1 /* Copyright (c) 2013-2023. 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/s4u/Engine.hpp>
8 #include "src/kernel/resource/FactorSet.hpp"
9 #include "src/kernel/resource/NetworkModel.hpp"
10 #include "src/kernel/resource/profile/Profile.hpp"
11 #include "src/simgrid/sg_config.hpp"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_network, ker_resource, "Network resources, that fuel communications");
21 namespace simgrid::kernel::resource {
23 /** @brief Command-line option 'network/TCP-gamma' -- see @ref options_model_network_gamma */
24 config::Flag<double> NetworkModel::cfg_tcp_gamma(
26 "Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; "
27 "Use the last given value, which is the max window size)",
30 /** @brief Command-line option 'network/crosstraffic' -- see @ref options_model_network_crosstraffic */
31 config::Flag<bool> NetworkModel::cfg_crosstraffic(
32 "network/crosstraffic",
33 "Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)", "yes");
35 config::Flag<double> NetworkModel::cfg_weight_S_parameter(
37 "Correction factor to apply to the weight of competing streams (default value set by network model)", 0.0);
39 NetworkModel::~NetworkModel() = default;
41 double NetworkModel::next_occurring_event_full(double now)
43 double minRes = Model::next_occurring_event_full(now);
45 for (Action const& action : *get_started_action_set()) {
46 const auto& net_action = static_cast<const NetworkAction&>(action);
47 if (net_action.latency_ > 0)
48 minRes = (minRes < 0) ? net_action.latency_ : std::min(minRes, net_action.latency_);
51 XBT_DEBUG("Min of share resources %f", minRes);
60 void NetworkAction::set_state(Action::State state)
62 Action::State previous = get_state();
63 if (previous != state) { // Trigger only if the state changed
64 Action::set_state(state);
65 s4u::Link::on_communication_state_change(*this, previous);
69 /** @brief returns a list of all Links that this action is using */
70 std::list<StandardLinkImpl*> NetworkAction::get_links() const
72 std::list<StandardLinkImpl*> retlist;
73 int llen = get_variable()->get_number_of_constraint();
75 for (int i = 0; i < llen; i++) {
76 /* Beware of composite actions: ptasks put links and cpus together */
77 if (auto* link = dynamic_cast<StandardLinkImpl*>(get_variable()->get_constraint(i)->get_id()))
78 retlist.push_back(link);
84 static void add_latency(const std::vector<StandardLinkImpl*>& links, double* latency)
87 *latency = std::accumulate(begin(links), end(links), *latency,
88 [](double lat, const auto* link) { return lat + link->get_latency(); });
91 void add_link_latency(std::vector<StandardLinkImpl*>& result, StandardLinkImpl* link, double* latency)
93 result.push_back(link);
95 *latency += link->get_latency();
98 void add_link_latency(std::vector<StandardLinkImpl*>& result, const std::vector<StandardLinkImpl*>& links,
101 result.insert(result.end(), begin(links), end(links));
102 add_latency(links, latency);
105 void insert_link_latency(std::vector<StandardLinkImpl*>& result, const std::vector<StandardLinkImpl*>& links,
108 result.insert(result.begin(), rbegin(links), rend(links));
109 add_latency(links, latency);
112 } // namespace simgrid::kernel::resource