author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:34:56 +0100 | |
branch | RCL_3 |
changeset 44 | 3e88ff8f41d5 |
parent 41 | 0ffb4e86fcc9 |
permissions | -rw-r--r-- |
0 | 1 |
// Copyright (c) 2006-2009 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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// f32\sfile\sf_cache_man.cpp |
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// |
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// |
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/** |
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@file |
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@internalTechnology |
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*/ |
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#include <e32std.h> |
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#include <e32std_private.h> |
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#include "sf_std.h" |
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#include <e32uid.h> |
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#include <e32wins.h> |
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#include <f32file.h> |
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#include <hal.h> |
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#include "sf_cache_man.h" |
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#include "sf_cache_client.h" |
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#include "sf_file_cache.h" |
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#include "sf_file_cache_defs.h" |
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//#undef __SIMULATE_LOCK_FAILURES__ |
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//#define __RAMDOM_LOCK_FAILURES__ |
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//#define __PSEUDO_RANDOM_FAILURES__ |
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//#define __LOCK_ENTIRE_CACHELINE__ |
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#ifdef __RAMDOM_LOCK_FAILURES__ |
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#include <e32math.h> |
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#endif |
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#define CACHE_NUM_TO_ADDR(n) (iBase + (n << iCacheLineSizeLog2)) |
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#define ADDR_TO_CACHELINE_ADDR(a) ((((a - iBase) >> iCacheLineSizeLog2) << iCacheLineSizeLog2) + iBase) |
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#define ADDR_TO_INDEX(a) ((a - iBase) >> iCacheLineSizeLog2) |
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#if defined(_DEBUG) |
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#define __CACHELINE_INVARIANT(aCacheLine) \ |
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__ASSERT_DEBUG( \ |
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aCacheLine.iDirtySegments <= aCacheLine.iFilledSegments && \ |
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aCacheLine.iFilledSegments <= aCacheLine.iAllocatedSegments, \ |
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Fault(EInvalidCacheLine)); |
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#else |
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#define __CACHELINE_INVARIANT(aCacheLine) |
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#endif |
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const TInt KSegmentSize = 4096; |
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const TInt KSegmentSizeLog2 = 12; |
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const TInt64 KSegmentSizeMask = MAKE_TINT64(0x7FFFFFFF,0xFFFFF000); |
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const TInt KCacheLineSizeLog2 = 17; // 128K |
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const TInt KCacheLineSize = (1 << KCacheLineSizeLog2 ); |
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const TInt KCacheLineSizeInSegments = (KCacheLineSize >> KSegmentSizeLog2); |
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CCacheManager* CCacheManagerFactory::iCacheManager = NULL; |
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LOCAL_C void Fault(TCacheManagerFault aFault) |
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// |
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// Report a fault in the cache manager |
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// |
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{ |
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User::Panic(_L("FSCACHEMAN"), aFault); |
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} |
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/* |
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Indicates if a number passed in is a power of two |
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@param aNum number to be tested |
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@return Flag to indicate the result of the test |
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*/ |
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LOCAL_C TBool IsPowerOfTwo(TInt aNum) |
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{ |
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return (aNum != 0 && (aNum & -aNum) == aNum); |
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} |
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//******************** |
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// CCacheManagerFactory |
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//******************** |
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void CCacheManagerFactory::CreateL() |
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{ |
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__ASSERT_ALWAYS(iCacheManager == NULL, Fault(ECacheAlreadyCreated)); |
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if (TGlobalFileCacheSettings::Enabled()) |
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{ |
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iCacheManager = CCacheManager::NewCacheL(TGlobalFileCacheSettings::CacheSize()); |
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} |
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else |
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{ |
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Destroy(); |
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} |
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} |
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CCacheManager* CCacheManagerFactory::CacheManager() |
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{ |
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return iCacheManager; |
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} |
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TInt CCacheManagerFactory::Destroy() |
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{ |
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delete iCacheManager; |
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iCacheManager = NULL; |
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return KErrNone; |
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} |
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//******************** |
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// CCacheManager |
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//******************** |
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CCacheManager* CCacheManager::NewCacheL(TInt aCacheSize) |
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{ |
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CCacheManager* cacheManager = new (ELeave) CCacheManager(aCacheSize); |
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CleanupStack::PushL(cacheManager); |
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cacheManager->ConstructL(); |
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CleanupStack::Pop(1, cacheManager); |
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return cacheManager; |
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} |
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CCacheManager::~CCacheManager() |
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{ |
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CacheLock(); |
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iFreeQueue.Close(); |
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iUsedQueue.Close(); |
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delete [] iCacheLines; |
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CacheUnlock(); |
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iLock.Close(); |
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iChunk.Close(); |
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} |
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CCacheManager::CCacheManager(TUint aCacheSize) |
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{ |
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// Get the page size |
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TInt pageSize; |
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TInt r = HAL::Get(HAL::EMemoryPageSize, pageSize); |
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if (r != KErrNone) |
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pageSize = KSegmentSize; |
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__ASSERT_ALWAYS(IsPowerOfTwo(pageSize), Fault(EIllegalPageSize)); |
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// For the time being we only a support page size of 4K and we assume |
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// that page size = segment size, since the extra overhead of supporting |
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// variable page sizes now is non-trivial. |
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// |
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// If a processor with a different page size needs to be supported |
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// in the future, then we need to either rework this code to be able to |
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// devide up pages into smaller segments or analyze the impact of having |
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// a different page size on performance. |
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__ASSERT_ALWAYS(pageSize == KSegmentSize, Fault(EIllegalPageSize)); |
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iCacheLineSize = KCacheLineSize; |
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iCacheLineSizeLog2 = KCacheLineSizeLog2; |
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iCacheSize = aCacheSize; |
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iSegmentsPerCacheLine = 1 << (iCacheLineSizeLog2 - KSegmentSizeLog2); |
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iMaxLockedSegments = TGlobalFileCacheSettings::MaxLockedSize() >> KSegmentSizeLog2; |
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#ifdef __SIMULATE_LOCK_FAILURES__ |
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41
0ffb4e86fcc9
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
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iSimulateLockFailureMode = EFalse; // off by default unless switched on by KControlIoSimulateLockFailureMode |
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#endif |
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} |
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void CCacheManager::ConstructL() |
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{ |
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// calculate the low-memory threshold below which we fail any attempt to allocate memory |
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TMemoryInfoV1Buf meminfo; |
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TInt r = UserHal::MemoryInfo(meminfo); |
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__ASSERT_ALWAYS(r==KErrNone,Fault(EMemoryInfoFailed)); |
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iLowMemoryThreshold = (meminfo().iTotalRamInBytes * TGlobalFileCacheSettings::LowMemoryThreshold()) / 100; |
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__CACHE_PRINT4(_L("CACHEMAN: totalRAM %d freeRAM %d KDefaultLowMemoryThresholdPercent %d iLowMemoryThreshold %d"), |
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meminfo().iTotalRamInBytes, meminfo().iFreeRamInBytes, KDefaultLowMemoryThreshold, iLowMemoryThreshold); |
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__CACHE_PRINT1(_L("CACHEMAN: iCacheSize %d"), iCacheSize); |
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TChunkCreateInfo createInfo; |
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createInfo.SetCache(iCacheSize); |
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createInfo.SetOwner(EOwnerProcess); |
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r = iChunk.Create(createInfo); |
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User::LeaveIfError(r); |
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TInt mm = UserSvr::HalFunction(EHalGroupKernel, EKernelHalMemModelInfo, 0, 0) & EMemModelTypeMask; |
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if (mm < EMemModelTypeFlexible) |
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{ |
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// On memory models before flexible, File System has to register chunks that will be DMA-ed. |
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// On flexible memory model, local media is using new physical pinning Kernel interface that |
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// doesn't require registration of the chunk. |
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UserSvr::RegisterTrustedChunk(iChunk.Handle()); |
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} |
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__ASSERT_ALWAYS(iCacheSize > KSegmentSize, Fault(EIllegalCacheSize)); |
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r = iLock.CreateLocal(); |
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User::LeaveIfError(r); |
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iNumOfCacheLines = iCacheSize >> iCacheLineSizeLog2; |
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iBase = Base(); |
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iCacheLines = new (ELeave) TCacheLine[iNumOfCacheLines]; |
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for (TInt n=0; n<iNumOfCacheLines; n++) |
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{ |
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// coverity[var_decl] |
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TCacheLine cacheLine; |
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cacheLine.iAddr = CACHE_NUM_TO_ADDR(n); |
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cacheLine.iAllocatedSegments = 0; |
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cacheLine.iFilledSegments = 0; |
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cacheLine.iDirtySegments = 0; |
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cacheLine.iLockCount = 0; |
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cacheLine.iLockedSegmentStart = 0; |
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cacheLine.iLockedSegmentCount = 0; |
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cacheLine.iClient = NULL; |
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// coverity[uninit_use] |
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iCacheLines[n] = cacheLine; |
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r = iFreeQueue.Append(&iCacheLines[n]); |
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User::LeaveIfError(r); |
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} |
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} |
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CCacheClient* CCacheManager::CreateClientL() |
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{ |
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CCacheClient* client = CCacheClient::NewL(*this); |
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return client; |
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} |
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void CCacheManager::RegisterClient(CCacheClient& /*aClient*/) |
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{ |
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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iStats.iFileCount++; |
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#endif |
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} |
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void CCacheManager::DeregisterClient(CCacheClient& /*aClient*/) |
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{ |
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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iStats.iFileCount--; |
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#endif |
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} |
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void CCacheManager::FreeMemoryChanged(TBool aMemoryLow) |
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{ |
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iMemoryLow = aMemoryLow; |
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} |
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TBool CCacheManager::TooManyLockedSegments() |
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{ |
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return (iLockedSegmentCount >= iMaxLockedSegments)?(TBool)ETrue:(TBool)EFalse; |
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} |
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TInt CCacheManager::SegmentSize() |
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{ |
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return KSegmentSize; |
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} |
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TInt CCacheManager::SegmentSizeLog2() |
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{ |
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return KSegmentSizeLog2; |
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} |
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TInt64 CCacheManager::SegmentSizeMask() |
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{ |
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return KSegmentSizeMask; |
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} |
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TInt CCacheManager::CacheLineSize() |
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{ |
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return KCacheLineSize; |
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} |
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TInt CCacheManager::CacheLineSizeInSegments() |
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{ |
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return KCacheLineSizeInSegments; |
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} |
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TInt CCacheManager::CacheLineSizeLog2() |
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{ |
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return KCacheLineSizeLog2; |
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} |
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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TFileCacheStats& CCacheManager::Stats() |
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{ |
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iStats.iFreeCount = iFreeQueue.Count(); |
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iStats.iUsedCount = iUsedQueue.Count(); |
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iStats.iLockedSegmentCount = iLockedSegmentCount; |
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iStats.iFilesOnClosedQueue = TClosedFileUtils::Count(); |
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__ASSERT_DEBUG(iStats.iFreeCount >= 0, Fault(EInvalidStats)); |
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__ASSERT_DEBUG(iStats.iUsedCount >= 0, Fault(EInvalidStats)); |
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__ASSERT_DEBUG(iStats.iLockedSegmentCount >= 0, Fault(EInvalidStats)); |
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__ASSERT_DEBUG(iStats.iFilesOnClosedQueue >= 0, Fault(EInvalidStats)); |
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return iStats; |
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} |
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#endif // #if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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void CCacheManager::CacheLock() |
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{ |
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iLock.Wait(); |
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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iManagerLocked = ETrue; |
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#endif |
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} |
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void CCacheManager::CacheUnlock() |
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{ |
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#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
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iManagerLocked = EFalse; |
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#endif |
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iLock.Signal(); |
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} |
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TInt CCacheManager::AllocateAndLockCacheLine(CCacheClient* aClient, TInt64 aPos, const TCacheLine*& aCacheLine, TInt aSegmentCount) |
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{ |
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__ASSERT_DEBUG(aSegmentCount <= iSegmentsPerCacheLine, Fault(EInvalidAllocCount)); |
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// check for low system memory |
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TMemoryInfoV1Buf meminfo; |
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TInt r = UserHal::MemoryInfo(meminfo); |
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__ASSERT_ALWAYS(r==KErrNone,Fault(EMemoryInfoFailed)); |
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if (iMemoryLow || (meminfo().iFreeRamInBytes < iLowMemoryThreshold)) |
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{ |
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__CACHE_PRINT(_L("CACHEMAN: free RAM below threshold !!!")); |
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return KErrNoMemory; |
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} |
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CacheLock(); |
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__CACHE_PRINT1(_L("CACHEMAN: Allocate %d segments, Lock %d"), aSegmentCount); |
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__CACHE_PRINT2(_L("CACHEMAN: iFreeQueue %d iUsedQueue %d"), iFreeQueue.Count(), iUsedQueue.Count()); |
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#ifdef __SIMULATE_LOCK_FAILURES__ |
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if (SimulatedFailure(iAllocFailureCount)) |
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{ |
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__CACHE_PRINT(_L("CACHEMAN: simulating allocation failure")); |
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CacheUnlock(); |
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return KErrNoMemory; |
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} |
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#endif |
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// any cachelines free ? |
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TInt freeCacheLines = iFreeQueue.Count(); |
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TCacheLine* cacheLine = NULL; |
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if (freeCacheLines == 0 && !StealCacheLine(aClient)) |
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{ |
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CacheUnlock(); |
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return KErrNotFound; |
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} |
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cacheLine = iFreeQueue[0]; |
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__CACHELINE_INVARIANT((*cacheLine)); |
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__ASSERT_DEBUG( cacheLine->iAllocatedSegments == 0, Fault(EInvalidAllocCount)); |
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__ASSERT_DEBUG( cacheLine->iFilledSegments == 0, Fault(EInvalidFillCount)); |
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__ASSERT_DEBUG( cacheLine->iDirtySegments == 0, Fault(EInvalidFillCount)); |
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__ASSERT_DEBUG( cacheLine->iLockCount == 0, Fault(EInvalidLockCount)); |
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__ASSERT_DEBUG( cacheLine->iLockedSegmentStart == 0, Fault(EInvalidLockedPageStart)); |
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__ASSERT_DEBUG( cacheLine->iLockedSegmentCount == 0, Fault(EInvalidLockedPageCount)); |
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__ASSERT_DEBUG( cacheLine->iClient == NULL, Fault(EInvalidClient)); |
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TUint8* addr = cacheLine->iAddr; |
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// Commit it |
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r = Commit(addr, aSegmentCount); |
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if (r != KErrNone) |
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{ |
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CacheUnlock(); |
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return r; |
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} |
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cacheLine->iAllocatedSegments = (TUint8) (aSegmentCount); |
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cacheLine->iLockedSegmentStart = 0; |
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cacheLine->iLockedSegmentCount = (TUint8) aSegmentCount; |
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// Add to used queue |
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r = iUsedQueue.InsertInAddressOrder(cacheLine); |
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if (r != KErrNone) |
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{ |
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Decommit(addr, aSegmentCount); |
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CacheUnlock(); |
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return r; |
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} |
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cacheLine->iClient = aClient; |
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cacheLine->iPos = aPos; |
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// Remove from free queue |
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iFreeQueue.Remove(0); |
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// RChunk will lock segments initially unless explicitly unlocked |
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cacheLine->iLockCount++; |
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__CACHE_PRINT2(_L("CACHEMAN: LockCount for %08X is %d"), cacheLine->iAddr, cacheLine->iLockCount); |
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CacheUnlock(); |
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aCacheLine = cacheLine; |
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return r; |
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} |
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/** |
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CCacheManager::ExtendCacheLine() |
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Attempts to extend the length of an existing cacheline by committing extra segments |
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The cacheline must be owned and locked already. |
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@param aCacheLine A reference to a locked, owned cacheline |
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@param aSegmentCount The new length of the cacheline (including the existing segments) |
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This must be greater then the existing length. |
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@return KErrNone if successful |
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or other system wide error code. |
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*/ |
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TInt CCacheManager::ExtendCacheLine(CCacheClient* aClient, const TCacheLine& aCacheLine, TInt aSegmentCount) |
|
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{ |
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CacheLock(); |
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__ASSERT_DEBUG(aSegmentCount > 0, Fault(EInvalidSegmentCount)); |
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448 |
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TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
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__CACHELINE_INVARIANT((cacheLine)); |
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__ASSERT_DEBUG(aSegmentCount <= iSegmentsPerCacheLine, Fault(EInvalidSegmentCount)); |
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__ASSERT_DEBUG(aSegmentCount > cacheLine.iAllocatedSegments, Fault(EInvalidSegmentCount)); |
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__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(EInvalidLockCount)); // must be locked already |
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__ASSERT_ALWAYS(cacheLine.iClient == aClient, Fault(EExtendingUnownedCacheline)); |
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// ensure all pages in cachline are locked |
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__ASSERT_DEBUG(cacheLine.iLockedSegmentStart == 0, Fault(EInvalidLockRange)); |
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__ASSERT_DEBUG(cacheLine.iLockedSegmentCount == cacheLine.iAllocatedSegments, Fault(EInvalidLockRange)); |
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__CACHE_PRINT2(_L("CACHEMAN: ExtendCacheLine(%08X, %d)"), cacheLine.iAddr, aSegmentCount); |
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// Commit the new segments |
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TUint8* addrNewSegment = cacheLine.iAddr + (cacheLine.iAllocatedSegments << KSegmentSizeLog2); |
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TInt segmentCountNew = aSegmentCount - cacheLine.iAllocatedSegments; |
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465 |
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466 |
TInt r = Commit(addrNewSegment, segmentCountNew); |
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467 |
if (r == KErrNone) |
|
468 |
{ |
|
469 |
cacheLine.iAllocatedSegments = cacheLine.iLockedSegmentCount = (TUint8) aSegmentCount; |
|
470 |
} |
|
471 |
||
472 |
||
473 |
CacheUnlock(); |
|
474 |
return r; |
|
475 |
} |
|
476 |
||
477 |
/** |
|
478 |
CCacheManager::ReUseCacheLine() |
|
479 |
||
480 |
Attempts to lock and then extend or shrink an already owned cacheline, ready for re-use. |
|
481 |
If successful the cacheline is returned locked and all segments are marked as empty. |
|
482 |
The cacheline must initially be unlocked. |
|
483 |
||
484 |
@param aCacheLine A reference to an unlocked cacheline |
|
485 |
@param aSegmentCount The new length of the cacheline; |
|
486 |
this may be greater or less than the existing length. |
|
487 |
||
488 |
@return KErrNone if successful |
|
489 |
or other system wide error code. |
|
490 |
*/ |
|
491 |
TInt CCacheManager::ReAllocateAndLockCacheLine(CCacheClient* aClient, TInt64 aPos, const TCacheLine& aCacheLine, TInt aSegmentCount) |
|
492 |
{ |
|
493 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
494 |
__CACHELINE_INVARIANT((cacheLine)); |
|
495 |
||
496 |
__ASSERT_DEBUG(aSegmentCount > 0, Fault(EInvalidSegmentCount)); |
|
497 |
__ASSERT_DEBUG(aSegmentCount <= iSegmentsPerCacheLine, Fault(EInvalidSegmentCount)); |
|
498 |
||
499 |
__CACHE_PRINT2(_L("CACHEMAN: ReUseCacheLine(%08X, %d)"), cacheLine.iAddr, aSegmentCount); |
|
500 |
||
501 |
TInt r; |
|
502 |
// old cacheline same size or bigger ? |
|
503 |
if (cacheLine.iAllocatedSegments >= aSegmentCount) |
|
504 |
{ |
|
505 |
r = LockCacheLine(aClient, aCacheLine, 0, aSegmentCount); |
|
506 |
if (r!= KErrNone) |
|
507 |
return r; |
|
508 |
if (cacheLine.iAllocatedSegments > aSegmentCount) |
|
509 |
{ |
|
510 |
cacheLine.iFilledSegments = (TUint8) aSegmentCount; |
|
511 |
RemoveEmptySegments(aClient, aCacheLine); |
|
512 |
} |
|
513 |
} |
|
514 |
// old cacheline smaller |
|
515 |
else |
|
516 |
{ |
|
517 |
r = LockCacheLine(aClient, aCacheLine, 0, cacheLine.iAllocatedSegments); |
|
518 |
if (r != KErrNone) |
|
519 |
return r; |
|
520 |
r = ExtendCacheLine(aClient, aCacheLine, aSegmentCount); |
|
521 |
if (r != KErrNone) |
|
522 |
{ |
|
523 |
UnlockCacheLine(aClient, aCacheLine); |
|
524 |
return r; |
|
525 |
} |
|
526 |
} |
|
527 |
cacheLine.iFilledSegments = 0; |
|
528 |
cacheLine.iPos = aPos; |
|
529 |
||
530 |
return KErrNone; |
|
531 |
} |
|
532 |
||
533 |
||
534 |
/** |
|
535 |
CCacheManager::LockCacheLine() |
|
536 |
||
537 |
@return KErrNone on success |
|
538 |
*/ |
|
539 |
TInt CCacheManager::LockCacheLine( |
|
540 |
CCacheClient* aClient, |
|
541 |
const TCacheLine& aCacheLine, |
|
542 |
TInt aLockedPageStart, |
|
543 |
TInt aLockedPageCount) |
|
544 |
{ |
|
545 |
CacheLock(); |
|
546 |
||
547 |
||
548 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
549 |
__CACHELINE_INVARIANT((cacheLine)); |
|
550 |
||
551 |
// has the cacheline been stolen ? |
|
552 |
if (cacheLine.iClient != aClient) |
|
553 |
{ |
|
554 |
__CACHE_PRINT(_L("CCacheManager::LockCacheLine(), Cacheline Stolen !\n")); |
|
555 |
CacheUnlock(); |
|
556 |
return KErrNotFound; |
|
557 |
} |
|
558 |
||
559 |
// validate lock range |
|
560 |
__ASSERT_DEBUG(aLockedPageStart >= 0, Fault(EInvalidLockRange)); |
|
561 |
__ASSERT_DEBUG(aLockedPageStart + aLockedPageCount <= cacheLine.iAllocatedSegments, Fault(EInvalidLockRange)); |
|
562 |
__ASSERT_DEBUG(aLockedPageCount <= iSegmentsPerCacheLine, Fault(EInvalidLockRange)); |
|
563 |
// if already locked, don't allow lock range to grow down or up (to simplify code) |
|
564 |
__ASSERT_DEBUG(cacheLine.iLockCount == 0 || |
|
565 |
aLockedPageStart >= cacheLine.iLockedSegmentStart, |
|
566 |
Fault(EInvalidLockRange)); |
|
567 |
__ASSERT_DEBUG(cacheLine.iLockCount == 0 || |
|
568 |
aLockedPageStart + aLockedPageCount <= cacheLine.iLockedSegmentStart + cacheLine.iLockedSegmentCount, |
|
569 |
Fault(EInvalidLockRange)); |
|
570 |
||
571 |
__CACHE_PRINT1(_L("CACHEMAN: LockCacheLine(%08X, %d)"), cacheLine.iAddr); |
|
572 |
||
573 |
if (InUse(aCacheLine)) |
|
574 |
{ |
|
575 |
__CACHE_PRINT(_L("CCacheManager::LockCacheLine(), Cacheline in use !\n")); |
|
576 |
CacheUnlock(); |
|
577 |
return KErrInUse; |
|
578 |
} |
|
579 |
||
580 |
TInt lockErr = KErrNone; |
|
581 |
||
582 |
// increment the lock count |
|
583 |
// if not already locked, lock requested segments |
|
584 |
if (cacheLine.iLockCount++ == 0) |
|
585 |
{ |
|
586 |
#ifdef __LOCK_ENTIRE_CACHELINE__ |
|
587 |
lockErr = Lock(cacheLine.iAddr, cacheLine.iAllocatedSegments); |
|
588 |
#else |
|
589 |
__ASSERT_DEBUG(cacheLine.iDirtySegments == 0, Fault(ELockingAndAlreadyDirty)); |
|
590 |
lockErr = Lock( cacheLine.iAddr + (aLockedPageStart<<KSegmentSizeLog2), aLockedPageCount); |
|
591 |
#endif |
|
592 |
||
593 |
if (lockErr == KErrNone) |
|
594 |
{ |
|
595 |
cacheLine.iLockedSegmentStart = (TUint8) aLockedPageStart; |
|
596 |
cacheLine.iLockedSegmentCount = (TUint8) aLockedPageCount; |
|
597 |
} |
|
598 |
else // if (lockErr != KErrNone) |
|
599 |
{ |
|
600 |
__CACHE_PRINT2(_L("CACHEMAN: LockCacheLine(%08X) failure %d"), cacheLine.iAddr, lockErr); |
|
601 |
cacheLine.iLockCount--; |
|
602 |
// NB a lock failure implies segment is decomitted |
|
603 |
FreeCacheLine(cacheLine); |
|
604 |
} |
|
605 |
} |
|
606 |
// if already locked (because cacheline is dirty) ensure lock range |
|
607 |
// isn't growing (this isn't allowed to keep the code simpler) |
|
608 |
else |
|
609 |
{ |
|
610 |
__ASSERT_DEBUG(cacheLine.iLockedSegmentStart == 0, Fault(EInvalidLockRange)); |
|
611 |
__ASSERT_DEBUG(cacheLine.iLockedSegmentCount >= aLockedPageStart + aLockedPageCount, Fault(EInvalidLockRange)); |
|
612 |
} |
|
613 |
||
614 |
CacheUnlock(); |
|
615 |
return lockErr; |
|
616 |
} |
|
617 |
||
618 |
/** |
|
619 |
UnlockCacheLine() |
|
620 |
*/ |
|
621 |
TBool CCacheManager::UnlockCacheLine(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
622 |
{ |
|
623 |
CacheLock(); |
|
624 |
||
625 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
626 |
__CACHELINE_INVARIANT((cacheLine)); |
|
627 |
||
628 |
__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(EInvalidLockCount)); |
|
629 |
__ASSERT_ALWAYS(cacheLine.iClient == aClient, Fault(EUnlockingUnownedCacheline)); |
|
630 |
||
631 |
||
632 |
__CACHE_PRINT2(_L("CACHEMAN: UnlockCacheLine(%08X, %d)"), cacheLine.iAddr, cacheLine.iAllocatedSegments); |
|
633 |
||
634 |
||
635 |
// decrement the lock count |
|
636 |
TBool success = ETrue; |
|
637 |
||
638 |
if (cacheLine.iLockCount > 1) |
|
639 |
{ |
|
640 |
cacheLine.iLockCount--; |
|
641 |
} |
|
642 |
else |
|
643 |
{ |
|
644 |
if (cacheLine.iDirtySegments == 0) |
|
645 |
{ |
|
646 |
cacheLine.iLockCount--; |
|
647 |
#ifdef __LOCK_ENTIRE_CACHELINE__ |
|
648 |
Unlock(cacheLine.iAddr, cacheLine.iAllocatedSegments); |
|
649 |
#else |
|
650 |
Unlock( |
|
651 |
cacheLine.iAddr + (cacheLine.iLockedSegmentStart<<KSegmentSizeLog2), |
|
652 |
cacheLine.iLockedSegmentCount); |
|
653 |
#endif |
|
654 |
||
655 |
cacheLine.iLockedSegmentStart = cacheLine.iLockedSegmentCount = 0; |
|
656 |
} |
|
657 |
else |
|
658 |
{ |
|
659 |
__CACHE_PRINT(_L("CACHEMAN: UnlockCacheLine - not unlocking segment dirty")); |
|
660 |
success = EFalse; |
|
661 |
} |
|
662 |
} |
|
663 |
||
664 |
CacheUnlock(); |
|
665 |
||
666 |
return success; |
|
667 |
} |
|
668 |
||
669 |
||
670 |
||
671 |
TBool CCacheManager::StealCacheLine(CCacheClient* aClient) |
|
672 |
{ |
|
673 |
__ASSERT_DEBUG(iManagerLocked, Fault(EManagerNotLocked)); |
|
674 |
||
675 |
TInt usedQueueSize = iUsedQueue.Count(); |
|
676 |
||
677 |
#define INC_INDEX(x) (x++, x = (x >= usedQueueSize ? 0 : x)) |
|
678 |
||
679 |
__CACHE_PRINT2(_L("CACHEMAN: StealCacheLine, iNextCacheLineToSteal %d used count %d"), iNextCacheLineToSteal, iUsedQueue.Count()); |
|
680 |
||
681 |
TInt iInitIndex = iNextCacheLineToSteal; |
|
682 |
||
683 |
// Loop through all used cachelines, starting at the last stolen |
|
684 |
// cacheline index + 1 and ending when we find a suitable cacheline |
|
685 |
// to steal or we have looped back to the start |
|
686 |
for (INC_INDEX(iNextCacheLineToSteal); |
|
687 |
iNextCacheLineToSteal != iInitIndex; |
|
688 |
INC_INDEX(iNextCacheLineToSteal)) |
|
689 |
{ |
|
690 |
TCacheLine& cacheLine = *iUsedQueue[iNextCacheLineToSteal]; |
|
691 |
if (cacheLine.iLockCount == 0 && cacheLine.iClient != aClient) |
|
692 |
{ |
|
693 |
__CACHE_PRINT3(_L("CACHEMAN: StealCacheLine, stealing %d from %08X to %08X"), |
|
694 |
iNextCacheLineToSteal, cacheLine.iClient, aClient); |
|
695 |
FreeCacheLine(cacheLine); |
|
696 |
return ETrue; |
|
697 |
} |
|
698 |
} |
|
699 |
return EFalse; |
|
700 |
} |
|
701 |
||
702 |
||
703 |
TBool CCacheManager::FreeCacheLine(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
704 |
{ |
|
705 |
CacheLock(); |
|
706 |
||
707 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
708 |
__CACHELINE_INVARIANT((cacheLine)); |
|
709 |
||
710 |
// Has the cacheline been stolen ? (Assume success if it has) |
|
711 |
if (cacheLine.iClient != aClient) |
|
712 |
{ |
|
713 |
__CACHE_PRINT(_L("CCacheManager::FreeCacheLine(), Cacheline Stolen !!!!\n")); |
|
714 |
CacheUnlock(); |
|
715 |
return ETrue; |
|
716 |
} |
|
717 |
||
718 |
// Is the cacheline locked ? |
|
719 |
if (cacheLine.iLockCount > 0) |
|
720 |
{ |
|
721 |
__CACHE_PRINT(_L("CCacheManager::FreeCacheLine(), attempt to free locked cacheline\n")); |
|
722 |
CacheUnlock(); |
|
723 |
return EFalse; |
|
724 |
} |
|
725 |
||
726 |
FreeCacheLine(cacheLine); |
|
727 |
||
728 |
CacheUnlock(); |
|
729 |
return ETrue; |
|
730 |
} |
|
731 |
||
732 |
TInt CCacheManager::LockCount(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
733 |
{ |
|
734 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
735 |
__CACHELINE_INVARIANT((cacheLine)); |
|
736 |
||
737 |
// cacheline stolen ? |
|
738 |
if (cacheLine.iClient != aClient) |
|
739 |
return 0; |
|
740 |
||
741 |
return cacheLine.iLockCount; |
|
742 |
} |
|
743 |
||
744 |
TInt CCacheManager::FillCount(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
745 |
{ |
|
746 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
747 |
__CACHELINE_INVARIANT((cacheLine)); |
|
748 |
||
749 |
// cacheline stolen ? |
|
750 |
if (cacheLine.iClient != aClient) |
|
751 |
return 0; |
|
752 |
||
753 |
return cacheLine.iFilledSegments; |
|
754 |
} |
|
755 |
||
756 |
TInt CCacheManager::DirtyCount(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
757 |
{ |
|
758 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
759 |
__CACHELINE_INVARIANT((cacheLine)); |
|
760 |
||
761 |
// cacheline stolen ? |
|
762 |
if (cacheLine.iClient != aClient) |
|
763 |
return 0; |
|
764 |
||
765 |
return cacheLine.iDirtySegments; |
|
766 |
} |
|
767 |
||
768 |
TBool CCacheManager::InUse(const TCacheLine& aCacheLine) |
|
769 |
{ |
|
770 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
771 |
__CACHELINE_INVARIANT((cacheLine)); |
|
772 |
||
773 |
// busy if lock count >= 1 and there are no dirty segments |
|
774 |
// or if lock count >= 2 and there are dirty segments |
|
775 |
return (cacheLine.iLockCount - |
|
776 |
(cacheLine.iDirtySegments?1:0)) > 0 ? (TBool)ETrue : (TBool)EFalse; |
|
777 |
} |
|
778 |
||
779 |
void CCacheManager::SetFilled(CCacheClient* aClient, const TCacheLine& aCacheLine, TInt aSegmentCount) |
|
780 |
{ |
|
781 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
782 |
__CACHELINE_INVARIANT((cacheLine)); |
|
783 |
__ASSERT_DEBUG(aSegmentCount <= iSegmentsPerCacheLine, Fault(EInvalidSegmentCount)); |
|
784 |
__ASSERT_DEBUG(aSegmentCount <= cacheLine.iAllocatedSegments , Fault(EInvalidDirtyCount)); |
|
785 |
__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(ESetFilledNotLocked)); |
|
786 |
__ASSERT_ALWAYS(cacheLine.iClient == aClient, Fault(EExtendingUnownedCacheline)); |
|
787 |
||
788 |
||
789 |
cacheLine.iFilledSegments = Max(cacheLine.iFilledSegments, (TUint8) aSegmentCount); |
|
790 |
||
791 |
__ASSERT_DEBUG(cacheLine.iFilledSegments >= cacheLine.iDirtySegments , Fault(EInvalidDirtyCount)); |
|
792 |
} |
|
793 |
||
794 |
void CCacheManager::SetDirty(CCacheClient* aClient, const TCacheLine& aCacheLine, TInt aSegmentCount) |
|
795 |
{ |
|
796 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
797 |
__CACHELINE_INVARIANT((cacheLine)); |
|
798 |
__ASSERT_DEBUG(aSegmentCount <= iSegmentsPerCacheLine, Fault(EInvalidSegmentCount)); |
|
799 |
__ASSERT_DEBUG(aSegmentCount <= cacheLine.iAllocatedSegments , Fault(EInvalidDirtyCount)); |
|
800 |
__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(ESetDirtyNotLocked)); |
|
801 |
__ASSERT_ALWAYS(cacheLine.iClient == aClient, Fault(EExtendingUnownedCacheline)); |
|
802 |
||
803 |
// ensure that lock range is valid - we insist on dirty |
|
804 |
// cachelines having all dirty pages locked up to the the last dirty page |
|
805 |
__ASSERT_DEBUG(cacheLine.iLockedSegmentStart == 0, Fault(ESetDirtyInvalidLockRange)); |
|
806 |
__ASSERT_DEBUG(cacheLine.iLockedSegmentCount >= aSegmentCount, Fault(ESetDirtyInvalidLockRange)); |
|
807 |
||
808 |
cacheLine.iFilledSegments = Max(cacheLine.iFilledSegments, (TUint8) aSegmentCount); |
|
809 |
cacheLine.iDirtySegments = Max(cacheLine.iDirtySegments, (TUint8) aSegmentCount); |
|
810 |
||
811 |
__ASSERT_DEBUG(cacheLine.iFilledSegments >= cacheLine.iDirtySegments , Fault(EInvalidDirtyCount)); |
|
812 |
} |
|
813 |
||
814 |
void CCacheManager::ClearDirty(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
815 |
{ |
|
816 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
817 |
__CACHELINE_INVARIANT((cacheLine)); |
|
818 |
__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(EClearDirtyNotLocked)); |
|
819 |
__ASSERT_ALWAYS(cacheLine.iClient == aClient, Fault(EExtendingUnownedCacheline)); |
|
820 |
||
821 |
TInt dirtySegments = cacheLine.iDirtySegments; |
|
822 |
cacheLine.iDirtySegments = 0; |
|
823 |
SetFilled(aClient, cacheLine, dirtySegments); |
|
824 |
UnlockCacheLine(aClient, cacheLine); |
|
825 |
} |
|
826 |
||
827 |
||
828 |
void CCacheManager::RemoveEmptySegments(CCacheClient* aClient, const TCacheLine& aCacheLine) |
|
829 |
{ |
|
830 |
CacheLock(); |
|
831 |
||
832 |
TCacheLine& cacheLine = const_cast<TCacheLine&>(aCacheLine); |
|
833 |
__CACHELINE_INVARIANT((cacheLine)); |
|
834 |
||
835 |
// has the cacheline been stolen ? |
|
836 |
if (cacheLine.iClient != aClient) |
|
837 |
{ |
|
838 |
__CACHE_PRINT(_L("CCacheManager::RemoveEmptySegments((), Cacheline Stolen ! !!!\n")); |
|
839 |
CacheUnlock(); |
|
840 |
return; |
|
841 |
} |
|
842 |
||
843 |
__ASSERT_DEBUG(cacheLine.iLockCount > 0, Fault(ERemovingEmptyUnlocked)); |
|
844 |
||
845 |
// Unlock any locked segments past the last filled segment |
|
846 |
TInt filledSegmentCount = cacheLine.iFilledSegments; |
|
847 |
TInt firstSegmentToUnlock; |
|
848 |
TInt segmentsToUnlock; |
|
849 |
#ifdef __LOCK_ENTIRE_CACHELINE__ |
|
850 |
firstSegmentToUnlock = filledSegmentCount; |
|
851 |
segmentsToUnlock = cacheLine.iAllocatedSegments - filledSegmentCount; |
|
852 |
#else |
|
853 |
TInt firstLockedSegment = cacheLine.iLockedSegmentStart; |
|
854 |
if (firstLockedSegment <= filledSegmentCount) |
|
855 |
{ |
|
856 |
firstSegmentToUnlock = filledSegmentCount; |
|
857 |
segmentsToUnlock = firstLockedSegment + cacheLine.iLockedSegmentCount - filledSegmentCount; |
|
858 |
} |
|
859 |
else |
|
860 |
{ |
|
861 |
firstSegmentToUnlock = firstLockedSegment; |
|
862 |
segmentsToUnlock = cacheLine.iLockedSegmentCount; |
|
863 |
} |
|
864 |
#endif |
|
865 |
TUint8* addrFirstSegmentToUnlock = |
|
866 |
cacheLine.iAddr + (firstSegmentToUnlock << KSegmentSizeLog2); |
|
867 |
if (segmentsToUnlock > 0) |
|
868 |
{ |
|
869 |
Unlock(addrFirstSegmentToUnlock, segmentsToUnlock); |
|
870 |
cacheLine.iLockedSegmentCount = |
|
871 |
(TUint8) (cacheLine.iLockedSegmentCount - segmentsToUnlock); |
|
872 |
} |
|
873 |
||
874 |
// Decommit any segments past the last filled segment |
|
875 |
Decommit( |
|
876 |
cacheLine.iAddr + (filledSegmentCount << KSegmentSizeLog2), |
|
877 |
cacheLine.iAllocatedSegments - filledSegmentCount); |
|
878 |
cacheLine.iAllocatedSegments = (TUint8) filledSegmentCount; |
|
879 |
||
880 |
CacheUnlock(); |
|
881 |
} |
|
882 |
||
883 |
||
884 |
void CCacheManager::FreeCacheLine(TCacheLine& aCacheLine) |
|
885 |
{ |
|
886 |
__ASSERT_DEBUG(iManagerLocked, Fault(EManagerNotLocked)); |
|
887 |
aCacheLine.iClient = NULL; |
|
888 |
__ASSERT_ALWAYS( (aCacheLine.iLockCount == 0), Fault(EFreeingLockedCacheLine)); |
|
889 |
__ASSERT_ALWAYS( (aCacheLine.iDirtySegments == 0), Fault(EFreeingDirtyCacheLine)); |
|
890 |
||
891 |
Decommit(aCacheLine.iAddr, aCacheLine.iAllocatedSegments); |
|
892 |
aCacheLine.iAllocatedSegments = 0; |
|
893 |
aCacheLine.iFilledSegments = 0; |
|
894 |
aCacheLine.iLockedSegmentStart = 0; |
|
895 |
aCacheLine.iLockedSegmentCount = 0; |
|
896 |
||
897 |
// Remove from used queue |
|
898 |
TInt index = iUsedQueue.FindInAddressOrder(&aCacheLine); |
|
899 |
__ASSERT_ALWAYS(index != KErrNotFound, Fault(ESegmentNotFound)); |
|
900 |
iUsedQueue.Remove(index); |
|
901 |
||
902 |
// put back on free queue |
|
903 |
// TInt r = iFreeQueue.Append(&aCacheLine); |
|
904 |
TInt r = iFreeQueue.InsertInAddressOrder(&aCacheLine); |
|
905 |
__ASSERT_ALWAYS(r == KErrNone, Fault(EAppendToFreeQueueFailed)); |
|
906 |
||
907 |
__CACHE_PRINT2(_L("CACHEMAN: FreeCacheLine, iFreeQueue %d iUsedQueue %d"), iFreeQueue.Count(), iUsedQueue.Count()); |
|
908 |
} |
|
909 |
||
910 |
||
911 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
912 |
void CCacheManager::DumpCacheLine(TCacheLine& aCacheLine) |
|
913 |
{ |
|
914 |
RDebug::Print(_L("CACHEMAN: Cacheline client %08X addr %08X pos %d alloc %d filled %d dirty %d lock %d \tData: %02X %02X %02X %02X %02X %02X %02X %02X "), |
|
915 |
aCacheLine.iClient, |
|
916 |
aCacheLine.iAddr, |
|
917 |
I64LOW(aCacheLine.iPos), |
|
918 |
||
919 |
aCacheLine.iAllocatedSegments, |
|
920 |
aCacheLine.iFilledSegments, |
|
921 |
aCacheLine.iDirtySegments, |
|
922 |
aCacheLine.iLockCount, |
|
923 |
||
924 |
aCacheLine.iAddr[0], |
|
925 |
aCacheLine.iAddr[1], |
|
926 |
aCacheLine.iAddr[2], |
|
927 |
aCacheLine.iAddr[3], |
|
928 |
aCacheLine.iAddr[4], |
|
929 |
aCacheLine.iAddr[5], |
|
930 |
aCacheLine.iAddr[6], |
|
931 |
aCacheLine.iAddr[7] |
|
932 |
); |
|
933 |
} |
|
934 |
||
935 |
void CCacheManager::DumpCache() |
|
936 |
{ |
|
937 |
CacheLock(); |
|
938 |
||
939 |
RPointerArray<CCacheClient> clients; |
|
940 |
||
941 |
RDebug::Print(_L("**** CACHEMAN: CacheLines ****\n")); |
|
942 |
TInt usedQueueSize = iUsedQueue.Count(); |
|
943 |
TInt n; |
|
944 |
for (n=0; n<usedQueueSize; n++) |
|
945 |
{ |
|
946 |
TCacheLine& cacheLine = *iUsedQueue[n]; |
|
947 |
DumpCacheLine(cacheLine); |
|
948 |
||
949 |
clients.InsertInAddressOrder(cacheLine.iClient); |
|
950 |
} |
|
951 |
||
952 |
TInt clientCount = clients.Count(); |
|
953 |
||
954 |
for (n=0; n<clientCount; n++) |
|
955 |
{ |
|
956 |
RDebug::Print(_L("**** CACHEMAN: CacheClient #%d ****\n"), n); |
|
957 |
clients[n]->DumpCache(); |
|
958 |
} |
|
959 |
||
960 |
clients.Close(); |
|
961 |
||
962 |
CacheUnlock(); |
|
963 |
} |
|
964 |
#endif |
|
965 |
||
966 |
||
967 |
||
968 |
||
969 |
TUint8* CCacheManager::Base() |
|
970 |
{ |
|
971 |
return iChunk.Base(); |
|
972 |
} |
|
973 |
||
974 |
||
975 |
TInt CCacheManager::Lock(TUint8* const aAddr, TInt aSegmentCount) |
|
976 |
{ |
|
977 |
TInt r = iChunk.Lock(aAddr-iBase, aSegmentCount << KSegmentSizeLog2); |
|
978 |
//RDebug::Print(_L("RChunk::Lock(%08X, %d) %d"), aAddr-iBase, aSegmentCount << KSegmentSizeLog2, r); |
|
979 |
__ASSERT_DEBUG(r == KErrNone || r == KErrNoMemory || r == KErrNotFound, Fault(EUnexpectedLockFailure)); |
|
980 |
||
981 |
__CACHE_PRINT3(_L("CACHEMAN: LOCK %08X %d %d"), aAddr, aSegmentCount, r); |
|
982 |
||
983 |
#ifdef __SIMULATE_LOCK_FAILURES__ |
|
984 |
if (SimulatedFailure(iLockFailureCount)) |
|
985 |
{ |
|
986 |
__CACHE_PRINT(_L("CACHEMAN: simulating lock failure")); |
|
987 |
r = KErrNotFound; |
|
988 |
} |
|
989 |
#endif |
|
990 |
||
991 |
if (r == KErrNone) |
|
992 |
{ |
|
993 |
iLockedSegmentCount+= aSegmentCount; |
|
994 |
} |
|
995 |
else |
|
996 |
{ |
|
997 |
__CACHE_PRINT(_L("CACHEMAN: LOCK FAILED")); |
|
998 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
999 |
iStats.iLockFailureCount++; |
|
1000 |
#endif |
|
1001 |
} |
|
1002 |
||
1003 |
return r; |
|
1004 |
} |
|
1005 |
||
1006 |
TInt CCacheManager::Unlock(TUint8* const aAddr, TInt aSegmentCount) |
|
1007 |
{ |
|
1008 |
TInt r = iChunk.Unlock(aAddr-iBase, aSegmentCount << KSegmentSizeLog2); |
|
1009 |
//RDebug::Print(_L("RChunk::Unlock(%08X, %d) %d"), aAddr-iBase, aSegmentCount << KSegmentSizeLog2, r); |
|
1010 |
||
1011 |
__CACHE_PRINT3(_L("CACHEMAN: UNLOCK %08X %d %d"), aAddr, aSegmentCount, r); |
|
1012 |
if (r == KErrNone) |
|
1013 |
{ |
|
1014 |
iLockedSegmentCount-= aSegmentCount; |
|
1015 |
} |
|
1016 |
else |
|
1017 |
{ |
|
1018 |
__CACHE_PRINT(_L("CACHEMAN: UNLOCK FAILED")); |
|
1019 |
} |
|
1020 |
||
1021 |
return r; |
|
1022 |
} |
|
1023 |
||
1024 |
TInt CCacheManager::Commit(TUint8* const aAddr, TInt aSegmentCount) |
|
1025 |
{ |
|
1026 |
#ifdef __SIMULATE_LOCK_FAILURES__ |
|
1027 |
if (SimulatedFailure(iCommitFailureCount)) |
|
1028 |
{ |
|
1029 |
__CACHE_PRINT(_L("CACHEMAN: simulating commit failure ")); |
|
1030 |
return KErrNoMemory; |
|
1031 |
} |
|
1032 |
#endif |
|
1033 |
||
1034 |
TInt r = iChunk.Commit(aAddr-iBase, aSegmentCount << KSegmentSizeLog2); |
|
1035 |
//RDebug::Print(_L("RChunk::Commit(%08X, %d) %d, "), aAddr-iBase, aSegmentCount << KSegmentSizeLog2, r); |
|
1036 |
||
1037 |
__CACHE_PRINT3(_L("CACHEMAN: COMMIT: %08X %d %d, "), aAddr, aSegmentCount, r); |
|
1038 |
if (r == KErrNone) |
|
1039 |
{ |
|
1040 |
iLockedSegmentCount+= aSegmentCount; |
|
1041 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
1042 |
iStats.iAllocatedSegmentCount+= aSegmentCount; |
|
1043 |
#endif |
|
1044 |
} |
|
1045 |
else |
|
1046 |
{ |
|
1047 |
__CACHE_PRINT(_L("CACHEMAN: COMMIT FAILED")); |
|
1048 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
1049 |
iStats.iCommitFailureCount++; |
|
1050 |
#endif |
|
1051 |
} |
|
1052 |
||
1053 |
||
1054 |
__ASSERT_DEBUG(r == KErrNone || r == KErrNoMemory, Fault(EUnexpectedCommitFailure)); |
|
1055 |
||
1056 |
return r; |
|
1057 |
} |
|
1058 |
||
1059 |
TInt CCacheManager::Decommit(TUint8* const aAddr, TInt aSegmentCount) |
|
1060 |
{ |
|
1061 |
TInt r = iChunk.Decommit(aAddr-iBase, aSegmentCount << KSegmentSizeLog2); |
|
1062 |
//RDebug::Print(_L("RChunk::Decommit(%08X, %d), %d"), aAddr-iBase, aSegmentCount << KSegmentSizeLog2, r); |
|
1063 |
||
1064 |
__CACHE_PRINT3(_L("CACHEMAN: DECOMMIT: %08X %d %d, "), aAddr, aSegmentCount, r); |
|
1065 |
if (r == KErrNone) |
|
1066 |
{ |
|
1067 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
1068 |
iStats.iAllocatedSegmentCount-= aSegmentCount; |
|
1069 |
#endif |
|
1070 |
} |
|
1071 |
else |
|
1072 |
{ |
|
1073 |
__CACHE_PRINT(_L("CACHEMAN: DECOMMIT FAILED")); |
|
1074 |
} |
|
1075 |
||
1076 |
return r; |
|
1077 |
} |
|
1078 |
||
1079 |
#if defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
1080 |
||
1081 |
void CCacheManager::SimulateLockFailureMode(TBool aEnable) |
|
1082 |
{ |
|
1083 |
iSimulateLockFailureMode = aEnable; |
|
1084 |
__CACHE_PRINT1(_L("CACHEMAN: SimulateLockFailureMode: %d, "), iSimulateLockFailureMode); |
|
1085 |
} |
|
1086 |
||
1087 |
void CCacheManager::AllocateMaxSegments(TBool aEnable) |
|
1088 |
{ |
|
1089 |
iAllocateMaxSegments = aEnable; |
|
1090 |
__CACHE_PRINT1(_L("CACHEMAN: iAllocateMaxSegments: %d, "), iAllocateMaxSegments); |
|
1091 |
} |
|
1092 |
||
1093 |
TBool CCacheManager::AllocateMaxSegments() |
|
1094 |
{ |
|
1095 |
return iAllocateMaxSegments; |
|
1096 |
} |
|
1097 |
||
1098 |
void CCacheManager::SimulateWriteFailure() |
|
1099 |
{ |
|
1100 |
iSimulateWriteFailure = ETrue; |
|
1101 |
} |
|
1102 |
||
1103 |
TBool CCacheManager::SimulateWriteFailureEnabled() |
|
1104 |
{ |
|
1105 |
TBool b = iSimulateWriteFailure; |
|
1106 |
iSimulateWriteFailure = EFalse; |
|
1107 |
return b; |
|
1108 |
} |
|
1109 |
||
1110 |
TBool CCacheManager::SimulatedFailure(TInt& aFailureCount) |
|
1111 |
{ |
|
1112 |
#ifdef __SIMULATE_LOCK_FAILURES__ |
|
1113 |
if (iSimulateLockFailureMode) |
|
1114 |
{ |
|
1115 |
#if defined (__RAMDOM_LOCK_FAILURES__) |
|
1116 |
static TInt FailCount = 15; |
|
1117 |
if (++aFailureCount >= FailCount) |
|
1118 |
#elif defined (__PSEUDO_RANDOM_FAILURES__) |
|
1119 |
const TInt FailCounts[] = {15,2,0,21,1,12,24}; |
|
1120 |
const TInt FailCountSize = sizeof(FailCounts) / sizeof(TInt); |
|
1121 |
static TInt FailCountIndex = 0; |
|
1122 |
if (++aFailureCount >= FailCounts[FailCountIndex]) |
|
1123 |
#else |
|
1124 |
const TInt KFailCount = 15; |
|
1125 |
if (++aFailureCount >= KFailCount) |
|
1126 |
#endif |
|
1127 |
{ |
|
1128 |
aFailureCount = 0; |
|
1129 |
#if defined (__RAMDOM_LOCK_FAILURES__) |
|
1130 |
FailCount = Math::Random() & 0x1F; |
|
1131 |
__CACHE_PRINT1(_L("FailCount %d"), FailCount); |
|
1132 |
#endif |
|
1133 |
||
1134 |
#if defined (__PSEUDO_RANDOM_FAILURES__) |
|
1135 |
FailCountIndex = (FailCountIndex +1) % FailCountSize ; |
|
1136 |
__CACHE_PRINT1(_L("FailCount %d"), FailCounts[FailCountIndex]); |
|
1137 |
#endif |
|
1138 |
||
1139 |
return ETrue; |
|
1140 |
} |
|
1141 |
} |
|
1142 |
#endif |
|
1143 |
return EFalse; |
|
1144 |
} |
|
1145 |
#endif // defined(_DEBUG) || defined(_DEBUG_RELEASE) |
|
1146 |
||
1147 |
//************************************ |
|
1148 |
// TGlobalFileCacheSettings |
|
1149 |
//************************************ |
|
1150 |
||
1151 |
//TGlobalCacheFlags TGlobalFileCacheSettings::iFlags = TGlobalCacheFlags(ECacheEnabled); |
|
1152 |
TInt32 TGlobalFileCacheSettings::iCacheSize = KDefaultGlobalCacheSize << KByteToByteShift; |
|
1153 |
TInt32 TGlobalFileCacheSettings::iMaxLockedSize = KDefaultGlobalCacheMaxLockedSize << KByteToByteShift; |
|
1154 |
TInt32 TGlobalFileCacheSettings::iLowMemoryThreshold = KDefaultLowMemoryThreshold; |
|
1155 |
TBool TGlobalFileCacheSettings::iEnabled = KDefaultGlobalCacheEnabled; |
|
1156 |
||
1157 |
_LIT8(KLitSectionNameFileCache,"FileCache"); |
|
1158 |
||
1159 |
void TGlobalFileCacheSettings::ReadPropertiesFile() |
|
1160 |
{ |
|
1161 |
F32Properties::GetBool(KLitSectionNameFileCache, _L8("GlobalCacheEnabled"), iEnabled); |
|
1162 |
||
1163 |
// Get size of cache in kilobytes |
|
1164 |
TInt32 cacheSizeInKBytes; |
|
1165 |
if (F32Properties::GetInt(KLitSectionNameFileCache, _L8("GlobalCacheSize"), cacheSizeInKBytes)) |
|
1166 |
iCacheSize = cacheSizeInKBytes << KByteToByteShift; |
|
1167 |
||
1168 |
// Get maximum amount of locked data i.e data unavailable for paging |
|
1169 |
TInt32 maxLockedSize; |
|
1170 |
if (F32Properties::GetInt(KLitSectionNameFileCache, _L8("GlobalCacheMaxLockedSize"), maxLockedSize)) |
|
1171 |
iMaxLockedSize = maxLockedSize << KByteToByteShift; |
|
1172 |
||
1173 |
// Get low memory threshold |
|
1174 |
TInt32 lowMemoryThreshold; |
|
1175 |
if (F32Properties::GetInt(KLitSectionNameFileCache, _L8("LowMemoryThreshold"), lowMemoryThreshold)) |
|
1176 |
iLowMemoryThreshold = lowMemoryThreshold; |
|
1177 |
||
1178 |
} |
|
1179 |
||
1180 |
||
1181 |
TBool TGlobalFileCacheSettings::Enabled() |
|
1182 |
{ |
|
1183 |
return iEnabled; |
|
1184 |
} |
|
1185 |
||
1186 |
TInt TGlobalFileCacheSettings::CacheSize() |
|
1187 |
{ |
|
1188 |
return iCacheSize; |
|
1189 |
} |
|
1190 |
TInt TGlobalFileCacheSettings::MaxLockedSize() |
|
1191 |
{ |
|
1192 |
return iMaxLockedSize; |
|
1193 |
} |
|
1194 |
||
1195 |
TInt TGlobalFileCacheSettings::LowMemoryThreshold() |
|
1196 |
{ |
|
1197 |
return iLowMemoryThreshold; |
|
1198 |
} |