1 /* Copyright (c) 2017-2020. 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. */
6 #include "simgrid/Exception.hpp"
7 #include "simgrid/plugins/energy.h"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "simgrid/s4u/Host.hpp"
10 #include "simgrid/s4u/Link.hpp"
11 #include "src/surf/network_interface.hpp"
12 #include "src/surf/network_wifi.hpp"
13 #include "src/surf/surf_interface.hpp"
14 #include "surf/surf.hpp"
15 #include "src/kernel/lmm/maxmin.hpp"
16 #include "xbt/config.hpp"
18 #include <boost/algorithm/string/classification.hpp>
19 #include <boost/algorithm/string/split.hpp>
22 SIMGRID_REGISTER_PLUGIN(link_energy_wifi, "Energy wifi test", &sg_wifi_energy_plugin_init);
23 /** @degroup plugin_link_energy_wifi Plugin WiFi energy
25 * This is the WiFi energy plugin, accounting for the dissipated energy of WiFi links.
28 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(link_energy_wifi, surf, "Logging specific to the link energy wifi plugin");
33 class XBT_PRIVATE LinkEnergyWifi {
35 static simgrid::xbt::Extension<simgrid::s4u::Link, LinkEnergyWifi> EXTENSION_ID;
37 explicit LinkEnergyWifi(simgrid::s4u::Link* ptr) : link_(ptr) {}
39 ~LinkEnergyWifi() = default;
40 LinkEnergyWifi() = delete;
43 * Update the energy consumed by link_ when transmissions start or end
45 void update(const simgrid::kernel::resource::NetworkAction &);
48 * Update the energy consumed when link_ is destroyed
50 void update_destroy();
53 * Fetches energy consumption values from the platform file.
54 * The user can specify:
55 * - wifi_watt_values: energy consumption in each state (IDLE:Tx:Rx:SLEEP)
56 * default: 0.82:1.14:0.94:0.10
57 * - controlDuration: duration of active beacon transmissions per second
60 void init_watts_range_list();
62 double get_consumed_energy(void) const { return eDyn_ + eStat_; }
63 /** Get the dynamic part of the energy for this link */
64 double get_energy_dynamic(void) const { return eDyn_; }
65 double get_energy_static(void) const { return eStat_; }
66 double get_duration_comm(void) const { return dur_TxRx_; }
67 double get_duration_idle(void) const { return dur_idle_; }
69 /** Set the power consumed by this link while idle */
70 void set_power_idle(double value) { pIdle_ = value; }
71 /** Set the power consumed by this link while transmitting */
72 void set_power_tx(double value) { pTx_ = value; }
73 /** Set the power consumed by this link while receiving */
74 void set_power_rx(double value) { pRx_ = value; }
75 /** Set the power consumed by this link while sleeping */
76 void set_power_sleep(double value) { pSleep_ = value; }
79 // associative array keeping size of data already sent for a given flow (required for interleaved actions)
80 std::map<simgrid::kernel::resource::NetworkWifiAction*, std::pair<int, double>> flowTmp{};
82 // WiFi link the plugin instance is attached to
85 // dynamic energy accumulated since the simulation start (active durations consumption)
87 // static energy (no activity consumption)
90 // duration since previous energy update
91 double prev_update_{0.0};
93 // Same energy calibration values as ns3 by default
94 // https://www.nsnam.org/docs/release/3.30/doxygen/classns3_1_1_wifi_radio_energy_model.html#details
100 // constant taking beacons into account (can be specified by the user)
101 double control_duration_{0.0036};
103 // Measurements for report
104 double dur_TxRx_{0}; // Duration of transmission
105 double dur_idle_{0}; // Duration of idle time
106 bool valuesInit_{false};
109 xbt::Extension<s4u::Link, LinkEnergyWifi> LinkEnergyWifi::EXTENSION_ID;
111 void LinkEnergyWifi::update_destroy()
113 auto const* wifi_link = static_cast<simgrid::kernel::resource::NetworkWifiLink*>(link_->get_impl());
114 double duration = surf_get_clock() - prev_update_;
115 prev_update_ = surf_get_clock();
117 dur_idle_ += duration;
119 // add IDLE energy usage, as well as beacons consumption since previous update
120 eDyn_ += duration * control_duration_ * wifi_link->get_host_count() * pRx_;
121 eStat_ += (duration - (duration * control_duration_)) * pIdle_ * (wifi_link->get_host_count() + 1);
123 XBT_DEBUG("finish eStat_ += %f * %f * (%d+1) | eStat = %f", duration, pIdle_, wifi_link->get_host_count(), eStat_);
126 void LinkEnergyWifi::update(const simgrid::kernel::resource::NetworkAction&)
128 init_watts_range_list();
130 double duration = surf_get_clock() - prev_update_;
131 prev_update_ = surf_get_clock();
133 // we don't update for null durations
137 auto const* wifi_link = static_cast<simgrid::kernel::resource::NetworkWifiLink*>(link_->get_impl());
139 const kernel::lmm::Variable* var;
140 const kernel::lmm::Element* elem = nullptr;
143 * We update the energy consumed by each flow active on the link since the previous update.
145 * To do this, we need to know how much time each flow has been effectively sending data on the WiFi link since the
146 * previous update (durUsage). We compute this value using the size of the flow, the amount of data already spent
147 * (using flowTmp), as well as the bandwidth used by the flow since the previous update (using LMM variables). Since
148 * flows are sharing the medium, the total active duration on the link is equal to the transmission/reception duration
149 * used by the flow with the longest active time since the previous update
152 while((var = wifi_link->get_constraint()->get_variable(&elem))) {
153 auto* action = static_cast<kernel::resource::NetworkWifiAction*>(var->get_id());
154 XBT_DEBUG("cost: %f action value: %f link rate 1: %f link rate 2: %f", action->get_cost(), action->get_variable()->get_value(), wifi_link->get_host_rate(&action->get_src()),wifi_link->get_host_rate(&action->get_dst()));
156 if(action->get_variable()->get_value()) {
157 auto it = flowTmp.find(action);
159 // if the flow has not been registered, initialize it: 0 bytes sent, and not updated since its creation timestamp
160 if(it == flowTmp.end())
161 flowTmp[action] = std::pair<int,double>(0, action->get_start_time());
163 it = flowTmp.find(action);
166 * The active duration of the link is equal to the amount of data it had to send divided by the bandwidth on the link.
167 * If this is longer than the duration since the previous update, active duration = now - previous_update
169 double du = // durUsage on the current flow
170 (action->get_cost() - it->second.first) / action->get_variable()->get_value();
172 if(du > surf_get_clock()-it->second.second)
173 du = surf_get_clock()-it->second.second;
175 // if the flow has been more active than the others
179 // update the amount of data already sent by the flow
180 it->second.first += du*action->get_variable()->get_value();
181 it->second.second = surf_get_clock();
183 // important: if the transmission finished, remove it (needed for performance and multi-message flows)
184 if(it->second.first >= action->get_cost())
189 XBT_DEBUG("durUsage: %f", durUsage);
192 eDyn_ += duration * control_duration_ * wifi_link->get_host_count() * pRx_;
195 * Same principle as ns3:
196 * - if tx or rx, update P_{dyn}
197 * - if idle i.e. get_usage = 0, update P_{stat}
198 * P_{tot} = P_{dyn}+P_{stat}
200 if(link_->get_usage()){
201 eDyn_ += /*duration * */ durUsage * ((wifi_link->get_host_count() * pRx_) + pTx_);
202 eStat_ += (duration - durUsage) * pIdle_ * (wifi_link->get_host_count() + 1);
203 XBT_DEBUG("eDyn += %f * ((%d * %f) + %f) | eDyn = %f (durusage =%f)", durUsage, wifi_link->get_host_count(), pRx_,
204 pTx_, eDyn_, durUsage);
205 dur_TxRx_ += duration;
207 dur_idle_ += duration;
208 eStat_ += (duration - (duration * control_duration_)) * pIdle_ * (wifi_link->get_host_count() + 1);
211 XBT_DEBUG("eStat_ += %f * %f * (%d+1) | eStat = %f", duration, pIdle_, wifi_link->get_host_count(), eStat_);
214 void LinkEnergyWifi::init_watts_range_list()
221 Set to 0 if you do not want to compute beacons,
222 otherwise to the duration of beacons transmissions per second
224 const char* beacons_factor = this->link_->get_property("control_duration");
225 if(beacons_factor != nullptr) {
227 control_duration_ = std::stod(beacons_factor);
228 } catch (const std::invalid_argument&) {
229 throw std::invalid_argument(std::string("Invalid beacons factor value for link ") + this->link_->get_cname());
233 const char* all_power_values_str = this->link_->get_property("wifi_watt_values");
234 if (all_power_values_str != nullptr)
236 std::vector<std::string> all_power_values;
237 boost::split(all_power_values, all_power_values_str, boost::is_any_of(","));
239 for (auto current_power_values_str : all_power_values) {
240 /* retrieve the power values associated */
241 std::vector<std::string> current_power_values;
242 boost::split(current_power_values, current_power_values_str, boost::is_any_of(":"));
243 xbt_assert(current_power_values.size() == 4,
244 "Power properties incorrectly defined - could not retrieve idle, Tx, Rx, Sleep power values for link %s",
245 this->link_->get_cname());
247 /* min_power corresponds to the idle power (link load = 0) */
248 /* max_power is the power consumed at 100% link load */
250 pSleep_ = std::stod(current_power_values.at(3));
251 } catch (const std::invalid_argument&) {
252 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
255 pRx_ = std::stod(current_power_values.at(2));
256 } catch (const std::invalid_argument&) {
257 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
260 pTx_ = std::stod(current_power_values.at(1));
261 } catch (const std::invalid_argument&) {
262 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
265 pIdle_ = std::stod(current_power_values.at(0));
266 } catch (const std::invalid_argument&) {
267 throw std::invalid_argument(std::string("Invalid busy power value for link ") + this->link_->get_cname());
270 XBT_DEBUG("Values aa initialized with: pSleep=%f pIdle=%f pTx=%f pRx=%f", pSleep_, pIdle_, pTx_, pRx_);
275 } // namespace plugin
276 } // namespace simgrid
278 using simgrid::plugin::LinkEnergyWifi;
280 void sg_wifi_energy_plugin_init()
282 if (LinkEnergyWifi::EXTENSION_ID.valid())
285 XBT_INFO("Activating the wifi_energy plugin.");
286 LinkEnergyWifi::EXTENSION_ID = simgrid::s4u::Link::extension_create<LinkEnergyWifi>();
289 * Attaching to events:
290 * - on_creation to initialize the plugin
291 * - on_destruction to produce final energy results
292 * - on_communication_state_change: to account the energy when communications are updated
293 * - on_communicate: ''
295 simgrid::s4u::Link::on_creation.connect([](simgrid::s4u::Link& link) {
296 // verify the link is appropriate to WiFi energy computations
297 if (link.get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
298 XBT_DEBUG("Wifi Link: %s, initialization of wifi energy plugin", link.get_cname());
299 auto* plugin = new LinkEnergyWifi(&link);
300 link.extension_set(plugin);
302 XBT_DEBUG("Not Wifi Link: %s, wifi energy on link not computed", link.get_cname());
306 simgrid::s4u::Link::on_destruction.connect([](simgrid::s4u::Link const& link) {
307 // output energy values if WiFi link
308 if (link.get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
309 link.extension<LinkEnergyWifi>()->update_destroy();
311 "Link %s destroyed, consumed: %f J dyn: %f stat: %f durIdle: %f durTxRx: %f", link.get_cname(),
312 link.extension<LinkEnergyWifi>()->get_consumed_energy(),
313 link.extension<LinkEnergyWifi>()->get_energy_dynamic(), link.extension<LinkEnergyWifi>()->get_energy_static(),
314 link.extension<LinkEnergyWifi>()->get_duration_idle(), link.extension<LinkEnergyWifi>()->get_duration_comm());
318 simgrid::s4u::Link::on_communication_state_change.connect(
319 [](simgrid::kernel::resource::NetworkAction const& action,
320 simgrid::kernel::resource::Action::State /* previous */) {
321 // update WiFi links encountered during the communication
322 for (auto const* link : action.get_links()) {
323 if (link != nullptr && link->get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
324 link->get_iface()->extension<LinkEnergyWifi>()->update(action);
329 simgrid::s4u::Link::on_communicate.connect([](const simgrid::kernel::resource::NetworkAction& action) {
330 auto const* actionWifi = dynamic_cast<const simgrid::kernel::resource::NetworkWifiAction*>(&action);
332 if (actionWifi == nullptr)
335 auto const* link_src = actionWifi->get_src_link();
336 auto const* link_dst = actionWifi->get_dst_link();
338 if(link_src != nullptr)
339 link_src->get_iface()->extension<LinkEnergyWifi>()->update(action);
340 if(link_dst != nullptr)
341 link_dst->get_iface()->extension<LinkEnergyWifi>()->update(action);