bug fix about lru and save

python/paddle/fluid/io.py

@@ -495,11 +495,11 @@ def save_checkpoint(executor,
     serial = _get_lastest_checkpoint_dir(checkpoint_dir) + 1
     cur_dir = _get_serial_dir(checkpoint_dir, serial)
 
+    save_trainer_args(cur_dir, trainer_id, trainer_args)
+
     if is_chief:
         save_persist_vars_without_grad(executor, cur_dir, main_program)
-
+        _lru_delete(checkpoint_dir, max_num_checkpoints)
-    save_trainer_args(cur_dir, trainer_id, trainer_args)
-    _lru_delete(checkpoint_dir, max_num_checkpoints)
 
 
 def need_load_checkpoint(checkpoint_dir):
@@ -639,7 +639,13 @@ def _is_checkpoint_var(var):
             var.desc.type() == core.VarDesc.VarType.RAW:
         return False
 
-    if var.name.endswith("@GRAD"):
+    if "@GRAD" in var.name:
+        return False
+
+    if ".trainer_" in var.name:
+        return False
+
+    if ".block" in var.name:
         return False
 
     return var.persistable