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.