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VmaDefragmentationAlgorithm_Fast: Added support for memmove() of overlapping memory regions when defragmenting on CPU.

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This commit is contained in:
Adam Sawicki 2018-11-23 17:58:00 +01:00
parent e168191f3d
commit 647cf24b7f
2 changed files with 56 additions and 15 deletions
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24
src/Tests.cpp
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@ -1375,6 +1375,30 @@ void TestDefragmentationSimple()
}
}
/*
Allocation that must be move to an overlapping place using memmove().
Create 2 buffers, second slightly bigger than the first. Delete first. Then defragment.
*/
{
AllocInfo allocInfo[2];
bufCreateInfo.size = BUF_SIZE;
CreateBuffer(pool, bufCreateInfo, false, allocInfo[0]);
const VkDeviceSize biggerBufSize = BUF_SIZE + BUF_SIZE / 256;
bufCreateInfo.size = biggerBufSize;
CreateBuffer(pool, bufCreateInfo, false, allocInfo[1]);
DestroyAllocation(allocInfo[0]);
VmaDefragmentationStats defragStats;
Defragment(&allocInfo[1], 1, nullptr, &defragStats);
// If this fails, it means we couldn't do memmove with overlapping regions.
TEST(defragStats.allocationsMoved == 1 && defragStats.bytesMoved > 0);
ValidateAllocationsData(&allocInfo[1], 1);
DestroyAllocation(allocInfo[1]);
}
vmaDestroyPool(g_hAllocator, pool);
}

47
src/vk_mem_alloc.h
View File

@ -5784,7 +5784,8 @@ public:
VmaDefragmentationAlgorithm_Generic(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex);
uint32_t currentFrameIndex,
bool overlappingMoveSupported);
virtual ~VmaDefragmentationAlgorithm_Generic();
virtual void AddAllocation(VmaAllocation hAlloc, VkBool32* pChanged);
@ -5910,7 +5911,8 @@ public:
VmaDefragmentationAlgorithm_Fast(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex);
uint32_t currentFrameIndex,
bool overlappingMoveSupported);
virtual ~VmaDefragmentationAlgorithm_Fast();
virtual void AddAllocation(VmaAllocation hAlloc, VkBool32* pChanged) { ++m_AllocationCount; }
@ -5930,6 +5932,8 @@ private:
size_t origBlockIndex;
};
const bool m_OverlappingMoveSupported;
uint32_t m_AllocationCount;
bool m_AllAllocations;
@ -5984,7 +5988,7 @@ public:
void AddAllocation(VmaAllocation hAlloc, VkBool32* pChanged);
void AddAll() { m_AllAllocations = true; }
void Begin();
void Begin(bool overlappingMoveSupported);
private:
const VmaAllocator m_hAllocator;
@ -11602,7 +11606,7 @@ void VmaBlockVector::ApplyDefragmentationMovesCpu(
}
// THE PLACE WHERE ACTUAL DATA COPY HAPPENS.
memcpy(
memmove(
reinterpret_cast<char*>(dstBlockInfo.pMappedData) + move.dstOffset,
reinterpret_cast<char*>(srcBlockInfo.pMappedData) + move.srcOffset,
static_cast<size_t>(move.size));
@ -11842,13 +11846,15 @@ void VmaBlockVector::Defragment(
m_hAllocator->IsIntegratedGpu();
}
bool overlappingMoveSupported = !defragmentOnGpu;
if(m_hAllocator->m_UseMutex)
{
m_Mutex.LockWrite();
pCtx->mutexLocked = true;
}
pCtx->Begin();
pCtx->Begin(overlappingMoveSupported);
// Defragment.
@ -12015,7 +12021,8 @@ void VmaBlockVector::AddStats(VmaStats* pStats)
VmaDefragmentationAlgorithm_Generic::VmaDefragmentationAlgorithm_Generic(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex) :
uint32_t currentFrameIndex,
bool overlappingMoveSupported) :
VmaDefragmentationAlgorithm(hAllocator, pBlockVector, currentFrameIndex),
m_AllAllocations(false),
m_AllocationCount(0),
@ -12307,8 +12314,10 @@ bool VmaDefragmentationAlgorithm_Generic::MoveMakesSense(
VmaDefragmentationAlgorithm_Fast::VmaDefragmentationAlgorithm_Fast(
VmaAllocator hAllocator,
VmaBlockVector* pBlockVector,
uint32_t currentFrameIndex) :
uint32_t currentFrameIndex,
bool overlappingMoveSupported) :
VmaDefragmentationAlgorithm(hAllocator, pBlockVector, currentFrameIndex),
m_OverlappingMoveSupported(overlappingMoveSupported),
m_AllocationCount(0),
m_AllAllocations(false),
m_BytesMoved(0),
@ -12396,18 +12405,26 @@ VkResult VmaDefragmentationAlgorithm_Fast::Defragment(
// Same block
if(dstBlockInfoIndex == srcBlockInfoIndex)
{
// Destination and source place overlap.
if(dstAllocOffset + srcAllocSize > srcAllocOffset)
VMA_ASSERT(dstAllocOffset <= srcAllocOffset);
const bool overlap = dstAllocOffset + srcAllocSize > srcAllocOffset;
bool skipOver = overlap;
if(overlap && m_OverlappingMoveSupported && dstAllocOffset < srcAllocOffset)
{
// If destination and source place overlap, skip if it would move it
// by only < 1/64 of its size.
skipOver = (srcAllocOffset - dstAllocOffset) * 64 < srcAllocSize;
}
if(skipOver)
{
// 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;
@ -12604,7 +12621,7 @@ void VmaBlockVectorDefragmentationContext::AddAllocation(VmaAllocation hAlloc, V
m_Allocations.push_back(info);
}
void VmaBlockVectorDefragmentationContext::Begin()
void VmaBlockVectorDefragmentationContext::Begin(bool overlappingMoveSupported)
{
const bool allAllocations = m_AllAllocations ||
m_Allocations.size() == m_pBlockVector->CalcAllocationCount();
@ -12624,12 +12641,12 @@ void VmaBlockVectorDefragmentationContext::Begin()
!m_pBlockVector->IsBufferImageGranularityConflictPossible())
{
m_pAlgorithm = vma_new(m_hAllocator, VmaDefragmentationAlgorithm_Fast)(
m_hAllocator, m_pBlockVector, m_CurrFrameIndex);
m_hAllocator, m_pBlockVector, m_CurrFrameIndex, overlappingMoveSupported);
}
else
{
m_pAlgorithm = vma_new(m_hAllocator, VmaDefragmentationAlgorithm_Generic)(
m_hAllocator, m_pBlockVector, m_CurrFrameIndex);
m_hAllocator, m_pBlockVector, m_CurrFrameIndex, overlappingMoveSupported);
}
if(allAllocations)