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Optimized VmaBlockVector::Allocate for certain cases.

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This commit is contained in:
Adam Sawicki 2018-08-23 10:52:07 +02:00
parent 0dec444a58
commit 1f6c388348
1 changed files with 157 additions and 152 deletions
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39
src/vk_mem_alloc.h
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@ -9169,9 +9169,16 @@ VkResult VmaBlockVector::Allocate(
VmaSuballocationType suballocType,
VmaAllocation* pAllocation)
{
const bool isUpperAddress = (createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0;
const bool canMakeOtherLost = (createInfo.flags & VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT) != 0;
const bool mapped = (createInfo.flags & VMA_ALLOCATION_CREATE_MAPPED_BIT) != 0;
const bool isUserDataString = (createInfo.flags & VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT) != 0;
const bool canCreateNewBlock =
((createInfo.flags & VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT) == 0) &&
(m_Blocks.size() < m_MaxBlockCount);
// Upper address can only be used with linear allocator.
if((createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0 &&
!m_LinearAlgorithm)
if(isUpperAddress && !m_LinearAlgorithm)
{
return VK_ERROR_FEATURE_NOT_PRESENT;
}
@ -9182,12 +9189,15 @@ VkResult VmaBlockVector::Allocate(
return VK_ERROR_OUT_OF_DEVICE_MEMORY;
}
const bool mapped = (createInfo.flags & VMA_ALLOCATION_CREATE_MAPPED_BIT) != 0;
const bool isUserDataString = (createInfo.flags & VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT) != 0;
const bool upperAddress = (createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0;
VmaMutexLock lock(m_Mutex, m_hAllocator->m_UseMutex);
/*
Under certain condition, this whole section can be skipped for optimization, so
we move on directly to trying to allocate with canMakeOtherLost. That's the case
e.g. for custom pools with linear algorithm.
*/
if(!canMakeOtherLost || canCreateNewBlock)
{
// 1. Search existing allocations. Try to allocate without making other allocations lost.
// Forward order in m_Blocks - prefer blocks with smallest amount of free space.
for(size_t blockIndex = 0; blockIndex < m_Blocks.size(); ++blockIndex )
@ -9201,7 +9211,7 @@ VkResult VmaBlockVector::Allocate(
m_BufferImageGranularity,
size,
alignment,
upperAddress,
isUpperAddress,
suballocType,
false, // canMakeOtherLost
&currRequest))
@ -9225,7 +9235,7 @@ VkResult VmaBlockVector::Allocate(
}
*pAllocation = vma_new(m_hAllocator, VmaAllocation_T)(currentFrameIndex, isUserDataString);
pCurrBlock->m_pMetadata->Alloc(currRequest, suballocType, size, upperAddress, *pAllocation);
pCurrBlock->m_pMetadata->Alloc(currRequest, suballocType, size, isUpperAddress, *pAllocation);
(*pAllocation)->InitBlockAllocation(
hCurrentPool,
pCurrBlock,
@ -9251,10 +9261,6 @@ VkResult VmaBlockVector::Allocate(
}
}
const bool canCreateNewBlock =
((createInfo.flags & VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT) == 0) &&
(m_Blocks.size() < m_MaxBlockCount);
// 2. Try to create new block.
if(canCreateNewBlock)
{
@ -9327,13 +9333,13 @@ VkResult VmaBlockVector::Allocate(
m_BufferImageGranularity,
size,
alignment,
upperAddress,
isUpperAddress,
suballocType,
false, // canMakeOtherLost
&allocRequest))
{
*pAllocation = vma_new(m_hAllocator, VmaAllocation_T)(currentFrameIndex, isUserDataString);
pBlock->m_pMetadata->Alloc(allocRequest, suballocType, size, upperAddress, *pAllocation);
pBlock->m_pMetadata->Alloc(allocRequest, suballocType, size, isUpperAddress, *pAllocation);
(*pAllocation)->InitBlockAllocation(
hCurrentPool,
pBlock,
@ -9364,8 +9370,7 @@ VkResult VmaBlockVector::Allocate(
}
}
}
const bool canMakeOtherLost = (createInfo.flags & VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT) != 0;
}
// 3. Try to allocate from existing blocks with making other allocations lost.
if(canMakeOtherLost)
@ -9434,7 +9439,7 @@ VkResult VmaBlockVector::Allocate(
}
// Allocate from this pBlock.
*pAllocation = vma_new(m_hAllocator, VmaAllocation_T)(currentFrameIndex, isUserDataString);
pBestRequestBlock->m_pMetadata->Alloc(bestRequest, suballocType, size, upperAddress, *pAllocation);
pBestRequestBlock->m_pMetadata->Alloc(bestRequest, suballocType, size, isUpperAddress, *pAllocation);
(*pAllocation)->InitBlockAllocation(
hCurrentPool,
pBestRequestBlock,