--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/loadgen/src/loadgen_cpuload.cpp	Tue Feb 02 00:17:27 2010 +0200
@@ -0,0 +1,266 @@
+/*
+* 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 "loadgen_cpuload.h"
+#include "loadgen_model.h"
+#include "loadgen.hrh"
+#include <loadgen.rsg>
+#include <e32hal.h>
+#include <u32hal.h>
+#include <e32math.h>
+
+_LIT(KThreadName, "CPULoad %d");
+    
+// ===================================== MEMBER FUNCTIONS =====================================
+
+CCPULoad* CCPULoad::NewL(TCPULoadAttributes& aAttributes, TInt aReferenceNumber)
+    {
+    CCPULoad* self = new(ELeave) CCPULoad(aAttributes, aReferenceNumber);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;    
+    }
+
+// --------------------------------------------------------------------------------------------
+
+CCPULoad::~CCPULoad()
+    {
+    Close();
+    }
+
+// --------------------------------------------------------------------------------------------
+
+CCPULoad::CCPULoad(TCPULoadAttributes& aAttributes, TInt aReferenceNumber) : iAttributes(aAttributes)
+    {
+    iAttributes.iId = aReferenceNumber;
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::ConstructL()
+    {
+    CLoadBase::ConstructL();
+    
+    iType = ELoadGenCmdNewLoadCPULoad;
+    
+    TBuf<64> threadName;
+    threadName.Format(KThreadName, iAttributes.iId);
+    
+    // create a thread
+    User::LeaveIfError(iThread.Create(threadName, ThreadFunction, KDefaultStackSize*2, KMinHeapSize, 1024*KMinHeapSize, (TAny*) &iAttributes ));
+    
+    // set priority of the thread
+    SetPriority();
+    }
+
+// --------------------------------------------------------------------------------------------
+
+TInt CCPULoad::ThreadFunction(TAny* aThreadArg)
+    {
+    TCPULoadAttributes* threadArg = (TCPULoadAttributes*)aThreadArg;
+    TInt err = KErrNone;
+
+    // if a cpu is defined, tie this thread to the given cpu (SMP environment)
+    if (threadArg->iCpu >= 0 && threadArg->iCpu != KCPUSelection_AllCPUs )
+        {
+        UserSvr::HalFunction(EHalGroupKernel, KHalFunction_EKernelHalLockThreadToCpu, (TAny*) threadArg->iCpu, 0);
+        }
+    
+    CTrapCleanup* pC = CTrapCleanup::New();
+    CActiveScheduler* pS = new CActiveScheduler;
+    CActiveScheduler::Install(pS);
+
+    // start generating load, pass pointer to arguments
+    GenerateLoad(*((TCPULoadAttributes*) aThreadArg));
+
+    delete pS;
+    delete pC;
+    
+    return err;
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::GenerateLoad(TCPULoadAttributes& aAttributes)
+    {
+    for (;;)
+        {   
+        if (aAttributes.iType == ECpuLoadTypeContinuous)
+            {
+            // do constantly heave stuff
+            DoHeaveStuff(aAttributes.iMode);
+            }
+
+        else if (aAttributes.iType == ECpuLoadTypePeriodic)
+            {
+            // do periodically heave stuff
+            TTime startTime;
+            startTime.HomeTime(); // get start time
+
+            TTime currentTime;
+            TTimeIntervalMicroSeconds interval;
+            
+            TInt processPeriod = CLoadGenModel::MilliSecondsToMicroSeconds(aAttributes.iLength, aAttributes.iRandomVariance);
+
+            do
+                {
+                // do heave stuff
+                DoHeaveStuff(aAttributes.iMode);
+
+                currentTime.HomeTime();
+                interval = currentTime.MicroSecondsFrom(startTime);                
+                }
+            while (interval.Int64() < processPeriod);       
+
+
+            // now wait
+            User::After( CLoadGenModel::MilliSecondsToMicroSeconds(aAttributes.iIdle, aAttributes.iRandomVariance) );
+            }   
+
+        else
+            {
+            User::Panic(_L("Unk.type"), 888);
+            }
+        }
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::DoHeaveStuff(TInt aMode)
+    {
+    TTime now;
+    now.HomeTime();
+    TInt64 seed = now.Int64();
+    
+    TReal random = Math::FRand(seed);
+    
+    TReal target(10);
+    TReal source(10);
+    
+    target += random;
+    
+    Math::Cos(target, source);
+    
+    source = source / 1.0382873;
+    source -= 32.24343;
+    source += 132.24343;
+    source *= random;
+    
+    // yield trick
+    if (aMode == ECpuLoadModeYielding)
+        {
+        // sleep randomly
+        if (User::TickCount() % 50 == 0)
+            User::AfterHighRes(1);            
+        }
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::Resume()
+    {
+    CLoadBase::Resume();
+    
+    iThread.Resume();
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::Suspend()
+    {
+    CLoadBase::Suspend();
+    
+    iThread.Suspend();
+    }
+
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::SetPriority()
+    {
+    CLoadBase::SetPriority();
+    
+    iThread.SetPriority(CLoadGenModel::SettingItemToThreadPriority(iAttributes.iPriority));
+    }
+    
+// --------------------------------------------------------------------------------------------
+
+void CCPULoad::Close()
+    {
+    CLoadBase::Close();
+
+    // kill the thread immediately
+    iThread.Kill(0);   
+
+    iThread.Close();
+    }
+    
+// --------------------------------------------------------------------------------------------
+
+TPtrC CCPULoad::Description()
+    {
+    TBuf<256> buf;
+    TBuf<16> prioBuf;
+    CLoadGenModel::SettingItemToThreadDescription(iAttributes.iPriority, prioBuf);
+    
+    if (iAttributes.iType == ECpuLoadTypeContinuous)
+        {
+        if (iAttributes.iMode == ECpuLoadModeYielding)
+            {
+            _LIT(KCPULoadEntryContinuous, "[%d] CPULoad prio=%S mode=yielding type=cont");
+            buf.Format(KCPULoadEntryContinuous, iAttributes.iId, &prioBuf);
+            }
+        else if (iAttributes.iMode == ECpuLoadModeBlocking)
+            {
+            _LIT(KCPULoadEntryContinuous, "[%d] CPULoad prio=%S mode=blocking type=cont");
+            buf.Format(KCPULoadEntryContinuous, iAttributes.iId, &prioBuf);
+            }
+        }
+    
+    else if (iAttributes.iType == ECpuLoadTypePeriodic)
+        {
+        if (iAttributes.iMode == ECpuLoadModeYielding)
+            {
+            _LIT(KCPULoadEntryPeriodic, "[%d] CPULoad prio=%S mode=yielding type=period peak=%dms idle=%dms random=%d%%");
+            buf.Format(KCPULoadEntryPeriodic, iAttributes.iId, &prioBuf, iAttributes.iLength, iAttributes.iIdle, iAttributes.iRandomVariance);
+            }        
+        else if (iAttributes.iMode == ECpuLoadModeBlocking)
+            {
+            _LIT(KCPULoadEntryPeriodic, "[%d] CPULoad prio=%S mode=blocking type=period peak=%dms idle=%dms random=%d%%");
+            buf.Format(KCPULoadEntryPeriodic, iAttributes.iId, &prioBuf, iAttributes.iLength, iAttributes.iIdle, iAttributes.iRandomVariance);
+            }        
+        }
+    
+    // if we are running a load in a specific cpu, add the "name" of the
+    // cpu to the description. (SMP environment)
+    if (iAttributes.iCpu >= 0 && iAttributes.iCpu != KCPUSelection_AllCPUs)
+        {
+        TBuf<15> cpu;
+        _LIT(KCPU, " CPU%d");
+        cpu.Format(KCPU, iAttributes.iCpu);
+        buf.Append(cpu);
+        }
+    
+    return TPtrC(buf);
+    }               
+
+// --------------------------------------------------------------------------------------------
+
+
+// End of File