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614bbcc626
a set of devices. We may want to make this topology serializable or usable as a cache key. PiperOrigin-RevId: 552931150
123 lines
3.9 KiB
Python
123 lines
3.9 KiB
Python
# Copyright 2021 The JAX Authors.
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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 AOT compilation."""
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import contextlib
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import unittest
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from absl.testing import absltest
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import jax
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from jax import config
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from jax._src import core
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from jax._src import test_util as jtu
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from jax._src.lib import xla_client as xc
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from jax._src.lib import xla_extension_version
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from jax.experimental import topologies
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from jax.experimental.pjit import pjit
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from jax.experimental.serialize_executable import (
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deserialize_and_load,
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serialize,
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)
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import jax.numpy as jnp
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from jax.sharding import PartitionSpec as P
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import numpy as np
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config.parse_flags_with_absl()
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prev_xla_flags = None
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with contextlib.suppress(ImportError):
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import pytest
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pytestmark = pytest.mark.multiaccelerator
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class JaxAotTest(jtu.JaxTestCase):
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@jtu.skip_on_devices('cpu', 'gpu')
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def test_pickle_pjit_lower(self):
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if jtu.is_se_tpu():
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raise unittest.SkipTest('StreamExecutor not supported.')
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def fun(x):
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return x * x
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with jax.sharding.Mesh(np.array(jax.devices()), ('data',)):
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lowered = pjit(
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fun, in_shardings=P('data'), out_shardings=P(None, 'data')
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).lower(core.ShapedArray(shape=(8, 8), dtype=np.float32))
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def verify_serialization(lowered):
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serialized, in_tree, out_tree = serialize(lowered.compile())
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compiled = deserialize_and_load(serialized, in_tree, out_tree)
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self.assertEqual(compiled.as_text(), lowered.compile().as_text())
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verify_serialization(lowered)
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verify_serialization(jax.jit(lambda x: x * x).lower(np.arange(100)))
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verify_serialization(
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jax.pmap(lambda x: x * x).lower(
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np.zeros((len(jax.devices()), 4), dtype=np.float32)))
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def test_topology_pjit_serialize(self):
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try:
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aot_topo = topologies.get_topology_desc(
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platform=jax.devices()[0].platform
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)
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except NotImplementedError:
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raise unittest.SkipTest('PJRT Topology not supported')
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if jtu.TEST_WITH_PERSISTENT_COMPILATION_CACHE.value:
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raise unittest.SkipTest('Compilation caching not yet supported.')
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@jax.jit
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def fn(x):
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return x * x
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def lower_and_load(mesh):
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s = jax.sharding.NamedSharding(mesh, P('x', 'y'))
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x_shape = jax.ShapeDtypeStruct(
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shape=(16, 16),
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dtype=jnp.dtype('float32'),
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sharding=s)
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lowered = fn.lower(x_shape)
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serialized, in_tree, out_tree = serialize(lowered.compile())
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compiled = deserialize_and_load(serialized, in_tree, out_tree)
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return compiled
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ref_topo = topologies.get_attached_topology()
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n = max(1, len(ref_topo.devices) // 2)
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mesh_shape = (len(ref_topo.devices) // n, n)
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ref_mesh = topologies.make_mesh(ref_topo, mesh_shape, ('x', 'y'))
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aot_mesh = topologies.make_mesh(aot_topo, mesh_shape, ('x', 'y'))
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self.assertEqual(
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lower_and_load(ref_mesh).as_text(), lower_and_load(aot_mesh).as_text()
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)
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@unittest.skipIf(xla_extension_version < 175, 'Test requires jaxlib 0.4.15')
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def test_get_topology_from_devices(self):
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try:
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aot_topo = topologies.get_topology_desc(
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platform=jax.devices()[0].platform
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)
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except NotImplementedError:
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raise unittest.SkipTest('PJRT Topology not supported')
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topo = xc.get_topology_for_devices(aot_topo.devices)
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self.assertEqual(
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topo.platform_version, aot_topo.devices[0].client.platform_version
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)
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if __name__ == '__main__':
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absltest.main(testLoader=jtu.JaxTestLoader())
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