# vkLatencySleepNV(3) Manual Page

## Name

vkLatencySleepNV - Trigger low latency mode Sleep

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## C Specification

To provide the synchronization primitive used to delay host CPU work for lower latency rendering, call:

    // Provided by VK_NV_low_latency2
    VkResult vkLatencySleepNV(
        VkDevice                                    device,
        VkSwapchainKHR                              swapchain,
        const VkLatencySleepInfoNV*                 pSleepInfo);

## Parameters

- `device` is the device associated with `swapchain`.

- `swapchain` is the swapchain to delay associated CPU work based on VkLatencySubmissionPresentIdNV submissions.

- `pSleepInfo` is a pointer to a VkLatencySleepInfoNV structure specifying the parameters of the latency sleep.

## Description

`vkLatencySleepNV` returns immediately. Applications should use vkWaitSemaphores with `pSleepInfo->signalSemaphore` to delay host CPU work. CPU work refers to application work done before presenting which includes but is not limited to: input sampling, simulation, command buffer recording, command buffer submission, and present submission. Applications should call this function before input sampling, and exactly once between presents.

Valid Usage (Implicit)

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

- VUID-vkLatencySleepNV-swapchain-parameter
  `swapchain` must be a valid VkSwapchainKHR handle

- VUID-vkLatencySleepNV-pSleepInfo-parameter
  `pSleepInfo` must be a valid pointer to a valid VkLatencySleepInfoNV structure

- VUID-vkLatencySleepNV-swapchain-parent
  `swapchain` must have been created, allocated, or retrieved from `device`

Return Codes

On success, this command returns

  - `VK_SUCCESS`

This command does not return any failure codes

## See Also

VK_NV_low_latency2, VkDevice, VkLatencySleepInfoNV, VkSwapchainKHR

## 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