mirror of https://github.com/llvm/torch-mlir
106 lines
2.7 KiB
Python
106 lines
2.7 KiB
Python
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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# Also available under a BSD-style license. See LICENSE.
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"""
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Example use of the example Torch MLIR LTC backend.
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"""
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import argparse
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import sys
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import torch
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import torch._lazy
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import torch.nn.functional as F
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def main(device='lazy'):
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"""
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Load model to specified device. Ensure that any backends have been initialized by this point.
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:param device: name of device to load tensors to
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"""
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torch.manual_seed(0)
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inputs = torch.tensor([[1, 2, 3, 4, 5]], dtype=torch.float32, device=device)
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assert inputs.device.type == device
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targets = torch.tensor([3], dtype=torch.int64, device=device)
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assert targets.device.type == device
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print("Initialized data")
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class Model(torch.nn.Module):
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def __init__(self):
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super().__init__()
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self.fc1 = torch.nn.Linear(5, 10)
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def forward(self, x):
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out = self.fc1(x)
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out = F.relu(out)
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return out
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model = Model().to(device)
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model.train()
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assert all(p.device.type == device for p in model.parameters())
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print("Initialized model")
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criterion = torch.nn.CrossEntropyLoss()
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optimizer = torch.optim.SGD(model.parameters(), lr=0.01)
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num_epochs = 3
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losses = []
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for _ in range(num_epochs):
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optimizer.zero_grad()
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outputs = model(inputs)
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loss = criterion(outputs, targets)
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loss.backward()
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losses.append(loss)
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optimizer.step()
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if device == "lazy":
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print("Calling Mark Step")
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torch._lazy.mark_step()
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# Get debug information from LTC
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if 'ltc_backend' in sys.modules:
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computation = ltc_backend.get_latest_computation()
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if computation:
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print(computation.debug_string())
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print(losses)
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return model, losses
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if __name__ == "__main__":
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"-d",
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"--device",
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type=str.upper,
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choices=["CPU", "TS", "MLIR_EXAMPLE"],
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default="MLIR_EXAMPLE",
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help="The device type",
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)
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args = parser.parse_args()
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if args.device in ("TS", "MLIR_EXAMPLE"):
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if args.device == "TS":
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import torch._lazy.ts_backend
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torch._lazy.ts_backend.init()
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elif args.device == "MLIR_EXAMPLE":
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import ltc_backend.ltc_backend._EXAMPLE_MLIR_BACKEND as ltc_backend
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ltc_backend._initialize()
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device = "lazy"
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print("Initialized backend")
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else:
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device = args.device.lower()
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main(device)
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