1 // Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of the License "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // e32test\realtime\t_latncy.cpp

    15 // 

    16 //

    17 

    18 #include <e32test.h>

    19 #include <e32svr.h>

    20 

    21 LOCAL_D RTest test(_L("Latency"));

    22 LOCAL_D CConsoleBase* console=NULL;

    23 

    24 struct SLatencyValues

    25 	{

    26 	TUint iAddress;

    27 	TUint iLatencies;

    28 	TUint iThreadIds;

    29 	TUint iSwi;

    30 	};

    31 

    32 struct SMaxLatencyValues

    33 	{

    34 	TInt iMaxIntLatency;

    35 	TUint iMaxIntLatencyRetAddr;

    36 	TInt iMaxThreadLatency;

    37 	TUint iMaxThreadLatencyRetAddr;

    38 	};

    39 

    40 extern void GetLatencyValues(TInt, TInt&, SLatencyValues*);

    41 

    42 inline TInt* NullTIntPtr()	// to allow generation of a NULL reference without the compiler complaining

    43 	{ return 0; }

    44 

    45 void GetMaxLatencyValues(SMaxLatencyValues& a)

    46 	{

    47 	GetLatencyValues(2,*NullTIntPtr(),(SLatencyValues*)&a);

    48 	}

    49 

    50 LOCAL_C void DumpValues(TInt aCount, SLatencyValues* aValues)

    51 	{

    52 	TInt i;

    53 	for (i=0; i<aCount; i++)

    54 		{

    55 		SLatencyValues v=aValues[i];

    56 		TInt addr=v.iAddress;

    57 		TInt iticks=v.iLatencies>>16;

    58 		TInt tticks=v.iLatencies & 0xffff;

    59 		TInt ius=(iticks*125+124)>>6;

    60 		TInt tus=(tticks*125+124)>>6;

    61 //		TInt oldtid=v.iThreadIds & 0xffff;

    62 //		TInt newtid=v.iThreadIds >> 16;

    63 		TInt swi=v.iSwi;

    64 		RDebug::Print(_L("%08x %4d %4d %08x %08x"),addr,ius,tus,v.iThreadIds,swi);

    65 		}

    66 	}

    67 

    68 LOCAL_C void DisplayMaxLatencyValues()

    69 	{

    70 	SMaxLatencyValues v;

    71 	GetMaxLatencyValues(v);

    72 	TInt ius=(v.iMaxIntLatency*125+124)>>6;

    73 	TInt tus=(v.iMaxThreadLatency*125+124)>>6;

    74 	console->Printf(_L("Interrupt: %4dus return address %08x\n"),ius,v.iMaxIntLatencyRetAddr);

    75 	console->Printf(_L("Thread:    %4dus return address %08x\n"),tus,v.iMaxThreadLatencyRetAddr);

    76 	}

    77 

    78 GLDEF_C TInt E32Main()

    79 	{

    80 	TInt c;

    81 	SLatencyValues* pV=new SLatencyValues[28672];

    82 

    83 	test.Title();

    84 	console=test.Console();

    85 	if (!pV)

    86 		User::Panic(_L("OOM"),0);

    87 

    88 	TBool exit=EFalse;

    89 	while(!exit)

    90 		{

    91 		TKeyCode k=test.Getch();

    92 		switch(k)

    93 			{

    94 			case '0':

    95 				console->Printf(_L("Getting Latency Values\n"));

    96 				GetLatencyValues(0,c,pV);

    97 				DumpValues(c,pV);

    98 				break;

    99 			case '1':

   100 				console->Printf(_L("Clearing Latency Values\n"));

   101 				GetLatencyValues(1,c,pV);

   102 				break;

   103 			case '2':

   104 				DisplayMaxLatencyValues();

   105 				break;

   106 			case 'x':

   107 			case 'X':

   108 				exit=ETrue;

   109 				break;

   110 			default:

   111 				break;

   112 			}

   113 		}

   114 

   115 	test.End();

   116 	return 0;

   117 	}

   118