include/simgrid/plugins/battery.hpp

   1 /* Copyright (c) 2023. The SimGrid Team. All rights reserved.          */
   2
   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. */
   5
   6 #ifndef SIMGRID_PLUGINS_BATTERY_HPP_
   7 #define SIMGRID_PLUGINS_BATTERY_HPP_
   8
   9 #include <memory>
  10 #include <simgrid/kernel/resource/Model.hpp>
  11 #include <simgrid/s4u/Activity.hpp>
  12 #include <xbt/Extendable.hpp>
  13
  14 namespace simgrid::plugins {
  15
  16 class Battery;
  17 using BatteryPtr = boost::intrusive_ptr<Battery>;
  18 XBT_PUBLIC void intrusive_ptr_release(Battery* o);
  19 XBT_PUBLIC void intrusive_ptr_add_ref(Battery* o);
  20
  21 class BatteryModel : public kernel::resource::Model {
  22   std::vector<BatteryPtr> batteries_;
  23
  24 public:
  25   explicit BatteryModel();
  26
  27   void add_battery(BatteryPtr b);
  28   void update_actions_state(double now, double delta) override;
  29   double next_occurring_event(double now) override;
  30 };
  31
  32 class Battery {
  33
  34   friend BatteryModel;
  35
  36 public:
  37   enum Flow { CHARGE, DISCHARGE };
  38
  39   class Event {
  40     friend Battery;
  41
  42   private:
  43     double state_of_charge_;
  44     Flow flow_;
  45     double time_delta_ = -1;
  46     std::function<void()> callback_;
  47     bool repeat_;
  48
  49   public:
  50     Event(double state_of_charge, Flow flow, std::function<void()> callback, bool repeat);
  51     static std::shared_ptr<Event> init(double state_of_charge, Flow flow, std::function<void()> callback, bool repeat);
  52
  53     /** @ingroup plugin_battery
  54      *  @return The state of charge at which the Event will happen.
  55      *  @note For Battery::Event objects
  56      */
  57     double get_state_of_charge() { return state_of_charge_; }
  58     /** @ingroup plugin_battery
  59      *  @return The flow in which the Event will happen, either when the Battery is charging or discharging.
  60      *  @note For Battery::Event objects
  61      */
  62     Flow get_flow() { return flow_; }
  63     /** @ingroup plugin_battery
  64      *  @return The time delta until the Event happen.
  65      -1 means that is will never happen with the current state the Battery,
  66      for instance when there is no load connected to the Battery.
  67      *  @note For Battery::Event objects
  68     */
  69     double get_time_delta() { return time_delta_; }
  70     /** @ingroup plugin_battery
  71      *  @return The callback to trigger when the Event happen.
  72      *  @note For Battery::Event objects
  73      */
  74     std::function<void()> get_callback() { return callback_; }
  75     /** @ingroup plugin_battery
  76      *  @return true if its a recurrent Event.
  77      *  @note For Battery::Event objects
  78      */
  79     bool get_repeat() { return repeat_; }
  80   };
  81
  82 private:
  83   static std::shared_ptr<BatteryModel> battery_model_;
  84
  85   std::string name_;
  86   double nominal_charge_power_w_;
  87   double nominal_discharge_power_w_;
  88   double charge_efficiency_;
  89   double discharge_efficiency_;
  90   double initial_capacity_wh_;
  91   double energy_budget_j_;
  92
  93   std::map<const s4u::Host*, bool> host_loads_     = {};
  94   std::map<const std::string, double> named_loads_ = {};
  95   std::vector<std::shared_ptr<Event>> events_;
  96
  97   double capacity_wh_;
  98   double energy_stored_j_;
  99   double energy_provided_j_ = 0;
 100   double energy_consumed_j_ = 0;
 101   double last_updated_      = 0;
 102
 103   explicit Battery(const std::string& name, double state_of_charge, double nominal_charge_power_w,
 104                    double nominal_discharge_power_w, double charge_efficiency, double discharge_efficiency,
 105                    double initial_capacity_wh, int cycles);
 106   static void init_plugin();
 107   void update();
 108   double next_occurring_event();
 109
 110   std::atomic_int_fast32_t refcount_{0};
 111 #ifndef DOXYGEN
 112   friend void intrusive_ptr_release(Battery* o)
 113   {
 114     if (o->refcount_.fetch_sub(1, std::memory_order_release) == 1) {
 115       std::atomic_thread_fence(std::memory_order_acquire);
 116       delete o;
 117     }
 118   }
 119   friend void intrusive_ptr_add_ref(Battery* o) { o->refcount_.fetch_add(1, std::memory_order_relaxed); }
 120 #endif
 121
 122 public:
 123   static BatteryPtr init(const std::string& name, double state_of_charge, double nominal_charge_power_w,
 124                          double nominal_discharge_power_w, double charge_efficiency, double discharge_efficiency,
 125                          double initial_capacity_wh, int cycles);
 126   void set_load(const std::string& name, double power_w);
 127   void connect_host(s4u::Host* host, bool active = true);
 128   double get_state_of_charge();
 129   double get_state_of_health();
 130   double get_capacity();
 131   double get_energy_provided();
 132   double get_energy_consumed();
 133   double get_energy_stored(std::string unit = "J");
 134   std::shared_ptr<Event> create_event(double state_of_charge, Flow flow, std::function<void()> callback,
 135                                       bool repeat = false);
 136   std::vector<std::shared_ptr<Event>> get_events();
 137   void delete_event(std::shared_ptr<Event> event);
 138 };
 139 } // namespace simgrid::plugins
 140 #endif