Pytorch 2.0 compile warning meaning

I see that there is warning when run a model using torch.compile(model) way

Warning:
2128922-2023-01-18 10:11:40:751 INFO [logging.py:121] — Step 1: torchdynamo start tracing forward
2128922-2023-01-18 10:11:40:756 INFO [logging.py:121] — Step 1: torchdynamo done tracing forward (RETURN_VALUE)
2128922-2023-01-18 10:11:40:757 INFO [logging.py:121] — Step 2: calling compiler function debug_wrapper
2128922-2023-01-18 10:11:40:884 INFO [logging.py:121] — Step 3: torchinductor compiling FORWARDS graph 0
2128922-2023-01-18 10:11:40:887 WARNING [graph.py:280] — Creating implicit fallback for:
target: aten._adaptive_avg_pool3d.default
args[0]: TensorBox(StorageBox(
InputBuffer(name=‘primals_1’, layout=FixedLayout(‘cpu’, torch.float32, size=[8, 2048, 7, 7], stride=[100352, 49, 7, 1]))
))
args[1]: [32, 7, 7]
2128922-2023-01-18 10:11:40:894 WARNING [ir.py:2942] — Using FallbackKernel: torch.ops.aten._adaptive_avg_pool3d.default

can someone help me to understand above the reason of fallback? is it running in eager mode?
what can be done to execute in compile mode?

Yes fallback means it’s falling back to eager mode, you can add a decomposition for it so that’s no longer the case - it’s a good first issue TorchInductor missing ops tracker · Issue #93757 · pytorch/pytorch · GitHub