150 lines
5.1 KiB
Python
150 lines
5.1 KiB
Python
import numpy as np
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import torch
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import unittest
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import itertools
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from tinygrad.tensor import Tensor, Device
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from extra.gradcheck import numerical_jacobian, jacobian, gradcheck
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x_init = np.random.randn(1,3).astype(np.float32)
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U_init = np.random.randn(3,3).astype(np.float32)
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V_init = np.random.randn(3,3).astype(np.float32)
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W_init = np.random.randn(3,3).astype(np.float32)
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m_init = np.random.randn(1,3).astype(np.float32)
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class TestTinygrad(unittest.TestCase):
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def test_plus_equals(self):
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a = Tensor.randn(10,10)
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b = Tensor.randn(10,10)
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c = a + b
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val1 = c.numpy()
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a += b
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val2 = a.numpy()
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np.testing.assert_allclose(val1, val2)
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def test_slicing(self):
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x = Tensor.randn(10,10)
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slices = [0,1,9,-1,-10,None] + [slice(s,e) for s,e in itertools.combinations([0,1,-1,None], r=2)] + [slice(9,11), slice(-11,-9)]
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fmt = lambda s: f'{s.start}:{s.stop}' if isinstance(s, slice) else str(s)
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for s in list(itertools.product(slices, slices)) + [(None,0,None,0,None), (slice(0,2),None,None,slice(2,4),None,None)]:
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np.testing.assert_equal(x.numpy()[s], x[s].numpy(), f'Test failed for slice x[{",".join(fmt(x) for x in s)}]')
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for s in [-11,10]:
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with self.assertRaises(IndexError):
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x[s]
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with self.assertRaises(AssertionError):
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x[::2]
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with self.assertRaises(AssertionError):
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x[0,0,0]
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def test_backward_pass(self):
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def test_tinygrad():
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x = Tensor(x_init, requires_grad=True)
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W = Tensor(W_init, requires_grad=True)
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m = Tensor(m_init)
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out = x.dot(W).relu()
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out = out.logsoftmax()
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out = out.mul(m).add(m).sum()
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out.backward()
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return out.cpu().data, x.grad.cpu().data, W.grad.cpu().data
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def test_pytorch():
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x = torch.tensor(x_init, requires_grad=True)
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W = torch.tensor(W_init, requires_grad=True)
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m = torch.tensor(m_init)
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out = x.matmul(W).relu()
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out = torch.nn.functional.log_softmax(out, dim=1)
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out = out.mul(m).add(m).sum()
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out.backward()
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return out.detach().numpy(), x.grad, W.grad
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for x,y in zip(test_tinygrad(), test_pytorch()):
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np.testing.assert_allclose(x, y, atol=1e-5)
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def test_backward_pass_diamond_model(self):
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def test_tinygrad():
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u = Tensor(U_init, requires_grad=True)
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v = Tensor(V_init, requires_grad=True)
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w = Tensor(W_init, requires_grad=True)
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x = u.mul(v).relu()
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y = u.mul(w).relu()
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out = x.add(y).mul(y).relu()
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out = out.logsoftmax()
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out = out.sum()
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out.backward()
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return out.cpu().data, u.cpu().grad.data, v.cpu().grad.data, w.cpu().grad.data
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def test_pytorch():
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u = torch.tensor(U_init, requires_grad=True)
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v = torch.tensor(V_init, requires_grad=True)
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w = torch.tensor(W_init, requires_grad=True)
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x = u.mul(v).relu()
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y = u.mul(w).relu()
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out = x.add(y).mul(y).relu()
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out = torch.nn.functional.log_softmax(out, dim=1)
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out = out.sum()
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out.backward()
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return out.detach().numpy(), u.grad, v.grad, w.grad
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for x,y in zip(test_tinygrad(), test_pytorch()):
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np.testing.assert_allclose(x, y, atol=1e-5)
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def test_nograd(self):
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x = Tensor(x_init, requires_grad=False)
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m = Tensor(m_init, requires_grad=False)
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W = Tensor(W_init, requires_grad=True)
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tmp = x.mul(m)
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mm = tmp.matmul(W)
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out = mm.relu()
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out = out.sum()
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out.backward()
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assert x.grad is None
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assert m.grad is None
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assert tmp.grad is None
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assert mm.grad is not None
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assert W.grad is not None
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def test_dropout(self):
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Tensor.training = True
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n, rate = 1_000_000, 0.1
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w = Tensor.ones(n).dropout(rate)
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non_zeros = np.count_nonzero(w.cpu().data)
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expected = n * (1 - rate)
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np.testing.assert_allclose(non_zeros, expected, rtol=1e-3)
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#@unittest.skipUnless(Device.DEFAULT == Device.CPU, "float64 not supported on GPU")
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@unittest.skip("float64 support broken")
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def test_jacobian(self):
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W = np.random.RandomState(1337).random((10, 5))
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x = np.random.RandomState(7331).random((1, 10)) - 0.5
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torch_x = torch.tensor(x, requires_grad=True)
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torch_W = torch.tensor(W, requires_grad=True)
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torch_func = lambda x: torch.nn.functional.log_softmax(x.matmul(torch_W).relu(), dim=1)
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PJ = torch.autograd.functional.jacobian(torch_func, torch_x).squeeze().numpy()
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tiny_x = Tensor(x)
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tiny_W = Tensor(W)
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tiny_func = lambda x: x.dot(tiny_W).relu().logsoftmax()
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J = jacobian(tiny_func, tiny_x)
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NJ = numerical_jacobian(tiny_func, tiny_x)
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np.testing.assert_allclose(PJ, J, atol = 1e-5)
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np.testing.assert_allclose(PJ, NJ, atol = 1e-5)
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#@unittest.skipUnless(Device.DEFAULT == Device.CPU, "float64 not supported on GPU")
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@unittest.skip("float64 support broken")
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def test_gradcheck(self):
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W = np.random.RandomState(1337).random((10, 5))
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x = np.random.RandomState(7331).random((1, 10)) - 0.5
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tiny_x = Tensor(x)
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tiny_W = Tensor(W)
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tiny_func = lambda x: x.dot(tiny_W).relu().logsoftmax()
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self.assertTrue(gradcheck(tiny_func, tiny_x))
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# coarse approx. since a "big" eps and the non-linearities of the model
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self.assertFalse(gradcheck(tiny_func, tiny_x, eps = 0.1))
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if __name__ == '__main__':
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unittest.main()
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