| # coding=utf-8 | |
| # Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved. | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| """For backward compatibility, we need the class definitions to deserialize.""" | |
| class LossScaler: | |
| def __init__(self, scale=1): | |
| self.cur_scale = scale | |
| class DynamicLossScaler: | |
| def __init__(self, | |
| init_scale=2**32, | |
| scale_factor=2., | |
| scale_window=1000, | |
| min_scale=1, | |
| delayed_shift=1, | |
| consecutive_hysteresis=False): | |
| self.cur_scale = init_scale | |
| self.cur_iter = 0 | |
| self.last_overflow_iter = -1 | |
| self.scale_factor = scale_factor | |
| self.scale_window = scale_window | |
| self.min_scale = min_scale | |
| self.delayed_shift = delayed_shift | |
| self.cur_hysteresis = delayed_shift | |
| self.consecutive_hysteresis = consecutive_hysteresis | |