Add performance-optimized example for llama2 70b LoRA

[vysarge]

What does this PR do ?

This PR adds an example script for llama2 70b LoRA tuning (tp4pp1cp1 on H100) including optimized configs used in MLPerf 4.1 submission, plus supporting changes.

Requires #11961.

Collection: llm

Changelog

• Added example script scripts/llm/performance/mlperf_lora_llama2_70b.py
• Enabled use of atomic GEMM settings for TP overlap
• Added a custom datamodule for downloading MLPerf-processed govreport data from HF
• Added a wrapper around LlamaModel which wraps configure_model to reduce memory consumption

Usage

• You can potentially add a usage example below

python scripts/llm/performance/mlperf_lora_llama2_70b.py --help

GitHub Actions CI

The Jenkins CI system has been replaced by GitHub Actions self-hosted runners.

The GitHub Actions CI will run automatically when the "Run CICD" label is added to the PR.
To re-run CI remove and add the label again.
To run CI on an untrusted fork, a NeMo user with write access must first click "Approve and run".

Before your PR is "Ready for review"

Pre checks:

• Make sure you read and followed Contributor guidelines
• Did you write any new necessary tests?
• Did you add or update any necessary documentation?
• Does the PR affect components that are optional to install? (Ex: Numba, Pynini, Apex etc)
  • Reviewer: Does the PR have correct import guards for all optional libraries?

PR Type:

• New Feature
• Bugfix
• Documentation

If you haven't finished some of the above items you can still open "Draft" PR.

Who can review?

Anyone in the community is free to review the PR once the checks have passed.
Contributor guidelines contains specific people who can review PRs to various areas.

Additional Information

• Related to # (issue)

[erhoo82]

Can you add description on the env vars?

Please refer this PR.
#11991

[vysarge]

Done.

[erhoo82]

LGTM

[malay-nagda]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 30.43%. Comparing base (fdfeafe) to head (d01a099).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12055      +/-   ##
==========================================
+ Coverage   30.42%   30.43%   +0.01%     
==========================================
  Files        1400     1402       +2     
  Lines      177452   177665     +213     
  Branches    27196    27221      +25     
==========================================
+ Hits        53990    54075      +85     
- Misses     119345   119465     +120     
- Partials     4117     4125       +8     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.