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2026-07-13 12:40:42 +08:00

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Python

# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed 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.
import unittest
import numpy as np
from op_test import get_device_place
from utils import dygraph_guard
import paddle
from paddle import base
@unittest.skipIf(
paddle.core.is_compiled_with_xpu(),
"xpu does not support dlpack",
)
class TestDLPack(unittest.TestCase):
def test_dlpack_dygraph(self):
if paddle.is_compiled_with_cuda():
with dygraph_guard():
tensor = paddle.to_tensor(np.array([1, 2, 3, 4]).astype("int"))
dlpack_v1 = paddle.utils.dlpack.to_dlpack(tensor)
out_from_dlpack_v1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
dlpack_v2 = tensor.__dlpack__()
out_from_dlpack_v2 = paddle.from_dlpack(dlpack_v2)
self.assertTrue(
isinstance(
out_from_dlpack_v1, paddle.base.core.eager.Tensor
)
)
self.assertTrue(
isinstance(
out_from_dlpack_v2, paddle.base.core.eager.Tensor
)
)
self.assertEqual(
str(tensor.place), str(out_from_dlpack_v1.place)
)
self.assertEqual(
str(tensor.place), str(out_from_dlpack_v2.place)
)
np.testing.assert_array_equal(
out_from_dlpack_v1.numpy(),
np.array([1, 2, 3, 4]).astype("int"),
)
np.testing.assert_array_equal(
out_from_dlpack_v2.numpy(),
np.array([1, 2, 3, 4]).astype("int"),
)
def test_dlpack_tensor_larger_than_2dim(self):
if paddle.is_compiled_with_cuda():
with dygraph_guard():
numpy_data = np.random.randn(4, 5, 6)
t = paddle.to_tensor(numpy_data)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(t)
dlpack_v2 = t.__dlpack__()
out_v1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
out_v2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(str(t.place), str(out_v1.place))
self.assertEqual(str(t.place), str(out_v2.place))
np.testing.assert_allclose(
numpy_data, out_v1.numpy(), rtol=1e-05
)
np.testing.assert_allclose(
numpy_data, out_v2.numpy(), rtol=1e-05
)
def test_dlpack_dtype_and_place_consistency(self):
with dygraph_guard():
dtypes = [
"float16",
"float32",
"float64",
"int8",
"int16",
"int32",
"int64",
"uint8",
"bool",
]
places = [paddle.CPUPlace()]
if paddle.device.is_compiled_with_cuda():
places.append(get_device_place())
dtypes.append("bfloat16")
data = np.ones((2, 3, 4))
for place in places:
for dtype in dtypes:
x = paddle.to_tensor(data, dtype=dtype, place=place)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
o_v1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
dlpack_v2 = x.__dlpack__()
o_v2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x.dtype, o_v1.dtype)
self.assertEqual(x.dtype, o_v2.dtype)
np.testing.assert_allclose(
x.numpy(), o_v1.numpy(), rtol=1e-05
)
np.testing.assert_allclose(
x.numpy(), o_v2.numpy(), rtol=1e-05
)
self.assertEqual(str(x.place), str(o_v1.place))
self.assertEqual(str(x.place), str(o_v2.place))
complex_dtypes = ["complex64", "complex128"]
for place in places:
for dtype in complex_dtypes:
x = paddle.to_tensor(
[[1 + 6j, 2 + 5j, 3 + 4j], [4 + 3j, 5 + 2j, 6 + 1j]],
dtype=dtype,
place=place,
)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
o_v1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
dlpack_v2 = x.__dlpack__()
o_v2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x.dtype, o_v1.dtype)
self.assertEqual(x.dtype, o_v2.dtype)
np.testing.assert_allclose(
x.numpy(), o_v1.numpy(), rtol=1e-05
)
np.testing.assert_allclose(
x.numpy(), o_v2.numpy(), rtol=1e-05
)
self.assertEqual(str(x.place), str(o_v1.place))
self.assertEqual(str(x.place), str(o_v2.place))
def test_dlpack_deletion(self):
# See Paddle issue 47171
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
a = paddle.rand(shape=[3, 5], dtype="float32").to(
device=place
)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(a)
dlpack_v2 = a.__dlpack__()
b1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
b2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(str(a.place), str(b1.place))
self.assertEqual(str(a.place), str(b2.place))
def test_to_dlpack_for_loop(self):
# See Paddle issue 50120
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.rand([3, 5]).to(device=place)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
dlpack_v2 = x.__dlpack__()
def test_to_dlpack_modification(self):
# See Paddle issue 50120
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.rand([3, 5]).to(device=place)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
dlpack_v2 = x.__dlpack__()
y1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
y2 = paddle.from_dlpack(dlpack_v2)
y1[1:2, 2:5] = 2.0
y2[1:2, 2:5] = 2.0
np.testing.assert_allclose(x.numpy(), y1.numpy())
np.testing.assert_allclose(x.numpy(), y2.numpy())
self.assertEqual(str(x.place), str(y1.place))
self.assertEqual(str(x.place), str(y2.place))
def test_to_dlpack_data_ptr_consistency(self):
# See Paddle issue 50120
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.rand([3, 5]).to(device=place)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
dlpack_v2 = x.__dlpack__()
y1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
y2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x.data_ptr(), y1.data_ptr())
self.assertEqual(x.data_ptr(), y2.data_ptr())
self.assertEqual(str(x.place), str(y1.place))
self.assertEqual(str(x.place), str(y2.place))
def test_to_dlpack_strides_consistency(self):
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.rand([10, 10]).to(device=place)
x_strided = x[::2, ::2]
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x_strided)
dlpack_v2 = x_strided.__dlpack__()
y1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
y2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x_strided.strides, y1.strides)
self.assertEqual(x_strided.strides, y2.strides)
self.assertEqual(str(x_strided.place), str(y1.place))
self.assertEqual(str(x_strided.place), str(y2.place))
np.testing.assert_equal(x_strided.numpy(), y1.numpy())
np.testing.assert_equal(x_strided.numpy(), y2.numpy())
def test_to_dlpack_from_zero_dim(self):
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.to_tensor(1.0, place=place)
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
dlpack_v2 = x.__dlpack__()
y1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
y2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x.data_ptr(), y1.data_ptr())
self.assertEqual(x.data_ptr(), y2.data_ptr())
self.assertEqual(str(x.place), str(y1.place))
self.assertEqual(str(x.place), str(y2.place))
self.assertEqual(y1.shape, [])
self.assertEqual(y2.shape, [])
self.assertEqual(y1.numel().item(), 1)
self.assertEqual(y2.numel().item(), 1)
np.testing.assert_array_equal(x.numpy(), y1.numpy())
np.testing.assert_array_equal(x.numpy(), y2.numpy())
def test_to_dlpack_from_zero_size(self):
with dygraph_guard():
places = [base.CPUPlace()]
if paddle.is_compiled_with_cuda():
places.append(get_device_place())
for place in places:
for _ in range(4):
x = paddle.zeros([0, 10]).to(device=place)
self.assertEqual(x.strides, [10, 1])
dlpack_v1 = paddle.utils.dlpack.to_dlpack(x)
dlpack_v2 = x.__dlpack__()
y1 = paddle.utils.dlpack.from_dlpack(dlpack_v1)
y2 = paddle.from_dlpack(dlpack_v2)
self.assertEqual(x.data_ptr(), y1.data_ptr())
self.assertEqual(x.data_ptr(), y2.data_ptr())
self.assertEqual(str(x.place), str(y1.place))
self.assertEqual(str(x.place), str(y2.place))
self.assertEqual(y1.strides, [10, 1])
self.assertEqual(y2.strides, [10, 1])
self.assertEqual(y1.shape, [0, 10])
self.assertEqual(y2.shape, [0, 10])
self.assertEqual(y1.numel().item(), 0)
self.assertEqual(y2.numel().item(), 0)
np.testing.assert_array_equal(x.numpy(), y1.numpy())
np.testing.assert_array_equal(x.numpy(), y2.numpy())
def test_dlpack_with_custom_stream(self):
if not (paddle.is_compiled_with_cuda()):
self.skipTest("Test requires CUDA support.")
with dygraph_guard():
paddle.set_device('gpu:0')
s1 = paddle.device.Stream()
s2 = paddle.device.Stream()
e = paddle.device.Event()
s2.wait_event(e)
x = paddle.to_tensor([1, 2, 3], dtype='float32')
s1.synchronize()
dlpack_capsule = x.__dlpack__(stream=s1.stream_base.raw_stream)
y = paddle.from_dlpack(dlpack_capsule)
np.testing.assert_array_equal(x.numpy(), y.numpy())
self.assertTrue(s1.query(), "Stream s1 did not complete all tasks.")
self.assertTrue(s2.query(), "Stream s2 did not complete all tasks.")
def test_dlpack_with_custom_stream_error(self):
if not (paddle.is_compiled_with_cuda()):
self.skipTest("Test requires CUDA support.")
with dygraph_guard():
x = paddle.to_tensor([1, 2, 3], dtype='float32')
with self.assertRaisesRegex(
TypeError, "stream must be an integer or None."
):
dlpack_capsule = x.__dlpack__(stream=object())
with self.assertRaisesRegex(
ValueError, "For CUDA, stream=0 is ambiguityous"
):
dlpack_capsule = x.__dlpack__(stream=0)
with self.assertRaisesRegex(
ValueError,
"For CUDA, stream=2 means per-thread default stream, which is not supported.",
):
dlpack_capsule = x.__dlpack__(stream=2)
@unittest.skipIf(
paddle.core.is_compiled_with_xpu(),
"xpu does not support dlpack",
)
class TestRaiseError(unittest.TestCase):
def test_dlpack_invalid_sparse(self):
sparse_tensor = paddle.sparse.sparse_coo_tensor(
indices=[[0]], values=[1], shape=[3]
)
with self.assertRaises(BufferError):
sparse_tensor.__dlpack__()
def test_dlpack_requires_grad(self):
tensor_with_grad = paddle.to_tensor(
[1.0, 2.0, 3.0], stop_gradient=False
)
with self.assertRaises(BufferError):
tensor_with_grad.__dlpack__()
if __name__ == "__main__":
unittest.main()