chainer.backends.cuda.copy(array, out=None, out_device=None, stream=None)[source]

Copies a cupy.ndarray object using the default stream.

This function can copy the device array to the destination array on another device.

  • array (cupy.ndarray) – Array to be copied.

  • out (cupy.ndarray) – Destination array. If it is not None, then out_device argument is ignored.

  • out_device – Destination device specifier. Actual device object is obtained by passing this value to get_device().

  • stream (cupy.cuda.Stream) – CUDA stream.


Copied array.

If out is not specified, then the array is allocated on the device specified by out_device argument.

Return type