chore: import upstream snapshot with attribution

python/tvm/testing/locking.py

@@ -0,0 +1,65 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""Helpers for tests that use exclusive machine resources."""
+
+import os
+import tempfile
+from collections.abc import Callable
+from pathlib import Path
+from typing import Any, TypeVar
+
+from tvm_ffi.utils import FileLock
+
+_LOCK_DIR_ENV_VAR = "TVM_TEST_LOCK_DIR"
+_LOCK_DIR_NAME = "tvm-testing-locks"
+_R = TypeVar("_R")
+
+
+def _ensure_test_lock_path(filename: str) -> Path:
+    lock_dir_override = os.environ.get(_LOCK_DIR_ENV_VAR)
+    if lock_dir_override:
+        lock_dir = Path(lock_dir_override).expanduser()
+    else:
+        lock_dir = Path(tempfile.gettempdir()) / _LOCK_DIR_NAME
+
+    lock_dir.mkdir(parents=True, exist_ok=True)
+    return lock_dir / filename
+
+
+def run_with_gpu_lock(func: Callable[..., _R], /, *args: Any, **kwargs: Any) -> _R:
+    """Run a callable while holding the machine-local GPU lock.
+
+    The lock avoids contentious GPU access that may break GPU-related tests.
+
+    Parameters
+    ----------
+    func : Callable
+        Callable containing the complete live local-GPU lifetime.
+    *args : Any
+        Positional arguments forwarded to ``func``.
+    **kwargs : Any
+        Keyword arguments forwarded to ``func``.
+
+    Returns
+    -------
+    result : Any
+        The return value of ``func``.
+    """
+
+    lock_path = _ensure_test_lock_path("gpu.lock")
+    with FileLock(str(lock_path)):
+        return func(*args, **kwargs)