Name

VK_KHR_shader_clock - device extension

VK_KHR_shader_clock

Name String

VK_KHR_shader_clock

Extension Type

Device extension

Registered Extension Number

182

Revision

1

Ratification Status

Ratified

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2 or Version 1.1

Contact

• Aaron Hagan @ahagan%0A*Here describe the issue or question you have about the VK_KHR_shader_clock extension*

Other Extension Metadata

Last Modified Date

2019-4-25

IP Status

No known IP claims.

Interactions and External Dependencies

• This extension requires SPV_KHR_shader_clock.
• This extension provides API support for ARB_shader_clock and EXT_shader_realtime_clock

Contributors

• Aaron Hagan, AMD
• Daniel Koch, NVIDIA

Description

This extension advertises the SPIR-V ShaderClockKHR capability for Vulkan, which allows a shader to query a real-time or monotonically incrementing counter at the subgroup level or across the device level. The two valid SPIR-V scopes for OpReadClockKHR are Subgroup and Device.

When using GLSL source-based shading languages, the clockRealtime*EXT() timing functions map to the OpReadClockKHR instruction with a scope of Device, and the clock*ARB() timing functions map to the OpReadClockKHR instruction with a scope of Subgroup.

New Structures

• Extending PhysicalDeviceFeatures2, DeviceCreateInfo:

  • PhysicalDeviceShaderClockFeaturesKHR

New Enum Constants

• KHR_SHADER_CLOCK_EXTENSION_NAME

• KHR_SHADER_CLOCK_SPEC_VERSION

• Extending StructureType:

  • STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CLOCK_FEATURES_KHR

New SPIR-V Capabilities

• ShaderClockKHR

Version History

• Revision 1, 2019-4-25 (Aaron Hagan)

  • Initial revision

See Also

PhysicalDeviceShaderClockFeaturesKHR

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.