mirror of
https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
synced 2024-11-05 12:20:07 +00:00
Added VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT, WORST_FIT, FIRST_FIT, and aliases: VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT, MIN_TIME, MIN_FRAGMENTATION.
Deleted VMA_BEST_FIT macro.
This commit is contained in:
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70a683e53f
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1852036194
@ -1806,6 +1806,29 @@ typedef enum VmaAllocationCreateFlagBits {
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*/
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VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT = 0x00000040,
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/** Allocation strategy that chooses smallest possible free range for the
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allocation.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT = 0x00010000,
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/** Allocation strategy that chooses biggest possible free range for the
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allocation.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT = 0x00020000,
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/** Allocation strategy that chooses first suitable free range for the
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allocation.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT = 0x00040000,
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/** Allocation strategy that tries to minimize memory usage.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT = VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT,
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/** Allocation strategy that tries to minimize allocation time.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT = VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT,
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/** Allocation strategy that tries to minimize memory fragmentation.
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*/
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VMA_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT = VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT,
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VMA_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF
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} VmaAllocationCreateFlagBits;
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typedef VkFlags VmaAllocationCreateFlags;
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@ -2793,22 +2816,6 @@ If providing your own implementation, you need to implement a subset of std::ato
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#define VMA_ATOMIC_UINT32 std::atomic<uint32_t>
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#endif
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#ifndef VMA_BEST_FIT
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/**
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Main parameter for function assessing how good is a free suballocation for a new
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allocation request.
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- Set to 1 to use Best-Fit algorithm - prefer smaller blocks, as close to the
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size of requested allocations as possible.
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- Set to 0 to use Worst-Fit algorithm - prefer larger blocks, as large as
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possible.
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Experiments in special testing environment showed that Best-Fit algorithm is
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better.
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*/
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#define VMA_BEST_FIT (1)
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#endif
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#ifndef VMA_DEBUG_ALWAYS_DEDICATED_MEMORY
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/**
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Every allocation will have its own memory block.
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@ -4536,6 +4543,7 @@ public:
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bool upperAddress,
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VmaSuballocationType allocType,
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bool canMakeOtherLost,
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uint32_t strategy, // Always one of VMA_ALLOCATION_CREATE_STRATEGY_* flags.
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VmaAllocationRequest* pAllocationRequest) = 0;
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virtual bool MakeRequestedAllocationsLost(
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@ -4608,6 +4616,7 @@ public:
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bool upperAddress,
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VmaSuballocationType allocType,
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bool canMakeOtherLost,
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uint32_t strategy,
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VmaAllocationRequest* pAllocationRequest);
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virtual bool MakeRequestedAllocationsLost(
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@ -4776,6 +4785,7 @@ public:
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bool upperAddress,
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VmaSuballocationType allocType,
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bool canMakeOtherLost,
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uint32_t strategy,
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VmaAllocationRequest* pAllocationRequest);
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virtual bool MakeRequestedAllocationsLost(
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@ -5036,6 +5046,7 @@ private:
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VmaAllocationCreateFlags allocFlags,
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void* pUserData,
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VmaSuballocationType suballocType,
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uint32_t strategy,
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VmaAllocation* pAllocation);
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VkResult CreateBlock(VkDeviceSize blockSize, size_t* pNewBlockIndex);
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@ -6576,16 +6587,6 @@ void VmaBlockMetadata_Generic::PrintDetailedMap(class VmaJsonWriter& json) const
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#endif // #if VMA_STATS_STRING_ENABLED
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/*
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How many suitable free suballocations to analyze before choosing best one.
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- Set to 1 to use First-Fit algorithm - first suitable free suballocation will
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be chosen.
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- Set to UINT32_MAX to use Best-Fit/Worst-Fit algorithm - all suitable free
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suballocations will be analized and best one will be chosen.
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- Any other value is also acceptable.
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*/
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//static const uint32_t MAX_SUITABLE_SUBALLOCATIONS_TO_CHECK = 8;
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bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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uint32_t currentFrameIndex,
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uint32_t frameInUseCount,
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@ -6595,6 +6596,7 @@ bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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bool upperAddress,
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VmaSuballocationType allocType,
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bool canMakeOtherLost,
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uint32_t strategy,
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VmaAllocationRequest* pAllocationRequest)
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{
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VMA_ASSERT(allocSize > 0);
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@ -6604,7 +6606,8 @@ bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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VMA_HEAVY_ASSERT(Validate());
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// There is not enough total free space in this block to fullfill the request: Early return.
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if(canMakeOtherLost == false && m_SumFreeSize < allocSize + 2 * VMA_DEBUG_MARGIN)
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if(canMakeOtherLost == false &&
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m_SumFreeSize < allocSize + 2 * VMA_DEBUG_MARGIN)
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{
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return false;
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}
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@ -6613,7 +6616,7 @@ bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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const size_t freeSuballocCount = m_FreeSuballocationsBySize.size();
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if(freeSuballocCount > 0)
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{
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if(VMA_BEST_FIT)
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if(strategy == VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT)
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{
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// Find first free suballocation with size not less than allocSize + 2 * VMA_DEBUG_MARGIN.
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VmaSuballocationList::iterator* const it = VmaBinaryFindFirstNotLess(
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@ -6643,7 +6646,7 @@ bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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}
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}
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}
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else
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else // WORST_FIT, FIRST_FIT
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{
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// Search staring from biggest suballocations.
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for(size_t index = freeSuballocCount; index--; )
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@ -6700,7 +6703,8 @@ bool VmaBlockMetadata_Generic::CreateAllocationRequest(
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{
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tmpAllocRequest.item = suballocIt;
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if(tmpAllocRequest.CalcCost() < pAllocationRequest->CalcCost())
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if(tmpAllocRequest.CalcCost() < pAllocationRequest->CalcCost() ||
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strategy == VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT)
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{
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*pAllocationRequest = tmpAllocRequest;
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}
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@ -8306,6 +8310,7 @@ bool VmaBlockMetadata_Linear::CreateAllocationRequest(
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bool upperAddress,
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VmaSuballocationType allocType,
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bool canMakeOtherLost,
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uint32_t strategy,
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VmaAllocationRequest* pAllocationRequest)
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{
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VMA_ASSERT(allocSize > 0);
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@ -9444,6 +9449,10 @@ VkResult VmaBlockVector::Allocate(
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const bool canCreateNewBlock =
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((createInfo.flags & VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT) == 0) &&
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(m_Blocks.size() < m_MaxBlockCount);
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uint32_t strategy = createInfo.flags & (
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VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT |
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VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT |
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VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT);
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// If linearAlgorithm is used, canMakeOtherLost is available only when used as ring buffer.
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// Which in turn is available only when maxBlockCount = 1.
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@ -9459,6 +9468,20 @@ VkResult VmaBlockVector::Allocate(
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return VK_ERROR_FEATURE_NOT_PRESENT;
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}
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// Validate strategy.
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switch(strategy)
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{
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case 0:
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strategy = VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT;
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break;
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case VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT:
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case VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT:
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case VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT:
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break;
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default:
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return VK_ERROR_FEATURE_NOT_PRESENT;
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}
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// Early reject: requested allocation size is larger that maximum block size for this block vector.
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if(size + 2 * VMA_DEBUG_MARGIN > m_PreferredBlockSize)
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{
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@ -9494,6 +9517,7 @@ VkResult VmaBlockVector::Allocate(
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allocFlagsCopy,
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createInfo.pUserData,
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suballocType,
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strategy,
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pAllocation);
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if(res == VK_SUCCESS)
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{
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@ -9504,25 +9528,54 @@ VkResult VmaBlockVector::Allocate(
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}
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else
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{
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// Forward order in m_Blocks - prefer blocks with smallest amount of free space.
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for(size_t blockIndex = 0; blockIndex < m_Blocks.size(); ++blockIndex )
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if(strategy == VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT)
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{
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VkResult res = AllocateFromBlock(
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pCurrBlock,
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hCurrentPool,
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currentFrameIndex,
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size,
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alignment,
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allocFlagsCopy,
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createInfo.pUserData,
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suballocType,
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pAllocation);
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if(res == VK_SUCCESS)
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// Forward order in m_Blocks - prefer blocks with smallest amount of free space.
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for(size_t blockIndex = 0; blockIndex < m_Blocks.size(); ++blockIndex )
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{
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VMA_DEBUG_LOG(" Returned from existing block #%u", (uint32_t)blockIndex);
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return VK_SUCCESS;
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VkResult res = AllocateFromBlock(
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pCurrBlock,
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hCurrentPool,
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currentFrameIndex,
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size,
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alignment,
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allocFlagsCopy,
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createInfo.pUserData,
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suballocType,
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strategy,
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pAllocation);
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if(res == VK_SUCCESS)
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{
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VMA_DEBUG_LOG(" Returned from existing block #%u", (uint32_t)blockIndex);
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return VK_SUCCESS;
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}
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}
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}
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else // WORST_FIT, FIRST_FIT
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{
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// Backward order in m_Blocks - prefer blocks with largest amount of free space.
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for(size_t blockIndex = m_Blocks.size(); blockIndex--; )
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{
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VkResult res = AllocateFromBlock(
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pCurrBlock,
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hCurrentPool,
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currentFrameIndex,
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size,
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alignment,
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allocFlagsCopy,
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createInfo.pUserData,
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suballocType,
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strategy,
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pAllocation);
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if(res == VK_SUCCESS)
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{
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VMA_DEBUG_LOG(" Returned from existing block #%u", (uint32_t)blockIndex);
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return VK_SUCCESS;
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}
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}
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}
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}
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@ -9589,6 +9642,7 @@ VkResult VmaBlockVector::Allocate(
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allocFlagsCopy,
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createInfo.pUserData,
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suballocType,
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strategy,
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pAllocation);
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if(res == VK_SUCCESS)
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{
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@ -9615,34 +9669,76 @@ VkResult VmaBlockVector::Allocate(
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VkDeviceSize bestRequestCost = VK_WHOLE_SIZE;
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// 1. Search existing allocations.
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// Forward order in m_Blocks - prefer blocks with smallest amount of free space.
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for(size_t blockIndex = 0; blockIndex < m_Blocks.size(); ++blockIndex )
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if(strategy == VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT)
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{
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VmaAllocationRequest currRequest = {};
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if(pCurrBlock->m_pMetadata->CreateAllocationRequest(
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currentFrameIndex,
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m_FrameInUseCount,
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m_BufferImageGranularity,
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size,
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alignment,
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(createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0,
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suballocType,
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canMakeOtherLost,
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&currRequest))
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// Forward order in m_Blocks - prefer blocks with smallest amount of free space.
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for(size_t blockIndex = 0; blockIndex < m_Blocks.size(); ++blockIndex )
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{
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const VkDeviceSize currRequestCost = currRequest.CalcCost();
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if(pBestRequestBlock == VMA_NULL ||
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currRequestCost < bestRequestCost)
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VmaAllocationRequest currRequest = {};
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if(pCurrBlock->m_pMetadata->CreateAllocationRequest(
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currentFrameIndex,
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m_FrameInUseCount,
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m_BufferImageGranularity,
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size,
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alignment,
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(createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0,
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suballocType,
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canMakeOtherLost,
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strategy,
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&currRequest))
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{
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pBestRequestBlock = pCurrBlock;
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bestRequest = currRequest;
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bestRequestCost = currRequestCost;
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if(bestRequestCost == 0)
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const VkDeviceSize currRequestCost = currRequest.CalcCost();
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if(pBestRequestBlock == VMA_NULL ||
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currRequestCost < bestRequestCost)
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{
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break;
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pBestRequestBlock = pCurrBlock;
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bestRequest = currRequest;
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bestRequestCost = currRequestCost;
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if(bestRequestCost == 0)
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{
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break;
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}
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}
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}
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}
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}
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else // WORST_FIT, FIRST_FIT
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{
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// Backward order in m_Blocks - prefer blocks with largest amount of free space.
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for(size_t blockIndex = m_Blocks.size(); blockIndex--; )
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{
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VmaDeviceMemoryBlock* const pCurrBlock = m_Blocks[blockIndex];
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VMA_ASSERT(pCurrBlock);
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VmaAllocationRequest currRequest = {};
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if(pCurrBlock->m_pMetadata->CreateAllocationRequest(
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currentFrameIndex,
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m_FrameInUseCount,
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m_BufferImageGranularity,
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size,
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alignment,
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(createInfo.flags & VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT) != 0,
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suballocType,
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canMakeOtherLost,
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strategy,
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&currRequest))
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{
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const VkDeviceSize currRequestCost = currRequest.CalcCost();
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if(pBestRequestBlock == VMA_NULL ||
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currRequestCost < bestRequestCost ||
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strategy == VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT)
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{
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pBestRequestBlock = pCurrBlock;
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bestRequest = currRequest;
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bestRequestCost = currRequestCost;
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if(bestRequestCost == 0 ||
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strategy == VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT)
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{
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break;
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}
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}
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}
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}
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@ -9835,6 +9931,7 @@ VkResult VmaBlockVector::AllocateFromBlock(
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VmaAllocationCreateFlags allocFlags,
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void* pUserData,
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VmaSuballocationType suballocType,
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uint32_t strategy,
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VmaAllocation* pAllocation)
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{
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VMA_ASSERT((allocFlags & VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT) == 0);
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@ -9852,6 +9949,7 @@ VkResult VmaBlockVector::AllocateFromBlock(
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isUpperAddress,
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suballocType,
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false, // canMakeOtherLost
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strategy,
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&currRequest))
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{
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// Allocate from pCurrBlock.
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@ -10262,6 +10360,7 @@ VkResult VmaDefragmentator::DefragmentRound(
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false, // upperAddress
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suballocType,
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false, // canMakeOtherLost
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VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT,
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&dstAllocRequest) &&
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MoveMakesSense(
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dstBlockIndex, dstAllocRequest.offset, srcBlockIndex, srcOffset))
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