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test: more gradient optimizer tests #1217
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Original file line number | Diff line number | Diff line change |
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@@ -1,5 +1,6 @@ | ||
using Microsoft.VisualStudio.TestTools.UnitTesting; | ||
using System; | ||
using System.Linq; | ||
using Tensorflow; | ||
using Tensorflow.NumPy; | ||
using static Tensorflow.Binding; | ||
|
@@ -67,6 +68,51 @@ public void TestBasic() | |
TestBasic<double>(); | ||
} | ||
|
||
private void TestMinimizeResourceVariable<T>() where T : struct | ||
{ | ||
var dtype = GetTypeForNumericType<T>(); | ||
|
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// train.GradientDescentOptimizer is V1 only API. | ||
tf.Graph().as_default(); | ||
using (var sess = self.cached_session()) | ||
{ | ||
var var0 = tf.Variable(new[,] { { 1.0f, 2.0f } }, dtype: dtype); | ||
var var1 = tf.Variable(new[] { 3.0 }, dtype: dtype); | ||
var x = tf.constant(new[,] { { 4.0f }, { 5.0f } }, dtype: dtype); | ||
|
||
var pred = math_ops.matmul(var0, x) + var1; | ||
var loss = pred * pred; | ||
var sgd_op = tf.train.GradientDescentOptimizer(3.0f).minimize(loss); | ||
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var global_variables = tf.global_variables_initializer(); | ||
sess.run(global_variables); | ||
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sess.run(new[] { var0, var1 }); | ||
// Fetch params to validate initial values | ||
self.assertAllCloseAccordingToType<T>(new[,] { { 1.0, 2.0 } }, self.evaluate<T[,]>(var0)); | ||
self.assertAllCloseAccordingToType(new[] { 3.0 }, self.evaluate<T[]>(var1)); | ||
// Run 1 step of sgd | ||
sgd_op.run(); | ||
// Validate updated params | ||
var np_pred = 1.0 * 4.0 + 2.0 * 5.0 + 3.0; | ||
var np_grad = 2 * np_pred; | ||
self.assertAllCloseAccordingToType( | ||
new[,] { { 1.0 - np_grad * 4.0, 2.0 - np_grad * 5.0 } }, | ||
self.evaluate<T[,]>(var0)); | ||
self.assertAllCloseAccordingToType( | ||
new[] { 3.0 - np_grad }, | ||
self.evaluate<T[]>(var1)); | ||
} | ||
} | ||
|
||
[TestMethod] | ||
public void TestMinimizeResourceVariable() | ||
{ | ||
//TODO: add np.half | ||
TestMinimizeResourceVariable<float>(); | ||
TestMinimizeResourceVariable<double>(); | ||
} | ||
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private void TestTensorLearningRate<T>() where T : struct | ||
{ | ||
var dtype = GetTypeForNumericType<T>(); | ||
|
@@ -115,5 +161,72 @@ public void TestTensorLearningRate() | |
TestTensorLearningRate<float>(); | ||
TestTensorLearningRate<double>(); | ||
} | ||
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public void TestGradWrtRef<T>() where T : struct | ||
{ | ||
var dtype = GetTypeForNumericType<T>(); | ||
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var graph = tf.Graph().as_default(); | ||
using (var sess = self.cached_session()) | ||
{ | ||
var opt = tf.train.GradientDescentOptimizer(3.0f); | ||
var values = new[] { 1.0, 3.0 }; | ||
var vars_ = values.Select( | ||
v => tf.Variable(new[] { v }, dtype: dtype) as IVariableV1 | ||
).ToList(); | ||
var grads_and_vars = opt.compute_gradients(tf.add(vars_[0], vars_[1]), vars_); | ||
sess.run(tf.global_variables_initializer()); | ||
foreach (var (grad, _) in grads_and_vars) | ||
self.assertAllCloseAccordingToType(new[] { 1.0 }, self.evaluate<T[]>(grad)); | ||
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} | ||
} | ||
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[TestMethod] | ||
public void TestGradWrtRef() | ||
{ | ||
TestGradWrtRef<float>(); | ||
TestGradWrtRef<double>(); | ||
} | ||
|
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public void TestWithGlobalStep<T>() where T : struct | ||
{ | ||
var dtype = GetTypeForNumericType<T>(); | ||
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tf.Graph().as_default(); | ||
using (var sess = self.cached_session()) | ||
{ | ||
var global_step = tf.Variable(0, trainable: false); | ||
var var0 = tf.Variable(new[] { 1.0, 2.0 }, dtype: dtype); | ||
var var1 = tf.Variable(new[] { 3.0, 4.0 }, dtype: dtype); | ||
var grads0 = tf.constant(new[] { 0.1, 0.1 }, dtype: dtype); | ||
var grads1 = tf.constant(new[] { 0.01, 0.01 }, dtype: dtype); | ||
var grads_and_vars = new[] { | ||
Tuple.Create(grads0, var0 as IVariableV1), | ||
Tuple.Create(grads1, var1 as IVariableV1) | ||
}; | ||
var sgd_op = tf.train.GradientDescentOptimizer(3.0f) | ||
.apply_gradients(grads_and_vars, global_step: global_step); | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. @AsakusaRinne why does |
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sess.run(tf.global_variables_initializer()); | ||
// Fetch params to validate initial values | ||
self.assertAllCloseAccordingToType(new[] { 1.0, 2.0 }, self.evaluate<T[]>(var0)); | ||
self.assertAllCloseAccordingToType(new[] { 3.0, 4.0 }, self.evaluate<T[]>(var1)); | ||
// Run 1 step of sgd | ||
sgd_op.run(); | ||
// Validate updated params and global_step | ||
self.assertAllCloseAccordingToType(new[] { 1.0 - 3.0 * 0.1, 2.0 - 3.0 * 0.1 }, self.evaluate<T[]>(var0)); | ||
self.assertAllCloseAccordingToType(new[] { 3.0 - 3.0 * 0.01, 4.0 - 3.0 * 0.01 }, self.evaluate<T[]>(var1)); | ||
Assert.AreEqual(1, self.evaluate<int>(global_step)); | ||
} | ||
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} | ||
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[TestMethod] | ||
public void TestWithGlobalStep() | ||
{ | ||
TestWithGlobalStep<float>(); | ||
TestWithGlobalStep<double>(); | ||
} | ||
} | ||
} |
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@Wanglongzhi2001 Hm, now it calculates but the test doesn't pass. However, the code corresponds to TensorFlow original test. I have to check math there.