38 lines
884 B
38 lines
884 B
#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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// TODO: fix it with align aware allocator bind to Tensor
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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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const char* SerializeState(int* state_len);
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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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