1 /* Copyright (c) 2004-2017. 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. */
9 #include "xbt/signal.hpp"
10 #include "xbt/utility.hpp"
12 #include "src/surf/surf_private.hpp"
13 #include "surf/surf.hpp"
16 #include <boost/heap/pairing_heap.hpp>
17 #include <boost/intrusive/list.hpp>
18 #include <boost/optional.hpp>
22 #include <unordered_map>
24 #define NO_MAX_DURATION -1.0
30 /* user-visible parameters */
31 XBT_PUBLIC_DATA(double) sg_maxmin_precision;
32 XBT_PUBLIC_DATA(double) sg_surf_precision;
33 XBT_PUBLIC_DATA(int) sg_concurrency_limit;
35 extern XBT_PRIVATE double sg_tcp_gamma;
36 extern XBT_PRIVATE double sg_latency_factor;
37 extern XBT_PRIVATE double sg_bandwidth_factor;
38 extern XBT_PRIVATE double sg_weight_S_parameter;
39 extern XBT_PRIVATE int sg_network_crosstraffic;
40 extern XBT_PRIVATE std::vector<std::string> surf_path;
41 extern XBT_PRIVATE std::unordered_map<std::string, tmgr_trace_t> traces_set_list;
42 extern XBT_PRIVATE std::set<std::string> watched_hosts;
44 static inline void double_update(double* variable, double value, double precision)
46 // printf("Updating %g -= %g +- %g\n",*variable,value,precision);
47 // xbt_assert(value==0 || value>precision);
48 // Check that precision is higher than the machine-dependent size of the mantissa. If not, brutal rounding may
49 // happen, and the precision mechanism is not active...
50 // xbt_assert(*variable< (2<<DBL_MANT_DIG)*precision && FLT_RADIX==2);
52 if (*variable < precision)
56 static inline int double_positive(double value, double precision)
58 return (value > precision);
61 static inline int double_equals(double value1, double value2, double precision)
63 return (fabs(value1 - value2) < precision);
67 XBT_PUBLIC(double) surf_get_clock();
69 /** \ingroup SURF_simulation
70 * \brief List of hosts that have just restarted and whose autorestart process should be restarted.
72 XBT_PUBLIC_DATA(std::vector<sg_host_t>) host_that_restart;
77 extern XBT_PRIVATE simgrid::xbt::signal<void()> surfExitCallbacks;
81 int XBT_PRIVATE __surf_is_absolute_file_path(const char *file_path);
87 enum heap_action_type{
98 /** \ingroup SURF_models
99 * \brief List of initialized models
101 XBT_PUBLIC_DATA(std::vector<surf_model_t>*) all_existing_models;
106 typedef std::pair<double, simgrid::surf::Action*> heap_element_type;
107 typedef boost::heap::pairing_heap<heap_element_type, boost::heap::constant_time_size<false>, boost::heap::stable<true>,
108 boost::heap::compare<simgrid::xbt::HeapComparator<heap_element_type>>>
111 /** @ingroup SURF_interface
112 * @brief SURF action interface class
113 * @details An action is an event generated by a resource (e.g.: a communication for the network)
115 XBT_PUBLIC_CLASS Action {
117 boost::intrusive::list_member_hook<> action_hook;
118 boost::intrusive::list_member_hook<> action_lmm_hook;
119 typedef boost::intrusive::member_hook<
120 Action, boost::intrusive::list_member_hook<>, &Action::action_hook> ActionOptions;
121 typedef boost::intrusive::list<Action, ActionOptions> ActionList;
124 ready = 0, /**< Ready */
125 running, /**< Running */
126 failed, /**< Task Failure */
127 done, /**< Completed */
128 to_free, /**< Action to free in next cleanup */
129 not_in_the_system /**< Not in the system anymore. Why did you ask ? */
132 enum class SuspendStates {
133 not_suspended = 0, /**< Action currently not suspended **/
139 * @brief Action constructor
141 * @param model The Model associated to this Action
142 * @param cost The cost of the Action
143 * @param failed If the action is impossible (e.g.: execute something on a switched off host)
145 Action(simgrid::surf::Model* model, double cost, bool failed);
148 * @brief Action constructor
150 * @param model The Model associated to this Action
151 * @param cost The cost of the Action
152 * @param failed If the action is impossible (e.g.: execute something on a switched off host)
153 * @param var The lmm variable associated to this Action if it is part of a LMM component
155 Action(simgrid::surf::Model* model, double cost, bool failed, lmm_variable_t var);
157 /** @brief Destructor */
161 * @brief Mark that the action is now finished
163 * @param state the new [state](\ref simgrid::surf::Action::State) of the current Action
165 void finish(Action::State state);
167 /** @brief Get the [state](\ref simgrid::surf::Action::State) of the current Action */
168 Action::State getState() const; /**< get the state*/
169 /** @brief Set the [state](\ref simgrid::surf::Action::State) of the current Action */
170 virtual void setState(Action::State state);
172 /** @brief Get the bound of the current Action */
173 double getBound() const;
174 /** @brief Set the bound of the current Action */
175 void setBound(double bound);
177 /** @brief Get the start time of the current action */
178 double getStartTime() const { return start_; }
179 /** @brief Get the finish time of the current action */
180 double getFinishTime() const { return finishTime_; }
182 /** @brief Get the user data associated to the current action */
183 void* getData() const { return data_; }
184 /** @brief Set the user data associated to the current action */
185 void setData(void* data) { data_ = data; }
187 /** @brief Get the cost of the current action */
188 double getCost() const { return cost_; }
189 /** @brief Set the cost of the current action */
190 void setCost(double cost) {cost_ = cost;}
192 /** @brief Update the maximum duration of the current action
193 * @param delta Amount to remove from the MaxDuration */
194 void updateMaxDuration(double delta) {double_update(&maxDuration_, delta,sg_surf_precision);}
196 /** @brief Update the remaining time of the current action
197 * @param delta Amount to remove from the remaining time */
198 void updateRemains(double delta) {double_update(&remains_, delta, sg_maxmin_precision*sg_surf_precision);}
200 /** @brief Set the remaining time of the current action */
201 void setRemains(double value) {remains_ = value;}
202 /** @brief Get the remaining time of the current action after updating the resource */
203 virtual double getRemains();
204 /** @brief Get the remaining time of the current action without updating the resource */
205 double getRemainsNoUpdate() const { return remains_; }
207 /** @brief Set the finish time of the current action */
208 void setFinishTime(double value) {finishTime_ = value;}
210 /**@brief Add a reference to the current action (refcounting) */
212 /** @brief Unref that action (and destroy it if refcount reaches 0)
213 * @return true if the action was destroyed and false if someone still has references on it
217 /** @brief Cancel the current Action if running */
218 virtual void cancel();
220 /** @brief Suspend the current Action */
221 virtual void suspend();
223 /** @brief Resume the current Action */
224 virtual void resume();
226 /** @brief Returns true if the current action is running */
227 virtual bool isSuspended();
229 /** @brief Get the maximum duration of the current action */
230 double getMaxDuration() const { return maxDuration_; }
231 /** @brief Set the maximum duration of the current Action */
232 virtual void setMaxDuration(double duration);
234 /** @brief Get the tracing category associated to the current action */
235 char* getCategory() const { return category_; }
236 /** @brief Set the tracing category of the current Action */
237 void setCategory(const char *category);
239 /** @brief Get the priority of the current Action */
240 double getPriority() const { return sharingWeight_; };
241 /** @brief Set the priority of the current Action */
242 virtual void setSharingWeight(double priority);
243 void setSharingWeightNoUpdate(double weight) { sharingWeight_ = weight; }
245 /** @brief Get the state set in which the action is */
246 ActionList* getStateSet() const { return stateSet_; };
248 simgrid::surf::Model* getModel() const { return model_; }
251 ActionList* stateSet_;
255 double sharingWeight_ = 1.0; /**< priority (1.0 by default) */
256 double maxDuration_ = NO_MAX_DURATION; /*< max_duration (may fluctuate until the task is completed) */
257 double remains_; /**< How much of that cost remains to be done in the currently running task */
258 double start_; /**< start time */
259 char *category_ = nullptr; /**< tracing category for categorized resource utilization monitoring */
261 -1; /**< finish time : this is modified during the run and fluctuates until the task is completed */
264 simgrid::surf::Model *model_;
265 void *data_ = nullptr; /**< for your convenience */
268 double lastUpdate_ = 0;
269 double lastValue_ = 0;
270 lmm_variable_t variable_ = nullptr;
271 enum heap_action_type hat_ = NOTSET;
272 boost::optional<heap_type::handle_type> heapHandle_ = boost::none;
275 virtual void updateRemainingLazy(double now) { THROW_IMPOSSIBLE; };
276 void heapInsert(heap_type& heap, double key, enum heap_action_type hat);
277 void heapRemove(heap_type& heap);
278 void heapUpdate(heap_type& heap, double key, enum heap_action_type hat);
279 void clearHeapHandle() { heapHandle_ = boost::none; }
280 lmm_variable_t getVariable() const { return variable_; }
281 void setVariable(lmm_variable_t var) { variable_ = var; }
282 double getLastUpdate() const { return lastUpdate_; }
283 void refreshLastUpdate() {lastUpdate_ = surf_get_clock();}
284 double getLastValue() const { return lastValue_; }
285 void setLastValue(double val) { lastValue_ = val; }
286 enum heap_action_type getHat() const { return hat_; }
287 bool is_linked() const { return action_lmm_hook.is_linked(); }
289 Action::SuspendStates suspended_ = Action::SuspendStates::not_suspended;
292 typedef Action::ActionList ActionList;
294 typedef boost::intrusive::member_hook<
295 Action, boost::intrusive::list_member_hook<>, &Action::action_lmm_hook> ActionLmmOptions;
296 typedef boost::intrusive::list<Action, ActionLmmOptions> ActionLmmList;
297 typedef ActionLmmList* ActionLmmListPtr;
303 /** @ingroup SURF_interface
304 * @brief SURF model interface class
305 * @details A model is an object which handle the interactions between its Resources and its Actions
307 XBT_PUBLIC_CLASS Model {
312 /** @brief Get the set of [actions](@ref Action) in *ready* state */
313 virtual ActionList* getReadyActionSet() const { return readyActionSet_; }
315 /** @brief Get the set of [actions](@ref Action) in *running* state */
316 virtual ActionList* getRunningActionSet() const { return runningActionSet_; }
318 /** @brief Get the set of [actions](@ref Action) in *failed* state */
319 virtual ActionList* getFailedActionSet() const { return failedActionSet_; }
321 /** @brief Get the set of [actions](@ref Action) in *done* state */
322 virtual ActionList* getDoneActionSet() const { return doneActionSet_; }
324 /** @brief Get the set of modified [actions](@ref Action) */
325 virtual ActionLmmListPtr getModifiedSet() const { return modifiedSet_; }
327 /** @brief Get the maxmin system of the current Model */
328 lmm_system_t getMaxminSystem() const { return maxminSystem_; }
331 * @brief Get the update mechanism of the current Model
334 e_UM_t getUpdateMechanism() const { return updateMechanism_; }
335 void setUpdateMechanism(e_UM_t mechanism) { updateMechanism_ = mechanism; }
337 /** @brief Get Action heap */
338 heap_type& getActionHeap() { return actionHeap_; }
340 double actionHeapTopDate() const { return actionHeap_.top().first; }
341 Action* actionHeapPop();
342 bool actionHeapIsEmpty() const { return actionHeap_.empty(); }
345 * @brief Share the resources between the actions
347 * @param now The current time of the simulation
348 * @return The delta of time till the next action will finish
350 virtual double nextOccuringEvent(double now);
351 virtual double nextOccuringEventLazy(double now);
352 virtual double nextOccuringEventFull(double now);
355 * @brief Update action to the current time
357 * @param now The current time of the simulation
358 * @param delta The delta of time since the last update
360 virtual void updateActionsState(double now, double delta);
361 virtual void updateActionsStateLazy(double now, double delta);
362 virtual void updateActionsStateFull(double now, double delta);
364 /** @brief Returns whether this model have an idempotent shareResource()
366 * The only model that is not is NS3: computing the next timestamp moves the model up to that point,
367 * so we need to call it only when the next timestamp of other sources is computed.
369 virtual bool nextOccuringEventIsIdempotent() { return true;}
372 ActionLmmListPtr modifiedSet_;
373 lmm_system_t maxminSystem_ = nullptr;
374 bool selectiveUpdate_;
377 e_UM_t updateMechanism_ = UM_UNDEFINED;
378 ActionList* readyActionSet_; /**< Actions in state SURF_ACTION_READY */
379 ActionList* runningActionSet_; /**< Actions in state SURF_ACTION_RUNNING */
380 ActionList* failedActionSet_; /**< Actions in state SURF_ACTION_FAILED */
381 ActionList* doneActionSet_; /**< Actions in state SURF_ACTION_DONE */
382 heap_type actionHeap_;
392 /** @ingroup SURF_interface
393 * @brief Resource which have a metric handled by a maxmin system
395 struct s_surf_metric_t {
396 double peak; /**< The peak of the metric, ie its max value */
397 double scale; /**< Current availability of the metric according to the traces, in [0,1] */
398 tmgr_trace_event_t event; /**< The associated trace event associated to the metric */
404 /** @ingroup SURF_interface
405 * @brief SURF resource interface class
406 * @details This is the ancestor class of every resources in SimGrid, such as links, CPU or storage
408 XBT_PUBLIC_CLASS Resource {
411 * @brief Constructor of LMM Resources
413 * @param model Model associated to this Resource
414 * @param name The name of the Resource
415 * @param constraint The lmm constraint associated to this Resource if it is part of a LMM component
417 Resource(Model * model, const std::string& name, lmm_constraint_t constraint);
421 /** @brief Get the Model of the current Resource */
422 Model* model() const;
424 /** @brief Get the name of the current Resource */
425 const std::string& getName() const;
426 /** @brief Get the name of the current Resource */
427 const char* getCname() const;
429 bool operator==(const Resource &other) const;
432 * @brief Apply an event of external load event to that resource
434 * @param event What happened
435 * @param value [TODO]
437 virtual void apply_event(tmgr_trace_event_t event, double value) = 0;
439 /** @brief Check if the current Resource is used (if it currently serves an action) */
440 virtual bool isUsed()=0;
442 /** @brief returns the current load (in flops per second, byte per second or similar) */
443 virtual double getLoad();
445 /** @brief Check if the current Resource is active */
446 virtual bool isOn() const;
447 /** @brief Check if the current Resource is shut down */
448 virtual bool isOff() const;
449 /** @brief Turn on the current Resource */
450 virtual void turnOn();
451 /** @brief Turn off the current Resource */
452 virtual void turnOff();
460 /** @brief Get the lmm constraint associated to this Resource if it is part of a LMM component (or null if none) */
461 lmm_constraint_t constraint() const;
464 const lmm_constraint_t constraint_ = nullptr;
471 template <> class hash<simgrid::surf::Resource> {
473 std::size_t operator()(const simgrid::surf::Resource& r) const { return (std::size_t)xbt_str_hash(r.getCname()); }
477 #endif /* SURF_MODEL_H_ */