VK_NV_low_latency(3)

# VK_NV_low_latency(3) Manual Page

## Name

VK_NV_low_latency - device extension

## Registered Extension Number

311

## Revision

2

## Ratification Status

Not ratified

## Extension and Version Dependencies

None

## Deprecation State

- Deprecated by VK_NV_low_latency2 extension

## Contact

- Charles Hansen [GitHub]cshansen

## Other Extension Metadata

Last Modified Date

  2026-06-26

Contributors

  - Charles Hansen, NVIDIA

  - Will Campbell, NVIDIA

## Description

This extension adds the VkQueryLowLatencySupportNV structure, a structure used to query support for NVIDIA Reflex.

Revision 2 adds entry points exposing the legacy NVIDIA Reflex implementation. These are only intended for use by compatibility layers, applications should not call these methods directly.

Note | There is currently no specification language written for this extension. The links to APIs defined by the extension are to stubs that only include generated content such as API declarations and implicit valid usage statements.

## New Commands

- vkGetLatencyTimingsLegacyNV

- vkGetSleepStatusLegacyNV

- vkLatencySleepLegacyNV

- vkQueueNotifyOutOfBandLegacyNV

- vkSetLatencyMarkerLegacyNV

- vkSetLatencySleepModeLegacyNV

- vkShutdownLatencyDeviceLegacyNV

## New Structures

- Extending VkSemaphoreCreateInfo:

  - VkQueryLowLatencySupportNV

## New Enum Constants

- `VK_NV_LOW_LATENCY_EXTENSION_NAME`

- `VK_NV_LOW_LATENCY_SPEC_VERSION`

- Extending VkStructureType:

  - VK_STRUCTURE_TYPE_QUERY_LOW_LATENCY_SUPPORT_NV

## Issues

1) Why does `VkQueryLowLatencySupportNV` have output parameters in an input chain?

RESOLVED: We are stuck with this for legacy reasons - we are aware this is bad behavior and this should not be used as a precedent for future extensions.

## Version History

- Revision 1, 2023-02-10 (Charles Hansen)

  - Internal revisions

- Revision 2, 2026-06-26 (Will Campbell)

  - Added LegacyNV entry points

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification.

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0