vkGetDeviceQueue2 - Get a queue handle from a device

Parameters

• device is the logical device that owns the queue.

• pQueueInfo is a pointer to a DeviceQueueInfo2 structure, describing the parameters used to create the device queue.
• pQueue is a pointer to a Queue object that will be filled with the handle for the requested queue.

Valid Usage (Implicit)

See Also

Device, DeviceQueueInfo2, Queue

VkProtectedSubmitInfo - Structure indicating whether the submission is protected

Valid Usage

• If the protected memory feature is not enabled, protectedSubmit must not be TRUE

• If protectedSubmit is TRUE, then each element of the pCommandBuffers array must be a protected command buffer
• If protectedSubmit is FALSE, then each element of the pCommandBuffers array must be an unprotected command buffer
• If the SubmitInfo::pNext chain does not include a ProtectedSubmitInfo structure, then each element of the command buffer of the pCommandBuffers array must be an unprotected command buffer

Valid Usage (Implicit)

• sType must be STRUCTURE_TYPE_PROTECTED_SUBMIT_INFO

See Also

Bool32, StructureType

VkPhysicalDeviceProtectedMemoryFeatures - Structure describing protected memory features that can be supported by an implementation

Description

If the PhysicalDeviceProtectedMemoryFeatures structure is included in the pNext chain of PhysicalDeviceFeatures2, it is filled with a value indicating whether the feature is supported.

Valid Usage (Implicit)

See Also

Bool32, StructureType

VkPhysicalDeviceProtectedMemoryProperties - Structure describing protected memory properties that can be supported by an implementation

Description

If the PhysicalDeviceProtectedMemoryProperties structure is included in the pNext chain of PhysicalDeviceProperties2, it is filled with a value indicating the implementation-dependent behavior.

Valid Usage (Implicit)

See Also

Bool32, StructureType

VkDeviceQueueInfo2 - Structure specifying the parameters used for device queue creation

Description

The queue returned by getDeviceQueue2 must have the same flags value from this structure as that used at device creation time in a DeviceQueueCreateInfo instance. If no matching flags were specified at device creation time then pQueue will return NULL_HANDLE.

Valid Usage (Implicit)

See Also

DeviceQueueCreateFlags, StructureType, getDeviceQueue2

VkStructureType - Vulkan structure types (sType)

Description

Each value corresponds to a particular structure with a sType member with a matching name. As a general rule, the name of each StructureType value is obtained by taking the name of the structure, stripping the leading Vk, prefixing each capital letter with _, converting the entire resulting string to upper case, and prefixing it with VK_STRUCTURE_TYPE_. For example, structures of type ImageCreateInfo correspond to a StructureType of STRUCTURE_TYPE_IMAGE_CREATE_INFO, and thus its sType member must equal that when it is passed to the API.

The values STRUCTURE_TYPE_LOADER_INSTANCE_CREATE_INFO and STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO are reserved for internal use by the loader, and do not have corresponding Vulkan structures in this Specification.

See Also

AccelerationStructureBuildGeometryInfoKHR, AccelerationStructureCreateGeometryTypeInfoKHR, AccelerationStructureCreateInfoKHR, AccelerationStructureCreateInfoNV, AccelerationStructureDeviceAddressInfoKHR, AccelerationStructureGeometryAabbsDataKHR, AccelerationStructureGeometryInstancesDataKHR, AccelerationStructureGeometryKHR, AccelerationStructureGeometryTrianglesDataKHR, AccelerationStructureInfoNV, AccelerationStructureMemoryRequirementsInfoKHR, AccelerationStructureMemoryRequirementsInfoNV, AccelerationStructureVersionKHR, AcquireNextImageInfoKHR, AcquireProfilingLockInfoKHR, AndroidHardwareBufferFormatPropertiesANDROID, AndroidHardwareBufferPropertiesANDROID, AndroidHardwareBufferUsageANDROID, AndroidSurfaceCreateInfoKHR, ApplicationInfo, AttachmentDescription2, AttachmentDescriptionStencilLayout, AttachmentReference2, AttachmentReferenceStencilLayout, BaseInStructure, BaseOutStructure, BindAccelerationStructureMemoryInfoKHR, BindBufferMemoryDeviceGroupInfo, BindBufferMemoryInfo, BindImageMemoryDeviceGroupInfo, BindImageMemoryInfo, BindImageMemorySwapchainInfoKHR, BindImagePlaneMemoryInfo, BindSparseInfo, BufferCreateInfo, BufferDeviceAddressCreateInfoEXT, BufferDeviceAddressInfo, BufferMemoryBarrier, BufferMemoryRequirementsInfo2, BufferOpaqueCaptureAddressCreateInfo, BufferViewCreateInfo, CalibratedTimestampInfoEXT, CheckpointDataNV, CommandBufferAllocateInfo, CommandBufferBeginInfo, CommandBufferInheritanceConditionalRenderingInfoEXT, CommandBufferInheritanceInfo, CommandBufferInheritanceRenderPassTransformInfoQCOM, CommandPoolCreateInfo, ComputePipelineCreateInfo, ConditionalRenderingBeginInfoEXT, CooperativeMatrixPropertiesNV, CopyAccelerationStructureInfoKHR, CopyAccelerationStructureToMemoryInfoKHR, CopyDescriptorSet, CopyMemoryToAccelerationStructureInfoKHR, D3D12FenceSubmitInfoKHR, DebugMarkerMarkerInfoEXT, DebugMarkerObjectNameInfoEXT, DebugMarkerObjectTagInfoEXT, DebugReportCallbackCreateInfoEXT, DebugUtilsLabelEXT, DebugUtilsMessengerCallbackDataEXT, DebugUtilsMessengerCreateInfoEXT, DebugUtilsObjectNameInfoEXT, DebugUtilsObjectTagInfoEXT, DedicatedAllocationBufferCreateInfoNV, DedicatedAllocationImageCreateInfoNV, DedicatedAllocationMemoryAllocateInfoNV, DeferredOperationInfoKHR, DescriptorPoolCreateInfo, DescriptorPoolInlineUniformBlockCreateInfoEXT, DescriptorSetAllocateInfo, DescriptorSetLayoutBindingFlagsCreateInfo, DescriptorSetLayoutCreateInfo, DescriptorSetLayoutSupport, DescriptorSetVariableDescriptorCountAllocateInfo, DescriptorSetVariableDescriptorCountLayoutSupport, DescriptorUpdateTemplateCreateInfo, DeviceCreateInfo, DeviceDiagnosticsConfigCreateInfoNV, DeviceEventInfoEXT, DeviceGroupBindSparseInfo, DeviceGroupCommandBufferBeginInfo, DeviceGroupDeviceCreateInfo, DeviceGroupPresentCapabilitiesKHR, DeviceGroupPresentInfoKHR, DeviceGroupRenderPassBeginInfo, DeviceGroupSubmitInfo, DeviceGroupSwapchainCreateInfoKHR, DeviceMemoryOpaqueCaptureAddressInfo, DeviceMemoryOverallocationCreateInfoAMD, DevicePrivateDataCreateInfoEXT, DeviceQueueCreateInfo, DeviceQueueGlobalPriorityCreateInfoEXT, DeviceQueueInfo2, DisplayEventInfoEXT, DisplayModeCreateInfoKHR, DisplayModeProperties2KHR, DisplayNativeHdrSurfaceCapabilitiesAMD, DisplayPlaneCapabilities2KHR, DisplayPlaneInfo2KHR, DisplayPlaneProperties2KHR, DisplayPowerInfoEXT, DisplayPresentInfoKHR, DisplayProperties2KHR, DisplaySurfaceCreateInfoKHR, DrmFormatModifierPropertiesListEXT, EventCreateInfo, ExportFenceCreateInfo, ExportFenceWin32HandleInfoKHR, ExportMemoryAllocateInfo, ExportMemoryAllocateInfoNV, ExportMemoryWin32HandleInfoKHR, ExportMemoryWin32HandleInfoNV, ExportSemaphoreCreateInfo, ExportSemaphoreWin32HandleInfoKHR, ExternalBufferProperties, ExternalFenceProperties, ExternalFormatANDROID, ExternalImageFormatProperties, ExternalMemoryBufferCreateInfo, ExternalMemoryImageCreateInfo, ExternalMemoryImageCreateInfoNV, ExternalSemaphoreProperties, FenceCreateInfo, FenceGetFdInfoKHR, FenceGetWin32HandleInfoKHR, FilterCubicImageViewImageFormatPropertiesEXT, FormatProperties2, FramebufferAttachmentImageInfo, FramebufferAttachmentsCreateInfo, FramebufferCreateInfo, FramebufferMixedSamplesCombinationNV, GeneratedCommandsInfoNV, GeneratedCommandsMemoryRequirementsInfoNV, GeometryAABBNV, GeometryNV, GeometryTrianglesNV, GraphicsPipelineCreateInfo, GraphicsPipelineShaderGroupsCreateInfoNV, GraphicsShaderGroupCreateInfoNV, HdrMetadataEXT, HeadlessSurfaceCreateInfoEXT, IOSSurfaceCreateInfoMVK, ImageCreateInfo, ImageDrmFormatModifierExplicitCreateInfoEXT, ImageDrmFormatModifierListCreateInfoEXT, ImageDrmFormatModifierPropertiesEXT, ImageFormatListCreateInfo, ImageFormatProperties2, ImageMemoryBarrier, ImageMemoryRequirementsInfo2, ImagePipeSurfaceCreateInfoFUCHSIA, ImagePlaneMemoryRequirementsInfo, ImageSparseMemoryRequirementsInfo2, ImageStencilUsageCreateInfo, ImageSwapchainCreateInfoKHR, ImageViewASTCDecodeModeEXT, ImageViewAddressPropertiesNVX, ImageViewCreateInfo, ImageViewHandleInfoNVX, ImageViewUsageCreateInfo, ImportAndroidHardwareBufferInfoANDROID, ImportFenceFdInfoKHR, ImportFenceWin32HandleInfoKHR, ImportMemoryFdInfoKHR, ImportMemoryHostPointerInfoEXT, ImportMemoryWin32HandleInfoKHR, ImportMemoryWin32HandleInfoNV, ImportSemaphoreFdInfoKHR, ImportSemaphoreWin32HandleInfoKHR, IndirectCommandsLayoutCreateInfoNV, IndirectCommandsLayoutTokenNV, InitializePerformanceApiInfoINTEL, InstanceCreateInfo, MacOSSurfaceCreateInfoMVK, MappedMemoryRange, MemoryAllocateFlagsInfo, MemoryAllocateInfo, MemoryBarrier, MemoryDedicatedAllocateInfo, MemoryDedicatedRequirements, MemoryFdPropertiesKHR, MemoryGetAndroidHardwareBufferInfoANDROID, MemoryGetFdInfoKHR, MemoryGetWin32HandleInfoKHR, MemoryHostPointerPropertiesEXT, MemoryOpaqueCaptureAddressAllocateInfo, MemoryPriorityAllocateInfoEXT, MemoryRequirements2, MemoryWin32HandlePropertiesKHR, MetalSurfaceCreateInfoEXT, MultisamplePropertiesEXT, PerformanceConfigurationAcquireInfoINTEL, PerformanceCounterDescriptionKHR, PerformanceCounterKHR, PerformanceMarkerInfoINTEL, PerformanceOverrideInfoINTEL, PerformanceQuerySubmitInfoKHR, PerformanceStreamMarkerInfoINTEL, PhysicalDevice16BitStorageFeatures, PhysicalDevice8BitStorageFeatures, PhysicalDeviceASTCDecodeFeaturesEXT, PhysicalDeviceBlendOperationAdvancedFeaturesEXT, PhysicalDeviceBlendOperationAdvancedPropertiesEXT, PhysicalDeviceBufferDeviceAddressFeatures, PhysicalDeviceBufferDeviceAddressFeaturesEXT, PhysicalDeviceCoherentMemoryFeaturesAMD, PhysicalDeviceComputeShaderDerivativesFeaturesNV, PhysicalDeviceConditionalRenderingFeaturesEXT, PhysicalDeviceConservativeRasterizationPropertiesEXT, PhysicalDeviceCooperativeMatrixFeaturesNV, PhysicalDeviceCooperativeMatrixPropertiesNV, PhysicalDeviceCornerSampledImageFeaturesNV, PhysicalDeviceCoverageReductionModeFeaturesNV, PhysicalDeviceCustomBorderColorFeaturesEXT, PhysicalDeviceCustomBorderColorPropertiesEXT, PhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV, PhysicalDeviceDepthClipEnableFeaturesEXT, PhysicalDeviceDepthStencilResolveProperties, PhysicalDeviceDescriptorIndexingFeatures, PhysicalDeviceDescriptorIndexingProperties, PhysicalDeviceDeviceGeneratedCommandsFeaturesNV, PhysicalDeviceDeviceGeneratedCommandsPropertiesNV, PhysicalDeviceDiagnosticsConfigFeaturesNV, PhysicalDeviceDiscardRectanglePropertiesEXT, PhysicalDeviceDriverProperties, PhysicalDeviceExclusiveScissorFeaturesNV, PhysicalDeviceExternalBufferInfo, PhysicalDeviceExternalFenceInfo, PhysicalDeviceExternalImageFormatInfo, PhysicalDeviceExternalMemoryHostPropertiesEXT, PhysicalDeviceExternalSemaphoreInfo, PhysicalDeviceFeatures2, PhysicalDeviceFloatControlsProperties, PhysicalDeviceFragmentDensityMapFeaturesEXT, PhysicalDeviceFragmentDensityMapPropertiesEXT, PhysicalDeviceFragmentShaderBarycentricFeaturesNV, PhysicalDeviceFragmentShaderInterlockFeaturesEXT, PhysicalDeviceGroupProperties, PhysicalDeviceHostQueryResetFeatures, PhysicalDeviceIDProperties, PhysicalDeviceImageDrmFormatModifierInfoEXT, PhysicalDeviceImageFormatInfo2, PhysicalDeviceImageViewImageFormatInfoEXT, PhysicalDeviceImagelessFramebufferFeatures, PhysicalDeviceIndexTypeUint8FeaturesEXT, PhysicalDeviceInlineUniformBlockFeaturesEXT, PhysicalDeviceInlineUniformBlockPropertiesEXT, PhysicalDeviceLineRasterizationFeaturesEXT, PhysicalDeviceLineRasterizationPropertiesEXT, PhysicalDeviceMaintenance3Properties, PhysicalDeviceMemoryBudgetPropertiesEXT, PhysicalDeviceMemoryPriorityFeaturesEXT, PhysicalDeviceMemoryProperties2, PhysicalDeviceMeshShaderFeaturesNV, PhysicalDeviceMeshShaderPropertiesNV, PhysicalDeviceMultiviewFeatures, PhysicalDeviceMultiviewPerViewAttributesPropertiesNVX, PhysicalDeviceMultiviewProperties, PhysicalDevicePCIBusInfoPropertiesEXT, PhysicalDevicePerformanceQueryFeaturesKHR, PhysicalDevicePerformanceQueryPropertiesKHR, PhysicalDevicePipelineCreationCacheControlFeaturesEXT, PhysicalDevicePipelineExecutablePropertiesFeaturesKHR, PhysicalDevicePointClippingProperties, PhysicalDevicePrivateDataFeaturesEXT, PhysicalDeviceProperties2, PhysicalDeviceProtectedMemoryFeatures, PhysicalDeviceProtectedMemoryProperties, PhysicalDevicePushDescriptorPropertiesKHR, PhysicalDeviceRayTracingFeaturesKHR, PhysicalDeviceRayTracingPropertiesKHR, PhysicalDeviceRayTracingPropertiesNV, PhysicalDeviceRepresentativeFragmentTestFeaturesNV, PhysicalDeviceRobustness2FeaturesEXT, PhysicalDeviceRobustness2PropertiesEXT, PhysicalDeviceSampleLocationsPropertiesEXT, PhysicalDeviceSamplerFilterMinmaxProperties, PhysicalDeviceSamplerYcbcrConversionFeatures, PhysicalDeviceScalarBlockLayoutFeatures, PhysicalDeviceSeparateDepthStencilLayoutsFeatures, PhysicalDeviceShaderAtomicInt64Features, PhysicalDeviceShaderClockFeaturesKHR, PhysicalDeviceShaderCoreProperties2AMD, PhysicalDeviceShaderCorePropertiesAMD, PhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT, PhysicalDeviceShaderDrawParametersFeatures, PhysicalDeviceShaderFloat16Int8Features, PhysicalDeviceShaderImageFootprintFeaturesNV, PhysicalDeviceShaderIntegerFunctions2FeaturesINTEL, PhysicalDeviceShaderSMBuiltinsFeaturesNV, PhysicalDeviceShaderSMBuiltinsPropertiesNV, PhysicalDeviceShaderSubgroupExtendedTypesFeatures, PhysicalDeviceShadingRateImageFeaturesNV, PhysicalDeviceShadingRateImagePropertiesNV, PhysicalDeviceSparseImageFormatInfo2, PhysicalDeviceSubgroupProperties, PhysicalDeviceSubgroupSizeControlFeaturesEXT, PhysicalDeviceSubgroupSizeControlPropertiesEXT, PhysicalDeviceSurfaceInfo2KHR, PhysicalDeviceTexelBufferAlignmentFeaturesEXT, PhysicalDeviceTexelBufferAlignmentPropertiesEXT, PhysicalDeviceTextureCompressionASTCHDRFeaturesEXT, PhysicalDeviceTimelineSemaphoreFeatures, PhysicalDeviceTimelineSemaphoreProperties, PhysicalDeviceToolPropertiesEXT, PhysicalDeviceTransformFeedbackFeaturesEXT, PhysicalDeviceTransformFeedbackPropertiesEXT, PhysicalDeviceUniformBufferStandardLayoutFeatures, PhysicalDeviceVariablePointersFeatures, PhysicalDeviceVertexAttributeDivisorFeaturesEXT, PhysicalDeviceVertexAttributeDivisorPropertiesEXT, PhysicalDeviceVulkan11Features, PhysicalDeviceVulkan11Properties, PhysicalDeviceVulkan12Features, PhysicalDeviceVulkan12Properties, PhysicalDeviceVulkanMemoryModelFeatures, PhysicalDeviceYcbcrImageArraysFeaturesEXT, PipelineCacheCreateInfo, PipelineColorBlendAdvancedStateCreateInfoEXT, PipelineColorBlendStateCreateInfo, PipelineCompilerControlCreateInfoAMD, PipelineCoverageModulationStateCreateInfoNV, PipelineCoverageReductionStateCreateInfoNV, PipelineCoverageToColorStateCreateInfoNV, PipelineCreationFeedbackCreateInfoEXT, PipelineDepthStencilStateCreateInfo, PipelineDiscardRectangleStateCreateInfoEXT, PipelineDynamicStateCreateInfo, PipelineExecutableInfoKHR, PipelineExecutableInternalRepresentationKHR, PipelineExecutablePropertiesKHR, PipelineExecutableStatisticKHR, PipelineInfoKHR, PipelineInputAssemblyStateCreateInfo, PipelineLayoutCreateInfo, PipelineLibraryCreateInfoKHR, PipelineMultisampleStateCreateInfo, PipelineRasterizationConservativeStateCreateInfoEXT, PipelineRasterizationDepthClipStateCreateInfoEXT, PipelineRasterizationLineStateCreateInfoEXT, PipelineRasterizationStateCreateInfo, PipelineRasterizationStateRasterizationOrderAMD, PipelineRasterizationStateStreamCreateInfoEXT, PipelineRepresentativeFragmentTestStateCreateInfoNV, PipelineSampleLocationsStateCreateInfoEXT, PipelineShaderStageCreateInfo, PipelineShaderStageRequiredSubgroupSizeCreateInfoEXT, PipelineTessellationDomainOriginStateCreateInfo, PipelineTessellationStateCreateInfo, PipelineVertexInputDivisorStateCreateInfoEXT, PipelineVertexInputStateCreateInfo, PipelineViewportCoarseSampleOrderStateCreateInfoNV, PipelineViewportExclusiveScissorStateCreateInfoNV, PipelineViewportShadingRateImageStateCreateInfoNV, PipelineViewportStateCreateInfo, PipelineViewportSwizzleStateCreateInfoNV, PipelineViewportWScalingStateCreateInfoNV, PresentFrameTokenGGP, PresentInfoKHR, PresentRegionsKHR, PresentTimesInfoGOOGLE, PrivateDataSlotCreateInfoEXT, ProtectedSubmitInfo, QueryPoolCreateInfo, QueryPoolPerformanceCreateInfoKHR, QueryPoolPerformanceQueryCreateInfoINTEL, QueueFamilyCheckpointPropertiesNV, QueueFamilyProperties2, RayTracingPipelineCreateInfoKHR, RayTracingPipelineCreateInfoNV, RayTracingPipelineInterfaceCreateInfoKHR, RayTracingShaderGroupCreateInfoKHR, RayTracingShaderGroupCreateInfoNV, RenderPassAttachmentBeginInfo, RenderPassBeginInfo, RenderPassCreateInfo, RenderPassCreateInfo2, RenderPassFragmentDensityMapCreateInfoEXT, RenderPassInputAttachmentAspectCreateInfo, RenderPassMultiviewCreateInfo, RenderPassSampleLocationsBeginInfoEXT, RenderPassTransformBeginInfoQCOM, SampleLocationsInfoEXT, SamplerCreateInfo, SamplerCustomBorderColorCreateInfoEXT, SamplerReductionModeCreateInfo, SamplerYcbcrConversionCreateInfo, SamplerYcbcrConversionImageFormatProperties, SamplerYcbcrConversionInfo, SemaphoreCreateInfo, SemaphoreGetFdInfoKHR, SemaphoreGetWin32HandleInfoKHR, SemaphoreSignalInfo, SemaphoreTypeCreateInfo, SemaphoreWaitInfo, ShaderModuleCreateInfo, ShaderModuleValidationCacheCreateInfoEXT, SharedPresentSurfaceCapabilitiesKHR, SparseImageFormatProperties2, SparseImageMemoryRequirements2, StreamDescriptorSurfaceCreateInfoGGP, SubmitInfo, SubpassBeginInfo, SubpassDependency2, SubpassDescription2, SubpassDescriptionDepthStencilResolve, SubpassEndInfo, SurfaceCapabilities2EXT, SurfaceCapabilities2KHR, SurfaceCapabilitiesFullScreenExclusiveEXT, SurfaceFormat2KHR, SurfaceFullScreenExclusiveInfoEXT, SurfaceFullScreenExclusiveWin32InfoEXT, SurfaceProtectedCapabilitiesKHR, SwapchainCounterCreateInfoEXT, SwapchainCreateInfoKHR, SwapchainDisplayNativeHdrCreateInfoAMD, TextureLODGatherFormatPropertiesAMD, TimelineSemaphoreSubmitInfo, ValidationCacheCreateInfoEXT, ValidationFeaturesEXT, ValidationFlagsEXT, ViSurfaceCreateInfoNN, WaylandSurfaceCreateInfoKHR, Win32KeyedMutexAcquireReleaseInfoKHR, Win32KeyedMutexAcquireReleaseInfoNV, Win32SurfaceCreateInfoKHR, WriteDescriptorSet, WriteDescriptorSetAccelerationStructureKHR, WriteDescriptorSetInlineUniformBlockEXT, XcbSurfaceCreateInfoKHR, XlibSurfaceCreateInfoKHR

VkQueueFlagBits - Bitmask specifying capabilities of queues in a queue family

Description

• QUEUE_GRAPHICS_BIT specifies that queues in this queue family support graphics operations.

• QUEUE_COMPUTE_BIT specifies that queues in this queue family support compute operations.
• QUEUE_TRANSFER_BIT specifies that queues in this queue family support transfer operations.
• QUEUE_SPARSE_BINDING_BIT specifies that queues in this queue family support sparse memory management operations (see Sparse Resources). If any of the sparse resource features are enabled, then at least one queue family must support this bit.
• if QUEUE_PROTECTED_BIT is set, then the queues in this queue family support the DEVICE_QUEUE_CREATE_PROTECTED_BIT bit. (see Protected Memory). If the protected memory physical device feature is supported, then at least one queue family of at least one physical device exposed by the implementation must support this bit.

If an implementation exposes any queue family that supports graphics operations, at least one queue family of at least one physical device exposed by the implementation must support both graphics and compute operations.

Furthermore, if the protected memory physical device feature is supported, then at least one queue family of at least one physical device exposed by the implementation must support graphics operations, compute operations, and protected memory operations.

Note

All commands that are allowed on a queue that supports transfer operations are also allowed on a queue that supports either graphics or compute operations. Thus, if the capabilities of a queue family include QUEUE_GRAPHICS_BIT or QUEUE_COMPUTE_BIT, then reporting the QUEUE_TRANSFER_BIT capability separately for that queue family is optional.

For further details see Queues.

See Also

QueueFlags

VkDeviceQueueCreateFlagBits - Bitmask specifying behavior of the queue

See Also

DeviceQueueCreateFlags

VkMemoryPropertyFlagBits - Bitmask specifying properties for a memory type

Description

For any memory allocated with both the MEMORY_PROPERTY_HOST_COHERENT_BIT and the MEMORY_PROPERTY_DEVICE_COHERENT_BIT_AMD, host or device accesses also perform automatic memory domain transfer operations, such that writes are always automatically available and visible to both host and device memory domains.

Note

Device coherence is a useful property for certain debugging use cases (e.g. crash analysis, where performing separate coherence actions could mean values are not reported correctly). However, device coherent accesses may be slower than equivalent accesses without device coherence, particularly if they are also device uncached. For device uncached memory in particular, repeated accesses to the same or neighbouring memory locations over a short time period (e.g. within a frame) may be slower than it would be for the equivalent cached memory type. As such, it is generally inadvisable to use device coherent or device uncached memory except when really needed.

See Also

MemoryPropertyFlags