1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/kernelhwsrv/kerneltest/e32test/bench/t_ctxsw3.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,113 @@
     1.4 +// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of the License "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +// e32test\bench\t_ctxsw3.cpp
    1.18 +// Overview:
    1.19 +// Benchmark the inter-thread context switching. 
    1.20 +// API Information:
    1.21 +// RThread, RRSemaphore.
    1.22 +// Details:
    1.23 +// - Create a semaphore.
    1.24 +// - Create a thread (thread1) with a handle to the Semaphore and 
    1.25 +// priority EPriorityLess. Verify the successful creation.
    1.26 +// - Create another thread (thread2) with a handle to the Semaphore 
    1.27 +// and priority EPriorityMuchLess. Verify the successful creation.
    1.28 +// - thread1 counts the number of times the semaphore count is decremented.
    1.29 +// - thread2 counts the number of times the semaphore count is incremented.
    1.30 +// - Display the number of times the semaphore is signalled per second.
    1.31 +// Platforms/Drives/Compatibility:
    1.32 +// All.
    1.33 +// Assumptions/Requirement/Pre-requisites:
    1.34 +// Failures and causes:
    1.35 +// Base Port information:
    1.36 +// 
    1.37 +//
    1.38 +
    1.39 +#include <e32test.h>
    1.40 +
    1.41 +RTest test(_L("T_CTXSW3"));
    1.42 +
    1.43 +LOCAL_D TInt Count;
    1.44 +
    1.45 +LOCAL_D RSemaphore StartSem;
    1.46 +
    1.47 +LOCAL_C TInt Thread1(TAny* aSemaphore)
    1.48 +	{
    1.49 +	RSemaphore s;
    1.50 +	s.SetHandle((TInt)aSemaphore);
    1.51 +	StartSem.Wait();
    1.52 +	FOREVER
    1.53 +		{
    1.54 +		s.Wait();
    1.55 +		Count++;
    1.56 +		}
    1.57 +	}
    1.58 +
    1.59 +LOCAL_C TInt Thread2(TAny* aSemaphore)
    1.60 +	{
    1.61 +	RSemaphore s;
    1.62 +	s.SetHandle((TInt)aSemaphore);
    1.63 +	StartSem.Wait();
    1.64 +	FOREVER
    1.65 +		{
    1.66 +		s.Signal();
    1.67 +		Count++;
    1.68 +		}
    1.69 +	}
    1.70 +
    1.71 +const TInt KHeapSize=4096;
    1.72 +
    1.73 +GLDEF_C TInt E32Main()
    1.74 +	{
    1.75 +	test.Title();
    1.76 +	test.Start(_L("Timing inter-thread context switches..."));
    1.77 +
    1.78 +	TInt r=StartSem.CreateLocal(0);
    1.79 +	test(r==KErrNone);
    1.80 +
    1.81 +	RSemaphore sem;
    1.82 +	r=sem.CreateLocal(0);
    1.83 +	test(r==KErrNone);
    1.84 +	RThread t1,t2;
    1.85 +	r=t1.Create(_L("Thread1"),Thread1,KDefaultStackSize,KHeapSize,KHeapSize,(TAny*)sem.Handle());
    1.86 +	test(r==KErrNone);
    1.87 +	t1.SetPriority(EPriorityLess);
    1.88 +	r=t2.Create(_L("Thread2"),Thread2,KDefaultStackSize,KHeapSize,KHeapSize,(TAny*)sem.Handle());
    1.89 +	test(r==KErrNone);
    1.90 +	t2.SetPriority(EPriorityMuchLess);
    1.91 +
    1.92 +	TRequestStatus s1,s2;
    1.93 +	t1.Logon(s1);
    1.94 +	t2.Logon(s2);
    1.95 +	t1.Resume();
    1.96 +	t2.Resume();
    1.97 +
    1.98 +	Count=0;
    1.99 +	User::After(20000);
   1.100 +	StartSem.Signal(2);
   1.101 +	User::After(2000000);
   1.102 +	TInt count=Count;
   1.103 +
   1.104 +	t2.Kill(0);
   1.105 +	User::WaitForRequest(s2);
   1.106 +	t1.Kill(0);
   1.107 +	User::WaitForRequest(s1);
   1.108 +	t2.Close();
   1.109 +	t1.Close();
   1.110 +	sem.Close();
   1.111 +
   1.112 +	test.Printf(_L("%d per second\n"),count/2);
   1.113 +
   1.114 +	test.End();
   1.115 +	return 0;
   1.116 +	}