# VK_EXT_calibrated_timestamps(3) Manual Page

## Name

VK_EXT_calibrated_timestamps - device extension

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## Registered Extension Number

185

## Revision

2

## Ratification Status

Not ratified

## Extension and Version Dependencies

VK_KHR_get_physical_device_properties2
or
Vulkan Version 1.1

## Deprecation State

- Promoted to VK_KHR_calibrated_timestamps extension

## Contact

- Daniel Rakos [GitHub]drakos-amd

## Extension Proposal

VK_EXT_calibrated_timestamps

## Other Extension Metadata

Last Modified Date

  2018-10-04

IP Status

  No known IP claims.

Contributors

  - Matthaeus G. Chajdas, AMD

  - Alan Harrison, AMD

  - Derrick Owens, AMD

  - Daniel Rakos, AMD

  - Faith Ekstrand, Intel

  - Keith Packard, Valve

## Description

This extension provides an interface to query calibrated timestamps obtained quasi simultaneously from two time domains.

## Promotion to `VK_KHR_calibrated_timestamps`

All functionality in this extension is included in `VK_KHR_calibrated_timestamps`, with the suffix changed to KHR. The original enum names are still available as aliases of the KHR functionality.

## New Commands

- vkGetCalibratedTimestampsEXT

- vkGetPhysicalDeviceCalibrateableTimeDomainsEXT

## New Structures

- VkCalibratedTimestampInfoEXT

## New Enums

- VkTimeDomainEXT

## New Enum Constants

- `VK_EXT_CALIBRATED_TIMESTAMPS_EXTENSION_NAME`

- `VK_EXT_CALIBRATED_TIMESTAMPS_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_CALIBRATED_TIMESTAMP_INFO_EXT`

- Extending VkTimeDomainKHR:

  - `VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT`

  - `VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT`

  - `VK_TIME_DOMAIN_DEVICE_EXT`

  - `VK_TIME_DOMAIN_QUERY_PERFORMANCE_COUNTER_EXT`

## Version History

- Revision 2, 2021-03-16 (Lionel Landwerlin)

  - Specify requirement on device timestamps

- Revision 1, 2018-10-04 (Daniel Rakos)

  - Internal revisions.

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0