Internal improvement: Added counting total number of VkDeviceMemory blocks.
Fixed case of spamming dedicated allocations instead of bigger blocks and thus and exceeding maxMemoryAllocationCount when heap size/budget is reached or exceeded.
Added debug macro VMA_DEBUG_DONT_EXCEED_MAX_MEMORY_ALLOCATION_COUNT.
diff --git a/src/vk_mem_alloc.h b/src/vk_mem_alloc.h
index c61e80c..be21d44 100644
--- a/src/vk_mem_alloc.h
+++ b/src/vk_mem_alloc.h
@@ -4409,6 +4409,14 @@
#define VMA_DEBUG_MIN_BUFFER_IMAGE_GRANULARITY (1)
#endif
+#ifndef VMA_DEBUG_DONT_EXCEED_MAX_MEMORY_ALLOCATION_COUNT
+ /*
+ Set this to 1 to make VMA never exceed VkPhysicalDeviceLimits::maxMemoryAllocationCount
+ and return error instead of leaving up to Vulkan implementation what to do in such cases.
+ */
+ #define VMA_DEBUG_DONT_EXCEED_MAX_MEMORY_ALLOCATION_COUNT (0)
+#endif
+
#ifndef VMA_SMALL_HEAP_MAX_SIZE
/// Maximum size of a memory heap in Vulkan to consider it "small".
#define VMA_SMALL_HEAP_MAX_SIZE (1024ull * 1024 * 1024)
@@ -7919,6 +7927,7 @@
VMA_RW_MUTEX m_DedicatedAllocationsMutex[VK_MAX_MEMORY_TYPES];
VmaCurrentBudgetData m_Budget;
+ VMA_ATOMIC_UINT32 m_DeviceMemoryCount; // Total number of VkDeviceMemory objects.
VmaAllocator_T(const VmaAllocatorCreateInfo* pCreateInfo);
VkResult Init(const VmaAllocatorCreateInfo* pCreateInfo);
@@ -15729,6 +15738,7 @@
*pCreateInfo->pAllocationCallbacks : VmaEmptyAllocationCallbacks),
m_AllocationObjectAllocator(&m_AllocationCallbacks),
m_HeapSizeLimitMask(0),
+ m_DeviceMemoryCount(0),
m_PreferredLargeHeapBlockSize(0),
m_PhysicalDevice(pCreateInfo->physicalDevice),
m_CurrentFrameIndex(0),
@@ -16244,34 +16254,40 @@
{
return VK_ERROR_OUT_OF_DEVICE_MEMORY;
}
+
+ // Protection against creating each allocation as dedicated when we reach or exceed heap size/budget,
+ // which can quickly deplete maxMemoryAllocationCount: Don't try dedicated allocations when above
+ // 3/4 of the maximum allocation count.
+ if(m_DeviceMemoryCount.load() > m_PhysicalDeviceProperties.limits.maxMemoryAllocationCount * 3 / 4)
+ {
+ return VK_ERROR_OUT_OF_DEVICE_MEMORY;
+ }
+
+ res = AllocateDedicatedMemory(
+ size,
+ suballocType,
+ memTypeIndex,
+ (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_WITHIN_BUDGET_BIT) != 0,
+ (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_MAPPED_BIT) != 0,
+ (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT) != 0,
+ finalCreateInfo.pUserData,
+ finalCreateInfo.priority,
+ dedicatedBuffer,
+ dedicatedBufferUsage,
+ dedicatedImage,
+ allocationCount,
+ pAllocations);
+ if(res == VK_SUCCESS)
+ {
+ // Succeeded: AllocateDedicatedMemory function already filld pMemory, nothing more to do here.
+ VMA_DEBUG_LOG(" Allocated as DedicatedMemory");
+ return VK_SUCCESS;
+ }
else
{
- res = AllocateDedicatedMemory(
- size,
- suballocType,
- memTypeIndex,
- (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_WITHIN_BUDGET_BIT) != 0,
- (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_MAPPED_BIT) != 0,
- (finalCreateInfo.flags & VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT) != 0,
- finalCreateInfo.pUserData,
- finalCreateInfo.priority,
- dedicatedBuffer,
- dedicatedBufferUsage,
- dedicatedImage,
- allocationCount,
- pAllocations);
- if(res == VK_SUCCESS)
- {
- // Succeeded: AllocateDedicatedMemory function already filld pMemory, nothing more to do here.
- VMA_DEBUG_LOG(" Allocated as DedicatedMemory");
- return VK_SUCCESS;
- }
- else
- {
- // Everything failed: Return error code.
- VMA_DEBUG_LOG(" vkAllocateMemory FAILED");
- return res;
- }
+ // Everything failed: Return error code.
+ VMA_DEBUG_LOG(" vkAllocateMemory FAILED");
+ return res;
}
}
}
@@ -17177,8 +17193,41 @@
(*pAllocation)->InitLost();
}
+// An object that increments given atomic but decrements it back in the destructor unless Commit() is called.
+template<typename AtomicT>
+struct AtomicTransactionalIncrement
+{
+public:
+ ~AtomicTransactionalIncrement()
+ {
+ if(m_Atomic)
+ --(*m_Atomic);
+ }
+ typename AtomicT::value_type Increment(AtomicT* atomic)
+ {
+ m_Atomic = atomic;
+ return m_Atomic->fetch_add(1);
+ }
+ void Commit()
+ {
+ m_Atomic = nullptr;
+ }
+
+private:
+ AtomicT* m_Atomic = nullptr;
+};
+
VkResult VmaAllocator_T::AllocateVulkanMemory(const VkMemoryAllocateInfo* pAllocateInfo, VkDeviceMemory* pMemory)
{
+ AtomicTransactionalIncrement<VMA_ATOMIC_UINT32> deviceMemoryCountIncrement;
+ const uint64_t prevDeviceMemoryCount = deviceMemoryCountIncrement.Increment(&m_DeviceMemoryCount);
+#if VMA_DEBUG_DONT_EXCEED_MAX_MEMORY_ALLOCATION_COUNT
+ if(prevDeviceMemoryCount >= m_PhysicalDeviceProperties.limits.maxMemoryAllocationCount)
+ {
+ return VK_ERROR_TOO_MANY_OBJECTS;
+ }
+#endif
+
const uint32_t heapIndex = MemoryTypeIndexToHeapIndex(pAllocateInfo->memoryTypeIndex);
// HeapSizeLimit is in effect for this heap.
@@ -17218,6 +17267,8 @@
{
(*m_DeviceMemoryCallbacks.pfnAllocate)(this, pAllocateInfo->memoryTypeIndex, *pMemory, pAllocateInfo->allocationSize, m_DeviceMemoryCallbacks.pUserData);
}
+
+ deviceMemoryCountIncrement.Commit();
}
else
{
@@ -17239,6 +17290,8 @@
(*m_VulkanFunctions.vkFreeMemory)(m_hDevice, hMemory, GetAllocationCallbacks());
m_Budget.m_BlockBytes[MemoryTypeIndexToHeapIndex(memoryType)] -= size;
+
+ --m_DeviceMemoryCount;
}
VkResult VmaAllocator_T::BindVulkanBuffer(
