1 /* Copyright (c) 2013-2017. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "simgrid/host.h"
10 #include "simgrid/s4u/Engine.hpp"
11 #include "simgrid/s4u/Host.hpp"
12 #include "xbt/Extendable.hpp"
15 #include "src/kernel/routing/NetPoint.hpp"
16 #include "src/simix/smx_host_private.hpp"
17 #include "src/surf/HostImpl.hpp"
18 #include "src/surf/cpu_interface.hpp"
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sg_host, sd, "Logging specific to sg_hosts");
24 size_t sg_host_count()
26 return simgrid::s4u::Engine::getInstance()->getHostCount();
28 /** @brief Returns the host list
30 * Uses sg_host_count() to know the array size.
32 * \return an array of \ref sg_host_t containing all the hosts in the platform.
33 * \remark The host order in this array is generally different from the
34 * creation/declaration order in the XML platform (we use a hash table
36 * \see sg_host_count()
38 sg_host_t *sg_host_list() {
39 xbt_assert(sg_host_count() > 0, "There is no host!");
40 std::vector<simgrid::s4u::Host*> hosts;
41 simgrid::s4u::Engine::getInstance()->getHostList(&hosts);
43 sg_host_t* res = (sg_host_t*)malloc(sizeof(sg_host_t) * hosts.size());
44 memcpy(res, hosts.data(), sizeof(sg_host_t) * hosts.size());
49 const char *sg_host_get_name(sg_host_t host)
51 return host->getCname();
54 void* sg_host_extension_get(sg_host_t host, size_t ext)
56 return host->extension(ext);
59 size_t sg_host_extension_create(void(*deleter)(void*))
61 return simgrid::s4u::Host::extension_create(deleter);
64 sg_host_t sg_host_by_name(const char *name)
66 return simgrid::s4u::Host::by_name_or_null(name);
69 static int hostcmp_voidp(const void* pa, const void* pb)
71 return strcmp((*static_cast<simgrid::s4u::Host* const*>(pa))->getCname(),
72 (*static_cast<simgrid::s4u::Host* const*>(pb))->getCname());
75 xbt_dynar_t sg_hosts_as_dynar()
77 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t),nullptr);
79 std::vector<simgrid::s4u::Host*> list;
80 simgrid::s4u::Engine::getInstance()->getHostList(&list);
82 for (auto const& host : list) {
83 if (host && host->pimpl_netpoint && host->pimpl_netpoint->isHost())
84 xbt_dynar_push(res, &host);
86 xbt_dynar_sort(res, hostcmp_voidp);
90 // ========= Layering madness ==============*
92 // ========== User data Layer ==========
93 void *sg_host_user(sg_host_t host) {
94 return host->extension(USER_HOST_LEVEL);
96 void sg_host_user_set(sg_host_t host, void* userdata) {
97 host->extension_set(USER_HOST_LEVEL,userdata);
99 void sg_host_user_destroy(sg_host_t host) {
100 host->extension_set(USER_HOST_LEVEL, nullptr);
103 // ========= storage related functions ============
104 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host){
105 xbt_assert((host != nullptr), "Invalid parameters");
106 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
107 for (auto const& elm : host->getMountedStorages()) {
108 const char* mount_name = elm.first.c_str();
109 sg_storage_t storage = elm.second;
110 xbt_dict_set(res, mount_name, (void*)storage->getCname(), nullptr);
116 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host){
117 std::vector<const char*>* storage_vector = new std::vector<const char*>();
118 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
119 host->getAttachedStorages(storage_vector);
120 for (auto const& name : *storage_vector)
121 xbt_dynar_push(storage_dynar, &name);
122 delete storage_vector;
123 return storage_dynar;
126 // =========== user-level functions ===============
127 // ================================================
128 /** @brief Returns the total speed of a host */
129 double sg_host_speed(sg_host_t host)
131 return host->getSpeed();
134 /** \ingroup m_host_management
135 * \brief Return the number of cores.
138 * \return the number of cores
140 int sg_host_core_count(sg_host_t host)
142 return host->getCoreCount();
145 double sg_host_get_available_speed(sg_host_t host)
147 return host->pimpl_cpu->getAvailableSpeed();
150 /** @brief Returns the number of power states for a host.
152 * See also @ref plugin_energy.
154 int sg_host_get_nb_pstates(sg_host_t host) {
155 return host->getPstatesCount();
158 /** @brief Gets the pstate at which that host currently runs.
160 * See also @ref plugin_energy.
162 int sg_host_get_pstate(sg_host_t host) {
163 return host->getPstate();
165 /** @brief Sets the pstate at which that host should run.
167 * See also @ref plugin_energy.
169 void sg_host_set_pstate(sg_host_t host,int pstate) {
170 host->setPstate(pstate);
173 /** \ingroup m_host_management
175 * \brief Start the host if it is off
177 * See also #sg_host_is_on() and #sg_host_is_off() to test the current state of the host and @ref plugin_energy
178 * for more info on DVFS.
180 void sg_host_turn_on(sg_host_t host)
185 /** \ingroup m_host_management
187 * \brief Stop the host if it is on
189 * See also #MSG_host_is_on() and #MSG_host_is_off() to test the current state of the host and @ref plugin_energy
190 * for more info on DVFS.
192 void sg_host_turn_off(sg_host_t host)
197 /** @ingroup m_host_management
198 * @brief Determine if a host is up and running.
200 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
203 * @param host host to test
204 * @return Returns true if the host is up and running, and false if it's currently down
206 int sg_host_is_on(sg_host_t host)
211 /** @ingroup m_host_management
212 * @brief Determine if a host is currently off.
214 * See also #sg_host_turn_on() and #sg_host_turn_off() to switch the host ON and OFF and @ref plugin_energy for more
217 int sg_host_is_off(sg_host_t host)
219 return host->isOff();
222 /** @brief Get the properties of an host */
223 xbt_dict_t sg_host_get_properties(sg_host_t host) {
224 xbt_dict_t as_dict = xbt_dict_new_homogeneous(xbt_free_f);
225 std::map<std::string, std::string>* props = host->getProperties();
226 if (props == nullptr)
228 for (auto const& elm : *props) {
229 xbt_dict_set(as_dict, elm.first.c_str(), xbt_strdup(elm.second.c_str()), nullptr);
234 /** \ingroup m_host_management
235 * \brief Returns the value of a given host property
238 * \param name a property name
239 * \return value of a property (or nullptr if property not set)
241 const char *sg_host_get_property_value(sg_host_t host, const char *name)
243 return host->getProperty(name);
246 void sg_host_set_property_value(sg_host_t host, const char* name, const char* value)
248 host->setProperty(name, value);
252 * \brief Find a route between two hosts
254 * \param from where from
256 * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
258 void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
260 std::vector<simgrid::s4u::Link*> vlinks;
261 from->routeTo(to, vlinks, nullptr);
262 for (auto const& link : vlinks)
263 xbt_dynar_push(links, &link);
266 * \brief Find the latency of the route between two hosts
268 * \param from where from
271 double sg_host_route_latency(sg_host_t from, sg_host_t to)
273 std::vector<simgrid::s4u::Link*> vlinks;
275 from->routeTo(to, vlinks, &res);
279 * \brief Find the bandwitdh of the route between two hosts
281 * \param from where from
284 double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
286 double min_bandwidth = -1.0;
288 std::vector<simgrid::s4u::Link*> vlinks;
289 from->routeTo(to, vlinks, nullptr);
290 for (auto const& link : vlinks) {
291 double bandwidth = link->bandwidth();
292 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
293 min_bandwidth = bandwidth;
295 return min_bandwidth;
298 /** @brief Displays debugging information about a host */
299 void sg_host_dump(sg_host_t host)
301 XBT_INFO("Displaying host %s", host->getCname());
302 XBT_INFO(" - speed: %.0f", host->getSpeed());
303 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
304 std::map<std::string, std::string>* props = host->getProperties();
306 if (not props->empty()) {
307 XBT_INFO(" - properties:");
308 for (auto const& elm : *props) {
309 XBT_INFO(" %s->%s", elm.first.c_str(), elm.second.c_str());