diff --git a/demo-serving/op/bert_service_op.h b/demo-serving/op/bert_service_op.h
index 82c366237c2c263a85c2f7728301d8ec317594d3..ddc38b5612dfa570bc2d2669b8c35099b75515c2 100644
--- a/demo-serving/op/bert_service_op.h
+++ b/demo-serving/op/bert_service_op.h
@@ -25,6 +25,8 @@
 #endif
 #include "demo-serving/bert_service.pb.h"
 
+#include <sys/time.h>
+
 namespace baidu {
 namespace paddle_serving {
 namespace serving {
diff --git a/demo-serving/proto/bert_service.proto b/demo-serving/proto/bert_service.proto
index 3eba501317c2533ad8c02d79d5eca2dc6682a65e..4ba3c536d5e31492742a7ae43ee1e3bb13a3db14 100644
--- a/demo-serving/proto/bert_service.proto
+++ b/demo-serving/proto/bert_service.proto
@@ -25,8 +25,8 @@ message BertReqInstance {
   repeated int64 sentence_type_ids = 2;
   repeated int64 position_ids = 3;
   repeated float input_masks = 4;
-  required int64 max_seq_len = 5;
-  required int64 emb_size = 6;
+  optional int64 max_seq_len = 5;
+  optional int64 emb_size = 6;
 };
 
 message Request { repeated BertReqInstance instances = 1; };
diff --git a/sdk-cpp/proto/bert_service.proto b/sdk-cpp/proto/bert_service.proto
index 6d130fa3245d4111442fe12792203527af4813d1..fbf07e705985a336333984622a00007667d67dd3 100644
--- a/sdk-cpp/proto/bert_service.proto
+++ b/sdk-cpp/proto/bert_service.proto
@@ -25,7 +25,8 @@ message BertReqInstance {
   repeated int64 sentence_type_ids = 2;
   repeated int64 position_ids = 3;
   repeated float input_masks = 4;
-  required int64 max_seq_len = 5;
+  optional int64 max_seq_len = 5;
+  optional int64 emb_size = 6;
 };
 
 message Request { repeated BertReqInstance instances = 1; };
@@ -34,7 +35,11 @@ message Embedding_values { repeated float values = 1; };
 
 message BertResInstance { repeated Embedding_values instances = 1; };
 
-message Response { repeated BertResInstance instances = 1; };
+message Response {
+  repeated BertResInstance instances = 1;
+  optional int64 op_time = 2;
+  optional int64 infert_time = 3;
+};
 
 service BertService {
   rpc inference(Request) returns (Response);