D3DDEVINFO_D3D9CACHEUTILIZATION

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

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

Members

TextureCacheHitRate

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

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).

See Also

IDirect3DQuery9::GetData