[compiled autograd] Fix LoggingTensor flaky test

test/inductor/test_compiled_autograd.py

@@ -51,6 +51,14 @@ def hook3(gI, gO):
 
 
 class TestCompiledAutograd(TestCase):
+    def setUp(self):
+        super().setUp()
+        compiled_autograd.reset()
+
+    def tearDown(self):
+        super().tearDown()
+        compiled_autograd.reset()
+
     def check_output_and_recompiles(
         self, fn, count=1, compiler_fn=compiler_fn, compile_fn=False
     ):
@@ -322,6 +330,9 @@ def bytecode_hook(code, out_code):
             handle.remove()
 
     def test_inputs_aliasing_bytecode_stack_restore(self):
+        import logging
+
+        logging.getLogger().setLevel(logging.WARNING)
         from torch.testing._internal.logging_tensor import LoggingTensor
 
         # Create a graph that allows inputs stealing
@@ -752,6 +763,54 @@ def backward(ctx, gO_1, gO_2, gO_3):
 
         self.check_output_and_recompiles(fn, count=2)
 
+    @unittest.skipIf(not HAS_CUDA, "requires cuda")
+    def test_logging_tensor_flaky(self):
+        # when you first run some test using triton and then run test_inputs_aliasing_bytecode_stack_restore
+        # resulting in:
+        #   - pytest: `TypeError: unsupported operand type(s) for +: 'Tensor' and 'LoggingTensor'`
+        #   - python: `TypeError: not all arguments converted during string formatting`
+
+        # 1. some triton involving test
+        def fn():
+            def _fn(x):
+                return x
+
+            x = torch.arange(
+                1, 10, requires_grad=True, dtype=torch.float16, device="cuda"
+            )
+            out = _fn(x)
+            loss = out.sum()
+            loss.backward()
+
+        with compiled_autograd.enable(compiler_fn):
+            fn()
+
+        import logging
+
+        logging.getLogger().setLevel(
+            logging.WARNING
+        )  # triton setup overwrote it to INFO
+        # 2. test_inputs_aliasing_bytecode_stack_restore
+        from torch.testing._internal.logging_tensor import LoggingTensor
+
+        def forward(inputs):
+            add = inputs[0] + 1
+            add_1 = add + inputs[1]
+            out = add_1.cpu()
+            return (out,)
+
+        gm = torch.fx.symbolic_trace(forward)
+        print(gm.print_readable())
+        torch._dynamo.utils.set_locals_to_steal(gm, ["inputs"])
+        compiled_fn = torch.compile(gm)
+
+        inputs = [
+            torch.ones(1000000, dtype=torch.float32),
+            LoggingTensor(torch.ones(1)),
+        ]
+
+        compiled_fn(inputs)
+
     @unittest.skipIf(not HAS_CUDA, "requires cuda")
     def test_custom_fn_output_metadata(self):
         def my_compiler_fn(gm):

torch/_dynamo/compiled_autograd.py

@@ -319,3 +319,10 @@ def disable():
         if prior:
             compiled_autograd_enabled = True
         torch._C._dynamo.compiled_autograd.set_autograd_compiler(prior)
+
+
+# return to starting state of a new process
+def reset():
+    compiled_autograd_enable = False
+    assert compiled_autograd_enabled_count == 0
+    torch._C._dynamo.compiled_autograd.set_autograd_compiler(None)

torch/testing/_internal/logging_tensor.py

@@ -11,6 +11,7 @@
 import functools
 from torch._C._profiler import gather_traceback, symbolize_tracebacks
 
+logger = logging.getLogger("LoggingTensor")
 
 _dtype_abbrs = {
     torch.bfloat16: "bf16",
@@ -136,7 +137,7 @@ def emit(self, record):
             self.tracebacks_list.append(record.traceback)
 
 def log_input(name: str, var: object):
-    logging.getLogger("LoggingTensor").info("input", (name,), {}, var)  # noqa: PLE1205
+    logger.info("input", (name,), {}, var)  # noqa: PLE1205
 
 class GatherTraceback(logging.Filter):
     def __init__(self, python=True, script=True, cpp=False):
@@ -151,7 +152,6 @@ def filter(self, record):
 @contextlib.contextmanager
 def capture_logs(is_mode=False, python_tb=False, script_tb=False, cpp_tb=False) -> Iterator[List[str]]:
     collect_traceback = python_tb or script_tb or cpp_tb
-    logger = logging.getLogger("LoggingTensor")
     log_list: List[str] = []
     tracebacks_list: List[str] = []
     handler = LoggingTensorHandler(