multi_devices_helper.h 1.7 KB
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//   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

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#include <memory>
#include <string>
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#include <vector>
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#include "paddle/fluid/framework/details/op_handle_base.h"
#include "paddle/fluid/framework/details/var_handle.h"

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#include "paddle/fluid/framework/program_desc.h"
#include "paddle/fluid/platform/place.h"

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#include "paddle/fluid/framework/ir/graph.h"
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#include "paddle/fluid/framework/ir/pass.h"
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namespace paddle {
namespace framework {
namespace details {

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// all variable in each devices.
// The outside vector is the device vector. Each element of this vector is a
// map from variable name to variables. The variables, who have the same name,
// will have a differsent version. The offset in the
// `std::vector<std::unique_ptr<VarHandle>>` is the version of varaibles.
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typedef std::vector<std::unordered_map<std::string, std::vector<VarHandle*>>>
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    GraphVars;
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const char kGraphVars[] = "vars";
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// aux variables to represent dependency. Useful to resolve data hazard.
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typedef std::unordered_set<VarHandleBase*> GraphDepVars;
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const char kGraphDepVars[] = "dep_vars";
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}  // namespace details
}  // namespace framework
}  // namespace paddle