Add demo for recordio train/test and parallel executor

paddle/fluid/framework/details/threaded_ssa_graph_executor.cc

@@ -140,7 +140,9 @@ FeedFetchList ThreadedSSAGraphExecutor::Run(
 
     if (timeout) {
       if (exception_) {
-        throw * exception_;
+        auto exp = *exception_;
+        exception_.reset();
+        throw exp;
       } else {
         continue;
       }

paddle/fluid/framework/parallel_executor.cc

@@ -74,7 +74,7 @@ ParallelExecutor::ParallelExecutor(
     member_->own_local_scope = false;
     PADDLE_ENFORCE_EQ(member_->places_.size(), local_scopes.size());
     for (size_t i = 0; i < member_->places_.size(); ++i) {
-      member_->local_scopes_.emplace_back(local_scopes[i]);
+      member_->local_scopes_.emplace_back(&local_scopes[i]->NewScope());
     }
   }
 

paddle/fluid/operators/reader/create_threaded_reader_op.cc

@@ -21,26 +21,16 @@ namespace reader {
 
 class ThreadedReader : public framework::DecoratedReader {
  public:
-  ThreadedReader(ReaderBase* reader, bool safe_mode)
-      : DecoratedReader(reader), safe_mode_(safe_mode) {}
+  explicit ThreadedReader(ReaderBase* reader) : DecoratedReader(reader) {}
 
   void ReadNext(std::vector<framework::LoDTensor>* out) override {
     std::lock_guard<std::mutex> lock(mutex_);
     reader_->ReadNext(out);
   }
 
-  void ReInit() override {
-    if (safe_mode_) {
-      PADDLE_THROW(
-          "ThreadedReader::ReInit() is disabled when 'safe_mode' is true.");
-    }
-    VLOG(5) << "ThreadedReader::ReInit() is invoked! It might be buggy in "
-               "multi-thread environment.";
-    reader_->ReInit();
-  }
+  void ReInit() override { reader_->ReInit(); }
 
  private:
-  bool safe_mode_;
   std::mutex mutex_;
 };
 
@@ -58,8 +48,7 @@ class CreateThreadedReaderOp : public framework::OperatorBase {
     }
     const auto& underlying_reader = scope.FindVar(Input("UnderlyingReader"))
                                         ->Get<framework::ReaderHolder>();
-    bool safe_mode = Attr<bool>("safe_mode");
-    out->Reset(new ThreadedReader(underlying_reader.Get(), safe_mode));
+    out->Reset(new ThreadedReader(underlying_reader.Get()));
   }
 };
 
@@ -67,10 +56,6 @@ class CreateThreadedReaderOpMaker : public DecoratedReaderMakerBase {
  public:
   CreateThreadedReaderOpMaker(OpProto* op_proto, OpAttrChecker* op_checker)
       : DecoratedReaderMakerBase(op_proto, op_checker) {
-    AddAttr<bool>("safe_mode",
-                  "When 'safe_mode' is true, 'ReInit()' is disabled to avoid "
-                  "unexpected bugs in multi-thread environment.")
-        .SetDefault(true);
     AddComment(R"DOC(
       CreateThreadedReader Operator
 

python/paddle/fluid/layers/io.py

@@ -457,8 +457,8 @@ def __create_shared_decorated_reader__(op_type, reader, attrs):
     return monkey_patch_reader_methods(main_prog_var)
 
 
-def __create_unshared_decorated_reader__(op_type, reader, attrs):
-    new_reader_name = unique_name(op_type)
+def __create_unshared_decorated_reader__(op_type, reader, attrs, name=None):
+    new_reader_name = name if name is not None else unique_name(op_type)
     main_blk = default_main_program().current_block()
     new_reader = main_blk.create_var(name=new_reader_name)
     main_blk.append_op(
@@ -481,12 +481,12 @@ def batch(reader, batch_size):
         'create_batch_reader', reader, {'batch_size': int(batch_size)})
 
 
-def double_buffer(reader, place=None):
+def double_buffer(reader, place=None, name=None):
     attrs = dict()
     if place is not None:
         attrs['place'] = str(place).upper()
-    return __create_unshared_decorated_reader__('create_double_buffer_reader',
-                                                reader, attrs)
+    return __create_unshared_decorated_reader__(
+        'create_double_buffer_reader', reader, attrs, name=name)
 
 
 def multi_pass(reader, pass_num):

python/paddle/fluid/tests/demo/text_classification/.gitignore

+*.recordio

python/paddle/fluid/tests/demo/text_classification/convert_data_to_recordio.py

+#   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.
+
+import sys
+import paddle.fluid as fluid
+import paddle.v2 as paddle
+
+
+def load_vocab(filename):
+    """
+    load vocabulary
+    """
+    vocab = {}
+    with open(filename) as f:
+        wid = 0
+        for line in f:
+            vocab[line.strip()] = wid
+            wid += 1
+    return vocab
+
+
+# load word dict with paddle inner function
+word_dict = load_vocab(sys.argv[1])
+word_dict["<unk>"] = len(word_dict)
+print "Dict dim = ", len(word_dict)
+
+# input text data
+data = fluid.layers.data(name="words", shape=[1], dtype="int64", lod_level=1)
+
+# label data
+label = fluid.layers.data(name="label", shape=[1], dtype="int64")
+# like placeholder
+feeder = fluid.DataFeeder(feed_list=[data, label], place=fluid.CPUPlace())
+
+# train data set
+BATCH_SIZE = 128
+train_reader = paddle.batch(
+    paddle.reader.shuffle(
+        paddle.dataset.imdb.train(word_dict), buf_size=10000),
+    batch_size=BATCH_SIZE)
+
+test_reader = paddle.batch(
+    paddle.dataset.imdb.test(word_dict), batch_size=BATCH_SIZE)
+
+fluid.recordio_writer.convert_reader_to_recordio_file(
+    "train.recordio", feeder=feeder, reader_creator=train_reader)
+fluid.recordio_writer.convert_reader_to_recordio_file(
+    "test.recordio", feeder=feeder, reader_creator=test_reader)

python/paddle/fluid/tests/demo/text_classification/train.py

+#   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.
+
+import paddle.fluid as fluid
+import numpy
+import sys
+
+TRAIN_FILES = ['train.recordio']
+TEST_FILES = ['test.recordio']
+
+DICT_DIM = 89528
+
+# embedding dim
+emb_dim = 128
+
+# hidden dim
+hid_dim = 128
+
+# hidden dim2
+hid_dim2 = 96
+
+# class num
+class_dim = 2
+
+
+def network_cfg(is_train, pass_num=100):
+    with fluid.unique_name.guard():
+        train_file_obj = fluid.layers.open_files(
+            filenames=TRAIN_FILES,
+            pass_num=pass_num,
+            shapes=[[-1, 1], [-1, 1]],
+            lod_levels=[1, 0],
+            dtypes=['int64', 'int64'],
+            thread_num=1)
+
+        test_file_obj = fluid.layers.open_files(
+            filenames=TEST_FILES,
+            pass_num=1,
+            shapes=[[-1, 1], [-1, 1]],
+            lod_levels=[1, 0],
+            dtypes=['int64', 'int64'],
+            thread_num=1)
+
+        if is_train:
+            file_obj = fluid.layers.shuffle(train_file_obj, buffer_size=1000)
+        else:
+            file_obj = test_file_obj
+
+        file_obj = fluid.layers.double_buffer(
+            file_obj,
+            name="train_double_buffer" if is_train else 'test_double_buffer')
+
+        data, label = fluid.layers.read_file(file_obj)
+
+        emb = fluid.layers.embedding(input=data, size=[DICT_DIM, emb_dim])
+
+        # sequence conv with window size = 3
+        win_size = 3
+        conv_3 = fluid.nets.sequence_conv_pool(
+            input=emb,
+            num_filters=hid_dim,
+            filter_size=win_size,
+            act="tanh",
+            pool_type="max")
+
+        # fc layer after conv
+        fc_1 = fluid.layers.fc(input=[conv_3], size=hid_dim2)
+
+        # probability of each class
+        prediction = fluid.layers.fc(input=[fc_1],
+                                     size=class_dim,
+                                     act="softmax")
+        # cross entropy loss
+        cost = fluid.layers.cross_entropy(input=prediction, label=label)
+
+        # mean loss
+        avg_cost = fluid.layers.mean(x=cost)
+        acc = fluid.layers.accuracy(input=prediction, label=label)
+
+        if is_train:
+            # SGD optimizer
+            sgd_optimizer = fluid.optimizer.Adagrad(learning_rate=0.01)
+            sgd_optimizer.minimize(avg_cost)
+
+        return {
+            'loss': avg_cost,
+            'log': [avg_cost, acc],
+            'file': train_file_obj if is_train else test_file_obj
+        }
+
+
+def main():
+    train = fluid.Program()
+    startup = fluid.Program()
+
+    with fluid.program_guard(train, startup):
+        train_args = network_cfg(is_train=True)
+
+    test = fluid.Program()
+
+    with fluid.program_guard(test, fluid.Program()):
+        test_args = network_cfg(is_train=False)
+
+    # startup
+    place = fluid.CUDAPlace(0)
+    exe = fluid.Executor(place=place)
+    exe.run(startup)
+
+    train_exe = fluid.ParallelExecutor(
+        use_cuda=True, loss_name=train_args['loss'].name, main_program=train)
+
+    fetch_var_list = [var.name for var in train_args['log']]
+    for i in xrange(sys.maxint):
+        result = map(numpy.array,
+                     train_exe.run(fetch_list=fetch_var_list
+                                   if i % 1000 == 0 else []))
+        if len(result) != 0:
+            print 'Train: ', result
+
+        if i % 1000 == 0:
+            test_exe = fluid.ParallelExecutor(
+                use_cuda=True, main_program=test, share_vars_from=train_exe)
+            loss = []
+            acc = []
+            try:
+                while True:
+                    loss_np, acc_np = map(
+                        numpy.array, test_exe.run(fetch_list=fetch_var_list))
+                    loss.append(loss_np[0])
+                    acc.append(acc_np[0])
+            except:
+                test_args['file'].reset()
+                print 'TEST: ', numpy.mean(loss), numpy.mean(acc)
+
+
+if __name__ == '__main__':
+    main()