1 /* Copyright (c) 2013-2021. 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/EngineImpl.hpp"
9 #include "src/surf/LinkImpl.hpp"
13 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(res_network);
23 LinkImpl::LinkImpl(const std::string& name) : LinkImplIntf(name), piface_(this)
25 if (name != "__loopback__")
26 xbt_assert(not s4u::Link::by_name_or_null(name), "Link '%s' declared several times in the platform.", name.c_str());
28 s4u::Engine::get_instance()->link_register(name, &piface_);
29 XBT_DEBUG("Create link '%s'", name.c_str());
32 /** @brief Fire the required callbacks and destroy the object
34 * Don't delete directly a Link, call l->destroy() instead.
36 void LinkImpl::destroy()
38 s4u::Link::on_destruction(piface_);
39 s4u::Engine::get_instance()->link_unregister(get_name());
43 constexpr kernel::lmm::Constraint::SharingPolicy to_maxmin_policy(s4u::Link::SharingPolicy policy)
46 case s4u::Link::SharingPolicy::NONLINEAR:
47 return kernel::lmm::Constraint::SharingPolicy::NONLINEAR;
48 case s4u::Link::SharingPolicy::FATPIPE:
49 return kernel::lmm::Constraint::SharingPolicy::FATPIPE;
51 return kernel::lmm::Constraint::SharingPolicy::SHARED;
55 void LinkImpl::set_sharing_policy(s4u::Link::SharingPolicy policy, const s4u::NonLinearResourceCb& cb)
57 get_constraint()->set_sharing_policy(to_maxmin_policy(policy), cb);
58 sharing_policy_ = policy;
61 void LinkImpl::latency_check(double latency) const
63 static double last_warned_latency = sg_surf_precision;
64 if (latency != 0.0 && latency < last_warned_latency) {
65 XBT_WARN("Latency for link %s is smaller than surf/precision (%g < %g)."
66 " For more accuracy, consider setting \"--cfg=surf/precision:%g\".",
67 get_cname(), latency, sg_surf_precision, latency);
68 last_warned_latency = latency;
72 void LinkImpl::turn_on()
76 s4u::Link::on_state_change(piface_);
80 void LinkImpl::turn_off()
84 s4u::Link::on_state_change(piface_);
86 const kernel::lmm::Element* elem = nullptr;
87 double now = EngineImpl::get_clock();
88 while (const auto* var = get_constraint()->get_variable(&elem)) {
89 Action* action = var->get_id();
90 if (action->get_state() == Action::State::INITED || action->get_state() == Action::State::STARTED) {
91 action->set_finish_time(now);
92 action->set_state(Action::State::FAILED);
103 xbt_assert(this->get_model(), "Cannot seal Link(%s) without setting the Network model first", this->get_cname());
107 void LinkImpl::on_bandwidth_change() const
109 s4u::Link::on_bandwidth_change(piface_);
112 void LinkImpl::set_bandwidth_profile(profile::Profile* profile)
115 xbt_assert(bandwidth_.event == nullptr, "Cannot set a second bandwidth profile to Link %s", get_cname());
116 bandwidth_.event = profile->schedule(&profile::future_evt_set, this);
120 void LinkImpl::set_latency_profile(profile::Profile* profile)
123 xbt_assert(latency_.event == nullptr, "Cannot set a second latency profile to Link %s", get_cname());
124 latency_.event = profile->schedule(&profile::future_evt_set, this);
128 void LinkImpl::set_concurrency_limit(int limit) const
131 get_constraint()->reset_concurrency_maximum();
133 get_constraint()->set_concurrency_limit(limit);
136 } // namespace resource
137 } // namespace kernel
138 } // namespace simgrid