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>
14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(msg);
16 int sg_storage_max_file_descriptors = 1024;
18 /** @addtogroup m_host_management
19 * (#msg_host_t) and the functions for managing it.
21 * A <em>location</em> (or <em>host</em>) is any possible place where a process may run. Thus it may be represented
22 * as a <em>physical resource with computing capabilities</em>, some <em>mailboxes</em> to enable running process to
23 * communicate with remote ones, and some <em>private data</em> that can be only accessed by local process.
27 /********************************* Host **************************************/
28 msg_host_t __MSG_host_create(sg_host_t host) // FIXME: don't return our parameter
30 msg_host_priv_t priv = xbt_new0(s_msg_host_priv_t, 1);
32 priv->dp_objs = nullptr;
34 priv->dp_updated_by_deleted_tasks = 0;
35 priv->is_migrating = 0;
37 priv->file_descriptor_table = nullptr;
39 sg_host_msg_set(host,priv);
44 /** \ingroup m_host_management
45 * \brief Finds a msg_host_t using its name.
47 * This is a name directory service
48 * \param name the name of an host.
49 * \return the corresponding host
51 msg_host_t MSG_host_by_name(const char *name)
53 return simgrid::s4u::Host::by_name_or_null(name);
56 /** \ingroup m_host_management
58 * \brief Set the user data of a #msg_host_t.
60 * This functions attach \a data to \a host if it is possible.
62 msg_error_t MSG_host_set_data(msg_host_t host, void *data) {
63 sg_host_user_set(host, data);
67 /** \ingroup m_host_management
69 * \brief Return the user data of a #msg_host_t.
71 * This functions returns the user data associated to \a host if it is possible.
73 void *MSG_host_get_data(msg_host_t host) {
74 return sg_host_user(host);
77 /** \ingroup m_host_management
79 * \brief Return the location on which the current process is executed.
81 msg_host_t MSG_host_self()
83 return MSG_process_get_host(nullptr);
86 /** \ingroup m_host_management
88 * \brief Start the host if it is off
90 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
91 * for more info on DVFS.
93 void MSG_host_on(msg_host_t host)
98 /** \ingroup m_host_management
100 * \brief Stop the host if it is on
102 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref SURF_plugin_energy
103 * for more info on DVFS.
105 void MSG_host_off(msg_host_t host)
111 * \brief Frees private data of a host (internal call only)
113 void __MSG_host_priv_free(msg_host_priv_t priv)
117 unsigned int size = priv->dp_objs ? xbt_dict_size(priv->dp_objs) : 0;
119 XBT_WARN("dp_objs: %u pending task?", size);
120 xbt_dict_free(&priv->dp_objs);
121 delete priv->file_descriptor_table;
125 /** \ingroup m_host_management
126 * \brief Return the current number MSG hosts.
128 int MSG_get_host_number()
130 return sg_host_count();
133 /** \ingroup m_host_management
134 * \brief Return a dynar containing all the hosts declared at a given point of time
135 * \remark The host order in the returned array is generally different from the host creation/declaration order in the
136 * XML platform (we use a hash table internally)
138 xbt_dynar_t MSG_hosts_as_dynar() {
139 return sg_hosts_as_dynar();
142 /** \ingroup m_host_management
143 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
145 double MSG_host_get_speed(msg_host_t host) {
146 return host->speed();
149 /** \ingroup m_host_management
150 * \brief Return the speed of the processor (in flop/s), regardless of the current load on the machine.
151 * Deprecated: use MSG_host_get_speed
153 double MSG_get_host_speed(msg_host_t host) {
154 XBT_WARN("MSG_get_host_speed is deprecated: use MSG_host_get_speed");
155 return MSG_host_get_speed(host);
158 /** \ingroup m_host_management
159 * \brief Return the number of cores.
162 * \return the number of cores
164 int MSG_host_get_core_number(msg_host_t host) {
165 return host->coreCount();
168 /** \ingroup m_host_management
169 * \brief Return the list of processes attached to an host.
172 * \return a swag with the attached processes
174 xbt_swag_t MSG_host_get_process_list(msg_host_t host)
176 xbt_assert((host != nullptr), "Invalid parameters");
177 return host->processes();
180 /** \ingroup m_host_management
181 * \brief Returns the value of a given host property
184 * \param name a property name
185 * \return value of a property (or nullptr if property not set)
187 const char *MSG_host_get_property_value(msg_host_t host, const char *name)
189 return static_cast<const char*>(xbt_dict_get_or_null(MSG_host_get_properties(host), name));
192 /** \ingroup m_host_management
193 * \brief Returns a xbt_dict_t consisting of the list of properties assigned to this host
196 * \return a dict containing the properties
198 xbt_dict_t MSG_host_get_properties(msg_host_t host)
200 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
201 return host->properties();
204 /** \ingroup m_host_management
205 * \brief Change the value of a given host property
208 * \param name a property name
209 * \param value what to change the property to
210 * \param free_ctn the freeing function to use to kill the value on need
212 void MSG_host_set_property_value(msg_host_t host, const char *name, char *value,void_f_pvoid_t free_ctn) {
213 xbt_dict_set(MSG_host_get_properties(host), name, value,free_ctn);
216 /** @ingroup m_host_management
217 * @brief Determine if a host is up and running.
219 * 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.
221 * @param host host to test
222 * @return Returns true if the host is up and running, and false if it's currently down
224 int MSG_host_is_on(msg_host_t host)
229 /** @ingroup m_host_management
230 * @brief Determine if a host is currently off.
232 * 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.
234 int MSG_host_is_off(msg_host_t host)
236 return host->isOff();
239 /** \ingroup m_host_management
240 * \brief Return the speed of the processor (in flop/s) at a given pstate. See also @ref SURF_plugin_energy.
242 * \param host host to test
243 * \param pstate_index pstate to test
244 * \return Returns the processor speed associated with pstate_index
246 double MSG_host_get_power_peak_at(msg_host_t host, int pstate_index) {
247 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
248 return host->getPstateSpeed(pstate_index);
251 /** \ingroup m_host_management
252 * \brief Return the current speed of the processor (in flop/s)
254 * \param host host to test
255 * \return Returns the current processor speed
257 double MSG_host_get_current_power_peak(msg_host_t host) {
258 xbt_assert((host != nullptr), "Invalid parameters (host is nullptr)");
259 return host->getPstateSpeedCurrent();
262 /** \ingroup m_host_management
263 * \brief Return the total count of pstates defined for a host. See also @ref SURF_plugin_energy.
265 * \param host host to test
267 int MSG_host_get_nb_pstates(msg_host_t host) {
268 return sg_host_get_nb_pstates(host);
271 /** \ingroup m_host_management
272 * \brief Return the list of mount point names on an host.
274 * \return a dict containing all mount point on the host (mount_name => msg_storage_t)
276 xbt_dict_t MSG_host_get_mounted_storage_list(msg_host_t host)
278 xbt_assert((host != nullptr), "Invalid parameters");
279 return host->mountedStoragesAsDict();
282 /** \ingroup m_host_management
283 * \brief Return the list of storages attached to an host.
285 * \return a dynar containing all storages (name) attached to the host
287 xbt_dynar_t MSG_host_get_attached_storage_list(msg_host_t host)
289 xbt_assert((host != nullptr), "Invalid parameters");
290 return host->attachedStorages();
293 /** \ingroup m_host_management
294 * \brief Return the content of mounted storages on an host.
296 * \return a dict containing content (as a dict) of all storages mounted on the host
298 xbt_dict_t MSG_host_get_storage_content(msg_host_t host)
300 xbt_assert((host != nullptr), "Invalid parameters");
301 xbt_dict_t contents = xbt_dict_new_homogeneous(nullptr);
302 msg_storage_t storage;
305 xbt_dict_cursor_t cursor = nullptr;
307 xbt_dict_t storage_list = host->mountedStoragesAsDict();
309 xbt_dict_foreach(storage_list,cursor,mount_name,storage_name){
310 storage = static_cast<msg_storage_t>(xbt_lib_get_elm_or_null(storage_lib,storage_name));
311 xbt_dict_t content = simcall_storage_get_content(storage);
312 xbt_dict_set(contents,mount_name, content,nullptr);
314 xbt_dict_free(&storage_list);
318 int __MSG_host_get_file_descriptor_id(msg_host_t host){
319 msg_host_priv_t priv = sg_host_msg(host);
320 if(!priv->file_descriptor_table){
321 priv->file_descriptor_table = new std::vector<int>(sg_storage_max_file_descriptors);
322 std::iota (priv->file_descriptor_table->rbegin(), priv->file_descriptor_table->rend(), 0); // Fill with ..., 1, 0.
324 xbt_assert(!priv->file_descriptor_table->empty(), "Too much files are opened! Some have to be closed.");
325 int desc = priv->file_descriptor_table->back();
326 priv->file_descriptor_table->pop_back();
330 void __MSG_host_release_file_descriptor_id(msg_host_t host, int id){
331 msg_host_priv_t priv = sg_host_msg(host);
332 priv->file_descriptor_table->push_back(id);