diff --git a/benchmark/cluster/vgg16/README.md b/benchmark/cluster/vgg16/README.md
index 725ce5902575b3239d05a43a368e68352d64904d..b0bdc0288f6dc5da6e3b10bf4eb21d8c268b48b8 100644
--- a/benchmark/cluster/vgg16/README.md
+++ b/benchmark/cluster/vgg16/README.md
@@ -48,6 +48,8 @@
 
 ### different pserver number
 
+*The performance gap between Fuild and v2 comes from the network interference.*
+
 - Trainer Count: 60
 - Batch Size: 128
 - Metrics: mini-batch / sec
@@ -55,7 +57,7 @@
 | PServer Count | 3 | 6 |10 | 20 |
 | -- | -- | -- | -- | -- |
 | PaddlePaddle Fluid | 589.1 | 592.6 | 656.4 | 655.8 |
-| PaddlePaddle v2 | - | - | 729.7 | - |
+| PaddlePaddle v2 | 593.4 | 791.3 | 729.7 | 821.7 |
 | TensorFlow | - | - | - | - |
 
 
diff --git a/benchmark/cluster/vgg16/v2_pserver.yaml b/benchmark/cluster/vgg16/v2_pserver.yaml
index 935cf0be3cdb0a2fd83e90c03c2240619c7c9b97..dd1271e0cf399184134c06b3200ee1202c65cef0 100644
--- a/benchmark/cluster/vgg16/v2_pserver.yaml
+++ b/benchmark/cluster/vgg16/v2_pserver.yaml
@@ -29,7 +29,7 @@ spec:
         - name: TOPOLOGY
           value: ""
         - name: ENTRY
-          value: "python -u train.py"
+          value: "python train.py"
         - name: TRAINER_PACKAGE
           value: "/workspace"
         - name: PADDLE_INIT_PORT
diff --git a/benchmark/cluster/vgg16/v2_trainer.yaml b/benchmark/cluster/vgg16/v2_trainer.yaml
index 5189009f3e1c5dafe2900b7dce4553a39e951d60..997bbc81c99ae642271b3ed4c5c141a5dfc5148a 100644
--- a/benchmark/cluster/vgg16/v2_trainer.yaml
+++ b/benchmark/cluster/vgg16/v2_trainer.yaml
@@ -30,7 +30,7 @@ spec:
         - name: TOPOLOGY
           value: ""
         - name: ENTRY
-          value: "cd /workspace && MKL_NUM_THREADS=1 python -u /workspace/vgg16_v2.py"
+          value: "cd /workspace && MKL_NUM_THREADS=1 python /workspace/vgg16_v2.py"
         - name: TRAINER_PACKAGE
           value: "/workspace"
         - name: PADDLE_INIT_PORT