Class AMDBufferMarker


  • public class AMDBufferMarker
    extends java.lang.Object
    This extension adds a new operation to execute pipelined writes of small marker values into a VkBuffer object.

    The primary purpose of these markers is to facilitate the development of debugging tools for tracking which pipelined command contributed to device loss.

    Examples

    None.

    Name String
    VK_AMD_buffer_marker
    Extension Type
    Device extension
    Registered Extension Number
    180
    Revision
    1
    Extension and Version Dependencies
    • Requires Vulkan 1.0
    Contact
    Last Modified Date
    2018-01-26
    IP Status
    No known IP claims.
    Contributors
    • Matthaeus G. Chajdas, AMD
    • Jaakko Konttinen, AMD
    • Daniel Rakos, AMD
    • Field Detail

      • VK_AMD_BUFFER_MARKER_SPEC_VERSION

        public static final int VK_AMD_BUFFER_MARKER_SPEC_VERSION
        The extension specification version.
        See Also:
        Constant Field Values
      • VK_AMD_BUFFER_MARKER_EXTENSION_NAME

        public static final java.lang.String VK_AMD_BUFFER_MARKER_EXTENSION_NAME
        The extension name.
        See Also:
        Constant Field Values
    • Method Detail

      • vkCmdWriteBufferMarkerAMD

        public static void vkCmdWriteBufferMarkerAMD​(VkCommandBuffer commandBuffer,
                                                     int pipelineStage,
                                                     long dstBuffer,
                                                     long dstOffset,
                                                     int marker)
        Execute a pipelined write of a marker value into a buffer.
        C Specification

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

        
         void vkCmdWriteBufferMarkerAMD(
             VkCommandBuffer                             commandBuffer,
             VkPipelineStageFlagBits                     pipelineStage,
             VkBuffer                                    dstBuffer,
             VkDeviceSize                                dstOffset,
             uint32_t                                    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 ACCESS_TRANSFER_WRITE_BIT, and the pipeline stages for identifying the synchronization scope must include both pipelineStage and PIPELINE_STAGE_TRANSFER_BIT.

        Note

        Similar to CmdWriteTimestamp, 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
        • dstOffset must be less than or equal to the size of dstBuffer minus 4.
        • dstBuffer must have been created with BUFFER_USAGE_TRANSFER_DST_BIT usage flag
        • If dstBuffer is non-sparse then it must be bound completely and contiguously to a single VkDeviceMemory object
        • dstOffset must be a multiple of 4
        Valid Usage (Implicit)
        • commandBuffer must be a valid VkCommandBuffer handle
        • pipelineStage must be a valid VkPipelineStageFlagBits value
        • dstBuffer must be a valid VkBuffer handle
        • commandBuffer must be in the recording state
        • The VkCommandPool that commandBuffer was allocated from must support transfer, graphics, or compute operations
        • 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 LevelsRender Pass ScopeSupported Queue TypesPipeline Type
        Primary SecondaryBothTransfer Graphics ComputeTransfer
        Parameters:
        commandBuffer - the command buffer into which the command will be recorded.
        pipelineStage - one of the VkPipelineStageFlagBits values, specifying the pipeline stage whose completion triggers the marker write.
        dstBuffer - the buffer where the marker will be written to.
        dstOffset - the byte offset into the buffer where the marker will be written to.
        marker - the 32-bit value of the marker.