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74 lines
2.6 KiB
YAML
74 lines
2.6 KiB
YAML
name: Shadow — Shared CPU Spike
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# OS-49 Phase 2 / PR 1 — non-blocking spike. Runs `cargo check` on the
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# nv-gha-runners shared CPU pool (`linux-{amd64,arm64}-cpu8`) with a
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# GHA-backed sccache.
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#
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# Plan, decision thresholds, and results live in the Linear doc attached
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# to OS-126 ("OS-126 — Shared CPU spike plan & results"). Dispatch this
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# workflow 4–5 times after merge and record numbers there.
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on:
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workflow_dispatch:
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permissions:
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contents: read
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packages: read
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env:
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CARGO_TERM_COLOR: always
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CARGO_INCREMENTAL: "0"
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MISE_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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# Wire sccache (already RUSTC_WRAPPER in mise.toml) to the GHA cache
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# backend instead of the EKS memcached used by ARC.
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SCCACHE_GHA_ENABLED: "true"
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jobs:
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rust-check:
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name: cargo check (${{ matrix.runner }})
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strategy:
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fail-fast: false
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matrix:
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runner: [linux-amd64-cpu8, linux-arm64-cpu8]
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runs-on: ${{ matrix.runner }}
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env:
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# Partition the GHA sccache cache per-arch. Without this, matrix jobs
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# collide on the same cache key, and the later-starting job's writes
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# fail with 409 Conflict while the earlier one's writes land — leaving
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# subsequent runs with asymmetric and mostly-empty caches.
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# (Run 1 on 2026-04-24 showed amd64 with 0/1062 writes succeeding
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# while arm64 got 575/1064.)
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SCCACHE_GHA_VERSION: ${{ matrix.runner }}
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container:
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image: ghcr.io/nvidia/openshell/ci:latest
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credentials:
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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timeout-minutes: 60
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steps:
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- uses: actions/checkout@v6
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- name: Install tools
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run: mise install
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- name: Configure GHA sccache backend
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# Exposes ACTIONS_CACHE_URL / ACTIONS_RUNTIME_TOKEN to subsequent steps
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# so sccache (wrapped around rustc via RUSTC_WRAPPER in mise.toml) can
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# initialize the GHA cache. Without this, sccache fails at startup with
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# "cache url for ghac not found". The action also installs its own
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# sccache binary; harmless since mise's sccache remains on PATH.
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uses: mozilla-actions/sccache-action@7d986dd989559c6ecdb630a3fd2557667be217ad # v0.0.9
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- name: Cache Rust target and registry
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uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
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with:
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shared-key: shadow-shared-cpu-spike-${{ matrix.runner }}
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cache-directories: .cache/sccache
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- name: cargo check
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run: mise x -- cargo check --workspace --all-targets
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- name: sccache stats
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if: always()
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run: mise x -- sccache --show-stats
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