statengine.h

// Copyright 2009-2022 NTESS. Under the terms
// of Contract DE-NA0003525 with NTESS, the U.S.
// Government retains certain rights in this software.
//
// Copyright (c) 2009-2022, NTESS
// All rights reserved.
//
// This file is part of the SST software package. For license
// information, see the LICENSE file in the top level directory of the
// distribution.

#ifndef SST_CORE_STATAPI_STATENGINE_H
#define SST_CORE_STATAPI_STATENGINE_H

#include "sst/core/clock.h"
#include "sst/core/factory.h"
#include "sst/core/oneshot.h"
#include "sst/core/sst_types.h"
#include "sst/core/statapi/statbase.h"
#include "sst/core/statapi/statfieldinfo.h"
#include "sst/core/statapi/statgroup.h"
#include "sst/core/statapi/statnull.h"
#include "sst/core/threadsafe.h"
#include "sst/core/unitAlgebra.h"

/* Forward declare for Friendship */
extern int  main(int argc, char** argv);
extern void finalize_statEngineConfig(void);

namespace SST {
class BaseComponent;
class Simulation_impl;
class ConfigGraph;
class ConfigStatGroup;
class ConfigStatOutput;
class Params;

namespace Statistics {

// template<typename T> class Statistic;
// class StatisticBase;
class StatisticOutput;

/**
    \class StatisticProcessingEngine

    An SST core component that handles timing and event processing informing
    all registered Statistics to generate their outputs at desired rates.
*/

class StatisticProcessingEngine
{
    static StatisticProcessingEngine* instance;

public:
    static StatisticProcessingEngine* getInstance() { return instance; }

    /** Called by the Components and Subcomponent to perform a statistic Output.
     * @param stat - Pointer to the statistic.
     * @param EndOfSimFlag - Indicates that the output is occurring at the end of simulation.
     */
    void performStatisticOutput(StatisticBase* stat, bool endOfSimFlag = false);

    /** Called by the Components and Subcomponent to perform a global statistic Output.
     * This routine will force ALL Components and Subcomponents to output their statistic information.
     * This may lead to unexpected results if the statistic counts or data is reset on output.
     * @param endOfSimFlag - Indicates that the output is occurring at the end of simulation.
     */
    void performGlobalStatisticOutput(bool endOfSimFlag = false);

    template <class T>
    Statistic<T>* createStatistic(
        BaseComponent* comp, const std::string& type, const std::string& statName, const std::string& statSubId,
        Params& params)
    {

        return Factory::getFactory()->CreateWithParams<Statistic<T>>(type, params, comp, statName, statSubId, params);
    }

    bool registerStatisticWithEngine(StatisticBase* stat) { return registerStatisticCore(stat); }

    uint8_t statLoadLevel() const { return m_statLoadLevel; }

    const std::vector<StatisticOutput*>& getStatOutputs() const { return m_statOutputs; }

private:
    friend class SST::Simulation_impl;
    friend int ::main(int argc, char** argv);
    friend void ::finalize_statEngineConfig(void);

    StatisticProcessingEngine();
    void setup(ConfigGraph* graph);
    ~StatisticProcessingEngine();

    static void init(ConfigGraph* graph);

    StatisticOutput* createStatisticOutput(const ConfigStatOutput& cfg);

    bool registerStatisticCore(StatisticBase* stat);

    StatisticOutput* getOutputForStatistic(const StatisticBase* stat) const;
    StatisticGroup&  getGroupForStatistic(const StatisticBase* stat) const;
    bool             addPeriodicBasedStatistic(const UnitAlgebra& freq, StatisticBase* Stat);
    bool             addEventBasedStatistic(const UnitAlgebra& count, StatisticBase* Stat);
    bool             addEndOfSimStatistic(StatisticBase* Stat);
    UnitAlgebra      getParamTime(StatisticBase* stat, const std::string& pName) const;
    void             setStatisticStartTime(StatisticBase* Stat);
    void             setStatisticStopTime(StatisticBase* Stat);

    void finalizeInitialization(); /* Called when performWireUp() finished */
    void startOfSimulation();
    void endOfSimulation();

    void performStatisticOutputImpl(StatisticBase* stat, bool endOfSimFlag);
    void performStatisticGroupOutputImpl(StatisticGroup& group, bool endOfSimFlag);

    bool           handleStatisticEngineClockEvent(Cycle_t CycleNum, SimTime_t timeFactor);
    bool           handleGroupClockEvent(Cycle_t CycleNum, StatisticGroup* group);
    void           handleStatisticEngineStartTimeEvent(SimTime_t timeFactor);
    void           handleStatisticEngineStopTimeEvent(SimTime_t timeFactor);
    StatisticBase* isStatisticInCompStatMap(
        const std::string& compName, const ComponentId_t& compId, const std::string& statName,
        const std::string& statSubId, StatisticFieldInfo::fieldType_t fieldType);
    void addStatisticToCompStatMap(StatisticBase* Stat, StatisticFieldInfo::fieldType_t fieldType);
    void castError(const std::string& type, const std::string& statName, const std::string& fieldName);

private:
    typedef std::vector<StatisticBase*>           StatArray_t;   /*!< Array of Statistics */
    typedef std::map<SimTime_t, StatArray_t*>     StatMap_t;     /*!< Map of simtimes to Statistic Arrays */
    typedef std::map<ComponentId_t, StatArray_t*> CompStatMap_t; /*!< Map of ComponentId's to StatInfo Arrays */

    StatArray_t   m_EventStatisticArray;  /*!< Array of Event Based Statistics */
    StatMap_t     m_PeriodicStatisticMap; /*!< Map of Array's of Periodic Based Statistics */
    StatMap_t     m_StartTimeMap;         /*!< Map of Array's of Statistics that are started at a sim time */
    StatMap_t     m_StopTimeMap;          /*!< Map of Array's of Statistics that are stopped at a sim time */
    CompStatMap_t m_CompStatMap;          /*!< Map of Arrays of Statistics tied to Component Id's */
    bool          m_SimulationStarted;    /*!< Flag showing if Simulation has started */

    Output&                       m_output;
    uint8_t                       m_statLoadLevel;
    std::vector<StatisticOutput*> m_statOutputs;
    StatisticGroup                m_defaultGroup;
    std::vector<StatisticGroup>   m_statGroups;
    Core::ThreadSafe::Barrier     m_barrier;
};

} // namespace Statistics
} // namespace SST

#endif // SST_CORE_STATAPI_STATENGINE_H