profiling.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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-------------------------------------------------------------------------------
    Copyright (C) 2009-2016 Bernhard Gschaider
    Copyright (C) 2016-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::profiling
 
Description
    Code profiling.
 
    This is typically activated from within the system/controlDict as follows
    (defaults shown):
    \code
        profiling
        {
            active      true;
            cpuInfo     false;
            memInfo     false;
            sysInfo     false;
        }
    \endcode
    or simply using all defaults:
    \code
        profiling
        {}
    \endcode
 
SourceFiles
    profiling.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef profiling_H
#define profiling_H
 
#include "profilingTrigger.H"
#include "IOdictionary.H"
#include "DynamicList.H"
#include "PtrDynList.H"
#include "Time.H"
#include "clockTime.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of classes
class Ostream;
class cpuInfo;
class memInfo;
class profilingSysInfo;
 
/*---------------------------------------------------------------------------*\
                          Class profiling Declaration
\*---------------------------------------------------------------------------*/
 
class profiling
:
    public IOdictionary
{
public:
 
    // Public Typedefs
 
        typedef profilingInformation Information;
        typedef profilingTrigger Trigger;
 
    // Static data members
 
        //- Flag if profiling is allowed
        static int allowed;
 
private:
 
    // Private classes, typedefs
 
        typedef profilingSysInfo sysInfo;
 
 
    // Private Static Data Members
 
        //- Only one global object is possible
        static profiling* singleton_;
 
 
    // Private Data Members
 
        //- The owner of the profiling
        const Time& owner_;
 
        //- Storage of profiling information
        PtrDynList<Information> pool_;
 
        //- Parent/child relationships for lookup purposes
        DynamicList<DynamicList<Information*,16>> children_;
 
        //- LIFO stack of profiling information
        DynamicList<Information*> stack_;
 
        //- LIFO stack of clock values
        DynamicList<clockValue> times_;
 
        //- General system information (optional)
        sysInfo* sysInfo_;
 
        //- CPU-Information (optional)
        cpuInfo* cpuInfo_;
 
        //- MEM-Information (optional)
        memInfo* memInfo_;
 
 
    // Private Member Functions
 
        //- No copy construct
        profiling(const profiling&) = delete;
 
        //- No copy assignment
        void operator=(const profiling&) = delete;
 
 
protected:
 
    // Friendship
 
        friend class profilingTrigger;
        friend class Time;
 
 
    // Constructors
 
        //- Construct IO object, everything enabled
        profiling(const IOobject& io, const Time& owner);
 
        //- Construct IO object with finer control over behaviour
        profiling
        (
            const dictionary& dict,
            const IOobject& io,
            const Time& owner
        );
 
 
    //- Destructor
    ~profiling();
 
 
    // Protected Member Functions
 
        //- Clear all profiling and restart with new profiling
        //  \return pointer to stored information element
        Information* create(const zero);
 
        //- Get or create named profiling information element with the
        //- specified parent.
        //  \return pointer to stored information element
        Information* create
        (
            Information* parent,
            const string& descr
        );
 
        //- Add to stack of active information and begin timer datum
        void beginTimer(Information* info);
 
        //- Remove from stack of active information and update elapsed time
        //  \return pointer to profiling information element (for reference)
        Information* endTimer();
 
 
    // Static control elements
 
        //- Singleton to initialize profiling pool, everything enabled
        static void initialize
        (
            const IOobject& ioObj,
            const Time& owner
        );
 
        //- Singleton to initialize profiling pool with finer control
        static void initialize
        (
            const dictionary& dict,
            const IOobject& ioObj,
            const Time& owner
        );
 
        //- Stop profiling, cleanup pool if possible
        static void stop(const Time& owner);
 
        //- Existing or new element on pool, add to stack.
        //  Returns nullptr if profiling has not been initialized
        static profilingInformation* New(const string& descr);
 
        //- Remove the information from the top of the stack
        static void unstack(const profilingInformation* info);
 
public:
 
    // Static Member Functions
 
        //- True if profiling is allowed and is active
        static bool active();
 
        //- Disallow profiling by forcing the InfoSwitch off.
        static void disable();
 
        //- Print profiling information to specified output
        //  Forwards to writeData member of top-level object
        static bool print(Ostream& os);
 
        //- Write profiling information now
        static bool writeNow();
 
 
    // Member Functions
 
        //- The owner of the profiling
        const Time& owner() const;
 
        //- The size of the current stack
        label size() const noexcept;
 
        //- writeData member function required by regIOobject
        virtual bool writeData(Ostream& os) const;
 
        //- Write as uncompressed ASCII
        virtual bool writeObject
        (
            IOstreamOption /*ignore*/,
            const bool valid
        ) const;
};
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //