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- from typing import Any, Callable, Optional, TypeVar
- from typing_extensions import ParamSpec, TypeVarTuple, Unpack
- from torch._prims.context import TorchRefsMode
- from torch.fx import GraphModule
- from torch.fx.experimental.proxy_tensor import make_fx, wrapper_and_args_for_make_fx
- T = TypeVar("T")
- P = ParamSpec("P")
- Ts = TypeVarTuple("Ts")
- def execute(
- gm: GraphModule,
- *args: Unpack[Ts],
- executor: str = "aten",
- executor_parameters: Optional[dict] = None,
- ) -> Any:
- """
- Prototype ATen executor.
- Just executes the context's graph.
- """
- if executor == "aten":
- return gm.forward(*args)
- msg = f"Received unexpected value for 'executor': {executor}. Allowed values are: aten."
- raise ValueError(msg)
- def make_traced(fn: Callable[P, T]) -> Callable[P, T]:
- """
- Returns a function that, when called, will
- trace its torch operations to prims and then
- execute those prims on the requested trace executor
- (possibly lowering them to that trace executor first).
- Only supports the torch operations defined in _torch_to_reference_map
- in context.py and operations with positional args. All args must
- be tensors.
- In the near future all these restrictions will be lifted.
- Example usage:
- def foo(a, b):
- return torch.add(a, b)
- traced_foo = make_traced(foo)
- a = torch.randn((1, 2, 3, 4, 5), device='cuda')
- b = torch.randn((1, 2, 3, 4, 5), device='cuda')
- result = traced_foo(a, b, executor='aten')
- """
- def _traced(*args: P.args, **kwargs: P.kwargs) -> T:
- executor = str(kwargs.pop("executor", "aten"))
- # TODO: caching
- wrapped, all_args = wrapper_and_args_for_make_fx(fn, args, kwargs)
- with TorchRefsMode():
- gm = make_fx(wrapped)(all_args)
- return execute(gm, all_args, executor=executor)
- return _traced # type: ignore[return-value]
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