mindspore.amp.auto_mixed_precision

mindspore.amp.auto_mixed_precision(network, amp_level='O0')

auto mixed precision function.

Parameters

• network (Cell) – Definition of the network.

• amp_level (str) –

  Supports [“O0”, “O1”, “O2”, “O3”]. Default: “O0”.

  • ”O0”: Do not change.

  • ”O1”: Cast the operators in white_list to float16, the remaining operators are kept in float32.

  • ”O2”: Cast network to float16, keep operators in black_list run in float32,

  • ”O3”: Cast network to float16.

Raises

ValueError – If amp level is not supported.

Examples

>>> from mindspore import amp, nn
>>> network = LeNet5()
>>> amp_level = "O1"
>>> net = amp.auto_mixed_precision(network, amp_level)