diff --git a/paddle/parameter/ParameterUpdaterBase.h b/paddle/parameter/ParameterUpdaterBase.h
index 88148d9b769e9b6eca90f9651a121e926543d7c2..b230e170c15f1b004c5357fb7d0ad2204d01f44b 100644
--- a/paddle/parameter/ParameterUpdaterBase.h
+++ b/paddle/parameter/ParameterUpdaterBase.h
@@ -38,7 +38,7 @@ public:
   virtual void startPass() {}
 
   // called by Trainer then finishing a pass, ruturn true if pass accepted
-  virtual bool finishPass(real cost = 0) { return true; }
+  virtual bool finishPass() { return true; }
 
   // called by Trainer before backward() of a batch
   // Return the type of pass it needs. This pass type will be passed
@@ -112,9 +112,9 @@ public:
         [&](int tid, size_t numThreads) { updaters_[tid]->startPass(); });
   }
 
-  virtual bool finishPass(real cost = 0) {
+  virtual bool finishPass() {
     syncThreadPool_->execPlusOwner(
-        [&](int tid, size_t numThreads) { updaters_[tid]->finishPass(cost); });
+        [&](int tid, size_t numThreads) { updaters_[tid]->finishPass(); });
     return true;
   }
 
diff --git a/paddle/trainer/ParameterUpdater.h b/paddle/trainer/ParameterUpdater.h
index 4dae77567f8f4d097c583567275d4b90122feb6a..c3207e63ce72b73a57c2e40c72c5259f0ae61bc9 100644
--- a/paddle/trainer/ParameterUpdater.h
+++ b/paddle/trainer/ParameterUpdater.h
@@ -102,9 +102,9 @@ public:
    * @param cost sum cost during one pass.
    * @return true if accept (used for owlqn).
    */
-  virtual bool finishPass(real cost) {
+  virtual bool finishPass() {
     optimizer_->finishPass();
-    return ParameterUpdater::finishPass(cost);
+    return ParameterUpdater::finishPass();
   }
 
   /**
@@ -220,9 +220,9 @@ public:
     averager_->startPass();
     SgdLocalUpdater::startPass();
   }
-  virtual bool finishPass(real cost) {
+  virtual bool finishPass() {
     averager_->finishPass();
-    return SgdLocalUpdater::finishPass(cost);
+    return SgdLocalUpdater::finishPass();
   }
 
   /// apply the averaged parameter to PARAMETER_VALUE
diff --git a/paddle/trainer/RemoteParameterUpdater.cpp b/paddle/trainer/RemoteParameterUpdater.cpp
index 630f55d998d9f5b5b2880aa02b025e6e56e1f064..6939738203f41e0c1f7204d54834e34b2cd90682 100644
--- a/paddle/trainer/RemoteParameterUpdater.cpp
+++ b/paddle/trainer/RemoteParameterUpdater.cpp
@@ -309,7 +309,7 @@ void RemoteParameterUpdater::startPass() {
   }
 }
 
-bool RemoteParameterUpdater::finishPass(real cost) {
+bool RemoteParameterUpdater::finishPass() {
   if (localUpdater_) {
     localUpdater_->finishPass();
   }
@@ -712,7 +712,7 @@ void SparseRemoteParameterUpdater::startPass() {
   }
 }
 
-bool SparseRemoteParameterUpdater::finishPass(real cost) {
+bool SparseRemoteParameterUpdater::finishPass() {
   if (config_.algorithm() == TrainAlgorithm::SGD) {
     parameterClient_->waitPassFinish();
   } else {
diff --git a/paddle/trainer/RemoteParameterUpdater.h b/paddle/trainer/RemoteParameterUpdater.h
index ec6ed443d33db1d695194092b34d6090a4b5ab94..7794b209009a3429e810074b61e1d5bffa8b3a4e 100644
--- a/paddle/trainer/RemoteParameterUpdater.h
+++ b/paddle/trainer/RemoteParameterUpdater.h
@@ -90,7 +90,7 @@ public:
    */
   virtual void finishBatch(real cost);
   virtual void startPass();
-  virtual bool finishPass(real cost);
+  virtual bool finishPass();
 
 #ifndef PADDLE_DISABLE_TIMER
   virtual void setForwardbackwardTime(uint64_t delta) {
@@ -281,7 +281,7 @@ public:
   /// send all sparse related parameters to all pservers
   virtual void finishBatch(real cost);
   virtual void startPass();
-  virtual bool finishPass(real cost);
+  virtual bool finishPass();
 
   virtual void apply();
   virtual void restore();
diff --git a/paddle/trainer/ThreadParameterUpdater.cpp b/paddle/trainer/ThreadParameterUpdater.cpp
index 2a76d5723ccb68896f8ddbfad31a9d7d84adcf55..870d4a4b0246fe244bbd3796ec14449eb181aad2 100644
--- a/paddle/trainer/ThreadParameterUpdater.cpp
+++ b/paddle/trainer/ThreadParameterUpdater.cpp
@@ -70,7 +70,7 @@ void SgdThreadUpdater::startPass() {
   }
 }
 
-bool SgdThreadUpdater::finishPass(real cost) {
+bool SgdThreadUpdater::finishPass() {
   catchUpWith();
 
   for (auto& para : parameters_) {
diff --git a/paddle/trainer/ThreadParameterUpdater.h b/paddle/trainer/ThreadParameterUpdater.h
index 198435c0f30056a9467b8a076c8443ae243e7c3f..880f1f9ddc49a1193ce23901419d988cae84eb88 100644
--- a/paddle/trainer/ThreadParameterUpdater.h
+++ b/paddle/trainer/ThreadParameterUpdater.h
@@ -47,7 +47,7 @@ public:
   virtual void startPass();
 
   // Use the finishPass() function of the base optimizer.
-  virtual bool finishPass(real cost);
+  virtual bool finishPass();
 
   virtual void init(const std::vector<ParameterPtr>& parameters);
   virtual PassType startBatch(int64_t batchSize);
diff --git a/paddle/trainer/Trainer.cpp b/paddle/trainer/Trainer.cpp
index 1eec2c432d235ef484b688db08aae8a39f878a85..031e3b7cf199c197a9cafbf809afe4dfab15b87b 100644
--- a/paddle/trainer/Trainer.cpp
+++ b/paddle/trainer/Trainer.cpp
@@ -537,7 +537,7 @@ void Trainer::trainOnePassBatch(int passId) {
 
   trainerInternal_.getGradientMachine()->onPassEnd();
 
-  bool accepted = trainerInternal_.getParameterUpdater()->finishPass(cost);
+  bool accepted = trainerInternal_.getParameterUpdater()->finishPass();
 
   globalStat.setThreadInfo(true);
   globalStat.printAllStatus();