diff --git a/paddle/parameter/ParameterUpdaterHook.cpp b/paddle/parameter/ParameterUpdaterHook.cpp
index 66e554a70d9efaab43ba46fa30b9c128514b75d8..ba2cb37fa2cecf9f04a1e52819d4e09ab6aacb19 100644
--- a/paddle/parameter/ParameterUpdaterHook.cpp
+++ b/paddle/parameter/ParameterUpdaterHook.cpp
@@ -38,29 +38,28 @@ namespace paddle {
 
 class StaticPruningHook : public IParameterUpdaterHook {
 public:
-  explicit StaticPruningHook(const ParameterUpdaterHookConfig& hookConfig)
+  explicit StaticPruningHook(const ParameterUpdaterHookConfig &hookConfig)
       : initCount_(0) {
     sparsityRatio_ = hookConfig.sparsity_ratio();
   }
 
-  static bool sortPairAscend(const std::pair<real, size_t>& pair1,
-                             const std::pair<real, size_t>& pair2) {
+  static bool sortPairAscend(const std::pair<real, size_t> &pair1,
+                             const std::pair<real, size_t> &pair2) {
     return pair1.first > pair2.first;
   }
 
-  void update(Parameter* para) {
+  void update(Parameter *para) {
     updateThreadChecker_.check();
-    auto& vec = para->getBuf(PARAMETER_GRADIENT);
+    auto &vec = para->getBuf(PARAMETER_GRADIENT);
     if (vec) {
       vec->dotMul(*maskVec_);
     }
   }
 
-  void generateMask(Parameter* para) {
-
+  void generateMask(Parameter *para) {
     VectorPtr maskTemp = Vector::create(para->getSize(), false);
     maskTemp->zeroMem();
-    real* maskTempData = maskTemp->getData();
+    real *maskTempData = maskTemp->getData();
     size_t nonZeroNum = para->getSize() * (1 - sparsityRatio_);
 
     VectorPtr paraVec = para->getBuf(PARAMETER_VALUE);
@@ -72,9 +71,10 @@ public:
     for (size_t i = 0; i < para->getSize(); i++)
       param.push_back(std::make_pair(fabs(paraCpuCopy->getData()[i]), i));
 
-    std::partial_sort(
-        param.begin(), param.begin() + nonZeroNum, param.end(), sortPairAscend);
-    for (size_t i = 0; i < nonZeroNum; i++) maskTempData[param[i].second] = 1.0;
+    std::partial_sort(param.begin(), param.begin() + nonZeroNum, param.end(),
+                      sortPairAscend);
+    for (size_t i = 0; i < nonZeroNum; i++)
+      maskTempData[param[i].second] = 1.0;
 
     // Currently just use a mask vector for hack.
     if (para->useGpu()) {
@@ -85,7 +85,7 @@ public:
     }
   }
 
-  void init(Parameter* para) {
+  void init(Parameter *para) {
     generateMask(para);
     size_t initCount = this->initCount_.fetch_add(1);
     CHECK_EQ(initCount, 0UL) << "Currently the StaticPruningHook must invoke "
@@ -93,7 +93,7 @@ public:
     VLOG(3) << "Initialize Parameter " << para;
     SetDevice device(para->getDeviceId());
 
-    auto& paraVec = para->getBuf(PARAMETER_VALUE);
+    auto &paraVec = para->getBuf(PARAMETER_VALUE);
     paraVec->dotMul(*maskVec_);
   }
 
@@ -118,7 +118,7 @@ IParameterUpdaterHook::~IParameterUpdaterHook() {}
  */
 class StringIntPairHasher {
 public:
-  size_t operator()(const std::pair<std::string, int>& k) const {
+  size_t operator()(const std::pair<std::string, int> &k) const {
     return intHasher_(strHasher_(k.first) + k.second);
   }
 
@@ -127,17 +127,15 @@ private:
   std::hash<int> intHasher_;
 };
 
-static WeakKVCache<std::pair<std::string, int>,
-                   IParameterUpdaterHook,
-                   StringIntPairHasher>
-    g_hookCache_;
+static WeakKVCache<std::pair<std::string, int>, IParameterUpdaterHook,
+                   StringIntPairHasher> g_hookCache_;
 
 /**
  * ParameterUpdaterHook actually factory method.
  */
-static IParameterUpdaterHook* createImpl(
-    const ParameterUpdaterHookConfig& config) {
-  auto& type = config.type();
+static IParameterUpdaterHook *
+createImpl(const ParameterUpdaterHookConfig &config) {
+  auto &type = config.type();
   if (type == "pruning") {
     return new StaticPruningHook(config);
   }
@@ -146,11 +144,11 @@ static IParameterUpdaterHook* createImpl(
   return nullptr;
 }
 
-std::shared_ptr<IParameterUpdaterHook> IParameterUpdaterHook::create(
-    const ParameterConfig& paramConfig, int idx) {
+std::shared_ptr<IParameterUpdaterHook>
+IParameterUpdaterHook::create(const ParameterConfig &paramConfig, int idx) {
   std::pair<std::string, int> key = {paramConfig.name(), idx};
   return g_hookCache_.get(
       key, [&] { return createImpl(paramConfig.update_hooks(idx)); });
 }
 
-}  // namespace paddle
+} // namespace paddle