Enhancements to recompiles logs (#130043)

----

- We now record on CacheEntry what the compile id that populated it was, so now we can say why a specific frame was rejected
- Add structured log for recompiles under name artifact "recompile_reasons". As it stands, it's not terribly structured, but this was the easiest thing I could do to start
- Slightly reformat multi-reason printing; since we only report one guard failure seems better to have it as a single line

Example output:

```
V0703 10:34:13.273000 140345997743104 torch/_dynamo/guards.py:2590] [0/1] [__recompiles] Recompiling function f in /data/users/ezyang/a/pytorch/b.py:3
V0703 10:34:13.273000 140345997743104 torch/_dynamo/guards.py:2590] [0/1] [__recompiles]     triggered by the following guard failure(s):
V0703 10:34:13.273000 140345997743104 torch/_dynamo/guards.py:2590] [0/1] [__recompiles]     - 0/0: tensor 'L['x']' size mismatch at index 0. expected 4, actual 5
```

Signed-off-by: Edward Z. Yang <ezyang@meta.com>

Pull Request resolved: https://github.com/pytorch/pytorch/pull/130043
Approved by: https://github.com/anijain2305

test/dynamo/test_frame_init.py

@@ -2,6 +2,7 @@
 
 import torch
 import torch._dynamo.test_case
+from torch._guards import CompileId
 
 
 def target_with_varkwargs(arg1, /, positional_only_arg, *, keyword_only_arg, **kwargs):
@@ -89,7 +90,7 @@ class FrameInitTests(torch._dynamo.test_case.TestCase):
             if frame.f_code in code_map1:
                 transformed_code = code_map1[frame.f_code]
                 return torch._dynamo.types.GuardedCode(
-                    transformed_code, lambda f_locals: True
+                    transformed_code, lambda f_locals: True, CompileId(0, 0)
                 )
             return None
 
@@ -97,7 +98,7 @@ class FrameInitTests(torch._dynamo.test_case.TestCase):
             if frame.f_code in code_map2:
                 transformed_code = code_map2[frame.f_code]
                 return torch._dynamo.types.GuardedCode(
-                    transformed_code, lambda f_locals: True
+                    transformed_code, lambda f_locals: True, CompileId(0, 0)
                 )
             return None
 

test/dynamo/test_higher_order_ops.py

@@ -2470,9 +2470,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "pyfunctorch")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([])""",
+            """torch._functorch.pyfunctorch.compare_functorch_state([])""",
             munge_exc(record.getMessage()),
         )
 
@@ -2502,9 +2500,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "forward_ad")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch.autograd.forward_ad._current_level == -1""",
+            """torch.autograd.forward_ad._current_level == -1""",
             munge_exc(record.getMessage()),
         )
 
@@ -2534,17 +2530,13 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         if self.hasRecord(records, "pyfunctorch"):
             record = self.getRecord(records, "pyfunctorch")
             self.assertIn(
-                """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([])""",
+                """torch._functorch.pyfunctorch.compare_functorch_state([])""",
                 munge_exc(record.getMessage()),
             )
         elif self.hasRecord(records, "forward_ad"):
             record = self.getRecord(records, "forward_ad")
             self.assertIn(
-                """\
-    triggered by the following guard failure(s):
-    - torch.autograd.forward_ad._current_level == -1""",
+                """torch.autograd.forward_ad._current_level == -1""",
                 munge_exc(record.getMessage()),
             )
 
@@ -2588,9 +2580,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "pyfunctorch")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'same')])""",
+            """torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'same')])""",
             record.getMessage(),
         )
 
@@ -2614,9 +2604,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "pyfunctorch")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'error')])""",
+            """torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'error')])""",
             record.getMessage(),
         )
 
@@ -2644,9 +2632,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "pyfunctorch")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'error')])""",
+            """torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'error')])""",
             munge_exc(record.getMessage()),
         )
 
@@ -2665,9 +2651,7 @@ class HigherOrderOpVmapGuardTests(LoggingTestCase):
         self.assertGreater(len(records), 0)
         record = self.getRecord(records, "pyfunctorch")
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):
-    - torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'same')])""",
+            """torch._functorch.pyfunctorch.compare_functorch_state([('Vmap', 1, 'same')])""",
             munge_exc(record.getMessage()),
         )
 

test/dynamo/test_logging.py

@@ -614,14 +614,11 @@ print("arf")
         record_str = "\n".join(r.getMessage() for r in records)
 
         self.assertIn(
-            """\
-L['zs'][0] == 3.0                                             # for y, z in zip(ys, zs):""",
+            """L['zs'][0] == 3.0""",
             record_str,
         )
         self.assertIn(
-            """\
-    triggered by the following guard failure(s):\n\
-    - len(L['ys']) == 2                                             # for y, z in zip(ys, zs):""",
+            "len(L['ys']) == 2",
             record_str,
         )
 

test/dynamo/test_modules.py

@@ -2200,7 +2200,7 @@ class OptimizedModuleTest(torch._dynamo.test_case.TestCase):
         m._forward_hooks[handle.id] = new_forward_hook
         self.assertEqual(compiled_func(inp), outer_func(inp))
         self.assertEqual(compiled_func(inp).item(), 16)
-        self.assertRegex(failure_reason, r"^___check_obj_id\(L\['m'\]._forward_hooks")
+        self.assertRegex(failure_reason, r"___check_obj_id\(L\['m'\]._forward_hooks")
 
     @patch.object(torch._dynamo.config, "guard_nn_modules", False)
     @patch.object(torch._dynamo.config, "skip_nnmodule_hook_guards", True)

test/dynamo/test_structured_trace.py

@@ -152,7 +152,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950
@@ -176,7 +175,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950
@@ -207,9 +205,9 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
+{"artifact": {"name": "recompile_reasons", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_storage": {"id": 0, "describer_id": "ID", "size": 4000000}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_tensor": {"id": 0, "ndim": 2, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [1000, 1000], "is_leaf": true, "stride": [1000, 1], "storage": 0, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
@@ -219,7 +217,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 """,  # noqa: B950
@@ -242,7 +239,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950
@@ -339,7 +335,6 @@ class StructuredTraceTest(TestCase):
                 self.buffer.getvalue(),
                 """\
 {"dynamo_start": {"stack": "STACK"}, "rank": 0, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
-{"dynamo_guards": {}, "rank": 0, "frame_id": 0, "frame_compile_id": 0, "attempt": 1, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "rank": 0, "frame_id": 0, "frame_compile_id": 0, "attempt": 1, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "rank": 0, "frame_id": 0, "frame_compile_id": 0, "attempt": 1}
 {"dynamo_start": {"stack": "STACK"}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0}
@@ -365,7 +360,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "rank": 0, "frame_id": 1, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950
@@ -445,7 +439,6 @@ class StructuredTraceTest(TestCase):
             self.buffer.getvalue(),
             """\
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 1, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 1, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 1}
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0}
@@ -457,7 +450,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 1, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 1, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950
@@ -488,9 +480,9 @@ class StructuredTraceTest(TestCase):
 {"describe_tensor": {"id": 1, "ndim": 2, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [20, 30], "is_leaf": true, "stride": [30, 1], "storage": 1, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 {"describe_source": {"describer_id": "ID", "id": 1, "source": "L['b']"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 {"dynamo_output_graph": {"sizes": {"l_a_": [10, 20], "l_b_": [20, 30], "matmul": [10, 30]}}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
+{"artifact": {"name": "recompile_reasons", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_storage": {"id": 0, "describer_id": "ID", "size": 200}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_tensor": {"id": 0, "ndim": 2, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [5, 10], "is_leaf": true, "stride": [10, 1], "storage": 0, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
@@ -499,7 +491,6 @@ class StructuredTraceTest(TestCase):
 {"describe_tensor": {"id": 1, "ndim": 2, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [10, 15], "is_leaf": true, "stride": [15, 1], "storage": 1, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_source": {"describer_id": "ID", "id": 1, "source": "L['b']"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"dynamo_output_graph": {"sizes": {"l_a_": ["s0", "s1"], "l_b_": ["s1", "s3"], "matmul": ["s0", "s3"]}}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 """,  # noqa: B950
@@ -532,15 +523,14 @@ class StructuredTraceTest(TestCase):
 {"describe_tensor": {"id": 0, "ndim": 1, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [1], "is_leaf": true, "stride": [1], "storage": 0, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 {"describe_source": {"describer_id": "ID", "id": 0, "source": "L['x']"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 {"dynamo_output_graph": {"sizes": {"l_x_": [1], "x": [1]}}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
+{"artifact": {"name": "recompile_reasons", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_storage": {"id": 0, "describer_id": "ID", "size": 4}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_tensor": {"id": 0, "ndim": 1, "dtype": "torch.float32", "device": "device(type='cpu')", "size": [1], "is_leaf": true, "stride": [1], "storage": 0, "view_func": "VIEW_FUNC", "describer_id": "ID"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"describe_source": {"describer_id": "ID", "id": 0, "source": "L['x']"}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 {"dynamo_output_graph": {"sizes": {"l_x_": [1], "x": [1]}}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 1, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 1, "attempt": 0}
 """,  # noqa: B950
@@ -572,7 +562,6 @@ class StructuredTraceTest(TestCase):
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_post_grad_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 {"dynamo_start": {"stack": "STACK"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
@@ -583,7 +572,6 @@ class StructuredTraceTest(TestCase):
 {"aot_forward_graph": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"artifact": {"name": "fx_graph_cache_hash", "encoding": "json"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"inductor_output_code": {"filename": "FILENAME"}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
-{"dynamo_guards": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"dynamo_cpp_guards_str": {}, "frame_id": 0, "frame_compile_id": 0, "attempt": 0, "has_payload": "HASH"}
 {"compilation_metrics": "METRICS", "frame_id": 0, "frame_compile_id": 0, "attempt": 0}
 """,  # noqa: B950

torch/_dynamo/convert_frame.py

@@ -728,7 +728,7 @@ def _compile(
             hooks.guard_fail_fn if hooks else None,
         )
 
-        guarded_code = GuardedCode(out_code, check_fn.check_fn)
+        guarded_code = GuardedCode(out_code, check_fn.check_fn, compile_id)
 
         if not output.is_empty_graph() and hooks.guard_export_fn is not None:
             # We should not run the guard_export_fn when Dynamo does not

torch/_dynamo/guards.py

@@ -49,6 +49,8 @@ from torch._dynamo.source import (
     TensorPropertySource,
 )
 from torch._guards import (
+    CompileContext,
+    CompileId,
     DuplicateInputs,
     Guard,
     GuardBuilderBase,
@@ -2133,6 +2135,7 @@ class CheckFunctionManager:
                     reasons = get_guard_fail_reason_helper(
                         self.guard_manager,  # type: ignore[arg-type]
                         output_graph.local_scope,
+                        CompileContext.current_compile_id(),
                     )
                     raise AssertionError(f"Guard check failed: {reasons}")
 
@@ -2300,9 +2303,10 @@ class CheckFunctionManager:
                 add_code_part(code, gcl.guard, config.enable_cpp_guard_manager)
 
         # OK, all done generating guards
-        torch._logging.trace_structured(
-            "dynamo_guards", payload_fn=lambda: [f() for f in structured_guard_fns]
-        )
+        if structured_guard_fns:
+            torch._logging.trace_structured(
+                "dynamo_guards", payload_fn=lambda: [f() for f in structured_guard_fns]
+            )
 
         global_state = convert_frame.initial_global_state
         if global_state is None:
@@ -2472,6 +2476,7 @@ def recompilation_reason_for_no_tensor_aliasing_guard(guard_manager, scope):
 def get_guard_fail_reason_helper(
     guard_fn: GuardFn,
     f_locals: Dict[str, object],
+    compile_id: CompileId,
 ) -> str:
     """
     Return the reason why `guard_fn` failed.
@@ -2536,7 +2541,7 @@ def get_guard_fail_reason_helper(
                 if not is_recompiles_verbose_enabled():
                     break
 
-    reason_str = "\n".join(reasons)
+    reason_str = f"{compile_id}: " + "; ".join(reasons)
     return reason_str
 
 
@@ -2544,8 +2549,9 @@ def get_guard_fail_reason(
     guard_fn: GuardFn,
     code: types.CodeType,
     f_locals: Dict[str, object],
+    compile_id: CompileId,
 ) -> str:
-    reason_str = get_guard_fail_reason_helper(guard_fn, f_locals)
+    reason_str = get_guard_fail_reason_helper(guard_fn, f_locals, compile_id)
     guard_failures[orig_code_map[code]].append(reason_str)
 
     try:
@@ -2572,7 +2578,10 @@ def get_and_maybe_log_recompilation_reason(
     reasons = []
     while cache_entry is not None:
         reason = get_guard_fail_reason(
-            cache_entry.check_fn, cache_entry.code, frame.f_locals
+            cache_entry.check_fn,
+            cache_entry.code,
+            frame.f_locals,
+            cache_entry.compile_id,
         )
         if reason:
             reasons.append(reason)
@@ -2606,6 +2615,15 @@ def get_and_maybe_log_recompilation_reason(
         if config.error_on_recompile:
             raise exc.RecompileError(message)
 
+    torch._logging.trace_structured(
+        "artifact",
+        metadata_fn=lambda: {
+            "name": "recompile_reasons",
+            "encoding": "json",
+        },
+        payload_fn=lambda: reasons,
+    )
+
     return reasons
 
 

torch/_dynamo/testing.py

@@ -29,7 +29,7 @@ from .bytecode_transformation import (
     is_generator,
     transform_code_object,
 )
-from .guards import CheckFunctionManager, GuardedCode
+from .guards import CheckFunctionManager, CompileId, GuardedCode
 from .utils import same
 
 unsupported = eval_frame.unsupported
@@ -163,7 +163,7 @@ def debug_insert_nops(
         f_code=frame.f_code,
     )
 
-    return GuardedCode(code, CheckFunctionManager(graph).check_fn)
+    return GuardedCode(code, CheckFunctionManager(graph).check_fn, CompileId(0, 0))
 
 
 class CompileCounter:

torch/_dynamo/types.py

@@ -13,6 +13,7 @@ else:
     DynamoFrameType: TypeAlias = types.FrameType
 
 import torch
+from torch._guards import CompileId
 
 # This class has a `check_fn` field for the guard,
 #  and a `code` field for the code object.
@@ -50,6 +51,7 @@ class GuardFn(Protocol):
 class GuardedCode:
     code: types.CodeType
     check_fn: GuardFn
+    compile_id: CompileId
 
 
 class DynamoCallbackFn(Protocol):

torch/csrc/dynamo/cache_entry.cpp

@@ -7,6 +7,7 @@
 CacheEntry::CacheEntry(const py::handle& guarded_code, PyObject* backend) {
   this->check_fn = guarded_code.attr("check_fn");
   this->code = guarded_code.attr("code");
+  this->compile_id = guarded_code.attr("compile_id");
   this->backend = backend;
   // TODO - clean this up when enable_cpp_guard_manager is True by default
   if (py::hasattr(this->check_fn, "root")) {

torch/csrc/dynamo/cache_entry.h

@@ -41,6 +41,8 @@ typedef struct VISIBILITY_HIDDEN CacheEntry {
   py::object check_fn;
   // modified user bytecode (protected by check_fn's guards)
   py::object code;
+  // CompileId corresponding to this compilation
+  py::object compile_id;
   // root guard manager if exists
   void* root_mgr{nullptr};
   // backend used to create this cache entry

torch/csrc/dynamo/init.cpp

@@ -60,6 +60,7 @@ void initDynamoBindings(PyObject* torch) {
   py::class_<CacheEntry>(m, "_CacheEntry")
       .def_readonly("check_fn", &CacheEntry::check_fn)
       .def_readonly("code", &CacheEntry::code)
+      .def_readonly("compile_id", &CacheEntry::compile_id)
       .def_property_readonly("next", &CacheEntry::next);
 
   py::class_<ExtraState>(m, "_ExtraState")