update pserver startup

python/paddle/fluid/transpiler/distribute_transpiler.py

@@ -520,6 +520,11 @@ class DistributeTranspiler:
         return var.persistable
 
     def get_train_startup_program(self, checkpoint_load_dir=None):
+        """
+        Get train startup program.
+        If checkpoint_load_dir is None, rerurn default startup program.
+        IF checkpoint_load_dir is Exist, add checkpoint_load op and load Var.
+        """
         startup_prog = default_startup_program()
 
         if not checkpoint_load_dir:
@@ -536,7 +541,10 @@ class DistributeTranspiler:
             attrs={"dir": checkpoint_load_dir})
         return startup_prog
 
-    def get_startup_program(self, endpoint, pserver_program):
+    def get_startup_program(self,
+                            endpoint,
+                            pserver_program,
+                            checkpoint_load_dir=None):
         """
         Get startup program for current parameter server.
         Modify operator input variables if there are variables that
@@ -561,6 +569,7 @@ class DistributeTranspiler:
             created_var_map[var.name] = tmpvar
 
         # 2. rename op outputs
+        load_vars = []
         for op in orig_s_prog.global_block().ops:
             new_inputs = dict()
             new_outputs = dict()
@@ -588,6 +597,16 @@ class DistributeTranspiler:
                     inputs=new_inputs,
                     outputs=new_outputs,
                     attrs=op.attrs)
+                for var in new_outputs.values():
+                    load_vars.append(var.name)
+        # add checkpoint op 
+        if not checkpoint_load_dir:
+            return s_prog
+
+        s_prog.global_block().append_op(
+            type="checkpoint_load",
+            inputs={"X": load_vars},
+            attrs={"dir": checkpoint_load_dir})
         return s_prog
 
     # transpiler function for dis lookup_table