Revert "[inductor] turn on windows inductor UTs (#160161)"

This reverts commit f0980fc0bbd656d6c02d23ad97e945353b314f35.

Reverted https://github.com/pytorch/pytorch/pull/160161 on behalf of https://github.com/clee2000 due to broke some inductor tests on windows inductor\test_codecache.py::TestStandaloneCompile::test_different_process [GH job link](https://github.com/pytorch/pytorch/actions/runs/16853706010/job/47748778757) [HUD commit link](f0980fc0bb).  note to self: bad TD ([comment](https://github.com/pytorch/pytorch/pull/160161#issuecomment-3172784292))

.github/workflows/trunk.yml

@@ -123,10 +123,9 @@ jobs:
       runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral"
       test-matrix: |
         { include: [
-          { config: "default", shard: 1, num_shards: 4, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
-          { config: "default", shard: 2, num_shards: 4, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
-          { config: "default", shard: 3, num_shards: 4, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
-          { config: "default", shard: 4, num_shards: 4, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
+          { config: "default", shard: 1, num_shards: 3, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
+          { config: "default", shard: 2, num_shards: 3, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
+          { config: "default", shard: 3, num_shards: 3, runner: "${{ needs.get-label-type.outputs.label-type }}windows.4xlarge.nonephemeral" },
         ]}
     secrets: inherit
 

test/dynamo/test_decorators.py

@@ -10,7 +10,6 @@ import torch._dynamo.test_case
 import torch._dynamo.testing
 from torch._dynamo.exc import IncorrectUsage, Unsupported
 from torch._dynamo.utils import counters
-from torch.testing._internal.common_utils import skipIfWindows
 
 
 def my_custom_function(x):
@@ -893,9 +892,6 @@ class DecoratorTests(torch._dynamo.test_case.TestCase):
         self.assertEqual(gn(inp), inp + 3)
         self.assertEqual(cnts.frame_count, 1)
 
-    @skipIfWindows(
-        msg="TODO: (xuhancn), confirm if torch.compiler.disable work on Windows."
-    )
     def test_disable_recursive_false(self):
         def fn2(x):
             return x + 1

test/dynamo/test_logging.py

@@ -21,10 +21,8 @@ from torch.nn.parallel import DistributedDataParallel as DDP
 from torch.testing._internal.common_cuda import SM90OrLater
 from torch.testing._internal.common_utils import (
     find_free_port,
-    IS_WINDOWS,
     munge_exc,
     skipIfTorchDynamo,
-    skipIfWindows,
     TEST_XPU,
     xfailIf,
 )
@@ -530,7 +528,7 @@ LoweringException: AssertionError:
             "import torch",
             env=env,
         )
-        lines = stderr.decode().split("\r\n" if IS_WINDOWS else "\n")
+        lines = stderr.decode().split("\n")
         # This is a sanity assert that our error is not spammy.
         # As of this test creation this was 18.
         # See this issue for the purpose o this test:
@@ -546,7 +544,6 @@ LoweringException: AssertionError:
         self.assertEqual(lines[-4], "Valid settings:")
 
     @requires_distributed()
-    @skipIfWindows(msg="TODO: (xuhancn), Can't reproduce locally")
     def test_distributed_rank_logging(self):
         env = dict(os.environ)
         env["TORCH_LOGS"] = "dynamo"

test/inductor/test_cpu_select_algorithm.py

@@ -26,7 +26,6 @@ from torch.testing._internal.common_quantized import (
 )
 from torch.testing._internal.common_utils import (
     IS_MACOS,
-    IS_WINDOWS,
     parametrize,
     skipIfWindows,
     TEST_MKL,
@@ -3095,5 +3094,5 @@ instantiate_device_type_tests(
 if __name__ == "__main__":
     from torch.testing._internal.inductor_utils import HAS_CPU
 
-    if HAS_CPU and not (IS_MACOS or IS_WINDOWS):
+    if HAS_CPU and not IS_MACOS:
         run_tests()

torch/_dynamo/test_case.py

@@ -41,9 +41,11 @@ def run_tests(needs: Union[str, tuple[str, ...]] = ()) -> None:
     if TEST_WITH_TORCHDYNAMO or TEST_WITH_CROSSREF:
         return  # skip testing
 
-    # Enable Inductor UTs on Windows for CPU.
-    # CUDA on Windows is not verified, NVDA developer can continue to enable CUDA based on CPU path.
-    if torch.cuda.is_available() and IS_WINDOWS:
+    if (
+        not torch.xpu.is_available()
+        and IS_WINDOWS
+        and os.environ.get("TORCHINDUCTOR_WINDOWS_TESTS", "0") == "0"
+    ):
         return
 
     if isinstance(needs, str):