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97 lines
2.9 KiB
97 lines
2.9 KiB
4 years ago
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// 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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// limitations under the License.
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#pragma once
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#include <functional>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "paddle/fluid/framework/executor.h"
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#include "paddle/fluid/framework/program_desc.h"
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#include "paddle/fluid/platform/macros.h"
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namespace paddle {
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namespace framework {
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class ExecutorInfoCache {
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public:
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/*
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* The ExecutorPrepareContext is different while running forward program and
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* backward program. We add bool value into cached key to distinguish this.
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*/
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using KeyType = std::pair<const framework::ProgramDesc*, /*is_grad*/ bool>;
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struct HashPair {
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template <class T1, class T2>
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size_t operator()(const std::pair<T1, T2>& p) const noexcept {
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size_t seed = 10;
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hash_combine(&seed, p.first);
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hash_combine(&seed, p.second);
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return seed;
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}
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template <typename T>
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void hash_combine(size_t* seed, const T& val) const {
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std::hash<T> hasher;
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(*seed) ^= hasher(val) + 0x9e3779b9 + ((*seed) << 6) + ((*seed >> 2));
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}
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};
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static ExecutorInfoCache& Instance();
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std::shared_ptr<framework::ExecutorPrepareContext> Get(
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const KeyType& key) const {
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PADDLE_ENFORCE_EQ(
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Has(key), true,
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platform::errors::NotFound(
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"(programDesc: %s, is_grad: %s) doesn't exist in ExecutorInfoCache",
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key.first, key.second));
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return info_map_.at(key);
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}
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bool Has(const KeyType& key) const {
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return info_map_.find(key) != info_map_.end();
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}
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void Insert(const KeyType& key,
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std::shared_ptr<framework::ExecutorPrepareContext> exe_ctx) {
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PADDLE_ENFORCE_NE(
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Has(key), true,
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platform::errors::NotFound(
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"(programDesc: %s, is_grad: %s) has existed in ExecutorInfoCache",
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key.first, key.second));
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info_map_.insert(std::make_pair(key, exe_ctx));
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}
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private:
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ExecutorInfoCache() = default;
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std::unordered_map<
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KeyType, std::shared_ptr<framework::ExecutorPrepareContext>, HashPair>
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info_map_;
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DISABLE_COPY_AND_ASSIGN(ExecutorInfoCache);
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};
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std::shared_ptr<framework::ExecutorPrepareContext> GetExecutorInfoFromCache(
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const framework::Executor& exe, const framework::ExecutionContext& ctx,
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const std::vector<std::vector<std::string>>& ctx_output_names,
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bool is_grad);
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} // namespace framework
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} // namespace paddle
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