This is GPU terminology: https://cvw.cac.cornell.edu/gpu-architecture/gpu-characteristics/kernel_sm https://cvw.cac.cornell.edu/gpu-architecture/gpu-characteri

This is GPU terminology: https://cvw.cac.cornell.edu/gpu-architecture/gpu-characteristics/kernel_sm https://cvw.cac.cornell.edu/gpu-architecture/gpu-characteris... A function that is meant to be executed in parallel on an attached GPU is called a kernel. In CUDA, a kernel is usually identified by the presence of the __global__ specifier in front of an otherwise normal-looking C++ function declaration.