Feat oneflow as backend of torch

python/oneflow/test/graph/test_graph_interplay.py

@@ -0,0 +1,170 @@
+"""
+Copyright 2020 The OneFlow Authors. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+import os
+import unittest
+import numpy as np
+
+import oneflow.unittest
+
+
+def _test_relu(test_case, device):
+    from typing import List
+    import torch
+    from oneflow.utils.backend.torch_compile import register_oneflowc
+
+    input_arr = np.array(
+        [
+            [-0.94630778, -0.83378579, -0.87060891],
+            [2.0289922, -0.28708987, -2.18369248],
+            [0.35217619, -0.67095644, -1.58943879],
+            [0.08086036, -1.81075924, 1.20752494],
+            [0.8901075, -0.49976737, -1.07153746],
+            [-0.44872912, -1.07275683, 0.06256855],
+            [-0.22556897, 0.74798368, 0.90416439],
+            [0.48339456, -2.32742195, -0.59321527],
+        ],
+        dtype=np.float32,
+    )
+    x = torch.tensor(input_arr, device=device)
+    eager_out = torch.relu(x)
+
+    @torch.compile(backend="oneflowc")
+    def fn(x):
+        y = torch.relu(x)
+        return y
+
+    compile_out = fn(x)
+    test_case.assertTrue(
+        np.allclose(
+            compile_out.cpu().detach().numpy(),
+            eager_out.cpu().detach().numpy(),
+            1e-05,
+            1e-05,
+        )
+    )
+    compile_out = fn(x)
+    test_case.assertTrue(
+        np.allclose(
+            compile_out.cpu().detach().numpy(),
+            eager_out.cpu().detach().numpy(),
+            1e-05,
+            1e-05,
+        )
+    )
+
+
+def _test_linear(test_case, device):
+    from typing import List
+    import torch
+    from torch._dynamo.backends.registry import register_backend
+    from torch._dynamo.backends.common import fake_tensor_unsupported
+
+    linear = torch.nn.Linear(3, 8, False)
+    linear = linear.to(device)
+    input_arr = np.array(
+        [
+            [-0.94630778, -0.83378579, -0.87060891],
+            [2.0289922, -0.28708987, -2.18369248],
+            [0.35217619, -0.67095644, -1.58943879],
+            [0.08086036, -1.81075924, 1.20752494],
+            [0.8901075, -0.49976737, -1.07153746],
+            [-0.44872912, -1.07275683, 0.06256855],
+            [-0.22556897, 0.74798368, 0.90416439],
+            [0.48339456, -2.32742195, -0.59321527],
+        ],
+        dtype=np.float32,
+    )
+    x = torch.tensor(input_arr, device=device)
+    torch.nn.init.constant_(linear.weight, 2.3)
+    eager_out = linear(x)
+
+    def get_of():
+        # TODO(): transform torch fx code to oneflow code
+        import oneflow as flow
+
+        linear = flow.nn.Linear(3, 8, False)
+        linear = linear.to(device)
+        flow.nn.init.constant_(linear.weight, 2.3)
+
+        class LinearGraph(flow.nn.Graph):
+            def __init__(self):
+                super().__init__()
+                self.my_linear = linear
+
+            def build(self, x):
+                return self.my_linear(x)
+
+        linear_g = LinearGraph()
+        linear_g.debug(1)
+        return linear_g
+
+    g = None
+
+    def torch_interplay(x):
+        import oneflow as flow
+
+        x = flow.utils.tensor.from_torch(x)
+        nonlocal g
+        if g is None:
+            g = get_of()
+        # TODO(): This is a special pack trick, try to make it general.
+        return (flow.utils.tensor.to_torch(g(x)),)
+
+    @register_backend
+    @fake_tensor_unsupported
+    def oneflowc(gm: torch.fx.GraphModule, example_inputs: List[torch.Tensor]):
+        print("my_compiler() called with FX graph:")
+        gm.graph.print_tabular()
+        gm.forward = torch_interplay
+        return gm.forward  # return a python callable
+
+    @torch.compile(backend="oneflowc")
+    def fn(x):
+        y = linear(x)
+        return y
+
+    compile_out = fn(x)
+    test_case.assertTrue(
+        np.allclose(
+            compile_out.cpu().detach().numpy(),
+            eager_out.cpu().detach().numpy(),
+            1e-05,
+            1e-05,
+        )
+    )
+    compile_out = fn(x)
+    test_case.assertTrue(
+        np.allclose(
+            compile_out.cpu().detach().numpy(),
+            eager_out.cpu().detach().numpy(),
+            1e-05,
+            1e-05,
+        )
+    )
+
+
+@unittest.skipIf(os.getenv("ONEFLOW_TEST_CPU_ONLY"), "only test cpu cases")
+@oneflow.unittest.skip_unless_1n1d()
+class TestAsTorchBackend(oneflow.unittest.TestCase):
+    def test_relu(test_case):
+        _test_relu(test_case, "cuda")
+
+    def test_linear(test_case):
+        _test_linear(test_case, "cuda")
+
+
+if __name__ == "__main__":
+    unittest.main()

python/oneflow/utils/backend/__init__.py

@@ -0,0 +1,22 @@
+"""
+Copyright 2020 The OneFlow Authors. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+from oneflow.utils.backend.torch_compile import register_oneflowc
+
+register_oneflowc()
+
+__all__ = [
+    "register_oneflowc",
+]

python/oneflow/utils/backend/torch_compile.py

@@ -0,0 +1,52 @@
+"""
+Copyright 2020 The OneFlow Authors. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+import oneflow
+from .torch_fx_to_oneflow import to_of_transform
+
+def register_oneflowc():
+    from typing import List
+    import torch
+    from torch import fx
+    from torch._dynamo.backends.registry import register_backend
+    from torch._dynamo.backends.common import fake_tensor_unsupported
+
+    @register_backend
+    @fake_tensor_unsupported
+    def oneflowc(gm: torch.fx.GraphModule, example_inputs: List[torch.Tensor]):
+        # TODO(): fxGraphModule to nn.Graph
+        print("my_compiler() called with FX graph:")
+        gm.graph.print_tabular()
+        print("gm ", gm)
+
+        import oneflow as flow
+
+        of_gm = to_of_transform(gm)
+
+        @flow.nn.Graph.trace
+        def oneflow_fn(inputs):
+            outs = of_gm.forward(inputs)
+            return outs
+
+        oneflow_fn.debug(1)
+
+        def from_to_torch(inputs):
+            flow_inputs = flow.utils.tensor.from_torch(inputs)
+            flow_outs = oneflow_fn(flow_inputs)
+            # TODO(): general output process
+            outs = flow.utils.tensor.to_torch(flow_outs[0])
+            return (outs, )
+
+        return from_to_torch

python/oneflow/utils/backend/torch_fx_to_oneflow.py

@@ -0,0 +1,33 @@
+"""
+Copyright 2020 The OneFlow Authors. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+import oneflow
+import torch
+from torch import fx
+
+def to_of_transform(gm: torch.fx.GraphModule,
+          tracer_class : type = fx.Tracer) -> torch.fx.GraphModule:
+    for node in gm.graph.nodes:
+        # Checks if we're calling a function (i.e:
+        # torch.add)
+        if node.op == 'call_function':
+            # The target attribute is the function
+            # that call_function calls.
+            if node.target == torch.relu:
+                node.target = oneflow.relu
+
+    gm.graph.lint()
+    gm.recompile()
+    return gm