mulwidgets/common/inc/mulperformance.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:56:02 +0200
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Perf log header.
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*
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*/
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#ifndef CMULPERF_H
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#define CMULPERF_H
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//  INCLUDES
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#include <e32debug.h>
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#include <e32base.h>
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#include <e32std.h>
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#include <hal.h>
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#include <e32cmn.h>
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#include <flogger.h>
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#include <f32file.h>
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_LIT(KLogFileName,"mulperf.log");
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_LIT(KLogFileDir,"mullogs");
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_LIT(KLogFileRootDir,"c:\\logs\\");
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/**
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 *  @class CMulPerf
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 *
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 *  Provides API to measure performance (memory and time). Results are saved to a file.
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 *
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 *  @lib duiengine.lib
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 *  @since Series 60 5.0
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 */
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class CMulPerf : public CBase
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    {
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public:
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    /**
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     * Struct which holds data before measuring is started.
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     */
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    struct TPerfData
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        {
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        /**
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         * Time when measure starts
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         */
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        TTime iStartTime;
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        /**
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         * Memory when measure starts
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         */
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        TInt iStartMemory;
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        };
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public:  // Constructors and destructor
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    /**
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     * Constructor.
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     */
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    static CMulPerf* NewL();
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    /**
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     * Destructor.
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     */
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    virtual ~CMulPerf();
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public: // New functions
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    /**
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     * Prints current amount of memory to file.
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     *
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     * @param aMsg User defined message which is printed before amount of memory
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     */
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    inline static void PrintUserMem(const TDesC& aMsg);
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    /**
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     * Saves current amount of memory and time and returns those to user.
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     *
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     * @param aMsg User defined message.
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     * @return TPerfData which holds current memory consumption and time.
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     */
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    inline static TPerfData* StartTestCase(const TDesC& aMsg = KNullDesC);
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    /**
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     * Reads current amount of memory and time and calculates performance using
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     * values got from StartTestCase.
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     *
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     * @param aData Data which has got when calling StartTestCase.
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     * @param aMsg User defined message.
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     */
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    inline static void StopTestCase(TPerfData* aData, const TDesC& aMsg = KNullDesC);
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    /**
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     * Create file where results are written to.
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     */
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    inline static void CreateLogFile();
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private:
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    /**
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     * Internal constructor.
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     */
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    CMulPerf();
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    /**
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     * Internal constructor.
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     */
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    void ConstructL();
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    };
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inline void CMulPerf::PrintUserMem(const TDesC& aMsg)
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    {
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    TBuf<512> buffer;
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    TInt freeRAM;
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    HAL::Get(HALData::EMemoryRAMFree, freeRAM);
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    RHeap heap = User::Heap();
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    heap.Open();
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    TInt _size = heap.Size();
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    TInt largest = 0;
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    TInt available = heap.Available(largest);
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    heap.Close();
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    _LIT( KMemoryFormat, "FreeRAM: %d kB, User: - heap %d kB, available %d kB, largest block %d kB" );
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    buffer.Format(KMemoryFormat, freeRAM / 1024, _size / 1024, available / 1024, largest / 1024);
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    CreateLogFile();
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    //Write logs into file
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    RFileLogger::WriteFormat( KLogFileDir,KLogFileName,EFileLoggingModeAppend,_L("RAM - %S - %S"), &aMsg, &buffer);
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    }
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inline CMulPerf::TPerfData* CMulPerf::StartTestCase(const TDesC& aMsg)
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    {
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    CreateLogFile();
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    //Write logs into file
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    RFileLogger::WriteFormat(KLogFileDir,KLogFileName,EFileLoggingModeAppend,_L("Test case %S starts"), &aMsg);
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    CMulPerf::TPerfData* data = new (ELeave) TPerfData;
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    TTime readyTime;
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    data->iStartTime.HomeTime();
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    User::AllocSize(data->iStartMemory);
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    return data;
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    }
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inline void CMulPerf::StopTestCase(CMulPerf::TPerfData* aData, const TDesC& aMsg)
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    {
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    if (!aData)
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        {
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        return;
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        }
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    TTime readyTime;
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    readyTime.HomeTime();
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    TTimeIntervalMicroSeconds delay = readyTime.MicroSecondsFrom(aData->iStartTime);
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    TTime transferTime(delay.Int64());
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    TBuf<64> timeString;
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    transferTime.FormatL(timeString, _L("- Elapsed time: %S%C microseconds"));
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    TBuf<256> tmp;
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    tmp.Append(timeString);
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    RFileLogger::Write(KLogFileDir,KLogFileName,EFileLoggingModeAppend,tmp);
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    // Memory consumption
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    TInt endMemory;
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    User::AllocSize(endMemory);
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    CreateLogFile();
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    //Write logs into file
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    RFileLogger::WriteFormat(KLogFileDir,KLogFileName,EFileLoggingModeAppend,_L("- Allocated memory: %d kB"), (endMemory - aData->iStartMemory) / 1024);
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    delete aData;
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    aData = NULL;
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    RFileLogger::WriteFormat(KLogFileDir,KLogFileName,EFileLoggingModeAppend,_L("Test case %S ends"), &aMsg);
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    }
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inline void CMulPerf::CreateLogFile()
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    {
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    RFs fsSession;
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    RFile file;
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    User::LeaveIfError(fsSession.Connect());
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    TFileName filename;
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    filename.Append(KLogFileRootDir);
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    filename.Append(KLogFileDir);
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    filename.Append(_L("\\"));
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    //create logs directory if it doesn't exist
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    fsSession.MkDir(filename);
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    filename.Append(KLogFileName);
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    //check if log file already exists
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    TInt retStatus = file.Open(fsSession,filename,EFileRead);
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    if (retStatus == KErrNotFound)
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        file.Create(fsSession,filename,EFileWrite);         //create a new log file
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    file.Close();
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    fsSession.Close();
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    }
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#endif // CMULPERF_H
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// End of File