fix platform

fleetrec/core/model.py

 import abc
-
+from fleetrec.core.utils import envs
 
 class Model(object):
     """R
@@ -15,6 +15,7 @@ class Model(object):
         self._data_loader = None
         self._fetch_interval = 20
         self._namespace = "train.model"
+        self._platform = envs.get_platform()
 
     def get_inputs(self):
         return self._data_var

fleetrec/models/ctr/dnn/model.py

@@ -57,6 +57,8 @@ class Model(ModelBase):
             self._data_var.append(input)
 
         self._data_var.append(self.label_input)
+        
+        if self._platform != "LINUX":
             self._data_loader = fluid.io.PyReader(
                 feed_list=self._data_var, capacity=64, use_double_buffer=False, iterable=False)