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Improved parallel logging of learning rate - #3319

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ko3n1g merged 3 commits into
NVIDIA:mainfrom
jstjohn:update_lr_logging
Feb 12, 2026
Merged

Improved parallel logging of learning rate#3319
ko3n1g merged 3 commits into
NVIDIA:mainfrom
jstjohn:update_lr_logging

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@jstjohn

@jstjohn jstjohn commented Feb 9, 2026

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What does this PR do ?

Rewrite of how we handle parallel logging of the learning rate. Taking advantage of some megatron functionality including making use of the learning rate stored in empty param groups (eg those that have weights on other ranks). This PR replaces #3258

Contribution process

flowchart LR
    A[Pre-checks] --> B[PR Tests]
    subgraph Code Review/Approval
        C1[Expert Review] --> C2[Final Review]
    end
    B --> C1
    C2 --> D[Merge]
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Pre-checks

  • I want this PR in a versioned release and have added the appropriate Milestone (e.g., Core 0.8)
  • I have added relevant unit tests
  • I have added relevant functional tests
  • I have added proper typing to my code Typing guidelines
  • I have added relevant documentation
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@jstjohn
jstjohn requested a review from ko3n1g February 9, 2026 18:40
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@jstjohn

jstjohn commented Feb 9, 2026

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/ok to test fae5e57

@BoxiangW BoxiangW left a comment

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LGTM, thx

@jstjohn

jstjohn commented Feb 10, 2026

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/ok to test d3af5bc

@jstjohn

jstjohn commented Feb 11, 2026

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/ok to test cd66f91

@ko3n1g
ko3n1g enabled auto-merge February 11, 2026 00:52
@ko3n1g

ko3n1g commented Feb 11, 2026

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validated on the gpt release run

@ko3n1g

ko3n1g commented Feb 11, 2026

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🔄 Merge queue validation started!

You can track the progress here: https://github.com/NVIDIA/Megatron-LM/actions/runs/21927774607

@ko3n1g

ko3n1g commented Feb 12, 2026

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🔄 Merge queue validation started!

You can track the progress here: https://github.com/NVIDIA/Megatron-LM/actions/runs/21928298859

@ko3n1g

ko3n1g commented Feb 12, 2026

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🔄 Merge queue validation started!

You can track the progress here: https://github.com/NVIDIA/Megatron-LM/actions/runs/21945988636

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5 participants