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68 lines
2.8 KiB
68 lines
2.8 KiB
# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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import paddle.fluid.contrib.mixed_precision as mixed_precision
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from .meta_optimizer_base import MetaOptimizerBase
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class AMPOptimizer(MetaOptimizerBase):
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def __init__(self, optimizer):
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super(AMPOptimizer, self).__init__(optimizer)
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self.inner_opt = optimizer
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self.amp_opt = None
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# we do not allow meta optimizer to be inner optimizer currently
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self.meta_optimizers_white_list = [
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"LarsOptimizer", "LambOptimizer", "RecomputeOptimizer",
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"LocalSGDOptimizer", "GradientMergeOptimizer",
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"GraphExecutionOptimizer"
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]
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self.meta_optimizers_black_list = ["DGCOptimizer"]
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def _set_basic_info(self, loss, role_maker, user_defined_optimizer,
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user_defined_strategy):
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super(AMPOptimizer, self)._set_basic_info(
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loss, role_maker, user_defined_optimizer, user_defined_strategy)
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def _can_apply(self):
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if self.user_defined_strategy.amp:
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return True
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return False
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def _disable_strategy(self, dist_strategy):
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dist_strategy.amp = False
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dist_strategy.amp_configs = {}
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def minimize_impl(self,
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loss,
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startup_program=None,
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parameter_list=None,
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no_grad_set=None):
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if self.amp_opt is None:
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config = self.user_defined_strategy.amp_configs
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custom_white_list = set(config['custom_white_list'])
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custom_black_list = set(config['custom_black_list'])
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custom_black_varnames = set(config['custom_black_varnames'])
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amp_lists = mixed_precision.AutoMixedPrecisionLists(
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custom_white_list, custom_black_list, custom_black_varnames)
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self.amp_opt = mixed_precision.decorate(
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self.inner_opt, amp_lists, config['init_loss_scaling'],
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config['incr_every_n_steps'], config['decr_every_n_nan_or_inf'],
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config['incr_ratio'], config['decr_ratio'],
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config['use_dynamic_loss_scaling'])
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optimize_ops, params_grads = \
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self.amp_opt.minimize(loss, startup_program,
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parameter_list, no_grad_set)
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return optimize_ops, params_grads
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