XBT_PUBLIC int sg_host_get_nb_pstates(sg_host_t host);
101 XBT_PUBLIC int sg_host_get_pstate(sg_host_t host);
102 XBT_PUBLIC void sg_host_set_pstate(sg_host_t host, int pstate);
104 XBT_PUBLIC void sg_host_turn_on(sg_host_t host);
105 XBT_PUBLIC void sg_host_turn_off(sg_host_t host);
106 XBT_PUBLIC int sg_host_is_on(sg_host_t host);
108 /** @ingroup m_host_management
109 * @brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
112 * @return a dict containing the properties
114 XBT_PUBLIC xbt_dict_t sg_host_get_properties(sg_host_t host);
116 /** @ingroup m_host_management
117 * @brief Returns the value of a given host property
120 * @param name a property name
121 * @return value of a property (or nullptr if property not set)
123 XBT_PUBLIC const char* sg_host_get_property_value(sg_host_t host, const char* name);
125 /** @ingroup m_host_management
126 * @brief Change the value of a given host property
129 * @param name a property name
130 * @param value what to change the property to
132 XBT_PUBLIC void sg_host_set_property_value(sg_host_t host, const char* name, const char* value);
134 XBT_PUBLIC void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links);
135 XBT_PUBLIC double sg_host_route_latency(sg_host_t from, sg_host_t to);
136 XBT_PUBLIC double sg_host_route_bandwidth(sg_host_t from, sg_host_t to);
137 void sg_host_send_to(sg_host_t from, sg_host_t to, double byte_amount);
139 XBT_PUBLIC void sg_host_dump(sg_host_t ws);
141 XBT_PUBLIC void sg_host_get_actor_list(sg_host_t host, xbt_dynar_t whereto);
144 #endif /* SIMGRID_HOST_H_ */