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Added VmaDefragmentationAlgorithm_Fast - fast path for defragmentation, a completely new algorithm.

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This commit is contained in:
Adam Sawicki 2018-11-23 17:26:05 +01:00
parent da85ec36bf
commit 9a4f508f88
2 changed files with 411 additions and 29 deletions
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35
src/Tests.cpp
View File

@ -1532,20 +1532,9 @@ void TestDefragmentationFull()
DestroyAllAllocations(allocations);
}
static void TestDefragmentationGpu(uint32_t flags)
static void TestDefragmentationGpu()
{
const wchar_t* flagsName = L"0";
switch(flags)
{
case VMA_DEFRAGMENTATION_FAST_ALGORITHM_BIT:
flagsName = L"FAST";
break;
case VMA_DEFRAGMENTATION_OPTIMAL_ALGORITHM_BIT:
flagsName = L"OPTIMAL";
break;
}
wprintf(L"Test defragmentation GPU (%s)\n", flagsName);
wprintf(L"Test defragmentation GPU\n");
g_MemoryAliasingWarningEnabled = false;
std::vector<AllocInfo> allocations;
@ -1608,7 +1597,7 @@ static void TestDefragmentationGpu(uint32_t flags)
UploadGpuData(allocations.data(), allocations.size());
wchar_t fileName[MAX_PATH];
swprintf_s(fileName, L"GPU_defragmentation_%s_A_before.json", flagsName);
swprintf_s(fileName, L"GPU_defragmentation_A_before.json");
SaveAllocatorStatsToFile(fileName);
// Defragment using GPU only.
@ -1636,7 +1625,7 @@ static void TestDefragmentationGpu(uint32_t flags)
BeginSingleTimeCommands();
VmaDefragmentationInfo2 defragInfo = {};
defragInfo.flags = flags;
defragInfo.flags = 0;
defragInfo.allocationCount = (uint32_t)movableAllocCount;
defragInfo.pAllocations = allocationPtrs.data();
defragInfo.pAllocationsChanged = allocationChanged.data();
@ -1668,7 +1657,7 @@ static void TestDefragmentationGpu(uint32_t flags)
ValidateGpuData(allocations.data(), allocations.size());
swprintf_s(fileName, L"GPU_defragmentation_%s_B_after.json", flagsName);
swprintf_s(fileName, L"GPU_defragmentation_B_after.json");
SaveAllocatorStatsToFile(fileName);
// Destroy all remaining buffers.
@ -5019,18 +5008,16 @@ void Test()
{
wprintf(L"TESTING:\n");
if(false)
if(true)
{
// # Temporarily insert custom tests here
// ########################################
// ########################################
TestDefragmentationSimple();
TestDefragmentationFull();
TestDefragmentationGpu();
TestDefragmentationWholePool();
//TestDefragmentationSimple();
//TestDefragmentationFull();
//TestDefragmentationGpu(0);
//TestDefragmentationGpu(VMA_DEFRAGMENTATION_FAST_ALGORITHM_BIT);
//TestDefragmentationGpu(VMA_DEFRAGMENTATION_OPTIMAL_ALGORITHM_BIT);
return;
}
@ -5067,9 +5054,7 @@ void Test()
TestDefragmentationSimple();
TestDefragmentationFull();
TestDefragmentationWholePool();
TestDefragmentationGpu(0);
TestDefragmentationGpu(VMA_DEFRAGMENTATION_FAST_ALGORITHM_BIT);
TestDefragmentationGpu(VMA_DEFRAGMENTATION_OPTIMAL_ALGORITHM_BIT);
TestDefragmentationGpu();
// # Detailed tests
FILE* file;

405
src/vk_mem_alloc.h
View File

@ -4742,6 +4742,7 @@ public:
VkDeviceSize offset);
void ChangeSize(VkDeviceSize newSize);
void ChangeOffset(VkDeviceSize newOffset);
// pMappedData not null means allocation is created with MAPPED flag.
void InitDedicatedAllocation(
@ -5088,8 +5089,16 @@ public:
virtual bool ResizeAllocation(const VmaAllocation alloc, VkDeviceSize newSize);
////////////////////////////////////////////////////////////////////////////////
// For defragmentation
bool IsBufferImageGranularityConflictPossible(
VkDeviceSize bufferImageGranularity,
VmaSuballocationType& inOutPrevSuballocType) const;
private:
friend class VmaDefragmentationAlgorithm_Generic;
friend class VmaDefragmentationAlgorithm_Fast;
uint32_t m_FreeCount;
VkDeviceSize m_SumFreeSize;
@ -5618,7 +5627,11 @@ public:
////////////////////////////////////////////////////////////////////////////////
// To be used only while the m_Mutex is locked. Used during defragmentation.
size_t CalcAllocationCount();
size_t GetBlockCount() const { return m_Blocks.size(); }
VmaDeviceMemoryBlock* GetBlock(size_t index) const { return m_Blocks[index]; }
size_t CalcAllocationCount() const;
bool IsBufferImageGranularityConflictPossible() const;
private:
friend class VmaDefragmentationAlgorithm_Generic;
@ -5890,6 +5903,45 @@ private:
size_t srcBlockIndex, VkDeviceSize srcOffset);
};
class VmaDefragmentationAlgorithm_Fast : public VmaDefragmentationAlgorithm
{
VMA_CLASS_NO_COPY(VmaDefragmentationAlgorithm_Fast)
public:
VmaDefragmentationAlgorithm_Fast(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex);
virtual ~VmaDefragmentationAlgorithm_Fast();
virtual void AddAllocation(VmaAllocation hAlloc, VkBool32* pChanged) { ++m_AllocationCount; }
virtual void AddAll() { m_AllAllocations = true; }
virtual VkResult Defragment(
VmaVector< VmaDefragmentationMove, VmaStlAllocator<VmaDefragmentationMove> >& moves,
VkDeviceSize maxBytesToMove,
uint32_t maxAllocationsToMove);
virtual VkDeviceSize GetBytesMoved() const { return m_BytesMoved; }
virtual uint32_t GetAllocationsMoved() const { return m_AllocationsMoved; }
private:
struct BlockInfo
{
size_t origBlockIndex;
};
uint32_t m_AllocationCount;
bool m_AllAllocations;
VkDeviceSize m_BytesMoved;
uint32_t m_AllocationsMoved;
VmaVector< BlockInfo, VmaStlAllocator<BlockInfo> > m_BlockInfos;
void PreprocessMetadata();
void PostprocessMetadata();
};
struct VmaBlockDefragmentationContext
{
private:
@ -6745,6 +6797,12 @@ void VmaAllocation_T::ChangeSize(VkDeviceSize newSize)
m_Size = newSize;
}
void VmaAllocation_T::ChangeOffset(VkDeviceSize newOffset)
{
VMA_ASSERT(m_Type == ALLOCATION_TYPE_BLOCK);
m_BlockAllocation.m_Offset = newOffset;
}
VkDeviceSize VmaAllocation_T::GetOffset() const
{
switch(m_Type)
@ -8237,6 +8295,36 @@ void VmaBlockMetadata_Generic::UnregisterFreeSuballocation(VmaSuballocationList:
//VMA_HEAVY_ASSERT(ValidateFreeSuballocationList());
}
bool VmaBlockMetadata_Generic::IsBufferImageGranularityConflictPossible(
VkDeviceSize bufferImageGranularity,
VmaSuballocationType& inOutPrevSuballocType) const
{
if(bufferImageGranularity == 1 || IsEmpty())
{
return false;
}
VkDeviceSize minAlignment = VK_WHOLE_SIZE;
bool typeConflictFound = false;
for(VmaSuballocationList::const_iterator it = m_Suballocations.cbegin();
it != m_Suballocations.cend();
++it)
{
const VmaSuballocationType suballocType = it->type;
if(suballocType != VMA_SUBALLOCATION_TYPE_FREE)
{
minAlignment = VMA_MIN(minAlignment, it->hAllocation->GetAlignment());
if(VmaIsBufferImageGranularityConflict(inOutPrevSuballocType, suballocType))
{
typeConflictFound = true;
}
inOutPrevSuballocType = suballocType;
}
}
return !typeConflictFound || minAlignment >= bufferImageGranularity;
}
////////////////////////////////////////////////////////////////////////////////
// class VmaBlockMetadata_Linear
@ -11832,7 +11920,7 @@ void VmaBlockVector::DefragmentationEnd(
}
}
size_t VmaBlockVector::CalcAllocationCount()
size_t VmaBlockVector::CalcAllocationCount() const
{
size_t result = 0;
for(size_t i = 0; i < m_Blocks.size(); ++i)
@ -11842,6 +11930,26 @@ size_t VmaBlockVector::CalcAllocationCount()
return result;
}
bool VmaBlockVector::IsBufferImageGranularityConflictPossible() const
{
if(m_BufferImageGranularity == 1)
{
return false;
}
VmaSuballocationType lastSuballocType = VMA_SUBALLOCATION_TYPE_FREE;
for(size_t i = 0, count = m_Blocks.size(); i < count; ++i)
{
VmaDeviceMemoryBlock* const pBlock = m_Blocks[i];
VMA_ASSERT(m_Algorithm == 0);
VmaBlockMetadata_Generic* const pMetadata = (VmaBlockMetadata_Generic*)pBlock->m_pMetadata;
if(pMetadata->IsBufferImageGranularityConflictPossible(m_BufferImageGranularity, lastSuballocType))
{
return true;
}
}
return false;
}
void VmaBlockVector::MakePoolAllocationsLost(
uint32_t currentFrameIndex,
size_t* pLostAllocationCount)
@ -12193,6 +12301,275 @@ bool VmaDefragmentationAlgorithm_Generic::MoveMakesSense(
return false;
}
////////////////////////////////////////////////////////////////////////////////
// VmaDefragmentationAlgorithm_Fast
VmaDefragmentationAlgorithm_Fast::VmaDefragmentationAlgorithm_Fast(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex) :
VmaDefragmentationAlgorithm(hAllocator, pBlockVector, currentFrameIndex),
m_AllocationCount(0),
m_AllAllocations(false),
m_BytesMoved(0),
m_AllocationsMoved(0),
m_BlockInfos(VmaStlAllocator<BlockInfo>(hAllocator->GetAllocationCallbacks()))
{
VMA_ASSERT(VMA_DEBUG_MARGIN == 0);
}
VmaDefragmentationAlgorithm_Fast::~VmaDefragmentationAlgorithm_Fast()
{
}
VkResult VmaDefragmentationAlgorithm_Fast::Defragment(
VmaVector< VmaDefragmentationMove, VmaStlAllocator<VmaDefragmentationMove> >& moves,
VkDeviceSize maxBytesToMove,
uint32_t maxAllocationsToMove)
{
VMA_ASSERT(m_AllAllocations || m_pBlockVector->CalcAllocationCount() == m_AllocationCount);
const size_t blockCount = m_pBlockVector->GetBlockCount();
if(blockCount == 0 || maxBytesToMove == 0 || maxAllocationsToMove == 0)
{
return VK_SUCCESS;
}
PreprocessMetadata();
// Sort blocks in order from most destination.
m_BlockInfos.resize(blockCount);
for(size_t i = 0; i < blockCount; ++i)
{
m_BlockInfos[i].origBlockIndex = i;
}
VMA_SORT(m_BlockInfos.begin(), m_BlockInfos.end(), [this](const BlockInfo& lhs, const BlockInfo& rhs) -> bool {
return m_pBlockVector->GetBlock(lhs.origBlockIndex)->m_pMetadata->GetSumFreeSize() <
m_pBlockVector->GetBlock(rhs.origBlockIndex)->m_pMetadata->GetSumFreeSize();
});
// THE MAIN ALGORITHM
size_t dstBlockInfoIndex = 0;
size_t dstOrigBlockIndex = m_BlockInfos[dstBlockInfoIndex].origBlockIndex;
VmaDeviceMemoryBlock* pDstBlock = m_pBlockVector->GetBlock(dstOrigBlockIndex);
VmaBlockMetadata_Generic* pDstMetadata = (VmaBlockMetadata_Generic*)pDstBlock->m_pMetadata;
VkDeviceSize dstBlockSize = pDstMetadata->GetSize();
VkDeviceSize dstOffset = 0;
bool end = false;
for(size_t srcBlockInfoIndex = 0; !end && srcBlockInfoIndex < blockCount; ++srcBlockInfoIndex)
{
const size_t srcOrigBlockIndex = m_BlockInfos[srcBlockInfoIndex].origBlockIndex;
VmaDeviceMemoryBlock* const pSrcBlock = m_pBlockVector->GetBlock(srcOrigBlockIndex);
VmaBlockMetadata_Generic* const pSrcMetadata = (VmaBlockMetadata_Generic*)pSrcBlock->m_pMetadata;
for(VmaSuballocationList::iterator srcSuballocIt = pSrcMetadata->m_Suballocations.begin();
!end && srcSuballocIt != pSrcMetadata->m_Suballocations.end(); )
{
VmaAllocation_T* const pAlloc = srcSuballocIt->hAllocation;
const VkDeviceSize srcAllocSize = srcSuballocIt->size;
if(m_AllocationsMoved == maxAllocationsToMove ||
m_BytesMoved + srcAllocSize > maxBytesToMove)
{
end = true;
break;
}
const VkDeviceSize srcAllocOffset = srcSuballocIt->offset;
VkDeviceSize dstAllocOffset = VmaAlignUp(dstOffset, pAlloc->GetAlignment());
// If the allocation doesn't fit before the end of dstBlock, forward to next block.
while(dstBlockInfoIndex < srcBlockInfoIndex &&
dstAllocOffset + srcAllocSize > dstBlockSize)
{
++dstBlockInfoIndex;
dstOrigBlockIndex = m_BlockInfos[dstBlockInfoIndex].origBlockIndex;
pDstBlock = m_pBlockVector->GetBlock(dstOrigBlockIndex);
pDstMetadata = (VmaBlockMetadata_Generic*)pDstBlock->m_pMetadata;
dstBlockSize = pDstMetadata->GetSize();
dstOffset = 0;
dstAllocOffset = 0;
}
// Same block
if(dstBlockInfoIndex == srcBlockInfoIndex)
{
// Destination and source place overlap.
if(dstAllocOffset + srcAllocSize > srcAllocOffset)
{
// Just step over this allocation.
// TODO: Support memmove() here.
dstOffset = srcAllocOffset + srcAllocSize;
++srcSuballocIt;
}
// MOVE OPTION 1: Move the allocation inside the same block by decreasing offset.
else
{
VMA_ASSERT(dstAllocOffset < srcAllocOffset);
srcSuballocIt->offset = dstAllocOffset;
srcSuballocIt->hAllocation->ChangeOffset(dstAllocOffset);
dstOffset = dstAllocOffset + srcAllocSize;
m_BytesMoved += srcAllocSize;
++m_AllocationsMoved;
++srcSuballocIt;
VmaDefragmentationMove move = {
srcOrigBlockIndex, dstOrigBlockIndex,
srcAllocOffset, dstAllocOffset,
srcAllocSize };
moves.push_back(move);
}
}
// Different block
else
{
// MOVE OPTION 2: Move the allocation to a different block.
VMA_ASSERT(dstBlockInfoIndex < srcBlockInfoIndex);
VMA_ASSERT(dstAllocOffset + srcAllocSize <= dstBlockSize);
VmaSuballocation suballoc = *srcSuballocIt;
suballoc.offset = dstAllocOffset;
suballoc.hAllocation->ChangeBlockAllocation(m_hAllocator, pDstBlock, dstAllocOffset);
dstOffset = dstAllocOffset + srcAllocSize;
m_BytesMoved += srcAllocSize;
++m_AllocationsMoved;
VmaSuballocationList::iterator nextSuballocIt = srcSuballocIt;
++nextSuballocIt;
pSrcMetadata->m_Suballocations.erase(srcSuballocIt);
srcSuballocIt = nextSuballocIt;
pDstMetadata->m_Suballocations.push_back(suballoc);
VmaDefragmentationMove move = {
srcOrigBlockIndex, dstOrigBlockIndex,
srcAllocOffset, dstAllocOffset,
srcAllocSize };
moves.push_back(move);
}
}
}
m_BlockInfos.clear();
PostprocessMetadata();
return VK_SUCCESS;
}
void VmaDefragmentationAlgorithm_Fast::PreprocessMetadata()
{
const size_t blockCount = m_pBlockVector->GetBlockCount();
for(size_t blockIndex = 0; blockIndex < blockCount; ++blockIndex)
{
VmaBlockMetadata_Generic* const pMetadata =
(VmaBlockMetadata_Generic*)m_pBlockVector->GetBlock(blockIndex)->m_pMetadata;
pMetadata->m_FreeCount = 0;
pMetadata->m_SumFreeSize = pMetadata->GetSize();
pMetadata->m_FreeSuballocationsBySize.clear();
for(VmaSuballocationList::iterator it = pMetadata->m_Suballocations.begin();
it != pMetadata->m_Suballocations.end(); )
{
if(it->type == VMA_SUBALLOCATION_TYPE_FREE)
{
VmaSuballocationList::iterator nextIt = it;
++nextIt;
pMetadata->m_Suballocations.erase(it);
it = nextIt;
}
else
{
++it;
}
}
}
}
void VmaDefragmentationAlgorithm_Fast::PostprocessMetadata()
{
const size_t blockCount = m_pBlockVector->GetBlockCount();
for(size_t blockIndex = 0; blockIndex < blockCount; ++blockIndex)
{
VmaBlockMetadata_Generic* const pMetadata =
(VmaBlockMetadata_Generic*)m_pBlockVector->GetBlock(blockIndex)->m_pMetadata;
const VkDeviceSize blockSize = pMetadata->GetSize();
// No allocations in this block - entire area is free.
if(pMetadata->m_Suballocations.empty())
{
pMetadata->m_FreeCount = 1;
//pMetadata->m_SumFreeSize is already set to blockSize.
VmaSuballocation suballoc = {
0, // offset
blockSize, // size
VMA_NULL, // hAllocation
VMA_SUBALLOCATION_TYPE_FREE };
pMetadata->m_Suballocations.push_back(suballoc);
pMetadata->RegisterFreeSuballocation(pMetadata->m_Suballocations.begin());
}
// There are some allocations in this block.
else
{
VkDeviceSize offset = 0;
VmaSuballocationList::iterator it;
for(it = pMetadata->m_Suballocations.begin();
it != pMetadata->m_Suballocations.end();
++it)
{
VMA_ASSERT(it->type != VMA_SUBALLOCATION_TYPE_FREE);
VMA_ASSERT(it->offset >= offset);
// Need to insert preceding free space.
if(it->offset > offset)
{
++pMetadata->m_FreeCount;
const VkDeviceSize freeSize = it->offset - offset;
VmaSuballocation suballoc = {
offset, // offset
freeSize, // size
VMA_NULL, // hAllocation
VMA_SUBALLOCATION_TYPE_FREE };
VmaSuballocationList::iterator precedingFreeIt = pMetadata->m_Suballocations.insert(it, suballoc);
if(freeSize >= VMA_MIN_FREE_SUBALLOCATION_SIZE_TO_REGISTER)
{
pMetadata->m_FreeSuballocationsBySize.push_back(precedingFreeIt);
}
}
pMetadata->m_SumFreeSize -= it->size;
offset = it->offset + it->size;
}
// Need to insert trailing free space.
if(offset < blockSize)
{
++pMetadata->m_FreeCount;
const VkDeviceSize freeSize = blockSize - offset;
VmaSuballocation suballoc = {
offset, // offset
freeSize, // size
VMA_NULL, // hAllocation
VMA_SUBALLOCATION_TYPE_FREE };
VMA_ASSERT(it == pMetadata->m_Suballocations.end());
VmaSuballocationList::iterator trailingFreeIt = pMetadata->m_Suballocations.insert(it, suballoc);
if(freeSize > VMA_MIN_FREE_SUBALLOCATION_SIZE_TO_REGISTER)
{
pMetadata->m_FreeSuballocationsBySize.push_back(trailingFreeIt);
}
}
VMA_SORT(
pMetadata->m_FreeSuballocationsBySize.begin(),
pMetadata->m_FreeSuballocationsBySize.end(),
VmaSuballocationItemSizeLess());
}
VMA_HEAVY_ASSERT(pMetadata->Validate());
}
}
////////////////////////////////////////////////////////////////////////////////
// VmaBlockVectorDefragmentationContext
@ -12232,8 +12609,28 @@ void VmaBlockVectorDefragmentationContext::Begin()
const bool allAllocations = m_AllAllocations ||
m_Allocations.size() == m_pBlockVector->CalcAllocationCount();
m_pAlgorithm = vma_new(m_hAllocator, VmaDefragmentationAlgorithm_Generic)(
m_hAllocator, m_pBlockVector, m_CurrFrameIndex);
/********************************
HERE IS THE CHOICE OF DEFRAGMENTATION ALGORITHM.
********************************/
/*
Fast algorithm is supported only when certain criteria are met:
- VMA_DEBUG_MARGIN is 0.
- All allocations in this block vector are moveable.
- There is no possibility of image/buffer granularity conflict.
*/
if(VMA_DEBUG_MARGIN == 0 &&
allAllocations &&
!m_pBlockVector->IsBufferImageGranularityConflictPossible())
{
m_pAlgorithm = vma_new(m_hAllocator, VmaDefragmentationAlgorithm_Fast)(
m_hAllocator, m_pBlockVector, m_CurrFrameIndex);
}
else
{
m_pAlgorithm = vma_new(m_hAllocator, VmaDefragmentationAlgorithm_Generic)(
m_hAllocator, m_pBlockVector, m_CurrFrameIndex);
}
if(allAllocations)
{