51 lines
1.4 KiB
51 lines
1.4 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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limitations under the License. */
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#pragma once
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#include "parameter_optimizer.h"
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namespace paddle {
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namespace optimizer {
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class SGDOptimizer : public ParameterOptimizer {
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public:
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SGDOptimizer(Tensor* parameter, LrPolicy* lr, double m, double d, bool n)
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: ParameterOptimizer(parameter, lr),
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momentums_(nullptr),
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momentum_(m),
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decay_(d),
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nesterov_(n) {
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if (momentum_ != 0.0) {
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size_t size = parameter->size();
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momentums_ = new Tensor(size);
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}
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}
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virtual ~SGDOptimizer() {
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if (momentums_) delete momentums_;
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}
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void Update(const Tensor* gradient);
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std::string SerializeState();
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void DeserializeState(const std::string& state);
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private:
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Tensor* momentums_;
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double momentum_;
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double decay_;
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bool nesterov_;
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};
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} // namespace optimizer
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} // namespace paddle
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