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 "src/msg/msg_private.h"
8 #include "xbt/sysdep.h"
10 #include "simgrid/simix.h"
11 #include <simgrid/s4u/host.hpp>
13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
15 int sg_storage_max_file_descriptors = 1024;
17 /** @addtogroup m_host_management
18 * (#msg_host_t) and the functions for managing it.
20 * A <em>location</em> (or <em>host</em>) is any possible place where a process may run. Thus it may be represented
21 * as a <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running process to
22 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local process.
26 /********************************* Host **************************************/
27 msg_host_t __MSG_host_create(sg_host_t host) // FIXME: don't return our parameter
29 msg_host_priv_t priv = xbt_new0(s_msg_host_priv_t, 1);
31 priv->dp_objs = xbt_dict_new();
33 priv->dp_updated_by_deleted_tasks = 0;
34 priv->is_migrating = 0;
36 priv->file_descriptor_table = xbt_dynar_new(sizeof(int), nullptr);
37 for (int i=sg_storage_max_file_descriptors-1; i>=0;i--)
38 xbt_dynar_push_as(priv->file_descriptor_table, int, i);
40 sg_host_msg_set(host,priv);
45 /** \ingroup m_host_management
46 * \brief Finds a msg_host_t using its name.
48 * This is a name directory service
49 * \param name the name of an host.
50 * \return the corresponding host
52 msg_host_t MSG_host_by_name(const char *name)
54 return simgrid::s4u::Host::by_name_or_null(name);
57 /** \ingroup m_host_management
59 * \brief Set the user data of a #msg_host_t.
61 * This functions attach \a data to \a host if it is possible.
63 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
64 sg_host_user_set(host, data);
68 /** \ingroup m_host_management
70 * \brief Return the user data of a #msg_host_t.
72 * This functions returns the user data associated to \a host if it is possible.
74 void *MSG_host_get_data(msg_host_t host) {
75 return sg_host_user(host);
78 /** \ingroup m_host_management
80 * \brief Return the location on which the current process is executed.
82 msg_host_t MSG_host_self()
84 return MSG_process_get_host(nullptr);
87 /** \ingroup m_host_management
89 * \brief Start the host if it is off
91 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
92 * for more info on DVFS.
94 void MSG_host_on(msg_host_t host)
99 /** \ingroup m_host_management
101 * \brief Stop the host if it is on
103 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
104 * for more info on DVFS.
106 void MSG_host_off(msg_host_t host)
112 * \brief Frees private data of a host (internal call only)
114 void __MSG_host_priv_free(msg_host_priv_t priv)
118 unsigned int size = xbt_dict_size(priv->dp_objs);
120 XBT_WARN("dp_objs: %u pending task?", size);
121 xbt_dict_free(&priv->dp_objs);
122 xbt_dynar_free(&priv->file_descriptor_table);
127 /** \ingroup m_host_management
128 * \brief Return the current number MSG hosts.
130 int MSG_get_host_number()
132 return xbt_dict_length(host_list);
135 /** \ingroup m_host_management
136 * \brief Return a dynar containing all the hosts declared at a given point of time
137 * \remark The host order in the returned array is generally different from the host creation/declaration order in the
138 * XML platform (we use a hash table internally)
140 xbt_dynar_t MSG_hosts_as_dynar() {
141 return sg_hosts_as_dynar();
144 /** \ingroup m_host_management
145 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
147 double MSG_host_get_speed(msg_host_t host) {
148 return host->speed();
151 /** \ingroup m_host_management
152 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
153 * Deprecated: use MSG_host_get_speed
155 double MSG_get_host_speed(msg_host_t host) {
156 XBT_WARN("MSG_get_host_speed is deprecated: use MSG_host_get_speed");
157 return MSG_host_get_speed(host);
161 /** \ingroup m_host_management
162 * \brief Return the number of cores.
165 * \return the number of cores
167 int MSG_host_get_core_number(msg_host_t host) {
168 return host->coresCount();
171 /** \ingroup m_host_management
172 * \brief Return the list of processes attached to an host.
175 * \return a swag with the attached processes
177 xbt_swag_t MSG_host_get_process_list(msg_host_t host)
179 xbt_assert((host != nullptr), "Invalid parameters");
180 return host->processes();
183 /** \ingroup m_host_management
184 * \brief Returns the value of a given host property
187 * \param name a property name
188 * \return value of a property (or nullptr if property not set)
190 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
192 return static_cast<const char*>(xbt_dict_get_or_null(MSG_host_get_properties(host), name));
195 /** \ingroup m_host_management
196 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
199 * \return a dict containing the properties
201 xbt_dict_t MSG_host_get_properties(msg_host_t host)
203 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
204 return host->properties();
207 /** \ingroup m_host_management
208 * \brief Change the value of a given host property
211 * \param name a property name
212 * \param value what to change the property to
213 * \param free_ctn the freeing function to use to kill the value on need
215 void MSG_host_set_property_value(msg_host_t host, const char *name, char *value,void_f_pvoid_t free_ctn) {
216 xbt_dict_set(MSG_host_get_properties(host), name, value,free_ctn);
219 /** @ingroup m_host_management
220 * @brief Determine if a host is up and running.
222 * 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.
224 * @param host host to test
225 * @return Returns true if the host is up and running, and false if it's currently down
227 int MSG_host_is_on(msg_host_t host)
232 /** @ingroup m_host_management
233 * @brief Determine if a host is currently off.
235 * 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.
237 int MSG_host_is_off(msg_host_t host)
239 return host->isOff();
242 /** \ingroup m_host_management
243 * \brief Set the parameters of a given host
246 * \param params a prameter object
248 void MSG_host_set_params(msg_host_t host, vm_params_t params)
250 host->setParameters(params);
253 /** \ingroup m_host_management
254 * \brief Get the parameters of a given host
257 * \param params a prameter object
259 void MSG_host_get_params(msg_host_t host, vm_params_t params)
261 host->parameters(params);
264 /** \ingroup m_host_management
265 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
267 * \param host host to test
268 * \param pstate_index pstate to test
269 * \return Returns the processor speed associated with pstate_index
271 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
272 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
273 return host->getPstateSpeed(pstate_index);
276 /** \ingroup m_host_management
277 * \brief Return the current speed of the processor (in flop/s)
279 * \param host host to test
280 * \return Returns the current processor speed
282 double MSG_host_get_current_power_peak(msg_host_t host) {
283 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
284 return host->getPstateSpeedCurrent();
287 /** \ingroup m_host_management
288 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
290 * \param host host to test
292 int MSG_host_get_nb_pstates(msg_host_t host) {
293 return sg_host_get_nb_pstates(host);
296 /** \ingroup m_host_management
297 * \brief Return the list of mount point names on an host.
299 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
301 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
303 xbt_assert((host != nullptr), "Invalid parameters");
304 return host->mountedStoragesAsDict();
307 /** \ingroup m_host_management
308 * \brief Return the list of storages attached to an host.
310 * \return a dynar containing all storages (name) attached to the host
312 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
314 xbt_assert((host != nullptr), "Invalid parameters");
315 return host->attachedStorages();
318 /** \ingroup m_host_management
319 * \brief Return the content of mounted storages on an host.
321 * \return a dict containing content (as a dict) of all storages mounted on the host
323 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
325 xbt_assert((host != nullptr), "Invalid parameters");
326 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
327 msg_storage_t storage;
330 xbt_dict_cursor_t cursor = nullptr;
332 xbt_dict_t storage_list = host->mountedStoragesAsDict();
334 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
335 storage = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,storage_name));
336 xbt_dict_t content = simcall_storage_get_content(storage);
337 xbt_dict_set(contents,mount_name, content,nullptr);
339 xbt_dict_free(&storage_list);
343 int __MSG_host_get_file_descriptor_id(msg_host_t host){
344 msg_host_priv_t priv = sg_host_msg(host);
345 xbt_assert(!xbt_dynar_is_empty(priv->file_descriptor_table), "Too much files are opened! Some have to be closed.");
346 return xbt_dynar_pop_as(priv->file_descriptor_table, int);
349 void __MSG_host_release_file_descriptor_id(msg_host_t host, int id){
350 msg_host_priv_t priv = sg_host_msg(host);
351 xbt_dynar_push_as(priv->file_descriptor_table, int, id);