[SOT]Fix Train/Eval Switch BUG in SOT (#59747)

* [SOT]Fix Train/Eval Switch BUG in SOT

* rm usless code

python/paddle/jit/dy2static/program_translator.py

@@ -731,7 +731,7 @@ def _perform_call(self, *args, **kwargs):
         traced_fun = symbolic_translate(
             self._dygraph_function,
             build_strategy=build_strategy,
-            training=self._training,
+            training=self._is_train_mode(),
             backend=backend,
         )
         if self._class_instance is not None:

python/paddle/jit/sot/symbolic/compile_cache.py

@@ -62,7 +62,6 @@ def __init__(self, compiled_fn, SIR, is_training: bool):
         self.concrete_program = None
         self.SIR = SIR  # for debug
         self.is_training = is_training
-        self.compiled_fn.eval() if not is_training else self.compiled_fn.train()
 
     def amp_cast_inputs(self, args, kwargs):
         """Prepare inputs for amp, cast float16 into float32 if needed."""
@@ -111,6 +110,7 @@ def __call__(self, *args, **kwargs):
                         self.concrete_program,
                         self.partial_program,
                     ) = self.compiled_fn.get_concrete_program(*args, **kwargs)
+                    self.partial_program.training = self.is_training
             with EventGuard("FallbackWrapper: sot call partial_program"):
                 outputs = self.partial_program.sot_call(*args, **kwargs)
 

test/sot/test_model_switch_training.py

@@ -17,6 +17,7 @@
 import numpy as np
 
 import paddle
+from paddle.jit.sot.symbolic.compile_cache import CompileSIRCache
 
 
 class SimpleNet(paddle.nn.Layer):
@@ -35,6 +36,15 @@ class TestModelSwitchTraining(unittest.TestCase):
     def setUp(self):
         self.seed = 1127
         self.net = SimpleNet()
+        # singleton
+        self.compile_cache = CompileSIRCache()
+
+    def check_mode(self, is_train):
+        self.assertEqual(len(self.compile_cache.cache), 1)
+        mode = list(self.compile_cache.cache.values())[
+            0
+        ].partial_program.training
+        self.assertEqual(mode, is_train)
 
     def get_dygraph_out(self, input):
         paddle.seed(self.seed)
@@ -46,11 +56,16 @@ def get_dygraph_out(self, input):
 
     def get_static_out(self, input):
         paddle.seed(self.seed)
+        self.compile_cache.clear()
         static_net = paddle.jit.to_static(self.net)
         static_net.eval()
         eval_result = static_net(input)
+        self.check_mode(is_train=False)
+        self.compile_cache.clear()
+
         static_net.train()
         train_result = static_net(input)
+        self.check_mode(is_train=True)
         return eval_result, train_result
 
     def test_model_switch_training(self):