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build.yml: Limit the GitHub Runners #78

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build.yml: Limit the GitHub Runners #78

wants to merge 1 commit into from

Commits on Sep 12, 2024

  1. build.yml: Limit the GitHub Runners 

    This PR modifies NuttX CI and GitHub Actions, to comply with ASF Policy. Right now, every NuttX Pull Request will trigger 24 Concurrent Jobs (GitHub Runners), executing them in parallel: https://lupyuen.github.io/articles/ci

According to ASF Policy: We should run at most 15 Concurrent Jobs: https://infra.apache.org/github-actions-policy.html

Thus we'll cut down the Concurrent Jobs from 24 down to 15. That's 12 Linux Jobs, 2 macOS, 1 Windows. (Each job takes 30 mins to 2 hours)

(1) Right now our "Linux > Strategy" is a flat list of 20 Linux Jobs, all executed in parallel

(2) We change "Linux > Strategy" to prioritise by Target Architecture, and limit to 12 concurrent jobs

(3) So NuttX CI will initially execute 12 Build Jobs across Arm32, Arm64, RISC-V, Simulator and Xtensa. As they complete, NuttX CI will execute the remaining 8 Build Jobs (for Arm32).

(4) This will extend the Overall Build Duration from [2 hours](https://github.com/apache/nuttx/actions/runs/10817443237) to [2.25 hours](https://github.com/lupyuen4/ci-nuttx/actions/runs/10828246630)

(5) We'll also limit macOS Jobs to 2, Windows Jobs to 1
    @lupyuen
    lupyuen committed Sep 12, 2024
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