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63 lines
2.2 KiB
63 lines
2.2 KiB
// Copyright (c) 2018 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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#include "paddle/fluid/framework/transfer_scope_cache.h"
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namespace paddle {
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namespace framework {
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// Holds all the transfer scope across the process.
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std::unordered_map<size_t, Scope*>& global_transfer_data_cache() {
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typedef std::unordered_map<size_t, Scope*> map_t;
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thread_local std::unique_ptr<map_t> x(new map_t);
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return *x;
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}
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// Holds all the transfer scope for this thread.
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std::unordered_set<Scope*>& global_transfer_scope_cache() {
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typedef std::unordered_set<Scope*> set_t;
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thread_local std::unique_ptr<set_t> x(new set_t);
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return *x;
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}
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// Try to create a transfer scope. If one cached scope has match the
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// requirement, just return that one.
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// Inputs:
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// @type0: the source kernel type.
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// @type1: the target kernel type.
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// @scope: the execution scope of this op.
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// Returns: A scope used to hold the transfer data across the different kernel
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// type.
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Scope* TryCreateTransferScope(OpKernelType type0, OpKernelType type1,
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const Scope* scope) {
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Scope* new_scope{nullptr};
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size_t infer_cache_key =
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CombineHash(OpKernelType::Hash()(type0), OpKernelType::Hash()(type1));
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infer_cache_key =
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CombineHash(infer_cache_key, std::hash<const Scope*>()(scope));
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auto it = global_transfer_data_cache().find(infer_cache_key);
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if (it != global_transfer_data_cache().end()) {
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new_scope = global_transfer_data_cache()[infer_cache_key];
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} else {
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new_scope = &scope->NewScope();
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global_transfer_data_cache()[infer_cache_key] = new_scope;
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}
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global_transfer_scope_cache().insert(new_scope);
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return new_scope;
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}
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} // namespace framework
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} // namespace paddle
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