Walkthrough

The pull request introduces a conditional check on the execution of the SummaryPrinter() within the train function in both PD and PT entrypoints. The new variable LOCAL_RANK, imported from their respective utility modules, is used to ensure that the summary is printed only when LOCAL_RANK equals 0. Additionally, LOCAL_RANK is exported as a public variable in the corresponding utility modules.

Changes

Sequence Diagram(s)

sequenceDiagram
    participant T as Train Function
    participant E as Environment (LOCAL_RANK)
    participant S as SummaryPrinter

    T ->> E: Check LOCAL_RANK value
    alt LOCAL_RANK == 0
        T ->> S: Instantiate and execute SummaryPrinter()
    else LOCAL_RANK != 0
        T ->> T: Skip SummaryPrinter execution
    end

Assessment against linked issues

Possibly related PRs

• Perf: print summary on rank 0 #4434 – Similar changes involving a rank check to control summary printing, using dist.get_rank() in a related context.

Suggested labels

Python

Suggested reviewers

• njzjz
• wanghan-iapcm

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