gputools.py 文件源码

def laplace_gpu(y_gpu, mode='valid'):

  shape = np.array(y_gpu.shape).astype(np.uint32)
  dtype = y_gpu.dtype
  block_size = (16,16,1)
  grid_size = (int(np.ceil(float(shape[1])/block_size[0])),
               int(np.ceil(float(shape[0])/block_size[1])))
  shared_size = int((2+block_size[0])*(2+block_size[1])*dtype.itemsize)

  preproc = _generate_preproc(dtype, shape)
  mod = SourceModule(preproc + kernel_code, keep=True)

  if mode == 'valid':
    laplace_fun_gpu = mod.get_function("laplace_valid")
    laplace_gpu = cua.empty((y_gpu.shape[0]-2, y_gpu.shape[1]-2), y_gpu.dtype)

  if mode == 'same':
    laplace_fun_gpu = mod.get_function("laplace_same")
    laplace_gpu = cua.empty((y_gpu.shape[0], y_gpu.shape[1]), y_gpu.dtype)

  laplace_fun_gpu(laplace_gpu.gpudata, y_gpu.gpudata,
                  block=block_size, grid=grid_size, shared=shared_size)

  return laplace_gpu