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 "src/msg/msg_private.h"
10 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
12 simgrid::xbt::Extension<simgrid::s4u::Host, simgrid::MsgHostExt> simgrid::MsgHostExt::EXTENSION_ID;
14 int sg_storage_max_file_descriptors = 1024;
16 /** @addtogroup m_host_management
17 * (#msg_host_t) and the functions for managing it.
19 * A <em>location</em> (or <em>host</em>) is any possible place where a process may run. Thus it may be represented
20 * as a <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running process to
21 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local process.
25 /********************************* Host **************************************/
26 /** \ingroup m_host_management
27 * \brief Finds a msg_host_t using its name.
29 * This is a name directory service
30 * \param name the name of an host.
31 * \return the corresponding host
33 msg_host_t MSG_host_by_name(const char *name)
35 return simgrid::s4u::Host::by_name_or_null(name);
38 /** \ingroup m_host_management
40 * \brief Set the user data of a #msg_host_t.
42 * This functions attach \a data to \a host if it is possible.
44 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
45 sg_host_user_set(host, data);
49 /** \ingroup m_host_management
51 * \brief Return the user data of a #msg_host_t.
53 * This functions returns the user data associated to \a host if it is possible.
55 void *MSG_host_get_data(msg_host_t host) {
56 return sg_host_user(host);
59 /** \ingroup m_host_management
61 * \brief Return the location on which the current process is executed.
63 msg_host_t MSG_host_self()
65 return MSG_process_get_host(nullptr);
68 /** \ingroup m_host_management
70 * \brief Start the host if it is off
72 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
73 * for more info on DVFS.
75 void MSG_host_on(msg_host_t host)
80 /** \ingroup m_host_management
82 * \brief Stop the host if it is on
84 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
85 * for more info on DVFS.
87 void MSG_host_off(msg_host_t host)
92 /** \ingroup m_host_management
93 * \brief Return the current number MSG hosts.
95 int MSG_get_host_number()
97 return sg_host_count();
100 /** \ingroup m_host_management
101 * \brief Return a dynar containing all the hosts declared at a given point of time
102 * \remark The host order in the returned array is generally different from the host creation/declaration order in the
103 * XML platform (we use a hash table internally)
105 xbt_dynar_t MSG_hosts_as_dynar() {
106 return sg_hosts_as_dynar();
109 /** \ingroup m_host_management
110 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
112 double MSG_host_get_speed(msg_host_t host) {
113 return host->speed();
116 /** \ingroup m_host_management
117 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
118 * Deprecated: use MSG_host_get_speed
120 double MSG_get_host_speed(msg_host_t host) {
121 XBT_WARN("MSG_get_host_speed is deprecated: use MSG_host_get_speed");
122 return MSG_host_get_speed(host);
125 /** \ingroup m_host_management
126 * \brief Return the number of cores.
129 * \return the number of cores
131 int MSG_host_get_core_number(msg_host_t host) {
132 return host->coreCount();
135 /** \ingroup m_host_management
136 * \brief Return the list of processes attached to an host.
139 * \return a swag with the attached processes
141 xbt_swag_t MSG_host_get_process_list(msg_host_t host)
143 xbt_assert((host != nullptr), "Invalid parameters");
144 return host->processes();
147 /** \ingroup m_host_management
148 * \brief Returns the value of a given host property
151 * \param name a property name
152 * \return value of a property (or nullptr if property not set)
154 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
156 return static_cast<const char*>(xbt_dict_get_or_null(MSG_host_get_properties(host), name));
159 /** \ingroup m_host_management
160 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
163 * \return a dict containing the properties
165 xbt_dict_t MSG_host_get_properties(msg_host_t host)
167 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
168 return host->properties();
171 /** \ingroup m_host_management
172 * \brief Change the value of a given host property
175 * \param name a property name
176 * \param value what to change the property to
178 void MSG_host_set_property_value(msg_host_t host, const char* name, char* value)
180 xbt_dict_set(MSG_host_get_properties(host), name, value, nullptr);
183 /** @ingroup m_host_management
184 * @brief Determine if a host is up and running.
186 * 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.
188 * @param host host to test
189 * @return Returns true if the host is up and running, and false if it's currently down
191 int MSG_host_is_on(msg_host_t host)
196 /** @ingroup m_host_management
197 * @brief Determine if a host is currently off.
199 * 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.
201 int MSG_host_is_off(msg_host_t host)
203 return host->isOff();
206 /** \ingroup m_host_management
207 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
209 * \param host host to test
210 * \param pstate_index pstate to test
211 * \return Returns the processor speed associated with pstate_index
213 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
214 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
215 return host->getPstateSpeed(pstate_index);
218 /** \ingroup m_host_management
219 * \brief Return the current speed of the processor (in flop/s)
221 * \param host host to test
222 * \return Returns the current processor speed
224 double MSG_host_get_current_power_peak(msg_host_t host) {
225 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
226 return host->getPstateSpeedCurrent();
229 /** \ingroup m_host_management
230 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
232 * \param host host to test
234 int MSG_host_get_nb_pstates(msg_host_t host) {
235 return sg_host_get_nb_pstates(host);
238 /** \ingroup m_host_management
239 * \brief Return the list of mount point names on an host.
241 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
243 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
245 xbt_assert((host != nullptr), "Invalid parameters");
246 return host->mountedStoragesAsDict();
249 /** \ingroup m_host_management
250 * \brief Return the list of storages attached to an host.
252 * \return a dynar containing all storages (name) attached to the host
254 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
256 xbt_assert((host != nullptr), "Invalid parameters");
257 return host->attachedStorages();
260 /** \ingroup m_host_management
261 * \brief Return the content of mounted storages on an host.
263 * \return a dict containing content (as a dict) of all storages mounted on the host
265 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
267 xbt_assert((host != nullptr), "Invalid parameters");
268 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
269 msg_storage_t storage;
272 xbt_dict_cursor_t cursor = nullptr;
274 xbt_dict_t storage_list = host->mountedStoragesAsDict();
276 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
277 storage = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,storage_name));
278 xbt_dict_t content = simcall_storage_get_content(storage);
279 xbt_dict_set(contents,mount_name, content,nullptr);
281 xbt_dict_free(&storage_list);