--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/realtime/t_latncy.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,118 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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:
+// e32test\realtime\t_latncy.cpp
+// 
+//
+
+#include <e32test.h>
+#include <e32svr.h>
+
+LOCAL_D RTest test(_L("Latency"));
+LOCAL_D CConsoleBase* console=NULL;
+
+struct SLatencyValues
+	{
+	TUint iAddress;
+	TUint iLatencies;
+	TUint iThreadIds;
+	TUint iSwi;
+	};
+
+struct SMaxLatencyValues
+	{
+	TInt iMaxIntLatency;
+	TUint iMaxIntLatencyRetAddr;
+	TInt iMaxThreadLatency;
+	TUint iMaxThreadLatencyRetAddr;
+	};
+
+extern void GetLatencyValues(TInt, TInt&, SLatencyValues*);
+
+inline TInt* NullTIntPtr()	// to allow generation of a NULL reference without the compiler complaining
+	{ return 0; }
+
+void GetMaxLatencyValues(SMaxLatencyValues& a)
+	{
+	GetLatencyValues(2,*NullTIntPtr(),(SLatencyValues*)&a);
+	}
+
+LOCAL_C void DumpValues(TInt aCount, SLatencyValues* aValues)
+	{
+	TInt i;
+	for (i=0; i<aCount; i++)
+		{
+		SLatencyValues v=aValues[i];
+		TInt addr=v.iAddress;
+		TInt iticks=v.iLatencies>>16;
+		TInt tticks=v.iLatencies & 0xffff;
+		TInt ius=(iticks*125+124)>>6;
+		TInt tus=(tticks*125+124)>>6;
+//		TInt oldtid=v.iThreadIds & 0xffff;
+//		TInt newtid=v.iThreadIds >> 16;
+		TInt swi=v.iSwi;
+		RDebug::Print(_L("%08x %4d %4d %08x %08x"),addr,ius,tus,v.iThreadIds,swi);
+		}
+	}
+
+LOCAL_C void DisplayMaxLatencyValues()
+	{
+	SMaxLatencyValues v;
+	GetMaxLatencyValues(v);
+	TInt ius=(v.iMaxIntLatency*125+124)>>6;
+	TInt tus=(v.iMaxThreadLatency*125+124)>>6;
+	console->Printf(_L("Interrupt: %4dus return address %08x\n"),ius,v.iMaxIntLatencyRetAddr);
+	console->Printf(_L("Thread:    %4dus return address %08x\n"),tus,v.iMaxThreadLatencyRetAddr);
+	}
+
+GLDEF_C TInt E32Main()
+	{
+	TInt c;
+	SLatencyValues* pV=new SLatencyValues[28672];
+
+	test.Title();
+	console=test.Console();
+	if (!pV)
+		User::Panic(_L("OOM"),0);
+
+	TBool exit=EFalse;
+	while(!exit)
+		{
+		TKeyCode k=test.Getch();
+		switch(k)
+			{
+			case '0':
+				console->Printf(_L("Getting Latency Values\n"));
+				GetLatencyValues(0,c,pV);
+				DumpValues(c,pV);
+				break;
+			case '1':
+				console->Printf(_L("Clearing Latency Values\n"));
+				GetLatencyValues(1,c,pV);
+				break;
+			case '2':
+				DisplayMaxLatencyValues();
+				break;
+			case 'x':
+			case 'X':
+				exit=ETrue;
+				break;
+			default:
+				break;
+			}
+		}
+
+	test.End();
+	return 0;
+	}
+