-/* Copyright (c) 2013-2019. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2013-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "src/surf/surf_interface.hpp"
#include "surf/surf.hpp"
+#include <numeric>
+
#ifndef NETWORK_INTERFACE_CPP_
#define NETWORK_INTERFACE_CPP_
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf, "Logging specific to the SURF network module");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_network, ker_resource, "Network resources, that fuel communications");
/*********
* Model *
*********/
-simgrid::kernel::resource::NetworkModel* surf_network_model = nullptr;
-
namespace simgrid {
namespace kernel {
namespace resource {
/** @brief Command-line option 'network/TCP-gamma' -- see @ref options_model_network_gamma */
-simgrid::config::Flag<double> NetworkModel::cfg_tcp_gamma(
- "network/TCP-gamma", {"network/TCP_gamma"},
+config::Flag<double> NetworkModel::cfg_tcp_gamma(
+ "network/TCP-gamma",
"Size of the biggest TCP window (cat /proc/sys/net/ipv4/tcp_[rw]mem for recv/send window; "
"Use the last given value, which is the max window size)",
4194304.0);
/** @brief Command-line option 'network/crosstraffic' -- see @ref options_model_network_crosstraffic */
-simgrid::config::Flag<bool> NetworkModel::cfg_crosstraffic(
+config::Flag<bool> NetworkModel::cfg_crosstraffic(
"network/crosstraffic",
"Activate the interferences between uploads and downloads for fluid max-min models (LV08, CM02)", "yes");
NetworkModel::~NetworkModel() = default;
-double NetworkModel::get_latency_factor(double /*size*/)
-{
- return sg_latency_factor;
-}
-
-double NetworkModel::get_bandwidth_factor(double /*size*/)
-{
- return sg_bandwidth_factor;
-}
-
-double NetworkModel::get_bandwidth_constraint(double rate, double /*bound*/, double /*size*/)
-{
- return rate;
-}
-
double NetworkModel::next_occurring_event_full(double now)
{
double minRes = Model::next_occurring_event_full(now);
for (Action const& action : *get_started_action_set()) {
- const NetworkAction& net_action = static_cast<const NetworkAction&>(action);
+ const auto& net_action = static_cast<const NetworkAction&>(action);
if (net_action.latency_ > 0)
minRes = (minRes < 0) ? net_action.latency_ : std::min(minRes, net_action.latency_);
}
* Resource *
************/
-LinkImpl::LinkImpl(NetworkModel* model, const std::string& name, lmm::Constraint* constraint)
- : Resource(model, name, constraint), piface_(this)
+LinkImpl::LinkImpl(const std::string& name) : Resource_T(name), piface_(this)
{
-
if (name != "__loopback__")
xbt_assert(not s4u::Link::by_name_or_null(name), "Link '%s' declared several times in the platform.", name.c_str());
- latency_.scale = 1;
- bandwidth_.scale = 1;
-
s4u::Engine::get_instance()->link_register(name, &piface_);
XBT_DEBUG("Create link '%s'", name.c_str());
}
-/** @brief use destroy() instead of this destructor */
-LinkImpl::~LinkImpl()
-{
- xbt_assert(currently_destroying_, "Don't delete Links directly. Call destroy() instead.");
-}
/** @brief Fire the required callbacks and destroy the object
*
* Don't delete directly a Link, call l->destroy() instead.
*/
void LinkImpl::destroy()
{
- if (not currently_destroying_) {
- currently_destroying_ = true;
- s4u::Link::on_destruction(this->piface_);
- delete this;
- }
+ s4u::Link::on_destruction(this->piface_);
+ delete this;
}
-bool LinkImpl::is_used()
+bool LinkImpl::is_used() const
{
return get_model()->get_maxmin_system()->constraint_used(get_constraint());
}
-double LinkImpl::get_latency()
+LinkImpl* LinkImpl::set_sharing_policy(s4u::Link::SharingPolicy policy)
{
- return latency_.peak * latency_.scale;
+ get_constraint()->set_sharing_policy(policy);
+ return this;
}
-
-double LinkImpl::get_bandwidth()
+s4u::Link::SharingPolicy LinkImpl::get_sharing_policy() const
{
- return bandwidth_.peak * bandwidth_.scale;
+ return get_constraint()->get_sharing_policy();
}
-s4u::Link::SharingPolicy LinkImpl::get_sharing_policy()
+void LinkImpl::latency_check(double latency) const
{
- return get_constraint()->get_sharing_policy();
+ static double last_warned_latency = sg_surf_precision;
+ if (latency != 0.0 && latency < last_warned_latency) {
+ XBT_WARN("Latency for link %s is smaller than surf/precision (%g < %g)."
+ " For more accuracy, consider setting \"--cfg=surf/precision:%g\".",
+ get_cname(), latency, sg_surf_precision, latency);
+ last_warned_latency = latency;
+ }
}
void LinkImpl::turn_on()
{
if (not is_on()) {
Resource::turn_on();
- s4u::Link::on_state_change(this->piface_);
+ s4u::Link::on_state_change(piface_);
}
}
{
if (is_on()) {
Resource::turn_off();
- s4u::Link::on_state_change(this->piface_);
+ s4u::Link::on_state_change(piface_);
- kernel::lmm::Variable* var = nullptr;
const kernel::lmm::Element* elem = nullptr;
double now = surf_get_clock();
- while ((var = get_constraint()->get_variable(&elem))) {
- Action* action = static_cast<Action*>(var->get_id());
+ while (const auto* var = get_constraint()->get_variable(&elem)) {
+ Action* action = var->get_id();
if (action->get_state() == Action::State::INITED || action->get_state() == Action::State::STARTED) {
action->set_finish_time(now);
action->set_state(Action::State::FAILED);
}
}
-void LinkImpl::on_bandwidth_change()
+void LinkImpl::seal()
+{
+ if (is_sealed())
+ return;
+
+ xbt_assert(this->get_model(), "Cannot seal Link(%s) without setting the Network model first", this->get_cname());
+ Resource::seal();
+ s4u::Link::on_creation(piface_);
+}
+
+void LinkImpl::on_bandwidth_change() const
{
- s4u::Link::on_bandwidth_change(this->piface_);
+ s4u::Link::on_bandwidth_change(piface_);
}
-void LinkImpl::set_bandwidth_profile(profile::Profile* profile)
+LinkImpl* LinkImpl::set_bandwidth_profile(profile::Profile* profile)
{
- xbt_assert(bandwidth_.event == nullptr, "Cannot set a second bandwidth profile to Link %s", get_cname());
- bandwidth_.event = profile->schedule(&profile::future_evt_set, this);
+ if (profile) {
+ xbt_assert(bandwidth_.event == nullptr, "Cannot set a second bandwidth profile to Link %s", get_cname());
+ bandwidth_.event = profile->schedule(&profile::future_evt_set, this);
+ }
+ return this;
}
-void LinkImpl::set_latency_profile(profile::Profile* profile)
+LinkImpl* LinkImpl::set_latency_profile(profile::Profile* profile)
{
- xbt_assert(latency_.event == nullptr, "Cannot set a second latency profile to Link %s", get_cname());
- latency_.event = profile->schedule(&profile::future_evt_set, this);
+ if (profile) {
+ xbt_assert(latency_.event == nullptr, "Cannot set a second latency profile to Link %s", get_cname());
+ latency_.event = profile->schedule(&profile::future_evt_set, this);
+ }
+ return this;
+}
+
+void LinkImpl::set_concurrency_limit(int limit) const
+{
+ if (limit != -1) {
+ get_constraint()->reset_concurrency_maximum();
+ }
+ get_constraint()->set_concurrency_limit(limit);
}
/**********
void NetworkAction::set_state(Action::State state)
{
Action::State previous = get_state();
- Action::set_state(state);
- if (previous != state) // Trigger only if the state changed
+ if (previous != state) { // Trigger only if the state changed
+ Action::set_state(state);
s4u::Link::on_communication_state_change(*this, previous);
+ }
}
/** @brief returns a list of all Links that this action is using */
-std::list<LinkImpl*> NetworkAction::links() const
+std::list<LinkImpl*> NetworkAction::get_links() const
{
std::list<LinkImpl*> retlist;
int llen = get_variable()->get_number_of_constraint();
for (int i = 0; i < llen; i++) {
/* Beware of composite actions: ptasks put links and cpus together */
- // extra pb: we cannot dynamic_cast from void*...
- Resource* resource = get_variable()->get_constraint(i)->get_id();
- LinkImpl* link = dynamic_cast<LinkImpl*>(resource);
- if (link != nullptr)
+ if (auto* link = dynamic_cast<LinkImpl*>(get_variable()->get_constraint(i)->get_id()))
retlist.push_back(link);
}
return retlist;
}
+
+static void add_latency(const std::vector<LinkImpl*>& links, double* latency)
+{
+ if (latency)
+ *latency = std::accumulate(begin(links), end(links), *latency,
+ [](double lat, const auto* link) { return lat + link->get_latency(); });
+}
+
+void add_link_latency(std::vector<LinkImpl*>& result, LinkImpl* link, double* latency)
+{
+ result.push_back(link);
+ if (latency)
+ *latency += link->get_latency();
}
-} // namespace kernel
+
+void add_link_latency(std::vector<LinkImpl*>& result, const std::vector<LinkImpl*>& links, double* latency)
+{
+ result.insert(result.end(), begin(links), end(links));
+ add_latency(links, latency);
}
+void insert_link_latency(std::vector<LinkImpl*>& result, const std::vector<LinkImpl*>& links, double* latency)
+{
+ result.insert(result.begin(), rbegin(links), rend(links));
+ add_latency(links, latency);
+}
+
+} // namespace resource
+} // namespace kernel
+} // namespace simgrid
+
#endif /* NETWORK_INTERFACE_CPP_ */
