C Specification

To dynamically set the stack size for a ray tracing pipeline, call:

// Provided by VK_KHR_ray_tracing_pipeline
void vkCmdSetRayTracingPipelineStackSizeKHR(
    VkCommandBuffer                             commandBuffer,
    uint32_t                                    pipelineStackSize);


  • commandBuffer is the command buffer into which the command will be recorded.

  • pipelineStackSize is the stack size to use for subsequent ray tracing trace commands.


This command sets the stack size for subsequent ray tracing commands when the ray tracing pipeline is created with VK_DYNAMIC_STATE_RAY_TRACING_PIPELINE_STACK_SIZE_KHR set in VkPipelineDynamicStateCreateInfo::pDynamicStates. Otherwise, the stack size is computed as described in Ray Tracing Pipeline Stack.

Valid Usage
  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-pipelineStackSize-03610
    pipelineStackSize must be large enough for any dynamic execution through the shaders in the ray tracing pipeline used by a subsequent trace call

Valid Usage (Implicit)
  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-commandBuffer-parameter
    commandBuffer must be a valid VkCommandBuffer handle

  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-commandBuffer-recording
    commandBuffer must be in the recording state

  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-commandBuffer-cmdpool
    The VkCommandPool that commandBuffer was allocated from must support compute operations

  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-renderpass
    This command must only be called outside of a render pass instance

  • VUID-vkCmdSetRayTracingPipelineStackSizeKHR-videocoding
    This command must only be called outside of a video coding scope

Host Synchronization
  • Host access to commandBuffer must be externally synchronized

  • Host access to the VkCommandPool that commandBuffer was allocated from must be externally synchronized

Command Properties
Command Buffer Levels Render Pass Scope Video Coding Scope Supported Queue Types Command Type






See Also

Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0