Overview#
gr__busy_pct signal on the graph. High percentage => GPU bound
Range Profiler#
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Finding most expensive drawcall: Capture frame and click action details in range info section. Sort table by draw call times
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Optimize range of draw calls: Pipeline section in Range details shows virtual GPU pipeline. Red bars indicate unused GPU units
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Draw calls common state: Range profiler's grouping capability to make new ranges based on common state
| IA Bottleneck & SOL | IA is the unit that handles vertex attribute assembly |
|---|---|
| FB Bottleneck & SOL | The FB or frame buffer unit handles all requests for reading memory that missed any possible L1/L2 caches. |
| Primitive Setup Bottleneck & SOL | Primitive setup happens right before rasterization and handles jobs like edge equation calculations |
|---|---|
| Rasterization Bottleneck & SOL | Rasterization is when the primitives are split up into individual fragments to be shaded. |
| ROP Bottleneck & SOL | ROP is the blending unit and handles both color blending and Z/stencil buffer handling. |
| SHD Bottleneck & SOL | SHD (or SM) is the unified shader unit and handles processing of all shader types on various inputs. |
| Stream Out Bottleneck & SOL | Stream out is the unit responsible for optionally writing data output from the geometry shader to memory |
| Tessellator SOL | Tessellator is the unit between the hull and domain shaders. This SOL does not include the shader. |
| TEX Bottleneck & SOL | The TEX unit is responsible for reading samples from the L2 and frame buffer and calculating the texel value based on the current filtering mode.** |
| ZCull Bottleneck & SOL | ZCull happens before the fragment shader is run and is able to discard fragments because they won’t pass the z-test. |