6762ca15c4
The session returned by cached_session uses soft placement, something we don't want for XLA_* devices. With soft placement ops lacking XLA kernels silently fall back and run on the CPU, misleading us into thinking we have more test coverage than we actually do. With this test some tests (rightly) start failing because they were testing ops with dtypes the XLA kernels do not support. I've removed these dtypes from the tests. This CL partially addresses b/132430685. It stubs out "cached_session" and "test_session" to raise errors, so we have more confidence that the compiler is being exercised. However, we still use XLA_* devices to exercise XLA, which has a different code path than xla.compile and tpu.rewrite. This needs to be incrementally fixed. PiperOrigin-RevId: 248437673
104 lines
3.8 KiB
Python
104 lines
3.8 KiB
Python
# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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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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# http://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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# ==============================================================================
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"""Tests for the behavior of the auto-compilation pass."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import numpy as np
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from six.moves import xrange # pylint: disable=redefined-builtin
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from tensorflow.compiler.tests import xla_test
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from tensorflow.python.framework import constant_op
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from tensorflow.python.framework import dtypes
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from tensorflow.python.framework import ops
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from tensorflow.python.ops import array_ops
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from tensorflow.python.ops import math_ops
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from tensorflow.python.platform import googletest
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CPU_DEVICE = "/job:localhost/replica:0/task:0/cpu:0"
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class ClusteringTest(xla_test.XLATestCase):
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def testAdd(self):
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val1 = np.array([4, 3, 2, 1], dtype=np.float32)
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val2 = np.array([5, 6, 7, 8], dtype=np.float32)
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expected = val1 + val2
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with self.session():
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with self.test_scope():
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input1 = constant_op.constant(val1, name="const1")
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input2 = constant_op.constant(val2, name="const2")
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output = math_ops.add(input1, input2)
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result = self.evaluate(output)
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self.assertAllClose(result, expected, rtol=1e-3)
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def testAddFromCpuMultiple(self):
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val1 = np.array([4, 3, 2, 1]).astype(np.float32)
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val2 = np.array([5, 6, 7, 8]).astype(np.float32)
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expected = val1 + val2
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with self.session():
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with ops.device(CPU_DEVICE):
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input1 = constant_op.constant(val1, name="const1")
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input2 = constant_op.constant(val2, name="const2")
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with self.test_scope():
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output = math_ops.add(input1, input2)
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for _ in xrange(10):
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result = self.evaluate(output)
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self.assertAllClose(result, expected, rtol=1e-3)
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def testDeadlock(self):
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# Builds a graph of the form:
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# x -> y
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# | \
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# z -> w
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# where x and z are placed on the CPU and y and w are placed on the XLA
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# device. If y and w are clustered for compilation, then the graph will
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# deadlock since the clustered graph will contain a self-loop.
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with self.session() as sess:
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with ops.device(CPU_DEVICE):
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x = array_ops.placeholder(dtypes.float32, [2])
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with self.test_scope():
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y = x * 2
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with ops.device(CPU_DEVICE):
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z = y * y
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with self.test_scope():
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w = y + z
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result = sess.run(w, {x: [1.5, 0.5]})
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self.assertAllClose(result, [12., 2.], rtol=1e-3)
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def testHostMemory(self):
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with self.session() as sess:
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x = array_ops.placeholder(dtypes.int32)
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with self.test_scope():
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y = x + 1
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with ops.device(CPU_DEVICE):
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# Place a computation on the CPU, so y and w cannot be merged into the
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# same JIT compilation.
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z = y * 2
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with self.test_scope():
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# Argument 'y' is a non-constant output of a previous cluster. Make sure
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# it is properly copied to host memory so it can be used as a
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# compile-time constant input for this cluster.
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w = array_ops.reshape(z, y)
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result = sess.run(w, {x: [1, 0]})
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expected = np.array([[4], [2]], dtype=np.int32)
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self.assertAllClose(expected, result, rtol=1e-3)
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if __name__ == "__main__":
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googletest.main()
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