-/* Copyright (c) 2019-2022. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2019-2023. 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. */
#ifndef SURF_NETWORK_WIFI_HPP_
#define SURF_NETWORK_WIFI_HPP_
-#include <xbt/base.h>
-
#include "src/surf/network_cm02.hpp"
-#include "xbt/string.hpp"
+#include "xbt/base.h"
/***********
* Classes *
***********/
-namespace simgrid {
-namespace kernel {
-namespace resource {
+namespace simgrid::kernel::resource {
class XBT_PRIVATE WifiLinkAction;
class WifiLinkImpl : public StandardLinkImpl {
/** @brief Hold every rates association between host and links (host name, rates id) */
- std::map<xbt::string, int> host_rates_;
+ std::map<std::string, int, std::less<>> host_rates_;
/** @brief A link can have several bandwidths attached to it (mostly use by wifi model) */
std::vector<Metric> bandwidths_;
- /** @brief Should we use the decay model ? */
- bool use_decay_model_ = false;
- /** @brief Wifi maximal bit rate according to the ns-3 802.11n standard */
- const double wifi_max_rate_ = 54 * 1e6 / 8;
- /** @brief minimum bit rate observed with ns3 during our calibration experiments */
- const double wifi_min_rate_ = 41.70837 * 1e6 / 8;
- /** @brief Amount of stations used in the reference point to rescale SimGrid predictions to fit ns-3 ones */
- const int model_n_ = 5;
- /** @brief Bit rate observed on ns3 at the reference point used for rescaling */
- const double model_rate_ = 42.61438 * 1e6 / 8;
- /** @brief The bandwidth to use for each SNR level, corrected with the decay rescale mechanism */
+ bool use_callback_ = false;
+ /*
+ * Values used for the throughput degradation:
+ * ratio = x0_ + co_acc_ * nb_active_flux_ / x0_
+ **/
+ /** @brief base maximum throughput to compare to when computing the ratio */
+ const double x0_ = 5678270;
+ /** @brief linear regression factor */
+ const double co_acc_ = -5424;
+ /** @brief minimum number of concurrent flows before using the linear regression */
+ const int conc_lim_ = 20;
+ /** @brief current concurrency on the link */
+ int nb_active_flux_ = 0;
+
std::vector<Metric> decay_bandwidths_;
public:
void apply_event(kernel::profile::Event*, double) override { THROW_UNIMPLEMENTED; }
void set_bandwidth(double) override { THROW_UNIMPLEMENTED; }
void set_latency(double) override;
- void refresh_decay_bandwidths();
- bool toggle_decay_model();
+ bool toggle_callback();
+
+ static void update_bw_comm_start(const kernel::activity::CommImpl&);
+ static void update_bw_comm_end(const simgrid::kernel::resource::NetworkAction& action,
+ simgrid::kernel::resource::Action::State state);
+ void inc_active_flux();
+ void dec_active_flux();
+ static double wifi_link_dynamic_sharing(const WifiLinkImpl& link, double capacity, int n);
+ double get_max_ratio() const;
size_t get_host_count() const;
};
WifiLinkImpl* get_dst_link() const { return dst_wifi_link_; }
};
-} // namespace resource
-} // namespace kernel
-} // namespace simgrid
+} // namespace simgrid::kernel::resource
#endif