1 /* Copyright (c) 2004-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "simgrid/s4u/host.hpp"
8 #include "simgrid/s4u/storage.hpp"
9 #include "src/msg/msg_private.h"
11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
13 simgrid::xbt::Extension<simgrid::s4u::Host, simgrid::MsgHostExt> simgrid::MsgHostExt::EXTENSION_ID;
17 int sg_storage_max_file_descriptors = 1024;
19 /** @addtogroup m_host_management
20 * (#msg_host_t) and the functions for managing it.
22 * A <em>location</em> (or <em>host</em>) is any possible place where a process may run. Thus it may be represented
23 * as a <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running process to
24 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local process.
28 /********************************* Host **************************************/
29 /** \ingroup m_host_management
30 * \brief Finds a msg_host_t using its name.
32 * This is a name directory service
33 * \param name the name of an host.
34 * \return the corresponding host
36 msg_host_t MSG_host_by_name(const char *name)
38 return simgrid::s4u::Host::by_name_or_null(name);
41 /** \ingroup m_host_management
43 * \brief Set the user data of a #msg_host_t.
45 * This functions attach \a data to \a host if it is possible.
47 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
48 sg_host_user_set(host, data);
52 /** \ingroup m_host_management
54 * \brief Return the user data of a #msg_host_t.
56 * This functions returns the user data associated to \a host if it is possible.
58 void *MSG_host_get_data(msg_host_t host) {
59 return sg_host_user(host);
62 /** \ingroup m_host_management
64 * \brief Return the location on which the current process is executed.
66 msg_host_t MSG_host_self()
68 return MSG_process_get_host(nullptr);
71 /** \ingroup m_host_management
73 * \brief Start the host if it is off
75 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
76 * for more info on DVFS.
78 void MSG_host_on(msg_host_t host)
83 /** \ingroup m_host_management
85 * \brief Stop the host if it is on
87 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
88 * for more info on DVFS.
90 void MSG_host_off(msg_host_t host)
95 /** \ingroup m_host_management
96 * \brief Return the current number MSG hosts.
98 int MSG_get_host_number()
100 return sg_host_count();
103 /** \ingroup m_host_management
104 * \brief Return a dynar containing all the hosts declared at a given point of time
105 * \remark The host order in the returned array is generally different from the host creation/declaration order in the
106 * XML platform (we use a hash table internally)
108 xbt_dynar_t MSG_hosts_as_dynar() {
109 return sg_hosts_as_dynar();
112 /** \ingroup m_host_management
113 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
115 double MSG_host_get_speed(msg_host_t host) {
116 return host->speed();
119 /** \ingroup m_host_management
120 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
121 * Deprecated: use MSG_host_get_speed
123 double MSG_get_host_speed(msg_host_t host) {
124 XBT_WARN("MSG_get_host_speed is deprecated: use MSG_host_get_speed");
125 return MSG_host_get_speed(host);
128 /** \ingroup m_host_management
129 * \brief Return the number of cores.
132 * \return the number of cores
134 int MSG_host_get_core_number(msg_host_t host) {
135 return host->coreCount();
138 /** \ingroup m_host_management
139 * \brief Return the list of processes attached to an host.
142 * \return a swag with the attached processes
144 xbt_swag_t MSG_host_get_process_list(msg_host_t host)
146 xbt_assert((host != nullptr), "Invalid parameters");
147 return host->processes();
150 /** \ingroup m_host_management
151 * \brief Returns the value of a given host property
154 * \param name a property name
155 * \return value of a property (or nullptr if property not set)
157 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
159 return static_cast<const char*>(xbt_dict_get_or_null(MSG_host_get_properties(host), name));
162 /** \ingroup m_host_management
163 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
166 * \return a dict containing the properties
168 xbt_dict_t MSG_host_get_properties(msg_host_t host)
170 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
171 return host->properties();
174 /** \ingroup m_host_management
175 * \brief Change the value of a given host property
178 * \param name a property name
179 * \param value what to change the property to
181 void MSG_host_set_property_value(msg_host_t host, const char* name, char* value)
183 xbt_dict_set(MSG_host_get_properties(host), name, value, nullptr);
186 /** @ingroup m_host_management
187 * @brief Determine if a host is up and running.
189 * See also #MSG_host_on() and #MSG_host_off() to switch the host ON and OFF and @ref SURF_plugin_energy for more info on DVFS.
191 * @param host host to test
192 * @return Returns true if the host is up and running, and false if it's currently down
194 int MSG_host_is_on(msg_host_t host)
199 /** @ingroup m_host_management
200 * @brief Determine if a host is currently off.
202 * See also #MSG_host_on() and #MSG_host_off() to switch the host ON and OFF and @ref SURF_plugin_energy for more info on DVFS.
204 int MSG_host_is_off(msg_host_t host)
206 return host->isOff();
209 /** \ingroup m_host_management
210 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
212 * \param host host to test
213 * \param pstate_index pstate to test
214 * \return Returns the processor speed associated with pstate_index
216 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
217 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
218 return host->getPstateSpeed(pstate_index);
221 /** \ingroup m_host_management
222 * \brief Return the current speed of the processor (in flop/s)
224 * \param host host to test
225 * \return Returns the current processor speed
227 double MSG_host_get_current_power_peak(msg_host_t host) {
228 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
229 return host->getPstateSpeedCurrent();
232 /** \ingroup m_host_management
233 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
235 * \param host host to test
237 int MSG_host_get_nb_pstates(msg_host_t host) {
238 return sg_host_get_nb_pstates(host);
241 /** \ingroup m_host_management
242 * \brief Return the list of mount point names on an host.
244 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
246 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
248 xbt_assert((host != nullptr), "Invalid parameters");
249 return host->mountedStoragesAsDict();
252 /** \ingroup m_host_management
253 * \brief Return the list of storages attached to an host.
255 * \return a dynar containing all storages (name) attached to the host
257 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
259 return sg_host_get_attached_storage_list(host);
262 /** \ingroup m_host_management
263 * \brief Return the content of mounted storages on an host.
265 * \return a dict containing content (as a dict) of all storages mounted on the host
267 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
269 xbt_assert((host != nullptr), "Invalid parameters");
270 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
271 msg_storage_t storage;
274 xbt_dict_cursor_t cursor = nullptr;
276 xbt_dict_t storage_list = host->mountedStoragesAsDict();
278 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
279 storage = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,storage_name));
280 xbt_dict_t content = simcall_storage_get_content(storage);
281 xbt_dict_set(contents,mount_name, content,nullptr);
283 xbt_dict_free(&storage_list);