update train.py and benchmark (#374)

* update train.py

* update benchmark

dygraph/benchmark/deeplabv3p.py

@@ -96,7 +96,7 @@ def parse_args():
         dest='save_interval_iters',
         help='The interval iters for save a model snapshot',
         type=int,
-        default=5)
+        default=1000)
     parser.add_argument(
         '--save_dir',
         dest='save_dir',

dygraph/benchmark/hrnet.py

@@ -96,7 +96,7 @@ def parse_args():
         dest='save_interval_iters',
         help='The interval iters for save a model snapshot',
         type=int,
-        default=5)
+        default=1000)
     parser.add_argument(
         '--save_dir',
         dest='save_dir',

dygraph/core/train.py

@@ -17,7 +17,8 @@ import os
 import paddle.fluid as fluid
 from paddle.fluid.dygraph.parallel import ParallelEnv
 from paddle.fluid.io import DataLoader
-from paddle.incubate.hapi.distributed import DistributedBatchSampler
+# from paddle.incubate.hapi.distributed import DistributedBatchSampler
+from paddle.io import DistributedBatchSampler
 
 import dygraph.utils.logger as logger
 from dygraph.utils import load_pretrained_model