Metal Thread Layout Visualizer

Some Nomenclature

NVIDIA: 32 threads per warp - threads execute in lockstep with same instruction

AMD: 64 threads per wavefront (32 on RDNA) - similar to NVIDIA but larger groups

Apple Silicon: 32 threads per SIMD group

Dispatch Mode

Threadgroup Width 8

Threadgroup Height 1

Grid Width 1

Grid Height 1

SIMD Size

Thread Grid Layout

Threadgroup Boundary

SIMD Group Boundary (32 threads execute in lockstep)

Quad Group Boundary (4 threads for fragment derivatives)

Thread Details

Click on a thread to see details

Total Threads: -

Threads per Threadgroup: -

SIMD Groups per Threadgroup: -

Quad Groups per Threadgroup: -