1 /* Copyright (c) 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. */
6 #include "simgrid/plugins/energy.h"
7 #include "simgrid/s4u/Engine.hpp"
8 #include "simgrid/simix.hpp"
9 #include "src/surf/network_interface.hpp"
10 #include <boost/algorithm/string/classification.hpp>
11 #include <boost/algorithm/string/split.hpp>
17 /** @addtogroup SURF_plugin_energy
20 This is the link energy plugin, accounting for the dissipated energy in the simulated platform.
22 The energy consumption of a link depends directly on its current traffic load. Specify that consumption in your
23 platform file as follows:
26 <link id="SWITCH1" bandwidth="125Mbps" latency="5us" sharing_policy="SHARED" >
27 <prop id="watt_range" value="100.0:200.0" />
28 <prop id="watt_off" value="10" />
32 The first property means that when your link is switched on, but without anything to do, it will dissipate 100 Watts.
33 If it's fully loaded, it will dissipate 200 Watts. If its load is at 50%, then it will dissipate 150 Watts.
34 The second property means that when your host is turned off, it will dissipate only 10 Watts (please note that these
35 values are arbitrary).
37 To simulate the energy-related elements, first call the simgrid#energy#sg_link_energy_plugin_init() before your
39 and then use the following function to retrieve the consumption of a given link: sg_link_get_consumed_energy().
42 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(link_energy, surf, "Logging specific to the SURF LinkEnergy plugin");
49 static simgrid::xbt::Extension<simgrid::s4u::Link, LinkEnergy> EXTENSION_ID;
51 explicit LinkEnergy(simgrid::s4u::Link* ptr);
54 void initWattsRangeList();
55 double getTotalEnergy();
61 simgrid::s4u::Link* link_{};
67 double totalEnergy_{0.0};
68 double lastUpdated_{0.0}; /*< Timestamp of the last energy update event*/
71 simgrid::xbt::Extension<simgrid::s4u::Link, LinkEnergy> LinkEnergy::EXTENSION_ID;
73 LinkEnergy::LinkEnergy(simgrid::s4u::Link* ptr) : link_(ptr), lastUpdated_(surf_get_clock())
77 LinkEnergy::~LinkEnergy() = default;
79 void LinkEnergy::update()
81 double power = getPower();
82 double now = surf_get_clock();
83 totalEnergy_ += power * (now - lastUpdated_);
87 void LinkEnergy::initWattsRangeList()
94 const char* all_power_values_str = this->link_->getProperty("watt_range");
96 if (all_power_values_str == nullptr)
99 std::vector<std::string> all_power_values;
100 boost::split(all_power_values, all_power_values_str, boost::is_any_of(","));
102 for (auto current_power_values_str : all_power_values) {
103 /* retrieve the power values associated */
104 std::vector<std::string> current_power_values;
105 boost::split(current_power_values, current_power_values_str, boost::is_any_of(":"));
106 xbt_assert(current_power_values.size() == 2,
107 "Power properties incorrectly defined - could not retrieve idle and busy power values for link %s",
108 this->link_->getCname());
110 /* min_power corresponds to the idle power (link load = 0) */
111 /* max_power is the power consumed at 100% link load */
112 char* idleMsg = bprintf("Invalid idle power value for link%s", this->link_->getCname());
113 char* busyMsg = bprintf("Invalid busy power value for %s", this->link_->getCname());
115 idle_ = xbt_str_parse_double((current_power_values.at(0)).c_str(), idleMsg);
116 busy_ = xbt_str_parse_double((current_power_values.at(1)).c_str(), busyMsg);
124 double LinkEnergy::getPower()
130 double power_slope = busy_ - idle_;
132 double normalized_link_usage = link_->getUsage() / link_->bandwidth();
133 double dynamic_power = power_slope * normalized_link_usage;
135 return idle_ + dynamic_power;
138 double LinkEnergy::getTotalEnergy()
141 return this->totalEnergy_;
146 using simgrid::plugin::LinkEnergy;
148 /* **************************** events callback *************************** */
149 static void onCreation(simgrid::s4u::Link& link)
151 XBT_DEBUG("onCreation is called for link: %s", link.getCname());
152 link.extension_set(new LinkEnergy(&link));
155 static void onCommunicate(simgrid::surf::NetworkAction* action, simgrid::s4u::Host* src, simgrid::s4u::Host* dst)
157 XBT_DEBUG("onCommunicate is called");
158 for (simgrid::surf::LinkImpl* link : action->links()) {
163 XBT_DEBUG("Update link %s", link->getCname());
164 // Get the link_energy extension for the relevant link
165 LinkEnergy* link_energy = link->piface_.extension<LinkEnergy>();
166 link_energy->initWattsRangeList();
167 link_energy->update();
171 static void onActionStateChange(simgrid::surf::NetworkAction* action)
173 XBT_DEBUG("onActionStateChange is called");
174 for (simgrid::surf::LinkImpl* link : action->links()) {
179 // Get the link_energy extension for the relevant link
180 LinkEnergy* link_energy = link->piface_.extension<LinkEnergy>();
181 link_energy->update();
185 static void onLinkStateChange(simgrid::s4u::Link& link)
187 XBT_DEBUG("onLinkStateChange is called for link: %s", link.getCname());
189 LinkEnergy* link_energy = link.extension<LinkEnergy>();
190 link_energy->update();
193 static void onLinkDestruction(simgrid::s4u::Link& link)
195 XBT_DEBUG("onLinkDestruction is called for link: %s", link.getCname());
197 LinkEnergy* link_energy = link.extension<LinkEnergy>();
198 link_energy->update();
201 static void computeAndDisplayTotalEnergy()
203 std::vector<simgrid::s4u::Link*> link_list;
204 simgrid::s4u::Engine::getInstance()->getLinkList(&link_list);
205 double total_energy = 0.0; // Total dissipated energy (whole platform)
206 for (const auto link : link_list) {
207 LinkEnergy* link_energy = link->extension<LinkEnergy>();
209 double a_link_total_energy = link_energy->getTotalEnergy();
210 total_energy += a_link_total_energy;
211 const char* name = link->getCname();
212 if (strcmp(name, "__loopback__"))
213 XBT_INFO("Link '%s' total consumption: %f", name, a_link_total_energy);
216 XBT_INFO("Total energy over all links: %f", total_energy);
219 static void onSimulationEnd()
221 computeAndDisplayTotalEnergy();
223 /* **************************** Public interface *************************** */
225 /** \ingroup SURF_plugin_energy
226 * \brief Enable energy plugin
227 * \details Enable energy plugin to get joules consumption of each cpu. You should call this function before
230 void sg_link_energy_plugin_init()
233 if (LinkEnergy::EXTENSION_ID.valid())
235 LinkEnergy::EXTENSION_ID = simgrid::s4u::Link::extension_create<LinkEnergy>();
237 simgrid::s4u::Link::onCreation.connect(&onCreation);
238 simgrid::s4u::Link::onStateChange.connect(&onLinkStateChange);
239 simgrid::s4u::Link::onDestruction.connect(&onLinkDestruction);
240 simgrid::s4u::Link::onCommunicationStateChange.connect(&onActionStateChange);
241 simgrid::s4u::Link::onCommunicate.connect(&onCommunicate);
242 simgrid::s4u::onSimulationEnd.connect(&onSimulationEnd);