change buildcpu into prebuild and buildcpu into build;test=develop

paddle/fluid/framework/fleet/ps_gpu_wrapper.cc

@@ -50,12 +50,6 @@ void PSGPUWrapper::PreBuildTask(std::shared_ptr<HeterContext> gpu_task) {
   auto& local_ptr = gpu_task->value_ptr_;
 
   std::vector<std::thread> threads;
-#ifdef PADDLE_WITH_PSLIB
-  auto fleet_ptr = FleetWrapper::GetInstance();
-#endif
-#ifdef PADDLE_WITH_PSCORE
-  auto fleet_ptr = paddle::distributed::Communicator::GetInstance();
-#endif
 
   // data should be in input channel
   thread_keys_.resize(thread_keys_thread_num_);
@@ -177,18 +171,6 @@ void PSGPUWrapper::PreBuildTask(std::shared_ptr<HeterContext> gpu_task) {
     VLOG(3) << "GpuPs shard: " << i << " key len: " << local_keys[i].size();
     local_ptr[i].resize(local_keys[i].size());
   }
-
-#ifdef PADDLE_WITH_PSLIB
-  // get day_id: day nums from 1970
-  struct std::tm b;
-  b.tm_year = year_ - 1900;
-  b.tm_mon = month_ - 1;
-  b.tm_mday = day_;
-  b.tm_min = b.tm_hour = b.tm_sec = 0;
-  std::time_t seconds_from_1970 = std::mktime(&b);
-  int day_id = seconds_from_1970 / 86400;
-  fleet_ptr->pslib_ptr_->_worker_ptr->set_day_id(table_id_, day_id);
-#endif
 }
 
 void PSGPUWrapper::BuildPull(std::shared_ptr<HeterContext> gpu_task) {
@@ -208,6 +190,19 @@ void PSGPUWrapper::BuildPull(std::shared_ptr<HeterContext> gpu_task) {
 #ifdef PADDLE_WITH_PSCORE
   auto fleet_ptr = paddle::distributed::Communicator::GetInstance();
 #endif
+
+#ifdef PADDLE_WITH_PSLIB
+  // get day_id: day nums from 1970
+  struct std::tm b;
+  b.tm_year = year_ - 1900;
+  b.tm_mon = month_ - 1;
+  b.tm_mday = day_;
+  b.tm_min = b.tm_hour = b.tm_sec = 0;
+  std::time_t seconds_from_1970 = std::mktime(&b);
+  int day_id = seconds_from_1970 / 86400;
+  fleet_ptr->pslib_ptr_->_worker_ptr->set_day_id(table_id_, day_id);
+#endif
+
   timeline.Start();
   auto ptl_func = [this, &local_keys, &local_ptr, &fleet_ptr](int i) {
     size_t key_size = local_keys[i].size();