Yi Wang
7 years ago
parent
544254fe4f
commit
402a9f1f24
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/* 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 "paddle/fluid/memory/detail/memory_block.h"
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#include "paddle/fluid/memory/detail/meta_data.h"
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#include <unordered_map>
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namespace paddle {
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namespace memory {
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namespace detail {
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/**
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* \brief A cache for accessing memory block meta-data that may be expensive
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* to access directly.
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*
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* \note This class exists to unify the metadata format between GPU and CPU
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* allocations. It should be removed when the CPU can access all GPU
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* allocations directly via UVM.
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*/
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class MetadataCache {
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public:
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explicit MetadataCache(bool uses_gpu);
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public:
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/*! \brief Load the associated metadata for the specified memory block. */
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Metadata load(const MemoryBlock* memory_block);
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/*! \brief Store the associated metadata for the specified memory block. */
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void store(MemoryBlock* memory_block, const Metadata& meta_data);
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/*! \brief Indicate that the specified metadata will no longer be used. */
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void invalidate(MemoryBlock* memory_block);
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public:
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MetadataCache(const MetadataCache&) = delete;
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MetadataCache& operator=(const MetadataCache&) = delete;
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private:
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bool uses_gpu_;
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private:
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typedef std::unordered_map<const MemoryBlock*, Metadata> MetadataMap;
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private:
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MetadataMap cache_;
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};
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} // namespace detail
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} // namespace memory
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} // namespace paddle
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@ -1,54 +0,0 @@
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/* 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 "paddle/fluid/memory/detail/memory_block.h"
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#include <stddef.h>
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namespace paddle {
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namespace memory {
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namespace detail {
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class Metadata {
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public:
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Metadata(MemoryBlock::Type t, size_t i, size_t s, size_t ts, MemoryBlock* l,
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MemoryBlock* r);
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Metadata();
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public:
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/*! \brief Update the guards when metadata is changed */
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void update_guards();
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/*! \brief Check consistency to previous modification */
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bool check_guards() const;
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public:
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// TODO(gangliao): compress this
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// clang-format off
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size_t guard_begin = 0;
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MemoryBlock::Type type = MemoryBlock::INVALID_CHUNK;
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size_t index = 0;
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size_t size = 0;
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size_t total_size = 0;
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MemoryBlock* left_buddy = nullptr;
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MemoryBlock* right_buddy = nullptr;
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size_t guard_end = 0;
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// clang-format on
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};
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} // namespace detail
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} // namespace memory
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} // namespace paddle
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