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51 lines
1.7 KiB
Python
51 lines
1.7 KiB
Python
# Copyright 2021 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for cross host device transfer."""
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from absl.testing import absltest
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import unittest
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import numpy as np
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import jax
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from jax._src import test_util as jtu
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from jax.config import config
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config.parse_flags_with_absl()
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class RemoteTransferTest(jtu.JaxTestCase):
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# TODO(jheek): this test crashes on multi-GPU.
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@jtu.skip_on_devices("gpu")
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def test_remote_transfer(self):
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if jax.device_count() < 2:
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raise unittest.SkipTest("Remote transfer requires at lest 2 devices")
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dev_a, dev_b = jax.local_devices()[:2]
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if not hasattr(dev_a.client, "make_cross_host_receive_buffers"):
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# TODO(jheek) remove this once a new version of JAX lib is released
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raise unittest.SkipTest("jax-lib doesn't include cross host APIs")
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send_buf = jax.device_put(np.ones((32,)), dev_a)
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shapes = [send_buf.xla_shape()]
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(tag, recv_buf), = dev_b.client.make_cross_host_receive_buffers(
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shapes, dev_b)
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status, dispatched = send_buf.copy_to_remote_device(tag)
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self.assertIsNone(status)
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self.assertTrue(dispatched)
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self.assertArraysEqual(send_buf, recv_buf)
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if __name__ == '__main__':
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absltest.main(testLoader=jtu.JaxTestLoader())
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