59 lines
1.7 KiB
59 lines
1.7 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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#include "glog/logging.h"
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#include "paddle/fluid/memory/detail/memory_block.h"
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#include "paddle/fluid/platform/assert.h"
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namespace paddle {
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namespace memory {
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namespace detail {
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MetadataCache::MetadataCache(bool uses_gpu) : uses_gpu_(uses_gpu) {}
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MemoryBlock::Desc MetadataCache::load(const MemoryBlock* block) const {
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if (uses_gpu_) {
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auto existing_desc = cache_.find(block);
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PADDLE_ASSERT(existing_desc->second.check_guards());
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return existing_desc->second;
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} else {
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auto* desc = reinterpret_cast<const MemoryBlock::Desc*>(block);
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VLOG(10) << "Load MemoryBlock::Desc type=" << desc->type;
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PADDLE_ASSERT(desc->check_guards());
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return *reinterpret_cast<const MemoryBlock::Desc*>(block);
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}
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}
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void MetadataCache::save(MemoryBlock* block,
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const MemoryBlock::Desc& original_desc) {
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auto desc = original_desc;
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desc.update_guards();
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if (uses_gpu_) {
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cache_[block] = desc;
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} else {
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*reinterpret_cast<MemoryBlock::Desc*>(block) = desc;
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}
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}
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void MetadataCache::invalidate(MemoryBlock* block) {
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if (uses_gpu_) {
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cache_.erase(block);
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}
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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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