NVIDIA / NVIDIA/apex

What does the OMP_NUM_THREADS env variable do and what is a good default value ?

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Dominant language
Python
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Description

Should I change the OMP_NUM_THREADS variable from its default value of 1 in order to do multi-gpu training on 1 node ?

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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 determining how OMP_NUM_THREADS relates to the repository's multi-GPU training use case on one node. Document what the variable controls and what default guidance applies; the issue names no files or tests, so completion is a clear explanatory answer rather than a code change.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
distributed-systems, machine-learning
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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