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"
10 #include "src/simix/ActorImpl.hpp"
12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
14 simgrid::xbt::Extension<simgrid::s4u::Host, simgrid::MsgHostExt> simgrid::MsgHostExt::EXTENSION_ID;
18 int sg_storage_max_file_descriptors = 1024;
20 /** @addtogroup m_host_management
21 * (#msg_host_t) and the functions for managing it.
23 * A <em>location</em> (or <em>host</em>) is any possible place where a process may run. Thus it may be represented
24 * as a <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running process to
25 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local process.
29 /********************************* Host **************************************/
30 /** \ingroup m_host_management
31 * \brief Finds a msg_host_t using its name.
33 * This is a name directory service
34 * \param name the name of an host.
35 * \return the corresponding host
37 msg_host_t MSG_host_by_name(const char *name)
39 return simgrid::s4u::Host::by_name_or_null(name);
42 /** \ingroup m_host_management
44 * \brief Set the user data of a #msg_host_t.
46 * This functions attach \a data to \a host if it is possible.
48 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
49 sg_host_user_set(host, data);
53 /** \ingroup m_host_management
55 * \brief Return the user data of a #msg_host_t.
57 * This functions returns the user data associated to \a host if it is possible.
59 void *MSG_host_get_data(msg_host_t host) {
60 return sg_host_user(host);
63 /** \ingroup m_host_management
65 * \brief Return the location on which the current process is executed.
67 msg_host_t MSG_host_self()
69 return MSG_process_get_host(nullptr);
72 /** \ingroup m_host_management
74 * \brief Start the host if it is off
76 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
77 * for more info on DVFS.
79 void MSG_host_on(msg_host_t host)
84 /** \ingroup m_host_management
86 * \brief Stop the host if it is on
88 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
89 * for more info on DVFS.
91 void MSG_host_off(msg_host_t host)
96 /** \ingroup m_host_management
97 * \brief Return the current number MSG hosts.
99 int MSG_get_host_number()
101 return sg_host_count();
104 /** \ingroup m_host_management
105 * \brief Return a dynar containing all the hosts declared at a given point of time
106 * \remark The host order in the returned array is generally different from the host creation/declaration order in the
107 * XML platform (we use a hash table internally)
109 xbt_dynar_t MSG_hosts_as_dynar() {
110 return sg_hosts_as_dynar();
113 /** \ingroup m_host_management
114 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
116 double MSG_host_get_speed(msg_host_t host) {
117 return host->speed();
120 /** \ingroup m_host_management
121 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
122 * Deprecated: use MSG_host_get_speed
124 double MSG_get_host_speed(msg_host_t host) {
125 XBT_WARN("MSG_get_host_speed is deprecated: use MSG_host_get_speed");
126 return MSG_host_get_speed(host);
129 /** \ingroup m_host_management
130 * \brief Return the number of cores.
133 * \return the number of cores
135 int MSG_host_get_core_number(msg_host_t host) {
136 return host->coreCount();
139 /** \ingroup m_host_management
140 * \brief Return the list of processes attached to an host.
143 * \param whereto a dynar in which we should push processes living on that host
145 void MSG_host_get_process_list(msg_host_t host, xbt_dynar_t whereto)
147 xbt_assert((host != nullptr), "Invalid parameters");
148 smx_actor_t actor = NULL;
149 xbt_swag_foreach(actor, host->processes()) {
150 msg_process_t p = actor->ciface();
151 xbt_dynar_push(whereto, &p);
155 /** \ingroup m_host_management
156 * \brief Returns the value of a given host property
159 * \param name a property name
160 * \return value of a property (or nullptr if property not set)
162 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
164 return static_cast<const char*>(xbt_dict_get_or_null(MSG_host_get_properties(host), name));
167 /** \ingroup m_host_management
168 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
171 * \return a dict containing the properties
173 xbt_dict_t MSG_host_get_properties(msg_host_t host)
175 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
176 return host->properties();
179 /** \ingroup m_host_management
180 * \brief Change the value of a given host property
183 * \param name a property name
184 * \param value what to change the property to
186 void MSG_host_set_property_value(msg_host_t host, const char* name, char* value)
188 xbt_dict_set(MSG_host_get_properties(host), name, value, nullptr);
191 /** @ingroup m_host_management
192 * @brief Determine if a host is up and running.
194 * 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.
196 * @param host host to test
197 * @return Returns true if the host is up and running, and false if it's currently down
199 int MSG_host_is_on(msg_host_t host)
204 /** @ingroup m_host_management
205 * @brief Determine if a host is currently off.
207 * 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.
209 int MSG_host_is_off(msg_host_t host)
211 return host->isOff();
214 /** \ingroup m_host_management
215 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
217 * \param host host to test
218 * \param pstate_index pstate to test
219 * \return Returns the processor speed associated with pstate_index
221 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
222 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
223 return host->getPstateSpeed(pstate_index);
226 /** \ingroup m_host_management
227 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
229 * \param host host to test
231 int MSG_host_get_nb_pstates(msg_host_t host) {
232 return sg_host_get_nb_pstates(host);
235 /** \ingroup m_host_management
236 * \brief Return the list of mount point names on an host.
238 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
240 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
242 xbt_assert((host != nullptr), "Invalid parameters");
243 return host->mountedStoragesAsDict();
246 /** \ingroup m_host_management
247 * \brief Return the list of storages attached to an host.
249 * \return a dynar containing all storages (name) attached to the host
251 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
253 return sg_host_get_attached_storage_list(host);
256 /** \ingroup m_host_management
257 * \brief Return the content of mounted storages on an host.
259 * \return a dict containing content (as a dict) of all storages mounted on the host
261 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
263 xbt_assert((host != nullptr), "Invalid parameters");
264 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
265 msg_storage_t storage;
268 xbt_dict_cursor_t cursor = nullptr;
270 xbt_dict_t storage_list = host->mountedStoragesAsDict();
272 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
273 storage = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,storage_name));
274 xbt_dict_t content = simcall_storage_get_content(storage);
275 xbt_dict_set(contents,mount_name, content,nullptr);
277 xbt_dict_free(&storage_list);