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[fix][test] clear cuda cache before unittests automatically #5121

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Jun 18, 2025
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[fix][test] clear cuda cache before unittests automatically #5121

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10 changes: 10 additions & 0 deletions tests/unittest/conftest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
# limitations under the License.
# # Force resource release after test
import pytest
import torch
import tqdm


Expand Down Expand Up @@ -79,3 +80,12 @@ def pytest_sessionstart(session):
# To counter TransformerEngine v2.3's lazy_compile deferral,
# which will cause Pytest thinks there's a thread leakage.
import torch._inductor.async_compile # noqa: F401


@pytest.fixture(autouse=True)
def torch_empty_cache() -> None:
"""
Automatically empty the torch CUDA cache before each test, to reduce risk of OOM errors.
"""
if torch.cuda.is_available():
torch.cuda.empty_cache()