# vkSetDeviceMemoryPriorityEXT(3) Manual Page

## Name

vkSetDeviceMemoryPriorityEXT - Change a memory allocation priority

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## C Specification

To modify the priority of an existing memory allocation, call:

    // Provided by VK_EXT_pageable_device_local_memory
    void vkSetDeviceMemoryPriorityEXT(
        VkDevice                                    device,
        VkDeviceMemory                              memory,
        float                                       priority);

## Parameters

- `device` is the logical device that owns the memory.

- `memory` is the VkDeviceMemory object to which the new priority will be applied.

- `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.

## Description

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

Valid Usage

- VUID-vkSetDeviceMemoryPriorityEXT-priority-06258
  `priority` must be between `0` and `1`, inclusive

Valid Usage (Implicit)

- VUID-vkSetDeviceMemoryPriorityEXT-device-parameter
  `device` must be a valid VkDevice handle

- VUID-vkSetDeviceMemoryPriorityEXT-memory-parameter
  `memory` must be a valid VkDeviceMemory handle

- VUID-vkSetDeviceMemoryPriorityEXT-memory-parent
  `memory` must have been created, allocated, or retrieved from `device`

## See Also

VK_EXT_pageable_device_local_memory, VkDevice, VkDeviceMemory

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0