1 /* Copyright (c) 2017-2019. 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 "src/surf/network_interface.hpp"
10 #include "src/surf/surf_interface.hpp"
11 #include "surf/surf.hpp"
13 #include <boost/algorithm/string/classification.hpp>
14 #include <boost/algorithm/string/split.hpp>
16 SIMGRID_REGISTER_PLUGIN(link_energy, "Link energy consumption.", &sg_link_energy_plugin_init)
18 /** @defgroup plugin_link_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="wattage_range" value="100.0:200.0" />
28 <prop id="wattage_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) : link_(ptr), last_updated_(surf_get_clock()) {}
52 ~LinkEnergy() = default;
54 void init_watts_range_list();
55 double get_consumed_energy();
61 simgrid::s4u::Link* link_{};
67 double total_energy_{0.0};
68 double last_updated_{0.0}; /*< Timestamp of the last energy update event*/
71 simgrid::xbt::Extension<simgrid::s4u::Link, LinkEnergy> LinkEnergy::EXTENSION_ID;
73 void LinkEnergy::update()
76 init_watts_range_list();
78 double power = get_power();
79 double now = surf_get_clock();
80 total_energy_ += power * (now - last_updated_);
84 void LinkEnergy::init_watts_range_list()
90 const char* all_power_values_str = this->link_->get_property("wattage_range");
91 if (all_power_values_str == nullptr) {
92 all_power_values_str = this->link_->get_property("watt_range");
93 if (all_power_values_str != nullptr)
94 XBT_WARN("Please rename the 'watt_range' property of link %s into 'wattage_range'.", link_->get_cname());
97 if (all_power_values_str == nullptr)
100 std::vector<std::string> all_power_values;
101 boost::split(all_power_values, all_power_values_str, boost::is_any_of(","));
103 for (auto current_power_values_str : all_power_values) {
104 /* retrieve the power values associated */
105 std::vector<std::string> current_power_values;
106 boost::split(current_power_values, current_power_values_str, boost::is_any_of(":"));
107 xbt_assert(current_power_values.size() == 2,
108 "Power properties incorrectly defined - could not retrieve idle and busy power values for link %s",
109 this->link_->get_cname());
111 /* min_power corresponds to the idle power (link load = 0) */
112 /* max_power is the power consumed at 100% link load */
114 idle_ = std::stod(current_power_values.front());
115 } catch (const std::invalid_argument&) {
116 throw std::invalid_argument(std::string("Invalid idle power value for link ") + this->link_->get_cname());
120 busy_ = std::stod(current_power_values.back());
121 } catch (const std::invalid_argument&) {
122 throw std::invalid_argument(std::string("Invalid busy power value for link ") + this->link_->get_cname());
127 double LinkEnergy::get_power()
133 double power_slope = busy_ - idle_;
135 double normalized_link_usage = link_->get_usage() / link_->get_bandwidth();
136 double dynamic_power = power_slope * normalized_link_usage;
138 return idle_ + dynamic_power;
141 double LinkEnergy::get_consumed_energy()
143 if (last_updated_ < surf_get_clock()) // We need to simcall this as it modifies the environment
144 simgrid::kernel::actor::simcall(std::bind(&LinkEnergy::update, this));
145 return this->total_energy_;
147 } // namespace plugin
148 } // namespace simgrid
150 using simgrid::plugin::LinkEnergy;
152 /* **************************** events callback *************************** */
153 static void on_communicate(simgrid::kernel::resource::NetworkAction const& action, simgrid::s4u::Host*,
156 XBT_DEBUG("onCommunicate is called");
157 for (simgrid::kernel::resource::LinkImpl* link : action.links()) {
162 XBT_DEBUG("Update link %s", link->get_cname());
163 LinkEnergy* link_energy = link->get_iface()->extension<LinkEnergy>();
164 link_energy->init_watts_range_list();
165 link_energy->update();
169 static void on_simulation_end()
171 std::vector<simgrid::s4u::Link*> links = simgrid::s4u::Engine::get_instance()->get_all_links();
173 double total_energy = 0.0; // Total dissipated energy (whole platform)
174 for (const auto link : links) {
175 double link_energy = link->extension<LinkEnergy>()->get_consumed_energy();
176 total_energy += link_energy;
179 XBT_INFO("Total energy over all links: %f", total_energy);
181 /* **************************** Public interface *************************** */
183 int sg_link_energy_is_inited()
185 return LinkEnergy::EXTENSION_ID.valid();
187 /** @ingroup plugin_link_energy
188 * @brief Enable energy plugin
189 * @details Enable energy plugin to get joules consumption of each cpu. You should call this function before
192 void sg_link_energy_plugin_init()
194 if (LinkEnergy::EXTENSION_ID.valid())
196 LinkEnergy::EXTENSION_ID = simgrid::s4u::Link::extension_create<LinkEnergy>();
198 xbt_assert(sg_host_count() == 0, "Please call sg_link_energy_plugin_init() before initializing the platform.");
200 simgrid::s4u::Link::on_creation.connect([](simgrid::s4u::Link& link) { link.extension_set(new LinkEnergy(&link)); });
202 simgrid::s4u::Link::on_state_change.connect(
203 [](simgrid::s4u::Link const& link) { link.extension<LinkEnergy>()->update(); });
205 simgrid::s4u::Link::on_destruction.connect([](simgrid::s4u::Link const& link) {
206 if (link.get_name() != "__loopback__")
207 XBT_INFO("Energy consumption of link '%s': %f Joules", link.get_cname(),
208 link.extension<LinkEnergy>()->get_consumed_energy());
211 simgrid::s4u::Link::on_communication_state_change.connect([](
212 simgrid::kernel::resource::NetworkAction const& action, simgrid::kernel::resource::Action::State /* previous */) {
213 for (simgrid::kernel::resource::LinkImpl* link : action.links()) {
215 link->get_iface()->extension<LinkEnergy>()->update();
219 simgrid::s4u::Link::on_communicate.connect(&on_communicate);
220 simgrid::s4u::Engine::on_simulation_end.connect(&on_simulation_end);
223 /** @ingroup plugin_link_energy
224 * @brief Returns the total energy consumed by the link so far (in Joules)
226 * Please note that since the consumption is lazily updated, it may require a simcall to update it.
227 * The result is that the actor requesting this value will be interrupted,
228 * the value will be updated in kernel mode before returning the control to the requesting actor.
230 double sg_link_get_consumed_energy(sg_link_t link)
232 if (not LinkEnergy::EXTENSION_ID.valid())
233 throw simgrid::xbt::InitializationError("The Energy plugin is not active. Please call sg_link_energy_plugin_init() "
234 "before calling sg_link_get_consumed_energy().");
235 return link->extension<LinkEnergy>()->get_consumed_energy();