chore: import upstream snapshot with attribution

tests/basic_correctness/test_cpu_offload.py

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import pytest
+
+from ..utils import compare_two_settings
+
+
+@pytest.mark.parametrize("disable_pin_memory", [False, True])
+@pytest.mark.parametrize("disable_uva", [False, True])
+def test_cpu_offload(disable_pin_memory, disable_uva):
+    env_vars = {
+        "VLLM_WEIGHT_OFFLOADING_DISABLE_PIN_MEMORY": str(int(disable_pin_memory)),
+        "VLLM_WEIGHT_OFFLOADING_DISABLE_UVA": str(int(disable_uva)),
+    }
+
+    args = ["--cpu-offload-gb", "1"]
+
+    # cuda graph only works with UVA offloading
+    if disable_uva:
+        args.append("--enforce-eager")
+
+    compare_two_settings(
+        model="hmellor/tiny-random-LlamaForCausalLM",
+        arg1=[],
+        arg2=args,
+        env1=None,
+        env2=env_vars,
+    )