dist_multi_trainer.cc 2.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/* Copyright (c) 2016 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 <string>
#include <vector>
#include "paddle/fluid/framework/data_feed_factory.h"
D
dongdaxiang 已提交
18
#include "paddle/fluid/framework/data_set.h"
19 20 21 22 23 24
#include "paddle/fluid/framework/device_worker_factory.h"
#include "paddle/fluid/framework/trainer.h"

namespace paddle {
namespace framework {

D
dongdaxiang 已提交
25
void DistMultiTrainer::Initialize(const TrainerDesc& trainer_desc,
26
                                  Dataset* dataset) {
27
  thread_num_ = trainer_desc.thread_num();
28
  SetDataset(dataset);
D
dongdaxiang 已提交
29

J
jiaqi 已提交
30
  const std::vector<paddle::framework::DataFeed*> readers =
31
      dataset->GetReaders();
32

33 34 35
  thread_num_ = readers.size();
  workers_.resize(thread_num_);

36 37 38 39
  for (int i = 0; i < thread_num_; ++i) {
    workers_[i] = DeviceWorkerFactory::CreateDeviceWorker(
        trainer_desc.device_worker_name());
    workers_[i]->SetDeviceIndex(i);
D
dongdaxiang 已提交
40
    workers_[i]->SetDataFeed(readers[i]);
41
    workers_[i]->Initialize(trainer_desc);
42 43
  }

D
dongdaxiang 已提交
44
  VLOG(3) << "going to initialize pull dense worker";
45 46
  pull_dense_worker_ = PullDenseWorker::GetInstance();
  pull_dense_worker_->Initialize(trainer_desc);
D
dongdaxiang 已提交
47
  VLOG(3) << "initialize pull dense worker";
48
  SetDebug(trainer_desc.debug());
49 50 51
}

void DistMultiTrainer::InitOtherEnv(const ProgramDesc& main_program) {
52
  pull_dense_worker_->SetRootScope(root_scope_);
53
  pull_dense_worker_->Start();
D
dongdaxiang 已提交
54
  VLOG(3) << "init other env done.";
55 56
}

57 58 59 60 61 62 63 64 65 66 67 68
void DistMultiTrainer::Run() {
  for (int thidx = 0; thidx < thread_num_; ++thidx) {
    if (!debug_) {
      threads_.push_back(
          std::thread(&DeviceWorker::TrainFiles, workers_[thidx].get()));
    } else {
      threads_.push_back(std::thread(&DeviceWorker::TrainFilesWithProfiler,
                                     workers_[thidx].get()));
    }
  }
}

69 70 71 72 73
void DistMultiTrainer::Finalize() {
  for (auto& th : threads_) {
    th.join();
  }
  pull_dense_worker_->Stop();
74
  root_scope_->DropKids();
75 76 77 78
}

}  // end namespace framework
}  // end namespace paddle