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D3DDEVINFO_D3D9CACHEUTILIZATION structure

Measure the cache hit rate performance for textures and indexed vertices.

Syntax


typedef struct D3DDEVINFO_D3D9CACHEUTILIZATION {
  FLOAT TextureCacheHitRate;
  FLOAT PostTransformVertexCacheHitRate;
} D3DDEVINFO_D3D9CACHEUTILIZATION, *LPD3DDEVINFO_D3D9CACHEUTILIZATION;

Members

TextureCacheHitRate

Type: FLOAT

The hit rate for finding a texture in the texture cache. This assumes there is a texture cache. Increasing the level-of-detail bias to use the most detailed texture, using many large textures, or producing a near random texture access pattern on large textures with custom shader code can dramatically affect the texture cache hit rate.

PostTransformVertexCacheHitRate

Type: FLOAT

The hit rate for finding transformed vertices in the vertex cache. The GPU is designed to transform indexed vertices and may store them in a vertex cache. If you are using meshes, D3DXOptimizeFaces or D3DXOptimizeVertices may result in better vertex cache utilization.

Remarks

An efficient cache is typically closer to a 90 percent hit rate, and an inefficient cache is typically closer to a 10 percent hit rate (although a low percentage is not necessarily a problem).

Requirements

Header

D3D9Types.h

See also

GetData

 

 

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