NVIDIA / NVIDIA/apex

request apex max scale less than 1

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#452 4 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Python
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Description

when using amp with dymaic rescaling, in some case gradient overflow is happen with scale 1 so we need scale factor less than 1 but now apex dynamic rescale does not support scale factor less than 1. i want to request dynamic rescale factor support less than 1

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating Apex's AMP dynamic-rescaling entry point and any related tests. Reproduce the reported gradient-overflow case, then verify that dynamic rescaling accepts a factor below 1 and that the behavior is covered by tests.

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Assessment

Tech stack
python
Domain
machine-learning
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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