add flag (#44856)

python/paddle/fluid/executor.py

@@ -1460,6 +1460,9 @@ class Executor(object):
                         ir_graph = framework.IrGraph(program._graph)
                         inner_program = ir_graph.to_program()
                         # print(f"Program after convert:\n {inner_program}", flush=True)
+                        logging.warning(
+                            "FLAGS_USE_STANDALONE_EXECUTOR and FLAGS_CONVERT_GRAPH_TO_PROGRAM is set to 1. Graph will be converted to Program and executed using new executor."
+                        )
                     else:
                         from paddle.incubate.autograd import prim_enabled, prim2orig
                         if prim_enabled() and program == default_main_program():
@@ -1502,6 +1505,10 @@ class Executor(object):
                     else:
                         tensor._copy_from(cpu_tensor, self.place)
 
+                warnings.warn(
+                    "FLAGS_USE_STANDALONE_EXECUTOR is set to 1. New executor is used to execute Program."
+                )
+
                 return new_exe.run(scope, list(feed.keys()), fetch_list,
                                    return_numpy)