| import contextlib |
| import unittest |
| import torch |
| import torch.nn.parallel as dp |
| from common_cuda import TEST_MULTIGPU, TEST_CUDA |
| from common_utils import run_tests, TestCase, skipIfRocm, repeat_test_for_types, ALL_TENSORTYPES |
| |
| class TestDataParallel(TestCase): |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_buffers_requiring_grad(self): |
| class TestModule(nn.Module): |
| def __init__(self, t): |
| super(TestModule, self).__init__() |
| self.register_buffer('t_rg', t) |
| self.register_buffer('t_not_rg', t.clone().detach()) |
| |
| def forward(self, x): |
| return x * self.t_rg + self.t_not_rg |
| |
| m = TestModule(torch.randn(100, device='cuda', requires_grad=True)) |
| self.assertTrue(m.t_rg.requires_grad) |
| |
| dpm = nn.DataParallel(m, [0, 1]) |
| inp = torch.randn(2, 100, device='cuda') |
| |
| def fn(t): |
| return dpm(inp) |
| |
| torch.autograd.gradcheck(fn, (m.t_rg,)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_rnn(self): |
| |
| class TestModule(torch.nn.Module): |
| |
| def __init__(self): |
| super(TestModule, self).__init__() |
| self.rnn = torch.nn.LSTM(300, 1024, 1, batch_first=True, bidirectional=True) |
| |
| def forward(self, x): |
| self.rnn.flatten_parameters() |
| return self.rnn(x) |
| |
| def step(model): |
| opt = torch.optim.SGD(model.parameters(), lr=0.1) |
| input = torch.ones(4, 4, 300).to(0) |
| output = model(input) |
| loss = F.mse_loss(output[0], torch.zeros_like(output[0])) |
| loss.backward() |
| opt.step() |
| |
| with torch.no_grad(): |
| model = TestModule().to(0) |
| model_dp = torch.nn.DataParallel(deepcopy(model)) |
| |
| # make sure DP does not crash when grad is disabled. |
| # See #21108 |
| model_dp(torch.rand(2, 4, 300).to(0)) |
| |
| step(model) |
| step(model_dp) |
| |
| for p1, p2 in zip(model.parameters(), model_dp.parameters()): |
| p1.allclose(p2) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_parallel_apply(self): |
| l1 = nn.Linear(10, 5).to("cuda:0", torch.float) |
| l2 = nn.Linear(10, 5).to("cuda:1", torch.float) |
| i1 = torch.randn(2, 10, device="cuda:0", dtype=torch.float) |
| i2 = torch.randn(2, 10, device="cuda:1", dtype=torch.float) |
| expected1 = l1(i1).data |
| expected2 = l2(i2).data |
| modules = (l1, l2) |
| expected_outputs = (expected1, expected2) |
| |
| # each input can be either a collection of positional arguments |
| # or an object representing the single argument |
| for inputs in [((i1,), (i2,)), (i1, i2)]: |
| outputs = dp.parallel_apply(modules, inputs, None) |
| for out, expected in zip(outputs, expected_outputs): |
| self.assertEqual(out.data, expected) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| def test_parallel_apply_passes_exception(self): |
| # we define and instantiate a module that will throw a KeyError |
| class TestModule(nn.Module): |
| |
| def forward(self, *args): |
| return {}['wonderful'] |
| |
| l1 = TestModule().to("cuda", torch.float) |
| # and check that parallel_apply passes on the exception |
| # (we can use a single device twice for this test) |
| with self.assertRaisesRegex(KeyError, |
| 'Caught KeyError in replica \\d ' |
| 'on device 0.\nOriginal Traceback' |
| '[\\s\\S]+wonderful'): |
| dp.parallel_apply(modules=(l1, l1), inputs=(None, None)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_multiple_input(self): |
| class TestModule(nn.Module): |
| |
| def forward(self, var1, var2, float1, var3=None): |
| if var3 is None: |
| return float1 * (var1 * var2) |
| else: |
| return float1 * (var1 * var2 + var3) |
| |
| m = TestModule() |
| var1 = torch.randn(5, 5, dtype=torch.float, requires_grad=True) |
| var2 = torch.randn(5, 5, dtype=torch.float, requires_grad=True) |
| var3 = torch.randn(5, 5, dtype=torch.float, requires_grad=False) |
| |
| float1 = torch.randn(1).item() |
| |
| expected = m(var1, var2, float1) |
| loss = expected.sum() |
| loss.backward() |
| gvar1_exp = var1.grad.clone() |
| gvar2_exp = var2.grad.clone() |
| |
| def local_test(out): |
| var1.grad.data.fill_(0.0) |
| var2.grad.data.fill_(0.0) |
| loss = out.sum() |
| loss.backward() |
| self.assertEqual(out, expected) |
| self.assertEqual(gvar1_exp, var1.grad) |
| self.assertEqual(gvar2_exp, var2.grad) |
| |
| out = dp.data_parallel(m, (var1, var2, float1), (0, 1)) |
| local_test(out) |
| |
| out = dp.data_parallel(m, (var1, var2, float1), (1, 0)) |
| local_test(out) |
| |
| out = dp.data_parallel(m, (var1, var2, float1), (0,)) |
| local_test(out) |
| |
| var1.grad.data.fill_(0.0) |
| var2.grad.data.fill_(0.0) |
| expected = m(var1, var2, float1, var3=var3) |
| loss = expected.sum() |
| loss.backward() |
| gvar1_exp = var1.grad.clone() |
| gvar2_exp = var2.grad.clone() |
| |
| dpm = nn.DataParallel(TestModule()) |
| out = dpm(var1, var2, float1, var3=var3) |
| local_test(out) |
| |
| dpm = nn.DataParallel(TestModule(), device_ids=[0]) |
| out = dpm(var1, var2, float1, var3=var3) |
| local_test(out) |
| |
| kwarg_wrap = {'var3': var3} |
| out = dp.data_parallel( |
| m, (var1, var2, float1), (0, 1), module_kwargs=kwarg_wrap) |
| local_test(out) |
| |
| out = dp.data_parallel( |
| m, (var1, var2, float1), (0,), module_kwargs=kwarg_wrap) |
| local_test(out) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_small_back(self): |
| l = nn.Linear(10, 5).float().cuda() |
| i = torch.randn(20, 10, dtype=torch.float, device="cuda") |
| out = dp.data_parallel(l, i, (0, 1)) |
| self.assertEqual(out, l(i)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_model_device(self): |
| r"""Test device[0] check at forward time. |
| """ |
| l = nn.Linear(2, 2) |
| inp = torch.randn(2, 2) |
| inp_cuda0 = inp.cuda(0) |
| inp_cuda1 = inp.cuda(1) |
| |
| error_msg = "module must have its parameters and buffers on device {}" |
| |
| @contextlib.contextmanager |
| def dummy_ctx_manager(): |
| yield |
| |
| def test(inner_m, dp_device, inp, device_ids, should_fail): |
| if device_ids is None: |
| device_ids = list(range(torch.cuda.device_count())) |
| |
| if isinstance(device_ids[0], torch.device): |
| expect_device = device_ids[0] |
| else: |
| expect_device = torch.device("cuda:{}".format(device_ids[0])) |
| |
| if should_fail: |
| def assert_correct(): |
| return self.assertRaisesRegex(RuntimeError, error_msg.format(expect_device)) |
| else: |
| assert_correct = dummy_ctx_manager |
| |
| # test DataParallel module |
| dpm = nn.DataParallel(inner_m, device_ids) |
| if dp_device is not None: |
| dpm = dpm.to(dp_device) |
| |
| with assert_correct(): |
| dpm(inp) |
| |
| # test functional |
| with assert_correct(): |
| nn.parallel.data_parallel(inner_m.to(dp_device), inp, device_ids) |
| |
| test(l.to('cpu'), None, inp, None, should_fail=True) |
| test(l.cuda(1), None, inp_cuda0, None, should_fail=True) |
| test(l.cuda(), None, inp_cuda0, [1, 0], should_fail=True) |
| |
| test(l.cuda(), None, inp_cuda0, None, should_fail=False) |
| test(l.cpu(), 'cuda', inp_cuda0, None, should_fail=False) |
| test(l.cuda(1), None, inp_cuda1, [1, 0], should_fail=False) |
| test(l.cpu(), 'cuda:1', inp_cuda1, [1, 0], should_fail=False) |
| |
| s = nn.Sequential(l.cpu()) |
| test(s, None, inp, None, should_fail=True) |
| test(s, None, inp, [0, 1], should_fail=True) |
| test(s, None, inp, [1, 0], should_fail=True) |
| |
| s = nn.Sequential(deepcopy(l).cpu(), l.cuda()) |
| test(s, None, inp, None, should_fail=True) |
| test(s, None, inp, [0, 1], should_fail=True) |
| test(s, None, inp, [1, 0], should_fail=True) |
| |
| s = nn.Sequential(l.cuda(), deepcopy(l).cuda(1)) |
| test(s, None, inp, None, should_fail=True) |
| test(s, None, inp, [0, 1], should_fail=True) |
| test(s, None, inp, [1, 0], should_fail=True) |
| |
| s = nn.Sequential(l.cuda(), deepcopy(l).cuda()) |
| test(s, None, inp, None, should_fail=False) |
| test(s, None, inp, [0, 1], should_fail=False) |
| test(s, None, inp, [1, 0], should_fail=True) |
| test(s.cpu(), None, inp, [1, 0], should_fail=True) |
| test(s.cuda(1), None, inp, [1, 0], should_fail=False) |
| |
| @unittest.skipIf(not TEST_MULTIGPU or not PY3, "multi-GPU not supported") |
| @skipIfRocm |
| def test_data_parallel_model_no_refcycles(self): |
| # Python 2.7 will create reference cycles with the following |
| # Module on multiple GPUs, but Python 3 shouldn't unless |
| # there are refcycles on the PyTorch side (or the defined module) |
| import gc |
| |
| class Model(nn.Module): |
| def __init__(self): |
| super(Model, self).__init__() |
| self.linear = nn.Linear(1, 1) |
| |
| def forward(self, x): |
| return self.linear(x) |
| |
| gc.collect() |
| model = nn.DataParallel(Model().cuda()) |
| data = torch.randn(1, device="cuda") |
| model(data) |
| |
| refcycles = gc.collect() |
| self.assertEqual(refcycles, 0) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_no_grad(self): |
| test = self |
| |
| class Layer(nn.Module): |
| def forward(self, x): |
| test.assertFalse(torch.is_grad_enabled()) |
| return x |
| |
| l = Layer() |
| i = torch.randn(20, 10, dtype=torch.float, device="cuda") |
| with torch.no_grad(): |
| dp.data_parallel(l, i, (0, 1)) |
| self.assertRaises(AssertionError, lambda: dp.data_parallel(l, i, (0, 1))) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel(self): |
| l = nn.Linear(10, 5).float().cuda() |
| i = torch.randn(20, 10, dtype=torch.float, device="cuda:1") |
| l.cuda(1) |
| expected_out = l(i) |
| loss = expected_out.sum() |
| loss.backward() |
| expected_grads = [] |
| for param in l.parameters(): |
| expected_grads.append(param.grad.clone()) |
| dev_ids_list = [(0, 1), (1, 0)] |
| for dev_id in dev_ids_list: |
| with torch.cuda.device(dev_id[0]): |
| l.cuda() |
| l.zero_grad() |
| out = dp.data_parallel(l, i, dev_id) |
| loss = out.sum() |
| loss.backward() |
| self.assertEqual(out.get_device(), dev_id[0]) |
| self.assertEqual(out.data, expected_out.data) |
| for expected, param in zip(expected_grads, l.parameters()): |
| self.assertEqual(param.grad.data, expected.data) |
| |
| # Check for None device_ids |
| l = l.cuda() |
| out = dp.data_parallel(l, i) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_sparse(self): |
| l = nn.Embedding(10, 5, sparse=True).to("cuda:1") |
| i = torch.randint(10, (20, 5), device="cuda:1", dtype=torch.long) |
| expected_out = l(i) |
| loss = expected_out.sum() |
| loss.backward() |
| expected_grads = [] |
| for param in l.parameters(): |
| expected_grads.append(param.grad.clone()) |
| dev_ids_list = [(0, 1), (1, 0)] |
| for dev_id in dev_ids_list: |
| with torch.cuda.device(dev_id[0]): |
| l.cuda() |
| l.zero_grad() |
| out = dp.data_parallel(l, i, dev_id) |
| loss = out.sum() |
| loss.backward() |
| self.assertEqual(out.get_device(), dev_id[0]) |
| self.assertEqual(out.data, expected_out.data) |
| for expected, param in zip(expected_grads, l.parameters()): |
| self.assertEqual(param.grad.data, expected.data) |
| |
| # Check for None device_ids |
| l = l.cuda() |
| out = dp.data_parallel(l, i) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_nested_output(self): |
| def fn(input): |
| return [ |
| input, (input.sin(), input.cos(), [input.add(1)]), input, |
| OrderedDict(a=input, b=[input.sin()]) |
| ] |
| |
| class Net(nn.Module): |
| def forward(self, input): |
| return fn(input) |
| |
| i = torch.randn(2, 2).float().cuda(1) |
| gpus = range(torch.cuda.device_count()) |
| output = dp.data_parallel(Net(), i, gpus) |
| self.assertEqual(output, fn(i)) |
| self.assertIsInstance(output[0], torch.Tensor) |
| self.assertIsInstance(output[1], tuple) |
| self.assertIsInstance(output[1][0], torch.Tensor) |
| self.assertIsInstance(output[1][1], torch.Tensor) |
| self.assertIsInstance(output[1][2], list) |
| self.assertIsInstance(output[1][2][0], torch.Tensor) |
| self.assertIsInstance(output[2], torch.Tensor) |
| self.assertIsInstance(output[3], dict) |
| self.assertEqual(len(output[3]), 2) |
| self.assertIn('a', output[3]) |
| self.assertIn('b', output[3]) |
| self.assertIsInstance(output[3]['a'], torch.Tensor) |
| self.assertIsInstance(output[3]['b'], list) |
| self.assertIsInstance(output[3]['b'][0], torch.Tensor) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_nested_input(self): |
| def fn(input): |
| return input[1][0] |
| |
| class Net(nn.Module): |
| def forward(self, *input): |
| return fn(input) |
| |
| i = torch.randn(20, 3, dtype=torch.float, device="cuda:1") |
| input = (i.cos(), (i.sin(), i), i.sin()) |
| gpus = range(torch.cuda.device_count()) |
| output = dp.data_parallel(Net(), input, gpus) |
| self.assertEqual(output, fn(input)) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| @repeat_test_for_types(ALL_TENSORTYPES) |
| def test_data_parallel_module(self, dtype=torch.float): |
| l = nn.Linear(10, 5).to("cuda", dtype) |
| i = torch.randn(20, 10, device="cuda", dtype=dtype) |
| expected_out = l(i).data |
| net = nn.DataParallel(l) |
| out = net(i) |
| self.assertEqual(out.get_device(), 0) |
| self.assertEqual(out.data, expected_out, dtype2prec[dtype]) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| @repeat_test_for_types(ALL_TENSORTYPES) |
| def test_data_parallel_module_kwargs_only(self, dtype=torch.float): |
| class Net(nn.Module): |
| def __init__(self): |
| super(Net, self).__init__() |
| self.l = l |
| |
| def forward(self, input): |
| return self.l(input) |
| |
| l = nn.Linear(10, 5).to("cuda", dtype) |
| i = torch.randn(20, 10, device="cuda", dtype=dtype) |
| expected_out = l(i).data |
| n = nn.DataParallel(Net()) |
| out = n(input=i) |
| self.assertEqual(out.get_device(), 0) |
| self.assertEqual(out.data, expected_out, dtype2prec[dtype]) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| @repeat_test_for_types(ALL_TENSORTYPES) |
| def test_data_parallel_module_kwargs_only_empty_list(self, dtype=torch.float): |
| class Net(nn.Module): |
| def __init__(self): |
| super(Net, self).__init__() |
| self.l = l |
| |
| def forward(self, input): |
| return self.l(input['data']) |
| |
| l = nn.Linear(10, 5).to("cuda", dtype) |
| i = torch.randn(20, 10, device="cuda", dtype=dtype) |
| expected_out = l(i).data |
| n = nn.DataParallel(Net()) |
| out = n(input={'data': i, 'unused': []}) |
| self.assertEqual(out.get_device(), 0) |
| self.assertEqual(out.data, expected_out, dtype2prec[dtype]) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| @repeat_test_for_types(ALL_TENSORTYPES) |
| def test_data_parallel_module_kwargs_only_empty_dict(self, dtype=torch.float): |
| class Net(nn.Module): |
| def __init__(self): |
| super(Net, self).__init__() |
| self.l = l |
| |
| def forward(self, input): |
| return self.l(input['data']) |
| |
| l = nn.Linear(10, 5).to("cuda", dtype) |
| i = torch.randn(20, 10, device="cuda", dtype=dtype) |
| expected_out = l(i).data |
| n = nn.DataParallel(Net()) |
| out = n(input={'data': i, 'unused': {}}) |
| self.assertEqual(out.get_device(), 0) |
| self.assertEqual(out.data, expected_out, dtype2prec[dtype]) |
| |
| @unittest.skipIf(not TEST_CUDA, "CUDA unavailable") |
| @repeat_test_for_types(ALL_TENSORTYPES) |
| def test_data_parallel_module_kwargs_only_empty_tuple(self, dtype=torch.float): |
| class Net(nn.Module): |
| def __init__(self): |
| super(Net, self).__init__() |
| self.l = l |
| |
| def forward(self, input): |
| return self.l(input['data']) |
| |
| l = nn.Linear(10, 5).to("cuda", dtype) |
| i = torch.randn(20, 10, device="cuda", dtype=dtype) |
| expected_out = l(i).data |
| n = nn.DataParallel(Net()) |
| out = n(input={'data': i, 'unused': ()}) |
| self.assertEqual(out.get_device(), 0) |
| self.assertEqual(out.data, expected_out, dtype2prec[dtype]) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_device_args(self): |
| cuda0 = torch.device('cuda:0') |
| cuda1 = torch.device('cuda:1') |
| |
| # test output_device |
| l = nn.Linear(10, 5).to(cuda0, torch.float) |
| i = torch.randn(20, 10, dtype=torch.float, device=cuda0, requires_grad=True) |
| out = dp.data_parallel(l, i, device_ids=(0, 1), output_device=cuda0) |
| self.assertEqual(out, l(i)) |
| |
| # test device_ids |
| l = nn.Linear(10, 5).to(cuda0, torch.float) |
| i = torch.randn(20, 10, dtype=torch.float, device=cuda0, requires_grad=True) |
| out = dp.data_parallel(l, i, device_ids=(cuda0, cuda1), output_device=cuda0) |
| self.assertEqual(out, l(i)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_data_parallel_function_deletion(self): |
| # this test case is originated from #16532 |
| def gradient_penalty(net, x): |
| output = net(x) |
| loss = torch.autograd.grad( |
| outputs=output, inputs=x, |
| grad_outputs=x.new_ones(output.size()), |
| create_graph=True, retain_graph=True)[0].mean() |
| return loss |
| |
| net = nn.Linear(4, 1).cuda() |
| dpn = nn.DataParallel(net, [0, 1]) |
| x = torch.ones(2, 4, requires_grad=True).cuda() |
| |
| dpn.zero_grad() |
| loss = gradient_penalty(dpn, x) |
| loss.backward() |
| grads = [p.grad for p in net.parameters()] |
| self.assertEqual(2, len(grads)) |
| self.assertEqual( |
| torch.tensor([[0.25, 0.25, 0.25, 0.25]], device='cuda:0'), |
| grads[0]) |
| self.assertEqual(torch.tensor([0.0], device='cuda:0'), grads[1]) |
| |
| def _test_scatter(self, tensor): |
| x = tensor.detach().requires_grad_() |
| result = dp.scatter(x, (0, 1)) |
| self.assertEqual(len(result), 2) |
| self.assertEqual(result[0], x[:2]) |
| self.assertEqual(result[0].get_device(), 0) |
| self.assertEqual(result[1], x[2:]) |
| self.assertEqual(result[1].get_device(), 1) |
| grad = result[0].data.clone().fill_(2) |
| result[0].backward(grad) |
| self.assertEqual(x.grad.data[:2], grad) |
| self.assertEqual(x.grad.data[2:], grad.clone().zero_()) |
| _assertGradAndGradgradChecks(self, lambda y: dp.scatter(y, (0, 1)), (x,)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_scatter_cpu(self): |
| self._test_scatter(torch.randn(4, 4)) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_scatter_gpu(self): |
| self._test_scatter(torch.randn(4, 4).cuda()) |
| |
| def _test_gather(self, output_device): |
| inputs = ( |
| torch.randn(2, 4, device='cuda:0', requires_grad=True), |
| torch.randn(2, 4, device='cuda:1', requires_grad=True), |
| ) |
| result = dp.gather(inputs, output_device) |
| self.assertEqual(result.size(), torch.Size([4, 4])) |
| self.assertEqual(result[:2], inputs[0]) |
| self.assertEqual(result[2:], inputs[1]) |
| if output_device != -1: |
| self.assertEqual(result.get_device(), output_device) |
| else: |
| self.assertFalse(result.is_cuda) |
| grad = torch.randn(4, 4) |
| if output_device != -1: |
| grad = grad.cuda(output_device) |
| result.backward(grad) |
| self.assertEqual(inputs[0].grad.data, grad[:2]) |
| self.assertEqual(inputs[1].grad.data, grad[2:]) |
| _assertGradAndGradgradChecks(self, lambda x, y: dp.gather((x, y), output_device), inputs) |
| |
| # test scalar inputs, should stack into a vector in this case |
| inputs = ( |
| torch.randn((), device='cuda:0', requires_grad=True), |
| torch.randn((), device='cuda:1', requires_grad=True), |
| ) |
| result = dp.gather(inputs, output_device) |
| self.assertEqual(result.size(), torch.Size([2])) |
| self.assertEqual(result[0], inputs[0]) |
| self.assertEqual(result[1], inputs[1]) |
| if output_device != -1: |
| self.assertEqual(result.get_device(), output_device) |
| else: |
| self.assertFalse(result.is_cuda) |
| grad = torch.randn(2) |
| if output_device != -1: |
| grad = grad.cuda(output_device) |
| result.backward(grad) |
| self.assertEqual(inputs[0].grad, grad[0]) |
| self.assertEqual(inputs[1].grad, grad[1]) |
| _assertGradAndGradgradChecks(self, lambda x, y: dp.gather((x, y), output_device), inputs) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_gather_cpu(self): |
| self._test_gather(-1) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_gather_gpu(self): |
| self._test_gather(0) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_gather_different_len_dicts(self): |
| inputs = ( |
| {'a': torch.randn(1, 2, requires_grad=True, device="cuda:0")}, |
| { |
| 'b': torch.randn(1, 2, requires_grad=True, device="cuda:1"), |
| 'a': torch.randn(1, 2, requires_grad=True, device="cuda:1"), |
| } |
| ) |
| with self.assertRaises(ValueError): |
| _ = dp.gather(inputs, target_device=0) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_replicate(self): |
| module = nn.Linear(10, 5).float().cuda() |
| input = torch.randn(2, 10, dtype=torch.float, device="cuda") |
| expected_output = module(input).data |
| for devices in [(0, 1), [0, 1]]: |
| replicas = dp.replicate(module, devices) |
| for i, replica in enumerate(replicas): |
| for p in replica.parameters(): |
| self.assertEqual(p.get_device(), i) |
| replica_input = input.cuda(i) |
| self.assertEqual(replica(replica_input).data, expected_output) |
| |
| @unittest.skipIf(not TEST_MULTIGPU, "multi-GPU not supported") |
| def test_replicate_buffers(self): |
| net = nn.Module() |
| net.bn = nn.BatchNorm2d(10) |
| net.cuda() |
| for devices in [(0, 1), [0, 1]]: |
| replicas = dp.replicate(net, devices) |
| for i, replica in enumerate(replicas): |
| self.assertEqual(replica.bn.running_mean.get_device(), i, 'buffer on wrong device') |
| self.assertEqual(replica.bn.running_var.get_device(), i, 'buffer on wrong device') |
| self.assertEqual(replica.bn.num_batches_tracked.get_device(), i, 'buffer on wrong device') |
| |
| |
| |
| if __name__ == '__main__': |
| run_tests() |
