C Specification

If the pNext chain includes a VkMemoryPriorityAllocateInfoEXT structure, then that structure includes a priority for the memory.

The VkMemoryPriorityAllocateInfoEXT structure is defined as:

// Provided by VK_EXT_memory_priority
typedef struct VkMemoryPriorityAllocateInfoEXT {
    VkStructureType    sType;
    const void*        pNext;
    float              priority;
} VkMemoryPriorityAllocateInfoEXT;


  • sType is a VkStructureType value identifying this structure.

  • pNext is NULL or a pointer to a structure extending this structure.

  • priority is a floating-point value between 0 and 1, indicating the priority of the allocation relative to other memory allocations. Larger values are higher priority. The granularity of the priorities is implementation-dependent.


Memory allocations with higher priority may be more likely to stay in device-local memory when the system is under memory pressure.

If this structure is not included, it is as if the priority value were 0.5.

Valid Usage
  • VUID-VkMemoryPriorityAllocateInfoEXT-priority-02602
    priority must be between 0 and 1, inclusive

Valid Usage (Implicit)
  • VUID-VkMemoryPriorityAllocateInfoEXT-sType-sType

See Also

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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0