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Appendix C: EGL Perfmon Counters

Counter Names	Description
`EXPERIMENT VERTEX COUNT`	How many vertex have been drawn.
`EXPERIMENT VERTEX TRANSFORM COUNT`	How many vertex have been transformed or go through the vertex pipeline.
`EXPERIMENT DEGENERATE PRIMITIVES`	How many degenerated primitives are there in the draw call. Degenerated primitives are checked by equal indices of the primitive not the vertex data.
`EXPERIMENT CULLED PRIMITIVES`	How many primitives are culled.
`EXPERIMENT CLIPPED PRIMITIVES`	How many primitives are clipped.
`EXPERIMENT ACCEPTED PRIMITIVES`	How many primitives have finished the vertex pipeline and are accepted by the rasterizer.
`EXPERIMENT CLIP GENERATED PRIMITIVES`	How many new primitives are generated by clipping.
`EXPERIMENT REJECTED PRIMITIVES`	How many primitives are rejected by the vertex pipeline.
`EXPERIMENT EARLY REJECTED FRAGMENTS`	How many fragments are early rejected, either by the depth test or the stencil test.
`EXPERIMENT REJECTED FRAGMENTS`	How many fragments are rejected in the fragment pipeline, due to either depth test or stencil test failure.
`EXPERIMENT DISCARDED FRAGMENTS`	How many fragments are discarded by "discard" instructions in the fragment shader.
`EXPERIMENT ACCEPTED FRAGMENTS`	How many fragments have finished the fragment pipeline and write to the frame buffer.
`EXPERIMENT VERTEX CACHE MISS RATE`	Percentage for vertex cache miss / total vertex cache access.
`EXPERIMENT ATTRIBUTE CACHE MISS RATE`	Percentage for attribute cache miss / total attribute cache access.
`EXPERIMENT TEXTURE CACHE MISS RATE`	Percentage for texture cache miss / total texture cache access.
`EXPERIMENT GPU IDLE`	Percentage for how long the GPU is idle / how long the GPU has been alive since the last sampling.
`EXPERIMENT INDEX MEMORY ACCESS`	How many bytes of index memory are accessed.
`EXPERIMENT ATTRIBUTE MEMORY ACCESS`	How many bytes of attribute memory are accessed.
`EXPERIMENT TEXTURE MEMORY ACCESS`	How many bytes of texture memory are accessed.
`EXPERIMENT OTHER READ MEMORY ACCESS`	How many bytes of other memory are requested for reading.
`EXPERIMENT OTHER WRITE MEMORY ACCESS`	How many bytes of other memory are requested for writing.
`EXPERIMENT RENDER TIME`	How many milliseconds (ms) are elapsed for rendering.
`EXPERIMENT INDEX MEMORY STALL`	How many milliseconds (ms) are elapsed for memory stall.
`EXPERIMENT ATTRIBUTE MEMORY STALL`	How many milliseconds (ms) are elapsed for attribute memory stall.
`EXPERIMENT DEPTH MEMORY STALL`	How many milliseconds (ms) are elapsed for depth memory stall.
`EXPERIMENT STENCIL MEMORY STALL`	How many milliseconds (ms) are elapsed for stencil memory stall.
`EXPERIMENT TEXTURE MEMORY STALL`	How many milliseconds (ms) are elapsed for texture memory stall.
`EXPERIMENT FRAGMENT READ MEMORY STALL`	How many milliseconds (ms) are elapsed for fragment stage memory read stall.
`EXPERIMENT FRAGMENT WRITE MEMORY STALL`	How many milliseconds (ms) are elapsed for fragment stage memory write stall.
`EXPERIMENT INDEX DOWNSTREAM STALL`	How many milliseconds (ms) are elapsed for index downstream stall.
`EXPERIMENT VERTEX DOWNSTREAM STALL`	How many milliseconds (ms) are elapsed for vertex downstream stall.
`EXPERIMENT PRIMITIVE DOWNSTREAM STALL`	How many milliseconds (ms) are elapsed for primitive downstream stall.
`EXPERIMENT FRAGMENT DOWNSTREAM STALL`	How many milliseconds (ms) are elapsed for fragment downstream stall.