pytorch
Fix amp_bf16 train with staged_train_test
This PR is to fix the issue of amp_bf16 train with staged_train_test in CPU. Need set forward_contexts correctly with torch.cpu.amp.autocast(dtype=torch.bfloat16), otherwise, in staged_train_test, model cannot run into bf16 successfully.
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@xuzhao9 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.
@xuzhao9 merged this pull request in pytorch/benchmark@7cf8cb911c43cddad05c3fcd85d953143bf6f4c0.