diff -r 57c618273d5c -r bbf46f59e123 graphicstest/graphicstestharness/src/t_simloadutils.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicstest/graphicstestharness/src/t_simloadutils.cpp	Tue Aug 31 16:31:06 2010 +0300
@@ -0,0 +1,137 @@
+// Copyright (c) 2007-2009 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:
+//
+
+/**
+ @file
+ @test
+*/
+
+#include <e32math.h>
+#include <e32debug.h>
+#include <iniparser.h>
+#include "t_simload.h"
+#include "t_simloadutils.h"
+
+EXPORT_C TBool CTSimLoadAppUtils::IsStaticLoadL()
+	{
+	CIniData * iniData = CIniData::NewL(KSimLoadConfigFile);
+	CleanupStack::PushL(iniData);
+
+	TPtrC value;
+	User::LeaveIfError(iniData->FindVar(KDefaultSectionName, KConfigSimLoadType(), value));
+	HBufC* simLoadType = value.Alloc();
+
+	CleanupStack::PopAndDestroy(iniData);
+
+	TBool ret = EFalse;
+
+	if (simLoadType!=NULL && simLoadType->Des().Compare(_L("KSimLoadStatic")) == KErrNone)
+		{
+		ret = ETrue;
+		}
+	else
+		{
+		if (simLoadType!=NULL && simLoadType->Des().Compare(_L("KSimLoadSpiked")) != KErrNone)
+			{
+			User::Leave(KErrAbort);
+			}
+		}
+
+	return ret;
+	}
+
+EXPORT_C TInt CTSimLoadAppUtils::SimLoadL()
+	{
+	CIniData * iniData = CIniData::NewL(KSimLoadConfigFile);
+	CleanupStack::PushL(iniData);
+
+	TInt ret;
+	User::LeaveIfError(iniData->FindVar(KDefaultSectionName, KConfigSimLoadValue(), ret));
+	CleanupStack::PopAndDestroy(iniData);
+	return ret;
+	}
+
+EXPORT_C void CTSimLoadAppUtils::SimulateStaticLoadL(TInt aLoadPercentage, TInt aDelay)
+	{
+	if (aLoadPercentage>=0)
+		{
+		// assuming the figure read in was '%' calculate the loop count
+		// required to achieve the simulated load required
+		const TInt mySimLoad = CalculateSimLoadL(aLoadPercentage);
+
+		TInt internalDelay = aDelay;
+
+		if (aLoadPercentage==0)
+			{
+			// set delay to large number, so that simload process is still
+			// running at end of test, and therefore not cause issue with
+			// TEF execution determining the test has failed because
+			// the sim load app is not running at end of test.
+			internalDelay = 30000000; // 30s
+			}
+
+		SimulateTestLoad(mySimLoad, internalDelay);
+		}
+	}
+
+EXPORT_C void CTSimLoadAppUtils::SimulateSpikedLoad()
+	{
+	SimulateTestLoad(1500000, 100000);
+	}
+
+void CTSimLoadAppUtils::SimulateTestLoad(TInt aSimLoad, TInt aDelay)
+	{
+	FOREVER
+		{
+		for (TInt i = 0; i <= aSimLoad; i++)
+			{
+			//Load the CPU by forcing it to execute the NOP The load value
+			//is dependant upon the value of aSimLoad and the load type (either
+			//static or spiked) by the ratio of aSimload to aDelay
+			//Tuned to work with the H4 only
+			#if !defined(__WINS__) && !defined(__X86GCC__)
+			asm{nop;};
+			#endif
+			}
+
+		User::After(aDelay);
+		}
+	}
+
+TInt CTSimLoadAppUtils::CalculateSimLoadL(TInt aPercentage)
+	{
+	TInt32 calculatedLoad = 0;
+
+	if (aPercentage>0)
+		{
+		// based on measurements performed using Symbian Sample Profiler
+		// .../base/e32utils/analyse/profiler.rtf
+		// and then utilising curve fit (http://www.ebicom.net/~dhyams/cftp.htm)
+		// the following formula was determined to best calculate the load
+		// based on a required percentage
+		// simload = a + b*aPercentage + c*aPercentage^2 + d*aPercentage^3 + e*aPercentage^4
+		const TReal a = 92600;
+		const TReal b = -32000;
+		const TReal c = 4700;
+		const TReal d = -114;
+		const TReal e = 0.91;
+		TReal tempValue = a + (b*aPercentage) + (c*aPercentage*aPercentage)
+		                    + (d*aPercentage*aPercentage*aPercentage)
+		                    + (e*aPercentage*aPercentage*aPercentage*aPercentage);
+		User::LeaveIfError(Math::Int(calculatedLoad, tempValue));
+		}
+
+	return calculatedLoad;
+	}