perfmon/engine/src/perfmon_engine.cpp
branchRCL_3
changeset 22 fad26422216a
parent 21 b3cee849fa46
child 23 f8280f3bfeb7
--- a/perfmon/engine/src/perfmon_engine.cpp	Tue Aug 31 15:15:20 2010 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,925 +0,0 @@
-/*
- * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
- * All rights reserved.
- * This component and the accompanying materials are made available
- * under the terms of "Eclipse Public License v1.0"
- * which accompanies this distribution, and is available
- * at the URL "http://www.eclipse.org/legal/epl-v10.html".
- *
- * Initial Contributors:
- * Nokia Corporation - initial contribution.
- *
- * Contributors:
- *
- * Description:  
- *
- */
-// INCLUDE FILES
-#include "perfmon_engine.h"
-#include <coeutils.h>
-#include <bautils.h>
-#include <eikenv.h>
-#include <e32hal.h>
-#include <u32std.h>
-#include <s32file.h>
-#include <akntitle.h> 
-#include <eikspane.h>
-#include <aknnotewrappers.h>  
-_LIT(KDefaultLogFilePath, "c:\\data\\PerfMon.log");
-
-const TInt KCalibrationLength = 2;
-const TInt KMinimumSamplesLength = 16;
-const TInt KCPUTimeMultiplier = 1000000; // used to avoid TReal conversions
-
-const TInt KSettingsDrive = EDriveC;
-_LIT(KSettingsFileName, "perfmon_settings.ini");
-
-// --------------------------------------------------------------------------------------------
-
-TInt CPULoadCount(TAny* aInt)
-    {
-    // increase the counter
-    (*(TUint*) aInt)++;
-    return 1;
-    }
-
-TInt CPULoadNOPThread(TAny* aParam)
-    {
-    CTrapCleanup* pC = CTrapCleanup::New();
-    CActiveScheduler* pS = new CActiveScheduler;
-    CActiveScheduler::Install(pS);
-
-    CIdle* idle = CIdle::NewL(CActive::EPriorityLow);
-    TCallBack cb(CPULoadCount, aParam);
-    idle->Start(cb);
-
-    pS->Start();
-
-    delete idle;
-    delete pS;
-    delete pC;
-
-    return 0;
-    }
-
-// ===================================== MEMBER FUNCTIONS =====================================
-
-CPerfMonEngine::CPerfMonEngine() :
-    CActive(EPriorityUserInput)
-    {
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::ConstructL()
-    {
-    iCurrentCPUMode = ECPUModeNotSet;
-    iLogFileInitialized = EFalse;
-
-    iEnv = CEikonEnv::Static();
-    User::LeaveIfError(iLs.Connect());
-
-    User::LeaveIfError(iTimer.CreateLocal());
-    CActiveScheduler::Add(this);
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::ActivateEngineL()
-    {
-    // load settings
-    TRAP_IGNORE(LoadSettingsL());
-
-    // create data storages for the samples
-    CreateSamplesDataArrayL();
-
-    // set default modes
-    HandleSettingsChangeL();
-
-    // start sampling data immediately (jump to RunL)    
-    iTimer.After(iStatus, 100);
-    SetActive();
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::DeActivateEngineL()
-    {
-    Cancel();
-
-    DeActivateCPUMonitoring();
-
-    // close log file
-    OpenLogFile(EFalse);
-    }
-
-// --------------------------------------------------------------------------------------------
-
-CPerfMonEngine::~CPerfMonEngine()
-    {
-    iTimer.Close();
-
-    // clear data storages
-    if (iSampleEntryArray)
-        {
-        for (TInt i = 0; i < iSampleEntryArray->Count(); i++)
-            {
-            delete iSampleEntryArray->At(i).iSampleDataArray;
-            }
-
-        delete iSampleEntryArray;
-        }
-
-    iLs.Close();
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::DoCancel()
-    {
-    iTimer.Cancel();
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::RunL()
-    {
-    // calculate new values 
-    UpdateSamplesDataL();
-
-    // log changes
-    AppendLatestSamplesToLogsL();
-
-    // redraw views
-    SendDrawEventToContainersL();
-
-    // continue
-    iTimer.After(iStatus, iSettings.iHeartBeat * 1000); // convert from milliseconds to microseconds
-    SetActive();
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::HandleSettingsChangeL()
-    {
-    // set priority of the thread
-    RThread().SetPriority(SettingItemToThreadPriority(iSettings.iPriority));
-
-    // init cpu monitor if setting has been changed
-    if (iCurrentCPUMode != iSettings.iCPUMode)
-        {
-        DeActivateCPUMonitoring();
-        ActivateCPUMonitoringL();
-        }
-
-    // close log file
-    OpenLogFile(EFalse);
-
-    // enable log file
-    if (iSettings.iLoggingEnabled && (iSettings.iLoggingMode
-            == ELoggingModeLogFile || iSettings.iLoggingMode
-            == ELoggingModeRDebugLogFile))
-        OpenLogFile(ETrue);
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::EnableLogging(TBool aEnable)
-    {
-    if (aEnable)
-        {
-        if (iSettings.iLoggingMode == ELoggingModeLogFile
-                || iSettings.iLoggingMode == ELoggingModeRDebugLogFile)
-            OpenLogFile(ETrue);
-
-        iSettings.iLoggingEnabled = ETrue;
-        }
-    else // disable
-        {
-        iSettings.iLoggingEnabled = EFalse;
-        OpenLogFile(EFalse);
-        }
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::OpenLogFile(TBool aOpen)
-    {
-    // open log file for writing
-    if (aOpen)
-        {
-        if (!iLogFileInitialized)
-            {
-            TInt err(KErrNone);
-
-            // open the log file for writing
-            if (iLogFile.Open(iEnv->FsSession(), iSettings.iLoggingFilePath,
-                    EFileWrite) != KErrNone)
-                {
-                iEnv->FsSession().MkDirAll(iSettings.iLoggingFilePath);
-                err = iLogFile.Replace(iEnv->FsSession(),
-                        iSettings.iLoggingFilePath, EFileWrite);
-                }
-            else
-                {
-                // file opens correctly, seek to the end
-                TInt fileSize = 0;
-                iLogFile.Size(fileSize);
-                err = iLogFile.Seek(ESeekCurrent, fileSize);
-                }
-
-            if (err == KErrNone)
-                {
-                iLogFileInitialized = ETrue;
-                }
-            else
-                {
-                // show error
-                CAknErrorNote* note = new (ELeave) CAknErrorNote();
-                note->ExecuteLD(_L("Unable to create log file, check settings"));
-                }
-            }
-        }
-
-    // close handle to log file
-    else
-        {
-        if (iLogFileInitialized)
-            {
-            iLogFile.Flush();
-            iLogFile.Close();
-
-            iLogFileInitialized = EFalse;
-            }
-        }
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::ActivateCPUMonitoringL()
-    {
-    // reset counter variables
-    iCPULoadCalibrating = ETrue;
-    iCPULoadCalibrationCounter = 0;
-    iCPULoadMaxValue = 999999999;
-    iCPULoadPreviousValue = 1;
-    iCPULoadCounter = 0;
-
-    // use null thread is cpu time is supported and the setting is on
-    if (CPUTimeSupported() && iSettings.iCPUMode == ECPUModeCPUTime)
-        {
-        // try to open handle to null thread
-        if (OpenHandleToNullThread())
-            {
-            // handle is open, get initial value
-            TTimeIntervalMicroSeconds time;
-            iNullThread.GetCpuTime(time);
-            iCPULoadPreviousValue = time.Int64();
-            iPreviousTime.HomeTime();
-
-            iCurrentCPUMode = ECPUModeCPUTime;
-            return; // cpu time is succesfully in use           
-            }
-        }
-
-    // otherwise use normal sampling with nops    
-    iCurrentCPUMode = ECPUModeNotSet;
-
-    // show a warning if cpu time cannot be taken in use
-    if (iSettings.iCPUMode == ECPUModeCPUTime)
-        {
-        CAknInformationNote* note = new (ELeave) CAknInformationNote();
-        note->ExecuteLD(
-                _L("CPU Time not supported in this system, using NOPs sampling"));
-        }
-
-    // create a thread for CPU load monitoring
-    User::LeaveIfError(iCPULoadThread.Create(_L("PerfMonCPULoad"),
-            CPULoadNOPThread, 0x1000, 0x1000, 0x100000, &iCPULoadCounter));
-    iCPULoadThread.SetPriority(EPriorityAbsoluteVeryLow);
-    iCPULoadThread.Resume();
-
-    iCurrentCPUMode = ECPUModeNOPs; // NOPs taken succesfully in use
-    }
-
-// --------------------------------------------------------------------------------------------
-
-TBool CPerfMonEngine::OpenHandleToNullThread()
-    {
-    // find the kernel process and then the null thread
-    TFindProcess fp(_L("ekern.exe*"));
-
-    TFullName kernelName;
-    if (fp.Next(kernelName) == KErrNone)
-        {
-        // process found, append null thread identifier
-        kernelName.Append(_L("::Null"));
-
-        // find the thread
-        TFindThread ft(kernelName);
-
-        TFullName threadName;
-        if (ft.Next(threadName) == KErrNone)
-            {
-            // open instance to the thread
-            if (iNullThread.Open(threadName) != KErrNone)
-                return EFalse;
-            }
-        }
-
-    // process not found
-    else
-        return EFalse;
-
-    // success!
-    return ETrue;
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::DeActivateCPUMonitoring()
-    {
-    if (iCurrentCPUMode == ECPUModeCPUTime)
-        {
-        iNullThread.Close();
-        }
-
-    else if (iCurrentCPUMode == ECPUModeNOPs)
-        {
-        // kill the cpu load thread
-        iCPULoadThread.Kill(0);
-        iCPULoadThread.Close();
-        }
-    }
-
-// --------------------------------------------------------------------------------------------
-
-TBool CPerfMonEngine::CPUTimeSupported()
-    {
-    TTimeIntervalMicroSeconds time;
-    TInt err = RThread().GetCpuTime(time);
-
-    if (err == KErrNone && time.Int64() > 0)
-        return ETrue;
-    else
-        return EFalse;
-    }
-
-// --------------------------------------------------------------------------------------------
-
-TThreadPriority CPerfMonEngine::SettingItemToThreadPriority(TInt aIndex)
-    {
-    TThreadPriority threadPriority = EPriorityNull;
-
-    switch (aIndex)
-        {
-        case EThreadPriorityTypeMuchLess:
-            {
-            threadPriority = EPriorityMuchLess;
-            break;
-            }
-        case EThreadPriorityTypeLess:
-            {
-            threadPriority = EPriorityLess;
-            break;
-            }
-        case EThreadPriorityTypeNormal:
-            {
-            threadPriority = EPriorityNormal;
-            break;
-            }
-        case EThreadPriorityTypeMore:
-            {
-            threadPriority = EPriorityMore;
-            break;
-            }
-        case EThreadPriorityTypeMuchMore:
-            {
-            threadPriority = EPriorityMuchMore;
-            break;
-            }
-        case EThreadPriorityTypeRealTime:
-            {
-            threadPriority = EPriorityRealTime;
-            break;
-            }
-        case EThreadPriorityTypeAbsoluteVeryLow:
-            {
-            threadPriority = EPriorityAbsoluteVeryLow;
-            break;
-            }
-        case EThreadPriorityTypeAbsoluteLow:
-            {
-            threadPriority = EPriorityAbsoluteLow;
-            break;
-            }
-        case EThreadPriorityTypeAbsoluteBackground:
-            {
-            threadPriority = EPriorityAbsoluteBackground;
-            break;
-            }
-        case EThreadPriorityTypeAbsoluteForeground:
-            {
-            threadPriority = EPriorityAbsoluteForeground;
-            break;
-            }
-        case EThreadPriorityTypeAbsoluteHigh:
-            {
-            threadPriority = EPriorityAbsoluteHigh;
-            break;
-            }
-
-        default:
-            {
-            User::Panic(_L("Wrong tp index"), 276);
-            break;
-            }
-        }
-
-    return threadPriority;
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::CreateSamplesDataArrayL()
-    {
-    TInt
-            maxSamples =
-                    iSettings.iMaxSamples >= KMinimumSamplesLength ? iSettings.iMaxSamples
-                            : KMinimumSamplesLength;
-
-    // create the data structure to store all samples
-    iSampleEntryArray = new (ELeave) CSampleEntryArray(16);
-
-    // add all source entries
-    for (TInt i = 0; i < ESourcesLength; i++)
-        {
-        TSampleEntry newSampleEntry;
-
-        if (i == ESourceCPU)
-            {
-            newSampleEntry.iDescription.Copy(_L("CPU"));
-            newSampleEntry.iUnitTypeShort.Copy(KNullDesC);
-            newSampleEntry.iUnitTypeLong.Copy(KNullDesC);
-            newSampleEntry.iDriveNumber = -1;
-            newSampleEntry.iGraphColor = KRgbYellow;
-            }
-
-        else if (i == ESourceRAM)
-            {
-            newSampleEntry.iDescription.Copy(_L("RAM"));
-            newSampleEntry.iUnitTypeShort.Copy(_L("b"));
-            newSampleEntry.iUnitTypeLong.Copy(_L("bytes"));
-            newSampleEntry.iDriveNumber = -1;
-            newSampleEntry.iGraphColor = KRgbGreen;
-            }
-
-        else //drives
-            {
-            TChar driveLetter = 'C' + i - ESourceC; // C is the first drive
-
-            newSampleEntry.iDescription.Append(driveLetter);
-            newSampleEntry.iDescription.Append(_L(":"));
-            newSampleEntry.iUnitTypeShort.Copy(_L("b"));
-            newSampleEntry.iUnitTypeLong.Copy(_L("bytes"));
-
-            iEnv->FsSession().CharToDrive(driveLetter,
-                    newSampleEntry.iDriveNumber);
-
-            newSampleEntry.iGraphColor = KRgbCyan;
-            newSampleEntry.iGraphColor.SetGreen(255 - (i - ESourceC) * 30);
-            newSampleEntry.iGraphColor.SetRed(i * 30);
-            }
-
-        newSampleEntry.iSampleDataArray = new (ELeave) CSampleDataArray(
-                maxSamples);
-
-        iSampleEntryArray->AppendL(newSampleEntry);
-        }
-
-    // save current time as start time
-    iStartTime.HomeTime();
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::UpdateSamplesDataL()
-    {
-    // reset inactivity timers
-    if (iSettings.iKeepBacklightOn)
-        User::ResetInactivityTime();
-
-    // get current time
-    TTime currentTime;
-    currentTime.HomeTime();
-
-    // calculate time difference
-    TTimeIntervalMicroSeconds timeDeltaFromPreviousSample =
-            currentTime.MicroSecondsFrom(iPreviousTime);
-
-    // remember current time as previous
-    iPreviousTime = currentTime;
-
-    // get CPU
-    TInt64 cpuLoadDelta(0);
-    TInt64 cpuLoadFree(0);
-    TInt64 cpuLoadSize(0);
-    TInt64 currentCPUValue(0);
-
-    if (iCurrentCPUMode == ECPUModeCPUTime || iCurrentCPUMode == ECPUModeNOPs)
-        {
-        if (iCurrentCPUMode == ECPUModeCPUTime)
-            {
-            TTimeIntervalMicroSeconds time;
-            iNullThread.GetCpuTime(time);
-            currentCPUValue = time.Int64();
-            }
-        else if (iCurrentCPUMode == ECPUModeNOPs)
-            {
-            currentCPUValue = iCPULoadCounter;
-            }
-
-        // get delta and store the previous value
-        cpuLoadDelta = currentCPUValue - iCPULoadPreviousValue;
-        iCPULoadPreviousValue = currentCPUValue;
-
-        // velocity = distance / time
-        cpuLoadFree = cpuLoadDelta * KCPUTimeMultiplier
-                / timeDeltaFromPreviousSample.Int64();
-
-        // detect maximum value
-        if (cpuLoadFree > iCPULoadMaxValue)
-            iCPULoadMaxValue = cpuLoadFree;
-
-        // check calibration status      
-        if (iCPULoadCalibrating)
-            {
-            iCPULoadCalibrationCounter++;
-            cpuLoadSize = cpuLoadFree;
-
-            // check if need to calibrate anymore
-            if (iCPULoadCalibrationCounter > KCalibrationLength)
-                {
-                iCPULoadCalibrating = EFalse;
-
-                // from the samples, get the minimum value, and let it be the max value 
-                for (TInt i = 0; i
-                        < iSampleEntryArray->At(0).iSampleDataArray->Count(); i++)
-                    {
-                    TInt64 newCPULoadMaxValue = iCPULoadMaxValue;
-
-                    if (iSampleEntryArray->At(0).iSampleDataArray->At(i).iFree
-                            < newCPULoadMaxValue)
-                        {
-                        newCPULoadMaxValue
-                                = iSampleEntryArray->At(0).iSampleDataArray->At(
-                                        i).iFree;
-                        }
-
-                    iCPULoadMaxValue = newCPULoadMaxValue;
-                    }
-
-                // adjust priority of the poller thread
-                if (iCurrentCPUMode == ECPUModeNOPs)
-                    {
-                    iCPULoadThread.SetPriority(EPriorityAbsoluteVeryLow);
-                    }
-                }
-
-            }
-        else
-            {
-            cpuLoadSize = iCPULoadMaxValue;
-            }
-        }
-
-    // save cpu sample data    
-    TSampleData cpuSample;
-    cpuSample.iFree = cpuLoadFree;
-    cpuSample.iSize = cpuLoadSize;
-    cpuSample.iTimeFromStart = currentTime.MicroSecondsFrom(iStartTime);
-
-    iSampleEntryArray->At(0).iSampleDataArray->InsertL(0, cpuSample);
-
-    // get ram memory
-    TMemoryInfoV1Buf ramMemory;
-    UserHal::MemoryInfo(ramMemory);
-
-    TSampleData memorySample;
-    memorySample.iFree = ramMemory().iFreeRamInBytes;
-    memorySample.iSize = ramMemory().iMaxFreeRamInBytes;
-    memorySample.iTimeFromStart = currentTime.MicroSecondsFrom(iStartTime);
-
-    iSampleEntryArray->At(1).iSampleDataArray->InsertL(0, memorySample);
-
-    // all drives
-    for (TInt i = 2; i < iSampleEntryArray->Count(); i++)
-        {
-        TSampleData driveSample;
-
-        // get volume info from RFs
-        TVolumeInfo volumeInfo;
-        if (iEnv->FsSession().Volume(volumeInfo,
-                iSampleEntryArray->At(i).iDriveNumber) == KErrNone)
-            {
-            driveSample.iFree = volumeInfo.iFree;
-            driveSample.iSize = volumeInfo.iSize;
-            }
-        else
-            {
-            driveSample.iFree = 0;
-            driveSample.iSize = 0;
-            }
-
-        driveSample.iTimeFromStart = currentTime.MicroSecondsFrom(iStartTime);
-
-        iSampleEntryArray->At(i).iSampleDataArray->InsertL(0, driveSample);
-        }
-
-    // compress sample data arrays to save memory
-    TInt curLength(iSampleEntryArray->At(0).iSampleDataArray->Count());
-
-    TInt
-            maxSamples =
-                    iSettings.iMaxSamples >= KMinimumSamplesLength ? iSettings.iMaxSamples
-                            : KMinimumSamplesLength;
-
-    if (curLength > maxSamples && curLength % 5 == 0)
-        {
-        for (TInt i = 0; i < iSampleEntryArray->Count(); i++)
-            {
-            iSampleEntryArray->At(i).iSampleDataArray->ResizeL(maxSamples); // looses old samples
-            iSampleEntryArray->At(i).iSampleDataArray->Compress();
-            }
-        }
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::AppendLatestSamplesToLogsL()
-    {
-    if (iSettings.iLoggingEnabled && SampleEntryArray())
-        {
-        // loop all sources
-        for (TInt i = 0; i < SampleEntryArray()->Count(); i++)
-            {
-            // check if this setting has been enabled and it has some data
-            if (iSettings.iLoggingSources.iSrcEnabled[i]
-                    && SampleEntryArray()->At(i).iSampleDataArray->Count() > 0)
-                {
-                // get current sample
-                TSampleData& currentSample =
-                        SampleEntryArray()->At(i).iSampleDataArray->At(0);
-
-                TBuf<128> buf;
-                buf.Append(_L("PERFMON;"));
-                buf.Append(SampleEntryArray()->At(i).iDescription);
-                buf.Append(_L(";"));
-                buf.AppendNum(currentSample.iTimeFromStart.Int64());
-                buf.Append(_L(";"));
-                buf.AppendNum(currentSample.iFree);
-                buf.Append(_L(";"));
-                buf.AppendNum(currentSample.iSize);
-
-                // print to RDebug
-                if (iSettings.iLoggingMode == ELoggingModeRDebug
-                        || iSettings.iLoggingMode == ELoggingModeRDebugLogFile)
-                    {
-                    RDebug::Print(buf);
-                    }
-
-                // print to log file
-                if (iSettings.iLoggingMode == ELoggingModeLogFile
-                        || iSettings.iLoggingMode == ELoggingModeRDebugLogFile)
-                    {
-                    buf.Append(_L("\r\n"));
-
-                    TBuf8<128> buf8;
-                    buf8.Copy(buf);
-
-                    iLogFile.Write(buf8);
-                    }
-                }
-            }
-        }
-    }
-
-void CPerfMonEngine::LoadSettingsL()
-    {
-    // set defaults
-    iSettings.iHeartBeat = 600;
-    iSettings.iMaxSamples = 64;
-    iSettings.iPriority = EThreadPriorityTypeNormal;
-    iSettings.iCPUMode = ECPUModeCPUTime;
-    iSettings.iKeepBacklightOn = ETrue;
-
-    iSettings.iDataPopupVisibility = EDataPopupVisbilityAlwaysOn;
-    // TODO: remove the next line once data popup is working
-    iSettings.iDataPopupVisibility = EDataPopupVisbilityAlwaysAlwaysOff;
-    iSettings.iDataPopupLocation = EDataPopupLocationTopRight;
-    iSettings.iDataPopupSources.SetDefaults1();
-
-    iSettings.iGraphsVerticalBarPeriod = 5;
-    iSettings.iGraphsSources.SetDefaults2();
-
-    iSettings.iLoggingMode = ELoggingModeRDebug;
-    iSettings.iLoggingFilePath.Copy(KDefaultLogFilePath);
-    iSettings.iLoggingSources.SetDefaults2();
-
-    iSettings.iLoggingEnabled = EFalse;
-
-    // make sure that the private path of this app in c-drive exists
-    iEnv->FsSession().CreatePrivatePath(KSettingsDrive); // c:\\private\\20011385\\
-    
-    // handle settings always in the private directory 
-    if (iEnv->FsSession().SetSessionToPrivate(KSettingsDrive) == KErrNone)
-        {
-        const TUid KUidPerfMon =
-            {
-            0x20011385
-            };
-        // open or create a dictionary file store
-        CDictionaryFileStore* settingsStore = CDictionaryFileStore::OpenLC(
-                iEnv->FsSession(), KSettingsFileName, KUidPerfMon);
-
-        LoadDFSValueL(settingsStore, KPMSettingHeartBeat, iSettings.iHeartBeat);
-        LoadDFSValueL(settingsStore, KPMSettingMaxSamples,
-                iSettings.iMaxSamples);
-        LoadDFSValueL(settingsStore, KPMSettingPriority, iSettings.iPriority);
-        
-        LoadDFSValueL(settingsStore, KPMSettingCPUMode, iSettings.iCPUMode);
-        
-        LoadDFSValueL(settingsStore, KPMSettingKeepBackLightOn,
-                iSettings.iKeepBacklightOn);
-
-        LoadDFSValueL(settingsStore, KPMSettingDataPopupVisbility,
-                iSettings.iDataPopupVisibility);
-        LoadDFSValueL(settingsStore, KPMSettingDataPopupLocation,
-                iSettings.iDataPopupLocation);
-        LoadDFSValueL(settingsStore, KPMSettingDataPopupSources,
-                iSettings.iDataPopupSources);
-
-        LoadDFSValueL(settingsStore, KPMSettingGraphsVerticalBarPeriod,
-                iSettings.iGraphsVerticalBarPeriod);
-        LoadDFSValueL(settingsStore, KPMSettingGraphsSources,
-                iSettings.iGraphsSources);
-
-        LoadDFSValueL(settingsStore, KPMSettingLoggingMode,
-                iSettings.iLoggingMode);
-        LoadDFSValueL(settingsStore, KPMSettingLoggingFilePath,
-                iSettings.iLoggingFilePath);
-        LoadDFSValueL(settingsStore, KPMSettingLoggingSources,
-                iSettings.iLoggingSources);
-
-        CleanupStack::PopAndDestroy(); // settingsStore         
-        }
-    }
-
-// --------------------------------------------------------------------------------------------
-
-void CPerfMonEngine::SaveSettingsL()
-    {
-    // handle settings always in c:\\private\\20011385\\
-    if (iEnv->FsSession().SetSessionToPrivate( KSettingsDrive ) == KErrNone)
-        {
-        // delete existing store to make sure that it is clean and not eg corrupted
-        if (BaflUtils::FileExists(iEnv->FsSession(), KSettingsFileName))
-            {
-            iEnv->FsSession().Delete(KSettingsFileName);
-            }
-
-        const TUid KUidPerfMon =
-            {
-            0x20011385
-            };
-        // create a dictionary file store
-        CDictionaryFileStore* settingsStore = CDictionaryFileStore::OpenLC(
-                iEnv->FsSession(), KSettingsFileName, KUidPerfMon);
-
-        SaveDFSValueL(settingsStore, KPMSettingHeartBeat, iSettings.iHeartBeat);
-        SaveDFSValueL(settingsStore, KPMSettingMaxSamples,
-                iSettings.iMaxSamples);
-        SaveDFSValueL(settingsStore, KPMSettingPriority, iSettings.iPriority);
-        SaveDFSValueL(settingsStore, KPMSettingCPUMode, iSettings.iCPUMode);
-        SaveDFSValueL(settingsStore, KPMSettingKeepBackLightOn,
-                iSettings.iKeepBacklightOn);
-
-        SaveDFSValueL(settingsStore, KPMSettingDataPopupVisbility,
-                iSettings.iDataPopupVisibility);
-        SaveDFSValueL(settingsStore, KPMSettingDataPopupLocation,
-                iSettings.iDataPopupLocation);
-        SaveDFSValueL(settingsStore, KPMSettingDataPopupSources,
-                iSettings.iDataPopupSources);
-
-        SaveDFSValueL(settingsStore, KPMSettingGraphsVerticalBarPeriod,
-                iSettings.iGraphsVerticalBarPeriod);
-        SaveDFSValueL(settingsStore, KPMSettingGraphsSources,
-                iSettings.iGraphsSources);
-
-        SaveDFSValueL(settingsStore, KPMSettingLoggingMode,
-                iSettings.iLoggingMode);
-        SaveDFSValueL(settingsStore, KPMSettingLoggingFilePath,
-                iSettings.iLoggingFilePath);
-        SaveDFSValueL(settingsStore, KPMSettingLoggingSources,
-                iSettings.iLoggingSources);
-
-        settingsStore->CommitL();
-        CleanupStack::PopAndDestroy(); // settingsStore             
-        }
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::LoadDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, TInt& aValue)
-    {
-    if (aDicFS->IsPresentL(aUid))
-        {
-        RDictionaryReadStream in;
-        in.OpenLC(*aDicFS, aUid);
-        aValue = in.ReadInt16L();
-        CleanupStack::PopAndDestroy(); // in        
-        }
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::LoadDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, TDes& aValue)
-    {
-    if (aDicFS->IsPresentL(aUid))
-        {
-        RDictionaryReadStream in;
-        in.OpenLC(*aDicFS, aUid);
-        TInt bufLength = in.ReadInt16L(); // get length of descriptor
-        in.ReadL(aValue, bufLength); // get the descriptor itself
-        CleanupStack::PopAndDestroy(); // in
-        }
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::LoadDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, TPerfMonSources& aValue)
-    {
-    if (aDicFS->IsPresentL(aUid))
-        {
-        RDictionaryReadStream in;
-        in.OpenLC(*aDicFS, aUid);
-        TInt bufLength = in.ReadInt16L(); // get length of the array
-
-        if (bufLength < 0 || bufLength > ESourcesLength) // check for validaty
-            User::Leave(KErrNotSupported);
-
-        for (TInt i = 0; i < bufLength; i++) // get all items
-            aValue.iSrcEnabled[i] = in.ReadInt16L();
-
-        CleanupStack::PopAndDestroy(); // in
-        }
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::SaveDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, const TInt& aValue)
-    {
-    RDictionaryWriteStream out;
-    out.AssignLC(*aDicFS, aUid);
-    out.WriteInt16L(aValue);
-    out.CommitL();
-    CleanupStack::PopAndDestroy(); // out
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::SaveDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, const TDes& aValue)
-    {
-    RDictionaryWriteStream out;
-    out.AssignLC(*aDicFS, aUid);
-    out.WriteInt16L(aValue.Length()); // write length of the descriptor
-    out.WriteL(aValue, aValue.Length()); // write the descriptor itself
-    out.CommitL();
-    CleanupStack::PopAndDestroy(); // out
-    }
-
-// ---------------------------------------------------------------------------
-
-void CPerfMonEngine::SaveDFSValueL(CDictionaryFileStore* aDicFS,
-        const TUid& aUid, const TPerfMonSources& aValue)
-    {
-    RDictionaryWriteStream out;
-    out.AssignLC(*aDicFS, aUid);
-
-    out.WriteInt16L(ESourcesLength); // write length of the array
-
-    for (TInt i = 0; i < ESourcesLength; i++) // write all items
-        out.WriteInt16L(aValue.iSrcEnabled[i]);
-
-    out.CommitL();
-    CleanupStack::PopAndDestroy(); // out
-    }
-
-// ---------------------------------------------------------------------------
-
-// End of File