## C Specification

To write a 32-bit marker value into a buffer as a pipelined operation, call:

// Provided by VK_AMD_buffer_marker
void vkCmdWriteBufferMarkerAMD(
VkCommandBuffer                             commandBuffer,
VkPipelineStageFlagBits                     pipelineStage,
VkBuffer                                    dstBuffer,
VkDeviceSize                                dstOffset,
uint32_t                                    marker);

## Parameters

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

• pipelineStage is a VkPipelineStageFlagBits value specifying the pipeline stage whose completion triggers the marker write.

• dstBuffer is the buffer where the marker will be written to.

• dstOffset is the byte offset into the buffer where the marker will be written to.

• marker is the 32-bit value of the marker.

## Description

The command will write the 32-bit marker value into the buffer only after all preceding commands have finished executing up to at least the specified pipeline stage. This includes the completion of other preceding vkCmdWriteBufferMarkerAMD commands so long as their specified pipeline stages occur either at the same time or earlier than this command’s specified pipelineStage.

While consecutive buffer marker writes with the same pipelineStage parameter are implicitly complete in submission order, memory and execution dependencies between buffer marker writes and other operations must still be explicitly ordered using synchronization commands. The access scope for buffer marker writes falls under the VK_ACCESS_TRANSFER_WRITE_BIT, and the pipeline stages for identifying the synchronization scope must include both pipelineStage and VK_PIPELINE_STAGE_TRANSFER_BIT.

 Note Similar to vkCmdWriteTimestamp, if an implementation is unable to write a marker at any specific pipeline stage, it may instead do so at any logically later stage.
 Note Implementations may only support a limited number of pipelined marker write operations in flight at a given time, thus excessive number of marker write operations may degrade command execution performance.
Valid Usage
• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04074
pipelineStage must be a valid stage for the queue family that was used to create the command pool that commandBuffer was allocated from

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04075
If the geometryShader feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04076
If the tessellationShader feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04077
If the conditionalRendering feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_CONDITIONAL_RENDERING_BIT_EXT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04078
If the fragmentDensityMap feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_FRAGMENT_DENSITY_PROCESS_BIT_EXT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04079
If the transformFeedback feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_TRANSFORM_FEEDBACK_BIT_EXT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-04080
If the meshShader feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_MESH_SHADER_BIT_EXT

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-07077
If the task shaders feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_TASK_SHADER_BIT_EXT

If neither the shadingRateImage or attachmentFragmentShadingRate are enabled, pipelineStage must not be VK_PIPELINE_STAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR

• VUID-vkCmdWriteBufferMarkerAMD-synchronization2-06489
If the synchronization2 feature is not enabled, pipelineStage must not be VK_PIPELINE_STAGE_NONE

• VUID-vkCmdWriteBufferMarkerAMD-dstOffset-01798
dstOffset must be less than or equal to the size of dstBuffer minus 4

• VUID-vkCmdWriteBufferMarkerAMD-dstBuffer-01799
dstBuffer must have been created with VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag

• VUID-vkCmdWriteBufferMarkerAMD-dstBuffer-01800
If dstBuffer is non-sparse then it must be bound completely and contiguously to a single VkDeviceMemory object

• VUID-vkCmdWriteBufferMarkerAMD-dstOffset-01801
dstOffset must be a multiple of 4

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

• VUID-vkCmdWriteBufferMarkerAMD-pipelineStage-parameter
If pipelineStage is not 0, pipelineStage must be a valid VkPipelineStageFlagBits value

• VUID-vkCmdWriteBufferMarkerAMD-dstBuffer-parameter
dstBuffer must be a valid VkBuffer handle

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

• VUID-vkCmdWriteBufferMarkerAMD-commandBuffer-cmdpool
The VkCommandPool that commandBuffer was allocated from must support transfer, graphics, or compute operations

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

• VUID-vkCmdWriteBufferMarkerAMD-commonparent
Both of commandBuffer, and dstBuffer must have been created, allocated, or retrieved from the same VkDevice

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

Primary
Secondary

Both

Outside

Transfer
Graphics
Compute

Action