Registered Extension Number

498

Revision

2

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2

Contact

Other Extension Metadata

Last Modified Date

2022-10-05

Interactions and External Dependencies
Contributors

  • Kevin Petit, Arm Ltd.

  • Jan-Harald Fredriksen, Arm Ltd.

Description

This extension provides the ability to determine device-specific properties on Arm GPUs. It exposes properties for the number of shader cores, the maximum number of warps that can run on a shader core, and shader builtins to enable invocations to identify which core and warp a shader invocation is executing on.

This extension enables support for the SPIR-V CoreBuiltinsARM capability.

These properties and built-ins can be used for debugging or performance optimisation purposes. A typical optimisation example would be to use CoreIDARM to select a per-shader-core instance of a data structure in algorithms that use atomics so as to reduce contention.

New Structures

New Enum Constants

  • VK_ARM_SHADER_CORE_BUILTINS_EXTENSION_NAME

  • VK_ARM_SHADER_CORE_BUILTINS_SPEC_VERSION

  • Extending VkStructureType:

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CORE_BUILTINS_FEATURES_ARM

    • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CORE_BUILTINS_PROPERTIES_ARM

New or Modified Built-In Variables

New SPIR-V Capabilities

Issues

None.

Version History

  • Revision 1, 2022-10-05 (Kevin Petit)

    • Initial revision

  • Revision 2, 2022-10-26 (Kevin Petit)

    • Add shaderCoreMask property

See Also

VkPhysicalDeviceShaderCoreBuiltinsFeaturesARM, VkPhysicalDeviceShaderCoreBuiltinsPropertiesARM

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 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0