[ao] Added fx model report per_channel detector
Summary: This code is meant to be a tool to help people get the most out
of their backend by hinting them to use per_channel quantization if it's
supported, which will help increase accuracy significantly. The code is
completed and ready to be reviewed.
Test Plan: test/quantization/fx/test_model_report_fx.py
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79104
Approved by: https://github.com/HDCharles
