kerneltest/e32test/nkernsa/fastsem.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:24:54 +0200
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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// e32test\nkernsa\fastsem.cpp
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// 
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//
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#define __INCLUDE_NTHREADBASE_DEFINES__
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#include <nktest/nkutils.h>
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void CheckSemaphoreCount(NFastSemaphore* aS, TInt aExpected)
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	{
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	TInt w = 0;
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	TInt r;
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	do	{
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		r = WaitWithTimeout(aS, KMinTimeout);
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		TEST_RESULT1(r==KErrNone || r==KErrTimedOut, "Invalid return code %d", r);
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		if (r == KErrNone)
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			++w;
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		} while(r == KErrNone);
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	TEST_RESULT2(w==aExpected, "Signalled %d, Waited %d", aExpected, w);
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	}
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void FSTest1(TAny* a)
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	{
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	TInt n = (TInt)a;
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	NFastSemaphore s(0);
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	TInt i;
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	for (i=0; i<n; ++i) NKern::FSSignal(&s);
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	CheckSemaphoreCount(&s, n);
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	NKern::FSSignalN(&s, n);
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	CheckSemaphoreCount(&s, n);
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	}
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#define DO_FS_TEST1(n,a)	CreateThreadAndWaitForExit("FSTest1", &FSTest1, 12, (TAny*)(n), 0, -1, (a))
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struct SFSTest2Info
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	{
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	NFastSemaphore iSem;
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	volatile TInt iBlockCount;
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	volatile TInt iSignals;
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	volatile TInt iWaits;
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	volatile TBool iStart;
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	volatile TBool iStop;
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	};
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void FSTest2Signaller0(TAny* a)
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	{
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	SFSTest2Info& info = *(SFSTest2Info*)a;
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	while (!info.iStart)
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		{
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		}
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//	NThreadBase* t = info.iSem.iOwningThread;
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	while (!info.iStop)
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		{
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		++info.iBlockCount;
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		__e32_atomic_add_ord32(&info.iSignals, 1);
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		NKern::FSSignal(&info.iSem);
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		}
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	TEST_PRINT1("Ran %d times", info.iBlockCount);
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	}
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#ifdef __SMP__
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class NKTest
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	{
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public:
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	static TBool ThreadIsBlocked(NThreadBase* aT)
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		{ return aT->iWaitState.ThreadIsBlocked(); }
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	};
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#endif
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void FSTest2Signaller(TAny* a)
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	{
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	SFSTest2Info& info = *(SFSTest2Info*)a;
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	while (!info.iStart)
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		{
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		}
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	NThreadBase* t = info.iSem.iOwningThread;
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	TInt count0=0;
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	TInt countneg=0;
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	TInt blocked=0;
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	TInt prev_block_count = info.iBlockCount;
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	TInt tries = 1;
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	TUint32 seed[2];
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	seed[0] = NKern::CurrentCpu()+1;
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	seed[1] = 0;
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	while (!info.iStop)
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		{
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		TInt c = info.iSem.iCount;
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		if (c>=1)
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			continue;
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		if (--tries==0)
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			{
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			TInt bc;
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			do	{
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				bc = info.iBlockCount;
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				} while (bc<=prev_block_count);
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			prev_block_count = bc;
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			tries = random(seed) & 127;
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			tries += 71;
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   113
			}
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		TUint32 x = random(seed) & 63;
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		while (x)
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			--x;
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		c = info.iSem.iCount;
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		NKern::FSSignal(&info.iSem);
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		__e32_atomic_add_ord32(&info.iSignals, 1);
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		if (c==0) ++count0;
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   121
		if (c<0) ++countneg;
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   122
#ifdef __SMP__
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		if (NKTest::ThreadIsBlocked(t)) ++blocked;
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   124
#else
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		if (t->iNState == NThread::EWaitFastSemaphore) ++blocked;
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   126
#endif
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		}
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	TEST_PRINT1("Count =0 %d times", count0);
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   129
	TEST_PRINT1("Count <0 %d times", countneg);
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   130
	TEST_PRINT1("Blocked  %d times", blocked);
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   131
	}
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   132
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   133
void FSTest2(TAny* a)
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	{
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	SFSTest2Info& info = *(SFSTest2Info*)a;
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	NFastSemaphore exitSem(0);
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   137
	NKern::FSSetOwner(&info.iSem, 0);
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   138
	info.iBlockCount = 0;
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   139
	info.iWaits = 0;
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	info.iSignals = 0;
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   141
	info.iStart = FALSE;
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	info.iStop = FALSE;
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   143
	TInt cpu;
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	TInt threads = 0;
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	TInt this_cpu = NKern::CurrentCpu();
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   146
	for_each_cpu(cpu)
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   147
		{
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   148
		if (cpu==this_cpu)
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			CreateThreadSignalOnExit("FSTest2Sig0", &FSTest2Signaller0, 11, a, 0, KSmallTimeslice, &exitSem, cpu);
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		else
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			CreateThreadSignalOnExit("FSTest2Sig", &FSTest2Signaller, 12, a, 0, KSmallTimeslice, &exitSem, cpu);
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   152
		++threads;
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   153
		}
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   154
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	info.iStart = TRUE;
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   156
	while(info.iWaits < 1048576)
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   157
		{
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   158
		NKern::FSWait(&info.iSem);
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   159
		++info.iWaits;
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   160
		}
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   161
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   162
	info.iStop = TRUE;
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   163
	while (threads--)
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   164
		NKern::FSWait(&exitSem);
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   165
	TEST_PRINT1("Leftover signals %d", info.iSignals-info.iWaits);
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   166
	TInt r;
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   167
	do	{
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   168
		r = WaitWithTimeout(&info.iSem, KMinTimeout);
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   169
		TEST_RESULT1(r==KErrNone || r==KErrTimedOut, "Invalid return code %d", r);
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   170
		if (r == KErrNone)
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   171
			++info.iWaits;
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   172
		} while(r == KErrNone);
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   173
	TEST_PRINT2("Signalled %d, Waited %d", info.iSignals, info.iWaits);
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   174
	TEST_RESULT(info.iWaits==info.iSignals, "MISMATCH!");
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   175
	}
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   176
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   177
void DoFsTest2()
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   178
	{
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   179
	SFSTest2Info info;
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   180
	CreateThreadAndWaitForExit("FSTest2", &FSTest2, 12, (TAny*)&info, 0, KSmallTimeslice, 0);
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   181
	}
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   182
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   183
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   184
void TestFastSemaphore()
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   185
	{
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   186
	TEST_PRINT("Testing Fast Semaphores...");
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   187
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   188
	TInt cpu;
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   189
	for_each_cpu(cpu)
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parents:
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   190
		{
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parents:
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   191
		DO_FS_TEST1(0,cpu);
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parents:
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   192
		DO_FS_TEST1(1,cpu);
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parents:
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   193
		DO_FS_TEST1(2,cpu);
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parents:
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   194
		DO_FS_TEST1(13,cpu);
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   195
		}
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parents:
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   196
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   197
	DoFsTest2();
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parents:
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   198
	}