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https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git
synced 2024-11-10 10:41:52 +00:00
VmaBlockMetadata_Buddy: Introduced m_LevelCount to limit number of levels in use by particular memory block, considering new constant MIN_NODE_SIZE.
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@ -4160,6 +4160,13 @@ static void BasicTestBuddyAllocator()
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&newBufInfo.Buffer, &newBufInfo.Allocation, &allocInfo);
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assert(res == VK_SUCCESS);
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bufInfo.push_back(newBufInfo);
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// Test very small allocation, smaller than minimum node size.
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bufCreateInfo.size = 1;
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res = vmaCreateBuffer(g_hAllocator, &bufCreateInfo, &allocCreateInfo,
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&newBufInfo.Buffer, &newBufInfo.Allocation, &allocInfo);
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assert(res == VK_SUCCESS);
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bufInfo.push_back(newBufInfo);
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VmaPoolStats stats = {};
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vmaGetPoolStats(g_hAllocator, pool, &stats);
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@ -4971,9 +4971,11 @@ private:
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- m_UsableSize is this size aligned down to a power of two.
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All allocations and calculations happen relative to m_UsableSize.
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- GetUnusableSize() is the difference between them.
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It is repoted as separate unused range.
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It is repoted as separate, unused range, not available for allocations.
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Level 0 has block size = GetSize(). Level 1 has block size = GetSize() / 2 and so on...
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Node at level 0 has size = m_UsableSize.
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Each next level contains nodes with size 2 times smaller than current level.
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m_LevelCount is the maximum number of levels to use in the current object.
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*/
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class VmaBlockMetadata_Buddy : public VmaBlockMetadata
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{
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@ -5028,7 +5030,8 @@ public:
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virtual void FreeAtOffset(VkDeviceSize offset) { FreeAtOffset(VMA_NULL, offset); }
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private:
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static const size_t MAX_LEVELS = 30; // TODO
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static const VkDeviceSize MIN_NODE_SIZE = 32;
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static const size_t MAX_LEVELS = 30;
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struct ValidationContext
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{
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@ -5075,6 +5078,8 @@ private:
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// Size of the memory block aligned down to a power of two.
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VkDeviceSize m_UsableSize;
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uint32_t m_LevelCount;
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Node* m_Root;
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struct {
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Node* front;
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@ -9230,6 +9235,14 @@ void VmaBlockMetadata_Buddy::Init(VkDeviceSize size)
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m_UsableSize = VmaPrevPow2(size);
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m_SumFreeSize = m_UsableSize;
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// Calculate m_LevelCount.
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m_LevelCount = 1;
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while(m_LevelCount < MAX_LEVELS &&
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LevelToNodeSize(m_LevelCount) >= MIN_NODE_SIZE)
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{
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++m_LevelCount;
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}
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Node* rootNode = new Node();
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rootNode->offset = 0;
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rootNode->type = Node::TYPE_FREE;
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@ -9252,7 +9265,7 @@ bool VmaBlockMetadata_Buddy::Validate() const
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VMA_VALIDATE(m_SumFreeSize == ctx.calculatedSumFreeSize);
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// Validate free node lists.
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for(uint32_t level = 0; level < MAX_LEVELS; ++level)
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for(uint32_t level = 0; level < m_LevelCount; ++level)
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{
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VMA_VALIDATE(m_FreeList[level].front == VMA_NULL ||
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m_FreeList[level].front->free.prev == VMA_NULL);
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@ -9274,12 +9287,18 @@ bool VmaBlockMetadata_Buddy::Validate() const
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}
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}
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// Validate that free lists ar higher levels are empty.
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for(uint32_t level = m_LevelCount; level < MAX_LEVELS; ++level)
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{
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VMA_VALIDATE(m_FreeList[level].front == VMA_NULL && m_FreeList[level].back == VMA_NULL);
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}
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return true;
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}
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VkDeviceSize VmaBlockMetadata_Buddy::GetUnusedRangeSizeMax() const
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{
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for(uint32_t level = 0; level < MAX_LEVELS; ++level)
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for(uint32_t level = 0; level < m_LevelCount; ++level)
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{
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if(m_FreeList[level].front != VMA_NULL)
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{
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@ -9493,6 +9512,7 @@ void VmaBlockMetadata_Buddy::DeleteNode(Node* node)
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bool VmaBlockMetadata_Buddy::ValidateNode(ValidationContext& ctx, const Node* parent, const Node* curr, uint32_t level, VkDeviceSize levelNodeSize) const
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{
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VMA_VALIDATE(level < m_LevelCount);
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VMA_VALIDATE(curr->parent == parent);
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VMA_VALIDATE((curr->buddy == VMA_NULL) == (parent == VMA_NULL));
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VMA_VALIDATE(curr->buddy == VMA_NULL || curr->buddy->buddy == curr);
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@ -9540,7 +9560,7 @@ uint32_t VmaBlockMetadata_Buddy::AllocSizeToLevel(VkDeviceSize allocSize) const
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uint32_t level = 0;
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VkDeviceSize currLevelNodeSize = m_UsableSize;
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VkDeviceSize nextLevelNodeSize = currLevelNodeSize >> 1;
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while(allocSize <= nextLevelNodeSize && level + 1 < MAX_LEVELS)
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while(allocSize <= nextLevelNodeSize && level + 1 < m_LevelCount)
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{
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++level;
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currLevelNodeSize = nextLevelNodeSize;
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