You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.9 KiB
89 lines
2.9 KiB
7 years ago
|
// 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.
|
||
|
|
|
||
|
|
#include "paddle/fluid/framework/details/ssa_graph_builder.h"
|
||
|
|
|
||
|
|
namespace paddle {
|
||
|
|
namespace framework {
|
||
|
|
namespace details {
|
||
|
|
void SSAGraphBuilder::PolishGraphToSupportDataHazards(SSAGraph *graph) {
|
||
|
|
for (auto &var_map : graph->vars_) {
|
||
|
|
for (auto &name_pair : var_map) {
|
||
|
|
if (name_pair.second.size() <= 1) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
auto it_new = name_pair.second.rbegin();
|
||
|
|
auto it_old = name_pair.second.rbegin();
|
||
|
|
++it_old;
|
||
|
|
for (; it_old != name_pair.second.rend(); it_new = it_old, ++it_old) {
|
||
|
|
auto *write_op = it_new->second.generated_op_;
|
||
|
|
auto &read_ops = it_old->second.pending_ops_;
|
||
|
|
auto *ex_write_op = it_old->second.generated_op_;
|
||
|
|
|
||
|
|
if (ex_write_op == nullptr) { // Nobody write this var.
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (auto *read_op : read_ops) {
|
||
|
|
// Manually add a dependency var from read_op to write_op;
|
||
|
|
if (read_op == write_op) {
|
||
|
|
// Read Write is the same op.
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
auto *dep_var = new DummyVarHandle();
|
||
|
|
read_op->AddOutput(dep_var);
|
||
|
|
write_op->AddInput(dep_var);
|
||
|
|
graph->dep_vars_.emplace(dep_var);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
VarHandle *SSAGraphBuilder::CreateOrGetLatestVarHandle(
|
||
|
|
SSAGraph *graph, const std::string &each_var_name,
|
||
|
|
const platform::Place &place, size_t place_offset) {
|
||
|
|
auto &var_holders = graph->vars_[place_offset];
|
||
|
|
auto &var_holder = var_holders[each_var_name];
|
||
|
|
VarHandle *var = nullptr;
|
||
|
|
if (var_holder.empty()) {
|
||
|
|
auto &init_var = var_holder[0];
|
||
|
|
init_var.place_ = place;
|
||
|
|
init_var.name_ = each_var_name;
|
||
|
|
init_var.generated_op_ = nullptr;
|
||
|
|
init_var.version_ = 0;
|
||
|
|
var = &init_var;
|
||
|
|
} else {
|
||
|
|
var = &var_holder.rbegin()->second;
|
||
|
|
}
|
||
|
|
return var;
|
||
|
|
}
|
||
|
|
|
||
|
|
void SSAGraphBuilder::CreateOpOutput(SSAGraph *graph, OpHandleBase *op_handle,
|
||
|
|
const std::string &each_var_name,
|
||
|
|
const platform::Place &place,
|
||
|
|
size_t place_offset) {
|
||
|
|
auto &vars = graph->vars_[place_offset][each_var_name];
|
||
|
|
size_t version = vars.size();
|
||
|
|
auto &var = vars[version];
|
||
|
|
var.version_ = version;
|
||
|
|
var.name_ = each_var_name;
|
||
|
|
var.place_ = place;
|
||
|
|
op_handle->AddOutput(&var);
|
||
|
|
}
|
||
|
|
} // namespace details
|
||
|
|
} // namespace framework
|
||
|
|
} // namespace paddle
|