mirror of https://github.com/commaai/tinygrad.git
76 lines
2.4 KiB
Python
76 lines
2.4 KiB
Python
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#!/usr/bin/env python
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import unittest
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import numpy as np
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import tensorflow as tf
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import tensorflow_addons as tfa
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from tinygrad.tensor import Tensor
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from tinygrad.nn.optim import LAMB
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np.random.seed(1337)
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x_init = np.random.randn(1,4).astype(np.float32)
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W_init = np.random.randn(4,4).astype(np.float32)
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m_init = np.random.randn(1,4).astype(np.float32)
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class TinyNet():
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def __init__(self):
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self.x = Tensor(x_init.copy(), requires_grad=True)
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self.W = Tensor(W_init.copy(), requires_grad=True)
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self.m = Tensor(m_init.copy())
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def forward(self):
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out = self.x.matmul(self.W).relu()
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out = out.log_softmax(1)
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out = out.mul(self.m).add(self.m).sum()
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return out
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class TinyNetTF():
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def __init__(self):
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self.x = tf.Variable(x_init.copy(), trainable=True)
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self.W = tf.Variable(W_init.copy(), trainable=True)
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self.m = tf.constant(m_init.copy())
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def forward(self):
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out = tf.matmul(self.x, self.W)
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out = tf.nn.relu(out)
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out = tf.nn.log_softmax(out, axis=1)
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out = tf.multiply(out, self.m) + self.m
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out = tf.reduce_sum(out)
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return out
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def step(optim, steps=1, kwargs={}):
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net = TinyNet()
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optim = optim([net.x, net.W], **kwargs)
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for _ in range(steps):
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out = net.forward()
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optim.zero_grad()
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out.backward()
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optim.step()
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return net.x.detach().numpy(), net.W.detach().numpy()
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def step_tf(optim, steps=1, kwargs={}):
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net = TinyNetTF()
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optim = optim(**kwargs)
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for _ in range(steps):
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with tf.GradientTape() as tape:
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out = net.forward()
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grads = tape.gradient(out, [net.x, net.W])
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optim.apply_gradients(zip(grads, [net.x, net.W]))
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return net.x.numpy(), net.W.numpy()
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class ExternalTestOptim(unittest.TestCase):
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def _test_optim(self, tinygrad_optim, tensorflow_optim, steps, opts, atol, rtol):
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for x,y in zip(step(tinygrad_optim, steps, kwargs=opts),
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step_tf(tensorflow_optim, steps, kwargs=opts)):
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np.testing.assert_allclose(x, y, atol=atol, rtol=rtol)
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def _test_lamb(self, steps, opts, atol, rtol): self._test_optim(LAMB, tfa.optimizers.LAMB, steps, opts, atol, rtol)
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def test_lamb(self): self._test_lamb(1, {'lr': 0.001}, 1e-5, 0)
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def test_lamb_high_lr(self): self._test_lamb(1, {'lr': 10}, 1e-5, 1e-5)
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def test_multistep_lamb(self): self._test_lamb(10, {'lr': 0.001}, 1e-5, 0)
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def test_multistep_lamb_high_lr(self): self._test_lamb(10, {'lr': 10}, 1e-5, 3e-4)
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if __name__ == '__main__':
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unittest.main()
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