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Implementing augmentation multiplicity using Functorch [Error: AttributeError: 'Tensor' object has no attribute '_forward_counter] #626

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@mshubhankar

Description

@mshubhankar

🐛 Bug

I am trying to implement augmentation multiplicity (as implemented in Paper 1 and Paper 2 ) using Opacus's new functionality of functorch. I am following the exact steps as pointed out by @alexandresablayrolles in #455 and #575.
However, I am facing a bug in the predictions = fmodel(params, batch) line where it says that AttributeError: 'Tensor' object has no attribute '_forward_counter'. My intuition is that the attribute _forward_counter should be added to the model while calling make_functional() but there has been some code change which might be causing this.

Any help is appreciated. Thanks!

Colab reproducible link

To Reproduce

Steps to reproduce the behavior:

  1. Open colab link
  2. Run until the end till the train() function cell
  3. The bug line has been pointed out in comments

Expected behavior

I would expect the forward function to work with the new functorch functionality.

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