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 {
36 static simgrid::xbt::Extension<simgrid::s4u::Link, LinkEnergyWifi> EXTENSION_ID;
38 explicit LinkEnergyWifi(simgrid::s4u::Link* ptr) : link_(ptr) {}
40 ~LinkEnergyWifi() = default;
41 LinkEnergyWifi() = delete;
44 * Update the energy consumed by link_ when transmissions start or end
46 void update(const simgrid::kernel::resource::NetworkAction &);
49 * Update the energy consumed when link_ is destroyed
54 * Fetches energy consumption values from the platform file.
55 * The user can specify:
56 * - wifi_watt_values: energy consumption in each state (IDLE:Tx:Rx:SLEEP)
57 * default: 0.82:1.14:0.94:0.10
58 * - controlDuration: duration of active beacon transmissions per second
61 void init_watts_range_list();
63 double getConsumedEnergy(void) { return eDyn_ + eStat_; }
64 double getEdyn(void) {return eDyn_; }
65 double getEstat(void) {return eStat_; }
66 double getDurTxRx(void){return durTxRx;}
67 double getDurIdle(void){return durIdle;}
69 void setpIdle(double value) { pIdle_ = value; }
70 void setpTx(double value) { pTx_ = value; }
71 void setpRx(double value) { pRx_ = value; }
72 void setpSleep(double value) { pSleep_ = value; }
76 // associative array keeping size of data already sent for a given flow (required for interleaved actions)
77 std::map<simgrid::kernel::resource::NetworkWifiAction*, std::pair<int, double>> flowTmp{};
79 // WiFi link the plugin instance is attached to
82 // dynamic energy (active durations consumption)
84 // static energy (no activity consumption)
87 // duration since previous energy update
88 double prev_update_{0.0};
90 // Same energy calibration values as ns3 by default
91 // https://www.nsnam.org/docs/release/3.30/doxygen/classns3_1_1_wifi_radio_energy_model.html#details
97 // constant taking beacons into account (can be specified by the user)
98 double controlDuration_{0.0036};
100 // Measurements for report
103 bool valuesInit_{false};
106 xbt::Extension<s4u::Link, LinkEnergyWifi> LinkEnergyWifi::EXTENSION_ID;
108 void LinkEnergyWifi::updateDestroy() {
109 simgrid::kernel::resource::NetworkWifiLink* wifi_link =
110 static_cast<simgrid::kernel::resource::NetworkWifiLink*>(link_->get_impl());
111 double duration = surf_get_clock() - prev_update_;
112 prev_update_ = surf_get_clock();
116 // add IDLE energy usage, as well as beacons consumption since previous update
117 eDyn_ += duration * controlDuration_ * wifi_link->get_host_count() * pRx_;
118 eStat_ += (duration - (duration * controlDuration_)) * pIdle_ * (wifi_link->get_host_count() + 1);
120 XBT_DEBUG("finish eStat_ += %f * %f * (%d+1) | eStat = %f", duration, pIdle_, wifi_link->get_host_count(), eStat_);
123 void LinkEnergyWifi::update(const simgrid::kernel::resource::NetworkAction& action) {
124 init_watts_range_list();
126 double duration = surf_get_clock() - prev_update_;
127 prev_update_ = surf_get_clock();
129 // we don't update for null durations
133 simgrid::kernel::resource::NetworkWifiLink* wifi_link =
134 static_cast<simgrid::kernel::resource::NetworkWifiLink*>(link_->get_impl());
136 const kernel::lmm::Variable* var;
137 const kernel::lmm::Element* elem = nullptr;
140 * We update the energy consumed by each flow active on the link since the previous update.
141 * To do this, we need to know how much time each flow has been effectively sending data on the WiFi link since the previous update (durUsage).
142 * We compute this value using the size of the flow,
143 * the amount of data already spent (using flowTmp),
144 * as well as the bandwidth used by the flow since the previous update (using LMM variables)
145 * Since flows are sharing the medium, the total active duration on the link is equal to the transmission/reception duration used by the flow with the longest active time since the previous update
148 while((var = wifi_link->get_constraint()->get_variable(&elem))) {
149 auto* action = static_cast<kernel::resource::NetworkWifiAction*>(var->get_id());
150 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()));
151 action->get_variable();
153 double du = 0; // durUsage on the current flow
154 std::map<simgrid::kernel::resource::NetworkWifiAction *, std::pair<int, double>>::iterator it;
156 if(action->get_variable()->get_value()) {
157 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 du = (action->get_cost()-it->second.first) / action->get_variable()->get_value();
171 if(du > surf_get_clock()-it->second.second)
172 du = surf_get_clock()-it->second.second;
174 // if the flow has been more active than the others
178 // update the amount of data already sent by the flow
179 it->second.first += du*action->get_variable()->get_value();
180 it->second.second = surf_get_clock();
182 // important: if the transmission finished, remove it (needed for performance and multi-message flows)
183 if(it->second.first >= action->get_cost())
188 XBT_DEBUG("durUsage: %f", durUsage);
191 eDyn_ += duration * controlDuration_ * wifi_link->get_host_count() * pRx_;
194 * Same principle as ns3:
195 * - if tx or rx, update P_{dyn}
196 * - if idle i.e. get_usage = 0, update P_{stat}
197 * P_{tot} = P_{dyn}+P_{stat}
199 if(link_->get_usage()){
200 eDyn_ += /*duration * */ durUsage * ((wifi_link->get_host_count() * pRx_) + pTx_);
201 eStat_ += (duration - durUsage) * pIdle_ * (wifi_link->get_host_count() + 1);
202 XBT_DEBUG("eDyn += %f * ((%d * %f) + %f) | eDyn = %f (durusage =%f)", durUsage, wifi_link->get_host_count(), pRx_,
203 pTx_, eDyn_, durUsage);
207 eStat_ += (duration - (duration * controlDuration_)) * pIdle_ * (wifi_link->get_host_count() + 1);
210 XBT_DEBUG("eStat_ += %f * %f * (%d+1) | eStat = %f", duration, pIdle_, wifi_link->get_host_count(), eStat_);
215 void LinkEnergyWifi::init_watts_range_list()
222 Set to 0 if you do not want to compute beacons,
223 otherwise to the duration of beacons transmissions per second
225 const char* beacons_factor = this->link_->get_property("control_duration");
226 if(beacons_factor != nullptr) {
228 controlDuration_ = std::stod(beacons_factor);
229 } catch (const std::invalid_argument&) {
230 throw std::invalid_argument(std::string("Invalid beacons factor value for link ") + this->link_->get_cname());
234 const char* all_power_values_str = this->link_->get_property("wifi_watt_values");
235 if (all_power_values_str != nullptr)
237 std::vector<std::string> all_power_values;
238 boost::split(all_power_values, all_power_values_str, boost::is_any_of(","));
240 for (auto current_power_values_str : all_power_values) {
241 /* retrieve the power values associated */
242 std::vector<std::string> current_power_values;
243 boost::split(current_power_values, current_power_values_str, boost::is_any_of(":"));
244 xbt_assert(current_power_values.size() == 4,
245 "Power properties incorrectly defined - could not retrieve idle, Tx, Rx, Sleep power values for link %s",
246 this->link_->get_cname());
248 /* min_power corresponds to the idle power (link load = 0) */
249 /* max_power is the power consumed at 100% link load */
251 pSleep_ = std::stod(current_power_values.at(3));
252 } catch (const std::invalid_argument&) {
253 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
256 pRx_ = std::stod(current_power_values.at(2));
257 } catch (const std::invalid_argument&) {
258 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
261 pTx_ = std::stod(current_power_values.at(1));
262 } catch (const std::invalid_argument&) {
263 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
266 pIdle_ = std::stod(current_power_values.at(0));
267 } catch (const std::invalid_argument&) {
268 throw std::invalid_argument(std::string("Invalid busy power value for link ") + this->link_->get_cname());
271 XBT_DEBUG("Values aa initialized with: pSleep=%f pIdle=%f pTx=%f pRx=%f", pSleep_, pIdle_, pTx_, pRx_);
276 } // namespace plugin
277 } // namespace simgrid
279 using simgrid::plugin::LinkEnergyWifi;
281 void sg_wifi_energy_plugin_init()
283 XBT_DEBUG("Initialization wifi_energy plugin");
285 if (LinkEnergyWifi::EXTENSION_ID.valid())
287 LinkEnergyWifi::EXTENSION_ID = simgrid::s4u::Link::extension_create<LinkEnergyWifi>();
290 * Attaching to events:
291 * - on_creation to initialize the plugin
292 * - on_destruction to produce final energy results
293 * - on_communication_state_change: to account the energy when communications are updated
294 * - on_communicate: ''
296 simgrid::s4u::Link::on_creation.connect([](simgrid::s4u::Link& link) {
297 // verify the link is appropriate to WiFi energy computations
298 if (link.get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
299 XBT_DEBUG("Wifi Link: %s, initialization of wifi energy plugin", link.get_cname());
300 LinkEnergyWifi* plugin = new LinkEnergyWifi(&link);
301 link.extension_set(plugin);
303 XBT_DEBUG("Not Wifi Link: %s, wifi energy on link not computed", link.get_cname());
307 simgrid::s4u::Link::on_destruction.connect([](simgrid::s4u::Link const& link) {
308 // output energy values if WiFi link
309 if (link.get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
310 link.extension<LinkEnergyWifi>()->updateDestroy();
311 XBT_INFO("Link %s destroyed, consumed: %f J dyn: %f stat: %f durIdle: %f durTxRx: %f", link.get_cname(),
312 link.extension<LinkEnergyWifi>()->getConsumedEnergy(),
313 link.extension<LinkEnergyWifi>()->getEdyn(),
314 link.extension<LinkEnergyWifi>()->getEstat(),
315 link.extension<LinkEnergyWifi>()->getDurIdle(),
316 link.extension<LinkEnergyWifi>()->getDurTxRx()
321 simgrid::s4u::Link::on_communication_state_change.connect(
322 [](simgrid::kernel::resource::NetworkAction const& action, simgrid::kernel::resource::Action::State previous) {
323 // update WiFi links encountered during the communication
324 for (simgrid::kernel::resource::LinkImpl* link : action.get_links()) {
325 if (link != nullptr && link->get_sharing_policy() == simgrid::s4u::Link::SharingPolicy::WIFI) {
326 link->get_iface()->extension<LinkEnergyWifi>()->update(action);
331 simgrid::s4u::Link::on_communicate.connect([](const simgrid::kernel::resource::NetworkAction& action) {
332 const simgrid::kernel::resource::NetworkWifiAction* actionWifi = dynamic_cast<const simgrid::kernel::resource::NetworkWifiAction*>(&action);
334 if(actionWifi == nullptr)
337 auto link_src = actionWifi->get_src_link();
338 auto link_dst = actionWifi->get_dst_link();
340 if(link_src != nullptr)
341 link_src->get_iface()->extension<LinkEnergyWifi>()->update(action);
342 if(link_dst != nullptr)
343 link_dst->get_iface()->extension<LinkEnergyWifi>()->update(action);