add unit test for dist sparse l2 decay

python/paddle/fluid/tests/unittests/dist_ctr.py

@@ -30,7 +30,12 @@ fluid.default_main_program().random_seed = 1
 
 
 class TestDistCTR2x2(TestDistRunnerBase):
+    def config(self):
+        self.use_l2_decay = False
+
     def get_model(self, batch_size=2):
+        self.config()
+
         dnn_input_dim, lr_input_dim = dist_ctr_reader.load_data_meta()
         """ network definition """
         dnn_data = fluid.layers.data(
@@ -97,7 +102,13 @@ class TestDistCTR2x2(TestDistRunnerBase):
 
         inference_program = paddle.fluid.default_main_program().clone()
 
-        sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.0001)
+        regularization = None
+        if self.use_l2_decay:
+            regularization = fluid.regularizer.L2DecayRegularizer(
+                regularization_coeff=1e-3)
+
+        sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.0001,
+                                            regularization=regularization)
         sgd_optimizer.minimize(avg_cost)
 
         dataset = dist_ctr_reader.Dataset()

python/paddle/fluid/tests/unittests/dist_ctr_with_l2_decay.py

@@ -0,0 +1,27 @@
+#   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.
+
+from __future__ import print_function
+
+import dist_ctr
+from test_dist_base import runtime_main
+
+
+class TestDistCTRWithL2Decay(dist_ctr.TestDistCTR2x2):
+    def config(self):
+        self.use_l2_decay = True
+
+
+if __name__ == "__main__":
+    runtime_main(TestDistCTRWithL2Decay)

python/paddle/fluid/tests/unittests/test_dist_ctr.py

@@ -28,5 +28,15 @@ class TestDistCTR2x2(TestDistBase):
         self.check_with_place("dist_ctr.py", delta=1e-7, check_error_log=False)
 
 
+class TestDistCTR2x2WithL2Decay(TestDistBase):
+    def _setup_config(self):
+        self._sync_mode = True
+        self._enforce_place = "CPU"
+
+    def test_dist_ctr(self):
+        self.check_with_place(
+            "dist_ctr_with_l2_decay.py", delta=1e-7, check_error_log=False)
+
+
 if __name__ == "__main__":
     unittest.main()