Direct3D feature levels discussion

Discussion in 'Rendering Technology and APIs' started by DmitryKo, Feb 20, 2015.

  1. CarstenS

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    I was just comparing numbers, let me cross-check. edit: You're right, I'll edit.
    edit 2: Dang, I should resume keeping my DX caps table...
    edit 3:
     
    #1101 CarstenS, Nov 18, 2020
    Last edited: Nov 19, 2020
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  2. CarstenS

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    Did this, but it's still reporting SM 6_5 on RTX 30.
     
  3. Pinstripe

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    You likely need to have 460 or 465 branch drivers installed on Win 10 21H1 to show any SM 6.6 support.
     
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  4. DegustatoR

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    Yeah, SM 6.6 doesn't seem to be supported on NV h/w even as an experimental feature yet. Will come eventually though, and to Turings too most likely.
     
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  5. DmitryKo

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    I've checked D3D12DDI_SHADER_MODEL in the Insider Preview SDK/WDK, and experimental SM 6_6 is supported with WDDM 2.7, i.e. Windows 10 build 1904x (versions 2004/2009 etc).
    WDDM 2.8/2.9 (Insider Preview Manganese / Iron) support 6_6 release and 6_7 experimental.

    But of course user-mode video driver needs to explicitly enable them.

    In comparison to RX5700:
    Code:
    BarycentricsSupported : 1
    RaytracingTier : D3D12_RAYTRACING_TIER_1_1 (11)
    PerPrimitiveShadingRateSupportedWithViewportIndexing : 1
    VariableShadingRateTier : D3D12_VARIABLE_SHADING_RATE_TIER_2 (2)
    ShadingRateImageTileSize : 8
    MeshShaderTier : D3D12_MESH_SHADER_TIER_1 (10)
    SamplerFeedbackTier : D3D12_SAMPLER_FEEDBACK_TIER_1_0 (100)
    
    Comparing to RTX2080/3090, features are roughly a match, with the same variable shading rate tier (2), better sample feedback tier (1_0 vs 0_9), and lower view instancing tier (1 vs 3).
     
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  6. Rodéric

    Rodéric a.k.a. Ingenu
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    Is there a WDDM version in which using GPU virtual memory won't suck ? (ie be as slow as a snail ?)
     
  7. Alessio1989

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  8. DmitryKo

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    WARP12 reports KMT_DRIVERVERSION_WDDM_3_0 in Windows 10 Insider Preview Cobalt (build 21277.1000 rs_prerelease); matching SDK/WDK build has not been released yet, but upping of major version number indicates some significant changes under the hood.
     
    #1109 DmitryKo, Dec 17, 2020
    Last edited: Dec 18, 2020
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  9. Ethatron

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  10. DmitryKo

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    I think it's something else. If you read the original Microsoft blog post "Direct3D loves Linux", DXGK paravirtualization DDIs required by Direct3D 12 for WSL2 are available since WDDM 2.5. New is supports bundling of proprietary Direct3D12 User Mode Driver binaries for WSL2 with graphics driver packages, but this already works in Windows 10 Iron with WDDM 2.9 WSL2 preview drivers, and version 2.10 would be more appropriate for small refinements than a major version bump.
     
    #1111 DmitryKo, Dec 18, 2020
    Last edited: Jan 20, 2021
  11. DegustatoR

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    Can it be 2.10 without breaking something? Maybe they've just ran out of decimals in 2.x?
     
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  12. DmitryKo

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    You're right - driver model version is an integer constant in the WDK header file, and 2.10 would break their established decimal encoding pattern. Doh!
    Code:
        KMT_DRIVERVERSION_WDDM_2_9 = 2900
    
     
    #1113 DmitryKo, Dec 18, 2020
    Last edited: Jan 6, 2021
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  13. DegustatoR

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  14. DavidGraham

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  15. DmitryKo

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    #1116 DmitryKo, Feb 3, 2021
    Last edited: Feb 3, 2021
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  16. DmitryKo

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    BTW Adrenalin driver v21.2.1 adds finer compute preemption granularity with preliminary support for hardware-accelerated scheduler on RDNA cards (the latter is also available with WU driver 27.20.14502.208 for insider builds). Here's how Insider Preview "Cobalt" reports it on my RX 5700 XT:

    Code:
    Video driver version : 27.20.14533.1000
    WDDM version : KMT_DRIVERVERSION_WDDM_2_7 (2700)
    Hardware-accelerated scheduler : Enabled, DXGK_FEATURE_SUPPORT_EXPERIMENTAL (1)
    ComputePreemptionGranularity : DXGI_COMPUTE_PREEMPTION_DISPATCH_BOUNDARY (1)
    
    The control for enabling the scheduler is still not showing in System - Display - Graphics Settings - Advanced...
     
    #1117 DmitryKo, Feb 3, 2021
    Last edited: Feb 4, 2021
  17. CarstenS

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    Code:
    Direct3D 12 feature checker (May 2020) by DmitryKo (x64)
    https://forum.beyond3d.com/posts/1840641/
    
    Windows 10 version 2009 (build 19042.804 vb_release) x64
    Checking for experimental features SM6 TR4 META
    
    ADAPTER 0
    "Intel(R) Iris(R) Xe Graphics"
    VEN_8086, DEV_9A40, SUBSYS_22128086, REV_01
    Dedicated video memory : 128.0 MB (134217728 bytes)
    Total video memory : 8191.3 MB (8589156352 bytes)
    Video driver version : 27.20.100.9168
    WDDM version : KMT_DRIVERVERSION_WDDM_2_7 (2700)
    Hardware-accelerated scheduler : Disabled, not supported
    GraphicsPreemptionGranularity : DXGI_GRAPHICS_PREEMPTION_TRIANGLE_BOUNDARY (2)
    ComputePreemptionGranularity : DXGI_COMPUTE_PREEMPTION_THREAD_GROUP_BOUNDARY (2)
    Maximum feature level : D3D_FEATURE_LEVEL_12_1 (0xc100)
    DoublePrecisionFloatShaderOps : 0
    OutputMergerLogicOp : 1
    MinPrecisionSupport : D3D12_SHADER_MIN_PRECISION_SUPPORT_16_BIT (2) (0b0000'0010)
    TiledResourcesTier : D3D12_TILED_RESOURCES_TIER_3 (3)
    ResourceBindingTier : D3D12_RESOURCE_BINDING_TIER_3 (3)
    PSSpecifiedStencilRefSupported : 1
    TypedUAVLoadAdditionalFormats : 1
    ROVsSupported : 1
    ConservativeRasterizationTier : D3D12_CONSERVATIVE_RASTERIZATION_TIER_3 (3)
    StandardSwizzle64KBSupported : 0
    CrossNodeSharingTier : D3D12_CROSS_NODE_SHARING_TIER_NOT_SUPPORTED (0)
    CrossAdapterRowMajorTextureSupported : 1
    VPAndRTArrayIndexFromAnyShaderFeedingRasterizerSupportedWithoutGSEmulation : 1
    ResourceHeapTier : D3D12_RESOURCE_HEAP_TIER_2 (2)
    MaxGPUVirtualAddressBitsPerResource : 44
    MaxGPUVirtualAddressBitsPerProcess : 48
    Adapter Node 0:     TileBasedRenderer: 0, UMA: 1, CacheCoherentUMA: 1, IsolatedMMU: 1, HeapSerializationTier: 0, ProtectedResourceSession.Support: 1, ProtectedResourceSessionTypeCount: 1 D3D12_PROTECTED_RESOURCES_SESSION_HARDWARE_PROTECTED
    HighestShaderModel : D3D12_SHADER_MODEL_6_5 (0x0065)
    WaveOps : 1
    WaveLaneCountMin : 16
    WaveLaneCountMax : 16
    TotalLaneCount : 1536
    ExpandedComputeResourceStates : 1
    Int64ShaderOps : 1
    RootSignature.HighestVersion : D3D_ROOT_SIGNATURE_VERSION_1_1 (2)
    DepthBoundsTestSupported : 1
    ProgrammableSamplePositionsTier : D3D12_PROGRAMMABLE_SAMPLE_POSITIONS_TIER_1 (1)
    ShaderCache.SupportFlags : D3D12_SHADER_CACHE_SUPPORT_SINGLE_PSO | LIBRARY | AUTOMATIC_INPROC_CACHE | AUTOMATIC_DISK_CACHE (15) (0b0000'1111)
    CopyQueueTimestampQueriesSupported : 1
    CastingFullyTypedFormatSupported : 1
    WriteBufferImmediateSupportFlags : D3D12_COMMAND_LIST_SUPPORT_FLAG_DIRECT | BUNDLE | COMPUTE | COPY (15) (0b0000'1111)
    ViewInstancingTier : D3D12_VIEW_INSTANCING_TIER_2 (2)
    BarycentricsSupported : 0
    ExistingHeaps.Supported : 1
    MSAA64KBAlignedTextureSupported : 1
    SharedResourceCompatibilityTier : D3D12_SHARED_RESOURCE_COMPATIBILITY_TIER_2 (2)
    Native16BitShaderOpsSupported : 1
    AtomicShaderInstructions : 0
    SRVOnlyTiledResourceTier3 : 1
    RenderPassesTier : D3D12_RENDER_PASS_TIER_0 (0)
    RaytracingTier : D3D12_RAYTRACING_TIER_NOT_SUPPORTED (0)
    AdditionalShadingRatesSupported : 1
    PerPrimitiveShadingRateSupportedWithViewportIndexing : 0
    VariableShadingRateTier : D3D12_VARIABLE_SHADING_RATE_TIER_1 (1)
    ShadingRateImageTileSize : 0
    BackgroundProcessingSupported : 0
    MeshShaderTier : D3D12_MESH_SHADER_TIER_NOT_SUPPORTED (0)
    SamplerFeedbackTier : D3D12_SAMPLER_FEEDBACK_TIER_0_9 (90)
    Failed to query feature data 8
    Error 80070057: The parameter is incorrect.
    
    DirectML maximum feature level : DML_FEATURE_LEVEL_2_0 (0x2000)
    Metacommands enumerated : 8
    Metacommands [parameters per stage]: Conv (Convolution) [84][1][6], GEMM (General matrix multiply) [67][1][6], Pooling [44][1][4], Conv (Convolution) [108][5][6], GEMM (General matrix multiply) [91][5][6], MVN (Mean Variance Normalization) [91][5][6], Pooling [56][3][4], LSTM (Long Short-Term Memory) [252][10][13]
    
    As mentioned elswhere, I was surprised that Intels latest and greatest did not have Mesh Shader enabled and also only the lower tier Variable Rate Shading.
    I hope for the best for Xe HPG and of course that this is only a driver issue for now.
     
  18. Kaotik

    Kaotik Drunk Member
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    Xe-LP would miss some DX12U features regardless, so they could have just figured "why bother with any" for it. Xe-HPG on the other hand has been confirmed to support RT and I doubt they would have been so shortsighted that they'd miss other DX12U features (especially since we already know MS can give some leeway like they did for NVIDIA)
     
  19. CarstenS

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    Mesh shaders, in contrast to raytracing, can help improve framerate, thus making games playable in the first place on lower tier integrated graphics.
     
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