Compute Shader Thread Number Restriction

The situation is the following:

I have a kernel:

Code (CSharp):

1. #pragma kernel diffga
2. [numthreads(16, 8, 1)]
3. void diffga(uint3 id : SV_DispatchThreadID) {
4.    /* code here */
5. }

I dispatch this kernel with the following:

Code (CSharp):

1. _shader.Dispatch(kidiffga, 8, 16, 1)

If I capture the values of id.x and id.y, id.y ranges from 0:31 as expected. However id.x only ranges from 0:7. If I change numthreads and dispatch such that the expected range is less than 8 then it functions fine. However any configuration of numthreads and dispatch which requires a range of greater than 8 is capped.

Any insight as to why this is the case would be much appreciated.

 

I've managed to locate the problem. It arose from an incorrect value for the stride parameter when istantiating the ComputeBuffer for the kernel.