C Specification
If the VkPhysicalDeviceMemoryBudgetPropertiesEXT structure is included
in the pNext chain of VkPhysicalDeviceMemoryProperties2, it is
filled with the current memory budgets and usages.
The VkPhysicalDeviceMemoryBudgetPropertiesEXT structure is defined as:
typedef struct VkPhysicalDeviceMemoryBudgetPropertiesEXT {
VkStructureType sType;
void* pNext;
VkDeviceSize heapBudget[VK_MAX_MEMORY_HEAPS];
VkDeviceSize heapUsage[VK_MAX_MEMORY_HEAPS];
} VkPhysicalDeviceMemoryBudgetPropertiesEXT;
Members
-
sTypeis the type of this structure. -
pNextisNULLor a pointer to an extension-specific structure. -
heapBudgetis an array ofVK_MAX_MEMORY_HEAPSVkDeviceSizevalues in which memory budgets are returned, with one element for each memory heap. A heap’s budget is a rough estimate of how much memory the process can allocate from that heap before allocations may fail or cause performance degradation. The budget includes any currently allocated device memory. -
heapUsageis an array ofVK_MAX_MEMORY_HEAPSVkDeviceSizevalues in which memory usages are returned, with one element for each memory heap. A heap’s usage is an estimate of how much memory the process is currently using in that heap.
Description
The values returned in this structure are not invariant.
The heapBudget and heapUsage values must be zero for array
elements greater than or equal to
VkPhysicalDeviceMemoryProperties::memoryHeapCount.
The heapBudget value must be non-zero for array elements less than
VkPhysicalDeviceMemoryProperties::memoryHeapCount.
The heapBudget value must be less than or equal to
VkMemoryHeap::size for each heap.
See Also
VkDeviceSize, VkStructureType
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.