1 /* Copyright (c) 2004-2023. 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 #ifndef SIMGRID_KERNEL_RESOURCE_ACTION_HPP
7 #define SIMGRID_KERNEL_RESOURCE_ACTION_HPP
9 #include <simgrid/forward.h>
10 #include <xbt/signal.hpp>
11 #include <xbt/utility.hpp>
13 #include <boost/heap/pairing_heap.hpp>
14 #include <boost/optional.hpp>
17 static constexpr double NO_MAX_DURATION = -1.0;
19 namespace simgrid::kernel::resource {
21 using heap_element_type = std::pair<double, Action*>;
23 boost::heap::pairing_heap<heap_element_type, boost::heap::constant_time_size<false>, boost::heap::stable<true>,
24 boost::heap::compare<simgrid::xbt::HeapComparator<heap_element_type>>>;
26 class XBT_PUBLIC ActionHeap : public heap_type {
31 latency = 100, /* this is a heap entry to warn us when the latency is paid */
32 max_duration, /* this is a heap entry to warn us when the max_duration limit (timeout) is reached */
33 normal, /* this is a normal heap entry stating the date to finish transmitting */
37 double top_date() const;
38 void insert(Action* action, double date, ActionHeap::Type type);
39 void update(Action* action, double date, ActionHeap::Type type);
40 void remove(Action* action);
44 /** @details An action is a consumption on a resource (e.g.: a communication for the network).
46 * It is related (but still different) from activities, that are the stuff on which an actor can be blocked.
48 * - A sequential execution activity encompasses 2 actions: one for the exec itself,
49 * and a time-limited sleep used as timeout detector.
50 * - A point-to-point communication activity encompasses 3 actions: one for the comm itself
51 * (which spans on all links of the path), and one infinite sleep used as failure detector
52 * on both sender and receiver hosts.
53 * - Synchronization activities may possibly be connected to no action.
56 class XBT_PUBLIC Action {
60 double sharing_penalty_ = 1.0; /**< priority (1.0 by default) */
61 double max_duration_ = NO_MAX_DURATION; /*< max_duration (may fluctuate until the task is completed) */
62 double remains_; /**< How much of that cost remains to be done in the currently running task */
63 double start_time_; /**< start time */
64 double finish_time_ = -1; /**< finish time (may fluctuate until the task is completed) */
65 std::string category_; /**< tracing category for categorized resource utilization monitoring */
69 void* data_ = nullptr; /**< for your convenience - XBT_ATTRIB_DEPRECATED_v334 */
70 activity::ActivityImpl* activity_ = nullptr;
73 double factor_ = 1.0; /**< Factor for effective rate = var->get_value() * factor_ */
74 double last_update_ = 0;
75 double last_value_ = 0;
76 lmm::Variable* variable_ = nullptr;
77 double user_bound_ = -1;
79 ActionHeap::Type type_ = ActionHeap::Type::unset;
80 boost::optional<ActionHeap::handle_type> heap_hook_ = boost::none;
81 boost::intrusive::list_member_hook<> modified_set_hook_;
82 boost::intrusive::list_member_hook<> state_set_hook_;
85 /* Lazy update needs this Set hook to maintain a list of the tracked actions */
86 bool is_within_modified_set() const { return modified_set_hook_.is_linked(); }
87 using ModifiedSet = boost::intrusive::list<
88 Action, boost::intrusive::member_hook<Action, boost::intrusive::list_member_hook<>, &Action::modified_set_hook_>>;
90 using StateSet = boost::intrusive::list<
91 Action, boost::intrusive::member_hook<Action, boost::intrusive::list_member_hook<>, &Action::state_set_hook_>>;
94 INITED, /**< Created, but not started yet */
95 STARTED, /**< Currently running */
96 FAILED, /**< either the resource failed, or the action was canceled */
97 FINISHED, /**< Successfully completed */
98 IGNORED /**< e.g. failure detectors: infinite sleep actions that are put on resources which failure should get
102 enum class SuspendStates {
103 RUNNING = 0, /**< Action currently not suspended **/
109 StateSet* state_set_;
110 Action::SuspendStates suspended_ = Action::SuspendStates::RUNNING;
114 * @brief Action constructor
116 * @param model The Model associated to this Action
117 * @param cost The cost of the Action
118 * @param failed If the action is impossible (e.g.: execute something on a switched off host)
120 Action(Model* model, double cost, bool failed);
123 * @brief Action constructor
125 * @param model The Model associated to this Action
126 * @param cost The cost of the Action
127 * @param failed If the action is impossible (e.g.: execute something on a switched off host)
128 * @param var The lmm variable associated to this Action if it is part of a LMM component
130 Action(Model* model, double cost, bool failed, lmm::Variable* var);
131 Action(const Action&) = delete;
132 Action& operator=(const Action&) = delete;
137 * @brief Mark that the action is now finished
139 * @param state the new [state](@ref simgrid::kernel::resource::Action::State) of the current Action
141 void finish(Action::State state);
143 /** @brief Get the [state](@ref simgrid::kernel::resource::Action::State) of the current Action */
144 Action::State get_state() const; /**< get the state*/
145 /** @brief Set the [state](@ref simgrid::kernel::resource::Action::State) of the current Action */
146 virtual void set_state(Action::State state);
148 /** @brief Get the bound of the current Action */
149 double get_bound() const;
150 /** @brief Set the bound of the current Action */
151 void set_bound(double bound);
153 /** @brief Get the start time of the current action */
154 double get_start_time() const { return start_time_; }
155 /** @brief Get the finish time of the current action */
156 double get_finish_time() const { return finish_time_; }
158 /** @brief Get the user data associated to the current action */
159 XBT_ATTRIB_DEPRECATED_v334("Please manifest if you actually need this function") void* get_data() const
163 /** @brief Set the user data associated to the current action */
164 XBT_ATTRIB_DEPRECATED_v334("Please manifest if you actually need this function") void set_data(void* data)
169 /** @brief Get the user data associated to the current action */
170 activity::ActivityImpl* get_activity() const { return activity_; }
171 /** @brief Set the user data associated to the current action */
172 void set_activity(activity::ActivityImpl* activity) { activity_ = activity; }
174 /** @brief Get the cost of the current action */
175 double get_cost() const { return cost_; }
176 /** @brief Set the cost of the current action */
177 void set_cost(double cost) { cost_ = cost; }
179 /** @brief Update the maximum duration of the current action
180 * @param delta Amount to remove from the MaxDuration */
181 void update_max_duration(double delta);
183 /** @brief Update the remaining time of the current action
184 * @param delta Amount to remove from the remaining time */
185 void update_remains(double delta);
187 virtual void update_remains_lazy(double now) = 0;
189 /** @brief Set the remaining time of the current action */
190 void set_remains(double value) { remains_ = value; }
192 /** @brief Get the remaining time of the current action after updating the resource */
193 virtual double get_remains();
194 /** @brief Get the remaining time of the current action without updating the resource */
195 double get_remains_no_update() const { return remains_; }
197 /** @brief Set the finish time of the current action */
198 void set_finish_time(double value) { finish_time_ = value; }
200 /**@brief Add a reference to the current action (refcounting) */
202 /** @brief Unref that action (and destroy it if refcount reaches 0)
203 * @return true if the action was destroyed and false if someone still has references on it */
206 /** @brief Cancel the current Action if running */
207 virtual void cancel();
209 /** @brief Suspend the current Action */
210 virtual void suspend();
212 /** @brief Resume the current Action */
213 virtual void resume();
215 /** @brief Returns true if the current action is suspended */
216 bool is_suspended() const { return suspended_ == SuspendStates::SUSPENDED; }
217 /** @brief Returns true if the current action is running */
218 bool is_running() const { return suspended_ == SuspendStates::RUNNING; }
220 /** @brief Get the maximum duration of the current action */
221 double get_max_duration() const { return max_duration_; }
222 /** @brief Set the maximum duration of the current Action */
223 virtual void set_max_duration(double duration);
225 /** @brief Get the tracing category associated to the current action */
226 const std::string& get_category() const { return category_; }
227 /** @brief Set the tracing category of the current Action */
228 void set_category(const std::string& category) { category_ = category; }
230 /** @brief Get the sharing_penalty (RTT or 1/thread_count) of the current Action */
231 double get_sharing_penalty() const { return sharing_penalty_; };
232 /** @brief Set the sharing_penalty (RTT or 1/thread_count) of the current Action */
233 virtual void set_sharing_penalty(double sharing_penalty);
234 void set_sharing_penalty_no_update(double sharing_penalty) { sharing_penalty_ = sharing_penalty; }
236 /** @brief Get the state set in which the action is */
237 StateSet* get_state_set() const { return state_set_; };
239 Model* get_model() const { return model_; }
241 ActionHeap::Type get_type() const { return type_; }
243 lmm::Variable* get_variable() const { return variable_; }
244 void set_variable(lmm::Variable* var) { variable_ = var; }
246 double get_user_bound() const { return user_bound_; }
247 void set_user_bound(double bound) { user_bound_ = bound; }
249 double get_last_update() const { return last_update_; }
250 void set_last_update();
253 * @brief Set a factor for this action
255 * Defines a multiplicative factor for the consumption of the underlying resource.
257 * @param factor Multiplicative factor for this action (e.g. 0.97)
259 void set_rate_factor(double factor) { factor_ = factor; }
261 * @brief Get the effective consumption rate of the resource
263 * The rate is based on the sharing given by the maxmin system underneath.
264 * However, it depends on the factor defined for this action.
266 * So, the effective rate is equal to var->get_value() * factor_
268 double get_rate() const;
269 double get_last_value() const { return last_value_; }
270 void set_last_value(double val) { last_value_ = val; }
271 void set_suspend_state(Action::SuspendStates state) { suspended_ = state; }
274 } // namespace simgrid::kernel::resource