Vega Counters

Timing Group

Counter Name	Usage	Brief Description
GPUTime	Nanoseconds	Time this API command took to execute on the GPU in nanoseconds from the time the previous command reached the bottom of the pipeline (BOP) to the time this command reaches the bottom of the pipeline (BOP). Does not include time that draw calls are processed in parallel.
ExecutionDuration	Nanoseconds	GPU command execution duration in nanoseconds, from the time the command enters the top of the pipeline (TOP) to the time the command reaches the bottom of the pipeline (BOP). Does not include time that draw calls are processed in parallel.
ExecutionStart	Nanoseconds	GPU command execution start time in nanoseconds. This is the time the command enters the top of the pipeline (TOP).
ExecutionEnd	Nanoseconds	GPU command execution end time in nanoseconds. This is the time the command reaches the bottom of the pipeline (BOP).
GPUBusy	Percentage	The percentage of time the GPU command processor was busy.
GPUBusyCycles	Cycles	Number of GPU cycles that the GPU command processor was busy.
TessellatorBusy	Percentage	The percentage of time the tessellation engine is busy.
TessellatorBusyCycles	Cycles	Number of GPU cycles that the tessellation engine is busy.
VsGsBusy	Percentage	The percentage of time the ShaderUnit has VS or GS work to do in a VS-[GS-]PS pipeline.
VsGsBusyCycles	Cycles	Number of GPU cycles that the ShaderUnit has VS or GS work to do in a VS-[GS-]PS pipeline.
VsGsTime	Nanoseconds	Time VS or GS are busy in nanoseconds in a VS-[GS-]PS pipeline.
PreTessellationBusy	Percentage	The percentage of time the ShaderUnit has VS and HS work to do in a pipeline that uses tessellation.
PreTessellationBusyCycles	Cycles	Number of GPU cycles that the ShaderUnit has VS and HS work to do in a pipeline that uses tessellation.
PreTessellationTime	Nanoseconds	Time VS and HS are busy in nanoseconds in a pipeline that uses tessellation.
PostTessellationBusy	Percentage	The percentage of time the ShaderUnit has DS or GS work to do in a pipeline that uses tessellation.
PostTessellationBusyCycles	Cycles	Number of GPU cycles that the ShaderUnit has DS or GS work to do in a pipeline that uses tessellation.
PostTessellationTime	Nanoseconds	Time DS or GS are busy in nanoseconds in a pipeline that uses tessellation.
PSBusy	Percentage	The percentage of time the ShaderUnit has pixel shader work to do.
PSBusyCycles	Cycles	Number of GPU cycles that the ShaderUnit has pixel shader work to do.
PSTime	Nanoseconds	Time pixel shaders are busy in nanoseconds.
CSBusy	Percentage	The percentage of time the ShaderUnit has compute shader work to do.
CSBusyCycles	Cycles	Number of GPU cycles that the ShaderUnit has compute shader work to do.
CSTime	Nanoseconds	Time compute shaders are busy in nanoseconds.
PrimitiveAssemblyBusy	Percentage	The percentage of GPUTime that primitive assembly (clipping and culling) is busy. High values may be caused by having many small primitives; mid to low values may indicate pixel shader or output buffer bottleneck.
PrimitiveAssemblyBusyCycles	Cycles	Number of GPU cycles the primitive assembly (clipping and culling) is busy. High values may be caused by having many small primitives; mid to low values may indicate pixel shader or output buffer bottleneck.
TexUnitBusy	Percentage	The percentage of GPUTime the texture unit is active. This is measured with all extra fetches and any cache or memory effects taken into account.
TexUnitBusyCycles	Cycles	Number of GPU cycles the texture unit is active. This is measured with all extra fetches and any cache or memory effects taken into account.
DepthStencilTestBusy	Percentage	Percentage of time GPU spent performing depth and stencil tests relative to GPUBusy.
DepthStencilTestBusyCycles	Cycles	Number of GPU cycles spent performing depth and stencil tests.

VertexGeometry Group

Counter Name	Usage	Brief Description
VsGsVerticesIn	Items	The number of unique vertices processed by the VS and GS.
VsGsPrimsIn	Items	The number of primitives passed into the VS and GS.
GSVerticesOut	Items	The number of vertices output by the GS.
VsGsVALUInstCount	Items	Average number of vector ALU instructions executed in the VS and GS in a VS-[GS-]PS pipeline. Affected by flow control.
VsGsSALUInstCount	Items	Average number of scalar ALU instructions executed in the VS and GS in a VS-[GS-]PS pipeline. Affected by flow control.
VsGsVALUBusy	Percentage	The percentage of GPUTime vector ALU instructions are being processed by the VS and GS in a VS-[GS-]PS pipeline.
VsGsVALUBusyCycles	Cycles	Number of GPU cycles where vector ALU instructions are being processed by the VS and GS in a VS-[GS-]PS pipeline.
VsGsSALUBusy	Percentage	The percentage of GPUTime scalar ALU instructions are being processed by the VS and GS in a VS-[GS-]PS pipeline.
VsGsSALUBusyCycles	Cycles	Number of GPU cycles where scalar ALU instructions are being processed by the VS and GS in a VS-[GS-]PS pipeline.

PreTessellation Group

Counter Name	Usage	Brief Description
PreTessVerticesIn	Items	The number of vertices processed by the VS and HS when using tessellation.
PreTessVALUInstCount	Items	Average number of vector ALU instructions executed for the VS and HS in a pipeline that uses tessellation. Affected by flow control.
PreTessSALUInstCount	Items	Average number of scalar ALU instructions executed for the VS and HS in a pipeline that uses tessellation. Affected by flow control.
PreTessVALUBusy	Percentage	The percentage of GPUTime vector ALU instructions are being processed for the VS and HS in a pipeline that uses tessellation.
PreTessVALUBusyCycles	Cycles	Number of GPU cycles vector where ALU instructions are being processed for the VS and HS in a pipeline that uses tessellation.
PreTessSALUBusy	Percentage	The percentage of GPUTime scalar ALU instructions are being processed for the VS and HS in a pipeline that uses tessellation.
PreTessSALUBusyCycles	Cycles	Number of GPU cycles where scalar ALU instructions are being processed for the VS and HS in a pipeline that uses tessellation.

PostTessellation Group

Counter Name	Usage	Brief Description
PostTessPrimsOut	Items	The number of primitives output by the DS and GS when using tessellation.
PostTessVALUInstCount	Items	Average number of vector ALU instructions executed for the DS and GS in a pipeline that uses tessellation. Affected by flow control.
PostTessSALUInstCount	Items	Average number of scalar ALU instructions executed for the DS and GS in a pipeline that uses tessellation. Affected by flow control.
PostTessVALUBusy	Percentage	The percentage of GPUTime vector ALU instructions are being processed for the DS and GS in a pipeline that uses tessellation.
PostTessVALUBusyCycles	Cycles	Number of GPU cycles vector where ALU instructions are being processed for the DS and GS in a pipeline that uses tessellation.
PostTessSALUBusy	Percentage	The percentage of GPUTime scalar ALU instructions are being processed for the DS and GS in a pipeline that uses tessellation.
PostTessSALUBusyCycles	Cycles	Number of GPU cycles where scalar ALU instructions are being processed for the DS and GS in a pipeline that uses tessellation.

PrimitiveAssembly Group

Counter Name	Usage	Brief Description
PrimitivesIn	Items	The number of primitives received by the hardware. This includes primitives generated by tessellation.
CulledPrims	Items	The number of culled primitives. Typical reasons include scissor, the primitive having zero area, and back or front face culling.
ClippedPrims	Items	The number of primitives that required one or more clipping operations due to intersecting the view volume or user clip planes.
PAStalledOnRasterizer	Percentage	Percentage of GPUTime that primitive assembly waits for rasterization to be ready to accept data. This roughly indicates for what percentage of time the pipeline is bottlenecked by pixel operations.
PAStalledOnRasterizerCycles	Cycles	Number of GPU cycles the primitive assembly waits for rasterization to be ready to accept data. Indicates the number of GPU cycles the pipeline is bottlenecked by pixel operations.

PixelShader Group

Counter Name	Usage	Brief Description
PSPixelsOut	Items	Pixels exported from shader to color buffers. Does not include killed or alpha tested pixels; if there are multiple render targets, each render target receives one export, so this will be 2 for 1 pixel written to two RTs.
PSExportStalls	Percentage	Pixel shader output stalls. Percentage of GPUBusy. Should be zero for PS or further upstream limited cases; if not zero, indicates a bottleneck in late Z testing or in the color buffer.
PSExportStallsCycles	Cycles	Number of GPU cycles the pixel shader output stalls. Should be zero for PS or further upstream limited cases; if not zero, indicates a bottleneck in late Z testing or in the color buffer.
PSVALUInstCount	Items	Average number of vector ALU instructions executed in the PS. Affected by flow control.
PSSALUInstCount	Items	Average number of scalar ALU instructions executed in the PS. Affected by flow control.
PSVALUBusy	Percentage	The percentage of GPUTime vector ALU instructions are being processed by the PS.
PSVALUBusyCycles	Cycles	Number of GPU cycles where vector ALU instructions are being processed by the PS.
PSSALUBusy	Percentage	The percentage of GPUTime scalar ALU instructions are being processed by the PS.
PSSALUBusyCycles	Cycles	Number of GPU cycles where scalar ALU instructions are being processed by the PS.

ComputeShader Group

Counter Name	Usage	Brief Description
CSThreadGroupsLaunched	Items	Total number of thread groups launched.
CSWavefrontsLaunched	Items	The total number of wavefronts launched for the CS.
CSThreadsLaunched	Items	The number of CS threads launched and processed by the hardware.
CSThreadGroupSize	Items	The number of CS threads within each thread group.
CSVALUInsts	Items	The average number of vector ALU instructions executed per work-item (affected by flow control).
CSVALUUtilization	Percentage	The percentage of active vector ALU threads in a wave. A lower number can mean either more thread divergence in a wave or that the work-group size is not a multiple of 64. Value range: 0% (bad), 100% (ideal – no thread divergence).
CSSALUInsts	Items	The average number of scalar ALU instructions executed per work-item (affected by flow control).
CSVFetchInsts	Items	The average number of vector fetch instructions from the video memory executed per work-item (affected by flow control).
CSSFetchInsts	Items	The average number of scalar fetch instructions from the video memory executed per work-item (affected by flow control).
CSVWriteInsts	Items	The average number of vector write instructions to the video memory executed per work-item (affected by flow control).
CSFlatVMemInsts	Items	The average number of FLAT instructions that read from or write to the video memory executed per work item (affected by flow control). Includes FLAT instructions that read from or write to scratch.
CSVALUBusy	Percentage	The percentage of GPUTime vector ALU instructions are processed. Value range: 0% (bad) to 100% (optimal).
CSVALUBusyCycles	Cycles	Number of GPU cycles where vector ALU instructions are processed.
CSSALUBusy	Percentage	The percentage of GPUTime scalar ALU instructions are processed. Value range: 0% (bad) to 100% (optimal).
CSSALUBusyCycles	Cycles	Number of GPU cycles where scalar ALU instructions are processed.
CSGDSInsts	Items	The average number of GDS read or GDS write instructions executed per work item (affected by flow control).
CSLDSInsts	Items	The average number of LDS read/write instructions executed per work-item (affected by flow control).
CSFlatLDSInsts	Items	The average number of FLAT instructions that read from or write to LDS executed per work item (affected by flow control).
CSALUStalledByLDS	Percentage	The percentage of GPUTime ALU units are stalled by the LDS input queue being full or the output queue being not ready. If there are LDS bank conflicts, reduce them. Otherwise, try reducing the number of LDS accesses if possible. Value range: 0% (optimal) to 100% (bad).
CSALUStalledByLDSCycles	Cycles	Number of GPU cycles each wavefronts’ ALU units are stalled by the LDS input queue being full or the output queue being not ready. If there are LDS bank conflicts, reduce them. Otherwise, try reducing the number of LDS accesses if possible.
CSLDSBankConflict	Percentage	The percentage of GPUTime LDS is stalled by bank conflicts. Value range: 0% (optimal) to 100% (bad).
CSLDSBankConflictCycles	Cycles	Number of GPU cycles the LDS is stalled by bank conflicts. Value range: 0 (optimal) to GPUBusyCycles (bad).

TextureUnit Group

Counter Name	Usage	Brief Description
TexTriFilteringPct	Percentage	Percentage of pixels that received trilinear filtering. Note that not all pixels for which trilinear filtering is enabled will receive it (e.g. if the texture is magnified).
TexTriFilteringCount	Items	Count of pixels that received trilinear filtering. Note that not all pixels for which trilinear filtering is enabled will receive it (e.g. if the texture is magnified).
NoTexTriFilteringCount	Items	Count of pixels that did not receive trilinear filtering.
TexVolFilteringPct	Percentage	Percentage of pixels that received volume filtering.
TexVolFilteringCount	Items	Count of pixels that received volume filtering.
NoTexVolFilteringCount	Items	Count of pixels that did not receive volume filtering.
TexAveAnisotropy	Items	The average degree of anisotropy applied. A number between 1 and 16. The anisotropic filtering algorithm only applies samples where they are required (e.g. there will be no extra anisotropic samples if the view vector is perpendicular to the surface) so this can be much lower than the requested anisotropy.

DepthAndStencil Group

Counter Name	Usage	Brief Description
HiZTilesAccepted	Percentage	Percentage of tiles accepted by HiZ and will be rendered to the depth or color buffers.
HiZTilesAcceptedCount	Items	Count of tiles accepted by HiZ and will be rendered to the depth or color buffers.
HiZTilesRejectedCount	Items	Count of tiles not accepted by HiZ.
PreZTilesDetailCulled	Percentage	Percentage of tiles rejected because the associated prim had no contributing area.
PreZTilesDetailCulledCount	Items	Count of tiles rejected because the associated primitive had no contributing area.
PreZTilesDetailSurvivingCount	Items	Count of tiles surviving because the associated primitive had contributing area.
HiZQuadsCulled	Percentage	Percentage of quads that did not have to continue on in the pipeline after HiZ. They may be written directly to the depth buffer, or culled completely. Consistently low values here may suggest that the Z-range is not being fully utilized.
HiZQuadsCulledCount	Items	Count of quads that did not have to continue on in the pipeline after HiZ. They may be written directly to the depth buffer, or culled completely. Consistently low values here may suggest that the Z-range is not being fully utilized.
HiZQuadsAcceptedCount	Items	Count of quads that did continue on in the pipeline after HiZ.
PreZQuadsCulled	Percentage	Percentage of quads rejected based on the detailZ and earlyZ tests.
PreZQuadsCulledCount	Items	Count of quads rejected based on the detailZ and earlyZ tests.
PreZQuadsSurvivingCount	Items	Count of quads surviving detailZ and earlyZ tests.
PostZQuads	Percentage	Percentage of quads for which the pixel shader will run and may be postZ tested.
PostZQuadCount	Items	Count of quads for which the pixel shader will run and may be postZ tested.
PreZSamplesPassing	Items	Number of samples tested for Z before shading and passed.
PreZSamplesFailingS	Items	Number of samples tested for Z before shading and failed stencil test.
PreZSamplesFailingZ	Items	Number of samples tested for Z before shading and failed Z test.
PostZSamplesPassing	Items	Number of samples tested for Z after shading and passed.
PostZSamplesFailingS	Items	Number of samples tested for Z after shading and failed stencil test.
PostZSamplesFailingZ	Items	Number of samples tested for Z after shading and failed Z test.
ZUnitStalled	Percentage	The percentage of GPUTime the depth buffer spends waiting for the color buffer to be ready to accept data. High figures here indicate a bottleneck in color buffer operations.
ZUnitStalledCycles	Cycles	Number of GPU cycles the depth buffer spends waiting for the color buffer to be ready to accept data. Larger numbers indicate a bottleneck in color buffer operations.
DBMemRead	Bytes	Number of bytes read from the depth buffer.
DBMemWritten	Bytes	Number of bytes written to the depth buffer.

ColorBuffer Group

Counter Name	Usage	Brief Description
CBMemRead	Bytes	Number of bytes read from the color buffer.
CBColorAndMaskRead	Bytes	Total number of bytes read from the color and mask buffers.
CBMemWritten	Bytes	Number of bytes written to the color buffer.
CBColorAndMaskWritten	Bytes	Total number of bytes written to the color and mask buffers.
CBSlowPixelPct	Percentage	Percentage of pixels written to the color buffer using a half-rate or quarter-rate format.
CBSlowPixelCount	Items	Number of pixels written to the color buffer using a half-rate or quarter-rate format.

MemoryCache Group

Counter Name	Usage	Brief Description
L0TagConflictReadStalledCycles	Items	The number of cycles read operations from the L0 cache are stalled due to tag conflicts.
L0TagConflictWriteStalledCycles	Items	The number of cycles write operations to the L0 cache are stalled due to tag conflicts.
L0TagConflictAtomicStalledCycles	Items	The number of cycles atomic operations on the L0 cache are stalled due to tag conflicts.

GlobalMemory Group

Counter Name	Usage	Brief Description
FetchSize	Bytes	The total bytes fetched from the video memory. This is measured with all extra fetches and any cache or memory effects taken into account.
WriteSize	Bytes	The total bytes written to the video memory. This is measured with all extra fetches and any cache or memory effects taken into account.
L1CacheHit	Percentage	The percentage of fetch, write, atomic, and other instructions that hit the data in L1 cache. Value range: 0% (no hit) to 100% (optimal).
L1CacheHitCount	Items	Count of fetch, write, atomic, and other instructions that hit the data in L1 cache.
L1CacheMissCount	Items	Count of fetch, write, atomic, and other instructions that miss the data in L1 cache.
L2CacheHit	Percentage	The percentage of fetch, write, atomic, and other instructions that hit the L2 cache. Value range: 0% (no hit) to 100% (optimal).
L2CacheMiss	Percentage	The percentage of fetch, write, atomic, and other instructions that miss the L2 cache. Value range: 0% (optimal) to 100% (all miss).
L2CacheHitCount	Items	Count of fetch, write, atomic, and other instructions that hit the L2 cache.
L2CacheMissCount	Items	Count of fetch, write, atomic, and other instructions that miss the L2 cache.
MemUnitBusy	Percentage	The percentage of GPUTime the memory unit is active. The result includes the stall time (MemUnitStalled). This is measured with all extra fetches and writes and any cache or memory effects taken into account. Value range: 0% to 100% (fetch-bound).
MemUnitBusyCycles	Cycles	Number of GPU cycles the memory unit is active. The result includes the stall time (MemUnitStalledCycles). This is measured with all extra fetches and writes and any cache or memory effects taken into account.
MemUnitStalled	Percentage	The percentage of GPUTime the memory unit is stalled. Try reducing the number or size of fetches and writes if possible. Value range: 0% (optimal) to 100% (bad).
MemUnitStalledCycles	Cycles	Number of GPU cycles the memory unit is stalled.
WriteUnitStalled	Percentage	The percentage of GPUTime the Write unit is stalled. Value range: 0% to 100% (bad).
WriteUnitStalledCycles	Cycles	Number of GPU cycles the Write unit is stalled.
LocalVidMemBytes	Bytes	Number of bytes read from or written to local video memory
PcieBytes	Bytes	Number of bytes sent and received over the PCIe bus