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/Host.hpp"
11 #include "xbt/Extendable.hpp"
14 #include "src/kernel/routing/NetPoint.hpp"
15 #include "src/simix/smx_host_private.h"
16 #include "src/surf/HostImpl.hpp"
17 #include "src/surf/cpu_interface.hpp"
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sg_host, sd, "Logging specific to sg_hosts");
21 // FIXME: The following duplicates the content of s4u::Host
24 extern std::map<std::string, simgrid::s4u::Host*> host_list;
32 /* copy all names to not modify the map while iterating over it.
34 * Plus, the hosts are destroyed in the lexicographic order to ensure
35 * that the output is reproducible: we don't want to kill them in the
36 * pointer order as it could be platform-dependent, which would break
39 std::vector<std::string> names = std::vector<std::string>();
40 for (auto kv : simgrid::s4u::host_list)
41 names.push_back(kv.second->name());
43 std::sort(names.begin(), names.end());
45 for (auto name : names)
46 simgrid::s4u::host_list.at(name)->destroy();
48 // host_list.clear(); This would be sufficient if the dict would contain smart_ptr. It's now useless
51 size_t sg_host_count()
53 return simgrid::s4u::host_list.size();
55 /** @brief Returns the host list
57 * Uses sg_host_count() to know the array size.
59 * \return an array of \ref sg_host_t containing all the hosts in the platform.
60 * \remark The host order in this array is generally different from the
61 * creation/declaration order in the XML platform (we use a hash table
63 * \see sg_host_count()
65 sg_host_t *sg_host_list() {
66 xbt_assert(sg_host_count() > 0, "There is no host!");
67 return (sg_host_t*)xbt_dynar_to_array(sg_hosts_as_dynar());
70 const char *sg_host_get_name(sg_host_t host)
75 void* sg_host_extension_get(sg_host_t host, size_t ext)
77 return host->extension(ext);
80 size_t sg_host_extension_create(void(*deleter)(void*))
82 return simgrid::s4u::Host::extension_create(deleter);
85 sg_host_t sg_host_by_name(const char *name)
87 return simgrid::s4u::Host::by_name_or_null(name);
90 static int hostcmp_voidp(const void* pa, const void* pb)
92 return strcmp((*static_cast<simgrid::s4u::Host* const*>(pa))->cname(),
93 (*static_cast<simgrid::s4u::Host* const*>(pb))->cname());
96 xbt_dynar_t sg_hosts_as_dynar()
98 xbt_dynar_t res = xbt_dynar_new(sizeof(sg_host_t),nullptr);
100 for (auto kv : simgrid::s4u::host_list) {
101 simgrid::s4u::Host* host = kv.second;
102 if (host && host->pimpl_netpoint && host->pimpl_netpoint->isHost())
103 xbt_dynar_push(res, &host);
105 xbt_dynar_sort(res, hostcmp_voidp);
109 // ========= Layering madness ==============*
111 // ========== User data Layer ==========
112 void *sg_host_user(sg_host_t host) {
113 return host->extension(USER_HOST_LEVEL);
115 void sg_host_user_set(sg_host_t host, void* userdata) {
116 host->extension_set(USER_HOST_LEVEL,userdata);
118 void sg_host_user_destroy(sg_host_t host) {
119 host->extension_set(USER_HOST_LEVEL, nullptr);
122 // ========= storage related functions ============
123 xbt_dict_t sg_host_get_mounted_storage_list(sg_host_t host){
124 xbt_assert((host != nullptr), "Invalid parameters");
125 xbt_dict_t res = xbt_dict_new_homogeneous(nullptr);
126 for (auto elm : host->mountedStorages()) {
127 const char* mount_name = elm.first.c_str();
128 sg_storage_t storage = elm.second;
129 xbt_dict_set(res, mount_name, (void*)storage->name(), nullptr);
135 xbt_dynar_t sg_host_get_attached_storage_list(sg_host_t host){
136 std::vector<const char*>* storage_vector = new std::vector<const char*>();
137 xbt_dynar_t storage_dynar = xbt_dynar_new(sizeof(const char*), nullptr);
138 host->attachedStorages(storage_vector);
139 for (auto name : *storage_vector)
140 xbt_dynar_push(storage_dynar, &name);
141 delete storage_vector;
142 return storage_dynar;
145 // =========== user-level functions ===============
146 // ================================================
147 /** @brief Returns the total speed of a host */
148 double sg_host_speed(sg_host_t host)
150 return host->speed();
153 double sg_host_get_available_speed(sg_host_t host)
155 return host->pimpl_cpu->getAvailableSpeed();
158 /** @brief Returns the number of power states for a host.
160 * See also @ref SURF_plugin_energy.
162 int sg_host_get_nb_pstates(sg_host_t host) {
163 return host->pstatesCount();
166 /** @brief Gets the pstate at which that host currently runs.
168 * See also @ref SURF_plugin_energy.
170 int sg_host_get_pstate(sg_host_t host) {
171 return host->pstate();
173 /** @brief Sets the pstate at which that host should run.
175 * See also @ref SURF_plugin_energy.
177 void sg_host_set_pstate(sg_host_t host,int pstate) {
178 host->setPstate(pstate);
181 /** @brief Get the properties of an host */
182 xbt_dict_t sg_host_get_properties(sg_host_t host) {
183 return host->properties();
186 /** \ingroup m_host_management
187 * \brief Returns the value of a given host property
190 * \param name a property name
191 * \return value of a property (or nullptr if property not set)
193 const char *sg_host_get_property_value(sg_host_t host, const char *name)
195 return (const char*) xbt_dict_get_or_null(sg_host_get_properties(host), name);
198 * \brief Find a route between two hosts
200 * \param from where from
202 * \param links [OUT] where to store the list of links (must exist, cannot be nullptr).
204 void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links)
206 std::vector<simgrid::s4u::Link*> vlinks;
207 from->routeTo(to, &vlinks, nullptr);
208 for (auto link : vlinks)
209 xbt_dynar_push(links, &link);
212 * \brief Find the latency of the route between two hosts
214 * \param from where from
217 double sg_host_route_latency(sg_host_t from, sg_host_t to)
219 std::vector<simgrid::s4u::Link*> vlinks;
221 from->routeTo(to, &vlinks, &res);
225 * \brief Find the bandwitdh of the route between two hosts
227 * \param from where from
230 double sg_host_route_bandwidth(sg_host_t from, sg_host_t to)
232 double min_bandwidth = -1.0;
234 std::vector<simgrid::s4u::Link*> vlinks;
235 from->routeTo(to, &vlinks, nullptr);
236 for (auto link : vlinks) {
237 double bandwidth = link->bandwidth();
238 if (bandwidth < min_bandwidth || min_bandwidth < 0.0)
239 min_bandwidth = bandwidth;
241 return min_bandwidth;
244 /** @brief Displays debugging information about a host */
245 void sg_host_dump(sg_host_t host)
249 XBT_INFO("Displaying host %s", host->cname());
250 XBT_INFO(" - speed: %.0f", host->speed());
251 XBT_INFO(" - available speed: %.2f", sg_host_get_available_speed(host));
252 props = host->properties();
254 if (not xbt_dict_is_empty(props)) {
255 XBT_INFO(" - properties:");
256 xbt_dict_cursor_t cursor = nullptr;
260 xbt_dict_foreach(props,cursor,key,data) {
261 XBT_INFO(" %s->%s",key,data);