mirror of https://github.com/llvm/torch-mlir
55 lines
1.6 KiB
Markdown
55 lines
1.6 KiB
Markdown
# Torch-MLIR Lazy Tensor Core Backend Examples
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Refer to the main documentation [here](ltc_backend.md).
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## Example Usage
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```python
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import torch
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import torch._lazy
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import torch_mlir._mlir_libs._REFERENCE_LAZY_BACKEND as lazy_backend
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# Register the example LTC backend.
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lazy_backend._initialize()
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device = 'lazy'
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# Create some tensors and perform operations.
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inputs = torch.tensor([[1, 2, 3, 4, 5]], dtype=torch.float32, device=device)
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outputs = torch.tanh(inputs)
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# Mark end of training/evaluation iteration and lower traced graph.
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torch._lazy.mark_step()
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print('Results:', outputs)
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# Optionally dump MLIR graph generated from LTC trace.
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computation = lazy_backend.get_latest_computation()
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if computation:
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print(computation.debug_string())
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```
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```
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Received 1 computation instances at Compile!
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Received 1 arguments, and returned 2 results during ExecuteCompile!
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Results: tensor([[0.7616, 0.9640, 0.9951, 0.9993, 0.9999]], device='lazy:0')
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JIT Graph:
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graph(%p0 : Float(1, 5)):
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%1 : Float(1, 5) = aten::tanh(%p0)
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return (%p0, %1)
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MLIR:
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func.func @graph(%arg0: !torch.vtensor<[1,5],f32>) -> (!torch.vtensor<[1,5],f32>, !torch.vtensor<[1,5],f32>) {
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%0 = torch.aten.tanh %arg0 : !torch.vtensor<[1,5],f32> -> !torch.vtensor<[1,5],f32>
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return %arg0, %0 : !torch.vtensor<[1,5],f32>, !torch.vtensor<[1,5],f32>
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}
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Input/Output Alias Mapping:
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Output: 0 -> Input param: 0
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In Mark Step: true
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```
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## Example Models
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There are also examples of a [HuggingFace BERT](../projects/pt1/examples/ltc_backend_bert.py) and [MNIST](../projects/pt1/examples/ltc_backend_mnist.py) model running on the example LTC backend.
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