mirror of
https://github.com/zebrajr/pytorch.git
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8286ce1e3a
Summary: Closes https://github.com/caffe2/caffe2/pull/1260 Differential Revision: D5906739 Pulled By: Yangqing fbshipit-source-id: e482ba9ba60b5337d9165f28f7ec68d4518a0902
138 lines
5.4 KiB
Python
138 lines
5.4 KiB
Python
# Copyright (c) 2016-present, Facebook, Inc.
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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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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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from __future__ import unicode_literals
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import functools
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import hypothesis
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from hypothesis import given
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import hypothesis.strategies as st
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import numpy as np
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from caffe2.python import core
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import caffe2.python.hypothesis_test_util as hu
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class TestAdam(hu.HypothesisTestCase):
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@staticmethod
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def ref_adam(param, mom1, mom2, grad, LR, ITER,
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beta1, beta2, epsilon):
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t = ITER + 1
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corrected_local_rate = LR * np.sqrt(1 - np.power(beta2, t)) / \
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(1 - np.power(beta1, t))
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mom1_out = (beta1 * mom1) + (1 - beta1) * grad
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mom2_out = (beta2 * mom2) + (1 - beta2) * np.square(grad)
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param_out = param + corrected_local_rate * mom1_out / \
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(np.sqrt(mom2_out) + epsilon)
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return param_out, mom1_out, mom2_out
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@given(inputs=hu.tensors(n=4),
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ITER=st.integers(min_value=0, max_value=10000),
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LR=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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beta1=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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beta2=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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epsilon=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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**hu.gcs)
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def test_adam(self, inputs, ITER, LR, beta1, beta2, epsilon, gc, dc):
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param, mom1, mom2, grad = inputs
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ITER = np.array([ITER], dtype=np.int64)
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LR = np.array([LR], dtype=np.float32)
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op = core.CreateOperator(
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"Adam",
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["param", "mom1", "mom2", "grad", "lr", "iter"],
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["output_param", "output_mom1", "output_mom2"],
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beta1=beta1, beta2=beta2, epsilon=epsilon)
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# Iter lives on the CPU
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input_device_options = {'iter': hu.cpu_do}
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self.assertReferenceChecks(
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gc, op,
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[param, mom1, mom2, grad, LR, ITER],
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functools.partial(
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self.ref_adam,
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beta1=beta1, beta2=beta2, epsilon=epsilon),
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input_device_options=input_device_options)
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@given(inputs=hu.tensors(n=4),
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ITER=st.integers(min_value=0, max_value=10000),
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LR=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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beta1=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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beta2=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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epsilon=st.floats(min_value=0.01, max_value=0.99,
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allow_nan=False, allow_infinity=False),
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data_strategy=st.data(),
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**hu.gcs)
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def test_sparse_adam(self, inputs, ITER, LR, beta1, beta2, epsilon,
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data_strategy, gc, dc):
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param, mom1, mom2, grad = inputs
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mom1 = np.absolute(mom1)
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mom2 = np.absolute(mom2)
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ITER = np.array([ITER], dtype=np.int64)
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LR = np.array([LR], dtype=np.float32)
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# Create an indexing array containing values which index into grad
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indices = data_strategy.draw(
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hu.tensor(dtype=np.int64,
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elements=st.sampled_from(np.arange(grad.shape[0]))),
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)
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hypothesis.note('indices.shape: %s' % str(indices.shape))
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# For now, the indices must be unique
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hypothesis.assume(np.array_equal(np.unique(indices.flatten()),
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np.sort(indices.flatten())))
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# Sparsify grad
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grad = grad[indices]
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op = core.CreateOperator(
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"SparseAdam",
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["param", "mom1", "mom2", "indices", "grad", "lr", "iter"],
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["param", "mom1", "mom2"],
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beta1=beta1, beta2=beta2, epsilon=epsilon)
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def ref_sparse(param, mom1, mom2, indices, grad, LR, ITER):
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param_out = np.copy(param)
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mom1_out = np.copy(mom1)
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mom2_out = np.copy(mom2)
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for i, index in enumerate(indices):
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param_out[index], mom1_out[index], mom2_out[index] = \
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self.ref_adam(param[index], mom1[index], mom2[index],
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grad[i], LR, ITER,
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beta1, beta2, epsilon)
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return (param_out, mom1_out, mom2_out)
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# Iter lives on the CPU
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input_device_options = {'iter': hu.cpu_do}
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self.assertReferenceChecks(
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gc, op,
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[param, mom1, mom2, indices, grad, LR, ITER],
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ref_sparse,
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input_device_options=input_device_options)
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