diff options
Diffstat (limited to 'indra/llcommon/llmemory.cpp')
| -rw-r--r-- | indra/llcommon/llmemory.cpp | 98 |
1 files changed, 61 insertions, 37 deletions
diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp index ed28974163..6e804a94b0 100644 --- a/indra/llcommon/llmemory.cpp +++ b/indra/llcommon/llmemory.cpp @@ -62,7 +62,7 @@ LLPrivateMemoryPoolManager::mem_allocation_info_t LLPrivateMemoryPoolManager::sM #endif #ifndef _USE_PRIVATE_MEM_POOL_ -#define _USE_PRIVATE_MEM_POOL_ 0 +#define _USE_PRIVATE_MEM_POOL_ 1 #endif //static @@ -535,6 +535,9 @@ const char* LLMemTracker::getNextLine() //-------------------------------------------------------------------------------------------------- //-------------------------------------------------------------------------------------------------- +//minimum slot size and minimal slot size interval +const U32 ATOMIC_MEM_SLOT = 16 ; //bytes + //minimum block sizes (page size) for small allocation, medium allocation, large allocation const U32 MIN_BLOCK_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {2 << 10, 4 << 10, 16 << 10} ; // @@ -542,14 +545,30 @@ const U32 MIN_BLOCK_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {2 << 10, 4 < const U32 MAX_BLOCK_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {64 << 10, 1 << 20, 4 << 20} ; //minimum slot sizes for small allocation, medium allocation, large allocation -const U32 MIN_SLOT_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {8, 2 << 10, 512 << 10}; +const U32 MIN_SLOT_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {ATOMIC_MEM_SLOT, 2 << 10, 512 << 10}; //maximum slot sizes for small allocation, medium allocation, large allocation -const U32 MAX_SLOT_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {(2 << 10) - 8, (512 - 2) << 10, 4 << 20}; +const U32 MAX_SLOT_SIZES[LLPrivateMemoryPool::SUPER_ALLOCATION] = {(2 << 10) - ATOMIC_MEM_SLOT, (512 - 2) << 10, 4 << 20}; //size of a block with multiple slots can not exceed CUT_OFF_SIZE const U32 CUT_OFF_SIZE = (64 << 10) ; //64 KB +//max number of slots in a block +const U32 MAX_NUM_SLOTS_IN_A_BLOCK = llmin(MIN_BLOCK_SIZES[0] / ATOMIC_MEM_SLOT, ATOMIC_MEM_SLOT * 8) ; + +//------------------------------------------------------------- +//align val to be integer times of ATOMIC_MEM_SLOT +U32 align(U32 val) +{ + U32 aligned = (val / ATOMIC_MEM_SLOT) * ATOMIC_MEM_SLOT ; + if(aligned < val) + { + aligned += ATOMIC_MEM_SLOT ; + } + + return aligned ; +} + //------------------------------------------------------------- //class LLPrivateMemoryPool::LLMemoryBlock //------------------------------------------------------------- @@ -575,35 +594,36 @@ void LLPrivateMemoryPool::LLMemoryBlock::init(char* buffer, U32 buffer_size, U32 mSlotSize = slot_size ; mTotalSlots = buffer_size / mSlotSize ; - llassert_always(buffer_size / mSlotSize <= 256) ; //max number is 256 + llassert_always(buffer_size / mSlotSize <= MAX_NUM_SLOTS_IN_A_BLOCK) ; //max number is 128 mAllocatedSlots = 0 ; + mDummySize = 0 ; //init the bit map. - //mark free bits - S32 usage_bit_len = (mTotalSlots + 31) / 32 ; - mDummySize = usage_bit_len - 1 ; //if the mTotalSlots more than 32, needs extra space for bit map - if(mDummySize > 0) //reserve extra space from mBuffer to store bitmap if needed. + //mark free bits + if(mTotalSlots > 32) //reserve extra space from mBuffer to store bitmap if needed. { - mTotalSlots -= (mDummySize * sizeof(mUsageBits) + mSlotSize - 1) / mSlotSize ; - usage_bit_len = (mTotalSlots + 31) / 32 ; - mDummySize = usage_bit_len - 1 ;//number of 32bits reserved from mBuffer for bitmap + mDummySize = ATOMIC_MEM_SLOT ; + mTotalSlots -= (mDummySize + mSlotSize - 1) / mSlotSize ; + mUsageBits = 0 ; - if(mDummySize > 0) + S32 usage_bit_len = (mTotalSlots + 31) / 32 ; + + for(S32 i = 0 ; i < usage_bit_len - 1 ; i++) { - mUsageBits = 0 ; - for(S32 i = 0 ; i < mDummySize ; i++) - { - *((U32*)mBuffer + i) = 0 ; - } - if(mTotalSlots & 31) - { - *((U32*)mBuffer + mDummySize - 1) = (0xffffffff << (mTotalSlots & 31)) ; - } + *((U32*)mBuffer + i) = 0 ; } - } - - if(mDummySize < 1)//no extra bitmap space reserved + for(S32 i = usage_bit_len - 1 ; i < mDummySize / sizeof(U32) ; i++) + { + *((U32*)mBuffer + i) = 0xffffffff ; + } + + if(mTotalSlots & 31) + { + *((U32*)mBuffer + usage_bit_len - 2) = (0xffffffff << (mTotalSlots & 31)) ; + } + } + else//no extra bitmap space reserved { mUsageBits = 0 ; if(mTotalSlots & 31) @@ -642,7 +662,7 @@ char* LLPrivateMemoryPool::LLMemoryBlock::allocate() } else if(mDummySize > 0)//go to extra space { - for(S32 i = 0 ; i < mDummySize; i++) + for(S32 i = 0 ; i < mDummySize / sizeof(U32); i++) { if(*((U32*)mBuffer + i) != 0xffffffff) { @@ -668,14 +688,14 @@ char* LLPrivateMemoryPool::LLMemoryBlock::allocate() mAllocatedSlots++ ; - return mBuffer + mDummySize * sizeof(U32) + (k * 32 + idx) * mSlotSize ; + return mBuffer + mDummySize + (k * 32 + idx) * mSlotSize ; } //free a slot void LLPrivateMemoryPool::LLMemoryBlock::freeMem(void* addr) { //bit index - U32 idx = ((U32)addr - (U32)mBuffer - mDummySize * sizeof(U32)) / mSlotSize ; + U32 idx = ((U32)addr - (U32)mBuffer - mDummySize) / mSlotSize ; U32* bits = &mUsageBits ; if(idx >= 32) @@ -699,7 +719,7 @@ void LLPrivateMemoryPool::LLMemoryBlock::freeMem(void* addr) //for debug use: reset the entire bitmap. void LLPrivateMemoryPool::LLMemoryBlock::resetBitMap() { - for(S32 i = 0 ; i < mDummySize ; i++) + for(S32 i = 0 ; i < mDummySize / sizeof(U32) ; i++) { *((U32*)mBuffer + i) = 0 ; } @@ -742,7 +762,10 @@ void LLPrivateMemoryPool::LLMemoryChunk::init(char* buffer, U32 buffer_size, U32 //data buffer, which can be used for allocation mDataBuffer = (char*)mFreeSpaceList + sizeof(LLMemoryBlock*) * mPartitionLevels ; - + + //alignmnet + mDataBuffer = mBuffer + align(mDataBuffer - mBuffer) ; + //init for(U32 i = 0 ; i < mBlockLevels; i++) { @@ -1306,7 +1329,7 @@ char* LLPrivateMemoryPool::allocate(U32 size) //if the asked size larger than MAX_BLOCK_SIZE, fetch from heap directly, the pool does not manage it if(size >= CHUNK_SIZE) { - return new char[size] ; + return (char*)malloc(size) ; } char* p = NULL ; @@ -1367,7 +1390,7 @@ void LLPrivateMemoryPool::freeMem(void* addr) if(!chunk) { - delete[] (char*)addr ; //release from heap + free(addr) ; //release from heap } else { @@ -1503,7 +1526,7 @@ LLPrivateMemoryPool::LLMemoryChunk* LLPrivateMemoryPool::addChunk(S32 chunk_inde checkSize(preferred_size + overhead) ; mReservedPoolSize += preferred_size + overhead ; - char* buffer = new(std::nothrow) char[preferred_size + overhead] ; + char* buffer = (char*)malloc(preferred_size + overhead) ; if(!buffer) { return NULL ; @@ -1571,7 +1594,7 @@ void LLPrivateMemoryPool::removeChunk(LLMemoryChunk* chunk) mReservedPoolSize -= chunk->getBufferSize() ; //release memory - delete[] chunk->getBuffer() ; + free(chunk->getBuffer()) ; } U16 LLPrivateMemoryPool::findHashKey(const char* addr) @@ -1875,7 +1898,7 @@ char* LLPrivateMemoryPoolManager::allocate(LLPrivateMemoryPool* poolp, U32 size, if(!poolp) { - p = new char[size] ; + p = (char*)malloc(size) ; } else { @@ -1901,7 +1924,7 @@ char* LLPrivateMemoryPoolManager::allocate(LLPrivateMemoryPool* poolp, U32 size) #if _USE_PRIVATE_MEM_POOL_ if(!poolp) { - return new char[size] ; + return (char*)malloc(size) ; } else { @@ -1932,7 +1955,7 @@ void LLPrivateMemoryPoolManager::freeMem(LLPrivateMemoryPool* poolp, void* addr } else { - delete[] (char*)addr ; + free(addr) ; } #else free(addr) ; @@ -1942,6 +1965,7 @@ void LLPrivateMemoryPoolManager::freeMem(LLPrivateMemoryPool* poolp, void* addr //-------------------------------------------------------------------- //class LLPrivateMemoryPoolTester //-------------------------------------------------------------------- +#if 0 LLPrivateMemoryPoolTester* LLPrivateMemoryPoolTester::sInstance = NULL ; LLPrivateMemoryPool* LLPrivateMemoryPoolTester::sPool = NULL ; LLPrivateMemoryPoolTester::LLPrivateMemoryPoolTester() @@ -2168,5 +2192,5 @@ void LLPrivateMemoryPoolTester::fragmentationtest() //every time when asking for a new chunk during correctness test, and performance test, //print out the chunk usage statistices. } - +#endif //-------------------------------------------------------------------- |