Built-in variables
threadIdx
: thread index within Block
blockIdx
: block index within Grid
blockDim
: thread shape
GridDim
: grid shape
global array id = blockIdx.x * blockDim.x + threadIdx.x
threadIdx
: thread index within Block
blockIdx
: block index within Grid
blockDim
: thread shape
GridDim
: grid shape
global array id = blockIdx.x * blockDim.x + threadIdx.x